Permanent basement anti-floating pressure relief system

Abstract

The permanent basement anti-floating pressure relief system comprises a first foundation pit, a water filtering pit formed in the bottom of the first foundation pit, a water collecting well arranged in the first foundation pit, a drainage device used for conveying water in the water filtering pit to the water collecting well and a drainage device installed in the water collecting well. The drainage device comprises a water filtering head arranged in the water filtering pit, a filtering vertical pipe connected to the upper portion of the water filtering head and a filtering transverse pipe communicating with the filtering vertical pipe and penetrating into the water collecting well. The water filtering pit is filled with a first filling material; and the first foundation pit is filled with a second filling material. The method has the effect that the problem that the basement structure is affected and damaged due to the fact that the water pressure of the plate bottom is too large after the plate bottom post-cast strip is closed is solved.

Description

Technical Field

[0001] This application relates to the field of drainage and pressure relief technology, and in particular to a permanent basement anti-buoyancy pressure relief system. Background Technology

[0002] Many buildings now have basements. However, in coastal areas, the water table is high, and it rises significantly during the rainy season. This rise in water table increases groundwater pressure, which can cause structural damage to basements, such as water seepage, wall cracks, or foundation settlement.

[0003] In existing technologies, anti-buoyancy measures for basements are generally implemented by setting temporary pressure relief holes at the post-cast strip of the basement to release groundwater pressure. This method can effectively reduce the impact of groundwater pressure on the basement structure during the construction of the main structure of the project.

[0004] Regarding the aforementioned technologies, the inventors believe that even after the main structure of the project is completed and the post-cast strip at the bottom of the slab is completely sealed, excessive groundwater pressure at the bottom of the slab can still affect and damage the basement structure. Utility Model Content

[0005] In order to improve the problem of the impact and damage to the basement structure caused by excessive water pressure at the bottom of the slab after the post-cast strip at the bottom of the slab is closed, this application provides a permanent basement anti-buoyancy pressure relief system.

[0006] The permanent basement anti-buoyancy and pressure relief system provided in this application adopts the following technical solution:

[0007] A permanent basement anti-buoyancy and pressure relief system includes a first foundation pit, a filter pit opened at the bottom of the first foundation pit, a collection well arranged in the first foundation pit, a diversion device for transporting water from the filter pit to the collection well, and a drainage device installed in the collection well; the diversion device includes a filter head arranged in the filter pit, a filter riser connected above the filter head, and a filter horizontal pipe connected to the filter riser and extending into the collection well; the filter pit is filled with a first filler material; the first foundation pit is filled with a second filler material.

[0008] By adopting the above technical solution, groundwater enters the first foundation pit and the filter pit through infiltration. When the groundwater level in the filter pit rises to a certain height, the groundwater will enter the filter riser from the filter head in the filter pit under pressure, and then enter the sump through the filter horizontal pipe. Finally, it will be discharged through the drainage device in the sump, thereby realizing the anti-buoyancy and pressure relief of the basement. This helps to improve the problem of the impact and damage to the basement structure caused by excessive water pressure at the bottom of the slab after the post-cast strip at the bottom of the slab is closed.

[0009] Optionally, the bottom of the first foundation pit is cast with a water collection cushion layer for arranging the water collection well; the well wall and bottom of the water collection well are both reinforced concrete structures, and one side of the well wall of the water collection well has an arrangement port for arranging the output end of the filter horizontal pipe; a brick membrane is provided on the outside of the well wall of the water collection well to isolate the second filler material.

[0010] By adopting the above technical solution, during the construction of the water collection well, a water collection cushion layer is first set at the bottom of the first foundation pit, then a brick formwork is built on the water collection cushion layer and the second filler is filled between the first foundation pit and the brick formwork. Finally, steel bars are tied inside the brick formwork and concrete is poured, thus completing the layout of the water collection well. The setting of the water collection cushion layer and the brick formwork helps workers to construct the water collection well and also helps to improve the structural stability of the water collection well.

[0011] Optionally, the water collection cushion layer has a double-layer structure, and from bottom to top, the water collection cushion layer includes a first water collection cushion layer for reinforcing the bottom of the first foundation pit and a second water collection cushion layer for supporting the arrangement of the water collection wells.

[0012] By adopting the above technical solution, a double-layer structure of the water collection cushion layer is disclosed. The setting of the first water collection cushion layer helps to improve the structural stability of the bottom of the first foundation pit, and the setting of the second water collection cushion layer further strengthens the bottom structure of the water collection well, thereby facilitating the construction of the brick formwork and the subsequent binding of the water collection well reinforcement and concrete pouring.

[0013] Optionally, the drainage device includes a suction pipe, an outlet pipe, and a submersible pump for driving the suction pipe to deliver water to the outlet pipe.

[0014] By adopting the above technical solution, the specific structure of the drainage device is disclosed. When groundwater enters the collection well, driven by the submersible pump, the groundwater will pass through the suction pipe, the submersible pump, and the outlet pipe in sequence and be discharged from the outlet pipe into the collection well. This ensures that the water level in the collection well is always lower than the horizontal height of the filter pipe, which helps to reduce the probability of backflow caused by excessively high water level in the collection well.

[0015] Optionally, a pressure monitoring gauge for monitoring the water pressure at the output end of the filter horizontal pipe is installed on one side of the water collection well, and a pressure relief valve is installed at the output end of the filter horizontal pipe.

[0016] By adopting the above technical solution, the installation of pressure monitoring gauges and pressure relief valves helps to monitor the pressure of groundwater in the filter horizontal pipe, and the flow rate of the diversion device can be adjusted by controlling the opening and closing of the pressure relief valves, thereby helping to mitigate the impact on the basement structure caused by excessive water pressure at the bottom of the slab.

[0017] Optionally, the filter head is embedded in the first filler and has multiple filter holes on its side wall; the filter holes are wrapped with filter material.

[0018] By adopting the above technical solution, multiple filter holes are opened on the outside of the filter head and wrapped with filter material, which helps to prevent particulate matter from entering the filter riser through the filter holes, thereby achieving the filtration of groundwater.

[0019] Optionally, the first filler is crushed stone with a particle size of 20-40 mm.

[0020] By adopting the above technical solution, crushed stone with a particle size of 20-40mm is used as the first filler. Since there are many and large gaps between the crushed stone, groundwater can easily flow into the filter pit.

[0021] Optionally, the diameter of the filter holes is not less than 1 cm, and the distance between each filter hole is not greater than 5 cm.

[0022] By adopting the above technical solution, the pore size of the filter holes is smaller than the particle size of the gravel, which helps to keep the gravel out of the filter head and prevents the gravel from entering the drainage device.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. A permanent basement anti-buoyancy and pressure relief system, comprising a first foundation pit, a filter pit opened at the bottom of the first foundation pit, a sump well arranged in the first foundation pit, a diversion device for transporting water in the filter pit to the sump well, and a drainage device installed in the sump well; by setting up the diversion device, groundwater enters the first foundation pit and the filter pit through infiltration. When the groundwater level in the filter pit rises to a certain height, under pressure, the groundwater will enter the filter riser from the filter head in the filter pit, then enter the sump well through the filter horizontal pipe, and finally be discharged through the drainage device in the sump well, thereby achieving anti-buoyancy and pressure relief of the basement, which helps to improve the problem of the impact and damage to the basement structure caused by excessive water pressure at the bottom of the slab after the post-cast strip at the bottom of the slab is closed;

[0025] 2. By installing a drainage device in the collection well, when groundwater enters the collection well, driven by a submersible pump, the groundwater will pass through the suction pipe, the submersible pump, and the outlet pipe in sequence, and be discharged from the collection well from the outlet pipe. This ensures that the water level in the collection well is always lower than the horizontal height of the filter pipe, which helps to reduce the probability of backflow caused by excessively high water level in the collection well.

[0026] 3. By setting up pressure monitoring gauges and pressure relief valves, it is helpful to monitor the pressure of groundwater in the filter horizontal pipe, and the water output of the diversion device can be adjusted by controlling the opening and closing of the pressure relief valves, thereby helping to mitigate the impact on the basement structure caused by excessive water pressure at the bottom of the slab. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the basement anti-buoyancy pressure relief system in this embodiment.

[0028] Figure 2 yes Figure 1 Enlarged schematic diagram of the filter head at point A.

[0029] Figure 3 yes Figure 1 Enlarged schematic diagram of the pressure monitoring gauge and pressure relief valve at point B.

[0030] Figure 4 yes Figure 1 Enlarged schematic diagram of the drainage device at point C.

[0031] Explanation of reference numerals in the attached drawings: 1. First foundation pit; 11. Water collection cushion layer; 111. First water collection cushion layer; 112. Second water collection cushion layer; 12. Brick formwork; 121. Arrangement hole; 13. Second filler material; 14. Base slab cushion layer; 2. Filter pit; 21. First filler material; 3. Water collection well; 31. Arrangement opening; 32. Water collection base slab; 34. Water collection inner wall; 4. Drainage device; 41. Filter head; 411. Filter hole; 412. Filter material; 42. Filter riser; 43. Filter horizontal pipe; 431. Pressure monitoring gauge; 432. Pressure relief valve; 5. Drainage device; 51. Suction pipe; 52. Submersible pump; 53. Outlet pipe; 55. Liquid level sensor; 6. Basement floor slab. Detailed Implementation

[0032] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0033] This application discloses a permanent basement anti-buoyancy and pressure relief system. (Refer to...) Figure 1 The basement anti-buoyancy and pressure relief system includes a first foundation pit 1, a filter pit 2 located at the bottom of the first foundation pit 1, a collection well 3 located within the first foundation pit 1, a diversion device 4 for transporting water from the filter pit 2 to the collection well 3, and a drainage device 5 installed within the collection well 3. In this embodiment, the slope coefficient of the first foundation pit 1 is no greater than 1:2, and the depth of the first foundation pit 1 is approximately 1.5m. The filter pit 2 is located 0.8m to 1m around the collection well 3, and its depth is 1m.

[0034] Reference Figure 1 and Figure 2The diversion device 4 includes a filter head 41 arranged in the filter pit 2, a filter riser 42 connected above the filter head 41, and a filter horizontal pipe 43 connected to the filter riser 42 and extending into the collection well 3. Both the filter riser 42 and the filter horizontal pipe 43 are made of galvanized steel pipe with a diameter of 100mm.

[0035] Reference Figure 1 and Figure 2 The filter pit 2 is filled with a first filler material 21. The first filler material 21 is made of crushed stone with a particle size of 20-40mm. The filter head 41 is buried in the first filler material 21. The side wall of the filter head 41 has multiple filter holes 411 with a diameter of not less than 1 cm and a spacing of not more than 5 cm between each filter hole 411. The outside of the filter head 41 is wrapped with filter material 412 to prevent sand and gravel from entering the diversion device 4. The lower end of the filter riser 42 is vertically inserted into the first filler material 21 and sleeved on the output end of the filter head 41. The filter riser 42 is vertically arranged in the first pit 1. When the groundwater level in the filter pit 2 rises to a certain height, the groundwater will pass through the filter material 412 under the action of groundwater pressure and enter the collection well 3 under the transportation of the diversion device 4. In this embodiment, the filter material 412 is a double-sided non-woven fabric material.

[0036] Reference Figure 3 A water collection cushion layer 11 is poured at the bottom of the first foundation pit 1. The water collection cushion layer 11, from bottom to top, includes a first water collection cushion layer 111 for reinforcing the bottom of the first foundation pit 1 and a second water collection cushion layer 112 for supporting the arrangement of water collection wells 3. The total thickness of the water collection cushion layer 11 is approximately 300 mm. A brick formwork 12 for arranging the water collection wells 3 is built on top of the water collection cushion layer 11. The top of the brick formwork 12 extends above the opening of the first foundation pit 1. The brick formwork 12 is provided with arrangement holes 121 for the horizontal filter pipes 43 to pass through.

[0037] Reference Figure 1 The first pit 1 is filled with a second filler material 13 around the brick formwork 12. The filling height of the second filler material 13 is lower than the upper end of the filter riser 42. The upper end of the filter riser 42 is connected to the input end of the filter horizontal pipe 43 and forms a 90-degree angle with the filter riser 42. In this embodiment, the second filler material 13 filling the top of the filter pit 2 is crushed stone with a particle size of 20-40mm, and the second filler material 13 filling the other three sides is fine sand.

[0038] Reference Figure 1 and Figure 3The water collection well 3 has a water collection base 32 and a water collection inner wall 34 set inside the brick formwork 12. The water collection base 32 and the water collection inner wall 34 are integrally set with the basement floor 6 and are all reinforced concrete structures. After the second filler 13 is used to backfill the first foundation pit 1, a base slab pad 14 is poured on top of the second filler 13, which is flush with the top of the brick formwork 12 and is used for the horizontal arrangement of the basement floor 6. The basement floor 6 and the base slab pad 14 help to reinforce the bottom structure of the basement. After the strength of the base slab pad 14 meets the requirements, the reinforcement construction of the basement floor 6 and the water collection inner wall 34 is carried out. The water collection inner wall 34 has a reserved arrangement port 31 for the output end of the filter horizontal pipe 43 to be arranged in the arrangement hole 121 of the brick formwork 12. In this embodiment, the base slab pad 14 is laid in two layers to facilitate the setting and installation of the filter horizontal pipe 43.

[0039] Reference Figure 1 and Figure 3 A pressure gauge 431 for monitoring the water pressure at the output end of the filter horizontal pipe 43 is installed outside the arrangement port 31 of the water collection well 3. A pressure relief valve 432 is also installed at the output end of the filter horizontal pipe 43. Due to the large amount of rainfall and rapid rise in water level during the flood season in coastal areas, the pressure gauge 431 can be used to monitor the groundwater pressure at all times, providing a basis for whether pressure relief is needed and the amount of pressure relief. When the value on the pressure gauge 431 is too high, the pressure relief valve 432 can be appropriately increased to increase the water output of the filter horizontal pipe 43; when the rainfall decreases after the flood season, the pressure relief valve 432 can be appropriately decreased or closed to reduce the water output of the filter horizontal pipe 43.

[0040] Reference Figure 1 and Figure 4 The drainage device 5 includes a suction pipe 51, a submersible pump 52, and an outlet pipe 53. The submersible pump 52 is installed on the inner wall 34 of the water collection system, and its installation height is lower than the output end of the filter horizontal pipe 43. The suction pipe 51 is installed at the suction end of the submersible pump 52, and the end of the suction pipe 51 contacts the bottom plate 32 of the water collection system. The outlet pipe 53 is installed at the outlet end of the submersible pump 52 and extends into the building's drainage pipe. In this embodiment, the drainage device 5 also includes a controller electrically connected to the submersible pump 52 and a level sensor 55 installed in the water collection well 3. The controller is electrically connected to the level sensor 55. The level sensor 55 is preset with a specified height. When the water level in the water collection well 3 rises to or above the specified height, the level sensor 55 sends a specified signal to the controller. The controller controls the submersible pump 52 to start. Driven by the submersible pump 52, the groundwater in the water collection well 3 is discharged from the water collection well 3 through the suction pipe 51 and the outlet pipe 53.

[0041] The implementation principle of a permanent basement anti-buoyancy and pressure relief system in this application embodiment is as follows: groundwater enters the first foundation pit 1 and the filter pit 2 through infiltration. When the groundwater level in the filter pit 2 rises to a certain height, the groundwater will enter the filter riser 42 from the filter head 41 in the filter pit 2 under the action of water pressure, and then enter the collection well 3 through the filter horizontal pipe 43. When the water level in the collection well 3 reaches a certain height, the submersible pump 52 located in the collection well 3 will automatically start and drive the suction pipe 51 to draw groundwater, and finally discharge it from the collection well 3 through the drainage pipe, thereby realizing the anti-buoyancy and pressure relief of the basement, which helps to improve the problem of the impact and damage to the basement structure caused by excessive water pressure at the bottom of the slab after the bottom of the slab is closed.

[0042] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A permanent basement anti-buoyancy pressure relief system, characterized in that, The system includes a first foundation pit (1), a filter pit (2) located at the bottom of the first foundation pit (1), a collection well (3) located in the first foundation pit (1), a diversion device (4) for transporting water from the filter pit (2) to the collection well (3), and a drainage device (5) installed in the collection well (3). The diversion device (4) includes a filter head (41) located in the filter pit (2), a filter riser (42) connected above the filter head (41), and a filter horizontal pipe (43) connected to the filter riser (42) and extending into the collection well (3). The filter pit (2) is filled with a first filler material (21), and the first foundation pit (1) is filled with a second filler material (13).

2. The permanent basement anti-buoyancy pressure relief system according to claim 1, characterized in that, The bottom of the first foundation pit (1) is filled with a water collection cushion layer (11) for the arrangement of the water collection well (3); the well wall and the bottom of the water collection well (3) are both reinforced concrete structures, and one side of the well wall of the water collection well (3) has an arrangement port (31) for the arrangement of the output end of the filter horizontal pipe (43); a brick membrane (12) for isolating the second filler (13) is provided on the outside of the well wall of the water collection well (3).

3. A permanent basement anti-buoyancy and pressure relief system according to claim 2, characterized in that, The water collection cushion layer (11) has a double-layer structure, and the water collection cushion layer (11) includes, from bottom to top, a first water collection cushion layer (111) for reinforcing the bottom of the first foundation pit (1) and a second water collection cushion layer (112) for supporting the arrangement of the water collection well (3).

4. A permanent basement anti-buoyancy and pressure relief system according to claim 1, characterized in that, The drainage device (5) includes a suction pipe (51), an outlet pipe (53), and a submersible pump (52) for driving the suction pipe (51) to deliver water to the outlet pipe (53).

5. A permanent basement anti-buoyancy and pressure relief system according to claim 1, characterized in that, The filter pipe (43) is provided with a pressure monitoring gauge (431) on one side of the water collection well (3) for monitoring the water pressure at the output end of the filter pipe (43), and a pressure relief valve (432) is installed at the output end of the filter pipe (43).

6. A permanent basement anti-buoyancy and pressure relief system according to claim 1, characterized in that, The filter head (41) is embedded in the first filler (21) and a plurality of filter holes (411) are provided on the side wall of the filter head (41); the filter holes (411) are wrapped with filter material (412).

7. A permanent basement anti-buoyancy pressure relief system according to claim 1, characterized in that, The first filler (21) is crushed stone with a particle size of 20-40 mm.

8. A permanent basement anti-buoyancy pressure relief system according to claim 6, characterized in that, The diameter of the filter hole (411) is not less than 1 cm, and the distance between each filter hole (411) is not greater than 5 cm.

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