Closed water test device used under condition of slab staggering of rectangular jacking pipe

Abstract

The invention discloses a closed water test device used under the condition of slab staggering of a rectangular jacking pipe, and the device comprises two groups of pipe joints which are in horizontal butt joint; the sealing mechanism comprises two sets of waterproof frames which are symmetrically arranged, the two sets of waterproof frames are fixed to the two sets of pipe joints correspondingly, a water stop belt is arranged between the two sets of waterproof frames, and an annular water injection cavity is formed between the two sets of waterproof frames and the water stop belt; the loading mechanism comprises a fixing assembly and a lifting assembly; the water pressure monitoring unit is mounted on one group of waterproof frames and is used for monitoring the water pressure in the water injection cavity; the pressurizing assembly is communicated with the water injection cavity; and the lifting assembly, the water pressure monitoring unit and the pressurizing assembly are all connected with the terminal control system. According to the invention, the closed water performance under different slab staggering conditions can be effectively simulated, and a reliable sealing performance detection means is provided for pipe jacking engineering under complex geological conditions.

Description

Technical Field

[0001] The invention relates to the technical field of rectangular pipe jacking tunnel waterproofing, in particular to a water-tightness test device used for rectangular pipe jacking tunnels under misaligned conditions. Background Art

[0002] Currently, most tunnel water-tightness tests are based on internal pressurization devices and do not consider the soil conditions surrounding the tunnel. The test device mainly consists of a tunnel model, water-stopping components, a pressurization device, and monitoring equipment. After the closed model is fully soaked in water, water pressure is directly injected into the model through the pressurization device, causing the model surface to deform. Sensors installed at the joints monitor the opening of the joints, while the outer surface of the tunnel is observed to determine whether water leakage has occurred. This internal pressurization water-tightness test method has been successfully applied to the waterproofing testing of immersed tube tunnels and prefabricated integrated pipeline corridors.

[0003] Existing internally pressurized water-tightness test devices are usually placed directly on a fixed flat foundation, without considering the impact of misalignment between tunnel pipe sections on their waterproof performance. In actual projects, rectangular jacking tunnels have a large axial length and inevitably pass through different soil layers. Combined with different foundation treatment methods, the mechanical properties of the soil vary, and uneven foundation settlement often occurs, causing misalignment between pipe sections, further affecting the waterproof performance of the pipe joints. On the other hand, existing water-tightness test devices use internal pressurization and lack simulation of the actual external water pressure on the pipe sections, which may lead to poor results in the model test reflecting the on-site pipe section opening and sealing performance.

[0004] Based on the above technical problems, the present invention provides a water-tightness test device for rectangular pipe jacking under misalignment conditions. Summary of the Invention

[0005] The purpose of the present invention is to provide a water-tightness test device for rectangular jacking pipes under misaligned conditions, so as to solve the problems existing in the prior art.

[0006] To achieve the above-mentioned object, the present invention provides the following solution: The present invention provides a closed water test device for rectangular pipe jacking under misalignment conditions, comprising:

[0007] Pipe segments, wherein two groups of pipe segments are provided, and the two groups of pipe segments are horizontally butted against each other;

[0008] A closing mechanism comprising two symmetrically arranged waterproof frames, the two sets of waterproof frames being fixed to the two sets of pipe segments, respectively, a waterstop being provided between the two sets of waterproof frames, the waterstop being fixed to the outer surfaces of the waterproof frames via an anchoring assembly, and an annular water injection cavity being formed between the two sets of waterproof frames and the waterstop;

[0009] A loading mechanism, comprising a fixing assembly and a lifting assembly, wherein the fixing assembly is mounted on the bottom of one group of the pipe segments, and the lifting assembly is mounted on the bottom of the other group of the pipe segments;

[0010] a water pressure monitoring unit, mounted on one of the waterproof frames, for monitoring the water pressure in the water injection cavity;

[0011] a pressurizing assembly, the pressurizing assembly being in communication with the water injection chamber;

[0012] The terminal control system, the lifting component, the water pressure monitoring unit, and the pressurizing component are all connected to the terminal control system.

[0013] According to the closed water test device for rectangular jacking pipe misalignment conditions provided by the present invention, the waterproof frame includes four groups of frame surfaces, and the frame surfaces include a first waterproof steel plate, a second waterproof steel plate, a cover plate and a through bolt. The second waterproof steel plate is arranged between the first waterproof steel plate and the cover plate, and the through bolt passes through the cover plate and the first waterproof steel plate and is threadedly connected to a fixing nut.

[0014] According to the water-tightness test device for rectangular jacking pipe misalignment conditions provided by the present invention, the anchoring assembly includes an adjusting bolt, a mounting clip and a pressure plate, the mounting clip is fixed to the pressure plate, the adjusting bolt passes through the pressure plate and is vertically threaded on the outer wall of the cover plate, the adjusting bolt is rotatably connected to the pressure plate, the waterstop is arranged between the clip plate and the cover plate, and the clip plate abuts against the waterstop.

[0015] According to the water-tightness test device for rectangular pipe jacking under misalignment conditions provided by the present invention, the first waterproof steel plate is fixed to the outer wall of the pipe segment by fixing screws.

[0016] According to the water-tightness test device for rectangular pipe jacking under misalignment conditions provided by the present invention, the fixing assembly includes a fixing seat, and the fixing seat is fixed to the bottom of one group of the pipe segments.

[0017] According to the water-tightness test device for rectangular pipe jacking under misaligned conditions provided by the present invention, the lifting assembly includes a hydraulic lifting seat, and the hydraulic lifting seat is fixed to the bottom of another group of pipe segments.

[0018] According to the water-tightness test device for rectangular pipe jacking under misalignment conditions provided by the present invention, the water pressure monitoring unit includes a water pressure gauge, and the water pressure gauge is installed on one group of the second waterproof steel plates.

[0019] According to the water-tightness test device for rectangular jacking pipe misalignment conditions provided by the present invention, the pressurizing component includes a pressurizing pump, a high-pressure pipe is installed at the output end of the pressurizing pump, a valve is installed on the high-pressure pipe, and one end of the high-pressure pipe passes through one group of the second waterproof steel plates and extends into the water injection cavity.

[0020] According to the water-tightness test device for rectangular pipe jacking under misalignment conditions provided by the present invention, the waterstop is an OMEGA rubber waterstop.

[0021] According to the closed water test device for rectangular pipe jacking under misaligned conditions provided by the present invention, an F-type socket joint is provided between the two groups of pipe sections, and the two pipe sections are butt-jointed via the F-type socket joint.

[0022] The present invention discloses the following technical effects:

[0023] 1) In actual rectangular pipe jacking construction, geological conditions are complex and changeable, which can easily lead to varying degrees of misalignment in pipe joints. This water-tightness test device, through the lifting assembly in the loading mechanism, can flexibly adjust the joint state of the pipe joints, effectively simulating the water-tightness performance under different misalignment conditions. This provides a reliable means of testing the sealing performance of pipe jacking projects under complex geological conditions, ensuring project quality and safety.

[0024] 2) By analyzing water-tightness test data under different pipe joint conditions, we can gain a deeper understanding of how the sealing performance of pipe joints changes under varying degrees of misalignment. This data provides an important reference for pipe joint design, helping to optimize the joint's structure, dimensional accuracy, and waterproofing material selection, thereby improving the joint's inherent sealing performance. It also provides a basis for improving construction techniques. For example, during pipe joint installation, the jointing process can be adjusted based on test results to reduce the possibility of misalignment and improve construction quality and efficiency.

[0025] 3) The terminal control system connects to the lifting assembly, water pressure monitoring unit, and pressurization assembly, enabling intelligent control of the closed water test process. By presetting test parameters, the system automatically completes operations such as water injection, pressurization, and water pressure monitoring, reducing manual intervention and improving test accuracy and repeatability. Furthermore, the terminal control system automatically records and analyzes test data, generating detailed test reports that provide a scientific basis for project acceptance and subsequent maintenance.

[0026] 4) This invention provides a standardized sealing performance testing method and technical specifications for rectangular pipe jacking projects. Its widespread application within the industry will help unify testing standards and acceptance requirements for pipe jacking projects, promoting the standardization and development of pipe jacking technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0028] Figure 1 This is a front view of the water-tightness test device for rectangular pipe jacking under misaligned conditions according to the present invention;

[0029] Figure 2 It is a left side view of the water-tightness test device for rectangular pipe jacking under misalignment conditions of the present invention;

[0030] Figure 3 This is a right side view of the water-tightness test device for rectangular pipe jacking under misalignment conditions according to the present invention;

[0031] Figure 4 This is a schematic diagram of the matching relationship between the first waterproof steel plate and the second waterproof steel plate.

[0032] Among them, 1. Pipe joint; 2. Water injection cavity; 3. First waterproof steel plate; 4. Second waterproof steel plate; 5. Cover plate; 6. Through bolt; 7. Adjustment bolt; 8. Mounting buckle plate; 9. Pressure plate; 10. Fixed seat; 11. Hydraulic lifting seat; 12. Water pressure gauge; 13. OMEGA rubber waterstop. DETAILED DESCRIPTION

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0034] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0035] Reference Figure 1-4 The present invention provides a water-tightness test device for rectangular pipe jacking under misalignment conditions, comprising:

[0036] Pipe segment 1, there are two groups of pipe segments 1, and the two groups of pipe segments 1 are horizontally butted against each other;

[0037] The closing mechanism includes two sets of symmetrically arranged waterproof frames, which are respectively fixed on the two sets of pipe segments 1. A waterstop is provided between the two sets of waterproof frames. The waterstop is fixed to the outer surface of the waterproof frame through an anchoring assembly. An annular water injection cavity 2 is formed between the two sets of waterproof frames and the waterstop.

[0038] The loading mechanism includes a fixed component and a lifting component. The fixed component is installed at the bottom of one group of pipe segments 1, and the lifting component is installed at the bottom of the other group of pipe segments 1.

[0039] A water pressure monitoring unit is installed on one of the waterproof frames and is used to monitor the water pressure in the water injection chamber 2;

[0040] A pressurizing component, the pressurizing component is connected to the water injection chamber 2;

[0041] The terminal control system, the lifting component, the water pressure monitoring unit, and the pressurizing component are all connected to the terminal control system.

[0042] When the present invention is in operation, two groups of pipe sections 1 are placed horizontally in a butt joint to form a rectangular pipe-jacking structure.

[0043] Two symmetrical waterproof frames are fixed to the two pipe segments 1, ensuring secure installation and accurate positioning. Anchoring components are then used to secure the waterstop strips to the outer sides of the waterproof frames. Together, the two waterproof frames and the waterstop strips form a circular water injection chamber 2, effectively sealing the joints at the pipe segments 1 and creating a closed space for subsequent water-tightness testing. A fixing component is installed at the bottom of one of the pipe segments 1, providing stable support and securing the segment 1 in place during the test, preventing displacement due to external forces. A lifting component is installed at the bottom of the other pipe segment 1. The terminal control system allows precise control of the lifting component, enabling fine vertical adjustment of the segment 1. This feature is particularly important when managing misaligned rectangular pipe jacking. Adjusting the lifting component simulates varying misalignment heights. A pressurizing component is connected to the water injection chamber 2 and activated to inject water into it. As water is injected, the pressure within the chamber 2 gradually increases. A water pressure monitoring unit, installed at one of the waterproof frames, monitors the water pressure changes within the chamber 2 in real time and transmits the data to the terminal control system. The terminal control system precisely regulates the pressurization assembly based on the preset test pressure value, ensuring that the water pressure in water injection chamber 2 remains stable within the test range. Throughout the water-tightness test, the terminal control system continuously receives water pressure data from the water pressure monitoring unit while monitoring the operating status of the lifting assembly. This data provides operators with real-time information on the progress of the water-tightness test and determines whether the sealing performance of water injection chamber 2 meets the requirements. If any abnormal water pressure fluctuations or signs of leakage are detected, the operator can promptly adjust the operating parameters of the pressurization assembly or conduct further inspection and repair of the device based on the feedback from the terminal control system to ensure the smooth progress of the test.

[0044] Further optimization scheme, the waterproof frame includes four groups of frame surfaces, the frame surfaces include a first waterproof steel plate 3, a second waterproof steel plate 4, a cover plate 5 and a through bolt 6, the second waterproof steel plate 4 is arranged between the first waterproof steel plate 3 and the cover plate 5, and the through bolt 6 passes through the cover plate 5 and the first waterproof steel plate 3 and is threadedly connected to the fixing nut.

[0045] The waterproof frame consists of four panels, each comprising a first waterproof steel plate 3, a second waterproof steel plate 4, a cover plate 5, and through-bolts 6. During assembly, the second waterproof steel plate 4 is placed between the first waterproof steel plate 3 and the cover plate 5. Through-bolts 6 are threaded through the cover plate 5, the second waterproof steel plate 4, and the first waterproof steel plate 3, respectively, before being threaded together with retaining nuts. The tightening force of the bolts and nuts secures the three together, forming a frame with excellent sealing and structural strength. The four panels are joined together to form a rectangular frame structure, which is fixed to the pipe segment 1, providing a foundation for the subsequent installation of the waterstop and the formation of the water injection cavity 2.

[0046] Through the fastening connection of the through bolts 6 and the fixing nuts, the various parts of the frame surface are tightly combined, thereby improving the overall structural strength of the waterproof frame, being able to withstand the water pressure in the water injection chamber 2 and possible external forces, and ensuring that the frame does not deform or loosen during the closed water test.

[0047] The frame surfaces are tightly spliced together, and combined with the subsequently installed waterstop, they effectively prevent water leakage, provide a reliable closed environment for the water-tightness test, and ensure the accuracy of the test results.

[0048] The modular frame design facilitates installation and disassembly on the pipe segment 1. When part of the frame surface is damaged, it can be replaced individually, reducing maintenance costs and difficulty.

[0049] A further optimized solution is that the anchoring assembly includes an adjusting bolt 7, an installing clip plate 8 and a pressure plate 9. The installing clip plate 8 is fixed on the pressure plate 9. The adjusting bolt 7 passes through the pressure plate 9 and is vertically threaded on the outer wall of the cover plate 5. The adjusting bolt 7 and the pressure plate 9 are rotationally connected. The water stop is arranged between the clip plate and the cover plate 5, and the clip plate abuts against the water stop.

[0050] The mounting gusset plate 8 is fixed to the pressure plate 9, and the adjusting bolt 7 passes through the pressure plate 9 and is vertically threaded and connected to the outer wall of the cover plate 5. The adjusting bolt 7 is rotatably connected to the pressure plate 9. When installing the waterstop, it is placed between the mounting gusset plate 8 and the cover plate 5. By rotating the adjusting bolt 7, since the adjusting bolt 7 is threadedly connected to the cover plate 5 and rotatably connected to the pressure plate 9, the adjusting bolt 7 will push the pressure plate 9 and the mounting gusset plate 8 toward the cover plate 5, so that the mounting gusset plate 8 and the cover plate 5 tightly clamp the waterstop, thereby fixing the waterstop.

[0051] By adjusting the mechanical clamping effect of the bolt 7, a stable and reliable fixing force can be provided for the waterstop, ensuring that the waterstop will not be displaced or fall off under the action of water pressure in the water injection chamber 2, thereby ensuring the sealing performance of the waterstop.

[0052] The clamping force of the waterstop can be accurately adjusted according to the thickness and material of the waterstop by rotating the adjusting bolt 7, which can adapt to the installation of waterstops of different specifications and requirements, thereby improving the versatility and adaptability of the device.

[0053] When the waterstop needs to be replaced, you only need to rotate the adjusting bolt 7 in the opposite direction, loosen the clamping of the installation buckle plate 8 and the cover plate 5 on the waterstop, and then you can easily remove the old waterstop and install a new one. The operation is simple and improves construction efficiency.

[0054] According to a further optimized solution, the first waterproof steel plate 3 is fixed to the outer wall of the pipe segment 1 by fixing screws.

[0055] In a further optimized solution, the fixing assembly includes a fixing seat 10 , which is fixed to the bottom of one group of pipe segments 1 .

[0056] The fixing base 10 is fixed to the bottom of one of the pipe segments 1 by welding, bolting, etc. The fixing base 10 has a large contact area and a stable structure, which can provide reliable support for the pipe segment 1 and prevent the pipe segment 1 from moving or shaking horizontally during the closed water test.

[0057] Such an arrangement can ensure that the pipe segment 1 is fixed in position during the test, avoid damage to the seal of the water injection chamber 2 or inaccurate test data due to movement of the pipe segment 1, and ensure the reliability and accuracy of the closed water test.

[0058] The fixing seat 10 can be customized according to the size and shape of the pipe segment 1, and can adapt to the requirements of the water-tightness test of rectangular jacking pipes of different specifications, thereby improving the versatility of the device.

[0059] The fixing base 10 has a simple structure and is easy to manufacture and install, thus reducing the complexity and cost of the device.

[0060] According to a further optimized solution, the lifting assembly includes a hydraulic lifting seat 11 , which is fixed to the bottom of another group of pipe segments 1 .

[0061] The hydraulic lift base 11 is equipped with components such as a hydraulic cylinder and piston, powered by a hydraulic system. When a hydraulic pump presses hydraulic oil into the hydraulic cylinder, the piston moves up and down under the influence of the hydraulic oil, thereby vertically raising and lowering the pipe segment 1 fixed to the hydraulic lift base 11. The terminal control system precisely adjusts the lifting height and speed of the hydraulic lift base 11 by controlling the pressure and flow of the hydraulic system, thereby fine-tuning the docking height of the pipe segment 1.

[0062] Such a setting can accurately control the lifting height of the pipe segment 1, effectively deal with the problem of rectangular jacking pipe misalignment, enable the two groups of pipe segments 1 to simulate the working conditions of different misalignment heights of the pipe segments, and improve the applicability of the device.

[0063] The hydraulic drive mode has the advantages of fast response speed and high control accuracy. The operator can quickly and conveniently adjust the height of the pipe section 1 through the terminal control system according to actual conditions, thereby improving construction efficiency.

[0064] The hydraulic lifting seat 11 can bear a large weight, meet the lifting requirements of pipe sections 1 of different specifications, and ensure the stability and safety of the pipe section 1 during the lifting process.

[0065] According to a further optimized solution, the water pressure monitoring unit includes a water pressure gauge 12 , which is installed on one of the sets of second waterproof steel plates 4 .

[0066] A water pressure gauge 12 is mounted on one of the second waterproof steel plates 4. It senses changes in water pressure within the water injection chamber 2 through a pipe connected to the water injection chamber 2 or through direct contact with the water within the chamber 2. A sensor within the water pressure gauge 12 converts the water pressure signal into an electrical signal and transmits it to a terminal control system, which processes and displays the signal, thereby enabling real-time monitoring of the water pressure within the chamber 2.

[0067] Such a setting can obtain the water pressure data in the water injection chamber 2 in a timely and accurate manner, provide intuitive water pressure information to the operator, enable the operator to understand the progress of the water sealing test at any time, and judge whether the sealing performance of the water injection chamber 2 meets the requirements.

[0068] When the water pressure fluctuates abnormally or exceeds the preset safety value, the terminal control system can issue an alarm in time to remind the operator to take appropriate measures to avoid damage to the equipment or safety accidents caused by excessive water pressure, thereby ensuring the safety of the test process.

[0069] The terminal control system can record and store water pressure data, facilitating subsequent analysis and processing of the test data, and providing a basis for optimizing the closed water test device and improving the construction process.

[0070] To further optimize the solution, the pressurizing component includes a pressurizing pump, a high-pressure pipe is installed at the output end of the pressurizing pump, a valve is installed on the high-pressure pipe, and one end of the high-pressure pipe passes through one of the second waterproof steel plates 4 and extends into the water injection chamber 2.

[0071] The booster pump acts as a power source, pumping water from the water source and pressurizing it before transferring it to the water injection chamber 2 through the high-pressure pipe. A valve installed on the high-pressure pipe controls the flow and on-off of the water. When pressurized water is injected into the water injection chamber 2, the valve is opened, the booster pump operates, and water enters the water injection chamber 2 through the high-pressure pipe. Stopping water injection or adjusting the injection speed can be achieved by adjusting the valve opening.

[0072] The pressure pump can provide a stable water pressure output, ensuring that the water pressure in the water injection chamber 2 can gradually increase according to the test requirements and remain within the set range, meeting the sealing performance detection requirements of the closed water test under different water pressure conditions.

[0073] The water on / off and flow rate can be easily controlled through the valve. The operator can flexibly adjust the water injection speed and pressure according to the test progress, thereby improving the operability and flexibility of the test.

[0074] Appropriate pressure pumps and high-pressure pipes can be selected according to different test requirements, and can adapt to rectangular pipe jacking water-tightness tests of different scales and requirements.

[0075] To further optimize the solution, the waterstop is OMEGA rubber waterstop 13.

[0076] The OMEGA rubber waterstop 13 features a unique Ω shape and excellent elasticity. When secured between two waterproof frames to form a water injection chamber 2, the water pressure within the chamber causes it to elastically deform, tightly fitting onto the contact surfaces of the waterproof frames, filling any small gaps and preventing water leakage. Furthermore, the rubber material offers excellent sealing and water resistance, effectively resisting water erosion and pressure fluctuations.

[0077] To further optimize the solution, an F-type socket joint is provided between the two groups of pipe sections 1, and the two pipe sections 1 are butt-jointed via the F-type socket joint.

[0078] The F-shaped socket joint has a specific shape and structure. When two pipe segments 1 are connected, the end of one segment 1 is inserted into the F-shaped socket at the end of the other segment 1. The shape of the socket design provides a certain degree of guidance, allowing the pipe segments 1 to connect smoothly. At the same time, the sealing structure within the socket (such as the rubber sealing ring) is squeezed and elastically deformed after the pipe segments 1 are connected, filling the gap between the pipe segments 1 and achieving a preliminary connection and sealing. During the closed water test, the water pressure within the water injection chamber 2 exerts pressure on the joint of the pipe segments 1, further verifying the sealing performance of the joint.

[0079] In the description of the present invention, it should be understood that 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, and are only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0080] The embodiments described above are merely descriptions of preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Without departing from the spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by persons skilled in the art should fall within the scope of protection defined by the claims of the present invention.

Claims

1. A water-tightness test device for rectangular pipe jacking under misalignment conditions, characterized in that: include: Pipe segments (1), wherein the pipe segments (1) are provided in two groups, and the two groups of pipe segments (1) are horizontally butted against each other; A closing mechanism, the closing mechanism comprising two groups of symmetrically arranged waterproof frames, the two groups of waterproof frames being fixed on the two groups of pipe sections (1) respectively, a waterstop being provided between the two groups of waterproof frames, the waterstop being fixed on the outer surface of the waterproof frame via an anchoring assembly, and an annular water injection cavity (2) being formed between the two groups of waterproof frames and the waterstop; A loading mechanism, the loading mechanism comprising a fixing assembly and a lifting assembly, the fixing assembly being mounted on the bottom of one group of the pipe sections (1), and the lifting assembly being mounted on the bottom of another group of the pipe sections (1); a water pressure monitoring unit, the water pressure monitoring unit being mounted on one of the waterproof frames and being used to monitor the water pressure in the water injection chamber (2); a pressurizing assembly, the pressurizing assembly being in communication with the water injection chamber (2); The terminal control system, the lifting component, the water pressure monitoring unit, and the pressurizing component are all connected to the terminal control system.

2. The closed water test device for rectangular pipe jacking under misalignment conditions according to claim 1, characterized in that: The waterproof frame includes four groups of frame surfaces, each of which includes a first waterproof steel plate (3), a second waterproof steel plate (4), a cover plate (5) and a through bolt (6). The second waterproof steel plate (4) is arranged between the first waterproof steel plate (3) and the cover plate (5). The through bolt (6) passes through the cover plate (5) and the first waterproof steel plate (3) and is threadedly connected to a fixing nut.

3. The closed water test device for rectangular pipe jacking under misalignment conditions according to claim 2, characterized in that: The anchoring assembly includes an adjusting bolt (7), a mounting clip (8) and a pressure plate (9); the mounting clip (8) is fixed on the pressure plate (9); the adjusting bolt (7) passes through the pressure plate (9) and is vertically threadedly connected to the outer wall of the cover plate (5); the adjusting bolt (7) and the pressure plate (9) are rotationally connected; the water stop is arranged between the clip plate and the cover plate (5), and the clip plate abuts against the water stop.

4. The closed water test device for rectangular pipe jacking under misalignment conditions according to claim 2, characterized in that: The first waterproof steel plate (3) is fixed to the outer wall of the pipe section (1) by means of fixing screws.

5. The closed water test device for rectangular pipe jacking under misalignment conditions according to claim 1 is characterized in that: The fixing assembly comprises a fixing seat (10), and the fixing seat (10) is fixed to the bottom of one group of the pipe sections (1).

6. The water-tightness test device for rectangular pipe jacking under misalignment conditions according to claim 1 is characterized in that: The lifting assembly comprises a hydraulic lifting seat (11), and the hydraulic lifting seat (11) is fixed on the bottom of another group of pipe sections (1).

7. The water-tightness test device for rectangular pipe jacking under misalignment conditions according to claim 2 is characterized in that: The water pressure monitoring unit comprises a water pressure gauge (12), and the water pressure gauge (12) is installed on one group of the second waterproof steel plates (4).

8. The water-tightness test device for rectangular pipe jacking under misalignment conditions according to claim 2 is characterized in that: The pressurizing component includes a pressurizing pump, the output end of which is provided with a high-pressure pipe, the high-pressure pipe being provided with a valve, one end of which passes through one of the second waterproof steel plates (4) and extends into the water injection cavity (2).

9. The closed water test device for rectangular pipe jacking under misalignment conditions according to claim 1, characterized in that: The water stop is an OMEGA rubber water stop (13).

10. The water-tightness test device for rectangular pipe jacking under misalignment conditions according to claim 1 is characterized in that: An F-type socket joint is provided between the two groups of pipe sections (1), and the two pipe sections (1) are butt-jointed via the F-type socket joint.

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