Waterproof and anti-crack type cement mixing wall, leak stopping device and use method thereof

Abstract

A waterproof and crack-resistant cement mixing wall, a leak-stopping device, and its usage method are disclosed. The device includes a reinforcing mesh, a drill cylinder, a grouting pipe, and a dense mesh. The reinforcing mesh is positioned on both sides at the midpoint of the inner sides of two opposing steel sections, ensuring it is vertically located in the center of the cement mixing wall. The reinforcing mesh is hollow inside, with grouting holes at its top. A drill bit is detachably mounted at the front end of the drill cylinder for drilling through the cement mixing wall and the reinforcing mesh. The grouting pipe can be inserted into the drill cylinder, and its front end is detachably connected to the drill bit, allowing the drill bit to be removed from the drill cylinder. The dense mesh is installed on the outer wall of the grouting pipe's front end via multiple rotatable support rods. The dense mesh extends beyond the drill cylinder along with the grouting pipe, and the support rods allow the mesh to be opened to an angle perpendicular to the outer wall of the drill cylinder. This invention solves the seepage problem in the supported area, forming two sealing barriers. Construction is convenient and quick, reducing construction time and cost, and improving construction quality.

Description

Technical Field

[0001] This invention relates to the field of ultra-deep foundation pit construction, and in particular to a waterproof and crack-resistant cement mixing wall, a leak-stopping device, and its usage method. Background Technology

[0002] For deep foundation pit excavation in areas with poor soil conditions and high water levels, steel-concrete mixing walls are required for support engineering. Currently, in the construction of underground passages and spaces in areas with high water levels, steel-concrete mixing walls are commonly used as a cost-effective support method, as the removability of steel sections greatly improves the turnover of the support structure. However, in high water levels, the limited pressure resistance of steel-concrete mixing walls makes them prone to cracking, seepage, and even blowouts due to excessive water pressure, significantly impacting the effectiveness of the support and subsequent construction. Once cracks appear, the difference in water pressure between the inside and outside makes repair and sealing extremely difficult, increasing the construction complexity and sealing costs. Therefore, exploring the crack resistance and leakage repair of cement mixing walls in underground passage construction in high water levels is a key research area, urgently requiring the development of a waterproof and crack-resistant cement mixing wall and its matching sealing device. Summary of the Invention

[0003] To address the above problems, this invention proposes a waterproof and crack-resistant cement mixing wall, a leak-stopping device, and its usage method. The specific technical solution is as follows:

[0004] A waterproof and crack-resistant cement mixing wall sealing device includes:

[0005] The reinforcing mesh is set on the middle of the inner sides of the two steel sections on both sides, so that the reinforcing mesh is vertically located in the middle of the cement mixing wall. The reinforcing mesh is hollow inside and has grouting holes at the top.

[0006] The drill barrel has a drill bit detachably mounted at its front end for drilling through cement mixing walls and reinforcing mesh.

[0007] A grouting pipe, which can be inserted into the drill barrel, and whose front end is detachably connected to the drill bit, and which can drive the drill bit to be removed from the drill barrel; and

[0008] The dense mesh is installed on the outer wall of the front end of the grouting pipe by multiple rotatable struts. The dense mesh can extend out of the drill barrel along with the grouting pipe, and the struts can be used to open the dense mesh to an angle perpendicular to the outer wall of the drill barrel.

[0009] Furthermore, the reinforcing mesh is made of plastic and has an internal interwoven pipe network structure with steel wire mesh pre-installed on the inner wall of the pipe network.

[0010] Furthermore, the drill bit is threadedly connected to the drill barrel, the tail end of the drill bit is provided with a locking block, and the front end of the grouting pipe is provided with a locking groove that can be fitted into the locking block.

[0011] Furthermore, the card block is cross-shaped, the card slot is a cross-shaped groove, and mortar can flow out from the card slot.

[0012] Furthermore, the end of the support rod is connected to the outer wall of the grouting pipe via a torsion spring, and the support rod can rotate around the torsion spring to a position that is close to the outer wall of the grouting pipe, so that the support rod can be inserted into the drill barrel along with the grouting pipe. The elastic force of the torsion spring makes the initial position of the support rod perpendicular to the outer wall of the drill barrel.

[0013] A method for using a waterproof and crack-resistant cement mixing wall sealing device includes the following steps:

[0014] (1) At the construction site, the wall structure is formed by excavation using a grab bucket, cement soil is poured in, and then the steel sections are inserted into the cement soil and fixed according to the design position.

[0015] (2) Insert the reinforcing mesh into the middle of the inner sides of the two steel sections, and fix the top of the reinforcing mesh to the steel section;

[0016] (3) Before the cement mixing wall solidifies, fill the reinforcing mesh with water through the grouting hole;

[0017] (4) Excavation shall be carried out after the cement mixing wall is completed, and the cement mixing wall shall be observed to see if there are any local leakage points.

[0018] (5) Connect the drill bit to the drill barrel with threads, connect the tail of the drill barrel to the drilling machine, control the drill bit to drill through the cement mixing wall from the seepage point, and drain the water in the reinforcement mesh;

[0019] (6) Rotate the support rod to a position where it is in close contact with the outer wall of the grouting pipe, then insert the grouting pipe into the drill barrel and insert the clamp into the groove;

[0020] (7) Keep the drill barrel fixed and rotate the grouting pipe in the opposite direction to remove the drill bit from the drill barrel;

[0021] (8) Push the grouting pipe to continue moving into the soil outside the cement mixing wall. The support rod is opened to a certain angle under the action of the torsion spring. Pull the grouting pipe back so that the support rod is fully opened to be perpendicular to the outer wall of the drill barrel.

[0022] (9) Inject sealing mortar from the rear end of the grouting pipe, so that the sealing mortar is injected from the front end of the grouting pipe and fills the root position of the leakage point, forming a local grouting area. Under the action of the dense mesh, the solidified mortar is easily bound together to form a stable sealing area.

[0023] (10) After removing the drill pipe, inject sealing mortar through the grouting hole at the top of the reinforcing mesh. The sealing mortar fills the pores formed by the drill pipe, forming a complete repair and sealing.

[0024] Furthermore, the sealing mortar is a mixture of water glass and quick-drying mortar.

[0025] A waterproof and crack-resistant cement mixing wall, wherein the cement mixing wall is provided with the above-mentioned reinforcing mesh and the above-mentioned leak-sealing device.

[0026] Furthermore, when localized leakage occurs in the cement mixing wall, the above-mentioned method is used to seal and repair it using a leak-sealing device.

[0027] Beneficial effects of this invention:

[0028] (1) This invention solves the problem of water seepage in the support area, forms two sealing barriers, is convenient and quick to construct, reduces the construction period and cost, and improves the construction quality.

[0029] (2) The present invention adds a reinforcing mesh inside the cement mixing wall, which can enhance the overall rigidity of the cement mixing wall structure, effectively connect and fix the overall wall, and prevent the wall from cracking and seeping water.

[0030] (3) The reinforcing mesh of the present invention not only solves the stability problem of the steel cement mixing wall, but also allows for effective grouting repair after leakage in the later stage. By drilling the rubber tube in the seepage point area, pressure grouting can be carried out from the grouting hole to reinforce the middle part of the cement mixing wall.

[0031] (4) The present invention utilizes a grouting pipe to allow the drill bit to detach and grout to seal the leakage area, thereby reinforcing from the root and achieving a significant sealing effect.

[0032] (5) The present invention uses a dense mesh set on the outside of the grouting pipe by a support rod, so that the solidified grout can be easily bound together and not easily dispersed and washed away, forming a stable sealing area, improving the reinforcement strength and crack resistance. Attached Figure Description

[0033] Figure 1 This is a top view of the cement mixing wall of the present invention.

[0034] Figure 2 This is a front view of the steel profile and reinforcing mesh of the present invention.

[0035] Figure 3 This is a schematic diagram illustrating the process of using the leak-sealing device of the present invention.

[0036] Figure 4 This is a schematic diagram of the leak-sealing device of the present invention after the dense mesh has been opened.

[0037] Figure 5 This is a front view of the dense mesh of the present invention after it has been unfolded.

[0038] In the diagram: 1. Steel section, 2. Reinforcing mesh, 3. Wire mesh, 4. Grouting hole, 5. Drill barrel, 6. Drill bit, 7. Grouting pipe, 8. Support rod, 9. Rotary shaft seat, 10. Torsion spring, 11. Locking block, 12. Locking groove, 13. Dense mesh, 14. Cement mixing wall. Detailed Implementation

[0039] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0040] In the description of this application, "multiple" means two or more, unless otherwise explicitly specified. It should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" 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, an electrical connection, or a connection that allows communication; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0041] like Figures 1 to 5 As shown, a leak-stopping device for a waterproof and crack-resistant cement mixing wall includes a reinforcing mesh 2, a drill cylinder 5, a grouting pipe 7, and a dense mesh 13.

[0042] The reinforcing mesh 2 is respectively located on the middle of the inner sides of the two steel sections 1, so that the reinforcing mesh 2 is vertically located in the middle of the cement mixing wall 14. The reinforcing mesh 2 is hollow inside and has a grouting hole 4 at its top, wherein the grouting hole 4 can extend out of the top outer side of the reinforcing mesh 2.

[0043] The drill bit 6 is detachably mounted on the front end of the drill barrel 5 for drilling through the cement mixing wall 14 and the reinforcing mesh 2.

[0044] The grouting pipe 7 can be inserted into the drill barrel 5, and the front end of the grouting pipe 7 is detachably connected to the drill bit 6, and the drill bit 6 can be driven to be disassembled from the drill barrel 5.

[0045] The dense mesh 13 is installed on the outer wall of the front end of the grouting pipe 7 by a plurality of rotatable support rods 8. The dense mesh 13 can extend out of the drill barrel 5 along with the grouting pipe 7, and the support rods 8 are used to open the dense mesh 13 to an angle perpendicular to the outer wall of the drill barrel 5.

[0046] Specifically, after the drill bit 6 is connected to the drill cylinder 5, it can drill through the cement mixing wall 14, and grout the leakage area through the grouting pipe 7. Then, grout the drill hole formed by the drill cylinder 5 through the grouting hole 4 to repair it, thereby completing the complete sealing and solving the water seepage problem in the support area.

[0047] like Figure 2 As shown, the reinforcing mesh 2 is made of plastic and has an internal interwoven pipe network structure. Steel wire mesh 3 is pre-installed on the inner wall of the pipe network of the reinforcing mesh 2. According to design requirements, the reinforcing mesh 2 is made to a width that matches the distance between the two steel profiles 1, allowing it to be smoothly inserted between them. After the cement mixing wall 14 is constructed, the reinforcing mesh 2 strengthens the overall rigidity of the cement mixing wall 14 structure, effectively connecting and fixing the entire wall, thereby preventing the cement mixing wall 14 from cracking and leaking.

[0048] like Figure 3 , 4 As shown in Figure 5, the drill bit 6 is threadedly connected to the drill barrel 5, and a locking block 11 is provided at the tail end of the drill bit 6. The front end of the grouting pipe 7 is provided with a slot 12 that can be fitted into the locking block 11.

[0049] In one embodiment, the card block 11 is cross-shaped, the card slot 12 is a cross-shaped groove, and mortar can flow out from the card slot 12.

[0050] The cross-shaped slot 12 can be quickly engaged with the cross-shaped block 11, thereby rotating the grouting pipe 7 to drive the drill bit 6 to rotate, so that the drill bit 6 can be removed from the drill barrel 5; if the grouting pipe 7 is pushed forward, it can be extended outside the cement mixing wall 14.

[0051] In one embodiment, the end of the support rod 8 is connected to the outer wall of the grouting pipe 7 via a torsion spring 10, and the support rod 8 can rotate around the torsion spring 10 to a position that is close to the outer wall of the grouting pipe 7, so that the support rod 8 can be inserted into the drill barrel 5 along with the grouting pipe 7. The elastic force of the torsion spring 10 makes the initial position of the support rod 8 perpendicular to the outer wall of the drill barrel 5.

[0052] like Figure 5 As shown, the grouting pipe 7 is symmetrically equipped with a pivot seat 9 on the outer wall near the front end, and the torsion spring 10 is installed on the pivot seat 9. When the torsion spring 10 is not subjected to external force, the strut 8 opens the mesh 13 into an open state. The mortar injected at the leakage point will be pulled by the mesh 13, which will improve the reinforcement strength and crack resistance of the mortar, thereby improving the waterproof and crack-resistant performance of the cement mixing wall 14.

[0053] A method for using a waterproof and crack-resistant cement mixing wall sealing device includes the following steps:

[0054] (1) On-site layout and positioning to confirm the construction scope of cement mixing wall 14; use grab bucket to excavate to form wall structure, pour cement soil in, and then insert steel section 1 into cement soil according to the design position for fixation.

[0055] (2) Insert the reinforcing mesh 2 into the middle of the inner sides of the two steel sections 1, and fix the top of the reinforcing mesh 2 to the steel section 1;

[0056] (3) Before the cement mixing wall 14 solidifies, fill the reinforcing mesh 2 with water through the grouting hole 4 to prevent the cement soil pressure from causing deformation inside the reinforcing mesh 2, which would prevent the grouting operation from being completed later.

[0057] (4) After the cement mixing wall 14 is completed and the excavation conditions are met, the excavation operation is carried out, and the cement mixing wall 14 is observed to see if there are any local leakage points; if leakage points are found, the following steps are taken to plug and repair the leaks.

[0058] (5) Connect the drill bit 6 to the drill barrel 5 with a thread, connect the tail of the drill barrel 5 to the drilling machine, control the drill bit 6 to drill through the cement mixing wall 14 from the seepage point, and drain the water in the reinforcement mesh 2.

[0059] (6) Manually rotate the support rod 8 to a position where it is close to the outer wall of the grouting pipe 7, gather the dense mesh 13, insert the grouting pipe 7 into the drill barrel 5, and the dense mesh 13 will move with the grouting pipe 7 in the drill barrel 5. Then insert the clamp 11 into the clamp slot 12.

[0060] (7) Keep the drill barrel 5 fixed, rotate the grouting pipe 7 in the opposite direction to make the drill bit 6 rotate and remove it from the drill barrel 5;

[0061] (8) Push the grouting pipe 7 to continue moving into the soil outside the cement mixing wall 14. Due to water leakage in this area, local quicksand hollowing will occur outside the support in this area. When the support rod 8 is completely moved out of the cement mixing wall 14, under the action of the torsion spring 10, the support rod 8 will be stretched outward in the quicksand hollowing area at a certain angle, so that the range stretched by each support rod 8 is greater than the inner diameter of the drill barrel 5. Thus, when the grouting pipe 7 is pulled back, the outer end of the support rod 8 can be pressed tightly against the cement mixing wall 14 and fully stretched to a position perpendicular to the outer wall of the drill barrel 5, so that the dense mesh 13 is fully opened.

[0062] (9) Inject sealing mortar from the rear end of the grouting pipe 7, so that the sealing mortar is injected from the cross-shaped groove at the front end of the grouting pipe 7 and fills the root position of the leakage point, forming a local grouting area. Under the action of the dense mesh 13, the solidified mortar is easily bound together and not easily dispersed and washed away, forming a stable sealing area as the first barrier for sealing.

[0063] (10) After removing the drill pipe 5, inject sealing mortar into the grouting hole 4 at the top of the reinforcing mesh 2. The sealing mortar fills the pores formed by the drill pipe 5, forming a complete repair seal and serving as the second barrier for sealing.

[0064] It should be noted that the sealing mortar is a mixture of water glass and quick-drying mortar, and is injected under pressure, which results in a good sealing and repair effect and can completely solve the water seepage problem of the 14 cracks in the steel-cement mixing wall.

[0065] In addition, the grouting pipe 7 after the sealing and repair is completed can be left inside the cement mixing wall 14, and the excess part at its tail end can be sawed off or cut off.

[0066] This application also provides a waterproof and crack-resistant cement mixing wall, wherein the cement mixing wall 14 is provided with the above-mentioned reinforcing mesh 2 and the above-mentioned leak-stopping device is provided in conjunction. The reinforcing mesh 2 is installed in the middle of the inner side of the two steel profiles 1, thereby solving the problem that the traditional steel cement mixing wall 14 is prone to cracking and water seepage after construction due to water pressure.

[0067] Meanwhile, when local leakage occurs in the cement mixing wall 14, the above-mentioned method is used to seal and repair it using a leak-stopping device, forming two sealing barriers. The construction is convenient and quick, reducing the construction cycle and cost, and improving the construction quality.

[0068] In addition, if the cement mixing wall 14 does not leak, the water in the reinforcing mesh 2 can be pumped out, and then sealing mortar can be injected into the grouting hole 4 to strengthen the overall rigidity of the cement mixing wall 14 structure.

[0069] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A method for using a waterproof and crack-resistant cement mixing wall sealing device, characterized in that, Includes the following steps: (1) The construction site uses a grab bucket to excavate and form a wall structure, pours in cement soil, and then inserts the steel sections into the cement soil according to the design position and fixes them. (2) Insert the reinforcing mesh into the middle of the inner sides of the two steel sections, and fix the top of the reinforcing mesh to the steel section; (3) Before the cement mixing wall solidifies, fill the reinforcing mesh with water through the grouting holes; (4) Excavation shall be carried out after the cement mixing wall construction is completed, and the presence of any local leakage points in the cement mixing wall shall be observed. (5) Connect the drill bit to the drill barrel with threads, connect the tail of the drill barrel to the drilling machine, control the drill bit to drill through the cement mixing wall from the seepage point, and drain the water in the reinforcement mesh; (6) Rotate the support rod to a position where it is in close contact with the outer wall of the grouting pipe, then insert the grouting pipe into the drill barrel and insert the clamp into the slot; (7) Keep the drill barrel fixed and rotate the grouting pipe in the opposite direction to remove the drill bit from the drill barrel; (8) Push the grouting pipe to continue moving into the soil outside the cement mixing wall. The support rod is opened to a certain angle under the action of the torsion spring. Pull the grouting pipe back so that the support rod is fully opened to be perpendicular to the outer wall of the drill barrel. (9) Inject sealing mortar from the rear end of the grouting pipe, so that the sealing mortar is injected from the front end of the grouting pipe and fills the root position of the leakage point, forming a local grouting area. Under the action of the dense mesh, the solidified mortar is easily bound together to form a stable sealing area. (10) After removing the drill pipe, inject sealing mortar through the grouting hole at the top of the reinforcing mesh. The sealing mortar fills the pores formed by the drill pipe, forming a complete repair and sealing. The leak-sealing device includes: The reinforcing mesh is set on the middle of the inner sides of the two steel sections on both sides, so that the reinforcing mesh is vertically located in the middle of the cement mixing wall. The reinforcing mesh is hollow inside and has grouting holes at the top. The drill barrel has a drill bit detachably mounted at its front end for drilling through cement mixing walls and reinforcing mesh. A grouting pipe, which can be inserted into the drill barrel, and whose front end is detachably connected to the drill bit, and which can drive the drill bit to be removed from the drill barrel; and The dense mesh is installed on the outer wall of the front end of the grouting pipe by multiple rotatable struts. The dense mesh can extend out of the drill barrel along with the grouting pipe, and the struts can be used to open the dense mesh to an angle perpendicular to the outer wall of the drill barrel.

2. The method of use according to claim 1, characterized in that, The reinforcing mesh is made of plastic and has an internal interwoven pipe network structure with steel wire mesh pre-installed on the inner wall of the pipe network.

3. The method of use according to claim 1, characterized in that, The drill bit is threadedly connected to the drill barrel, and a locking block is provided at the tail end of the drill bit. The front end of the grouting pipe is provided with a slot that can be fitted into the locking block.

4. The method of use according to claim 3, characterized in that, The card block is cross-shaped, the card slot is a cross-shaped groove, and mortar can flow out from the card slot.

5. The method of use according to claim 1, characterized in that, The end of the support rod is connected to the outer wall of the grouting pipe by a torsion spring, and the support rod can rotate around the torsion spring to a position that is close to the outer wall of the grouting pipe, so that the support rod can be inserted into the drill barrel along with the grouting pipe. The elastic force of the torsion spring makes the initial position of the support rod perpendicular to the outer wall of the drill barrel.

6. The method of use according to claim 1, characterized in that, The sealing mortar is a mixture of water glass and quick-drying mortar.

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