Underground impact protection wall provided with a communication pipe

Abstract

The utility model relates to underground anti-scour wall with communicating pipe, and the wall body is distributed with several communicating pipes, and the communicating pipe is constituted by vertical communicating pipe and several branch communicating pipes, and the branch communicating pipes of same communicating pipe are arranged on both sides of vertical communicating pipe, and the branch communicating pipe is horizontally arranged, and its inner end is connected with vertical communicating pipe, and its outer end is opened on the wall surface, and the branch communicating pipes on both sides of same vertical communicating pipe are staggered in vertical direction, and the branch communicating pipe is filled with filter material. The utility model constructs the communicating pipe on both sides of ground connected wall, and avoids or reduces the blockage of communicating pipe caused by concrete pouring, and is suitable for underground anti-scour wall and other ground connected wall.

Description

Technical Field

[0001] This utility model relates to an underground anti-erosion wall equipped with a connecting pipe. Background Technology

[0002] When the water level on both sides of a continuous wall such as an underground scour barrier changes, the pressure difference between the two sides can cause displacement or tilting of the wall's centerline, adversely affecting the wall and related structures. One possible solution is to install through-wall pipes as connecting pipes to achieve communication between the two sides, thereby balancing the water level or pressure and avoiding significant water level differences caused by long-term isolation of the two sides by the wall. However, currently, most underground scour barriers and other continuous walls are made of concrete / reinforced concrete structures. During the concrete pouring process, under the pressure of pouring / the weight of the concrete, concrete may enter through the port of the through-wall pipe, causing blockage and affecting its effectiveness. Utility Model Content

[0003] The purpose of this invention is to construct a connecting pipe that connects the two sides of the wall and avoids or reduces blockages caused by concrete pouring.

[0004] The technical solution of this utility model is: an underground anti-erosion wall with connecting pipes, in which several connecting pipes (or connecting pipes) are distributed within the wall. The connecting pipes are composed of vertical connecting pipes and several branch connecting pipes. The branch connecting pipes of the same connecting pipe are arranged on both sides of the vertical connecting pipe. The branch connecting pipes are set horizontally, with their inner ends connected to the vertical connecting pipes and their outer ends opening onto the wall surface.

[0005] Preferably, the branch connecting pipe extends laterally (along the thickness of the wall, or in other words, along the direction perpendicular to the wall) to facilitate the flow of water on both sides.

[0006] Preferably, the branch connecting pipes located on both sides of the same vertical connecting pipe are staggered vertically.

[0007] Preferably, the branch connecting pipes on both sides of the vertical connecting pipe are evenly spaced, and the spacing between the branch connecting pipes on both sides is the same (the vertical spacing between the branch connecting pipes on one side is equal to the vertical spacing between the branch connecting pipes on the other side).

[0008] Preferably, a sealing cap is provided at the bottom end of the vertical connecting pipe.

[0009] Preferably, a sealing cap is provided at the top of the vertical connecting pipe.

[0010] Preferably, the sealing cap at the top of the connecting pipe is connected to the top of the vertical connecting pipe in a detachable manner (e.g., snap-fit, threaded connection, fastening).

[0011] Preferably, the branch connecting pipe is filled with filter media.

[0012] Preferably, the filter material filled in the branch connecting pipe is gravel (gravel, crushed stone particles).

[0013] Preferably, the gravel material located inside the branch connecting pipe is wrapped with a filter cloth (a water-permeable flexible sheet material, such as non-woven fabric). For example, two layers of non-woven fabric can be made into a tube, its front end is tied together, and it is passed from one end of the branch connecting pipe to the other end. The gravel material is loaded into the tube of non-woven fabric located inside the branch connecting pipe from the rear end, and the rear end is also tied together after it is full.

[0014] Preferably, cross ribs are provided at both ends of the branch connecting pipe to block the filter media inside the branch connecting pipe.

[0015] Preferably, the branch connecting pipe and the vertical connecting pipe are connected by a connecting fitting (e.g., a tee) to avoid affecting the corrosion resistance due to large-area welding.

[0016] Preferably, the connecting pipes are distributed at equal intervals in the longitudinal direction (along the wall direction).

[0017] The beneficial effects of this utility model are as follows: Because of the vertical connecting pipe and branch connecting pipes, pressure testing and unblocking can be performed after the wall is poured, thus eliminating blockages caused by concrete pouring; because the branch connecting pipes are equipped with granular filter material, blockages during use are effectively avoided or reduced, and regular pressure testing and unblocking / maintenance can be performed, which helps maintain drainage function and extends service life; because the branch connecting pipes on both sides are staggered, pressure testing and unblocking can be performed on each branch connecting pipe separately, ensuring smooth drainage in each branch connecting pipe; because pressure testing and unblocking are performed using a pressure testing pipe with upper and lower plugs, the plugs seal the annular gap between the pressure testing pipe and the vertical connecting pipe above and below the branch connecting pipe to be unblocked, preventing pressure leakage and ensuring the effectiveness of pressure testing, unblocking, and testing.

[0018] This utility model is applicable to underground anti-erosion walls and other diaphragm walls. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the underground erosion barrier;

[0020] Figure 2 This is a schematic diagram involving pressure testing and unblocking methods for connecting pipes;

[0021] Figure 3 This is a partial structural diagram of a double-plug pressure-pressurizing hose used for pressure testing and unblocking, showing its operational state.

[0022] The markings in the diagram are: 10, wall; 20, vertical connecting pipe; 30, branch connecting pipe; 40, pressure pipe; 41, pressure auxiliary pipe; 42, pressure outlet; 45, upper plug; 46, lower plug; 48, pressure main pump; 49, pressure auxiliary pump. Detailed Implementation

[0023] See Figures 1 to 3 The vertical connecting pipe 20 is installed at the horizontal center of the wall 10, with its top opening at the top surface of the wall and its bottom end adjacent to the bottom edge of the wall. The vertical connecting pipe uses DN80 galvanized steel pipe (4mm) and is 14.5m long (length adjustable as needed). Its bottom end can be located 0.5m below the lowest branch connecting pipe (referred to as the branch pipe) for pressure testing. A sealing cap is installed at the bottom of the vertical connecting pipe to prevent concrete and slurry from entering the pipe. A branch connecting pipe 30 is installed every 1m vertically, with alternating branch connecting pipes on both sides. Connecting fittings are used to connect the inner ends of the branch connecting pipes to the vertical connecting pipe. The branch connecting pipe uses DN80 galvanized steel pipe with cross-shaped ribs welded to both ends. A double-layer non-woven fabric tube (10kN / m) is inserted inside the pipe, filled with gravel material. The tube should typically be completely filled to prevent slurry and concrete from entering the connecting pipe and also to provide good filtration.

[0024] After the connecting pipes (vertical connecting pipes and branch connecting pipes connected to the vertical connecting pipes) are assembled, they are installed in the wall in a distributed manner, and the whole assembly is installed into the reinforcing cage. The branch connecting pipes can be securely connected to the horizontal reinforcing bars (e.g., tied). Then the reinforcing cage is hoisted into the trench, and the ends of the branch connecting pipes should be as close as possible to the trench wall to reduce concrete ingress.

[0025] The position of the connecting pipes (vertical connecting pipes and branch connecting pipes) can be finely adjusted according to the actual site conditions.

[0026] Due to the shape and size of the connecting pipe, it needs to be placed in a suitable position in the reinforcing cage before welding the horizontal and main reinforcing bars.

[0027] A pressure pump and pressure hose can be used to pressurize and unclog branch connecting pipes. After use, pressure unclogging can also be performed as needed.

[0028] The pressure-pressuring pipe (or main pressure-pressuring pipe) 40 can be made of high-pressure explosion-proof rubber tubing. Two plugs (e.g., annular water bladders, or, where appropriate, annular air bladders) are fitted onto the outer side of the near-end region of the pressure-pressuring pipe; these are the upper plug 45 and the lower plug 46. The pressure-pressuring outlet 42 of the pressure-pressuring pipe is located between the upper and lower plugs. An integrated pressure-pressuring secondary pipe (double plug connecting pipe) 41 for pressurizing the double plugs (upper and lower plugs) is integrated into the pressure-pressuring pipe. The pressure-pressuring secondary pipe connects to the outlet of the pressure-pressuring secondary pump. By pressurizing the upper and lower plugs through the pressure-pressuring secondary pump, the double plugs expand, sealing the annular gap between the pressure-pressuring pipe and the vertical connecting pipe. Afterward, the pressure-pressuring outlet of the pressure-pressuring pipe is only connected to the upper and lower plugs. The branch connecting pipes are connected, but because the outer end of the branch connecting pipe is usually blocked by concrete to some extent, the resistance is relatively large, resulting in a high pressure on the pressure pump. When the concrete blocking the branch connecting pipe is flushed away, the resistance decreases significantly, and the output pressure of the pressure pump also decreases significantly. Therefore, a significant drop in pressure on the pressure pump can be used as a criterion for successful unblocking. If the branch connecting pipe is not blocked by concrete, the pressure of the pressure pump will be significantly lower than the pressure when the branch connecting pipe was blocked after the pressure pump starts. In this case, the branch connecting pipe can also be judged as unblocked. The pressure range of the unblocked state (branch connecting pipe is unblocked / not blocked) can be determined based on experience or theoretical calculations (e.g., the pressure range after a significant drop in pressure on the pressure pump under similar circumstances).

[0029] In the construction of underground erosion control walls and drainage systems, connecting pipes are fixed to the reinforcing cage according to their intended distribution on the wall. These connecting pipes are placed (e.g., suspended) in a trench, with the ends of the branch connecting pipes fitting (as close as possible) to the trench. After the initial setting of the concrete but before its final setting, each branch connecting pipe is pressurized with water (this can be called the initial pressure test). Two pressure testing pumps are used: a main pump (also called a pressure pump, such as a grouting pump) 48 is used for pipeline pressure testing, with a pressure of not less than 30 MPa; the auxiliary pump 49, which can be a small pressure pump (pressure not less than 10 MPa), is used to fill the upper and lower plugs on the pressure testing pipes with water, and can also be called a pressure plug pump. High-pressure explosion-proof rubber hoses can be used for the pressure testing pipes.

[0030] Specifically: The double-plug pressure-pressurizing tube is inserted into the vertical connecting pipe, with the upper plug and lower plug positioned above and below the opening of the branch connecting pipe to be pressurized and cleared within the vertical connecting pipe, respectively, and there are no other branch connecting pipe openings between the upper plug and the lower plug. Pressure medium (e.g., water or air) is introduced into the upper and lower plugs, causing them to expand and seal the annular gap between the outer wall of the pressure-pressurizing tube and the inner wall of the vertical connecting pipe. Pressure medium (e.g., water) is applied (pumped) into the pressure-pressurizing tube. When the pressure of the pressure pump (output pressure) drops significantly or the pressure of the pressure pump (output pressure) is within the pressure range for clearing, the pressurization and clearing of the corresponding branch connecting pipe is completed.

[0031] Before pressurization, mark the locations of each branch connecting pipe on the pressurization pipe to avoid difficulty in finding the branch connecting pipe during pressurization. The water pressure should be between 2 MPa and 10 MPa until the pressure drops, which indicates successful water supply.

[0032] After the concrete of the erosion barrier wall has fully set, a second pressure test (secondary pressure test) is conducted to ensure the water flow rate. The method of the secondary pressure test is the same as that of the first pressure test.

[0033] After the pressure test is completed, the soil on both sides of the erosion barrier will be excavated in a certain proportion (the excavation depth can be determined according to actual needs and requirements), and the water flow of the connecting pipe will be visually inspected.

[0034] Unless otherwise specified, the preferred and optional technical means disclosed in this utility model can be arbitrarily combined to form several different specific embodiments when one preferred or optional technical means is a further limitation of another technical means.

Claims

1. An underground erosion barrier equipped with a connecting pipe, characterized in that... Several connecting pipes are distributed within the wall. The connecting pipes consist of a vertical connecting pipe and several branch connecting pipes. The branch connecting pipes of the same connecting pipe are arranged on both sides of the vertical connecting pipe. The branch connecting pipes are set horizontally, with their inner ends connected to the vertical connecting pipes and their outer ends opening onto the wall surface.

2. The underground erosion barrier as described in claim 1, characterized in that... Branch connecting pipes located on both sides of the same vertical connecting pipe are staggered vertically.

3. The underground erosion barrier as described in claim 1, characterized in that... The branch connecting pipes on both sides of the vertical connecting pipe are distributed at equal intervals, and the spacing between the branch connecting pipes on both sides is the same.

4. The underground erosion barrier as described in claim 1, characterized in that... The branch connecting pipe and the vertical connecting pipe are connected by connecting pipe fittings.

5. The underground erosion barrier as described in claim 1, characterized in that... A sealing cap is provided at the bottom of the vertical connecting pipe.

6. The underground erosion barrier as described in claim 1, characterized in that... The top of the vertical connecting pipe is equipped with a sealing cap, and the sealing cap at the top of the connecting pipe is connected to the top of the vertical connecting pipe in a detachable manner.

7. The underground erosion barrier as described in any one of claims 1-6, characterized in that... The branch connecting pipe is filled with filter media.

8. The underground erosion barrier as described in claim 7, characterized in that... The filter media filled in the branch connecting pipe is sand and gravel.

9. The underground erosion barrier as described in claim 8, characterized in that... The gravel material inside the branch connecting pipe is wrapped with non-woven fabric.

10. The underground erosion barrier as described in claim 9, characterized in that... Cross-shaped ribs are installed at both ends of the branch connecting pipe to block the filter media inside the branch connecting pipe.

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