斜坡高填方路堤开裂病害及稳定性研究  

Study on Crack Disease and Stability of Slope High-fill Embankment

作　　者：郭志边 杨伟红 程乾 GUO Zhibian;YANG Weihong;CHENG Qian(91053 Troops,Beijing 100070,China;Inspection and Certification Co.,Ltd.,MCC,Beijing 100088,China)

机构地区：[1]91053部队,北京100070 [2]中冶检测认证有限公司,北京100088

出　　处：《路基工程》2022年第4期223-228,共6页Subgrade Engineering

摘　　要：以多丰铁路某段斜坡高填方路堤开裂病害为研究对象,对路堤外观质量、填料内部质量及排水沟进行了检测;运用FLAC3D有限差分数值模拟软件,对4种工况下路堤的稳定性进行研究。结果表明:路堤病害产生的主要原因是排水沟及天沟施工滞后,排水不畅,靠山侧坡脚产生积水,进而渗透到路堤,增大了填料的含水率,降低了土体抗剪强度,增大了下滑力,导致路基坡脚应力集中,致使路堤沉降和边坡坡脚开裂,路堤稳定性安全系数不满足要求,采取整治措施后,保证了运营安全。Taking the cracking disease of high-fill embankment on a section of slope of Duofeng Railway as the research object,the embankment appearance quality,internal quality of filler and drainage ditch were detected.By using the finite difference numerical simulation software FLAC3D,the stability of embankment under four working conditions was studied.The results show that the main causes of embankment diseases are the lagging construction of drainage ditch and gutter,poor drainage,water generated at the foot of the slope at the backside of the mountain,and then infiltrated into the embankment,increasing the moisture content of the filler,reducing the shear strength of the soil,increasing the sliding force,leading to the concentration of stress at the foot of the embankment,resulting in embankment settlement and slope foot cracking.The safety factor of embankment stability does not meet the requirements,After taking remediation measures,operation safty is ensured.

关 键 词：斜坡地区 高填方路堤病害 现场调绘 病害成因 稳定性评估 

分 类 号：U416.1[交通运输工程—道路与铁道工程]