Construction site foundation pit dewatering and rainwater secondary utilization system and use method

Abstract

The invention relates to green construction, in particular to a construction site foundation pit dewatering and rainwater secondary utilization system and a use method. Comprising a water resource collection system, a sediment storage system and a pressurization supply system, the water resource collection system comprises catch basins, a precipitation pipeline and a water collecting well, the precipitation pipeline is communicated with the catch basins, and the catch basins are communicated with the water collecting well through a factory drainage official website; the sediment storage system comprises a muddy water tank, a first-stage sedimentation tank, a second-stage sedimentation tank, a third-stage sedimentation tank and a water storage tank which are communicated in sequence, and the water collecting well is communicated with the muddy water tank; the pressurization supply system comprises a water supply pump and a factory water supply pipe network, and the water supply pump is communicated with the reservoir. The device is low in cost, simple in structure, modularized, compact and reusable, saves water resources, and achieves green and environment-friendly construction.

Description

Technical Field

[0001] The invention relates to green construction, and in particular to a secondary utilization system and a use method of precipitation and rainwater from a foundation pit at a construction site. Background Art

[0002] As people's awareness of environmental protection increases, they pay more and more attention to the green construction of construction projects. As an important part of green construction, water conservation and secondary utilization play a pivotal role in green construction. However, the secondary utilization of water resources in projects is mostly in the primary stage, limited to the water supply in the car wash pool or the irrigation of green plants. The main reasons are as follows: First, the water quality of foundation pit precipitation in some areas is poor or the precipitation is small, which cannot meet the prerequisites for water resource utilization; second, the investment in water resource secondary utilization facilities is large, and the income obtained from the secondary utilization of water resources cannot make up for the expenditure. Summary of the invention

[0003] The present invention aims to solve the above-mentioned technical problems, thereby providing a low-cost, simple-structured, modular, compact, and recyclable construction site foundation pit precipitation and rainwater secondary utilization system and use method.

[0004] The present invention solves the technical problem and adopts the following technical solution: A secondary utilization system for foundation pit precipitation and rainwater at a construction site, including a water resource collection system, a sedimentation storage system and a pressurized supply system. The water resource collection system includes a rainwater well, a precipitation pipeline and a water collection well. The precipitation pipeline is connected to the rainwater well, and multiple rainwater wells are connected to the water collection well through the factory drainage official website; The sedimentation storage system comprises a muddy water tank, a primary sedimentation tank, a secondary sedimentation tank, a tertiary sedimentation tank and a water storage tank which are connected in sequence, and a water collection well is connected to the muddy water tank; The pressurized supply system includes a water supply pump and a plant water supply network, and the water supply pump is connected to a water reservoir.

[0005] A method for using a foundation pit dewatering and rainwater secondary utilization system at a construction site. During initial dewatering of the foundation pit, the lifting pump in the primary sedimentation tank is closed, and the foundation pit dewatering sequentially enters the rainwater well, the plant drainage network, the water collection well, and the muddy water tank, and flows out of the site through an external pipeline; after the water outlet from the dewatering pipeline is clear, the lifting pump in the primary sedimentation tank is turned on, and the foundation pit dewatering sequentially enters the muddy water tank, the primary sedimentation tank, the secondary sedimentation tank, the tertiary sedimentation tank, and the water storage tank, and enters the plant water supply network through a water supply pump.

[0006] Further, the optimization scheme of the present invention is: The rainwater wells are connected to each other through drainage pipes, and the outlet ends of the drainage pipes are connected to the water collection wells through collecting pipes.

[0007] The two ends of the precipitation pipeline are respectively connected with the precipitation well and the rainwater well, and a water flow generator is installed at the outlet end of the precipitation pipeline.

[0008] The water flow generator is electrically connected to a warning light installed on the foundation pit fence through a line.

[0009] The muddy water pool is provided with an external drainage pipeline.

[0010] A lifting pump is arranged in the primary sedimentation tank, and sewage pipes are arranged at the bottom of the primary sedimentation tank and the secondary sedimentation tank and are connected with the muddy water tank.

[0011] An overflow weir is arranged in the water reservoir, which divides the water reservoir into a four-stage sedimentation tank and a clear water tank. A mud pump is arranged in the four-stage sedimentation tank, and the clear water tank is connected with a water supply pump.

[0012] The clean water tank is provided with a water level sensor, and the water level sensor is electrically connected to the lifting pump in the primary sedimentation tank.

[0013] The rainwater well, water collection well, muddy water tank and primary sedimentation tank are all manufactured in a modular manner, and the secondary sedimentation tank, tertiary sedimentation tank and water storage tank are steel structures.

[0014] Compared with the prior art, the present invention using the above technical solution has the following beneficial effects: Low cost, simple structure, modularization, compactness, and recyclability, it saves water resources and achieves green and environmentally friendly construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a flow chart of an embodiment of the present invention; Figure 2 A plan view of a rainwater well according to an embodiment of the present invention; Figure 3 A cross-sectional view of a rainwater well according to an embodiment of the present invention; Figure 4 A schematic diagram of a rainwater well and a precipitation pipeline according to an embodiment of the present invention; Figure 5 A plan view of a muddy water tank, a water collection tank, and a primary sedimentation tank according to an embodiment of the present invention; Figure 6 for Figure 5 AA section view; Figure 7 for Figure 5 BB cross-sectional view; Figure 8 It is a plan view of a secondary sedimentation tank and a tertiary sedimentation tank according to an embodiment of the present invention; Fig. 9 for Figure 8 CC section view; Fig.10is an elevation view of a water storage tank according to an embodiment of the present invention; Fig.11 for Fig.10 DD cross-sectional view; Fig.12 A plan view of a pressurized supply system and a water reservoir according to an embodiment of the present invention; Fig.13 for Fig.12 EE cross-sectional view.

[0016] In the figure: rainwater well 1; drainage pipeline 101; water flow generator 2; warning light 201; precipitation pipeline 3; water collection well 4; muddy water tank 5; external drainage pipeline 501; water collection tank 6; primary pipeline 601; rainwater collecting pipe 602; primary sedimentation tank 7; lifting water pump 701; secondary pipeline 702; secondary sedimentation tank 8; short delivery pipe 801; sewage pipe 802; tertiary sedimentation tank 9; partition 901; tertiary pipeline 902; reservoir 10; overflow weir 1001; quaternary sedimentation tank 1002; clear water tank 1003; mud pump 11; mud pipeline 1101; water level sensor 12; variable frequency constant pressure pump 13; fire protection pipe network 14; municipal water supply pipe network 15. DETAILED DESCRIPTION

[0017] The present invention is further described in detail below with reference to the accompanying drawings and embodiments.

[0018] See also Figure 1 This embodiment provides a construction site foundation pit precipitation and rainwater secondary utilization system, which is mainly composed of a water resource collection system, a sedimentation storage system and a pressurized supply system. The water resource collection system is mainly composed of a rainwater well 1, a drainage pipeline 101, a precipitation pipeline 3 and a water collection well 4 ( Figure 2 , Figure 3 As shown), the rainwater well 1 and the water collection well 4 are both modularly manufactured, and are prefabricated concrete structures. The rainwater well 1 is located on the roadside, and adjacent ones are connected through the drainage pipe 101 via the rainwater well 1.

[0019] The precipitation well of the foundation pit is equipped with a precipitation pipeline 3 and a precipitation pump. The outlet of the precipitation pipeline 3 is connected to the rainwater well 1. The precipitation pump pumps the precipitation water of the foundation pit into the rainwater well 1. The outlet end of the drainage pipeline 101 of the rainwater well 1 is connected to a water collection well 4 at the lowest point. The outlet end of the precipitation pipeline 3 is equipped with a water flow generator 2 ( Figure 4 As shown in FIG. 1 , the water flow generator 2 is connected to the warning light 201 installed on the foundation pit fence through a line. When the precipitation pump is working, the water flow in the precipitation pipeline 3 drives the water flow generator 2 to work, and the warning light 201 emits a red light after receiving the current. The warning light 201 has two functions: the first is the night warning function of the foundation pit fence, and the second is to check the operation of the precipitation pump. When the warning light is not on, the operation status of the water pump should be checked to ensure the continuous and stable precipitation work.

[0020] The sedimentation storage system is mainly composed of a muddy water tank 5, a water collection tank 6, a primary sedimentation tank 7, a secondary sedimentation tank 8, a tertiary sedimentation tank 9 and a reservoir 10 ( Figure 5-Figure 7 As shown in FIG. 1 , the water collection well 4 is connected to the inlet of the muddy water tank 5 through a pipeline, and an external drainage pipeline 501 is installed at the bottom of the muddy water tank 5, and the external drainage pipeline 501 is connected to the municipal drainage network. The muddy water tank 5 is connected to the water collection tank 6 through a pipeline, and the rainwater collection pipe 602 is connected to the water collection tank 6. The water collection tank 6 is connected to the primary sedimentation tank 7 through a primary pipeline 601, and the rainwater collection pipe 602 is located above the primary pipeline 601. A lifting pump 701 is installed in the primary sedimentation tank 7, and the lifting pump 701 transports water to the secondary sedimentation tank 8 through a secondary pipeline 702.

[0021] The secondary sedimentation tank 8 and the tertiary sedimentation tank 9 are an integrated structure ( Figure 8 , Fig. 9 As shown in the figure, the secondary sedimentation tank 8 and the tertiary sedimentation tank 9 are steel plate welded structures, a partition 901 is provided between the secondary sedimentation tank 8 and the tertiary sedimentation tank 9, and a plurality of short delivery pipes 801 are installed at the lower part of the partition 901. A sewage pipe 802 is provided at the bottom of the secondary sedimentation tank 8 and the tertiary sedimentation tank 9, and the sewage pipe 802 is connected to the muddy water tank 5, and valves are installed at the sewage outlets of the secondary sedimentation tank 8 and the tertiary sedimentation tank 9.

[0022] The tertiary sedimentation tank 9 is connected to the water reservoir 10 through the tertiary pipeline 902. The water reservoir 10 is a steel plate welded structure ( Fig.10 , Fig.11 As shown in FIG. 1 , the bottom plate of the water reservoir 10 is provided with an overflow weir 1001, which divides the water reservoir 10 into a four-stage sedimentation tank 1002 and a clean water tank 1003. The water source of the tertiary sedimentation tank 9 first passes through the four-stage sedimentation tank 1002 for the fourth sedimentation. During the sedimentation process, impurities sink and clean water flows over the overflow weir 1001 of the water reservoir 10 to the clean water tank 1003. Two mud pumps 11 are installed in the four-stage sedimentation tank 1002, and the mud pump 11 is connected to the mud pipeline 1101. The clean water tank 1003 is installed with a water level sensor 12, which is electrically connected to a signal transmitter, which communicates with a signal receiver, and the lifting pump 701 in the primary sedimentation tank 7 is electrically connected to the signal receiver.

[0023] The pressure supply system is mainly composed of two variable frequency constant pressure pumps 13, supporting valves and plant water supply network ( Fig.12 , Fig.13 As shown, the inlet of the variable frequency constant pressure pump 13 is connected to the outlet of the clean water tank 1003 through a pipeline, and the outlet of the variable frequency constant pressure pump 13 is connected to the plant water supply network and the fire protection network 14, and the plant water supply network is connected to the municipal water supply network 15. There are two variable frequency constant pressure pumps 13, one for use and one for backup.

[0024] A method for using a foundation pit dewatering and rainwater secondary utilization system at a construction site. During initial dewatering of the foundation pit, a lifting pump 701 in a primary sedimentation tank 7 is closed, and the foundation pit dewatering sequentially enters a rainwater well 1, a plant drainage network, a water collection well 4, and enters a muddy water tank 5, and flows out of the site through an external pipeline 501. After the water from the dewatering pipeline 3 becomes clear, the lifting pump 701 in the primary sedimentation tank 7 is turned on, and the foundation pit dewatering sequentially enters a muddy water tank 5, a water collection tank 6, a primary sedimentation tank 7, a secondary sedimentation tank 8, a tertiary sedimentation tank 9, and a reservoir 10, and enters the plant water supply network through a variable frequency constant pressure pump 13.

[0025] The process water replenishment of the water reservoir 10 is automatically controlled. A water level sensor 12 is provided in the water reservoir 10, and the water level sensor 12 is electrically connected to an external signal transmitter. When the water reservoir 10 is short of water, the water level sensor 12 sends a working signal, and the signal is sent to the signal receiver of the primary sedimentation tank 7 through the signal transmitter. After receiving the signal, the signal receiver starts the lifting pump 701 in the primary sedimentation tank 7. The water inlet of the lifting pump 701 is provided with a wire mesh filter, and the water source after the primary sedimentation is transferred to the secondary sedimentation tank 8 through the secondary pipeline 702. After the water source is precipitated in the secondary sedimentation tank 8, it flows to the tertiary sedimentation tank 9 and finally gathers in the water reservoir 10.

[0026] The impurities inside the primary sedimentation tank 7 are manually cleaned by opening the upper cover. The cleaning method is to turn off the water supply power supply, pump out the accumulated water inside, and manually use a shovel to clean the impurities in the sedimentation tank. The bottom of the secondary sedimentation tank 8 and the tertiary sedimentation tank 9 is sloped with steel plates, and a sewage pipe 802 is set at the lowest point of the slope. The sewage pipe 802 is controlled by a ball valve. When the water quality is relatively turbid, the ball valve is opened, and the turbid water in the sedimentation tank flows through the sewage pipe 802 to the turbid water tank 5, and then flows out of the field.

[0027] The impurities in the fourth-stage sedimentation tank 1002 are cleaned by a mud pump 11 arranged in the water reservoir 10. The cleaning method is to turn on the mud pump 11, and the mud pump 11 lifts the muddy water in the fourth-stage sedimentation tank 1002 to the roadside rainwater pipe network. At this time, the lifting pump 701 of the first-stage sedimentation tank 7 is in a stopped state, and the muddy water is automatically collected into the muddy water tank 5 through the pipe network and flows out of the field.

[0028] When there are still impurities inside the fourth sedimentation tank 1002 after one cleaning, the lifting pump 701 of the first sedimentation tank 7 is turned on to replenish water to the fourth sedimentation tank 1002 according to the initial water storage work process. After the water replenishment is completed, the fourth sedimentation tank 1002 is cleaned for a second time according to the above process until it is cleaned to the desired standard.

[0029] The factory water supply network uses two water replenishment systems, one is the foundation pit precipitation and rainwater supply system, and the other is the municipal water supply network supply system. When the foundation pit precipitation and rainwater sources are sufficient, the above equipment is used to use the foundation pit precipitation and rainwater to supply water to the factory network. At this time, the municipal water supply pipe valve is in a closed state. When the foundation pit precipitation and rainwater sources are insufficient, the valves of the above equipment are closed, the valves of the municipal water supply network system are opened, and the municipal water supply network is used for water supply.

[0030] The above description is only a preferred feasible embodiment of the present invention, and does not limit the scope of rights of the present invention. All equivalent structural changes made using the contents of the present invention description and drawings are included in the scope of rights of the present invention.

Claims

1. A secondary utilization system for foundation pit precipitation and rainwater at a construction site, characterized by: Including water resource collection system, sedimentation storage system and pressurized supply system, The water resource collection system includes a rainwater well, a precipitation pipeline and a water collection well. The precipitation pipeline is connected to the rainwater well, and multiple rainwater wells are connected to the water collection well through the factory drainage official website; The sedimentation storage system comprises a muddy water tank, a primary sedimentation tank, a secondary sedimentation tank, a tertiary sedimentation tank and a water storage tank which are connected in sequence, and a water collection well is connected to the muddy water tank; The pressurized supply system includes a water supply pump and a plant water supply network, and the water supply pump is connected to a water reservoir.

2. The secondary utilization system of construction site foundation pit precipitation and rainwater according to claim 1, characterized in that: The rainwater wells are connected to each other through drainage pipes, and the outlet ends of the drainage pipes are connected to the water collection wells through collecting pipes.

3. The secondary utilization system of construction site foundation pit precipitation and rainwater according to claim 1, characterized in that: The two ends of the precipitation pipeline are respectively connected with the precipitation well and the rainwater well, and a water flow generator is installed at the outlet end of the precipitation pipeline.

4. The secondary utilization system of construction site foundation pit precipitation and rainwater according to claim 3 is characterized by: The water flow generator is electrically connected to a warning light installed on the foundation pit fence through a line.

5. The secondary utilization system of construction site foundation pit precipitation and rainwater according to claim 1, characterized in that: The muddy water pool is provided with an external drainage pipeline.

6. The secondary utilization system of precipitation and rainwater in the construction site foundation pit according to claim 1, characterized in that: A lifting pump is arranged in the primary sedimentation tank, and sewage pipes are arranged at the bottom of the primary sedimentation tank and the secondary sedimentation tank and are connected with the muddy water tank.

7. The secondary utilization system of construction site foundation pit precipitation and rainwater according to claim 1, characterized in that: An overflow weir is arranged in the water reservoir, which divides the water reservoir into a four-stage sedimentation tank and a clear water tank. A mud pump is arranged in the four-stage sedimentation tank, and the clear water tank is connected with a water supply pump.

8. The secondary utilization system of construction site foundation pit precipitation and rainwater according to claim 7, characterized in that: The clean water tank is provided with a water level sensor, and the water level sensor is electrically connected to the lifting pump in the primary sedimentation tank.

9. The secondary utilization system of precipitation and rainwater in the construction site foundation pit according to claim 1, characterized in that: The rainwater well, water collection well, muddy water tank and primary sedimentation tank are all modularly manufactured, and the secondary sedimentation tank, tertiary sedimentation tank and water storage tank are steel structures.

10. A method for using the construction site foundation pit precipitation and rainwater secondary utilization system according to any one of claims 1 to 9, characterized in that: During the initial precipitation of the foundation pit, the lifting pump in the first-level sedimentation tank is closed, and the precipitation of the foundation pit enters the rainwater well, the factory drainage network, the collection well, and the muddy water tank in turn, and flows out of the site through the external pipeline; after the water out of the precipitation pipeline is clear, the lifting pump in the first-level sedimentation tank is turned on, and the precipitation of the foundation pit enters the muddy water tank, the first-level sedimentation tank, the second-level sedimentation tank, the third-level sedimentation tank and the water storage tank in turn, and enters the factory water supply network through the water supply pump.

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