Construction method of ultra-deep underground diaphragm wall capable of automatically monitoring whole process of strong permeable stratum

Abstract

The invention relates to a method for automatically monitoring construction of an ultra-deep underground diaphragm wall in the whole process of a strong permeable stratum, and aims to solve the problems that the ultra-deep underground diaphragm wall in the strong permeable stratum is low in construction precision, easy to collapse, lack of real-time monitoring and the like. Five technical systems are used for synergistically solving the problems that (1) a lower suspended beam, a reserved post-cast strip and an inverted bracket structure are adopted in the blocking wall technical system, so that the impermeability is enhanced; (2) the detachable reinforcement cage supporting system improves rigidity and hoisting safety through modular truss supporting; (3) the verticality ultrasonic detection system realizes high-precision detection of the guide wall by using an ultrasonic signal; (4) the structural steel wall-attached inner bracket system prevents the guide wall from cracking through adjustable support; and (5) the automatic monitoring system integrates multiple sensors to monitor displacement and temperature in real time and performs cloud early warning. Through multi-technology fusion, the construction efficiency and quality are remarkably improved, and the method is suitable for ultra-deep underground diaphragm wall construction under complex geological conditions and has the advantages of being high in anti-permeability, controllable in deformation, capable of achieving real-time early warning and the like.

Description

Technical Field

[0001] The present invention relates to a method for constructing ultra-deep underground continuous walls with full-process automatic monitoring in highly permeable strata, belonging to the technical field of underground foundation pits, and is suitable for constructing ultra-deep underground continuous walls with full-process automatic monitoring in complex construction environments and severe permeable strata. Background Art

[0002] Underground diaphragm walls (diaphragm walls) serve as deep foundation pit support and anti-seepage structures and are widely used in high-rise buildings, subway tunnels, and water conservancy projects. With the continued development of urban underground spaces, the demand for ultra-deep diaphragm walls is increasing, especially in highly permeable strata (such as sand and gravel), where construction difficulty and technical requirements are significantly increased. The high permeability and instability of highly permeable strata pose significant challenges to the trenching accuracy, slurry protection, and wall quality of diaphragm walls. Traditional construction techniques are unable to effectively address this challenge, and an efficient, precise, and adaptable construction method is urgently needed.

[0003] Existing ultra-deep diaphragm wall construction technology in highly permeable formations has numerous shortcomings. First, the lack of a fully automated monitoring system makes it difficult to monitor the verticality of the trench, the lateral displacement of the diaphragm wall reinforcement cage, and temperature changes during construction in real time, resulting in low construction accuracy and efficiency. Second, traditional slurry wall protection technology is prone to failure in highly permeable formations, causing trench wall collapse and slurry loss, affecting construction safety. Furthermore, existing technologies have poor adaptability to complex geological conditions, making it difficult to achieve efficient and stable construction. Therefore, developing an ultra-deep diaphragm wall construction technology with fully automated monitoring is of great significance for improving construction efficiency and quality in highly permeable formations.

[0004] In order to automatically monitor the entire process of ultra-deep underground continuous wall construction in highly permeable strata, it is urgent to propose a construction method that can improve construction efficiency while ensuring project quality and safety. Summary of the Invention

[0005] The present invention aims to provide a system for automatically monitoring the entire process of ultra-deep underground continuous wall construction in highly permeable strata, thereby improving the efficiency of ultra-deep underground continuous wall construction in highly permeable strata and ensuring project quality and safety. To achieve the above objectives, the present invention employs the following technical solutions: A method for fully automatically monitoring the construction of ultra-deep underground continuous walls in highly permeable strata includes the coordinated application of the following technical systems: The underground continuous wall blocking wall technology system for highly permeable strata group pits uses hanging beams, reserved post-cast strips, and inverted bracket structures to achieve a stable connection between the blocking wall and the base plate. The main reinforcement of the blocking wall is welded to the main reinforcement of the post-cast strip. The detachable steel cage space truss support deformation prevention and control technology system installs a support platform composed of steel pipe columns, support legs, detachable diagonal support trusses, detachable transverse support trusses and clips in the ground-connected wall steel cage, and also sets support trusses, diagonal cross bars and end I-beams; The verticality ultrasonic hole detection technology system detects the verticality of the guide wall in real time through an ultrasonic signal transmitting unit fixed at the bottom of the foundation pit and a signal receiver above the guide wall. The signal is fed back to the control unit via a data transmission line. The technical system of steel wall-mounted internal support to prevent guide wall cracking is to set steel on both sides of the guide wall, and install internal supports consisting of inserts and sleeves between the steel sections. The inserts are equipped with spring telescopic clamps at the heads, and the sleeves are equipped with multiple rows of sockets. The automated monitoring technology system for the entire construction process monitors the displacement of the steel cage and construction temperature in real time through multi-functional sensors fixed to the monitoring rods. The data is uploaded to the cloud monitoring platform via wireless communication and triggers an alarm.

[0006] Furthermore, the construction steps of the underground continuous wall sealing wall technology system for highly permeable stratum group pits include: A lower hanging beam is provided between the blocking wall and the first bottom plate; A reserved post-cast strip and an inverted corbel are set between the blocking wall and the second bottom plate, and the main reinforcement of the blocking wall and the main reinforcement of the post-cast strip are welded.

[0007] Furthermore, the construction steps of the detachable steel cage space truss support deformation prevention and control technology system include: Fix the support platform to the ground-connected wall reinforcement cage through buckles; Support trusses and oblique cross bars are set inside the ground-connected wall reinforcement cage, and end I-beams are set on one side.

[0008] Furthermore, the construction steps of the verticality ultrasonic hole detection technology system include: Fix the ultrasonic signal transmitting unit to the bottom of the foundation pit through a support frame; A signal receiving structure consisting of a crossbeam, a left support leg and a right support leg is installed above the guide wall.

[0009] Furthermore, the construction steps of the technical system for preventing guide wall cracking by using steel wall-mounted internal supports include: Install steel sections on both sides of the guide wall; Adjust the matching position of the spring telescopic clamp of the inner support and the sleeve insertion hole according to the spacing of the steel sections.

[0010] Furthermore, the construction steps of the full-process automated monitoring technology system include: A multifunctional sensor is fixed on the monitoring rod to collect displacement and temperature data in real time; The data is transmitted to the cloud monitoring platform via wireless communication protocols, and thresholds are set to trigger alarms.

[0011] Furthermore, in the underground continuous wall sealing wall technology system for group pits in highly permeable strata, the lower hanging beam is a reinforced concrete structure, and the spacing between the inverted corbel and the post-cast strip is dynamically adjusted according to the stratum permeability coefficient and the foundation pit depth.

[0012] Furthermore, in the detachable steel cage space truss support deformation prevention and control technology system, the detachable diagonal support truss and the detachable transverse support truss are made of Q345B steel, and the clips are high-strength bolt connectors.

[0013] Furthermore, in the technical system of preventing guide wall cracking with steel wall-attached internal support frames, the steel sections are hot-rolled H350×350 steel sections, and the adjustment range of the internal support is 1.5m-3.0m.

[0014] Furthermore, in the automated monitoring technology system for the entire construction process, the displacement measurement accuracy of the multi-function sensor is 0.1mm, the temperature measurement accuracy is ±0.5℃, and the data sampling frequency is not less than 10Hz.

[0015] Compared with the prior art, the present invention has the following beneficial effects: (1) The technical system of underground continuous wall sealing wall for highly permeable strata has multiple structural synergistic effects, which effectively improves the overall stability and anti-seepage performance of the sealing wall, and is suitable for the waterproofing and support needs of highly permeable strata group pits; (2) The detachable steel cage space truss support deformation prevention and control technology system effectively prevents and controls the deformation of the steel cage through the synergy of the modular support platform and the internal reinforcement structure. It is suitable for efficient construction and quality control in complex construction environments, and can also ensure the stability and safety of the steel cage during hoisting and use. (3) The verticality ultrasonic hole detection technology system achieves high-precision detection of the verticality of the guide wall through the emission and reception of ultrasonic signals, combined with the support structure and data transmission, thus improving the construction quality and efficiency; (4) The technical system of preventing guide wall cracking by using steel section internal support frame can effectively prevent guide wall cracking through the synergistic effect of steel section and adjustable internal support, thereby improving construction flexibility and structural stability and saving construction costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Schematic diagram of the technical system structure of underground continuous wall sealing wall in highly permeable stratum group pits; Figure 2 Schematic diagram of the detailed structure of the support platform; Figure 3 Schematic diagram of the system architecture of the detachable steel cage space truss support deformation prevention and control technology; Figure 4 Schematic diagram of the verticality ultrasonic hole detection technology system architecture; Figure 5 Schematic diagram of the technical system structure of the steel wall-mounted internal support frame to prevent the guide wall from cracking; Figure 6 Schematic diagram of the internal support detail structure; Figure 7 Schematic diagram of the technical architecture for automated monitoring of the entire construction process.

[0017] Explanation of reference numerals: 1. First base plate; 2. Main reinforcement of blocking wall; 3. Main reinforcement of post-casting strip; 4. Second base plate; 5. Lower hanging beam; 6. Blocking wall; 7. Reserved post-casting strip; 8. Inverted corbel; 9. Detachable oblique support truss; 10. Steel pipe column; 11. Detachable transverse support truss; 12. Support foot; 13. Support platform; 14. Support truss; 15. Ground-connected wall reinforcement cage; 16. Oblique cross reinforcement; 17. Buckle; 18. End I-beam; 19. Control unit; 20. Transverse Beam; 21. Left support leg; 22. Guide wall; 23. Ultrasonic signal transmitting unit; 24. Bottom of foundation pit; 25. Data transmission line; 26. Signal receiver; 27. Right support leg; 28. Support frame; 29. ​​Steel section; 30. Guide wall; 31. Internal support; 32. Insert pipe; 33. Spring expansion clip; 34. Socket; 35. Casing; 36. Cloud monitoring platform; 37. Alarm device; 38. Multi-function sensor; 39. Fixing clamp; 40. Monitoring rod; 41. Road surface. DETAILED DESCRIPTION

[0018] The following will be combined with the accompanying drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of this application.

[0019] Those skilled in the art should understand that, in the disclosure of this application, the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above terms cannot be understood as limiting this application.

[0020] Example 1 The present invention relates to a method for automatically monitoring the construction of an ultra-deep underground continuous wall in a highly permeable stratum during the entire process, comprising the following steps: S1. The core of the technical system for installing underground continuous walls in highly permeable strata is to achieve a stable connection between the blocking wall 6 and the base plate through structures such as lower hanging beams 5, reserved post-casting strips 7, and inverted corbels 8. In specific implementation, lower hanging beams 5 are installed between the blocking wall 6 and the first base plate 1 to enhance the integrity of the structure; reserved post-casting strips 7 and inverted corbels 8 are installed between the blocking wall 6 and the second base plate 4, and the main reinforcement 2 of the blocking wall is welded to the main reinforcement 3 of the post-casting strip to ensure a tight connection between the blocking wall and the base plate.

[0021] S2. Install a detachable steel cage spatial truss support deformation prevention and control technology system. Its core is to improve the overall strength and deformation resistance of the ground-connected wall steel cage 15 through the support platform 13 and internal reinforcement structure. The specific implementation includes pre-assembling the support platform 13, which consists of a steel pipe column 10, support legs 12, detachable diagonal support trusses 9, detachable transverse support trusses 11, and clips 17. The support platform 13 is fixed to the ground-connected wall steel cage 15 by the clips 17 to achieve rapid installation and removal. At the same time, the support trusses 14 and diagonal cross bars 16 are installed inside the ground-connected wall steel cage 15, and an end I-beam 18 is installed on one side to further enhance the stability of the overall structure.

[0022] S3. Install the verticality ultrasonic hole-forming detection technology system. First, place the ultrasonic signal transmitting unit 23 close to the wall of the guide wall 22 and fix it to the bottom of the foundation pit 24 through the support frame 28 to ensure its stable position; secondly, install the signal receiver 26 just above the hole of the guide wall 22. The signal receiver 26 is fixed on the beam 20. The left support leg 21 and the right support leg 27 are provided on both sides of the beam 20, and stand on the guide wall 22 to ensure the accuracy of signal reception; then, the ultrasonic signal is emitted in the vertical direction of the guide wall 22. After the signal receiver 26 recognizes the signal, it feeds back the data to the control unit 19 through the data transmission line 25 to complete the detection of the verticality of the guide wall 22.

[0023] S4. The technical system for installing steel-section wall-attached internal supports to prevent guide wall cracking includes pre-installing steel sections 29 close to the wall surface on both sides of the guide wall 30 as the main body of the supporting structure; then installing multiple internal supports 31 between the steel sections 29. The internal supports 31 are composed of two parts, one part is a plug 32 with a spring telescopic clip 33 on the head, and the other part is a sleeve 35 with multiple rows of sockets 34. During construction, the spring telescopic clip 33 is inserted into the corresponding socket 34 of the sleeve 35 according to the actual width between the steel sections 29 to achieve length adjustment and fixation of the internal supports 31, thereby ensuring the stability and adaptability of the support.

[0024] S5. Install the automated monitoring technology system for the entire construction process. First, install a fixing clamp 39 on the monitoring rod 40 inserted into the foundation pit, and fix the multifunctional sensor 38 on the monitoring rod 40. The multifunctional sensor 38 includes a displacement sensor and a temperature sensor for real-time monitoring of the lateral displacement of the ground-connected wall reinforcement cage 15 and the changes in the internal temperature during construction. The collected data is then uploaded to the cloud monitoring platform 36 on the road surface 41 through a wireless communication protocol for data storage and analysis. If the monitoring data is abnormal, the cloud monitoring platform 36 will trigger the alarm device 37 to sound an alarm so that timely response measures can be taken.

[0025] Example 2 Based on the same concept, this embodiment provides a construction structure for ultra-deep underground continuous walls that automatically monitor the entire process in highly permeable strata, including a technical system for sealing underground continuous walls in group pits of highly permeable strata, a technical system for preventing and controlling deformation of detachable steel cage space truss supports, a technical system for ultrasonic hole drilling detection of verticality, a technical system for preventing cracking of guide walls by steel wall-attached internal supports, and a technical system for automated monitoring of the entire construction process.

[0026] like Figure 1 As shown, the underground continuous wall sealing wall technology system for a group of pits in highly permeable strata is provided with a lower hanging beam 5 between the sealing wall 6 and the first bottom plate 1; a reserved post-casting strip 7 and an inverted corbel 8 structure are provided between the sealing wall 6 and the second bottom plate 4, wherein the main reinforcement 2 of the sealing wall and the main reinforcement 3 of the post-casting strip are welded to tightly connect the overall structure.

[0027] like Figure 2 、 Figure 3 As shown, the detachable steel cage spatial truss support deformation prevention and control technology system includes a support platform 13 installed within the ground-connected wall reinforcement cage 15. The support platform 13 consists of steel pipe columns 10, support legs 12, detachable diagonal support trusses 9, detachable transverse support trusses 11, and clips 17. The clips 17 secure the support platform 13 to the ground-connected wall reinforcement cage 15. An end I-beam 18 is installed on one side of the ground-connected wall reinforcement cage 15, while support trusses 14 and diagonal cross bars 16 are installed internally to increase the overall strength of the ground-connected wall reinforcement cage 15. The detachable diagonal support trusses 19 and detachable transverse support trusses 11 are made of Q345B steel, and the clips 17 are high-strength bolt connectors.

[0028] like Figure 4As shown in the figure, the ultrasonic hole-drilling verticality detection technology system has an ultrasonic signal transmitting unit 23 positioned close to the guide wall 22 and secured to the foundation pit floor 24 via a support frame 28. The ultrasonic signal, emitted vertically along the guide wall 22, is detected by a signal receiver 26 directly above the hole opening and fed back to the control unit 19 via a data transmission line 25, completing the verticality detection of the guide wall 22. The signal receiver 26 is secured to a crossbeam 20, which is flanked by a left support leg 21 and a right support leg 27, which stand parallel to the guide wall 22.

[0029] like Figure 5 、 Figure 6 As shown, the steel wall-mounted internal support system prevents cracking in guide walls. Steel sections 29 are installed on both sides of the guide wall 30, closely adhering to the wall surface. Multiple internal supports 31 are positioned between these sections. These internal supports 31 consist of two parts: a plug-in tube 32 with a spring-loaded clamp 33 at the head, and a sleeve 35 with multiple rows of sockets 34. These spring-loaded clamps 33 can be positioned in different sockets 34 depending on the actual width of the space between the steel sections 29, achieving multiple uses for one support. The steel sections 29 are hot-rolled H350×350 steel, and the internal supports 31 have an adjustable range of 1.5m to 3.0m.

[0030] like Figure 7 As shown, the automated monitoring technology system for the entire construction process features a fixed clamp 39 on a monitoring rod 40 inserted into the foundation pit, securing a multifunctional sensor 38. The multifunctional sensor 38 includes both a displacement sensor and a temperature sensor, which monitor the lateral displacement of the ground-connected wall reinforcement cage 15 and internal temperature changes during construction. The collected data is uploaded to a cloud-based monitoring platform 36 on the road surface 41 via a wireless communication protocol for storage and processing. Any abnormalities trigger an alarm device 37. The multifunctional sensor 38 has a displacement measurement accuracy of 0.1 mm and a temperature measurement accuracy of ±0.5°C. The data sampling frequency is no less than 10 Hz.

[0031] The parts not described in detail in this application are prior art, so this application does not describe them in detail.

[0032] It is to be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the elements may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0033] Although this document uses a lot of professional terms, it does not exclude the possibility of using other terms. These terms are used only to more conveniently describe and explain the essence of this application; interpreting them as any additional restrictions is contrary to the spirit of this application.

[0034] This application is not limited to the above-mentioned optimal implementation method. Anyone can derive various other forms of products based on the inspiration of this application. However, no matter what changes are made in their shape or structure, any technical solution that is the same or similar to that of this application falls within the scope of protection of this application.

Claims

1. A method for fully automatic monitoring of ultra-deep underground continuous wall construction in highly permeable strata, characterized in that Including the coordinated application of the following technical systems: A technical system for underground continuous wall sealing wall in a highly permeable stratum group pit, wherein a sealing wall (6) is firmly connected to a bottom plate through a lower hanging beam (5), a reserved post-casting strip (7) and an inverted corbel (8) structure, wherein the main reinforcement of the sealing wall (2) is welded to the main reinforcement of the post-casting strip (3); A detachable steel cage space truss support deformation prevention and control technology system is provided, wherein a support platform (13) consisting of a steel pipe column (10), a support leg (12), a detachable oblique support truss (9), a detachable transverse support truss (11) and a buckle (17) is installed in a ground-connected wall steel cage (15), and a support truss (14), oblique cross bars (16) and an end I-beam (18) are provided. The verticality ultrasonic hole-forming detection technology system detects the verticality of the guide wall in real time through an ultrasonic signal transmitting unit (23) fixed on the bottom of the foundation pit (24) and a signal receiver (26) above the guide wall (22), and the signal is fed back to the control unit (19) via a data transmission line (25); A technical system for preventing cracking of a guide wall by using a steel wall-attached internal support frame, wherein steel sections (29) are arranged on both sides of a guide wall (30), and an internal support (31) consisting of an insert (32) and a sleeve (35) is installed between the steel sections, wherein a spring telescopic clamp (33) is provided at the head of the insert, and a plurality of rows of insert holes (34) are provided on the sleeve; The automated monitoring technology system for the entire construction process monitors the displacement of the steel cage and the construction temperature in real time through a multifunctional sensor (38) fixed to a monitoring rod (40). The data is uploaded to a cloud monitoring platform (36) via wireless communication and triggers an alarm (37).

2. The construction method according to claim 1, characterized in that: The construction steps of the underground continuous wall sealing wall technology system for highly permeable stratum group pits include: A lower hanging beam (5) is provided between the blocking wall (6) and the first bottom plate (1); A reserved post-casting strip (7) and an inverted corbel (8) are provided between the blocking wall (6) and the second bottom plate (4), and the main reinforcement of the blocking wall (2) and the main reinforcement of the post-casting strip (3) are welded.

3. The construction method according to claim 1, characterized in that: The construction steps of the detachable steel cage space truss support deformation prevention and control technical system include: Fixing the support platform (13) to the ground-connected wall reinforcement cage (15) by means of a buckle (17); A supporting truss (14) and oblique cross bars (16) are arranged inside the ground-connected wall reinforcement cage (15), and an end I-beam (18) is arranged on one side.

4. The construction method according to claim 1, characterized in that: The construction steps of the verticality ultrasonic hole detection technology system include: Fixing the ultrasonic signal transmitting unit (23) to the bottom of the foundation pit (24) via a support frame (28); A signal receiving structure consisting of a crossbeam (20), a left support leg (21) and a right support leg (27) is installed above the guide wall (22).

5. The construction method according to claim 1, characterized in that: The construction steps of the technical system for preventing guide wall cracking by using the steel wall-attached inner support frame include: Installing steel sections (29) on both sides of the guide wall (30); The matching position of the spring telescopic clamp (33) of the inner support (31) and the sleeve insertion hole (34) is adjusted according to the spacing of the steel sections.

6. The construction method according to claim 1, characterized in that: The construction steps of the full-process automated monitoring technology system for construction include: A multifunctional sensor (38) is fixed on the monitoring rod (40) to collect displacement and temperature data in real time; The data is transmitted to the cloud monitoring platform (36) via wireless communication protocol, and a threshold is set to trigger an alarm (37).

7. The construction method according to any one of claims 1 to 6, characterized in that: In the highly permeable stratum group pit underground continuous wall sealing wall technology system, the lower hanging beam (5) is a reinforced concrete structure, and the spacing between the inverted corbel (8) and the post-casting strip (7) is dynamically adjusted according to the stratum permeability coefficient and the foundation pit depth.

8. The construction method according to any one of claims 1 to 6, characterized in that: In the detachable steel cage space truss support deformation prevention and control technical system, the detachable oblique support truss (9) and the detachable transverse support truss (11) are made of Q345B steel, and the buckle (17) is a high-strength bolt connector.

9. The construction method according to any one of claims 1 to 6, characterized in that: In the technical system for preventing cracking of the guide wall by using a steel section wall internal support frame, the steel section (29) is a hot-rolled H350×350 steel section, and the adjustment range of the internal support (31) is 1.5m-3.0m.

10. The construction method according to any one of claims 1 to 6, characterized in that: In the construction process automation monitoring technology system, the displacement measurement accuracy of the multifunctional sensor (38) is 0.1 mm, the temperature measurement accuracy is ±0.5°C, and the data sampling frequency is not less than 10 Hz.

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