Sandy foundation drainage dewatering foundation pit leakage treatment and water resource utilization structure
By setting up drainage ditches, reservoirs and other components in foundation pit construction, groundwater is collected and utilized, the problems of foundation pit leakage and water resource utilization are solved, and the comprehensive utilization and conservation of water resources are achieved.
Patent Information
- Application Number
- CN202420401324.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-01
- Publication Date
- 2025-02-14
- Estimated Expiration
- 2034-03-01
AI Technical Summary
In the construction of sandy geological foundation pits, it is difficult for the existing technology to effectively block the water permeability of the foundation pit bottom and the seepage of the pit wall, resulting in the foundation pit being prone to leakage and failing to effectively utilize the collected groundwater, affecting the conservation of water resources.
Using drainage ditches, reservoirs, concealed ditches, inter-pile drainage structures, water collection wells, conduits, pumping mechanisms and float valves, etc., to build a sand-based drainage and precipitation foundation pit leakage treatment and water resource utilization structure to realize groundwater Collect, store and utilize.
Through this structure, the continuous drainage and utilization of leakage water in the foundation pit is achieved, water resources are saved, and after the foundation pit is completed, the water in the water collection well can be used for fire protection and daily cleaning, reflecting the characteristics of "sponge city" .
Smart Images
Figure CN222477521U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of foundation pit water-stopping structures, and in particular to a structure for treating seepage in a sandy foundation drainage and water resource utilization foundation pit. Background Art
[0002] Common foundation pit water-stopping and dewatering structures include water-stop curtains and dewatering wells. Because the sandy geology is often the site of the old riverbed and the groundwater is in a flowing state, the concrete sprayed by the high-pressure rotary jet piles of the water-stop curtain cannot solidify it and become a water-proof layer. The construction quality is difficult to achieve the requirements of isolating the water seepage at the bottom of the foundation pit and the water seepage on the pit wall. Leakage is prone to occur in the foundation pit, causing the foundation pit to be soaked in water, and the foundation at the bottom of the pit cannot be constructed normally. The design of dewatering wells outside the foundation pit may cause the settlement of surrounding houses, leading to safety hazards. The installation of dewatering wells in the foundation pit will increase the construction difficulty of the already narrow site, extend the construction period, and increase the construction cost.
[0003] The drainage ditch is constructed around the pit outside the foundation pit, and the permeable underground ditch is laid under the cushion layer around the foundation pit to drain the groundwater, creating good conditions for basement construction, saving costs and shortening the construction period. However, the current foundation pit dewatering and leakage treatment methods lack the utilization of the collected groundwater, which is not conducive to saving water resources. Utility Model Content
[0004] In order to improve the problem of insufficient utilization of collected groundwater in current foundation pit dewatering and leakage treatment methods, the present application provides a sandy foundation drainage and dewatering foundation pit leakage treatment and water resource utilization structure.
[0005] The present application provides a sandy foundation drainage and precipitation foundation pit leakage treatment and water resource utilization structure adopts the following technical solutions:
[0006] A sandy foundation drainage and water pit seepage treatment and water resource utilization structure, comprising:
[0007] A drainage ditch is arranged on the periphery of the top of the foundation pit along the circumference of the foundation pit;
[0008] A water reservoir is arranged outside the foundation pit and connected to the drainage ditch;
[0009] The blind ditch is arranged at the bottom of the foundation pit along the circumference of the foundation pit;
[0010] The drainage structure between the piles is used to drain the seepage water between the piles on the side wall of the foundation pit to the culvert;
[0011] A water collection well is set in the foundation pit;
[0012] A conduit, one end of which is connected to the dark ditch, and the other end of which is connected to the water collection well;
[0013] A pumping and drainage mechanism, used to pump water from the water collection well to the drainage ditch during foundation pit construction;
[0014] A float valve is installed at one end of the conduit located in the water collection well, and is used to control the water level in the water collection well after the foundation pit construction is completed.
[0015] The drainage ditch intercepts the accumulated water outside the foundation pit and guides it into the reservoir for collection. The drainage structure between piles drains the seepage water between piles on the side wall of the foundation pit to the culvert, realizing the continuous drainage of the leakage water. The conduit guides the water in the culvert into the collection well for collection. During the construction period, the pumping mechanism pumps the water in the collection well into the drainage ditch and then into the reservoir. The water in the reservoir can be used as construction water.
[0016] After the construction is completed, a float valve for controlling the water level will be installed at the outlet end of the conduit to keep the water level in the collection well lower than the bottom of the pile foundation pedestal. Due to the water storage characteristics of the sand and gravel geology, the collection well can continuously collect groundwater, and the water stored in the collection well can be used for fire fighting, daily cleaning and other purposes. In this way, the "permanent and temporary combination" of water resource utilization is realized, and the water storage function can be played at all times from the excavation of the foundation pit to the completion of the project, reflecting the characteristics of a "sponge city" and conducive to saving water resources.
[0017] Furthermore, the inter-pile drainage structure includes a drainage pipe, one end of which is connected to the inter-pile seepage point on the side wall of the foundation pit, and the other end of which is connected to the blind ditch.
[0018] The seepage water between the piles on the side wall of the foundation pit flows into the culvert through the drainage pipe, achieving continuous drainage of the leaking water and reducing the hidden dangers caused by leakage.
[0019] Furthermore, a filter tube connected to the conduit is arranged in the dark ditch, and a filter screen is coated on the outside of the filter tube.
[0020] Furthermore, a filter layer is provided in the dark ditch.
[0021] The seepage water between the piles flows into the culvert through the drainage pipe. After being filtered through the gravel layer and the filter screen, the water enters the conduit through the filter pipe and then flows into the water collection well. The filter layer and the filter screen help prevent mud and sand from entering the water collection well, facilitating the subsequent use of water.
[0022] Furthermore, the pumping and drainage mechanism includes a submersible pump disposed in the water collection well, and a water outlet end of the submersible pump is connected to the drainage ditch.
[0023] During the construction phase, the groundwater collected in the collection well is pumped into the drainage ditch on the ground through a submersible pump.
[0024] Furthermore, a booster pump is provided in the foundation pit, a water inlet end of the booster pump is connected to the water collection well, and a water outlet end of the booster pump is connected to a construction water pipe or a fire-fighting pipe.
[0025] Furthermore, a pressure stabilizing tank is provided at the water outlet of the booster pump.
[0026] The booster pump and pressure-stabilizing tank can adjust the water supply pressure according to water demand, making it easier to utilize the groundwater collected in the collection well.
[0027] Furthermore, a precipitation well is provided in the water reservoir.
[0028] The precipitation wells in the reservoir are used for groundwater recharge to ensure the water level difference inside and outside the pit and reduce the safety risk of subsidence of surrounding houses due to foundation pit drainage.
[0029] Furthermore, animals and plants for monitoring water quality are arranged in the water reservoir.
[0030] During the construction and excavation phase, fish, lotus and other animals and plants can be raised in the reservoir, and the water quality can be monitored by observing the growth status of animals and plants to ensure water safety. If the animals and plants grow normally, it means the water quality is good. The groundwater collected in the collection well and the reservoir can be used for construction water and firefighting during the construction period. After the foundation pit construction is completed, the groundwater collected in the collection well can continue to be used for firefighting, daily cleaning and other purposes; if the animals and plants grow abnormally, it means the water quality is poor and the collected water cannot be further used.
[0031] In summary, the present application includes at least one of the following beneficial technical effects:
[0032] 1. This application can play a role in water storage from the excavation of the foundation pit to the completion of the project, realize the comprehensive utilization of water resources, and is conducive to saving water resources;
[0033] 2. By setting a float valve, the water level in the water collection well is controlled to be kept lower than the bottom of the pile foundation pedestal. By setting a booster pump and a pressure-stabilizing tank, the water supply pressure can be adjusted according to water demand, so that the water in the water collection well can be used after the foundation pit construction is completed;
[0034] 3. By placing plants and animals in the reservoir, the water quality is continuously tested to ensure water safety. BRIEF DESCRIPTION OF THE DRAWINGS
[0035] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application;
[0036] Figure 2 It is a schematic diagram of the structure of the embodiment of the present application during the foundation pit construction stage;
[0037] Figure 3 It is a schematic diagram of the structure of the embodiment of the present application after the foundation pit construction is completed;
[0038] Figure 4It is a partial schematic diagram of the drainage structure between piles in the embodiment of the present application.
[0039] Figure numerals: 1. drainage ditch; 2. reservoir; 3. precipitation well; 4. culvert; 5. collection well; 6. drainage structure between piles; 7. drainage pipe; 8. conduit; 9. filter layer; 10. filter tube; 11. submersible pump; 12. float valve; 13. booster pump; 14. pressure regulating tank. DETAILED DESCRIPTION
[0040] The following is combined with Figure 1-4 This application is described in further detail.
[0041] The present application embodiment discloses a sandy foundation drainage and water resource utilization structure for foundation pit leakage treatment. Figure 1 The sand foundation drainage and precipitation foundation pit leakage treatment and water resource utilization structure includes a peripheral drainage ditch 1 set at the top of the foundation pit along the circumference of the foundation pit, a reservoir 2 connected to the drainage ditch 1 is set outside the foundation pit, and a precipitation well 3 for groundwater recharge can be set in the reservoir 2. The reservoir 2 is provided with a drainage outlet connected to the municipal rainwater inlet.
[0042] Reference Figure 1 and Figure 2 Two water collection wells 5 are arranged in the foundation pit, and the two water collection wells 5 are respectively located at two diagonal positions of the foundation pit. A blind ditch 4 is arranged at the bottom of the foundation pit along the circumference of the foundation pit, and a conduit 8 is connected between the water collection well 5 and the blind ditch 4. An inter-pile drainage structure 6 is arranged on the side wall of the foundation pit, which is used to drain the seepage water between the piles on the side wall of the foundation pit to the blind ditch 4.
[0043] Reference Figure 2 During the foundation pit construction, a pumping mechanism is provided in the water collection well 5 to pump the water in the water collection well 5 to the drainage ditch 1. Figure 3 After the foundation pit construction is completed, a float valve 12 for controlling the water level in the water collection well 5 is installed at one end of the conduit 8 located in the water collection well 5 .
[0044] The drainage ditch 1 intercepts the accumulated water outside the foundation pit and guides it into the water reservoir 2 for collection. The drainage structure 6 between piles guides the seepage water between piles on the side wall of the foundation pit to the culvert 4. The conduit 8 guides the water in the culvert 4 into the water collection well 5 for collection. During the foundation pit construction, the pumping mechanism pumps the water in the water collection well 5 to the drainage ditch 1 and then into the water reservoir 2. The water in the water reservoir 2 can be used as construction water. When the water level in the water reservoir 2 is too high, the excess water can be discharged from the drainage outlet into the municipal rainwater outlet.
[0045] Due to the water storage characteristics of the gravel geology, the water collection well 5 can continuously collect groundwater. After the foundation pit construction is completed, the float valve 12 used to control the water level is installed at the water outlet of the conduit 8 to keep the water level in the water collection well 5 lower than the bottom of the pile foundation pedestal. The water stored in the water collection well 5 can be used for fire fighting, daily cleaning of the basement, etc. In this way, the "permanent and temporary combination" of water resource utilization is realized, and the water storage function can be played in all periods from the excavation of the foundation pit to the completion of the project, reflecting the characteristics of the "sponge city" and conducive to saving water resources.
[0046] Reference Figure 4 , support piles are hung with mesh and sprayed with concrete; the drainage structure 6 between the piles includes a drainage pipe 7, one end of the drainage pipe 7 is inserted into the soil between the piles and connected to the seepage point between the piles on the side wall of the foundation pit, and the other end is inserted into the dark ditch 4.
[0047] When the foundation pit is excavated to the designed elevation, the leakage points between the piles on the side wall of the foundation pit are found, and the seepage water between the piles is drained into the culvert 4 through the drainage pipe 7 to achieve continuous drainage of the leakage water, avoid the falling of the hanging net, and reduce the hidden dangers caused by leakage.
[0048] Reference Figure 4 A filter tube 10 connected to the conduit 8 is provided at the bottom of the culvert 4, and a filter screen is coated on the outside of the filter tube 10. A filter layer 9 is provided in the culvert 4, and the filter layer 9 includes a gravel layer filled in the culvert 4. Further, the conduit 8 is a galvanized steel pipe pre-buried under the foundation cushion layer, the filter tube 10 is a PVC pipe with filter holes, and the filter screen coated on the outside of the filter tube 10 is a 12-mesh nylon net.
[0049] The seepage water between the piles flows into the culvert 4 through the drainage pipe 7, and the seepage water at the bottom of the foundation pit directly enters the culvert 4. After being filtered by the gravel layer and the filter screen, the water enters the conduit 8 through the filter pipe 10, and then flows into the water collection well 5 from the conduit 8; the gravel layer and the filter screen help to prevent mud and sand from entering the water collection well 5, which is convenient for the subsequent use of water.
[0050] Reference Figure 2 The pumping mechanism includes a submersible pump 11 disposed in the water collection well 5, and the water outlet of the submersible pump 11 is connected to the drainage ditch 1. During the foundation pit construction stage, the groundwater collected in the water collection well 5 is pumped and discharged to the drainage ditch 1 on the ground and then into the water storage tank 2 by the submersible pump 11.
[0051] In order to ensure water safety, fish, lotus and other animals and plants for monitoring water quality can be raised in the reservoir 2 .
[0052] During the excavation phase of the foundation pit construction, the water quality is monitored by observing the growth status of plants and animals. If the plants and animals grow normally, it means that the water quality is good, and the groundwater collected by the water collection well 5 and the reservoir 2 can be used for construction water and fire fighting water during the construction period. If the plants and animals grow abnormally, it means that the water quality is poor, and the collected water cannot be further used.
[0053] Due to the water storage characteristics of sandstone geology, the water collection well 5 can continuously collect groundwater. In the case of good water quality, in order to continue to collect and utilize groundwater through the water collection well 5 after the foundation pit construction is completed, after the foundation pit construction is completed, refer to Figure 3 , remove the submersible pump 11, and install the float valve 12 to the outlet end of the conduit 8 to control the water level in the water collection well 5. When the water level in the water collection well 5 is too low, the float valve 12 opens the outlet end of the conduit 8 to replenish water into the water collection well 5, and stops replenishing water when the predetermined water level is reached.
[0054] Further, refer to Figure 3 After the foundation pit construction is completed, a booster pump 13 is also installed in the foundation pit. The water inlet end of the booster pump 13 is connected to the water collection well 5, and the water outlet end of the booster pump 13 is connected to the construction water pipe or the fire fighting pipe; a pressure stabilizing tank 14 is installed at the water outlet end of the booster pump 13.
[0055] After the foundation pit construction is completed, the groundwater collected in the water collection well 5 can continue to be used for fire fighting, daily cleaning of the basement, etc. The booster pump 13 and the pressure regulating tank 14 can adjust the water supply pressure according to the water demand, so as to facilitate the utilization of the groundwater collected in the water collection well 5.
[0056] The implementation principle of the sandy foundation drainage and water resource utilization structure is as follows: the drainage ditch 1 intercepts the accumulated water outside the foundation pit and guides the accumulated water into the water reservoir 2 for collection, the drainage pipe 7 guides the seepage water between the piles on the side wall of the foundation pit to the culvert 4, and the conduit 8 guides the water in the culvert 4 into the water collection well 5 for collection. During the foundation pit construction, the submersible pump 11 pumps the water in the water collection well 5 to the drainage ditch 1 and then into the water reservoir 2, and the water in the water reservoir 2 can be used as construction water.
[0057] Due to the water storage characteristics of the gravel geology, the water collection well 5 can continuously collect groundwater. After the foundation pit construction is completed, the submersible pump 11 is removed, the booster pump 13 and the pressure-stabilizing tank 14 are installed, and the float valve 12 for controlling the water level is installed to the water outlet of the conduit 8. The water stored in the water collection well 5 can be used for fire fighting, daily cleaning of the basement, etc.; in this way, the "permanent and temporary combination" of water resource utilization is realized, and the water storage function can be played in all periods from the excavation of the foundation pit to the completion of the project, reflecting the characteristics of the "sponge city" and is conducive to saving water resources.
[0058] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.
Claims
1. A sandy foundation drainage and water pit seepage treatment and water resource utilization structure, characterized by: include: A drainage ditch is arranged on the periphery of the top of the foundation pit along the circumference of the foundation pit; A water reservoir is arranged outside the foundation pit and connected to the drainage ditch; The blind ditch is arranged at the bottom of the foundation pit along the circumference of the foundation pit; The drainage structure between the piles is used to drain the seepage water between the piles on the side wall of the foundation pit to the culvert; A water collection well is set in the foundation pit; A conduit, one end of which is connected to the dark ditch, and the other end of which is connected to the water collection well; A pumping and drainage mechanism, used to pump water from the water collection well to the drainage ditch during foundation pit construction; A float valve is installed at one end of the conduit located in the water collection well, and is used to control the water level in the water collection well after the foundation pit construction is completed.
2. The sandy foundation drainage and water resource utilization structure according to claim 1 is characterized by: The inter-pile drainage structure comprises a drainage pipe, one end of which is connected to the inter-pile water seepage point on the side wall of the foundation pit, and the other end of which is connected to the blind ditch.
3. The sandy foundation drainage and water resource utilization structure according to claim 1 is characterized by: A filter tube connected to the conduit is arranged in the dark ditch, and a filter screen is coated on the outside of the filter tube.
4. The sandy foundation drainage and water resource utilization structure according to claim 3 is characterized by: A filter layer is arranged in the dark ditch.
5. The sandy foundation drainage and water resource utilization structure according to claim 1 is characterized by: The pumping and drainage mechanism comprises a submersible pump arranged in the water collection well, and a water outlet end of the submersible pump is connected to the drainage ditch.
6. The sandy foundation drainage and water resource utilization structure according to claim 1 is characterized by: A booster pump is arranged in the foundation pit, the water inlet end of the booster pump is connected to the water collection well, and the water outlet end of the booster pump is connected to a construction water pipe or a fire-fighting pipe.
7. The sandy foundation drainage and water resource utilization structure according to claim 6 is characterized by: A pressure stabilizing tank is provided at the water outlet of the booster pump.
8. The sandy foundation drainage and water resource utilization structure according to claim 1 is characterized by: A precipitation well is arranged in the water reservoir.
9. The structure for treating seepage of a sandy foundation pit and utilizing water resources according to claim 1, characterized in that: Animals and plants for monitoring water quality are arranged in the water reservoir.