Rainwater garden flood prevention device

Abstract

The invention relates to a rainwater garden flood prevention device comprising a planting layer, a transition layer and a gravel layer sequentially from top to bottom, and a rainwater circulation device is arranged in the planting layer. The planting layer is formed by laying denitrification filter material. A filter layer is formed by laying coarse sand. The gravel layer is formed by laying gravel and pebbles. An aquifer is arranged under the gravel layer and comprises an upper concrete layer, a lower concrete layer and concrete columns arranged between the upper concrete layer and the lowerconcrete layer. An interlayer is poured between the upper concrete layer and the lower concrete layer. A reservoir is formed between the upper concrete layer and the interlayer. Multiple rows of through holes are formed in the upper portion of the upper concrete layer. A plurality of rainwater wells are evenly formed in the planting layer. The multiple rows of through holes are formed in the upperportion of the upper concrete layer, and vertically arranged water passing pipes are arranged in each row of through holes. The rainwater circulation device is arranged on the upper portion of a sludge storage pool and comprises a water return pipe, a water return pump and a water return pipe network. The rainwater garden flood prevention device has the effect that flood is prevented in a rainwater garden.

Description

technical field [0001] The invention relates to the technical field of rain gardens, in particular to a rain garden flood prevention device. Background technique [0002] The rain garden is a naturally formed or artificially excavated shallow concave green space, which is used to gather and absorb rainwater from the roof or the ground. Through the comprehensive action of plants and sand, the rainwater is purified and gradually infiltrated into the soil, conserving groundwater, or Make it replenish urban water such as landscape water and toilet water. It is an ecologically sustainable rainwater control and rainwater utilization facility. [0003] In the prior art, the authorized announcement number that can be referred to is the Chinese patent of CN 106121008 B, which discloses an energy-saving urban rainwater garden, including a vegetation planting system, a water storage system and a drainage system. The planting system includes a vegetation layer And the plain soil ramme...

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Problems solved by technology

[0004] The above-mentioned existing technical solutions have the following defects: the prior art realizes the collection and recycling of rainwater by setting up a water storage system and a drainage system. The rainwater gardens are all in the form of open low-lying land, and the rainwater is presented in a natural stagnant state. The amount of retained rainwater in the section of the depression is extremely limited, and waterlogging is prone to occur, which not only affects the growth of green plants, but also affects the landscape effect; therefore, how to improve the water storage capacity of the rain garden and ensure the normality of plants is a problem that needs to be solved

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