A soft soil foundation drainage structure

Abstract

The utility model relates to the field of soft soil foundation treatment especially relates to a soft soil foundation drainage structure, including setting in the plastic drainage board of soft soil foundation, the upper end of plastic drainage board is located sand cushion layer, sand cushion layer is covered with sealing membrane, and the four peripheral edges of sealing membrane extend to sealing ditch, and the air filter pipe is laid in sand cushion layer, and the air filter pipe is connected with the vacuumizing equipment through vacuumizing pipe and sets up in the outside of sealing membrane, and the air distribution pipe is laid in sand cushion layer, and the air distribution pipe is connected with the high pressure gas supply equipment through the gas guide pipe and sets up in the outside of sealing membrane, the outside of plastic drainage board is equipped with the net cover, and the air distribution pipe is arranged on the net cover, and a plurality of air injection small holes are arranged on the outer wall of air distribution pipe, and the air distribution pipe is fixed with the net cover through the connecting piece, the utility model discloses the plastic drainage board is combined with the air pressure pipeline through the net cover form, and the integrated body of both has the air guide and drainage function, and the construction can be completed through the ordinary construction equipment, reduces the construction procedure, improves the construction efficiency.

Description

Technical Field

[0001] This utility model relates to the field of soft soil foundation treatment, and in particular to a drainage structure for soft soil foundation. Background Technology

[0002] To prevent settlement and other problems caused by water drainage after reinforcement of soft soil foundations, engineers use pneumatic fracturing to create groundwater drainage channels within the soil, facilitating more thorough drainage. However, current pneumatic fracturing vacuum preloading methods for reinforcing soft soil foundations not only require the installation of vertical plastic drainage boards within the soil but also the installation of vertical high-pressure gas delivery pipelines, making the construction process complex and inefficient. Utility Model Content

[0003] Based on the above problems, the purpose of this utility model is to provide a drainage structure for soft soil foundations. The technical solution adopted by this utility model is as follows:

[0004] This utility model provides a drainage structure for soft soil foundations, including a plastic drainage board installed in the soft soil foundation. The upper end of the plastic drainage board is located on a sand cushion layer, and a sealing membrane is covered on the outside of the sand cushion layer. The four edges of the sealing membrane extend into a sealing trench. An air filter pipe is laid in the sand cushion layer, and the air filter pipe is connected to a vacuum pumping device located outside the sealing membrane via a vacuum pumping pipe. An air distribution pipe is laid in the sand cushion layer, and the air distribution pipe is connected to a high-pressure air supply device located outside the sealing membrane via an air guide pipe. A mesh sleeve is fitted on the outside of the plastic drainage board, and an air delivery pipe is provided on the mesh sleeve. Several small air jet holes are provided on the outer wall of the air delivery pipe, and the air delivery pipe is fixed to the mesh sleeve by a connector.

[0005] Preferably, the connector is a cable tie.

[0006] Preferably, the end of the air delivery pipe is provided with a plug, the plug being located inside the air delivery pipe, and the end of the air delivery pipe is provided with a sealing tape.

[0007] Preferably, it includes a water-stopping curtain disposed in the soft soil foundation, the water-stopping curtain being located inside the sealing trench.

[0008] Preferably, the water-stop curtain is made of steel sheet piles.

[0009] Preferably, the plastic drainage board includes a core body and a filter sleeve fitted over the outside of the core body.

[0010] Preferably, the high-pressure gas supply equipment includes an air compressor and a gas storage tank; the vacuum pumping equipment includes a water storage tank and a vacuum pump.

[0011] Compared with the prior art, the beneficial technical effects of this utility model are as follows:

[0012] This invention combines a plastic drainage board with a pneumatic pipeline through a mesh cover. The integrated unit has both air guiding and drainage functions. Construction can be completed using ordinary construction equipment, reducing construction steps and improving construction efficiency. Attached Figure Description

[0013] The present invention will be further described below with reference to the accompanying drawings.

[0014] Figure 1 This is a schematic diagram of the drainage structure for soft soil foundation of this utility model;

[0015] Figure 2 This is an exploded structural diagram of the plastic drainage board and the air conveying pipe of this utility model;

[0016] Figure 3 This is a schematic diagram of the structure of the gas delivery pipe of this utility model, which is sealed by a plug.

[0017] Explanation of reference numerals in the attached drawings: 1. Soft soil foundation; 2. Plastic drainage board; 201. Board core; 202. Filter sleeve; 3. Sand cushion layer; 4. Sealing membrane; 5. Sealing trench; 6. Air filter pipe; 7. Vacuum pipe; 8. Vacuum equipment; 9. Air distribution pipe; 10. Air guide pipe; 11. High-pressure air supply equipment; 12. Mesh sleeve; 13. Air conveying pipe; 1301. Air jet orifice; 14. Connector; 15. Block; 16. Sealing tape; 17. Water-stop curtain. Detailed Implementation

[0018] To make the technical problems, technical solutions and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0019] like Figures 1 to 3 As shown, this embodiment discloses a drainage structure for soft soil foundation, including a plastic drainage board 2 installed in the soft soil foundation 1. The upper end of the plastic drainage board 2 is located in the sand cushion layer 3. The sand cushion layer 3 is covered with a sealing membrane 4. The four edges of the sealing membrane 4 extend into the sealing trench 5. An air filter pipe 6 is laid in the sand cushion layer 3. The air filter pipe 6 is connected to a vacuum pumping device 8 installed outside the sealing membrane 4 through a vacuum pumping pipe 7. An air distribution pipe 9 is also laid in the sand cushion layer 3. The air distribution pipe 9 is connected to a high-pressure air supply device 11 installed outside the sealing membrane 4 through an air guide pipe 10.

[0020] The plastic drainage board 2 includes a core body 201 and a filter sleeve 202 fitted over the core body 201. The plastic drainage board 2 is a porous pipe strip specifically designed for drainage in foundation reinforcement. Its interior is an extruded plastic core board, serving as a robust framework and channel for the drainage strip, with a cross-shaped cross section. To enhance filtration performance, its exterior is wrapped with non-woven geotextile to form a filter layer. The core body 201 not only provides support but also allows water seeping into the filter layer to drain upwards.

[0021] A mesh sleeve 12 is fitted on the outer side of the plastic drainage board 2. An air delivery pipe 13 is provided on the mesh sleeve 12. Several air jet holes 1301 are provided on the outer wall of the air delivery pipe 13. The air delivery pipe 13 is fixed to the mesh sleeve 12 by a connector 14.

[0022] In this embodiment, the connector 14 is a cable tie. A plug 15 is provided at the end of the air delivery pipe 13, and the plug 15 is located inside the air delivery pipe 13. A sealing tape 16 is provided at the end of the air delivery pipe 13. The sealing tape 16 binds the air delivery pipe 13 and thus fixes the plug 15 in the air delivery pipe 13.

[0023] In this embodiment, a water-stop curtain 17 is installed in the soft soil foundation 1, surrounding the soft soil foundation to be drained, and located inside the sealing trench 5. The water-stop curtain 17 can be a steel sheet pile.

[0024] In this embodiment, the high-pressure air supply device 11 includes an air compressor and an air storage tank; both the air compressor and the air delivery pipe 10 are connected to the air storage tank, and a control valve and a pressure gauge are installed on the air delivery pipe 10. The vacuum pumping device 8 includes a water storage tank and a vacuum pump; both the vacuum pump and the vacuum pumping pipe are connected to the water storage tank. Controlling the vacuum pump allows for vacuuming of the water storage tank, thereby drawing water from the sand cushion layer 3 into the water storage tank through negative pressure. The high-pressure air supply device 11 and the vacuum pumping device 8 are commonly used devices for vacuum preloading to treat soft soil foundation drainage; their detailed structures will not be described in detail.

[0025] The working principle of this invention is as follows: Based on the conventional vacuum pre-compression method, a pneumatic fracturing system is added. The installation method and equipment for the air-conducting plastic drainage board used for soft soil reinforcement are the same as those for ordinary plastic drainage boards. After the plastic drainage board 2 and the air delivery pipe 13 are installed, the air delivery pipe 13 is connected to the high-pressure air supply equipment 11.

[0026] In this invention, the plastic drainage board 2 and the air conveying pipe 13 are combined and installed in the same way as ordinary plastic drainage boards, without the need to change the drainage board installation machinery.

[0027] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A drainage structure for soft soil foundation, comprising a plastic drainage board (2) disposed in a soft soil foundation (1), the upper end of the plastic drainage board (2) being located in a sand cushion layer (3), the sand cushion layer (3) being covered with a sealing membrane (4), the periphery of the sealing membrane (4) extending into a sealing trench (5), an air filter pipe (6) being laid in the sand cushion layer (3), the air filter pipe (6) being connected to a vacuum device (8) disposed outside the sealing membrane (4) via a vacuum pipe (7), characterized in that: An air distribution pipe (9) is laid in the sand cushion layer (3), and the air distribution pipe (9) is connected to a high-pressure air supply device (11) located outside the sealing membrane (4) through an air guide pipe (10). The plastic drainage board (2) is fitted with a mesh sleeve (12) on the outside. The mesh sleeve (12) is provided with a conveying air pipe (13). The outer wall of the conveying air pipe (13) is provided with a number of air jet holes (1301). The conveying air pipe (13) is fixed to the mesh sleeve (12) by a connector (14).

2. The drainage structure for soft soil foundation according to claim 1, characterized in that: The connector (14) is a cable tie.

3. The soft soil foundation drainage structure according to claim 1, characterized in that: The end of the air delivery pipe (13) is provided with a plug (15), the plug (15) is located inside the air delivery pipe (13), and the end of the air delivery pipe (13) is provided with a sealing strip (16).

4. The soft soil foundation drainage structure according to claim 1, characterized in that: Includes a water-stopping curtain (17) installed in the soft soil foundation (1), the water-stopping curtain (17) being located inside the sealing trench (5).

5. The soft soil foundation drainage structure according to claim 4, characterized in that: The water-stop curtain (17) is made of steel sheet piles.

6. The drainage structure for soft soil foundation according to claim 1, characterized in that: The plastic drainage board (2) includes a core body (201) and a filter sleeve (202) sleeved on the outside of the core body (201).

7. The drainage structure for soft soil foundation according to claim 1, characterized in that: The high-pressure gas supply equipment (11) includes an air compressor and a gas storage tank; the vacuum equipment (8) includes a water storage tank and a vacuum pump.

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