Leakage detection and treatment method for joint position of underground diaphragm wall

Abstract

The invention relates to the technical field of underground diaphragm walls, and discloses an underground diaphragm wall joint position leakage detection and treatment method, which comprises the following steps of: 1) forming a joint position between a plurality of wall sections which are butted in sequence, and pre-burying a sleeve valve pipe at the joint position; (2) connecting the connector of the sleeve valve pipe with a water injection pump, detecting the pressure change of water in the sleeve valve pipe, and determining that the joint position with leakage is the leakage position; (3) a connector of the sleeve valve pipe inserted into the leakage position is connected with a grouting pump, the grouting pump injects high-pressure grout into the sleeve valve pipe, a leakage gap in the leakage position is filled, and the sleeve valve pipe and the wall section are solidified to form a closed integrated structure; the sleeve valve pipe is pre-buried at the joint position of the underground diaphragm wall, and the water body with the set pressure is injected by the water injection pump to detect the pressure change, so that the leakage position can be efficiently and accurately determined.

Description

Technical Field

[0001] The patent of this invention relates to the technical field of underground continuous walls, specifically, to a method for detecting and controlling leakage at the joints of underground continuous walls. Background Art

[0002] As an efficient deep foundation pit support structure, underground continuous wall has been widely used in urban underground space development.

[0003] However, due to the influence of factors such as construction technology, geological conditions and construction quality control, there are often hidden dangers of leakage at the joints of underground continuous walls, which will not only reduce the waterproof performance of the underground continuous wall, but may also cause serious accidents such as foundation pit seepage, pipe bursts and even instability of the retaining structure, posing a threat to foundation pit construction safety and the surrounding environment.

[0004] In the existing technology, most detection methods need to be carried out after the construction is completed. The detection process is complicated and time-consuming. For example, the drilling and coring method requires point-by-point detection, which makes it difficult to quickly locate the leakage point. Its detection accuracy and efficiency cannot meet the actual engineering needs. Some detection methods need to be carried out simultaneously with construction processes such as foundation pit dewatering, but multiple sampling and testing are required during the dewatering process, and the detection efficiency is low. Summary of the Invention

[0005] The purpose of the present invention is to provide a method for detecting and treating leakage at the joints of underground continuous walls, aiming to solve the problem of low efficiency of leakage detection at the joints in the prior art.

[0006] The present invention is achieved by: a method for detecting and treating leakage at the joint of an underground continuous wall, comprising the following steps:

[0007] 1) The underground continuous wall comprises multiple wall segments connected in sequence, with joints formed between adjacent wall segments. The underground continuous wall has multiple joints. During the process of pouring concrete to form the wall segments, sleeve valve pipes are pre-embedded at the joints. The top of the sleeve valve pipe has a connector, which is exposed on the wall segment.

[0008] 2) Connecting the connector of the sleeve valve tube to a water injection pump, injecting water of a set pressure into the sleeve valve tube by the water injection pump, detecting the pressure change of the water in the sleeve valve tube, and determining the joint position where the leakage occurs as the leakage position when the pressure change of the water exceeds the set variation range, and the leakage position has a spreading leakage gap;

[0009] 3) Connect the connector of the sleeve valve tube inserted in the leakage position to a grouting pump, and the grouting pump injects high-pressure slurry into the sleeve valve tube. The high-pressure slurry is ejected outward from the sleeve valve tube to fill the leakage gap in the leakage position and consolidate with the wall section to form a closed integrated structure.

[0010] Furthermore, in step 1), the sleeve valve tube is arranged longitudinally and perpendicular to the wall section, and the connecting head is exposed at the top of the wall section.

[0011] Furthermore, in step 1), a steel cage is provided in the wall section, and the end of the steel cage has an end section extending to the joint position, and the sleeve valve tube is inserted into the end section.

[0012] Furthermore, in step 1), the steel cage is lowered into the construction position, and the sleeve valve tube is inserted into the end section and fixedly connected to the end section, and then concrete is poured into the construction position. The concrete wraps the steel cage, and after the concrete solidifies, it is formed into the wall section.

[0013] Furthermore, in step 1), the end section has a horizontally bent bending position, the sleeve valve tube is embedded in the bending position, and is fixedly connected to the bending position and connected to the steel cage as a whole.

[0014] Furthermore, in step 1), during the process of pouring concrete to form wall segments, an I-beam is provided between adjacent wall segments; the middle portion of the I-beam is placed in the joint position, the side portion of the I-beam has an enclosing area, and the end segment is embedded in the enclosing area.

[0015] Furthermore, in step 1, in step 1), the I-beam includes a middle plate, and end plates are respectively provided at both ends of the middle plate, and the two end plates and the middle plate are enclosed to form the enclosed area; the middle plate is placed in the joint position, and the end plates are embedded in the wall section.

[0016] Furthermore, in step 1), the steel cage includes a plurality of horizontally arranged transverse ribs and a plurality of longitudinally arranged longitudinal ribs, wherein the plurality of transverse ribs are arranged at intervals along the longitudinal direction and are arranged in a circumferential shape, and the plurality of longitudinal ribs are arranged at intervals along the circumference of the transverse ribs and are respectively fixedly connected to the transverse ribs;

[0017] The end portion of the transverse rib is arranged in a bent shape to form the bent position, and the sleeve valve tube is placed in the bent position and fixedly connected to the transverse rib.

[0018] Furthermore, the sleeve valve pipe includes a valve pipe, the valve pipe has an outer grouting section, the outer grouting section is provided with a one-way valve for outward one-way grouting; a grouting core pipe is provided in the valve pipe, the grouting core pipe has an inner grouting section, and the inner grouting section is aligned with the outer grouting section;

[0019] The inner grouting section is provided with a grouting port, a grouting space is formed between the inner grouting section and the outer grouting section, and a plurality of sealing rings are provided on the grouting core tube, and the plurality of sealing rings are respectively located at the ends of the grouting space to seal the ends of the grouting space;

[0020] In the step 2), the water in the sleeve valve tube enters the grouting space through the grouting port, and the water in the grouting space applies unidirectional pressure to the joint position through the one-way valve;

[0021] In the step 3), during the grouting process of the sleeve valve tube, the high-pressure slurry in the grouting core tube enters the grouting space through the grouting port, the high-pressure slurry in the grouting space is ejected outward in one direction through the one-way valve, and the high-pressure slurry penetrates into the leakage gap in the leakage position and consolidates with the wall section to form a closed integrated structure.

[0022] Furthermore, the outer periphery of the outer grouting section is concave inward to form a concave area with an outer opening, and the one-way valve is arranged in the concave area; the outer opening of the concave area is covered with a metal mesh layer, and the metal mesh layer is provided with a plurality of outer mesh holes, and the outer periphery of the metal mesh layer is fixed to the outer periphery of the concave area;

[0023] The outer periphery of the outer grouting section is wrapped with a filter layer, and the filter layer covers the metal mesh layer; an elastic membrane layer is provided in the recessed area, the outer periphery of the elastic membrane layer is fixed to the outer periphery of the recessed area, the elastic membrane layer and the metal mesh layer are arranged at intervals, and the elastic membrane layer is provided with a plurality of inner mesh holes;

[0024] In step 1), during the process of pouring concrete to form the wall segment, the concrete is blocked by the filter layer and isolated outside the recessed area; in step 2), the water passes through the inner mesh and the outer mesh respectively, breaks through the filter layer, and applies unidirectional pressure to the joint position;

[0025] In step 3), the high-pressure slurry in the grouting space enters the recessed area through the one-way valve, passes through the inner mesh and the outer mesh respectively, and after being dispersed, the high-pressure slurry breaks through the filter layer and penetrates into the leakage gap at the penetration position in multiple directions;

[0026] During the process of the high-pressure slurry being sprayed and penetrated outward in multiple directions, the elastic membrane layer expands and contracts back and forth, applying secondary grouting pressure to the high-pressure slurry.

[0027] Compared with the existing technology, the method for detecting and treating leakage at the joints of underground continuous walls provided by the present invention can efficiently and accurately determine the leakage location by pre-embedding sleeve valve pipes at the joints of underground continuous walls and injecting water at a set pressure using a water injection pump to detect pressure changes. Specifically, it has the following technical effects:

[0028] 1) By pre-embedding the sleeve valve pipe during the pouring of the concrete wall section, the tedious process of additional inspection steps after the construction is completed is avoided, greatly shortening the inspection time. At the same time, by real-time monitoring of the water pressure changes in the sleeve valve pipe, the leakage point can be quickly located, thereby achieving efficient joint position leakage detection.

[0029] 2) By accurately monitoring the changes in water pressure in the sleeve valve tube, tiny leakage points can be detected. At the same time, the leakage location can be directly determined, avoiding the problem of missed detection due to limited detection range. This is crucial for the long-term stability and waterproof performance of the underground continuous wall.

[0030] 3) High-pressure slurry is injected into the sleeve valve pipe through a grouting pump to fill the leakage gap and form a closed integrated structure, achieving efficient and thorough leakage control. This not only effectively repairs the leakage channel, but also ensures the waterproof performance and structural stability of the underground continuous wall. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic flow chart of the method for detecting and treating leakage at the joint of underground continuous wall provided by the present invention;

[0032] Figure 2 It is a top cross-sectional schematic diagram of the steel cage and sleeve valve tube provided by the present invention;

[0033] Figure 3 This is a schematic diagram of the main view of the I-beam provided by the present invention;

[0034] Figure 4 is a schematic cross-sectional view of the sleeve valve tube structure provided by the present invention;

[0035] Figure 5 It is a cross-sectional schematic diagram of the external grouting section structure provided by the present invention;

[0036] In the figure: joint position 100, reinforcement cage 101, end section 102, bend position 103, transverse reinforcement 104, longitudinal reinforcement 105, I-beam 106, surrounding area 107, middle plate 108, end plate 109;

[0037] Sleeve valve tube 200, one-way valve 201, grouting core tube 202, inner grouting section 203, grouting port 204, grouting space 205, sealing ring 206;

[0038] Valve tube 300 , outer grouting section 301 , recessed area 302 , metal mesh layer 303 , filter layer 304 , elastic membrane layer 305 . DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0040] The implementation of the present invention is described in detail below with reference to specific embodiments.

[0041] The same or similar numbers in the drawings of this embodiment correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", etc. indicate the orientation or position relationship, they are based on the orientation or position relationship shown in the drawings. This is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0042] Reference Figure 1-5 The figure shows a preferred embodiment of the present invention.

[0043] The method for detecting and treating leakage at the joint of underground continuous wall comprises the following steps:

[0044] 1) The underground continuous wall includes multiple wall segments connected in sequence, with joints 100 formed between adjacent wall segments. The underground continuous wall has multiple joints 100. During the process of pouring concrete to form the wall segments, sleeve valve pipes 200 are pre-embedded at the joints 100. The top of the sleeve valve pipe 200 has a connector, which is exposed on the wall segment.

[0045] 2) Connect the connector of the sleeve valve tube 200 to a water injection pump. The water injection pump injects water of a set pressure into the sleeve valve tube 200 and detects the pressure change of the water in the sleeve valve tube 200. When the pressure change of the water exceeds the set change range, the joint position 100 where the leakage occurs is determined to be the leakage position, and there is a spreading leakage gap in the leakage position;

[0046] 3) Connect the connector of the sleeve valve tube 200 inserted in the leakage position to the grouting pump, and the grouting pump injects high-pressure slurry into the sleeve valve tube 200. The high-pressure slurry is ejected outward from the sleeve valve tube 200 to fill the leakage gap in the leakage position and consolidate with the wall section to form a closed integrated structure.

[0047] The above-mentioned method for detecting and treating leakage at underground continuous wall joints can efficiently and accurately determine the leakage location by pre-embedding a sleeve valve pipe 200 at the underground continuous wall joint 100 and injecting water at a set pressure using a water injection pump to detect pressure changes. Specifically, it has the following technical effects:

[0048] 1) By pre-embedding the sleeve valve tube 200 during the pouring of the concrete wall section, the tedious process of performing additional inspection steps after the construction is completed is avoided, which greatly shortens the inspection time. At the same time, by real-time monitoring of the water pressure changes in the sleeve valve tube 200, the leakage point can be quickly located, thereby achieving efficient joint position 100 leakage detection.

[0049] 2) By accurately monitoring the changes in water pressure in the sleeve valve tube 200, tiny leakage points can be detected. At the same time, the leakage location can be directly determined, avoiding the problem of missed detection due to limited detection range. This is crucial for the long-term stability and waterproof performance of the underground continuous wall.

[0050] 3) High-pressure slurry is injected into the sleeve valve pipe 200 through a grouting pump to fill the leakage gap and form a closed integrated structure, thereby achieving efficient and thorough leakage control. This can not only effectively repair the leakage channel, but also ensure the waterproof performance and structural stability of the underground continuous wall.

[0051] In this embodiment, in step 1), the sleeve valve tube 200 is arranged longitudinally and perpendicular to the wall section, and the connecting head is exposed at the top of the wall section.

[0052] Through such an arrangement, the sleeve valve tube 200 can be directly connected to the water injection pump and the grouting pump, which is easy to operate. The longitudinal arrangement can ensure that the sleeve valve tube 200 has a wider coverage at the joint position 100, which is convenient for subsequent leakage detection and control operations, and improves construction efficiency and reliability.

[0053] In this embodiment, in step 1), a steel cage 101 is provided in the wall section, and the end of the steel cage 101 has an end section 102 extending to the joint position 100 , and the sleeve valve tube 200 is inserted into the end section 102 .

[0054] By inserting the sleeve valve tube 200 into the end section 102 of the steel cage 101, the sleeve valve tube 200 can be ensured to maintain a stable position during the concrete pouring process, avoiding displacement or damage, thereby improving construction quality and ensuring the accuracy of subsequent leakage detection.

[0055] In this embodiment, in step 1), the steel cage 101 is lowered into the construction position, and then the sleeve valve tube 200 is inserted into the end section 102 and fixedly connected to the end section 102, and then concrete is poured into the construction position. The concrete wraps the steel cage 101, and after the concrete solidifies, it is formed into a wall section.

[0056] This construction process can ensure that the sleeve valve tube 200 is tightly combined with the steel cage 101. At the same time, during the concrete pouring process, the position of the sleeve valve tube 200 is fixed, avoiding possible displacement problems during the construction process, thereby improving the stability and reliability of the construction.

[0057] In this embodiment, in step 1), the end section 102 has a horizontally bent bending position 103, and the sleeve valve tube 200 is embedded in the bending position 103 and fixedly connected to the bending position 103 and connected to the steel cage 101 as a whole.

[0058] By embedding the sleeve valve tube 200 into the bending position 103 of the end section 102 of the steel cage 101 and fixing the connection, the bonding strength between the sleeve valve tube 200 and the steel cage 101 can be further enhanced, ensuring that the sleeve valve tube 200 will not loosen or shift during concrete pouring and subsequent use, thereby improving the reliability of leakage detection and control.

[0059] In this embodiment, in step 1), during the process of pouring concrete to form wall segments, an I-beam 106 is provided between adjacent wall segments; the middle portion of the I-beam 106 is placed in the joint position 100, and the side of the I-beam 106 has an enclosing area 107, in which the end segment 102 is embedded.

[0060] By setting the I-beam 106, the structural strength of the joint position 100 can be enhanced, and at the same time, stable support can be provided for the end section 102 of the steel cage 101, ensuring the stability of the sleeve valve pipe 200 at the joint position 100, thereby improving the structural performance and waterproof performance of the entire underground continuous wall.

[0061] In this embodiment, in step 1, in step 1), the I-beam 106 includes a middle plate 108, and end plates 109 are respectively provided at both ends of the middle plate 108. The two end plates 109 and the middle plate 108 enclose a surrounding area 107; the middle plate 108 is placed in the joint position 100, and the end plates 109 are embedded in the wall segment.

[0062] In this way, the I-beam 106 can better adapt to the construction requirements of the joint position 100, while providing stable support for the end section 102 of the steel cage 101 and the sleeve valve tube 200, ensuring stability and reliability during the construction process.

[0063] In this embodiment, in step 1), the steel cage 101 includes a plurality of horizontally arranged transverse ribs 104 and a plurality of longitudinally arranged longitudinal ribs 105. The plurality of transverse ribs 104 are arranged at intervals along the longitudinal direction and are arranged in a circumferential shape. The plurality of longitudinal ribs 105 are arranged at intervals along the circumference of the transverse ribs 104 and are respectively fixedly connected to the transverse ribs 104.

[0064] The end of the transverse rib 104 is arranged in a bent shape to form a bent position 103 . The sleeve valve tube 200 is placed in the bent position 103 and is fixedly connected to the transverse rib 104 .

[0065] The structural design of the steel cage 101 can improve the overall strength and stability of the steel cage 101, while providing a stable fixed position for the sleeve valve tube 200, ensuring that the sleeve valve tube 200 remains stable during the concrete pouring process, thereby improving construction quality.

[0066] In this embodiment, the sleeve valve pipe 200 includes a valve pipe 300, which has an outer grouting section 301. The outer grouting section 301 is provided with a one-way valve 201 for outward one-way grouting; a grouting core pipe 202 is provided in the valve pipe 300, and the grouting core pipe 202 has an inner grouting section 203. The inner grouting section 203 is aligned with the outer grouting section 301.

[0067] The inner grouting section 203 is provided with a grouting port 204, and a grouting space 205 is formed between the inner grouting section 203 and the outer grouting section 301. The grouting core tube 202 is provided with a plurality of sealing rings 206, which are respectively located at the ends of the grouting space 205 to seal the ends of the grouting space 205.

[0068] In step 2), the water in the sleeve valve tube 200 enters the grouting space 205 through the grouting port 204, and the water in the grouting space 205 passes through the one-way valve 201 to apply unidirectional pressure to the joint position 100;

[0069] In step 3), during the grouting process of the sleeve valve tube 200, the high-pressure slurry in the grouting core tube 202 enters the grouting space 205 through the grouting port 204, and the high-pressure slurry in the grouting space 205 is ejected outward in one direction through the one-way valve 201. The high-pressure slurry penetrates into the leakage gap in the leakage position and consolidates with the wall section to form a closed integrated structure.

[0070] The structural design of the sleeve valve tube 200 can ensure one-way spraying of the slurry and avoid slurry backflow. At the same time, high-pressure grouting can effectively fill the leakage gaps to form a closed structure, thereby improving the effect of leakage control and achieving efficient detection of leakage at the joint position 100.

[0071] In this embodiment, the outer periphery of the outer grouting section 301 is recessed inward to form a recessed area 302 with an outer opening. The one-way valve 201 is disposed in the recessed area 302. The outer opening of the recessed area 302 is covered with a metal mesh layer 303. The metal mesh layer 303 has a plurality of outer mesh holes. The outer periphery of the metal mesh layer 303 is fixed to the outer periphery of the recessed area 302.

[0072] The outer periphery of the outer grouting section 301 is wrapped with a filter layer 304, which covers the metal mesh layer 303. An elastic membrane layer 305 is provided in the recessed area 302. The outer periphery of the elastic membrane layer 305 is fixed to the outer periphery of the recessed area 302. The elastic membrane layer 305 is spaced apart from the metal mesh layer 303, and the elastic membrane layer 305 is provided with a plurality of inner mesh holes.

[0073] In step 1), during the pouring of the concrete wall segment, the concrete is blocked by the filter layer 304 and isolated outside the recessed area 302. In step 2), water passes through the inner and outer mesh holes, breaks through the filter layer 304, and applies unidirectional pressure to the joint position 100.

[0074] In step 3), the high-pressure slurry in the grouting space 205 enters the recessed area 302 through the one-way valve 201, passes through the inner mesh and the outer mesh respectively, and after being dispersed, the high-pressure slurry breaks through the filter layer 304 and penetrates into the leakage gap at the penetration position in multiple directions;

[0075] During the process of the high-pressure slurry being sprayed and infiltrated outward in multiple directions, the elastic membrane layer 305 expands and contracts back and forth, exerting secondary grouting pressure on the high-pressure slurry.

[0076] Through the structural setting of the external grouting section 301, the penetration effect of the slurry can be further improved, ensuring that the slurry can evenly fill the leakage gap. At the same time, the secondary grouting pressure of the elastic membrane layer 305 can enhance the filling effect of the slurry, further improving the reliability of leakage control, thereby solving the problem of low leakage detection efficiency at the joint position 100.

[0077] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for detecting and treating leakage at the joint of an underground continuous wall, characterized in that: The following steps are involved: 1) The underground continuous wall comprises multiple wall segments connected in sequence, with joints formed between adjacent wall segments. The underground continuous wall has multiple joints. During the process of pouring concrete to form the wall segments, sleeve valve pipes are pre-embedded at the joints. The top of the sleeve valve pipe has a connector, which is exposed on the wall segment. 2) Connecting the connector of the sleeve valve tube to a water injection pump, injecting water of a set pressure into the sleeve valve tube by the water injection pump, detecting the pressure change of the water in the sleeve valve tube, and determining the joint position where the leakage occurs as the leakage position when the pressure change of the water exceeds the set variation range, and the leakage position has a spreading leakage gap; 3) Connect the connector of the sleeve valve tube inserted in the leakage position to a grouting pump, and the grouting pump injects high-pressure slurry into the sleeve valve tube. The high-pressure slurry is ejected outward from the sleeve valve tube to fill the leakage gap in the leakage position and consolidate with the wall section to form a closed integrated structure.

2. The method for detecting and treating leakage at the joint of underground continuous wall according to claim 1, characterized in that: In the step 1), the sleeve valve tube is arranged longitudinally and perpendicular to the wall section, and the connector is exposed at the top of the wall section.

3. The method for detecting and treating leakage at the joint of underground continuous wall according to claim 1, characterized in that: In step 1), a steel cage is provided in the wall section, and the end of the steel cage has an end section extending to the joint position, and the sleeve valve tube is inserted into the end section.

4. The method for detecting and treating leakage at the joint of underground continuous wall according to claim 3, characterized in that: In the step 1), the steel cage is lowered into the construction position, the sleeve valve tube is inserted into the end section, and after being fixedly connected to the end section, concrete is poured into the construction position. The concrete wraps the steel cage, and after the concrete solidifies, it is formed into the wall section.

5. The method for detecting and treating leakage at the joint of underground continuous wall according to claim 3, characterized in that: In the step 1), the end section has a horizontally bent bending position, the sleeve valve tube is embedded in the bending position, and is fixedly connected to the bending position and connected to the steel cage as a whole.

6. The method for detecting and treating leakage at the joint of underground continuous wall according to claim 3, characterized in that: In step 1), during the process of pouring concrete to form wall segments, an I-beam is provided between adjacent wall segments; the middle portion of the I-beam is placed in the joint position, the side of the I-beam has a surrounding area, and the end segment is embedded in the surrounding area.

7. The method for detecting and treating leakage at the joint of underground continuous wall according to claim 6, characterized in that: In the step 1, in the step 1), the I-beam includes a middle plate, and end plates are respectively provided at both ends of the middle plate, and the two end plates and the middle plate are enclosed to form the enclosed area; the middle plate is placed in the joint position, and the end plates are embedded in the wall section.

8. The method for detecting and treating leakage at the joint of underground continuous wall according to any one of claims 3 to 7, characterized in that: In step 1), the steel cage includes a plurality of horizontally arranged transverse ribs and a plurality of longitudinally arranged longitudinal ribs, wherein the plurality of transverse ribs are arranged at intervals along the longitudinal direction and are arranged in a circumferential shape, and the plurality of longitudinal ribs are arranged at intervals along the circumference of the transverse ribs and are respectively fixedly connected to the transverse ribs; The end portion of the transverse rib is arranged in a bent shape to form the bent position, and the sleeve valve tube is placed in the bent position and fixedly connected to the transverse rib.

9. The method for detecting and treating leakage at the joint of underground continuous wall according to any one of claims 1 to 7, characterized in that: The sleeve valve pipe includes a valve pipe, the valve pipe has an outer grouting section, the outer grouting section is provided with a one-way valve for outward one-way grouting; a grouting core pipe is provided in the valve pipe, the grouting core pipe has an inner grouting section, and the inner grouting section is aligned with the outer grouting section; The inner grouting section is provided with a grouting port, a grouting space is formed between the inner grouting section and the outer grouting section, and a plurality of sealing rings are provided on the grouting core tube, and the plurality of sealing rings are respectively located at the ends of the grouting space to seal the ends of the grouting space; In the step 2), the water in the sleeve valve tube enters the grouting space through the grouting port, and the water in the grouting space applies unidirectional pressure to the joint position through the one-way valve; In the step 3), during the grouting process of the sleeve valve tube, the high-pressure slurry in the grouting core tube enters the grouting space through the grouting port, the high-pressure slurry in the grouting space is ejected outward in one direction through the one-way valve, and the high-pressure slurry penetrates into the leakage gap in the leakage position and consolidates with the wall section to form a closed integrated structure.

10. The method for detecting and treating leakage at the joint of underground continuous wall according to claim 9, characterized in that: The outer periphery of the outer grouting section is concave inward to form a concave area with an outer opening, and the one-way valve is arranged in the concave area; the outer opening of the concave area is covered with a metal mesh layer, and the metal mesh layer is provided with a plurality of outer mesh holes, and the outer periphery of the metal mesh layer is fixed to the outer periphery of the concave area; The outer periphery of the outer grouting section is wrapped with a filter layer, and the filter layer covers the metal mesh layer; an elastic membrane layer is provided in the recessed area, the outer periphery of the elastic membrane layer is fixed to the outer periphery of the recessed area, the elastic membrane layer and the metal mesh layer are arranged at intervals, and the elastic membrane layer is provided with a plurality of inner mesh holes; In step 1), during the process of pouring concrete to form the wall segment, the concrete is blocked by the filter layer and isolated outside the recessed area; in step 2), the water passes through the inner mesh and the outer mesh respectively, breaks through the filter layer, and applies unidirectional pressure to the joint position; In step 3), the high-pressure slurry in the grouting space enters the recessed area through the one-way valve, passes through the inner mesh and the outer mesh respectively, and after being dispersed, the high-pressure slurry breaks through the filter layer and penetrates into the leakage gap at the penetration position in multiple directions; During the process of the high-pressure slurry being sprayed and penetrated outward in multiple directions, the elastic membrane layer expands and contracts back and forth, applying secondary grouting pressure to the high-pressure slurry.

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