Single-slope drainage system in seasonal water immersion roadbed

Abstract

The invention provides a single-slope drainage system in a seasonal water immersion roadbed. The single-slope drainage system comprises combined impermeable layers, pipe type sewers, upward oblique one-way drainage pipes, step type earthwork standard rooms and a sand-gravel cushion, and especially, each upward oblique one-way drainage pipe comprises an upward oblique drainage pipe body, a trumpet-shaped water outlet and a one-way drainage valve body, wherein holes are formed in the top of the upward oblique drainage pipe body, one end of the upward oblique drainage pipe body is communicated with a sewer drainage pipe, and the other end of the upward oblique drainage pipe body obliquely penetrates through the corresponding side-slope impermeable layer. The impermeable requirement and the drainage requirement of the water immersion roadbed are taken into considered through the combined use of the impermeable layers, the sewers and the drainage pipes; accumulated water on the sides of the roadbed is effectively prevented from flowing backward into a roadbed body by arranging the novel one-way drainage valve bodies; the novel one-way drainage valve bodies have the advantages of being long in sealing distance, good in drainage effect, and capable of playing very good waterproof and drainage effects on the seasonal water immersion roadbed.

Description

technical field [0001] The invention relates to the field of roadbed drainage systems, in particular, it provides a one-way drainage system for roadbed interiors in seasonally flooded areas. Background technique [0002] In the past two decades, China's overseas road construction business in Africa, Southeast Asia and other regions has developed rapidly. In the typical tropical rainforest areas of Africa and Southeast Asia, the groundwater table is high, the water content is high, and the soft soil is widely distributed and rich in organic matter. In many areas, the annual rainfall is high and the rainfall is concentrated in the rainy season, so that the lower part of the roadbed is either soaked in water for a long time or seasonally, and the wet and dry conditions of the roadbed change greatly. When the subgrade drainage facilities are improperly set up, or when the rainfall is greater than its drainage capacity, it will cause rainwater to collect on both sides of the sub...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a one-way internal drainage system for subgrades used in seasonally flooded areas, so as to solve the problem of fast drainage inside subgrades in seasonally flooded areas and prevent backflow of roadside water

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