Underground blind ditch drainage system

Abstract

The invention provides an underground blind ditch drainage system which is large in effective drainage section, good in drainage effect and capable of preventing clogging. The underground blind ditch drainage system comprises an underground block broken stone blind ditch, a reinforced concrete drainage culvert pipe which is located in the underground block broken stone blind ditch and stress adjusting cushion layers which are arranged at the bottom of the drainage culvert pipe and at the top of the drainage culvert pipe respectively. The drainage culvert pipe consists of a plurality of culvert pipes and a gap is left between each adjacent culvert pipes. Each adjacent culvert pipes are connected by pervious geotextile and the outside of the pervious geotextile is wrapped with a geogrid. The underground blind ditch drainage system is convenient for construction and has the characteristics of being efficient, reliable, safe, durable and economical. The whole surface of the broken stone blind ditch is pervious, so that underground water is very easy to permeate into the blind ditch. The reinforced concrete drainage culvert pipe is large in effective drainage section, so that the underground water can flow outward along the reinforced concrete drainage culvert pipe.

Description

technical field [0001] The invention relates to a drainage system, in particular to an underground blind ditch drainage system. Background technique [0002] In earthworks, underground drainage blind ditch is a commonly used engineering measure to control groundwater level during construction and use. Conventional underground drainage blind ditch is generally made of crushed stone or flaked stone, and a certain thickness of crushed stone filter layer is set on the upper part and surrounding area, and it is usually wrapped with non-woven geotextile. Its defect is that the effective drainage area ratio of block gravel blind ditch is relatively low, the precipitation area is large and the design flow is large in large-scale earthworks, so that the design section of pure block gravel blind ditch is very large, and materials are obtained locally at the stone source. In difficult projects, transportation will be difficult and the project cost will be high. SUMMARY OF THE INVENT...

AI Technical Summary

Problems solved by technology

Its defect is that the effective drainage area ratio of block gravel blind ditch is relatively low, the precipitation area is large and the design flow is large in large-scale earthworks, so that the design section of pure block gravel blind ditch is very large, and materials are obtained locally at the stone source. In difficult projects, transportation will be difficult and the project will be expensive

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