Reinforced concrete inner layer well wall capable of automatically relieving pressure

Abstract

The invention discloses an automatic pressure relief reinforced concrete inner-layer well wall which is characterized in that an outer-layer well wall and an inner-layer well wall are sequentially arranged on the well wall of a shaft from outside to inside, a water guide steel pipe is arranged in the inner-layer well wall, and the water inlet end of the water guide steel pipe extends towards the outer-layer well wall and is communicated with underground water fluid; the drainage end of the water guide steel pipe extends towards the well bottom and penetrates out of the inner side face of the inner-layer well wall, and the water inlet end of the water guide steel pipe is connected with a water inlet control valve through a water collecting box and communicated with underground water fluid through the water inlet control valve. By arranging the water guide steel pipe, water is drained to the lower portion of a water-rich stratum, water flow is effectively guided out of a shaft, the water pressure borne by the inner-layer well wall is relieved, the inner-layer well wall is prevented from being fractured and fractured due to the fact that the water pressure external load is reduced, the inner-layer well wall can be designed to be thinner, the requirement for the material strength is lowered, and the service life of the inner-layer well wall is prolonged. And building materials are saved, and the construction cost is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of shaft construction, in particular to a reinforced concrete inner shaft wall with automatic pressure relief. Background Art

[0002] Freezing method is an important method in deep well construction of coal mines in western my country. The well wall constructed by freezing method is mostly a double-layer reinforced concrete structure, consisting of inner wall and outer wall. The outer wall mainly bears the freezing pressure and deadweight of the well wall during the well construction period, while the inner wall mainly bears the water pressure from the outer wall or interlayer. As the construction of coal mine shafts in my country develops to the west, the newly built mine shafts will pass through multiple aquifers, and the water head height can reach more than 600m. When designing the inner wall according to the "Design Code for Coal Mine Shafts and Chambers GB 50384-2007", the thickness of the inner wall increases sharply.

[0003] The inner wall of a traditional frozen shaft is designed to be impermeable to strictly prevent groundwater from leaking into the shaft. Therefore, the shaft wall structure needs to withstand all the water pressure deep in the shaft. In order to ensure the waterproof effect and resist the deep water pressure, the inner wall is often designed to be thicker and more complex. At present, the thickness of the inner wall of relevant coal mine shafts has reached 1.5-2m. The sharp increase in the thickness of the shaft wall has caused the shaft excavation radius to increase, the excavation area to increase exponentially, and the amount of concrete and frozen volume to increase significantly, which has increased the construction cost and construction difficulty of the shaft, and at the same time caused unnecessary waste of resources and increased construction costs. Summary of the invention

[0004] To this end, the technical problem to be solved by the present invention is to provide an automatically decompressed reinforced concrete inner well wall that can reduce the water pressure borne by the well wall, reduce the thickness of the inner well wall, and reduce the construction difficulty and construction cost.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: an automatically depressurized reinforced concrete inner well wall, an outer well wall and an inner well wall are arranged on the well wall of the well shaft in sequence from the outside to the inside, a water-conducting steel pipe is arranged in the inner well wall, the water inlet end of the water-conducting steel pipe extends toward the direction of the outer well wall and is communicated with the groundwater fluid, the drainage end of the water-conducting steel pipe extends toward the bottom of the well and passes through the inner side surface of the inner well wall, the water inlet end of the water-conducting steel pipe is connected to a water inlet control valve through a water collecting box, and the water inlet end of the water-conducting steel pipe is communicated with the groundwater fluid through the water inlet control valve.

[0006] The above-mentioned automatically depressurized reinforced concrete inner well wall has a pipe connection port on the water collecting box, one pipe connection port on the water collecting box is connected to the water conducting steel pipe, and at least one pipe connection port on the water collecting box is connected to the water inlet control valve.

[0007] The above-mentioned reinforced concrete inner layer well wall with automatic pressure relief, the water collecting box includes an outer shell, the shape of the outer shell is a cube, and the pipeline connection port is opened on each wall surface of the outer shell.

[0008] In the above-mentioned automatically depressurized reinforced concrete inner well wall, the number of the water inlet control valve is more than one, and each water control valve is respectively connected to the pipeline connection port at a different position on the outer shell.

[0009] The above-mentioned reinforced concrete inner well wall with automatic pressure relief has an internal thread on the inner wall of the pipeline connection port, and a sealing cover is sealed and fixedly connected inside the idle pipeline connection port.

[0010] In the above-mentioned automatically decompressed reinforced concrete inner well wall, an external thread is provided on the end of the water-conducting steel pipe, a pipe clamp is threadedly connected to the end of the water-conducting steel pipe, and the ends of two adjacent sections of the water-conducting steel pipe are threadedly connected through the pipe clamp.

[0011] In the above-mentioned automatically decompressed reinforced concrete inner well wall, the water-conducting steel pipe is arranged in the inner well wall along the axial direction of the wellbore.

[0012] The above-mentioned automatically decompressed reinforced concrete inner well wall, the water inlet control valve includes a compression spring, a sealing ball and a retaining ring, the retaining ring is fixedly installed in the water inlet pipe, the sealing ball is installed on the side of the retaining ring away from the groundwater, the sealing ball seals on the inner ring edge of the retaining ring, one end of the compression spring is fixedly connected to the wall of the water inlet pipe, and the other end of the compression spring is against the sealing ball; the drainage end of the water inlet pipe is fluidly connected with the water collecting box.

[0013] In the above-mentioned reinforced concrete inner well wall with automatic pressure relief, a water filter stone is installed in the water inlet end of the water inlet pipe.

[0014] In the above-mentioned automatically depressurized reinforced concrete inner well wall, a drainage box is connected to the drainage end of the water-conducting steel pipe, and the drainage box is embedded in the inner wall surface of the inner well wall.

[0015] The technical solution of the present invention achieves the following beneficial technical effects:

[0016] 1. By setting up water-conducting steel pipes, water-rich strata can be drained downward, and the water flow can be effectively conducted out of the wellbore, effectively reducing the water pressure that the inner well wall needs to bear, and avoiding cracks and ruptures in the inner well wall due to excessive water pressure. Due to the reduction of external water pressure load, the inner well wall can be designed to be thinner, which reduces the requirements for material strength, saves building materials, and reduces construction costs; multiple water-conducting steel pipes are arranged in the inner well wall, which increases the reinforcement ratio of the inner well wall, and cooperates with pipe clamps to achieve the connection of water-conducting steel pipes, thereby improving structural safety.

[0017] 2. By setting up a water inlet control valve, when the groundwater pressure is too high, the water inlet control valve can be automatically opened to discharge water, so that the well wall is always under pressure within a reasonable range, which is conducive to maintaining the stability of the well wall structure.

[0018] 3. By setting up a water collection box, the water inlet pipe can be extended in different spatial directions to achieve staggered distribution with the steel bars in the inner well wall. While expanding the drainage range, it will not interfere with the original steel cage. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic cross-sectional view of the water-conducting steel pipe of the present invention arranged in the inner well wall;

[0020] Figure 2 A schematic structural diagram of a water collecting box of the present invention;

[0021] Figure 3 A schematic diagram of the structure of the connection between multiple water inlet control valves and a water collecting box according to the present invention;

[0022] Figure 4 A schematic structural diagram of two adjacent water-conducting steel pipes of the present invention connected by a pipe hoop;

[0023] Figure 5 A schematic cross-sectional view of the water-conducting steel pipe of the present invention arranged in the inner well wall.

[0024] The reference numerals in the figure are as follows: 1-outer well wall; 2-inner well wall; 3-partition; 4-water-conducting steel pipe; 401-pipe clamp; 402-external thread; 5-drainage box; 6-water inlet control valve; 601-water inlet pipe; 602-retaining ring; 603-sealing ball; 604-compression spring; 605-water filter stone; 7-water collecting box; 701-housing; 702-pipeline connection port; 703-sealing cover. DETAILED DESCRIPTION

[0025] In this embodiment, a reinforced concrete inner well wall with automatic pressure relief is provided. Figure 1 As shown, an outer well wall 1 and an inner well wall 2 are sequentially arranged on the well wall of the well shaft from the outside to the inside, and a water-conducting steel pipe 4 is arranged in the inner well wall 2 along the axial direction of the well shaft, the water inlet end of the water-conducting steel pipe 4 extends toward the direction of the outer well wall 1 and is in communication with the groundwater fluid, the drainage end of the water-conducting steel pipe 4 extends toward the bottom of the well and passes through the inner side surface of the inner well wall 2, the water inlet end of the water-conducting steel pipe 4 is connected to a water inlet control valve 6 through a water collecting box 7, the water inlet end of the water-conducting steel pipe 4 is in communication with the groundwater fluid through the water inlet control valve 6, the drainage end of the water-conducting steel pipe 4 is connected to a drainage box 5, and the drainage box 5 is embedded in the inner wall surface of the inner well wall 2.

[0026] like Figure 2-3 As shown, the water collecting box 7 includes an outer shell 701, and the shape of the outer shell 701 is a cube. The pipeline connecting port 702 is opened on each wall surface of the outer shell 701, and the inner wall of the pipeline connecting port 702 is provided with an internal thread. A pipeline connecting port 702 on the water collecting box 7 is connected to the water guiding steel pipe 4, and the number of the water inlet control valves 6 is more than one, and each water control valve 6 is respectively connected to the pipeline connecting ports 702 at different positions on the outer shell 701. In actual use, the pipeline connecting ports 702 around the water collecting box 7 are connected with water inlet control valves 6 to form a claw-shaped structure, which is conducive to increasing the water discharge range, will not interfere with the existing steel cage, and also improves the structural strength. The idle pipeline connecting ports 702 that are not connected are sealed and fixedly connected with sealing covers 703.

[0027] like Figure 4 As shown, an external thread 402 is provided on the end of the water-conducting steel pipe 4, and a pipe clamp 401 is threadedly connected to the end of the water-conducting steel pipe 4. The ends of two adjacent sections of the water-conducting steel pipe 4 are threadedly connected through the pipe clamp 401 to achieve high-strength docking of the water-conducting steel pipe 4.

[0028] like Figure 3 As shown, the water inlet control valve 6 includes a compression spring 604, a sealing ball 603 and a retaining ring 602, the retaining ring 602 is fixedly installed in the water inlet pipe 601, the sealing ball 603 is installed on the side of the retaining ring 602 away from the groundwater, the sealing ball 603 is sealingly fitted on the inner ring edge of the retaining ring 602, one end of the compression spring 604 is fixedly connected to the pipe wall of the water inlet pipe 601, and the other end of the compression spring 604 is pressed against the sealing ball 603; the drainage end of the water inlet pipe 601 is fluidly connected with the water collecting box 7, and a water filter stone 605 is installed in the water inlet end of the water inlet pipe 601. When the groundwater pressure exceeds a certain pressure, the water pressure pushes the sealing ball 603 to squeeze the compression spring 604, thereby draining water.

[0029] During the actual construction process, multiple drainage devices can be set up in the well wall to achieve drainage of water-rich strata to the lower part. Through this self-decompression frozen reinforced concrete inner well wall, the water flow is effectively led out of the wellbore, thereby reducing the water pressure that the inner well wall needs to bear and avoiding cracks and ruptures caused by excessive water pressure on the inner well wall. Due to the reduction of water pressure external load, the well wall can be designed to be thinner, reducing the requirements for material strength, saving building materials, and reducing construction costs. Due to the arrangement of multiple steel pipes in the well wall, the reinforcement ratio of the inner well wall is increased, improving the structural safety.

[0030] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the claims of this patent application.

Claims

1. An automatically decompressed reinforced concrete inner well wall, wherein an outer well wall (1) and an inner well wall (2) are arranged on the well wall of the well from the outside to the inside, characterized in that: A water-conducting steel pipe (4) is arranged inside the inner well wall (2); the water inlet end of the water-conducting steel pipe (4) extends toward the outer well wall (1) and is in fluid communication with the groundwater; the water outlet end of the water-conducting steel pipe (4) extends toward the well bottom and passes through the inner side surface of the inner well wall (2); the water inlet end of the water-conducting steel pipe (4) is connected to a water inlet control valve (6) via a water collecting box (7); and the water inlet end of the water-conducting steel pipe (4) is in fluid communication with the groundwater via the water inlet control valve (6).

2. The reinforced concrete inner well wall with automatic pressure relief according to claim 1 is characterized in that: The water collecting box (7) is provided with a pipeline connection port (702), one pipeline connection port (702) on the water collecting box (7) is connected to the water conducting steel pipe (4), and at least one pipeline connection port (702) on the water collecting box (7) is connected to the water inlet control valve (6).

3. The reinforced concrete inner well wall with automatic pressure relief according to claim 2 is characterized in that: The water collecting box (7) comprises an outer shell (701), the outer shell (701) is in a cubic shape, and each wall surface of the outer shell (701) is provided with the pipeline connection port (702).

4. The reinforced concrete inner well wall with automatic pressure relief according to claim 3 is characterized in that: The number of the water inlet control valve (6) is more than one, and each water inlet control valve (6) is respectively connected to a pipeline connection port (702) at a different position on the housing (701).

5. The reinforced concrete inner well wall with automatic pressure relief according to claim 3 is characterized in that: An internal thread is provided on the inner wall of the pipeline connection port (702), and a sealing cover (703) is sealed and fixedly connected inside the idle pipeline connection port (702).

6. The reinforced concrete inner well wall with automatic pressure relief according to claim 1, characterized in that: The end of the water-conducting steel pipe (4) is provided with an external thread (402), the end of the water-conducting steel pipe (4) is threadedly connected with a pipe clamp (401), and the ends of two adjacent sections of the water-conducting steel pipe (4) are threadedly connected via the pipe clamp (401).

7. The reinforced concrete inner well wall with automatic pressure relief according to claim 6, characterized in that: The water-conducting steel pipe (4) is arranged inside the inner well wall (2) along the axial direction of the wellbore.

8. The reinforced concrete inner well wall with automatic pressure relief according to claim 1, characterized in that: The water inlet control valve (6) comprises a compression spring (604), a sealing ball (603) and a retaining ring (602); the retaining ring (602) is fixedly installed in the water inlet pipe (601); the sealing ball (603) is installed on the side of the retaining ring (602) facing away from the groundwater; the sealing ball (603) is sealingly fitted on the inner ring edge of the retaining ring (602); one end of the compression spring (604) is fixedly connected to the pipe wall of the water inlet pipe (601); the other end of the compression spring (604) abuts against the sealing ball (603); the drainage end of the water inlet pipe (601) is fluidly connected to the water collecting box (7).

9. The reinforced concrete inner well wall with automatic pressure relief according to claim 6, characterized in that: A water filter stone (605) is installed in the water inlet end of the water inlet pipe (601).

10. The reinforced concrete inner well wall with automatic pressure relief according to claim 1, characterized in that: A drainage box (5) is connected to the drainage end of the water-conducting steel pipe (4), and the drainage box (5) is embedded in the inner wall surface of the inner well wall (2).

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