A foundation pit support structure

Abstract

The application discloses a foundation pit supporting structure, and relates to the technical field of building construction, which comprises a supporting device, a water pumping device and a drainage device. The supporting device comprises a base, a retaining wall, a plurality of supporting members and a plurality of positioning members. A plurality of cavities are formed in the retaining wall. The positioning members are arranged in the cavities. The water pumping device comprises a water pumping pump, a plurality of water pumping pipes and a plurality of water conveying pipes. The water pumping pump is arranged on the base. One ends of the water pumping pipes and the water conveying pipes are connected with the water pumping pump and communicate with each other. The other end of the water pumping pipe is located on the side of the base away from the retaining wall. The other end of the water conveying pipe is connected with the retaining wall and communicates with the cavities. The drainage device is arranged on one side of the retaining wall. The drainage device has a water storage tank in the inside, and the cavities communicate with the water storage tank. The application can effectively reduce water infiltration in rainy weather, so as to effectively ensure the structural stability of the foundation pit in rainy weather.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of building construction, and in particular to a foundation pit support structure. BACKGROUND

[0002] Foundation pit support is a key technology in building engineering, mainly used to ensure the stability of soil and work safety during deep foundation pit construction. This technology effectively controls the deformation displacement of the soil around the foundation pit and prevents groundwater from seeping into the work area through a series of engineering means such as support structures.

[0003] The application range of foundation pit support covers multiple fields of underground space development, including but not limited to high-rise building basements, underground parking lots, subway stations, and comprehensive pipe galleries, etc.

[0004] In actual engineering, foundation pit support needs to take appropriate support schemes according to geological conditions, excavation depth, and surrounding environment, etc. to ensure construction safety and the stability of surrounding buildings.

[0005] At present, after the foundation pit excavation is completed and the foundation pit support structure construction is completed, the subsequent building construction is carried out by the construction personnel inside the foundation pit. However, when the construction process coincides with the rainy season, the building construction often has to be suspended for safety and quality considerations; at this time, rainwater will accumulate inside the foundation pit and the water on the ground around the foundation pit will also have a tendency to flow towards the foundation pit, affecting the structural stability of the foundation pit due to water infiltration.

[0006] Therefore, there is an urgent need for a foundation pit support structure that can effectively ensure the structural stability of the foundation pit in rainy weather. SUMMARY

[0007] The present application provides a foundation pit support structure that can effectively reduce water infiltration during rainy weather, thereby effectively ensuring the structural stability of the foundation pit in rainy weather.

[0008] The present application provides a foundation pit support structure, which adopts the following technical solution:

[0009] A foundation pit support structure, comprising a support device, a water pumping device, and a drainage device;

[0010] The supporting device comprises a base, a retaining wall, a plurality of supporting members and a plurality of positioning members; the base and the retaining wall are arranged perpendicularly to each other, the base is in abutment with a bottom wall of the foundation pit, and the retaining wall is in abutment with a groove wall of the foundation pit; two ends of each of the supporting members are connected with the base and the retaining wall respectively; a plurality of cavities are formed in the retaining wall and extend through the retaining wall in the vertical direction; a plurality of the positioning members correspond to a plurality of the cavities one by one, the positioning members are arranged through the cavities, the top of each of the positioning members is located in the cavity, and the bottom of each of the positioning members is located in the soil below the foundation pit;

[0011] The water pumping device comprises a water pump, a plurality of water pumping pipes and a plurality of water conveying pipes, and a plurality of the water conveying pipes correspond to a plurality of the cavities one by one; the water pump is arranged above the base; one end of each of the water pumping pipes and the water conveying pipes is connected with the water pump and communicates with the water pump, the other end of each of the water pumping pipes is located on the side of the base away from the retaining wall, and the other end of each of the water conveying pipes is connected with the retaining wall and communicates with the space above the corresponding positioning member in the corresponding cavity;

[0012] The water draining device is arranged on the ground around the foundation pit as a whole, is located on one side of the top of the retaining wall and is connected with the retaining wall; the water draining device has a water storage tank with an opening upward in the interior, and the top of each of the cavities communicates with the water storage tank.

[0013] By using the above technical scheme, when it rains, the rainwater gathered in the interior of the foundation pit can first enter the cavities through the water pumping device, so that the weight of the supporting device is increased, and the positioning effect of the positioning members is more stable after being affected by the gravity of the water, thereby effectively ensuring the supporting effect of the supporting device on the foundation pit in rainy weather; then, when the water in the cavities exceeds a certain amount, the water will be stored in the water storage tank, which can effectively reduce the probability of rainwater penetrating into the soil below the foundation pit; at the same time, the accumulated water on the ground around the foundation pit can be blocked by the water draining device, and the water storage tank can directly collect the rainwater originally falling on the ground around the foundation pit, thereby improving the position stability of the top of the retaining wall and reducing the influence of the accumulated water on the ground penetrating into the soil on the soil around the foundation pit; thereby the water penetration can be effectively reduced in rainy weather, and the structural stability of the foundation pit in rainy weather can be effectively ensured.

[0014] Optionally, the water draining device comprises a bottom plate, a fixed plate, a movable plate and two telescopic members;

[0015] The bottom plate is arranged on one side of the retaining wall and contacts the ground around the foundation pit; the fixed plate is arranged above one end of the bottom plate close to the retaining wall, the movable plate is movably arranged on the bottom plate and located on the side of the fixed plate away from the retaining wall; the two ends of the telescopic member are connected with the fixed plate and the movable plate respectively, and the telescopic member has a tendency to drive the movable plate to move towards the fixed plate.

[0016] The fixed plate, the movable plate and the two telescopic members jointly enclose the water storage tank above the bottom plate, and the movable plate moves away from the fixed plate as the water in the water storage tank increases.

[0017] By using the above technical scheme, when the water collected in the water storage tank exceeds a certain amount, the movable plate can be driven to move away from the fixed plate, so that the water storage capacity of the water storage tank can be increased according to the increase of rainfall, so that the water storage tank can meet the demand of the water pumping device to pump more rainwater from the foundation pit, and the influence of the seepage of the accumulated water on the ground around the foundation pit can be further reduced.

[0018] Optionally, the drainage device further comprises a flow pushing member.

[0019] The flow pushing member is movably arranged on the bottom plate and located on the side of the movable plate away from the fixed plate, one end of the flow pushing member contacts the movable plate to move with the movable plate, and the end of the flow pushing member away from the movable plate has a flow pushing part close to the ground.

[0020] By using the above technical scheme, during the movement of the flow pushing member away from the fixed plate along with the movable plate, the flow pushing part can push the accumulated water on the ground on one side of the bottom plate to flow away from the bottom plate, thereby further reducing the influence of the seepage of the accumulated water on the soil around the foundation pit.

[0021] Optionally, the drainage device further comprises a drainage valve, and a drainage opening for water discharge is formed in the movable plate.

[0022] The drainage valve is rotatably arranged on the movable plate, the rotation axis of the drainage valve is located at the top of the drainage valve and is perpendicular to the movement direction of the movable plate, and the rotation of the drainage valve is used to control the opening and closing of the drainage opening.

[0023] The end of the flow pushing member close to the movable plate has a limiting part; during the movement of the movable plate on the bottom plate, the drainage valve is limited by the limiting part to keep the drainage opening closed; when the movable plate moves away from the fixed plate to the limit position, the limiting part contacts the drainage valve, and the drainage valve is rotated by the water force to open the drainage opening.

[0024] By adopting the technical scheme, when the water storage capacity of the water storage tank reaches the maximum, the drain valve can be rotated under the action of water to open the drain port, so that the water in the water storage tank is discharged along the top surface of the push flow piece in a direction away from the retaining wall through the drain port, the subsequent water pumping device can continue to complete the water pumping work, and the influence of the discharged water on the stability of the foundation pit structure is reduced.

[0025] Optionally, the push flow piece has a flow guide part on each side thereof, for guiding the discharged water to flow in a direction away from the movable plate.

[0026] By adopting the technical scheme, the flow guide part can improve the stability and reliability of the process of discharging water in a direction away from the retaining wall, so as to further reduce the influence of the discharged water on the stability of the foundation pit structure.

[0027] Optionally, the top of the bottom plate has an inclined guide surface inclined downward in a direction away from the retaining wall, and the movement direction of the movable plate is parallel to the inclination direction of the guide surface.

[0028] By adopting the technical scheme, the movable part can be conveniently moved in a direction away from the fixed plate under the action of water in the water storage tank, and the action force of the water in the water storage tank on the retaining wall can be reduced, so as to further ensure the position stability of the retaining wall.

[0029] Optionally, the water drainage device comprises a plurality of floating parts with a density smaller than that of water, and the plurality of floating parts correspond to the plurality of cavities one by one.

[0030] The floating part is arranged in the cavity and located above the corresponding positioning part, and moves in a vertical direction along with the liquid level in the cavity, and is kept in the cavity during the movement.

[0031] The floating part is arranged in the cavity and located above the corresponding positioning part, and moves in a vertical direction along with the liquid level in the cavity, and is kept in the cavity during the movement.

[0032] By adopting the technical scheme, the probability of a large amount of impurities accumulating in the cavity due to the direct opening of the top of the cavity can be reduced, the cleanliness of the cavity is ensured, and the water in the cavity can be stably and reliably collected into the water storage tank when the amount of water in the cavity exceeds a certain amount.

[0033] Optionally, the floating part is provided with a filter screen with elasticity on the periphery thereof.

[0034] During the movement of the floating part, the side of the filter screen away from the floating part keeps in contact with the inner wall of the cavity.

[0035] Through the above technical scheme, the filter screen can clean the inner wall of the cavity during the movement of the floating member, and can effectively intercept impurities from entering the space between the floating member and the positioning member, thereby further ensuring the cleanliness of the cavity.

[0036] Optionally, the water delivery pipe is communicated with the top of the cavity, and the floating member remains below the position where the water delivery pipe is communicated with the cavity during the movement of the floating member.

[0037] Through the above technical scheme, the filter screen can fully filter the rainwater drawn into the cavity by the water pumping device, and the filter screen can send the impurities intercepted by it out of the cavity when it moves upward with the floating member, thereby facilitating subsequent cleaning.

[0038] Optionally, the top of the retaining wall is provided with a plurality of anti-falling rings near the positions of the top openings of the plurality of cavities.

[0039] When the floating member moves in the cavity, the filter screen is flared towards the direction close to the anti-falling ring; when the floating member moves upward to the limit position, the filter screen is in contact with the anti-falling ring, causing the filter screen to bend and deform, and the filter screen is flared towards the direction close to the positioning member.

[0040] Through the above technical scheme, the filter screen can effectively intercept and collect impurities during the movement of the floating member in the cavity; when the filter screen moves upward to the limit position with the floating member, the deformed filter screen can facilitate the impurities intercepted thereby to slide off along the surface thereof under the action of its own gravity and the washing of the rainwater drawn out by the water pumping device.

[0041] In summary, the present application has at least one of the following beneficial effects:

[0042] 1. It can effectively reduce the penetration of water into the soil below and around the foundation pit during rainy weather, thereby effectively ensuring the structural stability of the foundation pit in rainy weather;

[0043] 2. The water stored in the cavity can improve the positioning effect of the positioning member and the supporting effect of the supporting device, and the water stored in the water storage tank can improve the positional stability of the retaining wall, thereby improving the supporting effect of the supporting structure on the foundation pit;

[0044] 3. It can reduce the probability that the effect of the water in the cavity flowing into the water storage tank is affected by the accumulation of impurities entering the cavity, thereby improving the reliability of the water pumping device in extracting rainwater from the foundation pit;

[0045] 4. It can increase the water storage capacity of the water storage tank according to demand to meet more water storage needs, and can effectively discharge water away from the foundation pit when the water storage is excessive. BRIEF DESCRIPTION OF DRAWINGS

[0046] Figure 1 is a structural schematic view of a foundation pit supporting structure in a supporting effect on a foundation pit according to an embodiment of the present application;

[0047] Figure 2 is a structural schematic view of a foundation pit supporting structure according to an embodiment of the present application;

[0048] Figure 3 is a sectional view of a foundation pit supporting structure in non-rainy weather according to an embodiment of the present application;

[0049] Figure 4 is Figure 3 is an enlarged view of A in FIG. 4;

[0050] Figure 5 is a sectional view of a foundation pit supporting structure in rainy weather according to an embodiment of the present application;

[0051] Figure 6 is Figure 5 is an enlarged view of B in FIG. 5.

[0052] Legend: 1, foundation pit; 2, supporting device; 21, base; 22, retaining wall; 221, cavity; 222, anti-coming-off ring; 23, supporting piece; 24, positioning piece; 3, water pumping device; 31, water pumping pump; 32, water pumping pipe; 33, water conveying pipe; 4, drainage device; 41, bottom plate; 411, guide surface; 42, fixed plate; 43, movable plate; 431, drainage opening; 44, telescopic piece; 441, groove; 45, flow pushing piece; 451, flow pushing part; 452, limiting part; 453, flow guiding part; 46, drainage valve; 47, floating piece; 471, flow guiding hole; 48, filter screen; 5, water storage tank. DETAILED DESCRIPTION

[0053] The following will be described in detail with reference to the accompanying drawings. Figures 1-6 The present application will be described in further detail.

[0054] The present application discloses a foundation pit supporting structure, which is used for effectively reducing rainwater from penetrating into the soil below and around the foundation pit in rainy weather, thereby effectively improving the structural stability of the foundation pit.

[0055] With reference to Figure 1 and Figure 2 , the foundation pit supporting structure comprises a supporting device 2, a water pumping device 3 and a drainage device 4. The supporting device 2 is used for supporting the foundation pit 1; the water pumping device 3 is used for pumping the rainwater in the foundation pit 1 out of the foundation pit 1; and the drainage device 4 is used for collecting the water pumped out of the foundation pit 1 and discharging the water outwards.

[0056] With reference to Figure 2 and Figure 3The supporting device 2 comprises a base 21, a retaining wall 22, a plurality of supporting members 23 and a plurality of positioning members 24.

[0057] The base 21 and the retaining wall 22 are both in the shape of a rectangular plate, and the retaining wall 22 is installed vertically along the width direction, with one side of the thickness direction abutting against the sidewall of the foundation pit 1 and the bottom abutting against the bottom wall of the foundation pit 1; one side of the width direction of the base 21 is fixedly connected with the bottom of the retaining wall 22, the width direction is perpendicular to the width direction of the retaining wall 22, and the bottom abuts against the bottom wall of the foundation pit 1. In this embodiment, the fixed connection between the base 21 and the retaining wall 22 is preferably achieved by welding.

[0058] The supporting member 23 is in the shape of a rod, which is located between the base 21 and the retaining wall 22, and the two ends of the length direction are fixedly connected with the base 21 and the retaining wall 22 respectively; the supporting member 23 plays a role of inclined support between the base 21 and the retaining wall 22, the length direction of the supporting member 23 is perpendicular to the length direction of the base 21, and the plurality of supporting members 23 are distributed at equal intervals along the length direction of the base 21 relative to the base 21. In this embodiment, the fixed connection between the supporting member 23 and the base 21 and the retaining wall 22 is preferably achieved by welding; and the inclination angle of the supporting member 23 is preferably 45°.

[0059] The positioning member 24 is in the shape of a cylinder, and one end of the axial direction has a pointed structure for inserting into the soil. The retaining wall 22 is provided with a plurality of cavities 221 penetrating along the width direction of the retaining wall 22, and the plurality of cavities 221 correspond to the plurality of positioning members 24 one by one, and the positioning member 24 is matched with the cavity 221, that is, the shape of the cavity 221 is a cylinder and the radial dimension of the positioning member 24 is equal to the radial dimension of the cavity 221.

[0060] After the retaining wall 22 is installed and positioned in the foundation pit 1, the positioning member 24 is inserted into the cavity 221 along the vertical direction for installation; the retaining wall 22 limits the position of the downward insertion of the positioning member 24, and when the positioning member 24 is inserted downward along the cavity 221 to the limit position, the top of the positioning member 24 is located in the cavity 221 and the bottom is inserted into the soil below the foundation pit 1, so as to improve the position stability of the supporting device 2 relative to the foundation pit 1.

[0061] After the construction of the supporting device 2 is completed, the top of the retaining wall 22 extends out of the foundation pit 1 and is located above the foundation pit 1; the water pumping device 3 is installed on one side of the retaining wall 22 close to the base 21, and is used for pumping the rainwater in the foundation pit 1 into the plurality of cavities 221.

[0062] The water pumping device 3 comprises a water pumping pump 31, a plurality of water pumping pipes 32 and a plurality of water conveying pipes 33.

[0063] The water pump 31 is fixedly installed on the top of the base 21; one end of the water suction pipe 32 is connected with the water pump 31 in communication, and the other end of the water suction pipe 32 is located on the side of the base 21 away from the retaining wall 22 and is in communication with the space on one side of the base 21; a plurality of water delivery pipes 33 correspond to a plurality of cavities 221 one by one, one end of the water delivery pipe 33 is connected with the water pump 31 in communication, and the other end of the water delivery pipe 33 is fixedly connected with the top of the retaining wall 22 and is in communication with the top of the corresponding cavity 221. In this embodiment, the water suction pipe 32 is preferably installed inside the base 21, and the end thereof away from the water pump 31 extends to the side of the base 21 away from the retaining wall 22 along the width direction of the base 21 and is exposed, and the end thereof close to the bottom wall of the foundation pit 1 is convenient for the rainwater in the foundation pit 1 to flow in; and the water outlet direction of the end of the water delivery pipe 33 away from the water pump 31 is vertically downward along the width direction of the retaining wall 22, and the water delivery pipe 33 is aligned with the corresponding cavity 221 along the axis of the cavity 221.

[0064] When it rains, the water pump 31 is started to drive the rainwater in the foundation pit 1 to flow into the plurality of cavities 221 through the plurality of water suction pipes 32 and the plurality of water delivery pipes 33 respectively, and the rainwater flowing into the cavity 221 is stored in the space above the positioning member 24 in the cavity 221; at this time, the rainwater stored in the cavity 221 can increase the weight of the whole supporting device 2 to improve the positional stability of the supporting device 2 relative to the foundation pit 1, and can also exert a downward force above the positioning member 24 to ensure the reliability of the positioning effect of the positioning member 24.

[0065] Referring to Figure 1 and Figure 3 , the whole drainage device 4 is constructed on the ground around the foundation pit 1, and the whole drainage device 4 is located on the side of the top of the retaining wall 22 away from the foundation pit 1; due to the rain, the rainwater on the ground around the foundation pit 1 has a tendency to flow towards the foundation pit 1, and the position of the drainage device 4 can effectively block the rainwater on the ground around the foundation pit 1 flowing towards the foundation pit 1, thereby effectively reducing the influence of the rainwater on the soil around the foundation pit 1.

[0066] Referring to Figure 4 and Figure 5 , the drainage device 4 comprises a bottom plate 41, a fixed plate 42, a movable plate 43, an extension member 44, a flow pushing member 45 and a drainage valve 46.

[0067] Referring to Figure 4 and Figure 6 , the bottom plate 41 is in the shape of a rectangular plate structure as a whole, one side of the width direction thereof is fixedly connected with the retaining wall 22 and the length direction thereof is parallel to the length direction of the retaining wall 22, and the bottom thereof abuts against the ground around the foundation pit 1. In this embodiment, the fixed connection between the bottom plate 41 and the retaining wall 22 is preferably achieved by welding.

[0068] The fixed plate 42 is in the shape of a rectangular plate as a whole, is fixedly installed above the bottom plate 41 and at a position close to the retaining wall 22 of the bottom plate 41, and one side in the thickness direction of the fixed plate 42 abuts against one side in the thickness direction of the retaining wall 22. In this embodiment, the top of the fixed plate 42 is preferably lower than the top of the retaining wall 22, and the fixed plate 42 and the bottom plate 41 are preferably fixedly connected by welding.

[0069] The movable plate 43 is in the shape of a rectangular plate as a whole, is installed on the top of the bottom plate 41, and one side in the width direction of the movable plate 43 is movably connected to the bottom plate 41. The top of the bottom plate 41 has an inclined guide surface 411 that inclines downward away from the retaining wall 22. The movable direction of the movable plate 43 relative to the bottom plate 41 is the same as the inclination direction of the guide surface 411. The movable plate 43 and the fixed plate 42 are aligned along the movable direction of the movable plate 43, and the opposite end surfaces of the movable plate 43 and the fixed plate 42 are both perpendicular to the guide surface 411 and remain parallel to each other during the movement of the movable plate 43.

[0070] The telescopic member 44 is installed above the bottom plate 41 and between the fixed plate 42 and the movable plate 43. The telescopic member 44 is fixedly connected to the fixed plate 42 and the movable plate 43 at both ends in the length direction of the telescopic member 44, and the length direction of the telescopic member 44 is parallel to the movable direction of the movable plate 43. The telescopic member 44 can be deformed by telescoping in the length direction of the telescopic member 44, and has a tendency to drive the movable plate 43 to move to the limit position close to the fixed plate 42 and remain there. The telescopic member 44 has an upwardly open groove 441, and the opening of the groove 441 is perpendicular to the length direction of the telescopic member 44. The fixed plate 42, the movable plate 43, and the telescopic member 44 together form a water storage tank 5 for storing water. In this embodiment, the telescopic member 44 is preferably in a corrugated structure, has a certain elastic deformation capacity and a self-elastic recovery capacity. The fixed connection and sealing treatment between the telescopic member 44 and the fixed plate 42 and the movable plate 43 are preferably achieved by the cooperation of multiple bolts and sealing strips. Since the above-mentioned fixed connection and sealing treatment are common prior art, they will not be described here, and the multiple bolts and sealing strips are omitted in the drawings.

[0071] When there is no water or only a small amount of water in the water storage tank 5, the movable plate 43 will remain in the state of moving to the limit position close to the fixed plate 42 under the action of the telescopic member 44. When the amount of water stored in the water storage tank 5 exceeds a certain amount, the water in the water storage tank 5 will exert a force on the movable plate 43 to drive it to move away from the fixed plate 42. At this time, the capacity of the water storage tank 5 will increase to store more water. When the movable plate 43 moves to the limit position away from the fixed plate 42, the water storage capacity of the water storage tank 5 is the largest.

[0072] The push flow piece 45 is in the shape of a rectangular plate, and is movably installed on the bottom plate 41 and located on the side of the movable plate 43 away from the fixed plate 42. One side of the push flow piece 45 in the width direction is in contact with the movable plate 43, and the length direction of the push flow piece 45 is parallel to the length direction of the bottom plate 41 during the movement of the push flow piece 45. In this embodiment, the two sides of the bottom plate 41 are preferably provided with structures (such as tension springs or compression springs) for enabling the push flow piece 45 to have a tendency to move towards the movable plate 43. Since the structures having the above function are common prior art, they will not be described here, and only a brief representation is shown in the drawings.

[0073] The push flow piece 45 has two movement paths relative to the bottom plate 41, and the position of the push flow piece 45 remains unchanged during the movement of the push flow piece 45 relative to the bottom plate 41. During the movement of the movable plate 43 away from the fixed plate 42, the push flow piece 45 will move relative to the bottom plate 41 in the same direction as the movement direction of the movable plate 43 under the pushing of the movable plate 43, and the bottom of the push flow piece 45 keeps in contact with the guide surface 411 during this process. When the movable plate 43 is about to reach the limit position, the push flow piece 45 will continue to move away from the fixed plate 42 together with the movable plate 43, and move towards the ground at the same time so that the push flow piece 45 as a whole is located on the side of the bottom plate 41 away from the retaining wall 22.

[0074] The end of the push flow piece 45 away from the movable plate 43 has a push flow part 451. During the movement of the push flow piece 45 away from the fixed plate 42 together with the movable plate 43 to the limit position, the push flow part 451 keeps above the ground on the side of the bottom plate 41 away from the retaining wall 22 and close to the ground. At this time, the push flow part 451 can push the rainwater on the ground on the side of the bottom plate 41 away from the retaining wall 22 in the direction away from the bottom plate 41 during the movement of the push flow piece 45, and drive the rainwater to flow in the direction away from the foundation pit 1, so as to effectively reduce the influence of the rainwater on the soil around the foundation pit 1.

[0075] The movable plate 43 is also provided with a drainage opening 431 for draining the water in the water storage tank 5 away from the retaining wall 22. The drainage valve 46 is in the shape of a rectangular plate, and one side of the drainage valve 46 in the width direction is rotatably connected to the movable plate 43, and the rotation axis is located at the top of the drainage valve 46 and parallel to the length direction of the drainage valve 46 and the length direction of the movable plate 43.

[0076] The rotation of the drain valve 46 relative to the movable plate 43 is limited. When the drain valve 46 is rotated to the limit position towards the drain port 431, the drain valve 46 blocks the drain port 431 with a certain sealing performance, at this time the water in the water storage tank 5 cannot be discharged through the drain port 431; when the drain valve 46 is rotated to the limit position away from the drain port 431, the drain valve 46 is located on the side of the movable plate 43 away from the fixed plate 42, and the width direction of the drain valve 46 is inclined downward away from the fixed plate 42, for the water in the water storage tank 5 to be discharged from the bottom of the drain port 431.

[0077] The end of the flow pushing piece 45 close to the movable plate 43 has a limiting part 452, during the movement of the flow pushing piece 45 and the movable plate 43 away from the fixed plate 42, the limiting part 452 is in contact with the bottom of the drain valve 46 on the side of the movable plate 43 away from the fixed plate 42, to limit the rotation of the drain valve 46 relative to the movable plate 43, so that the water storage tank 5 can effectively realize the water storage function during this process; when the movable plate 43 is moved to the limit position away from the fixed plate 42, at this time the rotation limiting of the limiting part 452 to the drain valve 46 is released, the drain valve 46 will be rotated relative to the movable plate 43 under the action of the water in the water storage tank 5 to open the drain port 431 to a certain extent, for the water in the water storage tank 5 to be discharged through the drain port 431 away from the retaining wall 22.

[0078] The two sides of the flow pushing piece 45 in the length direction have flow guiding parts 453 for guiding the flow of the discharged water, after the water in the water storage tank 5 is discharged through the drain port 431, it will flow along the surface of the top of the flow pushing piece 45, at this time the flow guiding parts 453 on both sides can effectively prevent the water from flowing out from both sides of the flow pushing piece 45 in the length direction, so as to ensure that the discharged water can flow to the ground as far away from the foundation pit 1 as possible.

[0079] Further, in order to improve the stability of the process that the water in the cavity 221 flows into the water storage tank 5, the drainage device 4 further comprises a plurality of floating pieces 47, and the plurality of floating pieces 47 correspond one-to-one to the plurality of cavities 221.

[0080] The floating piece 47 is a cylindrical structure as a whole, which is vertically installed in the corresponding cavity 221 with its axis direction, and its density is less than water; when the cavity 221 stores water, the floating piece 47 will float on the liquid surface and move up and down in the cavity 221 with the increase and decrease of the water storage amount in the cavity 221.

[0081] The floating piece 47 is fixedly installed with a filter screen 48 for filtering impurities in water, which has elasticity, the filter screen 48 is a certain curved ring structure as a whole, which is flared on the side towards the axis direction of the floating piece 47, and its axis coincides with the axis of the floating piece 47.

[0082] When the floating member 47 is installed in the cavity 221, the floating member 47 is located above the corresponding positioning member 24, the outer side of the filter screen 48 is in contact with the inner wall of the cavity 221, the axis of the floating member 47 tends to coincide with the axis of the cavity 221, and the filter screen 48 is flared in the direction away from the corresponding positioning member 24 at this time.

[0083] The inner part of the floating member 47 is provided with a flow guide hole 471 for water flow, one end of the flow guide hole 471 penetrates the bottom of the floating member 47 along the axis direction of the floating member 47 to form an opening, the other end of the flow guide hole 471 is divided into multiple branches along the radial direction of the floating member 47 to penetrate the top of the floating member 47 to form multiple openings, and both ends of the flow guide hole 471 are located above the filter screen 48.

[0084] The floating member 47 has a limit during the movement in the cavity 221, the top of the retaining wall 22 is provided with an anti-disengagement ring 222 for preventing the floating member 47 from moving out of the cavity 221 at the position close to the openings of the multiple cavities 221, and the anti-disengagement ring 222 is detachably connected with the retaining wall 22; the anti-disengagement ring 222 has a ring structure as a whole, and the axis of the anti-disengagement ring 222 coincides with the axis of the corresponding cavity 221. In this embodiment, the detachable connection between the anti-disengagement ring 222 and the retaining wall 22 is preferably achieved by multiple bolts; since the above-mentioned detachable connection is a common prior art, it will not be described here, and the expression thereof is omitted in the drawings.

[0085] When there is no water or only a small amount of water in the cavity 221, the floating member 47 will be in a state of moving downward to the limit position in the cavity 221, and at this time the floating member 47 is in contact with the top of the corresponding positioning member 24.

[0086] During the process of gradually increasing the amount of water stored in the cavity 221, the floating member 47 will move upward, and during this process the filter screen 48 will remain in the state of upward flaring; since during this process the water inlet pipe 33 inputs rainwater into the cavity 221 and then flows from the top of the cavity 221 to the bottom of the cavity 221 and passes through the filter screen 48, the filter screen 48 can effectively filter impurities in the water entering the cavity 221 during this process, and the filtered impurities will move with the floating member 47 towards the opening of the top of the cavity 221, facilitating subsequent cleaning.

[0087] During the process of increasing the amount of water in the cavity 221 to the point of overflowing, the floating member 47 will also move upward to the limit position, and during this process the outer side of the upwardly flared filter screen 48 will be in contact with the corresponding anti-disengagement ring 222, the anti-disengagement ring 222 limits the filter screen 48 to prevent the floating member 47 from disengaging; after the outer side of the filter screen 48 contacts the anti-disengagement ring 222, as the floating member 47 continues to move upward, the filter screen 48 will be bent and deformed downward under the limiting action of the anti-disengagement ring 222, and finally the filter screen 48 will be flared downward.

[0088] When the floating member 47 moves upward to the limit position, the water in the cavity 221 can flow out through the flow guide hole 471, and the outflowing water can be collected in the water storage tank 5, and at the same time, the outflowing water can wash the impurities on the filter screen 48, so that the impurities can flow into the water storage tank 5 together; and the water input by the water pumping device 3 can also wash the impurities on the filter screen 48 at this time, so as to effectively clean the filter screen 48.

[0089] The implementation principle of the foundation pit supporting structure in the embodiment of the present application is as follows:

[0090] When it rains, the rainwater in the foundation pit 1 can be pumped into the cavities 221 by the water pumping device 3 in time, and the water in the cavities 221 can exert a downward force on the positioning member 24 and the supporting device 2 as a whole, thereby effectively improving the positioning effect of the positioning member 24 and the position stability of the supporting device 2 relative to the foundation pit 1, to ensure the supporting effect of the supporting device 2 on the foundation pit 1;

[0091] As the water in the cavities 221 gradually increases, when the floating member 47 moves upward to the limit position along the liquid surface, the water in the cavities 221 can flow into the water storage tank 5 for collection through the flow guide hole 471, and in this process, the filter screen 48 will continue to filter the water entering the cavities 221, thereby effectively reducing the probability of failure of the water pumping device 3 caused by the blockage of the flow guide hole 471;

[0092] As the water storage capacity of the water storage tank 5 increases, the movable plate 43 will move away from the fixed plate 42 to increase the capacity of the water storage tank 5, and in this process, the flow pushing member 45 can drive the rainwater around the foundation pit 1 to flow away from the foundation pit 1, so as to reduce the influence of the rainwater infiltration on the soil around the foundation pit 1;

[0093] When the water storage capacity of the water storage tank 5 is about to exceed, the movable plate 43 moves away from the fixed plate 42 to the limit position, at which time the rotation restriction of the drain valve 46 by the limiting portion 452 of the flow pushing member 45 is removed, and the drain valve 46 will rotate to open the drain port 431 under the action of the water in the water storage tank 5, so as to drain the water in the water storage tank 5; after the water in the water storage tank 5 flows out, it will flow away from the retaining wall 22 under the guidance of the flow pushing member 45, which facilitates the water pumping device 3 to continue to pump the rainwater in the foundation pit 1, and also reduces the influence of the rainwater infiltration on the soil around the foundation pit 1.

[0094] The above are the preferred embodiments of the present application, which do not limit the protection scope of the present application, therefore: any equivalent changes made on the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A foundation pit support structure, characterized in that, Includes support device (2), pumping device (3) and drainage device (4); The support device (2) includes a base (21), a retaining wall (22), multiple support members (23) and multiple positioning members (24); the base (21) and the retaining wall (22) are arranged perpendicularly to each other, the base (21) is in contact with the bottom wall of the pit (1), and the retaining wall (22) is in contact with the trench wall of the pit (1); the two ends of the support member (23) are respectively connected to the base (21) and the retaining wall (22); multiple cavities (221) are opened on the retaining wall (22), and the cavities (221) penetrate the retaining wall (22) in the vertical direction; the multiple positioning members (24) correspond one-to-one with the multiple cavities (221), the positioning members (24) pass through the cavities (221), their tops are located in the cavities (221) and their bottoms are located in the soil below the pit (1); The pumping device (3) includes a pump (31), multiple pumping pipes (32) and multiple water delivery pipes (33), and the multiple water delivery pipes (33) correspond one-to-one with the multiple cavities (221); the pump (31) is located above the base (21); one end of each of the pumping pipes (32) and the water delivery pipes (33) is connected to the pump (31), the other end of the pumping pipe (32) is located on the side of the base (21) away from the retaining wall (22), and the other end of the water delivery pipe (33) is connected to the retaining wall (22) and communicates with the space above the corresponding positioning member (24) in the corresponding cavity (221); The drainage device (4) is installed on the ground around the foundation pit (1), and is located on one side of the top of the retaining wall (22) and connected to the retaining wall (22); the drainage device (4) has an upward-opening water storage tank (5) inside, and the top of the cavity (221) is connected to the water storage tank (5); The drainage device (4) includes a base plate (41), a fixed plate (42), a movable plate (43), and a telescopic component (44). The base plate (41) is disposed on one side of the retaining wall (22) and contacts and abuts against the ground around the pit (1); the fixed plate (42) is disposed above the end of the base plate (41) near the retaining wall (22); the movable plate (43) is movably disposed on the base plate (41) and located on the side of the fixed plate (42) away from the retaining wall (22); the two ends of the telescopic member (44) are respectively connected to the fixed plate (42) and the movable plate (43), and it has an upward-opening groove (441) and has a tendency to drive the movable plate (43) to move towards the fixed plate (42); The fixed plate (42), the movable plate (43) and the telescopic member (44) together enclose the water storage tank (5) above the base plate (41). The movable plate (43) moves away from the fixed plate (42) as the amount of water in the water storage tank (5) increases. The drainage device (4) also includes a flow propulsion element (45); The propulsion component (45) is movably disposed on the base plate (41) and located on the side of the movable plate (43) away from the fixed plate (42). One end of the propulsion component (45) contacts and abuts against the movable plate (43) so that it moves with the movable plate (43). The end of the propulsion component (45) away from the movable plate (43) has a propulsion part (451) close to the ground.

2. The foundation pit support structure according to claim 1, characterized in that, The drainage device (4) also includes a drainage valve (46), and the movable plate (43) is provided with a drain outlet (431) for water discharge. The drain valve (46) is rotatably mounted on the movable plate (43), with its rotation axis located at its top and perpendicular to the direction of movement of the movable plate (43), and its rotation is used to control the opening and closing of the drain outlet (431); The propulsion component (45) has a limiting part (452) at one end near the movable plate (43); during the movement of the movable plate (43) on the base plate (41), the drain valve (46) is limited by the limiting part (452) to keep the drain outlet (431) closed; when the movable plate (43) moves to its limit position away from the fixed plate (42), the limiting part (452) makes limiting contact with the drain valve (46), and the drain valve (46) rotates under the force of water to open the drain outlet (431).

3. The foundation pit support structure according to claim 2, characterized in that, Both sides of the propulsion member (45) have guide portions (453) for guiding the discharged water to flow away from the movable plate (43).

4. The foundation pit support structure according to claim 1, characterized in that, The top of the base plate (41) has an inclined guide surface (411) that slopes downward away from the retaining wall (22), and the direction of movement of the movable plate (43) is parallel to the inclination direction of the guide surface (411).

5. The foundation pit support structure according to claim 4, characterized in that, The drainage device (4) also includes a plurality of floating elements (47) with a density less than that of water, and the plurality of floating elements (47) correspond one-to-one with the plurality of cavities (221); The floating component (47) is disposed in the cavity (221) and located above the corresponding positioning component (24). It moves vertically as the water level in the cavity (221) rises and falls, and remains in the cavity (221) to form a shield during its movement. The floating component (47) has a flow guide hole (471) inside. When the floating component (47) moves upward to the limit position, the two ends of the flow guide hole (471) are respectively connected to the space above the positioning component (24) of the cavity (221) and the space above the water storage tank (5).

6. The foundation pit support structure according to claim 5, characterized in that, The floating member (47) is provided with an elastic filter screen (48) on its periphery. During the movement of the floating element (47), the side of the filter screen (48) away from the floating element (47) remains in contact with the inner wall of the cavity (221).

7. The foundation pit support structure according to claim 6, characterized in that, The water supply pipe (33) communicates with the top of the cavity (221), and the floating member (47) remains below the position where the water supply pipe (33) communicates with the cavity (221) during its movement.

8. The foundation pit support structure according to claim 7, characterized in that, The top of the retaining wall (22) is provided with a plurality of anti-detachment rings (222) at a position close to the top opening of the plurality of cavities (221). When the floating member (47) moves in the cavity (221), the filter screen (48) is flared in the direction of approaching the anti-detachment ring (222); when the floating member (47) moves upward to the limit position, the filter screen (48) contacts the anti-detachment ring (222) to bend and deform, and the filter screen (48) is flared in the direction of approaching the positioning member (24).

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