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Water-gas communication type low-impact development paving structure

A low-impact development and water-gas technology, applied in water supply devices, drainage structures, combined devices, etc., can solve the problems of easy clogging of pores, inapplicability, lack of water purification and reuse functions, etc., and achieve strong adsorption capacity and stability Sex, good adsorption and filtration performance, high-quality adsorption and filtration effect

Active Publication Date: 2022-04-05
CHINA ACAD OF TRANSPORTATION SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current permeable pavement structures generally have problems such as easy clogging of pores, lack of water purification and reuse functions, and are not suitable for use in northern regions due to frost heave and other reasons.

Method used

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  • Water-gas communication type low-impact development paving structure
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  • Water-gas communication type low-impact development paving structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A water-air-connected low-impact development pavement structure includes several water-air-connected structural units, and each water-air-connected structural unit is composed of grid permeable bricks, transitional leveling layers, adsorption filter layers, biodegradable layers, and skeleton aquifers. It consists of five layers of horizontal structure, water and air inlet pipe and cone barrel exhaust pipe.

[0038] The conical barrel exhaust pipe adopts a conical barrel-shaped structure with a narrow top and a wide bottom. flush with the bottom of the biodegradable layer. When it rains, the cone barrel exhaust pipe also plays the role of quick drainage of rainfall. After the rain stops, when there is only air circulation, according to the principle of aerodynamics, the air flow rate in the cone barrel exhaust pipe with a narrow top and a wide bottom shows an increasing trend from bottom to top, and according to the Bernoulli equation, the pressure is getting lower and ...

Embodiment 2

[0042] A water-air-connected low-impact development pavement structure, which is installed in a parking lot in a highway service area in East China. Each water-gas connected structural unit includes grid permeable bricks, transitional leveling layers, adsorption filter layers, and biodegradable layers. , skeleton aquifer, water vapor introduction pipe and cone barrel exhaust pipe.

[0043] The size of the square grid permeable brick is 30cm×30cm, with construction waste, coal gangue, fly ash, etc. as the aggregate, the water-cement ratio is 0.3-0.5, the aggregate particle size is 5-10mm, and the strength is 30-40Mpa. Each grid permeable brick is provided with a plurality of circular transparent meshes, which are filled with nutrient soil mixed with humus soil and volcanic ash, and ryegrass is planted inside.

[0044] The thickness of the transition leveling layer is 5cm, filled with natural gravel, hardened cement mortar and local soil.

[0045] The adsorption filter layer is...

Embodiment 3

[0052] A water-gas communication type low-impact development pavement structure as described in Example 2, wherein the biodegradable layer is filled with slow-release degradable balls, and the slow-release degradable balls are externally molded with HDPE to form a porous spherical shell, with multiple circular hollow. Each porous spherical shell is equipped with one or more microbial bacterial packages wrapped by water-soluble membranes. The microorganism adopts the compound bacterial agent of Bacillus subtilis and Bacillus. The water-soluble film is made of polyvinylidene fluoride, N-methylpyrrolidone, and N-vinylpyrrolidone. It can gradually dissolve in rainwater, gradually release spore-like microorganisms, and evenly disperse into the biodegradable layer and attach to the porous layer. In the support balls and wood chips of the structure, the main pollutants of rainwater are biodegraded and removed.

[0053] This experiment adopts the method of artificially simulating ra...

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Abstract

The invention relates to a water-gas communication type low-impact development paving structure. The water-gas communication type low-impact development paving structure comprises a water-gas communication module and a water storage module. The water-gas communication module comprises grid water permeable bricks, a transition leveling layer, a filtration and adsorption layer, a biodegradation layer, a framework water storage layer and a catchment ditch which are sequentially arranged from top to bottom; the water storage module comprises a water storage tank, a water pump, an observation disc and the like. According to the water-air communication type low-influence development pavement structure, rapid guide and drainage of rainwater runoff can be achieved, a large number of pollutants in the rainwater runoff are intercepted, adsorbed, filtered and degraded, the purified runoff is stored and used for later greening irrigation, air pollution such as automobile exhaust and haze can be purified, and the environment is protected. The method is of great significance in water environment restoration, air purification and rainwater recycling.

Description

technical field [0001] The invention relates to the technical field of urban water environment treatment, in particular to a water-air connection type low-impact development pavement structure. Background technique [0002] In recent years, problems such as the "heat island effect" of domestic cities, waterlogging caused by heavy rains, and the depletion of groundwater resources have seriously affected urban ecological construction and sustainable development. Carrying out the construction of "sponge city" is an important strategic measure to solve the above problems. Sponge city construction is a systematic project integrating planning, design, construction and operation management. An important technical means in the implementation process is the use of permeable pavement systems. The permeable pavement system is an important source control technology under the concept of "sponge city", and has been widely used in parks, courtyards, parking lots, sidewalks, squares, light...

Claims

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Application Information

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IPC IPC(8): E01C11/22E01C5/06E01C11/26E01C9/00E03F3/02E03F3/04E03F5/10H02S10/12C02F9/14B01D50/60B01D53/84B01D53/44B01D53/48B01D53/54
CPCY02E10/50Y02A50/20Y02A50/2351
Inventor 刘学欣宋神友孔亚平金文良陶双成宁进进陈瑶熊新竹
Owner CHINA ACAD OF TRANSPORTATION SCI
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