Basement pressure-reducing anti-floating precipitation system and method for foundation pit advanced backfilling construction
By using a basement pressure-relieving anti-floating precipitation system with corrugated drainage pipes with seepage holes, filters, gravel layers and automatic extraction devices in the foundation pit early backfilling construction, the risk of floating in the basement during the foundation pit early backfilling construction is solved, and the dual effects of safety and resource reuse are achieved.
Patent Information
- Application Number
- CN202510276042.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-10
- Publication Date
- 2025-05-27
AI Technical Summary
When the foundation pit is backfilled in advance, the basement peripheral foundation pit has not been fully completed, and there is a risk of floating up, and the prior art is difficult to effectively avoid the basement floating up.
A basement pressure-reducing anti-floating precipitation system is adopted, which includes burying corrugated drainage pipes with seepage holes in the backfill soil, installing filters and gravel layers, and equipped with automatic extraction and discharge devices and three-dimensional composite drainage networks. By automatically detecting and extracting hydraulic water levels, the pressure and water level of the basement are reduced.
It effectively avoids the risk of floating up the basement during the early backfilling of the foundation pit, ensures the safety of the basement's early backfilling structure, and realizes the recycling and reuse of water resources.
Smart Images
Figure CN120042228A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of building construction, and particularly relates to a basement decompression anti-floating and dewatering system and method for early backfilling construction of foundation pits. Background Art
[0002] In buildings such as high-rise residential projects constructed in southern regions, with the emergence and exposure of the problem of basement floating, the anti-floating of basements has been increasingly emphasized in this field. Common anti-floating measures in this field are: setting blind ditches or pressure relief wells on the bottom slab to prevent the basement from floating, and generally no anti-floating measures are set for the foundation pits around the basement. However, during the actual construction process of the project, in order to expand the working surface or speed up the construction progress, the foundation pits around the basement sometimes need to be backfilled in advance. At this time, the upper structure has not been fully completed, that is, the designed surcharge on the top slab has not reached the anti-floating requirement. When rainwater and surface runoff seep into the backfilled soil, the abundant water body leads to a risk of floating. Therefore, how to avoid the floating of the basement during the early backfilling construction of the foundation pits around the basement has become an urgent technical problem to be solved in this field. Summary of the Invention
[0003] The purpose of the present invention is to provide a basement decompression anti-floating and dewatering system and method for early backfilling construction of foundation pits to solve the problem of basement floating under the condition of early backfilling of the foundation pits around the basement.
[0004] To solve the above technical problems, the present invention provides a basement decompression anti-floating and dewatering system for early backfilling construction of foundation pits, including: burying a corrugated drain pipe with water seepage holes in the backfilled soil during the early backfilling construction of the foundation pit, the corrugated drain pipe being exposed on the upper surface of the backfilled soil, a filter net installed at the lower end of the corrugated drain pipe, a gravel layer piled around the corrugated drain pipe, and further including an automatic drainage device, the automatic drainage device being inserted into the corrugated drain pipe through a water inlet pipe, and the automatic drainage device being connected with a water outlet pipe.
[0005] Furthermore, the basement decompression anti-floating and dewatering system for early backfilling construction of foundation pits provided by the present invention further includes a three-dimensional composite drainage net wrapped around the periphery of the corrugated drain pipe.
[0006] Furthermore, for the basement decompression anti-floating and dewatering system for early backfilling construction of foundation pits provided by the present invention, the three-dimensional composite drainage net is tied to the corrugated drain pipe by helically wound steel bars.
[0007] Furthermore, for the basement decompression anti-floating and dewatering system for early backfilling construction of foundation pits provided by the present invention, the water seepage holes of the corrugated drain pipe are distributed in a plum blossom shape.
[0008] Furthermore, for the basement decompression anti-floating and dewatering system for early backfilling construction of foundation pits provided by the present invention, the filter net is a double-layer filter net.
[0009] Further, for the basement decompression anti - floating and dewatering system used in the early backfill construction of the foundation pit, the anti - floating water level liquid detection device of the automatic drainage device is arranged in the corrugated drainage pipe. When the anti - floating water level liquid detection device detects that the water level in the corrugated drainage pipe is greater than the anti - floating water level elevation, the automatic drainage device automatically drains the water in the corrugated drainage pipe through the outlet pipe.
[0010] The present invention also provides a method for basement decompression anti - floating and dewatering in the early backfill construction of the foundation pit, including:
[0011] Filter the water in the backfill soil of the early backfill construction of the foundation pit through the gravel layer and the filter screen, and penetrate it into the corrugated drainage pipe through the water seepage holes;
[0012] Manually detect the hydraulic water level of the backfill soil of the early backfill construction of the foundation pit that penetrates into the corrugated drainage pipe. When the hydraulic water level exceeds the anti - floating water level elevation, start the automatic drainage device to pump out the hydraulic water level in the corrugated drainage pipe through the inlet pipe and the drain pipe, so as to reduce the pressure and water level of the basement under the working condition of the early backfill construction of the foundation pit and conduct decompression anti - floating and dewatering for the basement; when the hydraulic water level does not exceed the anti - floating water level elevation, turn off the automatic drainage device and stop draining the hydraulic water level in the corrugated drainage pipe.
[0013] The present invention also provides a method for basement decompression anti - floating and dewatering in the early backfill construction of the foundation pit, including:
[0014] Filter the water in the backfill soil of the early backfill construction of the foundation pit through the gravel layer and the filter screen, and penetrate it into the corrugated drainage pipe through the water seepage holes;
[0015] Automatically detect the hydraulic water level of the backfill soil of the early backfill construction of the foundation pit that penetrates into the corrugated drainage pipe through the anti - floating water level liquid detection device. When the hydraulic water level exceeds the anti - floating water level elevation, the automatic drainage device automatically pumps out the hydraulic water level in the corrugated drainage pipe through the inlet pipe and the drain pipe, so as to automatically reduce the pressure and water level of the basement under the working condition of the early backfill construction of the foundation pit and conduct decompression anti - floating and dewatering for the basement; when the hydraulic water level does not exceed the anti - floating water level elevation, turn off the automatic drainage device and stop draining the hydraulic water level in the corrugated drainage pipe.
[0016] Further, the method for basement decompression anti - floating and dewatering in the early backfill construction of the foundation pit provided by the present invention includes:
[0017] Connect the drain pipe to the water collection device, and pump out and store the hydraulic water level in the corrugated drainage pipe in the water collection device through the automatic drainage device.
[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:
[0019] The basement decompression anti - floating dewatering system and method for early backfilling construction of foundation pits provided by the present invention filter the water in the backfill soil of the early backfilling construction of the foundation pit through a gravel layer and a filter screen, and the water penetrates into the corrugated drain pipe through the water seepage holes. The hydraulic water level in the corrugated drain pipe is detected. When the hydraulic water level exceeds the elevation of the anti - floating water level liquid surface, the automatic drainage device automatically drains the hydraulic water level in the corrugated drain pipe through the water inlet pipe and the drain pipe, discharges the groundwater pressure, reduces the floating risk, and automatically reduces the pressure and water level of the basement under the condition of early backfilling construction of the foundation pit to carry out decompression anti - floating dewatering of the basement, so as to prevent the basement from floating under the condition of early backfilling of the foundation pit around the basement, thereby ensuring the safety of the early backfilled structure of the basement. Brief Description of the Drawings
[0020] Figure 1 It is a schematic elevation structure diagram of the basement decompression anti - floating dewatering system for early backfilling construction of foundation pits;
[0021] As shown in the figure:
[0022] 100. Basement decompression anti - floating dewatering system, 101. Backfill soil, 102. Corrugated drain pipe, 103. Water seepage holes, 104. Filter screen, 105. Gravel layer, 106. Automatic drainage device, 107. Water inlet pipe, 108. Outlet pipe, 109. Composite drainage net, 110. Steel bars, 111. Elevation of anti - floating water level liquid surface. Detailed Embodiments
[0023] The present invention will be described in detail below with reference to the drawings: According to the following description, the advantages and features of the present invention will be clearer. It should be noted that the drawings are all in a very simplified form and use non - precise scales, only for conveniently and clearly assisting in explaining the purpose of the embodiments of the present invention.
[0024] Please refer to Figure 1, an embodiment of the present invention provides a basement decompression anti - floating dewatering system 100 for early backfill construction of a foundation pit, including: a corrugated drain pipe 102 with water seepage holes 103 buried in the backfill soil 101 during the early backfill construction of the foundation pit. The corrugated drain pipe 102 is exposed on the upper surface of the backfill soil 101, where the backfill soil is usually flush with the natural ground. A filter screen 104 installed at the lower end of the corrugated drain pipe 102, a gravel layer 105 piled around the corrugated drain pipe 102, and also including an automatic drainage device 106. The automatic drainage device 106 is inserted into the corrugated drain pipe 102 through a water inlet pipe 107, and the automatic drainage device 106 is connected with a water outlet pipe 108. The filter screen 104 can hermetically seal the lower end of the corrugated drain pipe 102 to prevent larger particles or soil from entering the corrugated drain pipe 102 and causing blockage. The gravel layer 105 can be filled from the bottom of the foundation pit to the natural ground. The automatic drainage device 106 can be an automatic water pump, an automatic drainage pump, etc.
[0025] In order to automatically detect the hydraulic water level in the corrugated drain pipe 102 and reduce the problem of untimely detection caused by manual detection, in the basement decompression anti - floating dewatering system 100 for early backfill construction of a foundation pit provided by an embodiment of the present invention, the automatic drainage device 106 includes, but is not limited to, anti - floating water level liquid detection devices such as a float valve. The anti - floating water level liquid detection device is arranged in the corrugated drain pipe 102. When the anti - floating water level liquid detection device detects that the water level in the corrugated drain pipe 102 is greater than the anti - floating water level elevation 111, the automatic drainage device 106 automatically drains the water in the corrugated drain pipe 102 through the water outlet pipe 108.
[0026] An embodiment of the present invention also provides a basement decompression anti - floating dewatering method for early backfill construction of a foundation pit, which may include:
[0027] Step 201, filter the water in the backfill soil 101 during the early backfill construction of the foundation pit through the gravel layer 105 and the filter screen 104, and infiltrate it into the corrugated drain pipe 102 through the water seepage holes 103.
[0028] Step 202, manually detect the hydraulic water level of the backfill soil 101 that has penetrated into the corrugated drain pipe 102 during the early backfilling construction of the foundation pit, or automatically detect the hydraulic water level of the backfill soil 101 that has penetrated into the corrugated drain pipe 102 during the early backfilling construction of the foundation pit through the anti-floating water level liquid detection device. When the hydraulic water level exceeds the anti-floating water level liquid elevation 111, the automatic drainage device 106 automatically drains the hydraulic water level in the corrugated drain pipe 102 through the water inlet pipe 107 and the drain pipe, so as to automatically reduce the pressure and water level of the basement under the working condition of the early backfilling construction of the foundation pit and relieve the pressure on the basement for anti-floating dewatering; when the hydraulic water level does not exceed the anti-floating water level liquid elevation 111, turn off the automatic drainage device 106 and stop draining the hydraulic water level in the corrugated drain pipe 102.
[0029] The basement pressure relief and anti-floating dewatering system 100 and method for the early backfilling construction of the foundation pit provided by the embodiments of the present invention filter the water in the backfill soil 101 of the early backfilling construction of the foundation pit through the gravel layer 105 and the filter net 104, and the water penetrates into the corrugated drain pipe 102 through the water seepage holes 103. The hydraulic water level in the corrugated drain pipe 102 is detected. When the hydraulic water level exceeds the anti-floating water level liquid elevation 111, the automatic drainage device 106 automatically drains the hydraulic water level in the corrugated drain pipe 102 through the water inlet pipe 107 and the drain pipe, discharges the groundwater pressure, reduces the floating risk, so as to automatically reduce the pressure and water level of the basement under the working condition of the early backfilling construction of the foundation pit and relieve the pressure on the basement for anti-floating dewatering, so as to prevent the basement from floating under the condition of the early backfilling of the foundation pit around the basement, thereby ensuring the safety of the early backfilled structure of the basement.
[0030] Please refer to Figure 1 In order to protect the corrugated drain pipe 102 and prevent it from being damaged or extruded and deformed by the gravel in the gravel layer 105, the basement pressure relief and anti-floating dewatering system 100 and method for the early backfilling construction of the foundation pit provided by the embodiments of the present invention further include a three-dimensional composite drainage net 109 wrapped around the periphery of the corrugated drain pipe 102. The three-dimensional composite drainage net 109 can be tied to the corrugated drain pipe 102 through the spirally wound steel bars 110. Then the corrugated drain pipe 102 is protected by the three-dimensional composite drainage net 109 to buffer it from the gravel layer 105. In addition, the spirally wound steel bars 110 form a stiffness protection layer, thus avoiding the corrugated drain pipe 102 from being damaged or extruded and deformed. When the corrugated drain pipe 102 needs to be lengthened, the spirally wound steel bars 110 can also play a role in strengthening the adjacent two sections of the corrugated drain pipe 102 to prevent them from becoming disconnected.
[0031] Please refer to Figure 1, in order to improve the water seepage effect of the corrugated drain pipe 102 and enable water in the backfill soil of the foundation pit backfilled in advance to seep into the corrugated drain pipe 102 in different directions, the basement decompression anti-floating dewatering system 100 for the foundation pit backfilled in advance provided by the embodiment of the present invention has the water seepage holes 103 of the corrugated drain pipe 102 distributed in a plum blossom shape along the pipe body direction.
[0032] Please refer to Figure 1 , in order to improve the filtration efficiency at the lower end of the corrugated drain pipe 102, the basement decompression anti-floating dewatering system 100 and method for the foundation pit backfilled in advance provided by the embodiment of the present invention have the filter screen 104 as a double-layer filter screen, for example: a double-layer dense mesh filter screen. In order to ensure the reliability of the installation of the filter screen 104 on the corrugated drain pipe 102, the filter screen 104 needs to be turned up a certain distance on the corrugated drain pipe 102. In order to further improve the reliable connection of the filter screen 104 on the corrugated drain pipe 102, the three-dimensional composite drainage net 109 can wrap the filter screen 104.
[0033] In order to realize the recycling and reuse of water resources, the basement decompression anti-floating dewatering system and method for the foundation pit backfilled in advance provided by the embodiment of the present invention may further include:
[0034] Step 203, connect the drain pipe to a water collection device (not shown), and use the automatic drainage device 106 to drain and store the hydraulic water level in the corrugated drain pipe 102 in the water collection device.
[0035] The water stored by the water collection device can realize the recycling and reuse of groundwater, save resources and be beneficial to environmental protection.
[0036] The basement decompression anti-floating dewatering system and method for the foundation pit backfilled in advance provided by the embodiment of the present invention automatically drain and guide the groundwater and surface water under the construction conditions of the foundation pit backfilled in advance that seep into the corrugated drain pipe 102 through the automatic drainage device 106 of the basement decompression anti-floating dewatering system 100, ensuring that the groundwater level is below the anti-floating water level.
[0037] The basement decompression anti-floating dewatering system and method for the foundation pit backfilled in advance provided by the embodiment of the present invention have simple construction operations, strong feasibility, low cost and good dewatering effects.
[0038] The present invention is not limited to the above specific embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present invention fall within the scope of protection of the present invention. Those skilled in the art can make other levels of modifications and changes to the present invention. Thus, if these modifications and changes of the present invention are within the scope of the claims of the present invention, the present invention also intends to include these alterations and changes.
Claims
1. A basement decompression and anti-floating precipitation system for early backfill construction of foundation pit, characterized in that: include: A corrugated drainage pipe with seepage holes is buried in the backfill soil of the foundation pit in advance, the corrugated drainage pipe is exposed on the upper surface of the backfill soil, a filter net is installed at the lower end of the corrugated drainage pipe, a gravel layer is piled on the periphery of the corrugated drainage pipe, and an automatic pumping device is also included. The automatic pumping device is inserted into the corrugated drainage pipe through an inlet pipe, and the automatic pumping device is connected to an outlet pipe.
2. The basement decompression and anti-floating dewatering system for early backfilling of foundation pit according to claim 1 is characterized in that: It also includes a three-dimensional composite drainage net wrapped around the periphery of the corrugated drainage pipe.
3. The basement decompression and anti-floating dewatering system for early backfilling of foundation pit according to claim 2 is characterized in that: The three-dimensional composite drainage net is tied to the corrugated drainage pipe through spirally wound steel bars.
4. The basement decompression and anti-floating dewatering system for early backfilling of foundation pit according to claim 1 is characterized in that: The seepage holes of the corrugated drainage pipe are distributed in a plum blossom shape.
5. The basement decompression and anti-floating dewatering system for early backfilling of foundation pit according to claim 1 is characterized in that: The filter screen is a double-layer filter screen.
6. The basement decompression and anti-floating dewatering system for early backfilling of foundation pit according to claim 1 is characterized in that: The anti-floating water level detection device of the automatic pumping device is arranged in the corrugated drain pipe. When the anti-floating water level detection device detects that the water level in the corrugated drain pipe is greater than the anti-floating water level elevation, the automatic pumping device automatically drains the water in the corrugated drain pipe through the outlet pipe.
7. A basement decompression and anti-floating precipitation method for early backfilling of foundation pit according to claim 1, characterized in that: include: The water in the backfill soil of the foundation pit backfilled in advance is filtered through the crushed stone layer and the filter net, and then penetrates into the corrugated drainage pipe through the seepage holes; Manually detect the hydraulic water level of the backfill soil in the early backfill construction of the foundation pit that penetrates into the corrugated drainage pipe. When the hydraulic water level exceeds the anti-floating water level elevation, start the automatic pumping device to pump out the hydraulic water level in the corrugated drainage pipe through the water inlet pipe and the drainage pipe, so as to reduce the pressure and water level of the basement under the early backfill construction conditions of the foundation pit, and perform decompression and anti-floating precipitation on the basement; when the hydraulic water level does not exceed the anti-floating water level elevation, turn off the automatic pumping device and stop draining the hydraulic water level in the corrugated drainage pipe.
8. A basement decompression and anti-floating precipitation method for early backfilling of foundation pits according to claim 6, characterized in that: include: The water in the backfill soil of the foundation pit backfilled in advance is filtered through the crushed stone layer and the filter net, and then penetrates into the corrugated drainage pipe through the seepage holes; The hydraulic water level of the backfill soil in the early backfill construction of the foundation pit is automatically detected by the anti-floating water level detection device. When the hydraulic water level exceeds the anti-floating water level elevation, the automatic pumping device automatically pumps out the hydraulic water level in the corrugated drainage pipe through the water inlet pipe and the drainage pipe, so as to automatically reduce the pressure and water level of the basement under the early backfill construction conditions of the foundation pit, and perform decompression and anti-floating precipitation in the basement; when the hydraulic water level does not exceed the anti-floating water level elevation, the automatic pumping device is closed to stop draining the hydraulic water level in the corrugated drainage pipe.
9. The basement decompression and anti-floating precipitation method for early backfill construction of foundation pit according to claim 7 or 8, characterized in that: include: The drainage pipe is connected to the water collecting device, and the hydraulic water level in the corrugated drainage pipe is pumped out and stored in the water collecting device through the automatic pumping device.