Full-process automatic monitoring construction method for super-deep underground continuous wall in strong water-permeable stratum

Abstract

This invention relates to a method for the construction of ultra-deep diaphragm walls in highly permeable strata with fully automated monitoring throughout the entire process. Addressing the problems of low construction accuracy, easy collapse, and lack of real-time monitoring in ultra-deep diaphragm wall construction in highly permeable strata, this invention solves these problems through a collaborative approach of five technical systems: (1) a sealing wall technology system employing a hanging beam, a reserved post-pouring strip, and an inverted corbel structure to enhance impermeability; (2) a detachable steel cage support system using modular truss support to improve rigidity and hoisting safety; (3) a verticality ultrasonic detection system utilizing ultrasonic signals to achieve high-precision detection of the guide wall; (4) a steel-framed inner support system using adjustable supports to prevent cracking of the guide wall; and (5) an automated monitoring system integrating multiple sensors to monitor displacement and temperature in real time and providing cloud-based early warning. This invention, through the integration of multiple technologies, significantly improves construction efficiency and quality, is suitable for ultra-deep diaphragm wall construction under complex geological conditions, and has advantages such as strong impermeability, controllable deformation, and real-time early warning.

Description

Technical Field

[0001] This invention relates to a construction method for ultra-deep diaphragm walls with fully automated monitoring throughout the entire process in highly permeable strata. It belongs to the field of underground foundation pit technology and is applicable to the construction of ultra-deep diaphragm walls with fully automated monitoring throughout the entire process in complex construction environments and strata with severe water permeability. Background Technology

[0002] Diaphragm walls, as deep foundation pit support and seepage prevention structures, are widely used in high-rise buildings, subway tunnels, and water conservancy projects. With the continuous development of urban underground space, the demand for ultra-deep diaphragm walls is increasing, especially in highly permeable strata (such as sand and gravel layers), where the construction difficulty and technical requirements are significantly increased. The high permeability and instability of highly permeable strata pose severe challenges to the trenching accuracy, slurry wall protection effect, and wall quality of diaphragm walls. Traditional construction techniques are insufficient to effectively address these challenges, necessitating an efficient, precise, and adaptable construction method.

[0003] Existing ultra-deep diaphragm wall construction technologies in highly permeable strata have several shortcomings. First, the lack of a fully automated monitoring system makes it difficult to monitor trench verticality, 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 strata, 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 a fully automated monitoring technology for ultra-deep diaphragm wall construction is of great significance for improving construction efficiency and quality in highly permeable strata.

[0004] For the construction of ultra-deep diaphragm walls in highly permeable strata, there is an urgent need to propose a construction method that can improve construction efficiency while ensuring project quality and safety. Summary of the Invention

[0005] The purpose of this invention is to provide a fully automated monitoring system for the construction of ultra-deep diaphragm walls in highly permeable strata, thereby improving construction efficiency and ensuring project quality and safety. To achieve the above objective, the invention adopts the following technical solution:

[0006] A fully automated monitoring method for the construction of ultra-deep diaphragm walls in highly permeable strata, comprising the synergistic application of the following technical systems:

[0007] The underground continuous wall sealing wall technology system for pits in highly permeable strata achieves a stable connection between the sealing wall and the bottom slab through hanging beams, reserved post-pouring strips and inverted corbel structures, and the main reinforcement of the sealing wall is welded to the main reinforcement of the post-pouring strip;

[0008] The detachable steel cage space truss support deformation prevention and control technology system is to install a support platform consisting of steel pipe columns, legs, detachable diagonal support trusses, detachable transverse support trusses and buckles in the diaphragm wall steel cage, and to set support trusses, diagonal cross bars and end I-beams.

[0009] The verticality ultrasonic drilling detection technology system uses an ultrasonic signal transmitting unit fixed at the bottom of the foundation pit and a signal receiver above the guide wall to detect the verticality of the guide wall in real time. The signal is fed back to the control unit via a data transmission line.

[0010] The steel-framed inner support system for preventing cracking of the guide wall consists of steel profiles on both sides of the guide wall, with an inner support composed of inserts and sleeves installed between the steel profiles. The inserts are equipped with spring telescopic clips at the head and the sleeves have multiple rows of insertion holes.

[0011] The automated monitoring technology system for the entire construction process uses multi-functional sensors fixed to monitoring rods to monitor the displacement of the steel cage and the construction temperature in real time. The data is uploaded to the cloud monitoring platform via wireless communication and triggers an alarm.

[0012] Furthermore, the construction steps of the underground continuous wall sealing wall technology system for highly permeable strata pits include:

[0013] A hanging beam is installed between the sealing wall and the first base slab;

[0014] A pre-cast strip and an inverted corbel are set between the sealing wall and the second base slab, and the main reinforcement of the sealing wall and the main reinforcement of the post-cast strip are welded together.

[0015] Furthermore, the construction steps of the detachable steel cage space truss support deformation control technology system include:

[0016] The support platform is fixed to the diaphragm wall steel cage using clips;

[0017] A supporting truss and diagonal cross bars are installed inside the diaphragm wall reinforcement cage, and an end I-beam is installed on one side.

[0018] Furthermore, the construction steps of the verticality ultrasonic drilling testing technology system include:

[0019] The ultrasonic signal transmitting unit is fixed to the bottom of the pit using a support frame;

[0020] A signal receiving structure consisting of a crossbeam, a left support leg, and a right support leg is installed above the guide wall.

[0021] Furthermore, the construction steps of the steel-framed internal support system for preventing guide wall cracking include:

[0022] Steel profiles are installed on both sides of the guide wall;

[0023] The alignment position of the spring telescopic clip of the inner support with the sleeve insertion hole is adjusted according to the spacing of the steel profiles.

[0024] Furthermore, the construction steps of the fully automated monitoring technology system for the entire construction process include:

[0025] A multi-functional sensor is fixed on the monitoring rod to collect displacement and temperature data in real time.

[0026] Data is transmitted to the cloud monitoring platform via wireless communication protocols, and thresholds are set to trigger alarms.

[0027] Furthermore, in the underground continuous wall sealing wall technology system for pits in highly permeable strata, the lower hanging beam is a reinforced concrete structure, and the distance between the inverted corbel and the post-cast strip is dynamically adjusted according to the stratum permeability coefficient and the pit depth.

[0028] Furthermore, in the detachable steel cage space truss support deformation control technology system, the detachable diagonal support truss and the detachable transverse support truss are made of Q345B steel, and the buckles are high-strength bolt connections.

[0029] Furthermore, in the steel-framed inner support system for preventing guide wall cracking, the steel is hot-rolled H350×350 steel, and the adjustment range of the inner support is 1.5m-3.0m.

[0030] Furthermore, in the automated monitoring technology system for the entire construction process, the displacement measurement accuracy of the multi-functional sensor is 0.1mm, the temperature measurement accuracy is ±0.5℃, and the data sampling frequency is not less than 10Hz.

[0031] Compared with the prior art, the beneficial effects of the present invention are:

[0032] (1) The underground continuous wall sealing wall technology system of highly permeable strata pits has multiple structural synergistic effects, which effectively improves the overall stability and impermeability of the sealing wall, and is suitable for the waterproofing and support needs of highly permeable strata pits.

[0033] (2) The detachable steel cage space truss support deformation prevention and control technology system effectively prevents steel cage deformation through the synergistic effect of modular support platform and 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 steel cage during hoisting and use.

[0034] (3) The verticality ultrasonic drilling detection technology system realizes high-precision detection of the verticality of the guide wall by transmitting and receiving ultrasonic signals, combined with the support structure and data transmission, thereby improving construction quality and efficiency.

[0035] (4) The steel-framed internal support system for preventing guide wall cracking effectively prevents guide wall cracking through the synergistic effect of steel and adjustable internal support, improving construction flexibility and structural stability, and saving construction costs. Attached Figure Description

[0036] Figure 1 Schematic diagram of the technical system structure of underground continuous wall sealing wall for pits in highly permeable strata;

[0037] Figure 2 Detailed structural diagram of the support platform;

[0038] Figure 3 Schematic diagram of the system architecture of the detachable steel cage space truss support deformation prevention and control technology;

[0039] Figure 4 Schematic diagram of the verticality ultrasonic hole drilling detection technology system architecture;

[0040] Figure 5 Schematic diagram of the system structure of the steel-framed internal support structure for preventing cracking of the guide wall;

[0041] Figure 6 Detailed structural diagram of the internal support;

[0042] Figure 7 A schematic diagram of the architecture of automated monitoring technology for the entire construction process.

[0043] Explanation of reference numerals in the attached drawings: 1. First base plate; 2. Main reinforcement of the sealing wall; 3. Main reinforcement of the post-cast strip; 4. Second base plate; 5. Lower hanging beam; 6. Sealing wall; 7. Reserved post-cast strip; 8. Inverted corbel; 9. Demountable diagonal support truss; 10. Steel pipe column; 11. Demountable transverse support truss; 12. Support leg; 13. Support platform; 14. Support truss; 15. Diaphragm wall reinforcement cage; 16. Diagonal cross reinforcement; 17. Clip; 18. End I-beam; 19. Control unit; 20. Horizontal 21. Beam; 22. Left support leg; 23. Guide wall; 24. Ultrasonic signal transmitting unit; 25. Pit bottom; 26. Data transmission line; 27. Signal receiver; 28. Right support leg; 29. ​​Support frame; 30. Steel section; 31. Guide wall; 32. Internal support; 33. Insertion pipe; 34. Spring telescopic clamp; 35. Insertion hole; 36. Sleeve; 37. Cloud monitoring platform; 38. Alarm device; 39. Multifunctional sensor; 40. Fixing clamp; 41. Monitoring rod; 42. Road surface. Detailed Implementation

[0044] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0045] Those skilled in the art should understand that, in the disclosure of this application, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional 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, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limitations on this application.

[0046] Example 1

[0047] This method for automatically monitoring the entire process of constructing ultra-deep diaphragm walls in highly permeable strata includes the following steps:

[0048] S1. The core of the underground continuous wall sealing system for multi-pit pits in highly permeable strata lies in achieving a stable connection between the sealing wall 6 and the base slab through structures such as the lower beam 5, the reserved post-pouring strip 7, and the inverted corbel 8. In specific implementation, the lower beam 5 is set between the sealing wall 6 and the first base slab 1 to enhance the overall structure; the reserved post-pouring strip 7 and the inverted corbel 8 are set between the sealing wall 6 and the second base slab 4, and the tight connection between the sealing wall and the base slab is ensured by welding the main reinforcement 2 of the sealing wall to the main reinforcement 3 of the post-pouring strip.

[0049] S2. The core of the detachable steel cage space truss support deformation control technology system lies in improving the overall strength and deformation resistance of the diaphragm wall steel cage 15 through the support platform 13 and internal reinforcement structure. Specific implementation includes pre-assembling the support platform 13, which consists of steel pipe columns 10, legs 12, detachable diagonal support trusses 9, detachable transverse support trusses 11, and clips 17. The platform is fixed to the diaphragm wall steel cage 15 via clips 17, enabling rapid installation and disassembly. Simultaneously, a support truss 14 and diagonal cross bars 16 are installed inside the diaphragm wall steel cage 15, with an end I-beam 18 on one side to further enhance the overall structural stability.

[0050] S3. Install the verticality ultrasonic drilling detection technology system. First, place the ultrasonic signal transmitting unit 23 close to the guide wall 22 and fix it to the bottom 24 of the pit with the support frame 28 to ensure its stable position. Second, install the signal receiver 26 directly above the hole of the guide wall 22. The signal receiver 26 is fixed on the crossbeam 20. The crossbeam 20 has a left support leg 21 and a right support leg 27 on both sides and stands on the guide wall 22 to ensure the accuracy of signal reception. Then, the ultrasonic signal is emitted vertically along the guide wall 22. After the signal receiver 26 recognizes the signal, it feeds the data back to the control unit 19 through the data transmission line 25 to complete the detection of the verticality of the guide wall 22.

[0051] S4. The technical system for preventing cracking of the guide wall by installing steel-framed inner supports includes pre-installing steel profiles 29 tightly against the wall surface on both sides of the guide wall 30 as the main body of the support structure; then installing multiple inner supports 31 between the steel profiles 29. The inner support 31 consists of two parts: one part is a tube 32 with a spring telescopic clip 33 at the head, and the other part is a sleeve 35 with multiple rows of insertion holes 34. During construction, according to the actual width between the steel profiles 29, the spring telescopic clip 33 is inserted into the corresponding insertion hole 34 of the sleeve 35 to realize the length adjustment and fixation of the inner support 31, ensuring the stability and adaptability of the support.

[0052] S5. The automated monitoring technology system for the entire installation and construction process first involves installing a fixing clamp 39 on the monitoring rod 40 inserted into the foundation pit, and then fixing a multi-functional sensor 38 on the monitoring rod 40. The multi-functional sensor 38 includes a displacement sensor and a temperature sensor, which are used to monitor the lateral displacement of the diaphragm wall reinforcement cage 15 and the changes in internal temperature during construction in real time. Subsequently, the collected data is uploaded to the cloud monitoring platform 36 on the road surface 41 via a wireless communication protocol for data storage and analysis. If any abnormality is found in the monitoring data, the cloud monitoring platform 36 will trigger the alarm device 37 to issue an alarm so that timely countermeasures can be taken.

[0053] Example 2

[0054] Based on the same concept, this embodiment provides a construction structure for an ultra-deep underground continuous wall with full-process automatic monitoring in highly permeable strata, including a technical system for sealing underground continuous walls in highly permeable strata multi-pit underground walls, a technical system for preventing deformation of detachable steel cage space truss support, a technical system for detecting verticality using ultrasonic drilling, a technical system for preventing guide wall cracking using steel-framed inner supports, and a technical system for automatic monitoring of the entire construction process.

[0055] like Figure 1As shown, the underground continuous wall sealing wall technology system for a group of pits in highly permeable strata has a lower hanging beam 5 between the sealing wall 6 and the first base plate 1; and a reserved post-pouring strip 7 and an inverted corbel 8 structure between the sealing wall 6 and the second base plate 4. The main reinforcement 2 of the sealing wall and the main reinforcement 3 of the post-pouring strip are welded to make the overall structure tightly connected.

[0056] like Figure 2 , Figure 3 As shown, the detachable steel cage space truss support deformation control technology system includes a support platform 13 installed inside the diaphragm wall steel cage 15. The support platform 13 consists of steel pipe columns 10, legs 12, a detachable diagonal support truss 9, a detachable transverse support truss 11, and clips 17, and is fixed to the diaphragm wall steel cage 15 via clips 17. One side of the diaphragm wall steel cage 15 has an end I-beam 18, and internally it has a support truss 14 and diagonal cross bars 16 to increase the overall strength of the diaphragm wall steel cage 15. The detachable diagonal support truss 19 and the detachable transverse support truss 11 are made of Q345B steel, and the clips 17 are high-strength bolt connections.

[0057] like Figure 4 As shown, in the verticality ultrasonic drilling detection system, the ultrasonic signal transmitting unit 23 is close to the guide wall 22 and fixed to the bottom 24 of the pit by the support frame 28. When the ultrasonic signal is emitted vertically along the guide wall 22, it is recognized by the signal receiver 26 directly above the borehole and fed back to the control unit 19 through the data transmission line 25 to complete the detection of the verticality of the guide wall 22. The signal receiver 26 is fixed on the crossbeam 20, and the crossbeam 20 has a left support leg 21 and a right support leg 27 on both sides, standing on the guide wall 22.

[0058] like Figure 5 , Figure 6 As shown, the steel-framed internal support system for preventing guide wall cracking involves steel sections 29 tightly attached to the guide wall 30 on both sides, with multiple internal supports 31 between the steel sections 29. Each internal support 31 consists of two parts: a tube 32 with a spring-loaded telescopic clamp 33 at its head, and a sleeve 35 with multiple rows of insertion holes 34. During connection, the spring-loaded telescopic clamp 33 can be fixed in different insertion holes 34 according to the actual width between the steel sections 29, achieving multiple uses from a single support. The steel section 29 is hot-rolled H350×350 steel, and the adjustment range of the internal support 31 is 1.5m-3.0m.

[0059] like Figure 7As shown, the automated monitoring system for the entire construction process includes a fixing clamp 39 on the monitoring rod 40 inserted into the foundation pit, which holds a multi-functional sensor 38. The multi-functional sensor 38 includes a displacement sensor and a temperature sensor, used to monitor the lateral displacement of the diaphragm wall reinforcement cage 15 and the internal temperature changes during the diaphragm wall construction. The collected data is uploaded to a cloud monitoring platform 36 on the road surface 41 via a wireless communication protocol for storage and processing. Any abnormalities will trigger an alarm device 37. The displacement measurement accuracy of the multi-functional sensor 38 is 0.1 mm, the temperature measurement accuracy is ±0.5℃, and the data sampling frequency is not less than 10 Hz.

[0060] The parts not described in detail in this application are prior art, and therefore are not described in detail in this application.

[0061] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.

[0062] Although this document uses a significant amount of technical terminology, the possibility of using other terms is not excluded. These terms are used merely to facilitate the description and explanation of the nature of this application; interpreting them as any additional limitation would be contrary to the spirit of this application.

[0063] This application is not limited to the above-described preferred embodiments. Anyone can derive other products in various forms under the guidance of this application. However, regardless of any changes made to their shape or structure, any technical solution that is the same as or similar to that of this application falls within the protection scope of this application.

Claims

1. A method for automatically monitoring the entire construction process of ultra-deep diaphragm walls in highly permeable strata, characterized in that... This includes the collaborative application of the following technology systems: The underground continuous wall sealing system for pits in highly permeable strata includes: A lower beam (5) is installed between the sealing wall (6) and the first base plate (1); A reserved post-cast strip (7) and an inverted corbel (8) are set between the sealing wall (6) and the second base plate (4), and the main reinforcement (2) of the sealing wall and the main reinforcement (3) of the post-cast strip are welded together; the sealing wall (6) and the base plate are stably connected through the structure of the hanging beam (5), the reserved post-cast strip (7) and the inverted corbel (8), and the main reinforcement (2) of the sealing wall and the main reinforcement (3) of the post-cast strip are welded together; the hanging beam (5) is a reinforced concrete structure, and the distance between the inverted corbel (8) and the reserved post-cast strip (7) is dynamically adjusted according to the soil permeability coefficient and the depth of the foundation pit; The deformation prevention and control technology system of detachable steel cage space truss support is installed in the diaphragm wall steel cage (15) and a support platform (13) consisting of steel pipe column (10), support leg (12), detachable diagonal support truss (9), detachable transverse support truss (11) and buckle (17). Support truss (14), diagonal cross bar (16) and end I-beam (18) are also provided. The detachable diagonal support truss (9) and detachable transverse support truss (11) are made of Q345B steel and the buckle (17) is a high-strength bolt connector. The verticality ultrasonic drilling detection technology system uses an ultrasonic signal transmitting unit (23) fixed at the bottom of the pit (24) and a signal receiver (26) above the guide wall (22) to detect the verticality of the guide wall in real time. The signal is fed back to the control unit (19) via a data transmission line (25). The ultrasonic signal transmitting unit (23) is fixed at the bottom of the pit (24) by a support frame (28), and the signal receiver (26) is installed on a signal receiving structure composed of a crossbeam (20), a left support leg (21), and a right support leg (27). The steel-framed inner support system for preventing cracking of the guide wall consists of steel sections (29) on both sides of the guide wall (30), and an inner support (31) consisting of a tube (32) and a sleeve (35) installed between the steel sections. The tube head is provided with a spring telescopic clip (33), and the sleeve is provided with multiple rows of insertion holes (34). The steel section (29) is hot-rolled H350×350 steel, and the adjustment range of the inner support (31) is 1.5m-3.0m. 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 multi-functional sensor (38) fixed to the monitoring rod (40). The data is uploaded to the cloud monitoring platform (36) via wireless communication and triggers an alarm (37). The displacement measurement accuracy of the multi-functional sensor (38) is 0.1 mm, the temperature measurement accuracy is ±0.5℃, and the data sampling frequency is not less than 10 Hz.

2. The construction method according to claim 1, characterized in that, The construction steps of the detachable steel cage space truss support deformation control technology system include: The support platform (13) is fixed to the diaphragm wall steel cage (15) by means of the buckle (17); A supporting truss (14) and diagonal cross bars (16) are installed inside the diaphragm wall reinforcement cage (15), and an end I-beam (18) is installed on one side.

3. The construction method according to claim 1, characterized in that, The construction steps of the steel-framed inner support system for preventing guide wall cracking include: Steel sections (29) are installed on both sides of the guide wall (30); The spring telescopic clip (33) of the inner support (31) and the sleeve insertion hole (34) are adjusted according to the spacing of the steel profiles.

4. The construction method according to claim 1, characterized in that, The construction steps of the automated monitoring technology system for the entire construction process include: A multi-functional 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 via a wireless communication protocol (36), and a threshold is set to trigger an alarm (37).

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