CN110306974B - BIM-based drilling perpendicularity automatic monitoring method - Google Patents
BIM-based drilling perpendicularity automatic monitoring method Download PDFInfo
- Publication number
- CN110306974B CN110306974B CN201910627674.7A CN201910627674A CN110306974B CN 110306974 B CN110306974 B CN 110306974B CN 201910627674 A CN201910627674 A CN 201910627674A CN 110306974 B CN110306974 B CN 110306974B
- Authority
- CN
- China
- Prior art keywords
- inclination angle
- angle sensor
- data
- reinforcement cage
- sensor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000005553 drilling Methods 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims abstract description 34
- 238000012544 monitoring process Methods 0.000 title claims abstract description 27
- 230000002787 reinforcement Effects 0.000 claims abstract description 80
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 41
- 239000010959 steel Substances 0.000 claims abstract description 41
- 230000000630 rising effect Effects 0.000 claims abstract description 32
- 238000001514 detection method Methods 0.000 claims abstract description 9
- 230000007246 mechanism Effects 0.000 claims abstract description 8
- 230000001174 ascending effect Effects 0.000 claims abstract description 7
- 238000005259 measurement Methods 0.000 claims description 66
- 238000012546 transfer Methods 0.000 claims description 16
- 238000010276 construction Methods 0.000 claims description 13
- 230000008569 process Effects 0.000 claims description 9
- 230000003321 amplification Effects 0.000 claims description 4
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 4
- 230000008054 signal transmission Effects 0.000 claims description 4
- 238000003466 welding Methods 0.000 claims description 4
- 230000008520 organization Effects 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 3
- 238000011084 recovery Methods 0.000 claims description 3
- 238000012800 visualization Methods 0.000 claims description 3
- 230000003014 reinforcing effect Effects 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 238000005070 sampling Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000012935 Averaging Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/02—Determining slope or direction
- E21B47/022—Determining slope or direction of the borehole, e.g. using geomagnetism
Landscapes
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Geophysics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a BIM-based drilling perpendicularity automatic monitoring method, which comprises the following steps: firstly, constructing a drilling perpendicularity detection mechanism; secondly, setting a unit descending distance of the inclination angle sensor; thirdly, descending the tilt angle sensor; fourthly, acquiring descending data of the tilt angle sensor; fifthly, repeating the third step and the fourth step n times to obtain inclination angle data of n different height positions of the steel reinforcement cage descending along the height direction of the drill hole; sixthly, adjusting the position of the tilt angle sensor; seventhly, ascending and descending the inclination angle sensor; eighthly, acquiring rising data of the tilt sensor; ninthly, repeating the seventh step and the eighth step n times, acquiring inclination angle data of n different height positions of the steel reinforcement cage rising along the height direction of the drilled hole, and calculating the offset distance of the measured data; tenthly, drawing an average offset distance curve graph; and eleven, building a BIM model of the drilled hole and visually monitoring the verticality of the drilled hole. The invention establishes the BIM model of the drilling hole and visually monitors the verticality of the drilling hole, so that technicians can clearly know the inclination state of the pile hole.
Description
Technical Field
The invention belongs to the technical field of drilling perpendicularity monitoring, and particularly relates to a drilling perpendicularity automatic monitoring method based on BIM.
Background
The fender pile technology is widely applied to the construction process of foundation pit engineering, the whole structure can better realize the function of retaining soil and preventing water, the vertical state of a construction hole site is ensured by mechanical operation regulation and control and empirical construction in the construction process of the foundation pit fender pile at the present stage, if the construction hole site is inclined, a fender pile system and a ground surface horizontal coordinate are in a non-vertical state, the whole stability of the fender pile system is lost, the functionality is greatly influenced, the expected maintenance purpose of the stability of the foundation pit cannot be achieved, the fender pile structure cannot reach the expected function, the safety of the foundation pit engineering is threatened, and the obstruction is caused to the next construction process. The existing drilling perpendicularity detection mode includes that an ultrasonic detector is suspended by a pay-off rope to detect the drilling perpendicularity, or a laser detector emits a laser beam to detect the drilling perpendicularity, but after a pile hole of a fender post is formed, water seepage in the hole is serious, the bottom of the hole cannot be seen clearly, and the laser beam emitted by the laser detector cannot play a role; the anti-line rope takes the ultrasonic detector to stretch into water, and the anti-line perpendicularity of the anti-line rope cannot be guaranteed due to the fact that the ultrasonic detector has buoyancy in the water, so that the method that the paying-off rope suspends the ultrasonic detector to detect the perpendicularity of the drill hole is invalid, and accurate measurement of the perpendicularity of the construction hole site is difficult to carry out.
Disclosure of Invention
The invention aims to solve the technical problem that the BIM-based automatic monitoring method for the verticality of the drilled hole is provided aiming at the defects in the prior art, the design is novel and reasonable, the inclination of the drilled hole at different heights is measured by utilizing the reciprocating movement of a reinforcement cage in the drilled hole, the offset distance of the drilled hole in the X direction and the offset distance of the drilled hole in the Y direction are obtained by utilizing the inclination, the average offset distance curve graph in the X direction and the average offset distance curve graph in the Y direction are drawn, a BIM model of the drilled hole is established, the verticality of the drilled hole is visually monitored, the limitation of the traditional measurement is overcome, technicians are clear at a glance of the inclination state of the pile hole, and the BIM-based automatic monitoring method for the verticality of the drilled hole is a powerful tool for progress adjustment and is convenient to popularize and use.
In order to solve the technical problems, the invention adopts the technical scheme that: BIM-based drilling perpendicularity automatic monitoring method is characterized by comprising the following steps:
step one, constructing a drilling perpendicularity detection mechanism, and the process is as follows:
101, mounting an inverted L-shaped support frame beside a construction ground at the top of a drill hole, wherein one end, away from a vertical section of the inverted L-shaped support frame, of a horizontal section of the inverted L-shaped support frame is positioned on a central axis of the drill hole, a pulley block is mounted on the inner side surface of the inverted L-shaped support frame, a crane is mounted on the construction ground, and the crane is positioned on the inner side of the inverted L-shaped support frame;
102, binding a cylindrical reinforcement cage, wherein the outer diameter of the reinforcement cage is smaller than the inner diameter of a drilled hole, the difference between the outer diameter of the reinforcement cage and the inner diameter of the drilled hole is 1-5 cm, one ends of a plurality of hoisting ropes are uniformly arranged at the top of the reinforcement cage, the other ends of the hoisting ropes are connected in an intersecting manner, a steel rope extending out of a crane is connected with the intersecting ends of the hoisting ropes through a pulley block, a cross-shaped connecting frame is horizontally welded at the bottom of the reinforcement cage, and an inclinometer is horizontally arranged at the center of the bottom of the reinforcement cage;
the inclinometer comprises a sensor limiting seat horizontally welded at the bottom of the reinforcement cage and an inclination angle sensor horizontally arranged in the sensor limiting seat, wherein the sensor limiting seat is a groove type limiting seat, and a groove opening of the groove type limiting seat faces to one side far away from the reinforcement cage;
103, processing the data acquired by the tilt angle sensor by a computer, wherein the crane is controlled by the computer;
the inverted L-shaped support frame, the crane, the reinforcement cage, the inclinometer and the computer form a drilling perpendicularity detection mechanism;
step two, setting the unit descending distance of the tilt angle sensor: setting the rotation speed and the unit descending time of the crane by using a computer, acquiring the unit rotating-out length of the steel cable rope, namely the unit descending distance of the steel reinforcement cage and the unit descending distance h of the inclination angle sensor, and
h is the depth of the drilling hole, n is the descending times of the inclination angle sensor and n is a positive integer not less than 3;
step three, descending of the tilt angle sensor: the computer controls the crane to work once, so that the steel reinforcement cage descends once, and the tilt angle sensor descends once;
step four, acquiring descending data of the tilt sensor: after the steel reinforcement cage is stabilized, acquiring inclination angle data of a current descending position of a drill hole by using an inclination angle sensor, and transmitting the acquired inclination angle data of the current descending position to a computer, wherein the inclination angle sensor is an MEMS single-shaft inclination angle sensor, and the MEMS single-shaft inclination angle sensor acquires an inclination angle in the X direction of the current descending position and an inclination angle in the Y direction of the current descending position;
step five, repeating the step three and the step four for n times, wherein the inclination angle sensor respectively acquires inclination angle data of n different height positions of the steel reinforcement cage descending along the height direction of the drilled hole, and transmits the data to the computer;
step six, adjusting the position of the tilt angle sensor: the computer controls the crane to work reversely to make the reinforcement cage rise and the rising heightDegree of
Step seven, ascending and descending of the tilt angle sensor: setting the rotation speed and the unit rising time of the crane by using a computer, acquiring the unit recovery length of the steel rope, namely the unit rising distance of the reinforcement cage, and simultaneously the unit rising distance of the inclination angle sensor, wherein the unit rising distance of the inclination angle sensor is equal to the unit falling distance of the inclination angle sensor, and controlling the crane to work reversely by the computer once to enable the reinforcement cage to rise once, so that the inclination angle sensor rises once;
step eight, acquiring rising data of the tilt sensor: after the steel reinforcement cage is stabilized, the inclination angle sensor collects inclination angle data of the current rising position of the drill hole and transmits the collected inclination angle data of the current rising position to the computer, and the MEMS single-shaft inclination angle sensor collects an inclination angle in the X direction of the current rising position and an inclination angle in the Y direction of the current rising position;
step nine, repeating the step seven and the step eight n times, wherein the inclination angle sensor respectively acquires inclination angle data of n different height positions of the steel reinforcement cage rising along the height direction of the drilled hole, and transmits the data to the computer;
the computer sorts the 2n pairs of inclination angle data according to the sequence of the acquisition of the measurement data and according to a formula
Calculating the offset distance X in the X direction of the ith measurement dataiAnd the offset distance Y in the Y direction of the ith measurement dataiI is the number of times of measurement data of the tilt sensor and i is 1,2, …, 2n, hiDepth value of tilt sensor for i-th measurement data, alphaiFor the i-th measurement of the tilt angle of the tilt sensor in the X-directioniMeasuring the inclination angle of the data Y direction for the ith time by the inclination angle sensor;
repeating the third step to the ninth step M times to obtain M groups of inclination angle data in the height direction of the drill hole, wherein M is a positive integer not less than 3;
according to the formula
Calculating the average offset distance X of the ith measurement data in the X directioniAnd the average offset distance Y in the Y direction of the ith measurement dataiWherein M is the step ten cycle number and M is 1,2, …, M,
the shift distance in X direction, Y, of the ith measurement data in the mth loop step teni mThe offset distance in the Y direction of the ith measurement data in the mth loop step ten is calculated;
respectively drawing an average offset distance curve graph in the X direction and an average offset distance curve graph in the Y direction;
step eleven, building a BIM model of the drilled hole and visually monitoring the verticality of the drilled hole: adding parameter attributes by adding item parameters in a BIM modeling software Revit item, namely expanding average offset distances in X directions and Y directions of measurement data of different depths in an attribute list, defining the organization relationship of the measurement data and the parameter attributes in an IFC file, and enabling a computer to obtain the average offset distance X in the X direction of the ith measurement data obtained in the tenth stepiAnd the average offset distance Y in the Y direction of the ith measurement dataiAnd writing the IFC data format files in batch, thereby performing IFC standard monitoring information-based reading and writing operation on the IFC data format files, defining IFC data format file storage paths, establishing a BIM (building information modeling) model of the measurement data associated with the drill holes, displaying the drill hole form in a three-dimensional graph mode, and observing the inclination states of the drill holes at different depths in a three-dimensional visualization mode in the BIM model.
The BIM-based drilling perpendicularity automatic monitoring method is characterized by comprising the following steps: in the step 102, a limiting through hole is formed in the side wall of the groove type limiting seat, the locking piece penetrates through the limiting through hole to be abutted against the inclination angle sensor, and a plurality of limiting seat welding spots are arranged between the sensor limiting seat and the cross connecting frame.
The BIM-based drilling perpendicularity automatic monitoring method is characterized by comprising the following steps: in the step one install the data transfer case on the lateral wall of shape of falling L support frame, install data transfer circuit board and cable drum in the data transfer case, the integration has microcontroller on the data transfer circuit board and with the GPRS module that microcontroller connects, cable drum's rotation axis and the output shaft coaxial coupling of motor, microcontroller passes through motor drive module control the motor, install signal transmission antenna on the data transfer case, signal transmission antenna is connected with the GPRS module, the one end of cable signal line fix on the cable drum and with microcontroller's signal input part is connected, the other end of cable signal line passes through cable drum, steel cable rope and steel reinforcement cage and is connected with inclination sensor.
The BIM-based drilling perpendicularity automatic monitoring method is characterized by comprising the following steps: the extension rate of the cable signal wire is consistent with that of the steel cable rope, and the retraction rate of the cable signal wire is consistent with that of the steel cable rope.
The BIM-based drilling perpendicularity automatic monitoring method is characterized by comprising the following steps: the value range of h is 1.5 m-2.5 m.
The BIM-based drilling perpendicularity automatic monitoring method is characterized by comprising the following steps: the tilt sensor is connected with the signal input end of the microcontroller through a differential amplification circuit, the differential amplification circuit comprises a differential amplifier AD620, and the tilt sensor is an MEMS high-precision single-axis tilt sensor SCA 103T-D04.
Compared with the prior art, the invention has the following advantages:
1. the inclination angles of different heights of the drill hole are measured by utilizing the reciprocating movement of the reinforcement cage in the drill hole, the reinforcement cage has large self weight and is not influenced by the water level in the drill hole in the process of sinking into the hole, the inclinometer is arranged at the reinforcement cage part and is further not influenced by the surrounding environment of the drill hole, the outer diameter of the reinforcement cage is close to the inner diameter of the drill hole, the swing of the reinforcement cage in the drill hole is reduced, the materials of the reinforcement cage are conveniently obtained on site, and the inclinometer is repeatedly used and is convenient to popularize and use.
2. The unit descending distance of the inclination angle sensor is set according to the depth of the drilled hole, the inclination angle sensor is guaranteed to descend to the bottom of the hole for an integral number of times, if the unit descending distance is too large, the measuring result cannot show the inclination state of each position of the whole pile hole in detail, if the unit descending distance is too small, the measuring result is too complicated, the workload of the measuring process is greatly increased, the field application is inconvenient, the unit descending distance is 1.5-2.5 m, and the using effect is good.
3. The invention has novel and reasonable design, controls the crane to work by utilizing the computer, simultaneously receives data acquired by the inclination angle sensor, acquires the offset distances of the drill holes in the X direction and the Y direction at different heights by utilizing the inclination, draws the average offset distance curve graph in the X direction and the average offset distance curve graph in the Y direction, establishes the BIM model of the drill holes, visually monitors the verticality of the drill holes, makes up the limitation of the traditional measurement, enables technicians to be clear at a glance of the inclination state of the pile holes, is a powerful tool for progress adjustment, and is convenient to popularize and use.
4. The method has simple steps, the descending data of the inclination angle sensor is firstly obtained, and when the reinforcement cage descends to the bottom of the hole and turns back upwards, the position of the inclination angle sensor is adjusted to ensure that the ascending height of the reinforcement cage is equal to
The computer controls the crane to work reversely, so that the steel reinforcement cage rises, the descending measuring point and the ascending measuring point of the tilt sensor are not at the same position, the data sampling point is enlarged, the sampling time is prolonged, and the reliability is improved; the computer sequences the 2n pairs of inclination angle data according to the sequence of the acquisition of the measurement data, calculates the offset distance in the X direction of the measurement data and the offset distance in the Y direction of the measurement data according to the conversion relation between the angle and the offset, and obtains the average offset distance in the X direction of the measurement data and the average offset distance in the Y direction of the measurement data through multiple times of measurement averaging, thereby reducing the interference caused by random measurement and representing the reliable verticality of the drilled hole.
In conclusion, the invention has novel and reasonable design, the inclination of different heights of the drill hole is measured by utilizing the reciprocating movement of the reinforcement cage in the drill hole, the offset distances of the drill hole in different heights in the X direction and the Y direction are obtained by utilizing the inclination, the average offset distance curve graph in the X direction and the average offset distance curve graph in the Y direction are drawn, the BIM model of the drill hole is established and the verticality of the drill hole is visually monitored, the limitation of the traditional measurement is overcome, the inclination state of the pile hole is clear for technicians, and the invention is a powerful tool for progress adjustment and is convenient to popularize and use.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
Fig. 1 is a using state diagram of the drilling perpendicularity detection mechanism of the invention.
Fig. 2 is a schematic view of the connection of the reinforcement cage, the hoisting rope and the steel cable rope according to the present invention.
Fig. 3 is a bottom view of the reinforcement cage of the present invention.
FIG. 4 is a schematic view of the installation relationship of the inclinometer and the reinforcement cage of the present invention.
FIG. 5 is a block flow diagram of a method of the present invention.
Description of reference numerals:
1-data transfer box; 2-cable coil; 3-a signal transmitting antenna;
4-an inverted L-shaped support frame; 5-cable signal line; 6-steel rope;
7, a crane; 8-a reinforcement cage; 9-an inclinometer;
10-a tilt sensor; 11-a sensor limit seat; 12-hoisting ropes;
13-a locking member; 14-limiting seat welding spots; 15, constructing the ground;
and 16, drilling.
Detailed Description
As shown in fig. 1 to 5, the BIM-based drilling verticality automatic monitoring method comprises the following steps:
step one, constructing a drilling perpendicularity detection mechanism, and the process is as follows:
101, mounting an inverted L-shaped support frame 4 beside a construction ground 15 at the top of a drill hole 16, wherein one end, away from a vertical section of the inverted L-shaped support frame 4, of a horizontal section of the inverted L-shaped support frame 4 is located on a central axis of the drill hole 16, a pulley block is mounted on the inner side surface of the inverted L-shaped support frame 4, a crane 7 is mounted on the construction ground 15, and the crane 7 is located on the inner side of the inverted L-shaped support frame 4;
it should be noted that, the purpose that one end of the horizontal section of the inverted L-shaped support frame 4, which is far away from the vertical section of the inverted L-shaped support frame 4, is located on the central axis of the drill hole 16 is to ensure the installation of the pulley block, so that the steel cable rope 6 is located on the central axis of the drill hole 16, and further, the steel reinforcement cage 8 is located at the central position of the drill hole 16.
102, binding a cylindrical reinforcement cage 8, wherein the outer diameter of the reinforcement cage 8 is smaller than the inner diameter of a drill hole 16, the difference between the outer diameter of the reinforcement cage 8 and the inner diameter of the drill hole 16 is 1 cm-5 cm, one ends of a plurality of hoisting ropes 12 are uniformly arranged at the top of the reinforcement cage 8, the other ends of the hoisting ropes 12 are connected in an intersecting manner, a steel rope 6 extending out of a crane 7 is connected with the intersecting ends of the hoisting ropes 12 through a pulley block, a cross-shaped connecting frame is horizontally welded at the bottom of the reinforcement cage 8, and a inclinometer 9 is horizontally arranged at the center of the bottom of the reinforcement cage 8;
in this embodiment, in step 102, a limiting through hole is formed in a side wall of the groove-type limiting seat, the locking member 13 passes through the limiting through hole to abut against the tilt sensor 10, and a plurality of limiting seat welding spots 14 are arranged between the sensor limiting seat 11 and the cross-shaped connecting frame.
In actual use, retaining member 13 passes spacing through-hole and tilt sensor 10 butt, and fixed effectual, and can dismantle, reuse efficiency is high.
The inclinometer 9 comprises a sensor limiting seat 11 horizontally welded at the bottom of the reinforcement cage 8 and an inclination angle sensor 10 horizontally arranged in the sensor limiting seat 11, wherein the sensor limiting seat 11 is a groove type limiting seat, and a groove opening of the groove type limiting seat faces to one side far away from the reinforcement cage 8;
it should be noted that the purpose of setting up the spacing seat of recess formula is the horizontal installation of inclination sensor 10 of being convenient for, and inclination sensor 10 should be installed in 8 bottom central points of steel reinforcement cage and put the department, avoids having the contained angle, and inclination sensor 10's initial levelization is handled and will be produced important influence to the accuracy of later stage measurement work.
103, processing data acquired by the tilt angle sensor 10 through a computer, wherein the crane 7 is controlled by the computer;
the inverted L-shaped support frame 4, the crane 7, the reinforcement cage 8, the inclinometer 9 and the computer form a drilling perpendicularity detection mechanism;
it should be noted that, through utilizing reinforcing cage 8 to reciprocate to remove in drilling 16 and measure the not gradient of the co-altitude of drilling 16, reinforcing cage 8 is from great, sink to downthehole in-process, do not receive the influence of water level in drilling 16, inclinometer 9 installs in reinforcing cage 8 portion, and then do not receive the influence of drilling 16 surrounding environment, reinforcing cage 8's external diameter is close with drilling 16's internal diameter, reduce the swing of reinforcing cage 8 in drilling 16, and reinforcing cage 8 is on-the-spot convenient for draw materials, inclinometer 9 visitor reuse, and convenient to popularize and use.
In practical use, the unit descending distance of the inclination angle sensor 10 is set according to the depth of the drill hole 16, the inclination angle sensor 10 is guaranteed to descend to the bottom of the hole for a whole number of times, if the unit descending distance is too large, the measuring result cannot show the inclination state of each position of the whole pile hole in detail, if the unit descending distance is too small, the measuring result is too complicated, the workload of the measuring process is greatly increased, the field application is not convenient, the unit descending distance is 1.5-2.5 m, and the using effect is good.
Step two, setting the unit descending distance of the tilt angle sensor: setting the rotation speed and the unit descending time of the crane 7 by using a computer, acquiring the unit rotating-out length of the steel cable 6, namely the unit descending distance of the steel reinforcement cage and the unit descending distance h of the inclination angle sensor, and
wherein H is the depth of the borehole 16, n is the number of drops of the tilt sensor 10 and n is a positive integer not less than 3;
step three, descending of the tilt angle sensor: the computer controls the crane 7 to work once, so that the reinforcement cage 8 descends once, and the tilt angle sensor 10 descends once;
step four, acquiring descending data of the tilt sensor: after the reinforcement cage 8 is stabilized, the inclination angle sensor 10 collects inclination angle data of a current descending position of the drill hole 16 and transmits the collected inclination angle data of the current descending position to a computer, wherein the inclination angle sensor 10 is an MEMS single-shaft inclination angle sensor which collects an inclination angle in the X direction of the current descending position and an inclination angle in the Y direction of the current descending position;
step five, repeating the step three and the step four n times, wherein the inclination angle sensor 10 respectively acquires inclination angle data of n different height positions of the steel reinforcement cage 8 descending along the height direction of the drill hole 16 and transmits the data to the computer;
step six, adjusting the position of the tilt angle sensor: the computer controls the crane 7 to work reversely, so that the reinforcement cage 8 rises to the height of
Step seven, ascending and descending of the tilt angle sensor: setting the rotation speed and the unit rising time of the crane 7 by using a computer, acquiring the unit recovery length of the steel cable rope 6, namely the unit rising distance of the reinforcement cage, and simultaneously the unit rising distance of the inclination angle sensor, wherein the unit rising distance of the inclination angle sensor is equal to the unit falling distance of the inclination angle sensor, and controlling the crane 7 to reversely work once by using the computer, so that the reinforcement cage 8 rises once, and then the inclination angle sensor 10 rises once;
step eight, acquiring rising data of the tilt sensor: after the reinforcement cage 8 is stabilized, the inclination angle sensor 10 collects inclination angle data of the current rising position of the drill hole 16, and transmits the collected inclination angle data of the current rising position to the computer, and the MEMS single-shaft inclination angle sensor collects an inclination angle in the X direction of the current rising position and an inclination angle in the Y direction of the current rising position;
it should be noted that, the descending data of the tilt sensor 10 is obtained first, and when the reinforcement cage 8 descends to the bottom of the hole and turns back upwards, the position of the tilt sensor 10 is adjusted to make the height of the reinforcement cage 8 rise to be
Namely the middle position of the last two measuring points, then the computer controls the crane 7 to work reversely, so that the steel reinforcement cage 8 is lifted, the descending measuring point and the ascending measuring point of the tilt sensor 10 are not at the same position, the data sampling point is enlarged, the sampling time is prolonged, and the reliability is improved; the computer sequences the 2n pairs of inclination angle data according to the sequence of the acquisition of the measurement data, calculates the offset distance in the X direction of the measurement data and the offset distance in the Y direction of the measurement data according to the conversion relation between the angle and the offset, and obtains the average offset distance in the X direction of the measurement data and the average offset distance in the Y direction of the measurement data through multiple times of measurement averaging, thereby reducing the interference caused by random measurement and representing the reliable verticality of the drilled hole.
Step nine, repeating the step seven and the step eight n times, respectively acquiring inclination angle data of n different height positions of the steel reinforcement cage 8 which rises along the height direction of the drill hole 16 by the inclination angle sensor 10, and transmitting the data to a computer;
the computer sorts the 2n pairs of inclination angle data according to the sequence of the acquisition of the measurement data and according to a formula
Calculating the offset distance X in the X direction of the ith measurement dataiAnd the offset distance Y in the Y direction of the ith measurement dataiI is the number of times the inclination sensor 10 measures data and i is 1,2, …, 2n, hiDepth value, alpha, of tilt sensor 10 for the ith measurement dataiFor the i-th measurement of the tilt angle, beta, of the tilt sensor 10 in the X directioniThe inclination angle of the inclination angle sensor 10 in the direction of the ith measurement data Y;
repeating the third step to the ninth step M times to obtain M groups of inclination angle data in the height direction of the drill hole 16, wherein M is a positive integer not less than 3;
according to the formula
Calculating the average offset distance X of the ith measurement data in the X directioniAnd the average offset distance Y in the Y direction of the ith measurement dataiWherein M is the step ten cycle number and M is 1,2, …, M,
the shift distance in X direction, Y, of the ith measurement data in the mth loop step teni mThe offset distance in the Y direction of the ith measurement data in the mth loop step ten is calculated;
respectively drawing an average offset distance curve graph in the X direction and an average offset distance curve graph in the Y direction;
step eleven, building a BIM model of the drill hole 16 and visually monitoring the verticality of the drill hole 16: adding parameter attributes by adding item parameters in a BIM modeling software Revit item, namely expanding average offset distances in X directions and Y directions of measurement data of different depths in an attribute list, defining the organization relationship of the measurement data and the parameter attributes in an IFC file, and enabling a computer to obtain the average offset distance X in the X direction of the ith measurement data obtained in the tenth stepiAnd the average offset distance Y in the Y direction of the ith measurement dataiAnd writing the IFC data format files in batch, performing IFC standard monitoring information based read-write operation on the IFC data format files, determining IFC data format file storage paths, establishing a BIM (building information modeling) model of the measurement data associated with the drill holes 16, displaying the shapes of the drill holes 16 in a three-dimensional graph mode, and observing the inclination states of the drill holes 16 at different depths in a three-dimensional visualization mode in the BIM model.
It should be noted that the crane is controlled by the computer to work, the data collected by the inclination angle sensor is received, the offset distances of the drill holes in the X direction and the Y direction are obtained by utilizing the inclination, the average offset distance curve graph in the X direction and the average offset distance curve graph in the Y direction are drawn, the BIM model of the drill holes is established and the verticality of the drill holes is monitored visually, the limitation of traditional measurement is overcome, technicians can know the inclination state of the pile holes at a glance, and the intelligent tool is a powerful tool for progress adjustment.
In this embodiment, in step one install data transfer case 1 on the lateral wall of shape of falling L support frame 4, install data transfer circuit board and cable drum 2 in the data transfer case 1, data transfer circuit board go up integrated have microcontroller and with the GPRS module that microcontroller is connected, the rotation axis of cable drum 2 and the output shaft coaxial coupling of motor, microcontroller passes through motor drive module control the motor is installed signal emission antenna 3 on the data transfer case 1, and signal emission antenna 3 is connected with the GPRS module, the one end of cable signal line 5 fix on cable drum 2 and with microcontroller's signal input part is connected, the other end of cable signal line 5 passes through cable drum 2, steel cable rope 6 and steel reinforcement cage 8 and is connected with inclination sensor 10.
In practical use, the cable signal wire 5 is used for transmitting data acquired by the tilt sensor 10 in a wired manner, in this embodiment, the extension rate of the cable signal wire 5 is consistent with that of the steel cable rope 6, and the retraction rate of the cable signal wire 5 is consistent with that of the steel cable rope 6, so that the cable signal wire 5 is prevented from being broken due to the fact that the cable signal wire 5 and the steel cable rope 6 are asynchronous, and further data transmission fails.
In this embodiment, the value range of h is 1.5m to 2.5 m.
In this embodiment, the tilt sensor 10 is connected to the signal input terminal of the microcontroller through a differential amplifier circuit, the differential amplifier circuit includes a differential amplifier AD620, and the tilt sensor 10 is an MEMS high-precision single-axis tilt sensor SCA 103T-D04.
When the method is used, the inclination of different heights of the drilled hole is measured by utilizing the reciprocating movement of the reinforcement cage in the drilled hole, the offset distances of the drilled hole in the X direction and the Y direction are obtained by utilizing the inclination, the average offset distance curve graph in the X direction and the average offset distance curve graph in the Y direction are drawn, the BIM model of the drilled hole is established and the verticality of the drilled hole is visually monitored, the limitation of the traditional measurement is overcome, so that technicians can clearly know the inclination state of the pile hole, and the method is a powerful tool for progress adjustment.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and all simple modifications, changes and equivalent structural changes made to the above embodiment according to the technical spirit of the present invention still fall within the protection scope of the technical solution of the present invention.
Claims (6)
1. BIM-based drilling perpendicularity automatic monitoring method is characterized by comprising the following steps:
step one, constructing a drilling perpendicularity detection mechanism, and the process is as follows:
101, mounting an inverted L-shaped support frame (4) beside a construction ground (15) at the top of a drill hole (16), wherein one end, far away from a vertical section of the inverted L-shaped support frame (4), of a horizontal section of the inverted L-shaped support frame (4) is located on a central axis of the drill hole (16), a pulley block is mounted on the inner side surface of the inverted L-shaped support frame (4), a crane (7) is mounted on the construction ground (15), and the crane (7) is located on the inner side of the inverted L-shaped support frame (4);
102, binding a cylindrical reinforcement cage (8), wherein the outer diameter of the reinforcement cage (8) is smaller than the inner diameter of a drill hole (16), the difference between the outer diameter of the reinforcement cage (8) and the inner diameter of the drill hole (16) is 1 cm-5 cm, one ends of a plurality of hoisting ropes (12) are uniformly arranged at the top of the reinforcement cage (8), the other ends of the hoisting ropes (12) are connected in an intersecting manner, a steel rope (6) extending out of a crane (7) is connected with the intersecting ends of the hoisting ropes (12) through a pulley block, a cross connecting frame is horizontally welded at the bottom of the reinforcement cage (8), and a inclinometer (9) is horizontally arranged at the center position of the bottom of the reinforcement cage (8);
the inclinometer (9) comprises a sensor limiting seat (11) horizontally welded at the bottom of the reinforcement cage (8) and an inclination angle sensor (10) horizontally installed in the sensor limiting seat (11), the sensor limiting seat (11) is a groove type limiting seat, and a groove opening of the groove type limiting seat faces to one side far away from the reinforcement cage (8);
103, processing data acquired by the tilt angle sensor (10) through a computer, wherein the crane (7) is controlled by the computer;
the inverted L-shaped support frame (4), the crane (7), the reinforcement cage (8), the inclinometer (9) and the computer form a drilling perpendicularity detection mechanism;
step two, setting the unit descending distance of the tilt angle sensor: the rotation speed and the unit descending time of the crane (7) are set by a computer, and the unit rotating-out length of the steel rope (6) is obtained, namely the steelThe unit descending distance of the reinforcement cage is simultaneously the unit descending distance h of the inclination angle sensor, and
wherein H is the depth of the borehole (16), n is the number of drops of the inclination sensor (10) and n is a positive integer not less than 3;
step three, descending of the tilt angle sensor: the computer controls the crane (7) to work once, so that the reinforcement cage (8) descends once, and the tilt angle sensor (10) descends once;
step four, acquiring descending data of the tilt sensor: after the reinforcement cage (8) is stabilized, the inclination angle sensor (10) collects inclination angle data of the current descending position of the drill hole (16) and transmits the collected inclination angle data of the current descending position to the computer, wherein the inclination angle sensor (10) is an MEMS single-shaft inclination angle sensor, and the MEMS single-shaft inclination angle sensor collects an inclination angle in the X direction of the current descending position and an inclination angle in the Y direction of the current descending position;
step five, repeating the step three and the step four n times, wherein the inclination angle sensor (10) respectively acquires inclination angle data of n different height positions of the steel reinforcement cage (8) descending along the height direction of the drill hole (16), and transmits the data to the computer;
step six, adjusting the position of the tilt angle sensor: the computer controls the crane (7) to work reversely, so that the reinforcement cage (8) rises to the height of
Step seven, ascending and descending of the tilt angle sensor: setting the rotation speed and the unit rising time of the crane (7) by using a computer, acquiring the unit recovery length of the steel cable rope (6), namely the unit rising distance of the reinforcement cage, and simultaneously the unit rising distance of the inclination angle sensor, wherein the unit rising distance of the inclination angle sensor is equal to the unit falling distance of the inclination angle sensor, controlling the crane (7) to reversely work once by the computer, so that the reinforcement cage (8) rises once, and then the inclination angle sensor (10) rises once;
step eight, acquiring rising data of the tilt sensor: after the reinforcement cage (8) is stabilized, the inclination angle sensor (10) collects inclination angle data of the current rising position of the drill hole (16), the collected inclination angle data of the current rising position are transmitted to the computer, and the MEMS single-shaft inclination angle sensor collects an inclination angle in the X direction of the current rising position and an inclination angle in the Y direction of the current rising position;
step nine, repeating the step seven and the step eight for n times, wherein the inclination angle sensor (10) respectively acquires inclination angle data of n different height positions of the steel reinforcement cage (8) rising along the height direction of the drill hole (16), and transmits the data to the computer;
the computer sorts the 2n pairs of inclination angle data according to the sequence of the acquisition of the measurement data and according to a formula
Calculating the offset distance X in the X direction of the ith measurement dataiAnd the offset distance Y in the Y direction of the ith measurement dataiI is the number of times of measuring data of the inclination angle sensor (10) and i is 1,2, …, 2n, hiDepth value, alpha, of tilt sensor (10) for the ith measurement dataiFor the i-th measurement of the tilt angle, beta, of the tilt sensor (10) in the X directioniThe inclination angle of the inclination angle sensor (10) in the direction of the ith measurement data Y;
repeating the third step to the ninth step M times to obtain M groups of inclination angle data in the height direction of the drill hole (16), wherein M is a positive integer not less than 3;
according to the formula
Calculating the average offset distance X of the ith measurement data in the X directioniAnd the average offset distance Y in the Y direction of the ith measurement dataiWherein M is the step ten cycle number and M is 1,2, …, M,
the shift distance in X direction, Y, of the ith measurement data in the mth loop step teni mThe offset distance in the Y direction of the ith measurement data in the mth loop step ten is calculated;
respectively drawing an average offset distance curve graph in the X direction and an average offset distance curve graph in the Y direction;
step eleven, building a BIM model of the drilled hole and visually monitoring the verticality of the drilled hole: adding parameter attributes by adding item parameters in a BIM modeling software Revit item, namely expanding average offset distances in X directions and Y directions of measurement data of different depths in an attribute list, defining the organization relationship of the measurement data and the parameter attributes in an IFC file, and enabling a computer to obtain the average offset distance X in the X direction of the ith measurement data obtained in the tenth stepiAnd the average offset distance Y in the Y direction of the ith measurement dataiAnd writing the IFC data format files in batch, thereby performing IFC standard monitoring information-based reading and writing operation on the IFC data format files, defining IFC data format file storage paths, establishing a BIM (building information modeling) model of the measurement data associated with the drill holes, displaying the drill hole form in a three-dimensional graph mode, and observing the inclination states of the drill holes at different depths in a three-dimensional visualization mode in the BIM model.
2. The BIM-based borehole verticality automatic monitoring method according to claim 1, characterized in that: in the step 102, a limiting through hole is formed in the side wall of the groove type limiting seat, a locking piece (13) penetrates through the limiting through hole to be abutted against the tilt angle sensor (10), and a plurality of limiting seat welding spots (14) are arranged between the sensor limiting seat (11) and the cross connecting frame.
3. The BIM-based borehole verticality automatic monitoring method according to claim 1, characterized in that: in the first step, a data transfer box (1) is arranged on the outer side wall of the inverted L-shaped support frame (4), a data transfer circuit board and a cable coil (2) are arranged in the data transfer box (1), a microcontroller and a GPRS module connected with the microcontroller are integrated on the data transfer circuit board, a rotating shaft of the cable coil (2) is coaxially connected with an output shaft of the motor, microcontroller passes through motor drive module control the motor is installed signal transmission antenna (3) on data transfer case (1), signal transmission antenna (3) are connected with the GPRS module, the one end of cable signal line (5) be fixed on cable drum (2) and with microcontroller's signal input part is connected, the other end of cable signal line (5) passes through cable drum (2), cable rope (6) and steel reinforcement cage (8) and is connected with inclination sensor (10).
4. The BIM-based borehole verticality automatic monitoring method according to claim 3, characterized in that: the elongation rate of the cable signal wire (5) is consistent with that of the steel cable rope (6), and the retraction rate of the cable signal wire (5) is consistent with that of the steel cable rope (6).
5. The BIM-based borehole verticality automatic monitoring method according to claim 1, characterized in that: the value range of h is 1.5 m-2.5 m.
6. The BIM-based borehole verticality automatic monitoring method according to claim 3, characterized in that: the tilt angle sensor (10) is connected with the signal input end of the microcontroller through a differential amplification circuit, the differential amplification circuit comprises a differential amplifier AD620, and the tilt angle sensor (10) is an MEMS high-precision single-axis tilt angle sensor SCA 103T-D04.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910627674.7A CN110306974B (en) | 2019-07-12 | 2019-07-12 | BIM-based drilling perpendicularity automatic monitoring method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910627674.7A CN110306974B (en) | 2019-07-12 | 2019-07-12 | BIM-based drilling perpendicularity automatic monitoring method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110306974A CN110306974A (en) | 2019-10-08 |
| CN110306974B true CN110306974B (en) | 2022-03-04 |
Family
ID=68079857
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910627674.7A Active CN110306974B (en) | 2019-07-12 | 2019-07-12 | BIM-based drilling perpendicularity automatic monitoring method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110306974B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113945141B (en) * | 2021-09-07 | 2024-02-09 | 深圳宏业基岩土科技股份有限公司 | Method for detecting verticality of bored pile |
| CN114737956B (en) * | 2022-04-29 | 2023-05-26 | 中国电建集团成都勘测设计研究院有限公司 | Drilling inclination control and measurement device and method for steel rope impact drilling machine |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2165524C2 (en) * | 1999-04-05 | 2001-04-20 | Томский политехнический университет | Method determining zenith angle and azimuth of plane of inclination of borehole and device for its implementation |
| CN101413264A (en) * | 2008-11-20 | 2009-04-22 | 上海建工（集团）总公司 | Lattice column triaxial automatic wireless real time hanging system and method |
| CN201650266U (en) * | 2010-01-29 | 2010-11-24 | 中国水利水电第五工程局有限公司 | Measuring device for guide hole tilt angle of inverse well drill |
| CN102628355A (en) * | 2012-04-18 | 2012-08-08 | 中煤科工集团西安研究院 | Cable-free borehole clinometer and synchronous inclinometry method thereof based on synchronization technology |
| CN203961956U (en) * | 2014-07-04 | 2014-11-26 | 中铁十局集团济南铁路工程有限公司 | Full screw earth auger construction CFG pile verticality monitoring device |
| CN104350396A (en) * | 2012-03-29 | 2015-02-11 | 普拉德研究及开发股份有限公司 | Electromagnetic method for obtaining dip azimuth angle |
| CN105927213A (en) * | 2016-07-08 | 2016-09-07 | 武汉市市政建设集团有限公司 | Accurate measuring device and method for pore-forming verticality of bored pile |
| WO2017007738A1 (en) * | 2015-07-05 | 2017-01-12 | Schlumberger Technology Corporation | Borehole trajectory via multi-component borehole seismic receiver |
| CN106545329A (en) * | 2016-11-09 | 2017-03-29 | 武汉长盛工程检测技术开发有限公司 | Drilled pile hole quality detection means and method |
| CN108119126A (en) * | 2017-11-27 | 2018-06-05 | 中铁十二局集团有限公司 | Drilled pile inspecting hole equipment and drilled pile inspecting hole method |
| CN108915672A (en) * | 2018-06-14 | 2018-11-30 | 北京市勘察设计研究院有限公司 | Foundation pit shallow bore hole drilling construction quality dynamic monitoring system and device |
| CN109854229A (en) * | 2019-04-10 | 2019-06-07 | 北京市市政工程研究院 | A kind of drilling rod testing apparatus for verticality and method |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6585061B2 (en) * | 2001-10-15 | 2003-07-01 | Precision Drilling Technology Services Group, Inc. | Calculating directional drilling tool face offsets |
| US6944545B2 (en) * | 2003-03-25 | 2005-09-13 | David A. Close | System and method for determining the inclination of a wellbore |
| US6843318B2 (en) * | 2003-04-10 | 2005-01-18 | Halliburton Energy Services, Inc. | Method and system for determining the position and orientation of a device in a well casing |
-
2019
- 2019-07-12 CN CN201910627674.7A patent/CN110306974B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2165524C2 (en) * | 1999-04-05 | 2001-04-20 | Томский политехнический университет | Method determining zenith angle and azimuth of plane of inclination of borehole and device for its implementation |
| CN101413264A (en) * | 2008-11-20 | 2009-04-22 | 上海建工（集团）总公司 | Lattice column triaxial automatic wireless real time hanging system and method |
| CN201650266U (en) * | 2010-01-29 | 2010-11-24 | 中国水利水电第五工程局有限公司 | Measuring device for guide hole tilt angle of inverse well drill |
| CN104350396A (en) * | 2012-03-29 | 2015-02-11 | 普拉德研究及开发股份有限公司 | Electromagnetic method for obtaining dip azimuth angle |
| CN102628355A (en) * | 2012-04-18 | 2012-08-08 | 中煤科工集团西安研究院 | Cable-free borehole clinometer and synchronous inclinometry method thereof based on synchronization technology |
| CN203961956U (en) * | 2014-07-04 | 2014-11-26 | 中铁十局集团济南铁路工程有限公司 | Full screw earth auger construction CFG pile verticality monitoring device |
| WO2017007738A1 (en) * | 2015-07-05 | 2017-01-12 | Schlumberger Technology Corporation | Borehole trajectory via multi-component borehole seismic receiver |
| CN105927213A (en) * | 2016-07-08 | 2016-09-07 | 武汉市市政建设集团有限公司 | Accurate measuring device and method for pore-forming verticality of bored pile |
| CN106545329A (en) * | 2016-11-09 | 2017-03-29 | 武汉长盛工程检测技术开发有限公司 | Drilled pile hole quality detection means and method |
| CN108119126A (en) * | 2017-11-27 | 2018-06-05 | 中铁十二局集团有限公司 | Drilled pile inspecting hole equipment and drilled pile inspecting hole method |
| CN108915672A (en) * | 2018-06-14 | 2018-11-30 | 北京市勘察设计研究院有限公司 | Foundation pit shallow bore hole drilling construction quality dynamic monitoring system and device |
| CN109854229A (en) * | 2019-04-10 | 2019-06-07 | 北京市市政工程研究院 | A kind of drilling rod testing apparatus for verticality and method |
Non-Patent Citations (1)
| Title |
|---|
| 钻孔灌注桩桩孔倾斜度的检测;刘鑫;《路基工程》;20041231(第04期);第38-39页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110306974A (en) | 2019-10-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113203368B (en) | Detection method of pile foundation pore-forming shape and verticality detection device | |
| CN110306974B (en) | BIM-based drilling perpendicularity automatic monitoring method | |
| CN105927213B (en) | Accurate measuring device and measuring method for hole forming verticality of cast-in-situ bored pile | |
| CN111998839B (en) | Support column positioning and verticality detection system based on reverse construction method | |
| KR101991492B1 (en) | Automatic inclinometer | |
| CN114034282A (en) | Embedded ground settlement monitoring device and monitoring method thereof | |
| CN205895168U (en) | Triaxial stirring stake drilling rod perpendicularity control device | |
| CN112284362B (en) | Device and method for measuring perpendicularity of steel casing in deepwater area | |
| CN213579343U (en) | Laser plumb line measuring device and laser plumb line measuring system | |
| CN113090250A (en) | Hole detector for cast-in-situ bored pile | |
| CN113310466A (en) | Anti-slide pile deviation monitoring device and monitoring method | |
| CN211115966U (en) | Mechanical inclinometer based on drilling fluid circulation | |
| CN111779042A (en) | A kind of foundation pit intelligent measurement method and its data intelligent management system | |
| CN215639587U (en) | Deep foundation pit monitoring device | |
| CN216865092U (en) | Pile foundation base intelligence borer is visited device | |
| CN218724219U (en) | Tower verticality detection device | |
| CN214666578U (en) | Bored concrete pile pore-forming gradient detection device | |
| CN214573946U (en) | Hole stake steel of high accuracy protects a locating rack | |
| CN113982011A (en) | Open caisson heading machine guiding system and method based on static inclinometer | |
| CN222936733U (en) | A simple imaging and entry device for deep holes in slopes | |
| CN219161238U (en) | Device for monitoring deformation of underground roadway | |
| CN220541986U (en) | Deep foundation pit displacement detection alarm device | |
| CN223021343U (en) | A water level monitoring device for deep foundation pit of an engineering project | |
| CN220690074U (en) | Open caisson construction straightness monitoring devices that hangs down | |
| CN221030060U (en) | Automatic drill rod detector |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |