JP2009083353A - Concrete placing management method and concrete placing management system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a concrete placing management method and a concrete placing management system, by which concrete placing can be managed so that concrete can be surely placed in a concrete placing space densely. <P>SOLUTION: Using a sensor 2 disposed above a concrete placing space 1b, the distance of a concrete face C1 displaced from a lower position to a higher position during the placing of the concrete C is measured. Using a calculation display device 3 that has received a measurement value output from the sensor 2, the height T1 of the concrete is calculated based on the measurement value and it is displayed in real time. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a concrete placement management method and a concrete placement management system for placing concrete concretely in a concrete placement space.

  Since it has many advantages such as S-structure, RC-structure, and SRC-structure, it has excellent seismic performance and fire-resistance performance. Filled Steel Tube: Concrete filled steel tube structure) is increasingly used.

  For example, when constructing a CFT column that uses CFT construction as a building column, a treme tube or a pressure feed tube is inserted into the steel pipe from the top (column top) as a method of filling the steel tube with concrete. A drop-filling method in which concrete is placed and placed, or a pressure feed pipe is connected to the pressure inlet formed on the lower end side (column base) of the steel pipe, and the concrete is continuously applied from the lower end side of the steel pipe by a concrete pump or the like. A press-fitting method is used, in which it is press-fitted into and placed.

  In the construction of such a CFT column, in general, when a concrete pipe is provided with a diaphragm, in particular, when a concrete pipe is continuously placed, the height of one casting is increased compared to other concrete structures. When the driving speed is increased, air accumulation is likely to occur and material separation is likely to occur. Moreover, if the casting speed is slowed down, the fluidity of the concrete will be lowered, and it will no longer be possible to fill it with solidity. For this reason, when concrete is placed using the press-fitting method, for example, setting a casting speed of about 1 m / min as a reference, and placing the concrete while ensuring this set speed is a CFT pillar. It is important to ensure the performance of

  Conventionally, in the press-fitting method, when concrete is placed inside the steel pipe, the steel pipe is struck, the concrete is pressed into the concrete, and the upper and lower sounds are struck with the concrete surface displaced (up) from below. Due to the difference, that is, the difference in the sound of the part where the concrete inside the steel pipe is not placed and the part where the concrete is placed, the concrete is filled inside the steel pipe and rises soundly according to the predetermined placement speed. I try to make sure.

On the other hand, for example, Patent Document 1 discloses a method of placing high-fluidity concrete in a mold, and in this method, a plurality of laser displacement meters (laser distance meters) arranged along the upper side of the mold are used. A plurality of load cells embedded side by side at the bottom of the formwork are used as sensors, and when concrete is placed, the output from these sensors is input to a controller (PC), and the flow rate of the concrete ( The casting speed is calculated. When the calculated flow rate is outside the allowable flow rate range, the pressure of the placer that supplies the concrete is adjusted to adjust the inflow amount of the concrete to ensure the quality of the concrete (concrete product). ing.
JP 11-34030 A

  However, especially in the construction of CFT pillars, since the construction manager cannot see the concrete placed in the steel pipe from the outside, the steel pipe is hit and the concrete is not placed as described above. The concrete placement management is performed according to the difference in the sound of the portion where the concrete is placed. However, in this type of sound management, the concrete is pressed and the concrete is displaced from the bottom to the top every moment. Since it is impossible to accurately grasp the position of the surface (concrete height), it is difficult to accurately determine whether concrete is densely filled or not. There was a problem that was difficult.

  For this reason, there has been a strong demand for a method capable of confirming in real time the height of concrete that is pressed into the concrete and that is displaced every moment.

  In view of the above circumstances, the present invention is capable of confirming the height of concrete to be placed in a concrete placement space in real time, and performing concrete placement management so as to reliably place concrete densely. An object is to provide a concrete placement management method and a concrete placement management system.

  In order to achieve the above object, the present invention provides the following means.

  The concrete placement management method of the present invention is a concrete placement management method for placing concrete densely in a concrete placement space, wherein a sensor disposed above the concrete placement space is used to control the concrete. Measure the distance from the concrete surface that is displaced from the bottom to the top when placing, and calculate the concrete height based on the measurement value and display it in real time by the calculation display device that receives the measurement value output from the sensor. It is characterized by making it.

  In the present invention, a concrete is placed in the concrete placement space, and the distance from the concrete surface displaced upward from below is measured by a sensor, and an arithmetic display device such as a personal computer is used based on the measurement value measured by this sensor. Since the concrete height calculated in step 1 is displayed in real time, for example, even in the construction of a CFT column where the concrete placed in the steel pipe cannot be seen from the outside, the concrete is placed while checking the concrete height display. It becomes possible to maintain the quality of concrete reliably by installing.

  At this time, the concrete placement management can be more reliably performed by displaying the height of the concrete that changes every moment with the placement of the concrete by graphing and displaying the height on the calculation display device. Furthermore, by storing the measured value output from the sensor with the calculation display device, the construction record can be automatically left, and the measurement history (construction history) can be displayed as a graph immediately. become.

  In the concrete placement management method of the present invention, it is desirable to use a laser distance meter for the sensor.

  In the present invention, by using a laser distance meter as a sensor, it is possible to measure the distance from the concrete surface with high accuracy and to obtain an accurate concrete height.

  Furthermore, in the concrete placement management method of the present invention, it is more desirable to calculate the concrete placement speed based on the measured value by the calculation display device and display it in real time.

  In this invention, it is possible to manage the placement speed by calculating the concrete placement speed based on the measured value of the sensor and displaying it in real time together with the concrete height. As a result, when the concrete casting speed increases even though the concrete is cast at a predetermined casting speed, the increase in the casting speed causes, for example, a diaphragm of a steel pipe of a CFT column. Therefore, it is possible to detect that air is trapped, and it is possible to perform construction while maintaining the quality of concrete more reliably.

  In the concrete placement management method of the present invention, it is further preferable that the arithmetic display device issues a warning when the placement speed is out of a preset allowable range.

  In the present invention, when the driving speed falls outside the allowable range of the desired driving speed (set speed), a warning is displayed on the calculation display device or a warning sound is emitted from the calculation display device. It becomes possible to place concrete while reliably maintaining the quality of the concrete.

  The concrete placement management system of the present invention is a concrete placement management system for placing concrete concretely in a concrete placement space, and is disposed above the concrete placement space, and the concrete placement management system. A sensor that measures the distance from the concrete surface that sometimes displaces from below to above, a calculation display device that receives the measurement value output from the sensor, calculates the concrete height based on the measurement value, and displays it in real time; It is characterized by providing.

  In the present invention, a concrete is placed in the concrete placement space, and the distance from the concrete surface displaced upward from below is measured by a sensor, and an arithmetic display device such as a personal computer is used based on the measurement value measured by this sensor. Since the concrete height calculated in step 1 is displayed in real time, for example, even in the construction of a CFT column where the concrete placed in the steel pipe cannot be seen from the outside, the concrete is placed while checking the concrete height display. It becomes possible to maintain the quality of concrete reliably by installing.

  At this time, the concrete placement management can be more reliably performed by displaying the height of the concrete that changes every moment with the placement of the concrete by graphing and displaying the height on the calculation display device. Furthermore, by storing the measured value output from the sensor with the calculation display device, the construction record can be automatically left, and the measurement history (construction history) can be displayed as a graph immediately. become.

  In the concrete placement management system of the present invention, the sensor is preferably a laser distance meter.

  In the present invention, by using a laser distance meter as a sensor, it is possible to measure the distance from the concrete surface with high accuracy and to obtain an accurate concrete height.

  Furthermore, in the concrete placement management system of the present invention, it is more preferable that the calculation display device is configured to calculate the concrete placement speed based on the measurement value and display it in real time.

  In this invention, it is possible to manage the placement speed by calculating the concrete placement speed based on the measured value of the sensor and displaying it in real time together with the concrete height. As a result, when the concrete casting speed increases even though the concrete is cast at a predetermined casting speed, the increase in the casting speed causes, for example, a diaphragm of a steel pipe of a CFT column. Therefore, it is possible to detect that air is trapped, and it is possible to perform construction while maintaining the quality of concrete more reliably.

  In the concrete placement management method of the present invention, it is further desirable that the calculation display device is configured to issue a warning when the placement speed is out of a preset allowable range.

  In the present invention, when the driving speed falls outside the allowable range of the desired driving speed (set speed), a warning is displayed on the calculation display device or a warning sound is emitted from the calculation display device. It becomes possible to place concrete while reliably maintaining the quality of the concrete.

  According to the concrete placement management method and the concrete placement management system of the present invention, since the concrete height is displayed on the arithmetic display device in real time, for example, the CFT in which the concrete placed in the steel pipe cannot be seen from the outside. Even in the construction of pillars, it is possible to maintain the quality of concrete by placing concrete while checking the concrete height indication, and realize rational construction by automation and labor saving. It becomes possible to do.

  Hereinafter, a concrete placement management method and a concrete placement management system according to an embodiment of the present invention will be described with reference to FIG. This embodiment is a concrete placement management method and a concrete placement management system for placing concrete concretely in a steel pipe (concrete placement space) when constructing a pillar (CFT pillar) of a CFT building. It is about.

  As shown in FIG. 1, the concrete placement management system A of the present embodiment is output from a laser distance meter (sensor) 2 fixed by means of appropriate means on the upper end side (column top 1a) of the steel pipe 1 and the laser distance meter. And a personal computer (arithmetic display device) 3 provided with a receiver 3a for wirelessly receiving the measured values.

  The laser distance meter 2 is provided so as to irradiate the laser L in the steel pipe 1 (concrete placing space 1b) and in a vertical direction from the column top 1a to the column bottom 1c of the steel tube 1. Further, the laser distance meter 2 includes a concrete surface C1 that press-fits concrete C sequentially into the interior 1b of the steel pipe 1 from a pressure inlet (not shown) formed on the lower end side (column base) of the steel pipe 1 and is displaced upward from below. And measure the distance.

  On the other hand, the personal computer 3 receives and inputs the measurement value output from the laser distance meter 2 by the receiver 3a, and stores this, and stores this measurement value and the steel pipe 1 (concrete casting space 1b) input in advance. ) To calculate the concrete height T1 and display it on the display unit 3b in real time. At this time, the personal computer 3 is preliminarily input with the relative position of the laser distance meter 2 with respect to the column top 1a of the steel pipe 1, and the measured value input from the laser distance meter 2 is based on the relative position of the laser distance meter 2. The actual distance T2 from the column top 1a to the concrete surface C1 is calculated by correction, and the concrete height T1 is calculated based on the actual distance T2 and displayed in real time. Further, from the actual distance T2 to the concrete surface C1 and the shape of the steel pipe 1, the position (concrete height T1) of the concrete surface C1 that changes every moment during concrete placement is graphed (as graph G shown in FIG. 1). )indicate.

  Moreover, in this embodiment, the concrete C casting speed is calculated by the personal computer 3 based on the measurement value output from the laser rangefinder 2 and the shape dimensions of the steel pipe 1 previously input. 3 (not shown in FIG. 1). Furthermore, when the placement speed calculated by the personal computer 3 deviates from the permissible range of the concrete C placement speed (set speed) set in advance by inputting it into the personal computer 3, it is immediately A warning means (not shown) for displaying a warning to notify this on the display unit 3b of the personal computer 3 or generating a warning sound is provided.

  When the concrete C is placed in the interior 1b of the steel pipe 1 using the concrete placement management system A of this embodiment, the concrete C is press-fitted from the pressure inlet into the interior 1b of the steel pipe 1 with a concrete pump, for example. At the same time, the distance between the concrete surface C1 and the laser rangefinder 2 that are displaced upward from below is measured, and this measured value is input to the personal computer 3 in real time through the receiver 3a.

  And based on the measured value sent from the laser distance meter 3, the concrete height T1 is calculated | required, and real distance T2 from the column top part 1a to the concrete surface C1 with this concrete height T1 is real time and the display part of the personal computer 3 3b. Furthermore, from the concrete height T1 and the actual distance T2, the range of the placed concrete C and the remaining space of the steel pipe 1 (concrete height T1 and actual distance T2) are graphed in real time so that they can be confirmed at a glance, The concrete C placing speed is displayed.

  As a result, the construction manager can also display on the display 3b of the personal computer 3 (concrete height T1 and concrete) even in the construction of a CFT column in which the concrete C placed in the inside 1b of the steel pipe 1 cannot be seen from the outside. It is possible to easily determine whether or not the concrete C is densely placed in the inside 1b of the steel pipe 1 by placing the concrete C while confirming the C placing speed). Further, it can be understood by checking the display portion 3b of the personal computer 3 that the concrete C is placed in a portion such as a diaphragm where a filling failure such as air accumulation is likely to occur. Further, at this time, if the calculated concrete C placement speed increases despite the concrete C being placed at a predetermined placement speed, the increase in the placement speed causes the CFT column It is possible to detect that air is trapped by the diaphragm of the steel pipe 1 or the like. Therefore, it is possible to rationally determine whether or not the concrete C is firmly placed in the inside 1b of the steel pipe 1 by automation and labor saving.

  Further, in this embodiment, for example, when the setting speed calculated by the personal computer 3 is out of the allowable range with respect to the preset concrete C setting speed of about 1 m / min, the warning of the personal computer 3 is immediately issued. A warning is displayed on the display unit 3b or a warning sound is emitted by the means. For this reason, the construction manager can immediately grasp that the concrete C is not placed at an appropriate placement speed. As a result, it is possible to place concrete C at an appropriate placement speed at all times, and it is possible to immediately grasp that air is trapped.

  In addition, the measurement values sent from the laser distance meter 3 are sequentially stored in the personal computer 3 and the construction record is automatically saved, so that the measurement history (construction history) is displayed as a graph immediately. Is possible.

  Therefore, in the concrete placement management method and the concrete placement management system A according to the present embodiment, the concrete surface C1 that places concrete C in the steel pipe 1 (concrete placement space) 1b and is displaced upward from below is provided. Is measured by a laser distance meter (sensor) 2 and the concrete height T1 calculated by a personal computer (calculation display device) 3 based on the measured value is displayed in real time. Even in the construction of CFT columns where the concrete C to be seen cannot be seen from the outside, it is possible to reliably maintain the quality of the concrete C by placing the concrete C while confirming the indication of the concrete height T1. Become.

  At this time, by placing the concrete height T1 that changes every moment with the placement of the concrete C in a graph and displaying it on the personal computer 3, it is possible to perform the placement management of the concrete C more reliably. Furthermore, by storing the measured value output from the laser distance meter 2 in the personal computer 3, the construction record can be automatically left, and the measurement history (construction history) can be displayed as a graph immediately. It becomes possible.

  In addition, by using the laser distance meter 2 as a sensor for measuring the distance from the concrete surface C1, it is possible to measure the distance from the concrete surface C1 with high accuracy and to obtain an accurate concrete height T1. It becomes possible.

  Further, by calculating the concrete C casting speed based on the measurement value of the laser distance meter 2 and displaying it in real time together with the concrete height T1, it is possible to manage the casting speed. Thereby, even if the concrete C is placed at a predetermined placement speed, when the calculated concrete C placement speed increases, the increase in the placement speed causes the steel pipe 1 of the CFT column to It is possible to detect that air is trapped by a diaphragm or the like, and it is possible to perform construction while maintaining the quality of the concrete C more reliably.

  Further, at this time, when the driving speed is out of the allowable range of the desired driving speed (set speed), a warning is displayed on the display unit 3b of the personal computer 3 or a warning sound is generated, thereby further ensuring the operation. The concrete C can be placed while maintaining the quality of the concrete C.

  Therefore, according to the concrete placement management method and the concrete placement management system A of the present embodiment, the concrete height T1 is displayed on the personal computer 3 in real time, so the concrete C placed in the steel pipe 1 inside 1b is placed outside. Even in the construction of CFT pillars that cannot be seen from the concrete, the concrete C can be reliably filled into the inside 1b of the steel pipe 1 by placing the concrete C while confirming the indication of the concrete height T1. Thus, the quality of the concrete C can be ensured. Thereby, it becomes possible to install the personal computer 3 in a place away from the steel pipe 1 and perform the placement management of the concrete C, and it is possible to realize rational construction by achieving automation and labor saving.

  The embodiment of the concrete placement management system and the concrete placement management method according to the present invention has been described above. However, the present invention is not limited to the above-described embodiment, and may be changed as appropriate without departing from the scope of the present invention. Is possible. For example, in the present embodiment, the construction of the CFT pillar has been described as performing management when placing concrete C in the inside 1b of the steel pipe 1, but the concrete placing management system according to the present invention and The concrete placement management method may be applied when, for example, concrete C is densely filled into any concrete placement space 1b such as the inside of a mold for forming another concrete structure.

  In the present embodiment, the sensor that measures the distance from the concrete surface C1 that is displaced upward from below when the concrete C is placed is the laser distance meter 2, but other measuring means is employed as the sensor. May be.

It is a figure which shows the concrete placement management system which concerns on one Embodiment of this invention.

Explanation of symbols

1 Steel pipe 1a Column top 1b Inside of steel pipe (concrete placement space)
2 Laser distance meter (sensor)
3 PC (calculation display device)
3b Display part A Concrete placement management system C Concrete C1 Concrete surface G Graph T1 Concrete height L Laser

Claims (8)

A concrete placement management method for placing concrete densely in a concrete placement space,
By a sensor disposed above the concrete placement space, the distance from the concrete surface that is displaced upward from below when the concrete is placed is measured, and an arithmetic display device that receives the measurement value output from the sensor The concrete placement management method characterized in that the concrete height is calculated based on the measured value and displayed in real time. In the concrete placement management method according to claim 1,
A concrete placement management method using a laser distance meter for the sensor. In the concrete placement management method according to claim 1 or claim 2,
A concrete placement management method, wherein the concrete placement speed is calculated by the computation display device based on the measured value and displayed in real time. In the concrete placement management method according to claim 3,
A concrete placement management method characterized in that a warning is issued by the calculation display device when the placement speed is out of a preset allowable range. A concrete placement management system for placing concrete concretely in a concrete placement space,
A sensor that is disposed above the concrete placement space and that measures a distance from a concrete surface that is displaced upward from below when the concrete is placed, receives a measurement value output from the sensor, and receives the measurement value. A concrete placement management system comprising a calculation display device that calculates a concrete height based on the calculation and displays it in real time. In the concrete placement management system according to claim 5,
A concrete placement management system, wherein the sensor is a laser distance meter. In the concrete placement management system according to claim 5 or 6,
A concrete placement management system, wherein the calculation display device is configured to calculate the concrete placement speed based on the measured value and display the concrete placement speed in real time. In the concrete placement management system according to claim 7,
A concrete placement management system, wherein the calculation display device issues a warning when the placement speed is out of a preset allowable range.

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