System for simulating LID facility design and construction in sponge city construction process

Abstract

The invention discloses a system for simulating the design and construction of an LID facility in the construction process of a sponge city, and relates to the field of environmental engineering, the system comprises a base plate, and a raw water tank used for containing sewage as a water source required by the system; a water distributor is arranged at the top of the penetration test column and is used for simulating a natural rainfall process; the regulation and storage tank is used for storing effluent of the penetration test column for later use; the at least one LID facility test box is used for simulating an LID facility structure layer; and the tail water tank is used for storing system tail water. Compared with the prior art, the operation condition of the LID facility under the real condition can be simulated, the method is used for analyzing the LID facility, and design and construction of the LID facility in the sponge city construction process are guided.

Description

[0001] This application is a divisional application. The application number of the original application is 202011473792.6, the application date is December 15, 2020, and the name of the invention is "A sponge city LID facility simulation system." Technical Field

[0002] The present invention relates to the field of environmental engineering, and in particular to a system for simulating the design and construction of LID facilities in the process of sponge city construction. Background Art

[0003] The increase in impervious areas and extreme weather conditions during the urbanization process have caused urban waterlogging, which seriously threatens the safety of urban operations. Relevant reports point out that in the future, urban construction will emphasize "slow drainage and slow release" and "source dispersion" control as the main planning and design concepts, and adopt low-impact development measures to reduce rainwater runoff from the source. Specific implementation methods include sunken green spaces, rainwater infiltration ponds, rainwater gardens, infiltration wells, infiltration ground, infiltration pipes and ditches with grass, etc.

[0004] At present, the selection and construction of LID facilities in actual sponge city construction projects are mostly based on references to relevant atlases and technical standards, and LID facilities that meet actual conditions have not been designed according to local conditions. In some areas, it is difficult to obtain fillers in the unified atlas, while it is relatively easy to obtain other filler materials. If the atlas materials are used compulsorily, it will cause unnecessary economic waste. In the prior art, there is no systematic analysis device for the application effect of single or multiple combinations of LID facilities. Summary of the invention

[0005] The purpose of the present invention is to overcome the defects of the above-mentioned prior art and to provide a sponge city LID facility simulation system which can simulate the operation of LID facilities under real conditions, be used for analyzing LID facilities, and guide the design and construction of LID facilities during sponge city construction.

[0006] The purpose of the present invention can be achieved by the following technical solutions:

[0007] The designer learned that different packing layer materials, packing layer combinations, water flow rates, influent water quality, or different types of LID facility combinations in LID facilities will affect the pollutant reduction rate. In order to design and build LID facilities that are more in line with actual conditions, it is necessary to conduct experimental analysis on LID facilities before construction, so the following specific plan is proposed:

[0008] A system for simulating the design and construction of LID facilities in the process of sponge city construction, the system comprising a pad, and the following components connected in sequence on the pad:

[0009] The raw water tank is used to prepare and hold sewage according to the characteristics of the sewage to be treated, as the water source required by the system;

[0010] Permeation test column;

[0011] The regulating and storage tank is used to store and reserve the water from the permeation test column;

[0012] At least one LID facility test chamber for simulating the LID facility structural layer;

[0013] Tailwater tank, used to store system tailwater.

[0014] Furthermore, a water distributor is provided on the top of the infiltration test column to simulate a natural rainfall process; the water distributor is connected to the raw water tank through a diversion pipe.

[0015] Furthermore, the permeability test column is filled with fillers and is connected to the regulating reservoir through a diversion pipe. The fillers specifically include soil and / or fine sand and / or gravel.

[0016] Furthermore, the top of the LID facility test box is open.

[0017] Furthermore, the LID facility test box is connected to the regulating reservoir and the tailwater tank through a diversion pipeline.

[0018] Furthermore, the LID facility test box is connected to the regulating reservoir and another LID facility test box through a diversion pipeline.

[0019] Furthermore, a permeable baffle with holes is provided inside the LID facility test box, a filler area and plants are arranged above the permeable baffle, and the filler area is filled with gravel and / or fine sand and / or soil.

[0020] Furthermore, the diversion pipe is provided with a water pump and / or a flow meter.

[0021] Furthermore, a valve is provided on the diversion pipe.

[0022] Furthermore, a sampling port is provided on one side of the raw water tank and / or the permeation test column and / or the regulating reservoir and / or the LID facility test box.

[0023] Furthermore, the raw water tank is made of organic glass material, with an open box body at the top and a lower opening connected to a diversion pipe, which is connected to a water distributor after being lifted by a water pump.

[0024] Furthermore, the sampling port is made of polyvinyl chloride material and is installed at the bottom of the raw water tank, the permeation test column, the regulating reservoir, the LID facility test box and the tail water tank. A ball valve is provided on the sampling port to control the opening and closing of the sampling port.

[0025] Furthermore, the water pump is a centrifugal pump for lifting water out of the raw water tank, the regulating reservoir and the LID facility test tank to the next device.

[0026] Furthermore, the flow meter is a pipeline float flow meter, which can measure the water flow in the pipeline in real time.

[0027] Furthermore, the valve is a ball valve made of cast iron and can control the opening and closing of the pipeline.

[0028] Furthermore, the diversion pipe is made of stainless steel, has a pipe diameter of DN80, and is used to transfer water between the devices.

[0029] Furthermore, the water distributor is made of stainless steel, is round, has evenly spaced holes at the bottom, has a hole spacing of 10 mm, and has a hole diameter of 5 mm; the water distributor is installed above the infiltration test pile, and when water flows through, it is used to simulate a natural rainfall process.

[0030] Furthermore, the permeability test column is made of organic glass, cylindrical, with a diameter of 40 cm, connected to the raw water tank and the regulating reservoir through a conduit, and the column can be filled with soil, fine sand, gravel and other fillers according to experimental needs. The permeability test column is evenly opened from top to bottom and connected to the sampling port. The permeability test column has water inlet at the top and water outlet at the bottom.

[0031] Furthermore, the regulating and storing tank is made of organic glass, with an open box on the top, connected to the permeability test column and the LID facility test box through a conduit, and used to regulate and store water from the permeability test column. The regulating and storing tank has water inlet and outlet at the bottom.

[0032] Furthermore, the LID facility test box is made of plexiglass, with an open box on the top, connected to the regulating reservoir and other LID facility test boxes or tailwater tanks through a conduit. A permeable baffle is set at the bottom of the LID facility test box, and the permeable baffle has holes with a hole diameter of 1mm and a hole spacing of 10mm. The permeable baffle can be filled with fillers such as gravel, fine sand, soil, and planted plants to simulate the LID facility structure layer. The LID facility test box has water inlet at the top and water outlet at the bottom.

[0033] Furthermore, the tailwater tank is made of plexiglass, with an open top, connected to the LID facility test box through a conduit to store experimental tailwater. The tailwater tank has water inlet and outlet at the bottom. An emptying conduit and a ball valve are installed at the bottom of the tailwater tank to empty the water in the tank and can also be used for sampling.

[0034] Compared with the prior art, the present invention has the following advantages:

[0035] (1) The present invention can simulate the flow of rainwater through LID facilities during actual rainfall;

[0036] (2) Through the present invention, the reduction of pollutants by different LID facility structures and different LID facility combinations can be studied;

[0037] (3) The present invention is provided with a flow meter and a sampling port, which can monitor the flow rate and water quality changes in each monomer in real time;

[0038] (4) To facilitate promotion, the present invention can be configured in combination with the requirements of LID facility construction, so as to facilitate the popularization and promotion of the device in society. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 This is a schematic diagram of the overall installation of the simulation system in the embodiment;

[0040] Figure 2 Schematic diagram of the LID facility test box in the embodiment;

[0041] Figure 3 Schematic diagram of a water-permeable baffle in an embodiment;

[0042] Figure 4 This is a schematic diagram of the water inlet process of the present invention;

[0043] Numbers in the figure show: 1-raw water tank, 2-sampling port, 3-water pump, 4-flow meter, 5-valve, 6-diversion pipe, 7-water distributor, 8-permeability test column, 9-regulating reservoir, 10-LID facility test box, 11-pad, 12-tail water tank, 13-permeable baffle, 14-filling area. DETAILED DESCRIPTION

[0044] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0045] Example

[0046] A system for simulating the design and construction of LID facilities in the process of sponge city construction, such as Figure 1 and Figure 4 The system includes a backing plate 11, and the following components connected in sequence on the backing plate 11:

[0047] The raw water tank 1 is used to prepare and hold sewage according to the characteristics of the sewage to be treated, as the water source required by the system;

[0048] A permeation test column 8, a water distributor 7 is provided on the top of the permeation test column 8 for simulating a natural rainfall process; the water distributor 7 is connected to the raw water tank 1 through a diversion pipe 6;

[0049] The regulating reservoir 9 is used to store and reserve the water from the permeation test column 8;

[0050] Two LID facility test chambers 10, used to simulate the LID facility structure layer;

[0051] The tail water tank 12 is used to store system tail water.

[0052] The raw water tank 1 is made of organic glass, with a size of 600mm×600mm×600mm. The top of the tank is open, and a hole is opened at a position 5cm from the bottom. The hole diameter is 80mm, which is connected to the DN80 diversion pipe 6. After being lifted by the water pump 3, it is connected to the water distributor 7. A hole is opened at a position 5cm from the bottom of the raw water tank 1. The hole position is staggered with the hole of the diversion pipe 6. The hole diameter is 25mm, and a sampling port 2 is set.

[0053] The permeability test column 8 is made of organic glass, cylindrical, 40cm in diameter, 1.2m in height, and connected to the raw water tank 1 and the regulating reservoir 9 through the diversion pipe 6. The column can be filled with soil, fine sand, gravel and other fillers according to the experimental needs, and the filler is 15cm away from the top of the column. The permeability test column 8 is evenly opened from top to bottom, with a hole diameter of 25mm, connected to the sampling port 2, and the hole spacing is 30cm. A hole is opened at 15cm from the bottom of the permeability test column 8, with a hole diameter of 80mm, and connected to the DN80 diversion pipe 6. The permeability test column 8 is water inlet at the top and water outlet at the bottom.

[0054] The flow guide pipe 6 between the raw water tank 1 and the permeation test column 8 is provided with a water pump 3 and a flow meter 4, and valves 5 are provided on both sides of the flow meter 4.

[0055] The regulating and storing tank 9 is made of organic glass, with a size of 400mm×400mm×800mm, and the top of the box is open. It is connected to the permeability test column 8 and the LID facility test box 10 through the diversion pipe 6 to regulate the water from the permeability test column 8. The regulating and storing tank 9 has water inlet and outlet from the bottom. Two circular holes with a hole diameter of 80mm are opened at a position 5cm from the bottom of the regulating and storing tank 9, which are respectively connected to the DN80 diversion pipe 6 for water inlet and water outlet. A hole is opened at a position 10cm from the bottom of the box, with a hole diameter of 25mm, and a sampling port 2 is set.

[0056] like Figure 2 The LID facility test box 10 is made of organic glass, with a size of 800mm×800mm×1200mm, open at the top, and connected to the regulating reservoir 9 and other LID facility test boxes 10 or tailwater tank 12 through the diversion pipe 6. A permeable baffle 13 is set at the bottom of the LID facility test box 10 at a distance of 15cm from the bottom. Figure 3, the permeable baffle 13 has holes with a hole diameter of 1mm and a hole spacing of 10mm. There is a filler area 14 above the permeable baffle 13, which can be filled with gravel, fine sand, soil and other fillers, and is also planted with plants to simulate the structural layer of the LID facility. The LID facility test box 10 has water inlet at the top and outlet at the bottom. The upper water inlet hole is 80mm, connected to the diversion pipe 6, and the hole position is 5cm away from the top. The upper water outlet hole is 80mm, connected to the diversion pipe 6, and the hole position is 5cm away from the bottom. A hole is opened at the lower part of the box at a distance of 20cm from the bottom. The hole position is staggered with the hole of the diversion pipe 6. The hole diameter is 25mm, and a sampling port 2 is set.

[0057] A water pump 3 and a flow meter 4 are provided in the diversion pipeline 6 between the regulating reservoir 9 and the LID facility test box 10 and between two LID facility test boxes 10 , and valves 5 are provided on both sides of the flow meter 4 .

[0058] The tailwater tank 12 is made of organic glass, with a size of 600mm×600mm×600mm. The top of the tank is open and connected to the LID facility test box 10 through the diversion pipe 6 to store the system tailwater. The tailwater tank 12 has water inlet and outlet at the bottom. Valves 5 are provided on the diversion pipes 6 at the inlet and outlet of the tailwater tank 12.

[0059] The sampling port 2 is made of polyvinyl chloride material, and the diameter of the sampling port 2 is 25mm. It can be installed at the bottom of the raw water tank 1, the permeation test column 8, the regulating reservoir 9, the LID facility test box 10 and the tail water tank 12. A ball valve is set on the sampling port 2 to control the opening and closing of the sampling port 2. The water pump 3 is a centrifugal pump with a head of 1.5m and a flow rate of 1.5L / min. It can be used to lift the water out of the raw water tank 1, the regulating reservoir 9 and the LID facility test box 10 to the next device. The flow meter 4 is a pipeline float flowmeter, which can measure the water flow in the diversion pipe 6 in real time. The valve 5 is a ball valve made of cast iron with a diameter of DN80, which can control the opening and closing of the diversion pipe 6. The diversion pipe 6 is made of stainless steel with a diameter of DN80, which is used to transfer water between the monomers of each device. The water distributor 7 is made of stainless steel and is round. The lower part of the water distributor 7 is evenly perforated with holes, the hole spacing is 10 mm, the hole diameter is 5 mm, and the flow rate is not less than 1.5 L / min. The water distributor 7 is installed 10 cm above the infiltration test column 8. When the water flows through, it is evenly distributed to simulate the natural rainfall process.

[0060] In the raw water tank 1, the sewage is prepared according to the sewage characteristics as needed, which is used as the water source required for the test. The prepared sewage in the raw water tank 1 is lifted by the water pump 3 and enters the water distributor 7 through the diversion pipe 6. The water distributor 7 evenly distributes water to simulate the natural rainfall process. The water from the water distributor 7 enters the infiltration test column 8 for infiltration. The infiltration water is connected to the regulating reservoir 9 through the bottom diversion pipe 6. The water from the infiltration test column 8 is stored in the regulating reservoir 9 for standby use. The sewage in the regulating reservoir 9 is lifted by the water pump 3 and enters the LID facility test box 10 through the diversion pipe 6. The LID facility structure layer is set in the LID facility test box 10 according to the working conditions to be simulated. After the sewage infiltrates through the LID facility in the LID facility test box 10, it can enter the tail water tank 12 or be connected to other LID facility test boxes 10. Sampling ports 2 are respectively provided on the raw water tank 1, the permeation test column 8, the regulating reservoir 9, and the LID facility test box 10, and flow meters 4 are provided on the diversion pipes 6 connecting each unit to observe the changes in water quantity and water quality during the experiment for experimental analysis.

[0061] The above is only a preferred embodiment of the present invention, and does not limit the present invention in other forms. Any technician familiar with the profession may use the above disclosed technical content to change or modify it into an equivalent embodiment with equivalent changes. However, any simple modification, equivalent change and modification made to the above embodiment according to the technical essence of the present invention without departing from the technical solution of the present invention still belongs to the protection scope of the technical solution of the present invention.

Claims

1. A system for simulating the design and construction of LID facilities in the process of sponge city construction, characterized in that: It includes a backing plate and connected in sequence on the backing plate: The raw water tank is used to hold sewage and serves as the water source required by the system; Infiltration test column: A water distributor is provided on the top of the infiltration test column to simulate the natural rainfall process; The regulating and storage tank is used to store and reserve the water from the permeation test column; At least one LID facility test chamber for simulating the LID facility structural layer; Tailwater tank, used to store system tailwater.

2. A system for simulating the design and construction of LID facilities in the process of sponge city construction according to claim 1, characterized in that: The water distributor is connected to the raw water tank through a diversion pipe; the infiltration test column, the regulating reservoir, the LID facility test box, and the tail water tank are connected in sequence through the diversion pipe; a valve is provided on the diversion pipe.

3. A system for simulating the design and construction of LID facilities in the process of sponge city construction according to claim 2, characterized in that: The diversion pipeline is equipped with a water pump to lift the water out of the raw water tank, the regulating reservoir and the LID facility test box to the next device.

4. A system for simulating the design and construction of LID facilities in the process of sponge city construction according to claim 2, characterized in that: A flow meter is provided on the diversion pipe to measure the water flow rate in the pipe in real time.

5. A system for simulating the design and construction of LID facilities in the process of sponge city construction according to claim 3, characterized in that: The raw water tank is made of plexiglass material, with an open top and a hole in the bottom. The hole position is staggered with the hole in the diversion pipe, and a sampling port is set; after being lifted by a water pump, it is connected to the water distributor.

6. A system for simulating the design and construction of LID facilities in the process of sponge city construction according to claim 1, characterized in that: The permeability test column is made of plexiglass material and is filled with one or more fillers such as soil, fine sand, and gravel. The permeability test column has holes evenly opened from top to bottom and a sampling port is provided. The permeability test column has water inlet at the top and outlet at the bottom.

7. A system for simulating the design and construction of LID facilities in the process of sponge city construction according to claim 1, characterized in that: The regulating and storage tank is made of plexiglass, with an open top and a hole at the bottom for a sampling port; water enters and exits the regulating and storage tank from the bottom.

8. A system for simulating the design and construction of LID facilities in the process of sponge city construction according to claim 2, characterized in that: The LID facility test box is made of plexiglass, open on the top, with a permeable partition with holes inside, holes on the bottom, the positions of the holes are staggered with the holes in the diversion pipe, and a sampling port is set; the LID facility test box has water inlet at the top and water outlet at the bottom.

9. A system for simulating the design and construction of LID facilities in the process of sponge city construction according to claim 8, characterized in that: Above the permeable diaphragm there is a fill area which may be filled with crushed stone and / or fine sand and / or soil and planted with plants to simulate the structural layer of the LID facility.

10. A system for simulating the design and construction of LID facilities in the process of sponge city construction according to claim 1, characterized in that: The tailwater tank is made of plexiglass and is open at the top; water enters and exits the tailwater tank from the bottom.

Images