A method for treating water leakage of underground continuous wall joint

Abstract

The application provides a treatment method for underground continuous wall crack leakage water, cracks are repaired through a grouting device, wherein the grouting device comprises a stabilizing device and a grouting pipe, the stabilizing device comprises a grouting joint, a rotatable iron sheet group and a counterforce pressing rod, the rotatable iron sheet group can be deformed according to the bending form of cracks, and the grouting requirement of different crack forms can be met, the iron sheet group is arranged to facilitate the plugging of special-shaped cracks, and the counterforce action of the trapezoidal boss ensures sufficient grouting; through the above steps, multiple points can be simultaneously plugged, and the leakage water channel in the underground continuous wall is ensured to be closed.

Description

Technical Field

[0001] This invention belongs to the field of construction technology of diaphragm walls, specifically a method for treating water leakage at joints of diaphragm walls. Background Technology

[0002] Due to their good integrity and high rigidity, diaphragm walls are widely used in deep and large foundation pits. However, due to the construction characteristics of diaphragm walls, the joints between adjacent sections are often their weakest points. When water leakage occurs at these joints, the displacement of the diaphragm wall increases, which in turn affects the deformation of the entire foundation pit, with serious consequences. Therefore, during foundation pit construction, when water leakage occurs at the joints, rapid and effective treatment methods should be adopted to reduce the impact of the leakage. Summary of the Invention

[0003] To address the aforementioned technical problems, this invention provides a method for treating water leakage from cracks in diaphragm walls. The method involves repairing the cracks using a grouting device. This grouting device includes a stabilizing device and a grouting pipe. The stabilizing device comprises a grouting joint, a rotatable iron plate assembly, and a reaction pressure rod. The grouting joint is positioned within a grouting hole at the end of the rotatable iron plate assembly. The reaction pressure rod is threaded onto the grouting joint. The iron plate assembly consists of multiple detachable iron plates, each with an arched protrusion in the center and flat sides. The number of iron plates is determined during installation based on the length of the crack. The component is installed within a trapezoidal groove in the crack, and a reaction pressure bar is positioned outside the groove. Before grouting, the reaction pressure bar is tightened at the grouting crack. During grouting, the impact generates an outward force. The combination of the reaction pressure bar and the trapezoidal groove ensures the overall component is well-stabilized and fixed. Furthermore, the rotatable iron plate assembly can be deformed according to the curvature of the crack. The bottom of the arched protrusion in the middle of the iron plate serves as a grouting cavity, connected to a grouting joint and a grouting pipe. After the grout enters the grouting cavity, it is pressurized and injected into the crack. The grouting pipe is connected to an external grouting pump. The method is characterized by the following steps:

[0004] S1. First, treat the surface of the concrete crack by manually or with a pneumatic hammer to chisel a trapezoidal groove along the crack. Then clean both sides of the crack. The bottom of the trapezoidal groove is the end closest to the crack depth, and the top of the trapezoidal groove is the width away from the crack depth, that is, ensure that the bottom width is greater than the top width.

[0005] S2. Install a stabilizing device along the crack path, wherein rotatable iron plate groups are set according to different bending paths of the crack. After assembly, a grouting joint is installed at its end, and the upper part of the grouting joint is connected to a grouting pipe.

[0006] S3. Seal the cracks with quick-drying cement or cement-water glass grout, and then level them with cement mortar.

[0007] S4. Calculate the amount of grout used. After the grouting material has solidified, grout the cracks. During grouting, the grouting cavity is sealed inside the grouting body, and the inward-curving trapezoidal groove ensures the pressure requirements.

[0008] S5. After grouting is completed, seal the grouting port with quick-setting cement.

[0009] The trapezoidal groove, carved along the crack by hand or pneumatic pick, has a top width of 5 cm, a bottom width of 10 cm, and a depth of 10 cm.

[0010] When the crack is an intersecting crack, the iron sheet assembly includes at least one cross-shaped iron sheet component. The cross-shaped iron sheet component has arched protrusions in all four directions to facilitate the connection of iron sheets in the vertical direction.

[0011] The connection between the grouting joint and the iron sheet can be configured as a two-end connection or a one-end connection, and the distance between the grouting pipes is set to 1~1.5 meters.

[0012] The grouting pipe includes a connecting pipe and a valve. The connecting pipe is a plastic pipe with a diameter of 1 / 2 to 1 / 4 inch and a length of 10 to 15 centimeters. One end of the connecting pipe is inserted into the grouting joint, and the other end is connected to the valve.

[0013] Before sealing and grouting, if there is a large amount of water leakage in the joint, water must be diverted first. That is, a deep hole is drilled to the water source with a pickaxe, a long pipe is buried, and water is pumped out to lower the water level in the joint before sealing.

[0014] The sealing grouting process should pay attention to the bonding between the new and old sealing materials. If the bonding is not good, the grout will react with water, generate gas, expand, and increase the internal pressure, causing a large amount of grout to escape and preventing it from penetrating to the intended depth, thus wasting grout.

[0015] The grouting material is epoxy resin.

[0016] After the grouting is completed, if the treatment effect is good, the grouting port should be sealed immediately with quick-hardening cement; otherwise, the treatment should continue until the expected effect is achieved.

[0017] 1. The present invention can complete the sealing work simply and quickly through the above steps, with little impact on the construction period;

[0018] 2. The iron sheet combination in this invention facilitates the sealing of irregular cracks, and the reaction force of the trapezoidal boss ensures sufficient grouting.

[0019] 2. The present invention can simultaneously seal multiple points through the above steps, ensuring the closure of the seepage channels inside the underground continuous wall. Attached Figure Description

[0020] Figure 1This is a flowchart illustrating the method for treating water leakage at the joints of the underground continuous wall.

[0021] Figure 2 This is a schematic diagram of crack surface treatment;

[0022] Figure 3 A schematic diagram of the installation of a rotatable iron plate assembly;

[0023] Figure 4 A schematic diagram of a cross-shaped iron sheet;

[0024] The markings in the diagram are: 1-stabilizing device, 2-grouting pipe, 21-grouting joint, 22-rotatable iron plate assembly, 23-grouting hole, 3-trapezoidal groove, 4-reaction pressure bar, and 24-cross-shaped iron plate component. Detailed Implementation

[0025] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0027] like Figures 1 to 2 As shown, in order to achieve the above objectives, the present invention is implemented through the following technical solution: Example 1

[0028] A method for treating water leakage from cracks in diaphragm walls involves repairing the cracks using a grouting device. The grouting device includes a stabilizing device 1 and a grouting pipe 2. The stabilizing device comprises a grouting joint 21, a rotatable iron plate assembly 22, and a reaction pressure rod 4. The grouting joint is located within a grouting hole 23 at the end of the rotatable iron plate assembly. The reaction pressure rod 4 is threaded onto the grouting joint. The iron plate assembly consists of multiple detachable iron plates, each with an arched protrusion in the middle and flat sides. The number of iron plates is determined according to the length of the crack during installation. The crack has a trapezoidal groove 3, and a reaction pressure bar is set outside the trapezoidal groove. Before grouting, the reaction pressure bar is tightened at the grouting crack. When grouting, the grouting impact will generate an outward force. The cooperation between the reaction pressure bar and the trapezoidal groove can better stabilize and fix the overall component. In addition, the rotatable iron plate group can be deformed according to the bending shape of the crack. The bottom of the arched protrusion in the middle of the iron plate is the grouting cavity, which is connected to the grouting joint and the grouting pipe. After the grouting liquid enters the grouting cavity, it is pressurized and enters the crack. The grouting pipe is connected to an external grouting pump. The treatment method is characterized by the following steps:

[0029] S1. First, treat the surface of the concrete crack by manually or with a pneumatic hammer to chisel a trapezoidal groove along the crack. Then clean both sides of the crack. The bottom of the trapezoidal groove is the end closest to the crack depth, and the top of the trapezoidal groove is the width away from the crack depth, that is, ensure that the bottom width is greater than the top width.

[0030] S2. Install a stabilizing device along the crack path, wherein rotatable iron plate groups are set according to different bending paths of the crack. After assembly, a grouting joint is installed at its end, and the upper part of the grouting joint is connected to a grouting pipe.

[0031] S3. Seal the cracks with quick-drying cement or cement-water glass grout, and then level them with cement mortar.

[0032] S4. Calculate the amount of grout used. After the grouting material has solidified, grout the cracks. During grouting, the grouting cavity is sealed inside the grouting body, and the inward-curving trapezoidal groove ensures the pressure requirements.

[0033] S5. After grouting is completed, seal the grouting port with quick-setting cement.

[0034] The trapezoidal groove, carved along the crack by hand or pneumatic pick, has a top width of 5 cm, a bottom width of 10 cm, and a depth of 10 cm. Example 2

[0035] To ensure the grouting pressure requirements, the present invention also includes a grouting device, which includes a stabilizing device and a grouting pipe. The stabilizing device includes a grouting joint and a rotatable iron plate assembly. The grouting joint is located at the end of the rotatable iron plate assembly. The iron plate assembly consists of multiple detachable iron plates. The iron plates have an arched protrusion in the middle and flat surfaces on both sides. During installation, the number of iron plates is determined according to the length of the crack, and they are installed in the trapezoidal groove of the crack. The rotatable iron plate assembly can be deformed appropriately according to the bending shape of the crack. The bottom of the arched protrusion in the middle of the iron plate is a grouting cavity, which is connected to the grouting joint and the grouting pipe. After the grouting fluid enters the grouting cavity, it is pressurized and enters the crack. The grouting pipe is connected to an external grouting pump. Example 3

[0036] To ensure the grouting pressure requirements, the present invention also includes a grouting device, which includes a stabilizing device and a grouting pipe. The stabilizing device includes a grouting joint and a rotatable iron plate assembly. The grouting joint is located at the end of the rotatable iron plate assembly. The iron plate assembly consists of multiple detachable iron plates. The iron plates have an arched protrusion in the middle and flat surfaces on both sides. During installation, the number of iron plates is determined according to the length of the crack, and they are installed in the trapezoidal groove of the crack. The rotatable iron plate assembly can be deformed appropriately according to the bending shape of the crack. The bottom of the arched protrusion in the middle of the iron plate is a grouting cavity, which is connected to the grouting joint and the grouting pipe. After the grouting fluid enters the grouting cavity, it is pressurized and enters the crack. The grouting pipe is connected to an external grouting pump.

[0037] When the crack is an intersecting crack, the iron sheet assembly includes at least one cross-shaped iron sheet 24, with arched protrusions in all four directions of the cross-shaped iron sheet to facilitate the connection of iron sheets in the vertical direction.

[0038] The connection between the grouting joint and the iron sheet can be configured as a two-end connection or a one-end connection, and the distance between the grouting pipes is set to 1~1.5 meters.

[0039] The grouting pipe includes a connecting pipe and a valve. The connecting pipe is a plastic pipe with a diameter of 1 / 2 to 1 / 4 inch and a length of 10 to 15 centimeters. One end of the connecting pipe is inserted into the grouting joint, and the other end is connected to the valve.

[0040] Before sealing and grouting, if there is a large amount of water leakage in the joint, water must be diverted first. That is, a deep hole is drilled to the water source with a pickaxe, a long pipe is buried, and water is pumped out to lower the water level in the joint before sealing.

[0041] The sealing grouting process should pay attention to the bonding between the new and old sealing materials. If the bonding is not good, the grout will react with water, generate gas, expand, and increase the internal pressure, causing a large amount of grout to escape and preventing it from penetrating to the intended depth, thus wasting grout.

[0042] When calculating the amount of grout used, if the leakage in the grout joint is not significant, the actual water injection volume is determined by injecting water, and the grouting volume is calculated using the following formula:

[0043] Grout usage = (1.2 × actual injected water volume + grout volume occupied by ground connection pipes) × grout specific gravity;

[0044] When concrete cracks have good communication with the soil layer (or the interior of the structure), resulting in significant water leakage, and the actual water injection volume cannot be determined, the grouting pressure is used for water injection. The water consumption per unit time and the gel time of the prepared grout are then calculated to determine the amount of grout needed. The relationship is as follows:

[0045] Grout usage = (1.2 × actual injected water volume × grout gelation time + grout volume occupied by ground connection pipe) × grouting time required.

[0046] The grouting material is epoxy resin.

[0047] After the grouting is completed, if the treatment effect is good, the grouting port should be sealed immediately with quick-hardening cement; otherwise, the treatment should continue until the expected effect is achieved.

[0048] The above description is merely a preferred embodiment of the present invention and does not constitute any limitation on the structure of the present invention. Any simple modifications, equivalent changes, or alterations made to the above embodiments based on the technical essence of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. A method for treating water leakage at joints of diaphragm walls, comprising repairing cracks using a grouting device, wherein the grouting device includes a stabilizing device and a grouting pipe, the stabilizing device including a grouting joint, a rotatable iron plate assembly, and a reaction pressure rod, the grouting joint being disposed within a grouting hole at the end of the rotatable iron plate assembly, the reaction pressure rod being threadedly connected to the grouting joint, the iron plate assembly consisting of multiple detachable iron plates, each iron plate having an arched protrusion in the middle and flat sides, the iron plates being arranged according to the length of the crack during installation. The quantity is such that it is installed in the trapezoidal groove of the crack, and is set outside the trapezoidal groove by a reaction pressure rod. Before grouting, the reaction pressure rod is tightened at the grouting crack. When grouting, the grouting impact will generate an outward force. The overall component is fixed by the cooperation of the reaction pressure rod and the trapezoidal groove. In addition, the rotatable iron plate assembly deforms according to the bending shape of the crack. The bottom of the arched protrusion in the middle of the iron plate is the grouting cavity, which is connected to the grouting pipe through the grouting joint. After the grouting liquid enters the grouting cavity, it is pressurized and enters the crack. The grouting pipe is connected to an external grouting pump. The characteristic is that... The processing method includes the following steps: S1. First, treat the surface of the concrete crack by manually or with a pneumatic hammer to chisel a trapezoidal groove along the crack. Then clean both sides of the crack. The bottom of the trapezoidal groove is the end closest to the crack depth, and the top of the trapezoidal groove is the width away from the crack depth, that is, ensure that the bottom width is greater than the top width. The grouting joint is connected to the iron plate, and the distance between the grouting pipes is set to 1-1.5 meters. S2. Install a stabilizing device along the crack path, wherein rotatable iron plate groups are set according to different bending paths of the crack. After assembly, a grouting joint is installed at its end, and the upper part of the grouting joint is connected to a grouting pipe. S3. Seal the cracks with quick-drying cement or cement-water glass grout, and then level them with cement mortar. S4. Calculate the amount of grout used. After the grouting material has solidified, grout the crack. During grouting, the grouting cavity is sealed inside the grouting body, and the inward-curving form of the trapezoidal groove ensures the pressure requirements. S5. After grouting is completed, seal the grouting port with quick-setting cement. If the treatment effect is good after grouting is completed, seal the grouting port with quick-setting cement immediately; otherwise, continue the treatment until the expected effect is achieved.

2. The method for treating water leakage at joints of diaphragm walls according to claim 1, characterized in that: The trapezoidal groove, carved along the crack by hand or pneumatic pick, has a top width of 5 cm, a bottom width of 10 cm, and a depth of 10 cm.

3. The method for treating water leakage at joints of diaphragm walls according to claim 2, characterized in that: When the crack is an intersecting crack, the iron sheet assembly includes at least one cross-shaped iron sheet component. The cross-shaped iron sheet component has arched protrusions in all four directions to facilitate the connection of iron sheets in the vertical direction.

4. The method for treating water leakage at joints of diaphragm walls according to claim 1, characterized in that: The grouting pipe includes a connecting pipe and a valve. The connecting pipe is a plastic pipe with a diameter of 1 / 2-1 / 4 inch and a length of 10-15 cm. One end of the connecting pipe is inserted into the grouting joint, and the other end is connected to the valve.

5. The method for treating water leakage at joints of diaphragm walls according to claim 1, characterized in that: Before sealing and grouting, if there is a large amount of water leakage in the joint, water must be diverted first. This involves drilling a deep hole to the water source, burying a long pipe, and using a pump to lower the water level in the joint before sealing.

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