Multifunctional bioretention pond and construction method thereof

Abstract

The invention provides a multifunctional bioretention pond and a construction method thereof. The bioretention pond comprises a planting soil layer, a sand layer, a gravel layer and a drainage pipe culvert which are sequentially arranged from top to bottom, wherein the drainage pipe culvert comprises an outer wall, a water outlet and a seepage pipe; the drainage pipe culvert is centrally buried in the gravel layer, and the top of an overflow device penetrates through the sand layer and the planting soil layer; the bottom of the overflow device is connected with the drainage pipe culvert; and the overflow device comprises a top cap, an inner pipe, a supporting rod, an outer sleeve, a primary collecting pipe and a secondary collecting pipe. The bioretention pond provided by the invention can be prefabricated and assembled, the site construction is simple and rapid, the maintenance is time-saving and labor-saving, the air permeability and permeability of soil are improved, seepage rainwater and part of rainwater exceeding the standard can be purified, excessive rainwater can be rapidly discharged, and meanwhile, a unique landscape is created by virtue of a unique appearance structure. The multifunctional bioretention pond can be applied to municipal roads, parks, buildings and residential areas.

Description

technical field [0001] The invention relates to the technical field of sponge city construction, in particular to a multifunctional biological retention pond and a construction method thereof. Background technique [0002] Since the 21st century, with the sustained and rapid economic development, my country's urbanization has also made great progress. However, the natural urban surface is replaced by impermeable hard materials in residential areas, which changes the topographic structure of the surface and has a bad impact on the natural ecological environment. Problems such as urban flood disasters and ecological environment deterioration have become increasingly prominent. Based on this, the construction of sponge city is an important measure to solve the city's current coexistence of drought and flood, serious non-point source pollution, and deterioration of the ecological environment, and to build an ecological rainwater management system. The bioretention pond is one o...

AI Technical Summary

Problems solved by technology

[0003] The main structure of the bioretention tank is composed of aquifer, planting soil layer, sand layer and drainage layer. The planting soil is often made of local soil, which has poor air permeability and permeability, and rainwater cannot be purified and flowed out quickly; commonly used Generally, only one large overflow port is set in the bioretention tank, and the excess rainwater is concentrated and drained, and the drainage speed is slow, so it cannot be effectively purified, and the concrete construction time of the overflow well with a larger diameter is longer, the project implementation is complicated, and the economy is poor ;The larger overflow cannot create a unique landscape, and it is out of place with the surrounding buildings or scenery

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