Roadbed drainage device and roadbed structure

Abstract

The roadbed drainage device comprises a drainage base plate, a waved plate is laid on the upper surface of the drainage base plate, geotechnical cloth is laid on the waved plate, the geotechnical cloth is attached to the wave crest position of the upper surface of the waved plate, and a ventilation space is formed between other parts of the upper surface of the waved plate and the geotechnical cloth. The roadbed drainage device is good in drainage effect and good in roadbed humidity control effect.

Description

technical field [0001] The invention relates to the technical field of roadbed humidity control, in particular to a roadbed drainage device and a roadbed structure. Background technique [0002] The statements herein merely provide background information related to the present invention and do not necessarily constitute prior art. [0003] During the roadbed construction and open traffic service period, affected by groundwater, atmospheric precipitation, land water evaporation, pavement structure permeation and traffic load, the humidity of the roadbed is constantly changing, and the humidity during service often exceeds the optimal moisture content, resulting in wet roadbeds. The mechanical properties gradually decline, further leading to the frequent occurrence of road engineering diseases such as embankment subsidence and pavement cracking, and the reduction of road life. Good subgrade support and its long-term stability depend primarily on the control of the subgrade mo...

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Problems solved by technology

Among them, the laying of graded crushed stone drainage layer has the disadvantages of high production and transportation costs, easy clogging, and only relying on gravity potential energy drainage in saturated roadbeds; the method of embedding geotextiles is low in cost and not easy to clog, but the inventor found that embedding geotextiles It has the disadvantage of small drainage boundary of geotextile. The geotextile inside the roadbed is in close contact with the soil of the roadbed. Only the exposed geotextile part of the road shoulder can realize water migration and removal through the difference in suction between the atmosphere and the interior of the roadbed. The drainage effect is poor and the control of humidity Insufficient capacity, and the traditional method of directly laying geotextiles has the defects of poor compressive performance, easy deformation or slippage of geotextiles

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