CN214427614U - Auxiliary device for detecting collision of peripheral pipelines of foundation pit and anchor cable based on BIM - Google Patents
Auxiliary device for detecting collision of peripheral pipelines of foundation pit and anchor cable based on BIM Download PDFInfo
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- CN214427614U CN214427614U CN202023076244.8U CN202023076244U CN214427614U CN 214427614 U CN214427614 U CN 214427614U CN 202023076244 U CN202023076244 U CN 202023076244U CN 214427614 U CN214427614 U CN 214427614U
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Abstract
The utility model discloses a BIM-based auxiliary device for detecting collision between a peripheral pipeline of a foundation pit and an anchor cable, which comprises a plugging block, a drill rod, a GPS receiving and transmitting antenna, a signal indicator, a GPS positioning unit arranged at the head of the drill rod and a geological probe; the GPS positioning unit is connected with a GPS receiving and transmitting antenna at the top of the plugging block through a wire; the GPS positioning unit and the geological probe can respectively acquire the position coordinates of the geological probe and the three-dimensional model of the pipeline around the head of the drill rod and transmit the three-dimensional model to the server end for anchor cable collision detection, and the signal indicator is arranged on the plugging block and can send out a prompt signal according to the collision detection result. Because the head of each drill rod is integrated with the GPS positioning unit and the geological detection unit, a plurality of auxiliary devices for collision detection are arranged at intervals around the edge of the foundation pit, and after each drill rod is inserted into a rock stratum in the side wall of the foundation pit, a circle of geological detection unit and the GPS positioning unit are arranged around the foundation pit, a three-dimensional model of the pipeline can be accurately constructed, and the simulation detection and optimization of the BIM collision point are realized.
Description
Technical Field
The utility model relates to an engineering information ization construction technical field especially relates to a peripheral pipeline of foundation ditch and auxiliary device that anchor rope collision detected based on BIM.
Background
With the increasing speed of urban construction, urban land is increasingly tense. In order to utilize the building land to the maximum extent, the excavation depth of the foundation pit is deeper and deeper, and the plane shape of the foundation pit is more and more complex. In order to avoid various inconveniences caused by the inner support to construction, pile missupport is usually considered preferentially to replace the inner support design in the deep foundation pit design stage, and prestressed anchor rods and waist beams are utilized to provide anchor tension for supporting row piles so as to reduce the internal force and displacement of the supporting row piles, and further the deformation and displacement of the foundation pit are controlled within an allowable range.
Underground pipelines are important infrastructures in cities, and the important hidden infrastructures are important infrastructures, which are underground pipelines, cannot be used for implementing traffic, energy, communication, information networks and the like. Through the combination of an enclosure system and a peripheral pipeline model in a construction BIM (Building Information Modeling) model, collision points are quickly detected by means of processing and analysis of software, and the position and detailed Information of the collision points are provided, so that design and construction units can be helped to adjust planning and arrangement of structures such as foundation pit anchor cables and peripheral pipelines in a limited space, the possibility of collision between the anchor cables and the peripheral pipelines is reduced, technical support is provided for foundation pit enclosure structure construction, construction risks and influences on the periphery are reduced, and the engineering quality is guaranteed.
However, for various reasons, the pipeline data in the actual construction process is often not complete, and mostly not consistent with the current situation, and various pipelines belong to different departments, and many years are long, which results in the unclear relative relationship between the positions of the foundation pit and the peripheral pipelines, and increases the difficulty and accuracy of the generation of the peripheral pipeline model. In the engineering construction, the pipeline is often broken due to the unclear position of the pipeline, so that accidents such as water cut, power failure, communication interruption and the like are caused, and great inconvenience is brought to the foundation pit construction.
The conventional peripheral pipeline model generation mainly depends on workers to periodically utilize a monitoring tool to measure on a construction site, manually input the measured peripheral pipeline model into a BIM, rebuild the peripheral pipeline model, and then combine the peripheral pipeline model with a model of an enclosure system, so that timely and automatic detection cannot be realized.
SUMMERY OF THE UTILITY MODEL
In view of the not enough of prior art existence, the utility model provides a peripheral pipeline of foundation ditch and auxiliary device that anchor rope collision detected based on BIM can be used for the accurate pipeline three-dimensional model that founds, makes it combine with the foundation ditch model in BIM, carries out the anchor rope collision and detects, in time discovers the collision point and optimizes anchor rope inclination.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a BIM-based auxiliary device for detecting collision between a peripheral pipeline of a foundation pit and an anchor cable comprises a plugging block, a drill rod embedded into a rock stratum, a GPS receiving and transmitting antenna, a signal line interface, a signal indicator, a GPS positioning unit and a geological probe, wherein the GPS positioning unit and the geological probe are arranged at the head of the drill rod; the plugging block and the drill rod are internally provided with wire holes for the GPS positioning unit and the wire of the geological probe to penetrate through, the plugging block is used for clinging to the side wall of the foundation pit and clinging to the tail end of the drill rod, and the GPS positioning unit is connected with a GPS receiving and transmitting antenna fixed at the top of the plugging block through the wire; the GPS positioning unit and the geological probe are respectively used for acquiring the position coordinates of the geological probe and a pipeline three-dimensional model containing pipeline images on the periphery of the drill rod head and transmitting the model to the server end through the signal line interface for anchor cable collision detection, and the signal indicator is arranged on the plugging block and used for sending out a prompt signal according to an instruction sent back by the signal line interface when the server end detects that a collision point is in front of the geological probe.
As one embodiment, the geological probe is one of a geological radar and an infrared probe.
In one embodiment, the head of the drill rod is a transparent layer.
In one embodiment, the geological probe is rotatably disposed within the drill rod.
In one embodiment, the signal indicator is an indicator light or a buzzer.
As one embodiment, the upper portion of the plugging block is provided with an accommodating cavity, the signal indicator is accommodated in the accommodating cavity, and one side of the accommodating cavity, which faces away from the rock stratum, is sealed by a transparent cover plate.
As one embodiment, a screw rod, a translation block moving along the screw rod along with the rotation of the screw rod and a limiting claw with one end hinged with the translation block are further arranged in the drill rod; the drill rod comprises a hollow channel which penetrates through the drill rod to the blocking block along the axial direction of the drill rod, a limiting hole which penetrates through the side wall of the drill rod and a guide part with internal threads in the hollow channel, and the blocking block is provided with an extending channel which penetrates through the thickness direction of the blocking block and is communicated with the hollow channel; the screw rod penetrates through the extension channel and the hollow channel simultaneously and is in threaded fit with the guide part, one end of the limiting claw moves along with the movement of the translation block along the screw rod, and the other end of the limiting claw deflects in the limiting hole to change the length of the limiting claw extending out of the limiting hole.
In one embodiment, the aperture of the limiting hole is gradually reduced from inside to outside.
In one embodiment, a cross section of the stopper hole along an axial direction passing through the drill rod is trapezoidal.
As one embodiment, a plurality of limiting claws are arranged on the translation block, and the limiting claws are arranged at intervals in the circumferential direction of the translation block.
The utility model discloses an auxiliary device that every collision detected all integrates there is the drill rod structure, integrated GPS positioning unit, geological detection unit in the head of drill rod, arranges through the marginal interval ground that centers on the foundation ditch with numerous collision detection's auxiliary device, after every drill rod inserts the rock stratum in the foundation ditch lateral wall, arranges round geological detection unit and GPS positioning unit around the foundation ditch promptly. The drill rod is made into a hollow structure, leads wires of the geological detection unit and the GPS positioning unit are led out to be connected with a computer monitoring center, so that a three-dimensional model of the pipeline can be accurately constructed, the three-dimensional model of the pipeline is led into a BIM three-dimensional digital system for checking the peripheral pipelines of the foundation pit, the simulation detection and optimization of BIM collision points are realized, and a prompt signal can be sent out at the position of a corresponding auxiliary device when the collision point is detected at the current position.
Drawings
Fig. 1 is a schematic view of a usage of an auxiliary device for detecting collision between a foundation pit peripheral pipeline and an anchor cable based on BIM according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a collision test process of a foundation pit model and a pipeline model of a BIM model according to the present invention;
fig. 3 is a schematic view illustrating switching of the working state of the limiting claw according to the embodiment of the present invention;
fig. 4 is a partially enlarged view of fig. 3.
Detailed Description
In the present invention, the terms "disposed", "provided" and "connected" should be interpreted broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meaning of these terms in the present invention can be understood by those of ordinary skill in the art as appropriate.
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, the embodiment of the utility model provides a peripheral pipeline of foundation ditch and anchor rope collision detection' S auxiliary device based on BIM, mainly include shutoff piece 10, drill rod 20, fastener 30, GPS receiving and dispatching antenna 40, signal line interface 50, signal indicator S and GPS positioning unit 201 and geological probe 202, drill rod 20 is the conical cylinder of head, be used for embedding rock stratum (or soil layer), the head of drill rod 20 (the one end that stretches into the rock stratum promptly) is located to GPS positioning unit 201 and geological probe 202, shutoff piece 10 is used for in drill rod 20 embedding rock stratum back, paste the lateral wall of foundation ditch, support the tail end of drill rod 20 (the one end that stretches out the rock stratum promptly) in the rock stratum, prevent that it from scurrying out and influence GPS and geological survey precision. The fastener 30 may be used to secure the block 10 within the formation of the side wall of the pit.
The drill rod 20 is hollow, the GPS receiving and transmitting antenna 40 is located at the top of a foundation pit, wire holes for the GPS positioning unit 201 and the geological probe 202 to penetrate through are formed in the blocking block 10 and the drill rod 20, the blocking block 10 is used for being attached to the side wall of the foundation pit and abutting against the tail end of the drill rod 20, and the GPS positioning unit 201 is connected with the GPS receiving and transmitting antenna 40 fixed at the top of the blocking block 10 through a wire. The GPS positioning unit 201 and the geological probe 202 are respectively used for acquiring the position coordinates of the geological probe 202 and a pipeline three-dimensional model containing pipeline images at the periphery of the head of the drill rod 20 and transmitting the model to a server end through a signal line interface 50 for anchor cable collision detection, and the signal indicator S is arranged on the plugging block 10 and used for sending a prompt signal according to an instruction sent back by the signal line interface 50 when the server end detects that a collision point exists in front of the geological probe 202.
The geological probe 202 may be a geological radar, and adopts an electromagnetic method to detect, and determines the trend of the pipeline by emitting high-frequency electromagnetic waves and receiving echoes to judge the underground structure. The geological probe 202 may also be an infrared probe, which detects by infrared radiation based on the temperature difference between the underground pipeline and the surrounding soil.
Preferably, the head of the drill rod 20 is a transparent layer through which electromagnetic waves, light, etc. to be detected can easily penetrate. In some embodiments, the geological probe 202 is also rotatably disposed within the drill rod 20 and driven by a micro-motor or the like.
Because each auxiliary device for collision detection is integrated with a drill rod structure, a GPS positioning unit and a geological detection unit are integrated in the head of the drill rod, a plurality of auxiliary devices for collision detection are arranged at intervals around the edge of the foundation pit to form a detection system with a computer monitoring center, and after each drill rod is inserted into a rock stratum in the side wall of the foundation pit, a circle of geological detection units and GPS positioning units are arranged around the foundation pit. The drill rod is made into a hollow structure, leads wires of the geological detection unit and the GPS positioning unit are led out to be connected with a computer monitoring center, so that a three-dimensional model of the pipeline can be accurately constructed, the three-dimensional model of the pipeline is led into a BIM three-dimensional digital system for checking the peripheral pipelines of the foundation pit, the simulation detection and optimization of BIM collision points are realized, and a prompt signal can be sent out at the position of a corresponding auxiliary device when the collision point is detected at the current position.
The leads of the GPS positioning unit 201 and the geological detection unit 202 are led out from the hollow drill rod 20 and the blocking block 10 in sequence, and are finally connected to a universal data interface 1 above the blocking block 10, so that the GPS positioning unit and the geological detection unit can be in butt joint with a data interface of a computer to transmit data. The block 10 is used for covering the outer end part of the drill rod 20 and also serves as a function of protecting a signal line, and the GPS receiving and transmitting antenna 40 can be arranged at the top of the block 10 to ensure that the internal GPS positioning unit 201 obtains an accurate position.
During collision detection, a computer firstly constructs a three-dimensional mesh distribution map of the geological detection units 202 according to the position information of each GPS positioning unit 201, then controls each geological detection unit 202 to work and scan and detect the surrounding three-dimensional terrain, so that a pipeline three-dimensional model with a pipeline 3D shape and distribution positions is formed, and the computer selects an anchor cable component for collision detection and finds collision points according to the pipeline three-dimensional model and a foundation pit three-dimensional model by adopting a BIM (building information modeling) technology. And optimizing the design angle of the anchor cable one by one aiming at each collision point, reducing the number of collision points of the anchor cable in theory by a large margin, performing technical attack and customs aiming at the problem of inevitable collision, and finally drilling according to the optimized design angle of the anchor cable in the BIM model scheme.
As shown in fig. 2, for example, a rectangular dashed box E in the figure is an ideal arrangement range of the anchor cables, the rectangular dashed box E is a limit boundary, the collision point A, B is found to be located in the rectangular dashed box E, and C, D is not located in the rectangular dashed box E, so that the inclination angle of the anchor cables needs to be adjusted for two positions, namely the collision point A, B, to optimize the design.
Since the drill rod 20 is easy to install and remove, and can be applied to almost all foundation pits, modularization and informatization of the BIM system are achieved. On one hand, the auxiliary device of the embodiment can be used as a standardized structural unit, and foundation pit environments of various scales can be detected by arranging a plurality of auxiliary devices in the foundation pit, so that the auxiliary device has better compatibility; on the other hand, the conducting wires of the auxiliary devices are led out to be connected with the computer monitoring center, a three-dimensional pipeline model of the surrounding environment of the foundation pit can be generated by the computer, all data are collected at one time and transmitted back to the computer to construct the BIM model, data acquisition is rapid, the automation degree is high, and informatization of foundation pit engineering construction is achieved.
Here, the signal indicator S may be an indicator lamp, a display, or a buzzer. Specifically, an accommodating cavity may be formed in the upper portion of the plugging block 10, the signal indicator S is accommodated in the accommodating cavity, and one side of the accommodating cavity facing away from the rock formation is sealed by a transparent cover plate P. For example, when the signal indicator S is an indicator light or a display, the transparent cover P may serve as a transparent observation window. When the BIM model detects that the anchor cable collision point exists at the position, a signal lamp at the corresponding drill rod 20 is turned on, a display displays prompt information, or a buzzer sends out an alarm as a prompt to remind a worker that the collision point exists at the position originally, but after optimization, the anchor cable drilling angle during construction is different from other positions, and engineering accidents can be avoided.
In order to achieve a better fixation of the drill rod 20 and to achieve a reusability of the probe/GPS positioning unit, the drill rod has a telescopic claw design, as described in detail below.
As shown in fig. 3, a screw 21, a translation block 22 and a limit claw 23 with one end hinged to the translation block 22 are further disposed in the drill rod 20, and the translation block 22 is in threaded fit with the screw 21 through an internal threaded hole and can move back and forth on the screw 21 along with the rotation of the screw 21. The drill rod 20 comprises a hollow channel 200 penetrating to the blocking block 10 along the axial direction thereof, a limiting hole 200a penetrating through the side wall of the drill rod 20, and a guide part 200b with internal threads in the hollow channel 200, and the blocking block 10 is provided with an extending channel 100 penetrating through the thickness direction thereof and communicating with the hollow channel 200; the screw 21 is simultaneously inserted into the extending channel 100 and the hollow channel 200, and is in threaded fit with the guiding portion 200b, one end of the limiting claw 23 moves along with the movement of the translation block 22 along the screw 21, and the other end deflects in the limiting hole 200a to change the length of the limiting claw extending out of the limiting hole 200 a. The guide portions 200b may be provided in plural at intervals in the longitudinal direction of the drill rod 20, for example, two guide portions 200b are provided on the side of all the stopper holes 200a near the tail of the drill rod 20. The screw 21 extends out of the block 10 as an operation part 21a for driving a motor or a person to rotate.
In order to match the swing track of the limiting claw 23 and achieve a better limiting effect on the limiting claw 23, the aperture of the limiting hole 200a is gradually reduced from inside to outside, for example, the cross section of the limiting hole 200a along the axial direction passing through the drill rod 20 may be trapezoidal. The translation block 22 may be provided with a plurality of limiting claws 23, and the limiting claws 23 are arranged at intervals in the circumferential direction of the translation block 22. The translation block 22 can also be designed into a plurality of blocks, each translation block 22 is provided with a plurality of limiting claws 23, and the limiting claws 23 are symmetrically arranged on the translation block 22, so that the positioning reliability of the drill rod 20, namely the GPS positioning unit 201 and the geological probe 202, can be improved.
When the auxiliary device needs to be installed, the limiting claw 24 is contracted in the limiting hole 200a of the drill rod 20 (the limiting claw 24 is shown in a dotted line in fig. 4), the limiting claw 24 is closer to the head of the drill rod relative to the translation block 22, namely, the free end of the limiting claw 24 is inclined towards the head of the screw 21, and the drill rod 20 can be conveniently inserted into a hole drilled in a rock stratum; after the drill rod 20 is completely inserted into the rock stratum, the translation block 22 of the rotary screw rod 21 moves towards the head part of the drill rod, the inclination angle of the limiting claw 24 relative to the screw rod 21 is gradually increased until the limiting claw 24 is simultaneously abutted against the inner edge and the outer edge of the limiting hole 200a (like the solid line limiting claw 24 in fig. 4), the limiting claw 24 cannot be continuously opened, at the moment, the limiting claw 24 and the drill rod 20 are pulled out at an acute angle to form a barb structure, the rock stratum can be tightly clamped, the drill rod 20 can be prevented from being accidentally pulled out or loosened, at the moment, the plugging block 10 can be continuously installed, the extension channel 100 is aligned with the hollow channel 200, and the plugging block 10 is fixed in the rock stratum on the side wall of the foundation pit by using the fastener 30; when the drill rod 20 needs to be detached, the screw rod 21 only needs to be rotated reversely, so that the limiting claw 24 deflects to retract into the drill rod 20, and can be easily pulled out, and the drill rod 20, the GPS positioning unit 201 and the geological detection unit 202 are reused.
To sum up, the utility model discloses an auxiliary device that every collision detected all integrates the drill rod structure, integrated GPS positioning unit, geology detection unit in the head of drill rod, arranges through the edge interval that centers on numerous collision detection's auxiliary device around the foundation ditch, inserts the rock stratum back in the foundation ditch lateral wall as every drill rod, arranges round geology detection unit and GPS positioning unit around the foundation ditch promptly. The drill rod is made into a hollow structure, leads wires of the geological detection unit and the GPS positioning unit are led out to be connected with a computer monitoring center, so that a three-dimensional model of the pipeline can be accurately constructed, the three-dimensional model of the pipeline is led into a BIM three-dimensional digital system for checking the peripheral pipelines of the foundation pit, the simulation detection and optimization of BIM collision points are realized, and a prompt signal can be sent out at the position of a corresponding auxiliary device when the collision point is detected at the current position.
The foregoing is directed to embodiments of the present application and it is noted that numerous modifications and adaptations may be made by those skilled in the art without departing from the principles of the present application and are intended to be within the scope of the present application.
Claims (10)
1. The BIM-based auxiliary device for detecting collision of the pipeline and the anchor cable around the foundation pit is characterized by comprising a blocking block (10), a drill rod (20) embedded into a rock stratum, a GPS (global positioning system) transceiving antenna (40), a signal line interface (50), a signal indicator (S), a GPS positioning unit (201) and a geological probe (202), wherein the GPS positioning unit (201) and the geological probe (202) are arranged at the head of the drill rod (20); wire holes for the GPS positioning unit (201) and the wires of the geological probe (202) to penetrate are formed in the blocking block (10) and the drill rod (20), the blocking block (10) is used for clinging to the side wall of a foundation pit and clinging to the tail end of the drill rod (20), and the GPS positioning unit (201) is connected with a GPS receiving and transmitting antenna (40) fixed at the top of the blocking block (10) through the wires; the GPS positioning unit (201) and the geological probe (202) are respectively used for acquiring the position coordinates of the geological probe (202), a pipeline three-dimensional model containing pipeline images around the head of the drill rod (20) and transmitting the model to a server end through the signal line interface (50) for anchor cable collision detection, and the signal indicator (S) is arranged on the plugging block (10) and used for sending out a prompt signal according to an instruction sent back by the signal line interface (50) when the server end detects that a collision point exists in front of the geological probe (202).
2. The BIM-based auxiliary device for detecting collision of pipelines and anchor cables around foundation pits is characterized in that the geological probe (202) is one of a geological radar and an infrared probe.
3. The BIM-based auxiliary device for detecting collision of pipelines around foundation pits with anchor cables as claimed in claim 1, wherein the head of the drill rod (20) is a transparent layer.
4. The BIM-based auxiliary device for detecting collision of pipelines around foundation pits with anchor cables as claimed in claim 1, wherein the geological probe (202) is rotatably arranged in the drill rod (20).
5. The BIM-based auxiliary device for detecting collision of pipelines and anchor cables around foundation pits is characterized in that the signal indicator (S) is an indicator lamp or a buzzer.
6. The BIM-based auxiliary device for detecting collision of pipelines and anchor cables around foundation pits is characterized in that the upper part of the blocking block (10) is provided with a containing cavity, the signal indicator (S) is contained in the containing cavity, and one side of the containing cavity, which faces away from the rock stratum, is sealed by a transparent cover plate (P).
7. The BIM-based auxiliary device for detecting collision of pipelines and anchor cables around foundation pits according to any one of claims 1 to 6, wherein a screw rod (21), a translation block (22) moving along the screw rod (21) along with rotation of the screw rod (21) and a limiting claw (23) with one end hinged with the translation block (22) are further arranged in the drill rod (20); the drill rod (20) comprises a hollow channel (200) penetrating to the blocking block (10) along the axial direction of the drill rod, a limiting hole (200a) penetrating through the side wall of the drill rod (20) and a guide part (200b) with internal threads in the hollow channel (200), and the blocking block (10) is provided with an extending channel (100) penetrating through the thickness direction of the blocking block and communicated with the hollow channel (200); the screw rod (21) is simultaneously arranged in the extension channel (100) and the hollow channel (200) in a penetrating mode and in threaded fit with the guide part (200b), one end of the limiting claw (23) moves along with the movement of the translation block (22) along the screw rod (21), and the other end of the limiting claw deflects in the limiting hole (200a) to change the length of the limiting claw extending out of the limiting hole (200 a).
8. The BIM-based auxiliary device for detecting collision of pipelines and anchor cables around foundation pits is characterized in that the aperture of the limiting hole (200a) is gradually reduced from inside to outside.
9. The BIM-based auxiliary device for detecting collision of pipelines and anchor cables around foundation pits according to claim 8, wherein the cross section of the limiting hole (200a) along the axial direction passing through the drill rod (20) is trapezoidal.
10. The BIM-based auxiliary device for detecting collision of pipelines and anchor cables around foundation pits is characterized in that a plurality of limiting claws (23) are arranged on the translation block (22), and the limiting claws (23) are arranged at intervals in the circumferential direction of the translation block (22).
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113969589A (en) * | 2021-11-01 | 2022-01-25 | 山西建筑工程集团有限公司 | Construction method for anchor rod to penetrate through pile group foundation |
| CN116956641A (en) * | 2023-09-19 | 2023-10-27 | 北京市第三建筑工程有限公司 | BIM technology-based foundation pit limb ancient tree root system protection method |
-
2020
- 2020-12-18 CN CN202023076244.8U patent/CN214427614U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113969589A (en) * | 2021-11-01 | 2022-01-25 | 山西建筑工程集团有限公司 | Construction method for anchor rod to penetrate through pile group foundation |
| CN113969589B (en) * | 2021-11-01 | 2023-08-25 | 山西建筑工程集团有限公司 | Construction method for anchor rod to penetrate pile group foundation |
| CN116956641A (en) * | 2023-09-19 | 2023-10-27 | 北京市第三建筑工程有限公司 | BIM technology-based foundation pit limb ancient tree root system protection method |
| CN116956641B (en) * | 2023-09-19 | 2023-12-29 | 北京市第三建筑工程有限公司 | BIM technology-based foundation pit limb ancient tree root system protection method |
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