Device and method for measuring infiltration rate of sponge applied to green space construction of sponge city

A technology of sponge city and measuring device, which is applied in the direction of measuring device, permeability/surface area analysis, suspension and porous material analysis, etc. It can solve the problem that the detection results are greatly disturbed, fail to meet the requirements, and lack detection devices for sponge detection methods and other problems, to overcome the interference of measurement results and to overcome experimental errors

Pending Publication Date: 2018-11-09
上海绿地环境科技(集团)股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Field measurements mainly include double-ring infiltration method, simulated rainfall method, disc infiltration meter and Guelph infiltration meter method; among them, the Guelph method uses the Guelph infiltration meter to measure the infiltration coefficient of the in-situ soil. Since the original soil is not destroyed during the measurement, The measurement data is fast and accurate. The disadvantage is that the instrument is mainly imported, and the cost is high, and there are sometimes orders of magnitude differences between the test results and the indoor ring knife method commonly used in China.
Moreover, all the above-mentioned detection methods on infiltration are only applicable to natural soil whose soil structure has been stabilized, while the sponge used in the sponge city is artificially synthesized soil,

Method used

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  • Device and method for measuring infiltration rate of sponge applied to green space construction of sponge city
  • Device and method for measuring infiltration rate of sponge applied to green space construction of sponge city
  • Device and method for measuring infiltration rate of sponge applied to green space construction of sponge city

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] Determination of infiltration rate of high-permeability sponge material formulation for road isolation belt and permeable brick underlayment

[0070] Raw material 1 - high-quality farmland topsoil: select high-quality farmland topsoil, and its main control indicators (pH, EC, organic matter, texture) meet the requirements of the "Technical Specifications for Greening Topsoil Protection" (LY / T 2445-2015); to ensure the uniformity of raw materials To ensure the uniformity and stability of the formula materials, the topsoil is properly dried, crushed and passed through a 2mm sieve, and the sundries and impurities are removed for later use.

[0071] Raw material 2 - organic matrix: select high-quality peat, and its control indicators meet the requirements of "Organic Substrate for Greening" (GB / T 33891-2017); in order to ensure the uniformity of raw materials and the uniformity and stability of formula materials, the peat is properly dried and crushed Pass through a 5mm sie...

Embodiment 2

[0085] Determination of the infiltration rate of public green spaces, parks, etc. infiltration, water storage, and sponge material formulations

[0086] The requirements and pretreatment of the four raw materials are the same as in Example 1. According to the requirements of the engineering formula, measure high-quality farmland topsoil, organic substrate, and yellow sand, and the ratio of farmland topsoil, organic substrate, and yellow sand is 70%: 20%: 10 % (volume percent) ratio, mix to obtain the mixture, then add 0.5kg gypsum to every cubic mixture, mix evenly to obtain the sponge body, pay attention to preservation, and prevent pollution.

[0087] According to the specific implementation steps above, the test data are as follows (infiltration cartridge, sponge body thickness and water layer height are the same as example 1):

[0088] Sponge penetration rate measurement record sheet

[0089]

[0090] v=10*Q / (t*S)=10*47.0 / (10*50.78)=0.93mm / min=55.8mm / h

[0091] K=v*l / ...

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Abstract

The invention relates to a device and method for measuring the infiltration rate of a sponge applied to green space construction of a sponge city. The device comprises a Mariotte flask (3), a percolation column (9) and a latex air bag (16), wherein the percolation column (9) is internally provided with a perforated partition plate (10) used for placing a sponge to be measured; the top of the percolation column is opened and is provided with a sealing plug (8) connected with the Mariotte flask (3) and the latex air bag (16); and the bottom of the percolation column connected with a measuring cylinder (13) through a liquid outlet tube (12). The sponge to be measured is placed on the perforated partition plate (10) in the percolation column (9); the percolation column (9) is filled with air through the latex air bag (16) and is then filled with water; after the surface of the water is higher than the surface of the sponge to be measured, the percolation column (9) is connected with the Mariotte flask (3), and the air inlet hole of the Mariotte bottle (3) is aligned with the water surface in the percolation column (9); and then the infiltration rate is calculated according to the measurement parameters. Compared with the prior art, the device of the invention has the advantages of simplicity, low cost, easy operation and the like.

Description

technical field [0001] The invention belongs to the technical field of sponge city construction and testing, and in particular relates to a measuring device and method for sponge body infiltration rate used in sponge city green space construction. Background technique [0002] Sponge city is a new generation of urban rainwater management concept. The international general term is "low-impact development rainwater system construction": it refers to the strengthening of urban planning and construction management to give full play to the absorption of rainwater by buildings, roads, green spaces, water systems and other ecosystems. Seepage storage and slow release can effectively control the runoff of rainwater and realize the urban development mode of natural accumulation, natural infiltration and natural purification. [0003] The important regulating role of urban green space on urban water conservation has attracted the attention of the country. The role of urban green space...

Claims

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Application Information

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IPC IPC(8): G01N15/08
CPCG01N15/0826
Inventor 周建强
Owner 上海绿地环境科技(集团)股份有限公司
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