Rainwater garden

Abstract

The rainwater garden comprises a foundation pit which is formed by sinking downwards in the surface of foundation soil, and a planting soil layer, a filler layer and a gravel layer are sequentially laid in the foundation pit from top to bottom; the foundation soil forms a dam body at the edge of the foundation pit and is used for preventing surface water from entering the foundation pit; the foundation soil is provided with a drainage groove on the outer side of the dam body, and the groove bottom of the drainage groove is provided with a drainage pipe connected to the gravel layer; a liftable drainage frame is inserted into the drainage groove and comprises an outer side plate with a filter screen, a top plate and an inner side plate; the inner groove wall of the drainage groove is sunken inwards to form a groove, and a filter plate and a movable drainage plate are arranged at a groove opening of the groove; when the drainage frame rises and the inner side plate crosses the groove opening of the groove, the drainage plate can extend into the drainage groove, and surface water is led into the groove and discharged from the filter plate. The method has the beneficial effects that surface water with large silt content can be effectively treated, and the drainage capacity is improved.

Description

technical field [0001] The invention relates to a rainwater garden, which is mainly applied in the technical field of rainwater control in sponge cities. Background technique [0002] Rain gardens are naturally formed or artificially excavated shallow concave green spaces that are used to gather and absorb rainwater from roofs or ground, purify the rainwater through the combined action of plants and sand, and make it gradually penetrate into the soil, conserving groundwater, or It can be used to supply urban water such as landscape water and toilet water. It is an ecologically sustainable rainwater control and rainwater utilization facility. Its main functions are to reduce peak flow through stagnation, reduce rainwater discharge to protect downstream pipelines, structures and water bodies, use plant interception and soil infiltration to purify rainwater and reduce pollution, make full use of runoff rainfall to conserve groundwater, and also treat rainwater after treatment....

AI Technical Summary

Problems solved by technology

[0004] Although the rain garden of this application can filter rainwater and surface water to a certain extent through drainage channels and filter screens, when the rainfall and rainfall intensity are large, the surface water will wash away the foundation soil. It will make the sediment content higher, and the filtering effect of the filter at this time is insufficient, and the sediment is easy to deposit in the drainage tank, causing a certain degree of blockage in the drainage tank, which weakens the ability of the rain garden to prevent waterlogging

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