A foundation pit drainage system

Abstract

The utility model relates to the field of foundation pit drainage, specifically relates to a foundation pit drainage system, including drain pipe, set up in the periphery of foundation pit, by a plurality of pipe sections detachable connection is formed, precipitation well, along the periphery of foundation pit interval sets up a plurality, is equipped with precipitation water pump and is connected to drain pipe through first connecting water pipe, water collecting pit, set up in the foundation pit, and are connected to drain pipe through second connecting water pipe. Through setting up drain pipe and precipitation well realizes pit outer pipe well precipitation, realizes pit inner open drainage through setting up water collecting pit, adopts the form that both are combined, can realize the efficient drainage of foundation pit. Through connecting water collecting pit to drain pipe through second connecting water pipe, the quick discharge of sewage in water collecting pit is convenient. Through setting up drain pipe as by a plurality of pipe sections detachable connection is formed, can be reused after the completion of engineering, reduces construction cost, and need not on -the -spot excavation drainage ditch, only needs on -the -spot in the on -the -spot assembling pipe section can realize the quick laying of drain pipe, has greatly shortened construction period.

Description

Technical Field

[0001] This utility model relates to the field of foundation pit drainage, and in particular to a foundation pit drainage system. Background Technology

[0002] Among existing foundation pit drainage technologies, the drainage ditch method is widely used due to its simple structure and convenient implementation. However, this method still has the following technical drawbacks: First, drainage ditches need to be excavated and constructed on-site, resulting in a long construction period and making it difficult to meet the needs of rapid construction; second, drainage ditches are usually temporary facilities that are backfilled or abandoned after the project is completed, resulting in a low reuse rate and significant waste of materials and manpower. Utility Model Content

[0003] The purpose of this utility model is to overcome the shortcomings of the existing technology and provide a foundation pit drainage system.

[0004] A foundation pit drainage system, comprising:

[0005] The drainage pipe is located outside the foundation pit and is composed of several detachable pipe sections. Multiple dewatering wells are spaced out along the perimeter of the foundation pit, each equipped with a dewatering pump and connected to the drainage pipe via a first connecting water pipe. A water collection pit is set inside the foundation pit and connected to the drainage pipe via a second connecting water pipe.

[0006] Preferably, the drain pipe is a PE pipe or a PVC pipe.

[0007] Preferably, the drain pipe is provided with a fixed connection port, and the first connecting water pipe is connected to the fixed connection port.

[0008] Preferably, the drain pipe is provided with a temporary connection port, and the second connecting water pipe is connected to the temporary connection port.

[0009] Preferably, the number of water collection pits is at least two, and the water collection pits are all located at the lowest elevation point of the foundation pit.

[0010] Preferably, the diameter of the dewatering well is 400mm-800mm.

[0011] Preferably, a filter layer is provided inside the precipitation well, and the filter layer is disposed against the inner wall of the precipitation well.

[0012] Preferably, a filter screen is installed inside the precipitation well, the filter screen is installed inside the filter material layer, and a sedimentation section is installed below the filter screen.

[0013] Preferably, the system also includes a sedimentation tank, and the drain pipe is connected to the sedimentation tank.

[0014] Preferably, the sedimentation tank is a three-stage sedimentation tank, a four-stage sedimentation tank, or a five-stage sedimentation tank.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model provides a foundation pit drainage system. It achieves external well dewatering through drainage pipes and dewatering wells, and internal open drainage through a sump pit. This combination of methods enables efficient drainage of the foundation pit. Secondly, connecting the sump pit to the drainage pipe via a second connecting pipe facilitates the rapid discharge of wastewater from the sump pit. Thirdly, the drainage pipe is constructed from several detachable pipe sections, allowing for reuse after completion, reducing construction costs. Furthermore, it eliminates the need for on-site excavation of drainage ditches; the drainage pipe can be quickly laid by assembling pipe sections on-site, significantly shortening the construction period. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the foundation pit drainage system described in this utility model.

[0017] Figure 2 This is a schematic diagram of the structure of the water collection pit draining into the drain pipe according to the present invention.

[0018] Figure 3 This is a schematic diagram of the structure of the drainage pipe from the precipitation well to the drainage pipe described in this utility model.

[0019] Figure 4 This is a schematic diagram of the structure of the precipitation well described in this utility model.

[0020] Marked in the image: 0-Foundation pit, 1-Drainage pipe, 11-Fixed connection port, 12-Temporary connection port, 2-Dewatering well, 21-First connecting water pipe, 22-Dewatering pump, 23-Filter media layer, 24-Filter screen, 25-Sedimentation section, 3-Collection pit, 31-Second connecting water pipe, 4-Sedimentation tank. Detailed Implementation

[0021] The present invention will be further described in detail below with reference to specific embodiments. However, it should not be construed as limiting the scope of the above-mentioned subject matter of the present invention to the following embodiments; all technologies implemented based on the content of the present invention fall within the scope of the present invention.

[0022] Unless otherwise specified, the terms "upper," "lower," "left," "right," "center," "inner," and "outer" used in the description of specific embodiments of this utility model to indicate orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product / equipment / device is usually placed during use. These terms are merely for the purpose of facilitating the description of the utility model solution or simplifying the description in specific embodiments, and for enabling those skilled in the art to quickly understand the solution, and do not indicate or imply that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific positional relationship. Therefore, they should not be construed as limitations on this utility model.

[0023] Furthermore, the use of terms such as "horizontal," "vertical," "suspended," "parallel," and "coaxial" does not imply that the corresponding device / component / element must be absolutely horizontal, vertical, suspended, parallel, or coaxial. Slight tilt or deviation is permissible, as long as it does not affect the normal function of the relevant component. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," not that the structure must be perfectly horizontal; a slight tilt is acceptable. "Coaxial" means that two components are arranged as coaxially as possible, allowing them to move coaxially or approximately coaxially when their relative positions change. Alternatively, it can be simplified to mean that the corresponding device / component / element, when arranged in "horizontal," "vertical," "suspended," "parallel," or "coaxial" directions, can have an error / deviation of ±10% relative to the corresponding direction, more preferably within ±8%, more preferably within ±6%, more preferably within ±5%, and more preferably within ±4%. For example, the deviation in the "coaxial" direction is controlled within 0.2-1mm, preferably within 0.2-0.5mm. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its function in the present invention.

[0024] Furthermore, the use of terms such as "first," "second," and "third" in terminology is merely for distinguishing descriptions of identical or similar components and should not be interpreted as emphasizing or implying the relative importance of a particular component.

[0025] Furthermore, in the description of the embodiments of this utility model, "several", "multiple", and "several" represent at least two. The number can be any number, such as two, three, four, five, six, seven, eight, or nine, and can even exceed nine.

[0026] Furthermore, in the description of the technical solution of this utility model, unless otherwise explicitly specified / limited / restricted, the terms "set up," "install," "connect," "link," "provided with," "laid out," and "arranged" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to common connection methods in the art, such as welding, riveting, bolting, and threaded connections. Such connections can be mechanical, electrical, or communication connections; they can be direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components.

[0027] Example 1 like Figures 1-4 As shown, this embodiment provides a foundation pit drainage system, including a drainage pipe 1, a dewatering well 2, and a sump pit 3.

[0028] Drainage pipe 1 is installed around the perimeter of foundation pit 0 to collect and transport groundwater around foundation pit 0. Optionally, drainage pipe 1 is arranged outside the capping beam of foundation pit 0.

[0029] Drainage pipe 1 is preferably made of PE or PVC pipe, which has advantages such as corrosion resistance, aging resistance, and long service life. The pipe sections are connected to form drainage pipe 1 through detachable connection methods such as flange connection.

[0030] The drain pipe 1 is equipped with a fixed connection port 11 and a temporary connection port 12. The fixed connection port 11 is a permanent connection interface, which adopts a flange connection or a heat fusion connection to ensure the reliability and sealing of the connection. The temporary connection port 12 is a detachable connection interface, which adopts a quick coupling or a threaded connection to facilitate flexible adjustment during construction and subsequent dismantling.

[0031] Multiple dewatering wells 2 are spaced out along the perimeter of foundation pit 0 to lower the groundwater level around the pit. The dewatering wells 2 are located on the outer side of the retaining structure of foundation pit 0. Depending on the actual site conditions and the impact of underground pipelines, the inner edge of the dewatering wells 2 can be laid approximately 1m along the outer edge of the retaining structure, with a spacing of 10m-20m. The actual location of the dewatering wells 2 can be adjusted appropriately based on the surrounding environment.

[0032] The borehole diameter of the precipitation well 2 is preferably between 400mm and 800mm, which can meet the precipitation requirements under different geological conditions.

[0033] like Figure 3 As shown, a groundwater pump 22 is installed in the groundwater well 2 to pump groundwater into the drainage pipe 1. The groundwater pump 22 is connected to the fixed connection port 11 of the drainage pipe 1 via a first connecting water pipe 21. The first connecting water pipe 21 is preferably made of flexible hose or steel pipe, which has good pressure resistance and durability.

[0034] like Figure 4As shown, a filter media layer 23 is installed inside the dewatering well 2 to filter silt and impurities in the groundwater and prevent pump blockage. The filter media layer 23 is preferably made of granular materials such as gravel and coarse sand, which have good permeability and filtration effect. A filter screen 24 is also installed inside the filter media layer 23 to further enhance the filtration effect. The filter screen 24 is preferably made of stainless steel mesh or nylon mesh, which is corrosion-resistant and not easily deformed. Each well can have one section of filter pipe and one section of sedimentation section 25 at the bottom.

[0035] A sump pit 3 is installed inside the foundation pit 0 to collect surface water and seepage water within the foundation pit. There are at least two sump pits 3, and each sump pit 3 is located at the lowest point of the foundation pit to ensure that accumulated water in the foundation pit can naturally collect into the sump pit 3.

[0036] like Figure 2 As shown, the sump 3 is connected to the temporary connection port 12 of the drain pipe 1 via a water pump and a second connecting water pipe 31. The second connecting water pipe 31 is preferably a flexible hose, which facilitates adjustment of the connection position according to the construction progress.

[0037] In an optional embodiment, this embodiment also includes a sedimentation tank 4, with a drain pipe 1 connected to the sedimentation tank 4.

[0038] Sedimentation tank 4 is used to treat pumped groundwater and surface water by sedimentation, removing silt and suspended solids to meet discharge standards before being discharged into municipal pipe networks or natural water bodies. Sedimentation tank 4 is preferably a three-stage, four-stage, or five-stage sedimentation tank for better sedimentation results.

[0039] The foundation pit drainage system in this embodiment achieves centralized discharge of groundwater around the foundation pit and surface water within the foundation pit by unifying the drainage from the dewatering well 2 and the sump pit 3 into the drainage pipe 1.

[0040] The use of modular drainage pipe 1 eliminates the need for on-site excavation of drainage ditches, significantly shortening the construction cycle and improving construction efficiency.

[0041] After the project is completed, the drainage pipe 1 can be disassembled, recycled and reused, avoiding the waste of materials and manpower caused by the backfilling of traditional drainage ditches, and has significant economic and environmental benefits.

[0042] Example 2 This embodiment provides a construction and installation method for a foundation pit drainage system, including the following steps: S1: Drainage pipe 1 is laid around the perimeter of the foundation pit 0. The direction and length of drainage pipe 1 are determined according to the perimeter of the foundation pit and the terrain conditions.

[0043] Drainage pipe 1 is preferably made of PE or PVC pipe, and the pipe sections are connected into a ring or U-shaped pipeline by detachable connection methods such as flange connection.

[0044] A fixed connection port 11 and a temporary connection port 12 are reserved on the drainage pipe 1. The fixed connection port 11 is used to connect to the dewatering well 2, and the temporary connection port 12 is used to connect to the sump 3.

[0045] S2: Excavate dewatering wells 2 at intervals along the periphery of the foundation pit 0. The diameter of the dewatering wells 2 is 400mm to 800mm, and the depth is determined according to the groundwater level and dewatering requirements.

[0046] The filter media layer 23 is filled into the dewatering well 2 in sequence. The filter media layer 23 is preferably made of gravel and coarse sand in layers, with coarse gravel as the bottom layer and fine sand as the top layer.

[0047] A filter screen 24 is installed inside the filter media layer 23. The filter screen 24 is made of stainless steel mesh or nylon mesh to prevent the filter media from entering the water pump.

[0048] The rainwater pump 22 is installed in the rainwater well 2, and the rainwater pump 22 is connected to the fixed connection port 11 of the drainage pipe 1 through the first connecting water pipe 21.

[0049] S3: Excavate a water collection pit 3 at the lowest elevation point within the foundation pit. The number of water collection pits 3 shall be at least two, and the depth and size shall be determined based on the area of ​​the foundation pit and the expected water catchment volume.

[0050] One end of the second connecting water pipe 31 is connected to the water pump in the sump 3, and the other end is connected to the temporary connection port 12 of the drain pipe 1. The second connecting water pipe 31 is preferably a flexible hose, which allows for flexible adjustment of the connection position according to the construction progress.

[0051] S4: Connect the outlet end of the drain pipe 1 to the sedimentation tank 4. The sedimentation tank 4 is preferably a three-stage sedimentation tank, a four-stage sedimentation tank, or a five-stage sedimentation tank.

[0052] The sedimentation tanks are connected at each stage by overflow weirs. After passing through each stage of sedimentation, silt and suspended solids settle down gradually, and the final discharged water meets the discharge standards. After purification in the five-stage sedimentation tanks, the water can be used for comprehensive purposes such as road cleaning and greening irrigation. Excess purified water is discharged into the municipal stormwater pipes.

[0053] S5: Regularly start the rainwater pump 22 to begin rainwater operation, and regularly check the operating status of the drainage pipe 1, connecting water pipe and sedimentation tank 4 to ensure that the drainage system is working properly.

[0054] During the construction of the foundation pit, the position of the sump pit 3 and the connection method of the second connecting water pipe 31 are adjusted in a timely manner according to the water accumulation in the foundation pit.

[0055] S6: After the foundation pit 0 is completed, stop the operation of the dewatering pump 22 and remove the second connecting water pipe 31 and the temporary connection port 12.

[0056] The drainage system was dismantled and recycled, including the drainage pipe 1, the dewatering pump 22 in the dewatering well 2, the first connecting water pipe 21, and other equipment. The sedimentation tank 4 was cleaned, and the dismantling of the drainage system was completed.

[0057] The dismantled drainage pipe 1 and related equipment can be reused in other projects, realizing the recycling of resources.

[0058] The construction and installation method of this embodiment is simple to operate, has a short construction period, and the drainage system can be disassembled and recycled, which significantly reduces project costs and improves construction efficiency.

[0059] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A foundation pit drainage system, characterized in that, include: The drainage pipe is located outside the foundation pit and is composed of several detachable pipe sections. Multiple dewatering wells are spaced out along the perimeter of the foundation pit, each equipped with a dewatering pump and connected to the drainage pipe via a first connecting water pipe. A water collection pit is set inside the foundation pit and connected to the drainage pipe via a second connecting water pipe.

2. The foundation pit drainage system according to claim 1, characterized in that, The drainage pipe is a PE pipe or a PVC pipe.

3. The foundation pit drainage system according to claim 2, characterized in that, The drain pipe is provided with a fixed connection port, and the first connecting water pipe is connected to the fixed connection port.

4. A foundation pit drainage system according to claim 2, characterized in that, The drain pipe is provided with a temporary connection port, and the second connecting water pipe is connected to the temporary connection port.

5. A foundation pit drainage system according to claim 1, characterized in that, The number of water collection pits is at least two, and the water collection pits are all located at the lowest point of the foundation pit.

6. A foundation pit drainage system according to claim 1, characterized in that, The diameter of the dewatering well is 400mm-800mm.

7. A foundation pit drainage system according to claim 5, characterized in that, The dewatering well is equipped with a filter material layer, which is attached to the inner wall of the dewatering well.

8. A foundation pit drainage system according to claim 7, characterized in that, The dewatering well is equipped with a filter screen, which is located within the filter media layer, and a sedimentation section is located below the filter screen.

9. A foundation pit drainage system according to any one of claims 1-8, characterized in that, It also includes a sedimentation tank, and the drain pipe is connected to the sedimentation tank.

10. A foundation pit drainage system according to claim 9, characterized in that, The sedimentation tank is a three-stage, four-stage, or five-stage sedimentation tank.

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