京原铁路山区段堤坡坍塌水害成因分析及防治

Analysis and prevention of water damage caused by embankment slope collapse in mountainous areas of the Jingyuan Railway

本文以京原铁路K88+550—K88+580段为例,分析了该段铁路路堤坍塌的原因并提出了相应的整治措施,得到了以下结论:根据线路两侧地形量测结果,地表汇水极易在K88+550处形成渗流通道,软化线路左侧坡体。京原线K88+700—K88+550范围线路高程降低,易产生汇水,由于“7·29”特大暴雨影响,大量地表水汇集,部分下渗至路堤边坡,致坡体含水量上升,含水率趋近饱和,自重增加,岩土体强度降低,加之前期开挖声屏障基础对边坡坡体产生一定扰动,多重因素叠加最终导致路堤边坡失稳发生滑动破坏。研究结果可为同类地区的工程建设及设计提供相应参考。

This article takes the K88+550—K88+580 section of the Jingyuan Railway as an example to analyze the reasons for the collapse of the railway embankment in this section and propose corresponding remediation measures.The following conclusions are drawn:Based on the terrain measurement results on both sides of the line,surface water is prone to form a seepage channel at K88+550,softening the left slope of the line.The elevation of the line in the range from K88+700 to K88+550 of the Jingyuan Line decreases,which is easy to generate water catchment.Due to the impact of the“7·29”extremely heavy rainstorm,a large amount of surface water collects,and some of it infiltrates into the embankment slope,causing the water content of the slope to rise,the water content to become saturated,the self weight to increase,and the strength of the rock and soil mass to decrease.In addition,the excavation of the sound barrier foundation in the early stage has a certain disturbance to the slope,and the superposition of multiple factors eventually leads to the instability of the embankment slope and sliding failure.The research results can provide corresponding references for engineering construction and design in similar regions.