JP2017009074A - Packer water stop device and piping water stop method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a packer water stop device and a piping water stop method capable of positively stopping water for a piping where a worker cannot enter.SOLUTION: A packer water stop device includes a first packer 11 and a second packer 12 communicated to each other while being spaced apart to each other, expanded through supplying of fluid and shrunk through discharging of fluid and arranged in a piping 100; a supply or discharging device 13 for supplying and discharging fluid in respect to the first packer 11 and the second packer 12; supply and discharge lines 14, 15 for fluid supplying and fluid discharging in respect to the first packer 11 and the second packer 12; a pressurizing device 21 for supplying gas; a pressurizing line 22 connected at one end with the pressurizing device 21 and opened at the other end between the first packer 11 and the second packer 12; and a pressure state detecting part 23 arranged at the pressurizing line 22 to detect a physical amount corresponding to a pressure state of the pressurizing line 22.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a packer water stop device and a pipe water stop method. More specifically, the present invention relates to a device for temporarily stopping a flow in a pipe with a packer (blocking tool) and a state where water is temporarily stopped with a packer. The present invention relates to a method for stopping the flow in a pipe by injecting water material.

  When repairing an existing pipe such as a drain pipe or a sewer pipe, it is usually necessary to stop a part of the pipe. Known as a water stop method for pipes is to insert a packer in the pipe to form a temporary closed space in the pipe, and then inject a water stop material such as grout material and solidify it. (For example, refer to Patent Document 1). In the water stop method (water stop method) described in Patent Document 1, a packer having a front packer portion and a rear packer portion that expand and contract at both front and rear end portions is movably installed in an existing power pipeline, By expanding both packer parts, a limited space is formed between both packer parts, and when it is judged that there is a flooded part in this limited space, a water stopping material (grouting material) is injected into the limited space and the power line A part of the water is stopped.

JP-A-5-52291

  The inundation assumed in the water stopping method described in Patent Document 1 is considered to be a state in which groundwater oozes out to the power line through a minute crack. That is, in the power line, the amount of water immersion is small and there is almost no flow due to water immersion. In this case, it is assumed that a closed portion (limited space) can always be formed in the piping by inflating the packer, and that the possibility of incomplete water stoppage by the packer is not considered. .

  However, a large amount of water may flow in piping other than the power line. In this case, even if the packer is expanded, water cannot be completely stopped, and a part of the flow may leak from the packer. Even if the waterstop material is injected in a state where there is a leak from the packer, it is hard to solidify in a region where there is a leak (flow). Therefore, the water-stopping material is solidified in a state in which water remains due to leakage, and water-stopping by the water-stopping material becomes incomplete. In this case, it is necessary to inject the water-stopping material again to stop the water, but the water-stopping material remaining in the pipe hinders new water-stopping. Thus, once the water stop material is injected into the pipe, it is difficult to redo the work. For this reason, when stopping a part of piping with a flow of a large amount of water, it is required to stop the water surely by injecting a water stop material in a state where the temporary water stop by the packer is good. .

  As a means for confirming whether the water stoppage by the packer is good, for example, an operator can enter the pipe and visually check. However, an operator may not be able to enter the pipe due to a small diameter pipe or the environment in the pipe. Even in such a case, it is desirable to inject the water-stopping material in a state where the water-stopping by the packer is good.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a packer water stop device and a pipe water stop method that can reliably stop a pipe that an operator cannot enter. It is.

  In order to solve the above problems, for example, the configuration described in the claims is adopted.

  The present application includes a plurality of means for solving the above problems. For example, a packer water stop device for stopping the flow in the pipe, which is connected to each other at an interval and expands by supplying fluid. In addition, the first packer and the second packer disposed in the pipe, and the supply and discharge of the fluid to and from the first packer and the second packer are contracted by the discharge of the fluid. An apparatus, a supply / discharge line for supplying and discharging fluid to and from the first packer and the second packer, a pressurizing apparatus for supplying gas, and one end connected to the pressurizing apparatus and the other end Is a pressure line that opens between the first packer and the second packer, and a pressure state detection unit that is provided in the pressure line and detects a physical quantity corresponding to the pressure state of the pressure line; Equipped with The features.

According to the present invention, the intermediate region is added by supplying gas via the pressure line to the intermediate region defined by the expanded first packer and the second packer and the inner wall of the pipe therebetween. Since the pressurization state of the intermediate region can be confirmed based on the physical quantity corresponding to the pressure state of the pressurization line, the quality of the water stoppage by the first packer and the second packer can be determined at a remote location Can do. Therefore, since the water stop material can be injected in a state where the water stop by the packer water stop device is good, it is possible to reliably stop the pipe that the operator cannot enter.
Problems, configurations, and effects other than those described above will be clarified by the following description of embodiments.

It is a schematic longitudinal cross-sectional view which shows the sewer pipe which is the water stop object of the packer water stop apparatus and pipe water stop method of this invention. It is a schematic block diagram which shows 1st Embodiment of the packer water stop apparatus of this invention. It is explanatory drawing which shows an example of the piping water stop method in 1st Embodiment of the packer water stop apparatus of this invention. It is an assumption figure which shows progress of the operation state of the pressurization pump linked with the progress of the detection result of a pressure gauge in the case where the water stop by the 1st embodiment of the packer water stop device of the present invention is good. . The assumption figure which shows progress of the operation state of the pressurization pump linked with the progress of the detection result of a pressure gauge in the case where the water stop by the 1st embodiment of the packer water stop device of the present invention is incomplete. is there. It is explanatory drawing which shows the other example of the piping water stop method in 1st Embodiment of the packer water stop apparatus of this invention. It is a schematic block diagram which shows 2nd Embodiment of the packer water stop apparatus of this invention. It is explanatory drawing which shows the piping water stop method in 2nd Embodiment of the packer water stop apparatus of this invention. It is a schematic block diagram which shows 3rd Embodiment of the packer water stop apparatus of this invention.

Hereinafter, embodiments of a packer water stop device and a pipe water stop method of the present invention will be described with reference to the drawings.
First, the structure of the piping which is the water stop object of the packer water stop apparatus and pipe water stop method of this invention is demonstrated using FIG. Here, a sewer pipe will be described as an example of a pipe to be stopped. FIG. 1 is a schematic longitudinal sectional view showing a sewer pipe which is a water stop target of the packer water stop device and the pipe water stop method of the present invention. In FIG. 1, the left side is the upstream side of the sewer pipe, and the right side is the downstream side.

  In FIG. 1, a sewer pipe 100 includes a plurality of horizontal pipes 101 (only one is shown in FIG. 1) embedded in the ground, and a plurality (three are shown in FIG. 1) that are connected to the horizontal pipe 101 and open to the ground. ) Vertical pipes 102a, 102b, 102c. The plurality of horizontal pipes 101 are connected to each other and extend in a mesh shape. In the sewer pipe 100 having such a configuration, for example, it is assumed that water from the ground water flow W leaks into the vertical pipe 102b and flows into the horizontal pipe 101. If a large amount of water that does not require sewage treatment flows into the sewer pipe 100, the amount of sewage treatment will increase more than necessary, so it is necessary to stop the water at a position where the sewer pipe 100 is located. Then, in the state which temporarily stopped the flow in the sewer pipe | tube 100 using the embodiment of the packer water stop apparatus of this invention as follows, it stops water by injecting and solidifying a water stop material. .

[First Embodiment]
The structure of 1st Embodiment of the packer water stop apparatus of this invention is demonstrated using FIG. FIG. 2 is a schematic configuration diagram showing the first embodiment of the packer water stop device of the present invention. In FIG. 2, the same reference numerals as those shown in FIG. 1 denote the same parts, and detailed description thereof will be omitted.
In FIG. 2, the packer water stop device has a packer device 1 that temporarily stops a part of the piping (in FIG. 2, the vertical pipe 102 of the sewer pipe 100), and whether the water stop by the packer device 1 is good. And a pressurizing system 2 for determining whether or not.

  The packer device 1 is provided with two packers, which are composed of a first packer 11 and a second packer 12 that are expanded by supply of fluid and contracted by discharge of fluid, and are spaced apart from each other. The 1st packer 11 and the 2nd packer 12 are the bag-shaped things formed with the elastic material, and are inserted and arrange | positioned in piping. The packer device 1 further includes a supply / discharge device 13 that supplies and discharges fluid to and from the first packer 11 and the second packer 12, and supply and discharge of fluid to and from the first packer and the second packer. A first supply / discharge line 14 and a second supply / discharge line 15 are provided. The first supply / discharge line 14 has one end connected to the supply / discharge device 13 and the other end connected to the first packer 11. The second supply / discharge line 15 has one end connected to the first packer 11 and the other end connected to the second packer 12, and supplies and discharges fluid to and from the second packer 12. This is to be performed simultaneously with the packer 11.

  The pressurization system 2 includes a pressurization device 21 that supplies gas, and a pressurization line that has one end connected to the pressurization device 21 and the other end opened between the first packer 11 and the second packer 12. 22 and a pressure gauge 23 serving as a pressure state detection unit provided on the pressurizing device 21 side in the pressurizing line 22. The pressurization line 22 extends through the first packer 11 and is independent of the supply / discharge lines 14 and 15 of the packer device 1. The pressure gauge 23 detects the pressure in the pressurization line 22 and outputs a detection signal corresponding to the detected pressure to the pressurization device 21.

  The pressurizing device 21 includes a pressurizing pump 25 that supplies gas, a driving power source 26 that drives the pressurizing pump 25, and a manual switch 27 that performs an on / off operation of the driving power source 26. The pressurizing device 21 is configured so that the pressurizing pump 25 does not operate when the manual switch 27 is off. Further, when the manual switch 27 is turned on and the detection signal of the pressure gauge 23 is smaller than a preset lower limit set value Pd, the pressurizing pump 25 is configured to start. Further, the pressurization pump 25 is configured to stop when the detection signal of the pressure gauge 23 is larger than a preset upper limit set value Pu that is larger than the lower limit set value Pd. In other words, when the manual switch 27 is on, the pressurizing device 21 increases the pressure (detection signal) in the pressurizing line 22 detected by the pressure gauge 23 until the pressure reaches a preset pressure target value (upper limit set value Pu). While continuing to pressurize, when the pressure target value is reached, pressurization is automatically stopped.

  In the first embodiment of the packer water stop device of the present invention, a part of the pipe 102 is temporarily stopped by the packer device 1 and the water stop by the packer device 1 is good before the water stop material M is injected. Is determined by the pressurization system 2. Thereby, the water stop material M can be inject | poured in the state with the favorable water stop by the packer apparatus 1, ie, the state which does not flow in the piping 102, and the water stop of the piping 102 can be performed reliably. The water stop material M is injected by the water stop material injection device 31 through the water stop material injection line 32. As the water stop material M, for example, a material having a long service life, such as a grout material, may be used.

  Next, an example of the piping water stopping method in the first embodiment of the packer water stopping device of the present invention will be described with reference to FIGS. As an example of the pipe water stopping method of the present embodiment, a case will be described in which water is stopped at a portion of the vertical pipe 102b on the lower side of the leakage location from the groundwater flow W. If the leakage water of the groundwater flow W can be stopped well at this position, the leakage water can be prevented from flowing into the horizontal piping 101 to which the vertical piping 102b is connected.

  FIG. 3 is an explanatory view showing an example of a pipe water-stop method in the first embodiment of the packer water-stop device of the present invention, and FIG. 4 shows the water-stop according to the first embodiment of the packer water-stop device of the present invention. FIG. 5 is a schematic diagram showing the progress of the pressure gauge detection result and the progress of the operating state of the pressurizing pump linked to the detection result in the case of good condition, and FIG. 5 shows the stop according to the first embodiment of the packer water stop device of the present invention. It is an assumption figure showing progress of a detection result of a pressure gauge in case water is incomplete, and progress of an operating state of a pressurization pump interlocked with the detection result. 3 to 5, the same reference numerals as those shown in FIGS. 1 and 2 are the same parts, and the detailed description thereof will be omitted.

  First, a part of piping is temporarily stopped by the packer device 1. Specifically, the first packer 11 and the second packer 12 of the packer apparatus 1 shown in FIG. 3 are inserted into the vertical pipe 102b and arranged below the leakage location of the groundwater flow W. Thereafter, by operating the supply / discharge device 13, a fluid is supplied to the first packer 11 via the first supply / discharge line 14, and the first packer 11 is expanded. At this time, since the second packer 12 is connected to the first packer 11 via the second supply / discharge line 15, fluid is supplied simultaneously with the first packer 11 to expand. In this way, by inflating the first packer 11 and the second packer 12, water is temporarily stopped at the first packer 11, and the first packer 11 and the second packer 12 and those An intermediate region S is defined by the inner wall of the vertical pipe 102b between the two. At this time, the intermediate region S may be in a two-phase state of leaked water and air.

  Next, the pressurization system 2 determines whether or not the temporary water stop by the packer device 1 is good. Specifically, by operating the pressurizing device 21, the pressurized gas is supplied to the intermediate region S via the pressurization line 22, and the intermediate region S is pressurized. Thereafter, it is determined from the pressurized state of the intermediate region S whether or not the temporary water stop by the packer device 1 is good. That is, when the intermediate region S is pressurized by the pressurizing device 21 and the pressure rises to the pressure target value, it is determined that the water stoppage state by the first packer 11 and the second packer 12 is good. On the other hand, if the pressure does not increase to the target pressure value even when the intermediate region S is pressurized by the pressurizing device 21, it is determined that the water stop state is incomplete.

Here, the detailed procedure of the determination method using the pressurization system 2 will be described below.
First, the manual switch 27 of the pressurizing device 21 is turned on. Thereby, power is supplied from the drive power supply 26 and the pressurization pump 25 is started. Thereafter, the pressurizing device 21 determines whether or not to stop the pressurizing pump 25 by comparing the detection signal input from the pressure gauge 23 with the upper limit set value Pu. When the detection signal is equal to or higher than the upper limit set value Pu, pressurization of the intermediate region S is stopped. On the other hand, when the detection signal is smaller than the upper limit set value Pu, pressurization is continued. Further, when the pressurization device 21 is stopped due to the detection signal being equal to or higher than the upper limit set value Pu, the pressurization device 21 compares the detection signal of the pressure gauge 23 with the lower limit set value Pd, thereby increasing the pressurization pump 25. It is determined whether or not to restart. When the detection signal is equal to or higher than the lower limit set value Pd, the pressurization pump 25 is stopped. On the other hand, when the detection signal is smaller than the lower limit set value Pd, the pressurizing pump 25 is restarted.

  In the present embodiment, when the detection signal of the pressure gauge 23 reaches the upper limit set value Pu at least once within a preset set time Tj after the manual switch 27 is turned on, the pressurizing device 21 It determines with the water stop by the apparatus 1 being favorable. On the other hand, when the detection signal of the pressure gauge 23 has never reached the upper limit set value Pu within the set time Tj, the pressurizing device 21 determines that the water stoppage by the packer device 1 is incomplete. The set time Tj needs to take into account the time from when the pressurizing device 21 is operated until the detected value of the pressure gauge 23 is settled. When the intermediate region S is in a two-phase state of water and gas, it may take some time for the detected value of the pressure gauge 23 to settle.

  If the first packer 11 and the second packer 12 expand, both the contact surface between the first packer 11 and the vertical pipe 102b and the contact surface between the second packer 12 and the vertical pipe 102b When both are completely closed, the intermediate region S becomes a sealed space. In this case, when the pressurizing device 21 is operated, the intermediate region S is in a pressurized state. Accordingly, as shown in FIG. 4, the pressure in the pressurization line 22 rises to a pressure target value (upper limit set value Pu), and the pressurization pump 25 automatically stops. Thereafter, when the pressurization pump 25 is stopped, the pressure in the pressurization line 22 gradually decreases and becomes lower than the lower limit set value Pd, and the pressurization pump 25 is restarted. If the intermediate region S is a sealed space, the pressure in the pressurization line 22 rises again to the pressure target value (upper limit setting value Pu). As described above, if the intermediate region S is in a sealed space state, that is, if the temporary water stoppage by the packer device 1 is good, the pressurization pump 25 is activated and the pressure in the pressurization line 22 is increased. The cycle of stopping the pressurizing pump 25 and decreasing the pressure in the pressurizing line 22 is repeated. That is, it corresponds to the case where the detection signal of the pressure gauge 23 reaches the upper limit set value Pu at least once within the set time Tj, and is determined to be in a good water stop state.

  On the other hand, when either one of the contact surface between the first packer 11 and the vertical pipe 102b or the contact surface between the second packer 12 and the vertical pipe 102b cannot be closed, the intermediate region S is a sealed space. Not. In this case, even if the intermediate region S is pressurized by the pressurizing pump 25, the gas leaks from the portion that cannot be closed. For this reason, as shown in FIG. 5, since the pressure in the pressurization line 22 does not reach the pressure target value (upper limit set value Pu), the pressurization pump 25 continues to operate. This corresponds to the case where the detection signal of the pressure gauge 23 has never reached the upper limit set value Pu within the set time Tj, and it is determined that the water stop state is incomplete.

  In this way, by checking the pressurization state of the intermediate region S pressurized by the pressurization device 21 based on the pressure detected by the pressure gauge 23 provided on the pressurization line 22, the water stoppage by the packer device 1 is prevented. Since it determines whether it is favorable, it can determine correctly the quality of the temporary water stop of piping from a remote place, without approaching piping, such as the vertical piping 102b.

  If it is determined that the water stoppage by the packer device 1 is incomplete, the first and second packers 11 and 12 are contracted without injecting the water stop material M into the pipe 102b. Re-expansion is performed in order, or the first and second packers 11 and 12 are contracted, pulled out from the pipe 102b, reinserted into the pipe 102b, and re-expanded in order, and re-watering by the packer device 1 is attempted. . Thereafter, the pressurization system 2 re-determines whether or not the water stoppage by the packer device 1 is good.

  Specifically, by operating the supply / discharge device 13, the fluid in the first and second packers 11, 12 is discharged via the first and second supply / discharge lines 14, 15, and the first and second The two packers 11 and 12 are contracted. Next, for example, by operating the supply / discharge device 13, the first and second packers 11 and 12 are re-expanded, and a part of the vertical pipe 102 b is temporarily stopped again. Thereafter, as described above, the pressurizing device 21 is operated to pressurize the intermediate region, and the pressurizing system 2 determines whether or not the water stoppage by the packer device 1 is good based on the pressure detected by the pressure gauge 23. judge. If it is still determined that the water stoppage is incomplete, the first and second packers 11 and 12 are contracted again and pulled out from the vertical pipe 102b, and the states of the first and second packers 11 and 12 are confirmed. To do. Then, the first and second packers 11 and 12 are reinserted into the vertical pipe 102b and re-expanded, and the pressurization system 2 re-determines whether or not the water is stopped by the packer device 1.

  When the detection signal of the pressure gauge 23 reaches the upper limit set value Pu at least once within the set time Tj and it is determined that the water stop state is good, the weir formed by the upper surface of the first packer 11 and the vertical pipe 102b The water-stopping material M having a specific gravity greater than that of water is injected into the portion by the water-stopping material injection device 31 through the water-stopping material injection line 32.

  Thus, since the water stop material M is inject | poured after confirming that the temporary water stop by the packer apparatus 1 is favorable, the water stop material M solidifies in the stationary state without a flow, and the water stop material M Thus, a part of the pipe 102b can be reliably stopped. In addition, by using a grout material having a long service life as the water-stopping material M, the piping by the water-stopping material M even after the first packer 11 and the second packer 12 deteriorate and lose their water-stopping function. Long-term water stoppage is possible.

  According to the above-described first embodiment of the packer water stop device of the present invention and the example of the pipe water stop method, the expanded first packer 11 and second packer 12 and the vertical pipe (pipe) between them. ) The intermediate region S is pressurized by supplying gas to the intermediate region S defined by the inner wall of 102b through the pressurization line 22, and based on the pressure of the pressurization line 22 (physical quantity corresponding to the pressure state). Since the pressurization state of the intermediate region S can be confirmed, the quality of the water stoppage by the first packer 11 and the second packer 12 can be confirmed at a remote place. Therefore, since the water stop material M can be poured in a state where the water stop by the packer water stop device is good, it is possible to reliably stop the vertical pipe (pipe) 102b that an operator cannot enter.

  Further, according to the present embodiment, the supply / discharge line for supplying and discharging the fluid to and from the first packer 11 and the second packer 12 is connected to the supply / discharge device 13 and the first packer 11. Since the first supply / discharge line 14 and the second supply / discharge line 15 connecting the first packer 11 and the second packer 12 are configured, the first packer 11 and the second packer 12 are expanded simultaneously. Can be shrunk. For this reason, the operation procedure of a water stop operation | work can be decreased rather than the case where the 1st and 2nd packers 11 and 12 are operated separately.

Further, according to the present embodiment, the pressurizing device 21 determines whether or not the packer device 1 is stopped based on the detection signal of the pressure gauge 23, so that the operator can press the pressure gauge 23 during pressurization of the intermediate region. Therefore, it is not necessary to determine whether or not the packer device 1 stops water.
Next, another example of the piping water stopping method in the first embodiment of the packer water stopping device of the present invention will be described with reference to FIG.
FIG. 6 is an explanatory view showing another example of the pipe water stopping method in the first embodiment of the packer water stopping device of the present invention. In FIG. 6, the same reference numerals as those shown in FIGS. 1 to 5 are the same parts, and detailed description thereof is omitted.

  Another example of the pipe water stopping method using the first embodiment of the packer water stopping apparatus of the present invention shown in FIG. 6 is that an example of the pipe water stopping method stops water in the middle of the vertical pipe 102b. On the other hand, water is stopped at the joint between the vertical pipe 102b and the horizontal pipe 101. By stopping the leaked water at the joint, it is possible to prevent the leaked water from flowing into the horizontal pipe 101 downstream from the joint. Therefore, in this pipe water stop method, two sets of the packer water stop device of the first embodiment, that is, two sets of the packer device 1 and the pressurization system 2 are used.

  Specifically, first, the water flow of the horizontal pipe 101 is blocked at the joint between the vertical pipe 102b to be stopped and the horizontal pipe 101. Specifically, as shown in FIG. 6, the first of one packer device 1 out of two sets of packer devices 1 from the vertical piping 102 a on the upstream side of the horizontal piping 101 as viewed from the joint portion to be water-stopped. The packer 11 and the second packer 12 are inserted and arranged in the horizontal pipe 101 on the upstream side from the joint portion to be stopped. About the procedure of the water stop by the one packer apparatus 1 after that and the procedure of the determination by the one pressurization system | strain 2 about the quality of water stop, it is the same as that of the case of the example of the pipe water stop method mentioned above.

  Next, the flow of leaked water from the vertical pipe 102b is blocked. From the joint where the first packer 11 and the second packer 12 of the other packer device 1 are inserted from the vertical pipe 102c on the downstream side of the horizontal pipe 101 when seen from the joint where the water should be stopped. It arrange | positions in the horizontal piping 101 of a downstream side. The subsequent water stop procedure by the other packer device 1 and the determination procedure by the other pressurization system 2 regarding the quality of the water stop are the same as those in the above-described example of the pipe water stop method.

  When it is determined that the water stoppage by the one and the other packer apparatuses 1 and 1 is good, the second packer 12 of the one packer apparatus 1 located on the upstream side and the other packer apparatus located on the downstream side The water-stopping material M is injected by the water-stopping material injection device 31 into the portion of the weir formed by the first second packer 12, the horizontal pipe 101 between them, and the vertical pipe 102b. The injected water-stopping material M is solidified in a stationary state with no flow, so that the joint can be reliably stopped.

  According to the other example of the piping water stopping method in the first embodiment of the packer water stopping device of the present invention described above, the first and second packers 11 and 12 of the one and the other packer devices 1 respectively draw images. Each formed intermediate region S is pressurized via each pressure line 22 of one and the other pressure systems 2, and the pressure state of each intermediate region S is confirmed based on the pressure of each pressure line 22. Similarly to the example of the pipe water stopping method described above, the quality of water stopping by the packer water stopping device can be confirmed at a remote place. Therefore, since the water stop material M can be poured in a state where the water stop by the packer water stop device is good, the sewer pipe (pipe) 100 that the operator cannot enter can be reliably stopped.

  In addition, according to another example of the pipe water stopping method of the present embodiment, by using two sets of packer water stopping apparatuses configured by the packer apparatus 1 and the pressurization system 2, the vertical pipe 102b and the horizontal pipe 101 The joint part can be stopped.

[Second Embodiment]
Next, 2nd Embodiment of the packer water stop apparatus of this invention and its piping water stop method are demonstrated using FIG.7 and FIG.8.
FIG. 7 is a schematic configuration diagram showing a second embodiment of the packer water stop device of the present invention, and FIG. 8 is an explanatory diagram showing a pipe water stop method in the second embodiment of the packer water stop device of the present invention. is there. 7 and 8, the same reference numerals as those shown in FIGS. 1 to 6 are the same parts, and the detailed description thereof will be omitted.

The differences between the configurations of the second embodiment and the first embodiment of the packer water stop device of the present invention shown in FIG. 7 are as follows.
The packer device 1 according to the first embodiment connects the first packer 11 to the supply / discharge device 13 via the first supply / discharge line 14 and the first packer via the second supply / discharge line 15. By connecting 11 and the second packer 12, the first packer 11 and the second packer 12 are configured to expand and contract simultaneously (see FIG. 2). On the other hand, the packer device 1A of the present embodiment supplies and discharges the first packer 11 and the second packer 12 via the first supply / discharge line 14 and the second supply / discharge line 15A, which are independent of each other. By connecting to 13A, it is comprised so that the 1st packer 11 and the 2nd packer 12 can expand / contract at an independent timing, respectively. That is, the second supply / discharge line 15 </ b> A extends through the first packer 11, one end of which is connected to the supply / discharge device 13 </ b> A and the other end is connected to the second packer 12. The supply / discharge device 13A has two sets of pumps for supply / discharge in order to expand and contract the first packer 11 and the second packer 12 independently.

  Moreover, the packer water stop apparatus of this Embodiment is further provided with the waste_water | drain exhaust system 4 which discharges | emits the water and gas which exist in the intermediate | middle area | region S outside. The drainage / exhaust system 4 includes a drainage / exhaust device 41 that discharges water and gas, one end connected to the drainage / exhaust device 41, and the other end opened between the first packer 11 and the second packer 12. A drainage exhaust line 42 for draining and exhausting, and a valve 43 provided in the drainage exhaust line 42 for opening and closing the drainage exhaust line 42 are provided. The drainage / exhaust line 42 extends through the first packer 11 and is independent of the supply / discharge lines 14 and 15A of the packer device 1A.

  Next, a pipe water stopping method using the second embodiment of the packer water stopping device of the present invention will be described with reference to FIG. In the present embodiment, as in the example of the pipe water stopping method according to the first embodiment, a case where water is stopped at the portion of the vertical pipe 102b below the leakage location of the groundwater flow W will be described.

  First, a part of piping is temporarily stopped by the packer device 1A. Specifically, by operating the supply / discharge device 13A of the packer device 1A shown in FIG. 8, the first supply / discharge line 14 and the first packer 11 and the second packer 12 arranged in the vertical pipe 102b are connected. Fluids are respectively supplied through the second supply / discharge lines 15A, and the first packer 11 and the second packer 12 are expanded simultaneously or at different timings. Working time can be shortened by inflating at the same time. Due to the expansion of the first packer 11 and the second packer 12, water is temporarily stopped at the first packer 11, and the first packer 11, the second packer 12, and the vertical piping 102b between them. An intermediate region S is defined by the inner wall of the. At this time, leaked water and air may exist in the intermediate region S.

  Next, the pressurization system 2 determines whether or not the water stoppage by the packer device 1A is good. In the present embodiment, dry gas is supplied to the intermediate region S by operating the pressurization device 21 of the pressurization system 2 with the valve 43 of the drainage exhaust system 4 being opened. Thereby, the leaked water and air existing in the intermediate region S are discharged to the outside through the drainage exhaust line 42, and the inside of the intermediate region S is replaced with dry gas. At this time, the replacement with the dry gas in the intermediate region S can be promoted by operating the drainage exhaust device 41.

  After replacing the inside of the intermediate region S with dry gas, the drainage exhaust line 42 is closed and the intermediate region S is pressurized by closing the valve 43 while maintaining the supply of gas from the pressurizing device 21. The procedure of the method for determining the quality of the water stop after pressurizing the intermediate region S is the same as that of the pipe water stop method according to the first embodiment described above. In the present embodiment, since the intermediate region S becomes a single-phase state of dry gas due to the discharge of leaked water and air in the intermediate region S, the detected pressure of the pressure gauge 23 is immediately stabilized when the valve 43 is closed. To do. Therefore, the quality determination of the water stoppage of the packer device 1A can be performed earlier than in the case of the first embodiment. That is, in the pipe water stop method according to the first embodiment, whether or not the water stop is good is determined by whether or not the detection signal of the pressure gauge 23 reaches the upper limit set value Pu within the set time Tj. In the pipe water stopping method according to, this set time Tj can be set shorter than in the case of the first embodiment.

  When it is determined that the water stoppage by the packer device 1A is incomplete, the first packer 11 and the second packer 12 are contracted and re-expanded in order, or the first packer 11 and the second packer 12 are The packer 12 is contracted, pulled out from the pipe 102b, reinserted into the pipe 102b, and re-expanded. Then, the quality of the water stop by the packer apparatus 1A is determined again.

  Specifically, first, the supply / discharge device 13A is operated, and the second packer 12 is once contracted and re-expanded while the first packer 11 is expanded. This is because when the first packer 11 and the second packer 12 are first expanded, there is a flow of leaked water in the vertical pipe 102b, so that the first packer 11 and the second packer 12 have a flow force. This is because of the possibility of non-uniform expansion. On the other hand, in this operation, the flow in the vertical pipe 102b is greatly weakened by the expanded first packer 11. For this reason, the possibility that the second packer 12 is evenly expanded and the contact surface with the vertical pipe 102b can be completely closed is increased.

  Next, while the second packer 12 is expanded, the first packer 11 is once contracted and then re-expanded. If the water stoppage by the second packer 12 is good, there is no flow in the vertical pipe 102b. Therefore, the first packer 11 does not receive the flow force even if it exists in the water. Therefore, there is an increased possibility that the first packer 11 is evenly expanded and the contact surface with the vertical pipe 102b can be completely closed.

  In addition, the first packer 11 can be contracted and re-expanded first, and then the second packer 12 can be contracted and re-expanded. Even in such a case, since the flow in the vertical pipe 102b becomes weak, the first packer 11 and the second packer 12 are unlikely to receive the flow force.

  In this way, when the first water stop by the packer device 1A is incomplete and the water stops again, by contracting the other while keeping either the first packer 11 or the second packer 12 inflated, It is easy to inflate the first packer 11 and the second packer 12 equally. As a result, an incomplete water stop condition can be easily improved.

  When it is determined that the water stoppage by the packer device 1A is good, the upper surface of the first packer 11 and the vertical pipe 102b are formed as in the example of the pipe waterstop method according to the first embodiment described above. The water stop material M is injected into the portion of the weir by the water stop material injection device 31. Since the injected water-stopping material M is solidified in a stationary state with no flow, it is possible to reliably stop a part of the vertical pipe 102b.

  According to the above-described second embodiment of the packer water stop device of the present invention and the pipe water stop method, the same effects as those of the above-described first embodiment can be obtained.

  Moreover, according to this Embodiment, the packer water stop apparatus has at least the waste_water | drain exhaust line 42 and the valve 43 as the waste_water | drain exhaust system 4 which discharges the water and gas which exist in the intermediate | middle area | region S outside. Therefore, the intermediate region S can be replaced with a single phase state of dry gas. Therefore, the settling time of the pressure detected by the pressure gauge 23 is shortened compared to the case of the first embodiment, and as a result, the quality of water stoppage by the packer device 1A can be determined earlier than in the case of the first embodiment. .

[Third Embodiment]
Next, a third embodiment of the packer water stop device of the present invention and its pipe water stop method will be described with reference to FIG.
FIG. 9 is a schematic configuration diagram showing a third embodiment of the packer water stop device of the present invention. In FIG. 9, the same reference numerals as those shown in FIGS. 1 to 8 are the same parts, and detailed description thereof is omitted.

  The third embodiment of the packer water stop device of the present invention and its pipe water stop method shown in FIG. 9 are an example of the pipe water stop method of the first embodiment for stopping water in the middle of the vertical pipe 102, and Unlike the case of the pipe water stop method of the second embodiment or the other example of the pipe water stop method of the first embodiment in which water is stopped at the joint between the vertical pipe 102 and the horizontal pipe 101, the horizontal Water is stopped in the middle of the pipe 101. Such a water stop location allows, for example, the leakage water from the groundwater flow W to flow into the upstream side (left side in FIG. 9) of the horizontal pipe 101, but is connected to a sewage treatment facility (not shown). This is assumed when it is necessary to prevent inflow to the downstream side (right side in FIG. 9).

The differences between the configuration of the packer water stop device of the present embodiment and the packer water stop device of the first embodiment are as follows.
First, the packer apparatus 1 according to the first embodiment includes two packers each composed of the first and second packers 11 and 12 (see FIG. 2). The packer device 1B of the form packer water stop device includes four packers that are configured by the first, second, third, and fourth packers 11, 12, 16, and 17 and that are connected at intervals. Yes. The packer device 1B includes a first supply / discharge line 14 connected to the supply / discharge device 13 and the first packer 11, and a second supply / discharge connection connected to the first packer 11 and the second packer 12. A fourth supply / discharge line connected to the line 15, a third supply / discharge line 18 connected to the second packer 12 and the third packer 16, and a third supply / discharge line connected to the third packer 16 and the fourth packer 17. Line 19. These four supply / discharge lines 14, 15, 18, and 19 are lines for simultaneously supplying and discharging fluid to and from the four packers 11, 12, 16, and 17.

  Second, the pressurization system 2 of the first embodiment pressurizes the intermediate region S defined by the first and second packers 11 and 12 and the inner wall of the vertical pipe 102b therebetween. The quality of water stoppage by the first and second packers 11 and 12 is determined (see FIG. 2). On the other hand, the pressurization system 2B according to the present embodiment pressurizes the first intermediate region S1 defined by the first and second packers 11 and 12 and the inner wall of the horizontal pipe 101 therebetween. And determining whether or not the first and second packers 11 and 12 are water-stopped, and the second and second packers 16 and 17 and the inner wall of the horizontal pipe 101 between them are defined by the second The intermediate region S2 is pressurized to determine whether or not the third and fourth packers 16 and 17 are stopped.

  Specifically, the pressurization system 2B includes a pressurization device 21B having two pressurization pumps 25, one end connected to the pressurization device 21B, and the other end to the first packer 11 and the second packer 12. The first pressure line 22 that opens between the first pressure line 22, the first pressure gauge 23 provided on the pressure device 21 </ b> B side in the first pressure line 22, and one end connected to the pressure device 21 </ b> B. A second pressure line 28 having the other end opened between the third packer 16 and the fourth packer 17, and a second pressure line 28 provided on the pressure device 21B side in the second pressure line 28. And a pressure gauge 29. The pressurizing device 21B is the same as the pressurizing device 21 of the first embodiment except for the number of pressurizing pumps 25. The first pressure line 22 extends through the first packer 11. The second pressure line 28 extends through the first, second and third packers 11, 12, 16. The first and second pressure gauges 23 and 29 detect the gas pressure in the first and second pressurization lines 22 and 28, respectively, and output a detection signal corresponding to the detected pressure to the pressurization device 21B. To do.

  Third, unlike the first embodiment, the packer water stop device of the present embodiment is defined by the second packer 12 and the third packer 16 and the inner wall of the horizontal pipe 101 therebetween. A water stop material injection line 32B for injecting the water stop material M into the third intermediate region S3 is further provided. One end of the water stop material injection line 32 </ b> B is opened between the second packer 12 and the third packer 16, and extends through the first and second packers 11 and 12. The other end of the water stop material injection line 32B is connected to the water stop material injection device 31 at the time of water stop material injection.

  Fourthly, unlike the first embodiment, the packer water stop device of the present embodiment includes a drainage exhaust line 52 for discharging water and air (gas) present in the third intermediate region S3. In addition. One end of the drainage / exhaust line 52 opens between the second packer 12 and the third packer 16, and extends through the first and second packers 11 and 12. The other end of the drainage / exhaust line 52 is connected to a drainage / exhaust device 51 that drains and exhausts the other end when the water stop material is injected.

  The packer water stop device of the present embodiment temporarily stops the flow of the horizontal pipe 101 by the first and second packers 11 and 12 and also stops the water by the third and fourth packers 16 and 17. The injection space for the material M, that is, the third intermediate region S3 is secured.

Next, a pipe water-stop method in the third embodiment of the packer water-stop device of the present invention will be described with reference to FIG.
First, a part of the horizontal pipe 101 is temporarily stopped by the packer device 1B. Specifically, by operating the supply / discharge device 13 of the packer device 1B shown in FIG. 9, the fluid is supplied through the first to fourth supply / discharge lines 14, 15, 18, 19, and the horizontal pipe 101 The 1st thru | or 4th packer 11, 12, 16, 17 arrange | positioned inside is expanded simultaneously. Thereby, the water is temporarily stopped at the position of the first packer 11. Further, the first intermediate region S1 is formed by the first and second packers 11 and 12 and the inner wall of the horizontal pipe 101 therebetween, and the third and fourth packers 16 and 17 and the horizontal pipe 101 between them. The second intermediate region S2 is defined by the inner wall of the first and third intermediate regions S3 by the second and third packers 12 and 16 and the inner wall of the horizontal pipe 101 therebetween.

  Next, it is determined by the pressurization system 2B whether or not the water stoppage by the packer device 1B is good. In the present embodiment, the quality of the water stoppage is determined from the pressure states of both the first intermediate region S1 and the second intermediate region S2.

  Specifically, by operating the pressurization device 21B, gas is supplied via the first and second pressurization lines 22 and 28, and the first intermediate region S1 and the second intermediate region S2 are added. Press. As a result of the pressurization, when the pressures of both the first intermediate region S1 and the second intermediate region S2 rise above a predetermined pressure, that is, the first and second pressure gauges 23 and 29 detect the first pressure. When both the detected pressures (detection signals) in the first and second pressurization lines 22 and 28 reach the pressure target value (upper limit set value Pu), it is determined that the water stoppage by the packer device 1B is good. On the other hand, when the pressure of at least one of the first intermediate region S1 and the second intermediate region S2 does not reach a predetermined pressure, that is, the detected pressure detected by the first and second pressure gauges 23 and 29. If at least one of the detection signals does not reach the pressure target value (upper limit set value Pu), it is determined that the water stoppage by the packer device 1B is incomplete.

  When it is determined that the water stoppage by the packer device 1B is good, the portion of the weir formed by the second packer 12 and the third packer 16 and the horizontal pipe 101 therebetween, that is, the third packer The water stop material M is injected into the intermediate region S3 by the water stop material injection device 31 through the water stop material injection line 32B. However, since the third intermediate region S3 is a sealed space, the water and wet air in the third intermediate region S3 are discharged by the drainage exhaust device 51 via the drainage exhaust line 52. Since the injected water-stopping material M is solidified in a stationary state with no flow, it is possible to reliably stop the middle part of the horizontal pipe 101.

  On the other hand, when it is determined that the water stoppage by the packer device 1B is incomplete, the waterstop material M is not injected into the third intermediate region S3, and the first to fourth packers 11, 12, 16 and 17 are sequentially contracted and re-expanded, or the first to fourth packers 11, 12, 16, and 17 are contracted, extracted from the pipe 100, reinserted into the pipe 100, and re-expanded in order. . Then, it is re-determined by the pressurization system 2B whether the water stop by the packer apparatus 1B is good. The specific method is substantially the same as the case of the example of the pipe water stopping method of the first embodiment.

  According to the above-described third embodiment of the packer water stop device of the present invention and the pipe water stop method, the first and second packers 11 and 12 and the first wall defined by the inner wall of the horizontal pipe 101 are used. The first and second pressurization lines 22 represent the pressurization state of the second intermediate region S2 defined by the intermediate region S1, the third and fourth packers 16 and 17 and the inner wall of the horizontal pipe 101, respectively. Therefore, it is possible to accurately determine whether or not the water is stopped by the packer device 1B at a remote place without approaching the pipe such as the horizontal pipe 101.

  Further, according to the present embodiment, the packer water stop device applies the water stop material M to the third intermediate region S3 defined by the second and third packers 12 and 16 and the inner wall of the horizontal pipe 101. Since the water stop material injection line 32B for pouring and the drainage exhaust line 52 for draining and exhausting from the third intermediate region S3 are provided, it is possible to reliably stop the middle position of the horizontal pipe 101. .

  In addition, the supply / exhaust line, the pressurization line, the drainage exhaust line, and the water stop material injection line shown in FIG. 2 to FIG. However, it is possible to configure these lines to extend to remote locations.

[Other embodiments]
In the 1st thru | or 3rd embodiment of the packer water stop apparatus and piping water stop method of this invention mentioned above, although the sewer pipe 100 was mentioned as an example as a water stop object, this invention is other than the sewer pipe 100. It can also be applied to water stopping various pipes.

  Moreover, in embodiment mentioned above, the pressurization apparatus 21, 2B of the pressurization system 2, 2B detects the pressure gauge 23 whether the temporary water stop by the packer apparatus 1, 1A, 1B is favorable. Although an example in which the determination is made based on the signal has been shown, it is also possible for the operator to determine the quality of the water stop by visually checking the detected pressure of the pressure gauge 23.

  In the embodiment described above, pressure gauges 23 and 29 provided in the pressurization lines 22 and 28 are used as a method for determining whether or not the temporary water stoppage by the packer apparatuses 1, 1 </ b> A, and 1 </ b> B is good. An example of determination based on the detected pressure was shown. On the other hand, it is possible to determine whether the water stop is good or not by providing the pressurization lines 22 and 28 with a branch line having a larger flow resistance than the pressurization lines 22 and 28 and providing a flow meter on the branch line. Is possible. When the water stoppage by the packer devices 1, 1A, 1B is good, the pressure of the pressurization lines 22, 28 increases, so the amount of gas flowing from the pressurization devices 21, 21B into the branch line increases. The detected flow rate of the flow meter increases. On the other hand, when the water stoppage is incomplete, the pressures of the pressurization lines 22 and 28 do not increase, so the amount of gas flowing into the branch line does not increase and the flow rate detected by the flow meter does not change. That is, the branch line and the flow meter function as a pressure state detection unit that detects a physical quantity corresponding to the pressure state of the pressurization lines 22 and 28, similarly to the pressure gauge 23.

  Further, in the second embodiment described above, an example in which the drainage exhaust system 4 is separated from the pressurization system 2 is shown, but a configuration in which the drainage exhaust system 4 is integrated with the pressurization system 2 is also possible. . For example, the pressurization system 2 is configured to further include a drainage exhaust line 42 connected to the pressurization device 21 and a valve 43 provided in the drainage exhaust line 42, and the drainage exhaust device 41 is omitted. Thereby, simplification of a structure can be achieved.

  In the second embodiment described above, an example in which the drainage exhaust system 4 for discharging water and gas existing in the intermediate region S is shown, but also in the packer water stop device of the first embodiment. It is possible to provide such a drainage exhaust system.

  In addition, as an example of stopping the joint between the horizontal pipe 101 and the vertical pipe 102b, a method using two sets of the packer device 1 and the pressurization system 2 of the first embodiment has been shown. A method using two combinations of the packer device 1A and the pressurization system 2 of the embodiment is also possible.

  Note that the present invention is not limited to the first to third embodiments described above, and includes various modifications. The above-described embodiment has been described in detail for easy understanding of the present invention, and is not necessarily limited to the one having all the configurations described. For example, part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of one embodiment. Moreover, it is also possible to add, delete, or replace another configuration for a part of the configuration of each embodiment.

DESCRIPTION OF SYMBOLS 11 ... 1st packer, 12 ... 2nd packer, 13 ... Feeding / discharging apparatus, 14 ... 1st feeding / discharging line, 15, 15A ... 2nd feeding / discharging line, 16 ... 3rd packer, 17 ... 1st 4 packers, 18 ... third supply / discharge line, 19 ... fourth supply / discharge line, 21, 21B ... pressure device, 22 ... (first) pressure line, 23 ... (first) pressure gauge ((First) pressure state detection unit), 28 ... second pressurization line, 29 ... second pressure gauge (second pressure state detection unit), 42 ... drainage exhaust line, 43 ... valve, 32B ... Water stop material injection line, 52 ... Drainage exhaust line, 100 ... Sewer pipe (pipe), 101 ... Horizontal pipe (pipe), 102b ... Vertical pipe (pipe)

Claims (14)

A packer water stop device that stops the flow in the pipe,
A first packer and a second packer that are spaced apart from each other, expand by supply of fluid and contract by discharge of fluid, and are disposed in the pipe;
A supply / discharge device for supplying and discharging fluid to and from the first packer and the second packer;
A supply / discharge line for supplying and discharging fluid to and from the first packer and the second packer;
A pressurizing device for supplying gas;
A pressure line having one end connected to the pressure device and the other end opened between the first packer and the second packer;
A packer water stop device, comprising: a pressure state detection unit that is provided in the pressure line and detects a physical quantity corresponding to a pressure state of the pressure line. The packer water stop device according to claim 1,
The pressure state detection unit is a pressure gauge that detects the pressure of the pressurization line,
The pressurizing device determines whether or not the water stoppage by the first packer and the second packer is good based on the pressure detected by the pressure gauge. apparatus. The packer water stop device according to claim 2,
The pressurizing device compares a detection signal corresponding to the pressure detected by the pressure gauge within a preset setting time with a preset set value, and the detection signal reaches the preset value at least once. When the water stoppage by the first packer and the second packer is determined to be good while the detection signal does not reach the set value, the first packer and the second packer The packer water stop device characterized by determining that the water stop by is incomplete. In the packer water stop apparatus according to any one of claims 1 to 3,
The supply / discharge line is
A first supply / discharge line having one end connected to the supply / discharge device and the other end connected to the first packer;
One end of the packer water stop device is configured to be connected to the first packer and the other end is connected to the second packer. In the packer water stop apparatus according to any one of claims 1 to 3,
The air supply / exhaust line is
A first supply / discharge line having one end connected to the supply / discharge device and the other end connected to the first packer;
A packer water stop device characterized in that one end is connected to the supply / discharge device and the other end is connected to a second supply / discharge line connected to the second packer. In the packer water stop apparatus according to any one of claims 1 to 3,
A drainage exhaust line for draining and exhausting one end of which opens between the first packer and the second packer;
The packer water stop device further comprising a valve provided in the drainage exhaust line and opening and closing the drainage exhaust line. A packer water stop device that stops the flow in the pipe,
A first packer, a second packer, a third packer, and a fourth packer that are spaced apart from each other, expand by supply of fluid and contract by discharge of fluid, and are disposed in the pipe;
A supply / discharge device for supplying and discharging fluid to and from the four packers;
A supply / discharge line for supplying and discharging fluid to and from the four packers;
A pressurizing device for supplying gas;
A first pressure line having one end connected to the pressure device and the other end opened between the first packer and the second packer;
A second pressure line having one end connected to the pressure device and the other end opened between the third packer and the fourth packer;
A first pressure state detection unit that is provided in the first pressure line and detects a physical quantity according to the pressure state of the first pressure line;
A second pressure state detection unit that is provided in the second pressure line and detects a physical quantity according to the pressure state of the second pressure line;
A drainage exhaust line for draining and exhausting one end of which opens between the second packer and the third packer;
A packer water stop device comprising: a water stop material injection line for injecting a water stop material, one end of which is opened between the second packer and the third packer. A piping water stopping method for stopping a flow in a pipe,
Temporary stop for temporarily stopping the flow in the pipe by inserting the two or four packers of the packer apparatus having two or four packers connected at a distance from each other into the pipe for expansion. Water process,
Gas is supplied to the intermediate region defined by the two or four packers expanded in the temporary water stop process and the inner wall of the piping between them via a pressure line to add the intermediate region. A pressing step for pressing,
A pressure state detection step of detecting a physical quantity according to the pressure state of the pressure line;
Based on the physical quantity detected in the pressure state detection step, a water stop state determination step for determining whether water stop by the packer device is good,
A water stop material injection step of injecting a water stop material into a temporary water stop location in the pipe after determining that the water stop by the packer device is good in the water stop state determination step. Piping water stop method. In the pipe water stop method according to claim 8,
When it is determined that the water stoppage by the packer device is incomplete in the water stop state determination step,
Packer that sequentially contracts and re-expands the double or quadruple packer, or sequentially contracts, pulls out from the pipe, reinserts into the pipe, and re-expands. Re-watering process,
A piping water stop method, further comprising: a water stop state re-determination step in which the pressurization step, the pressure state detection step, and the water stop state determination step are executed again. In the piping water stop method according to claim 9,
The packer device is a packer device having two packers,
In the packer re-watering step, one of the two packers is first contracted and re-expanded, and then the other packer is contracted and re-expanded. . In the piping water stop method according to any one of claims 8 to 10,
The pressure state detection step detects the pressure of the pressurization line with a pressure gauge provided in the pressurization line,
The water stoppage state determining step compares the pressure detected by the pressure gauge with a preset set value within a preset set time, and if the detected pressure reaches the preset value, the packer While determining that the water stop by an apparatus is favorable, it determines with the water stop by the said packer apparatus being incomplete otherwise, The piping water stop method characterized by the above-mentioned. In the piping water stop method according to any one of claims 8 to 10,
Prior to the pressurization step, the pipe water stop method further comprises a drainage exhaust step for discharging water and gas existing in the intermediate region defined in the temporary water stop step to the outside. In the pipe water stop method according to claim 8,
Two sets of packer devices having the two packers are provided,
In the temporary water stop step, of the two sets of packer devices, the two packers of one packer device are inserted into the pipe and expanded, and the two packers of the other packer device are expanded to the one packer device. Inserted into the pipe on the downstream side of the two packers of the apparatus and inflated, temporarily stopped the flow in the pipe,
The pressurizing step, the pressure state detecting step, and the water stop state determining step are respectively performed on the two sets of packer devices,
In the water-stopping material injecting step, after determining that the water-stopping by the two sets of packer devices is good in the water-stopping state determining step, the double packer and the other packer device of the one packer device A piping waterproofing method, wherein a waterproofing material is injected into a weir formed by the two packers of the above and the piping. In the pipe water stop method according to claim 8,
The packer device is a packer device having four packers composed of a first packer, a second packer, a third packer, and a fourth packer,
In the pressurizing step, gas is supplied to a first intermediate region defined by the first packer and the second packer and an inner wall of the pipe between them through a first pressurization line. And supplying gas through a second pressurization line to a second intermediate region defined by the third packer and the fourth packer and the inner wall of the pipe between them. , Pressurizing each of the first intermediate region and the second intermediate region,
The pressure state detection step detects physical quantities corresponding to the pressure states of the first pressure line and the second pressure line,
In the water stop state determination step, the quality of water stoppage by the first packer and the second packer, the third packer and the fourth packer are determined based on the physical quantities detected in the pressure state detection step, respectively. Judge the quality of water stoppage by the packer,
In the water stop material injection step, the water stop by the first packer and the second packer and the water stop by the third packer and the fourth packer are good in the water stop determination step, respectively. After determining that there is a water-stopping material, a water-stopping material is injected into a third intermediate region formed by the second packer, the third packer, and the pipe.

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