软式透水管整治兰新铁路路基冻害效果研究

摘要

路基冻害严重影响了铁路提速,相关部门曾用过一些措施处理,但效果不明显。介绍以新型土工合成材料软式透水管整治兰新铁路路基冻害,通过对现场实测路基含水率、路基冻胀量及路基地温变化的分析表明,软式透水管在路基中具有通风、疏干排水等的作用,在抑制路基冻胀方面的效果很显著。%Subgrade freezing damage seriously influenced railway speed-raising.The corresponding department ever took some measures to treat the damage,but the effect was not satisfactory.In this paper,flexible permeable hose made by the new type geo-synthetics is introduced to treat subgrade freezing damage in Lanzhou-Xinjiang Railway.Through analyzing the measured water content,frost heaving amount and ground temperature change in relation to subgrade,it is shown that flexible permeable hose works for good ventilation and water drainage in subgrade,which has significant effect in inhibiting freezing damage.