摘要
以湖南某高速公路左侧山体滑坡为例,采用有限差分法对边坡稳定性进行评估。同时,结合现场深层测斜与地表位移监控,研究滑坡发生的原因,并提出切实可行的处治方案。研究表明:该滑坡Ⅱ区(K0+320~K0+380段)前缘坡脚部分岩土已滑出坡面,坡面的部分框架梁已开裂、后缘水沟及坡开裂严重,是主要滑动区域。根据监测成果及现场滑塌情况判断,该滑坡为小型浅层牵引式土质滑坡。深层测斜结果是确定滑动面的重要依据,是滑坡防治的重要基础,在边坡控制性工程中,应尽可能地进行测斜工作。岩性以全风化板岩为主的边坡发生滑塌,其影响范围广、下滑力大、潜在滑动面深厚且可能存在多个滑动面。对于滑动范围广、滑体规模大、滑动面深厚的边坡应采用“分区域、分级、分期”的动态处治方法,应采用支挡与卸载相结合的手段进行处治。
Taking a landslide on the left side of a highway in Hunan as an example,the finite difference method is used to evaluate the stability of the slope.At the same time,combined with on-site deep inclination measurement and surface displacement monitoring,the causes of landslides are studied and feasible treatment plans are proposed.Research has shown that:the rock and soil at the foot of the front edge slope in the landslide zoneⅡ(K0+320~K0+380 section)have slid out of the slope surface,some frame beams on the slope surface have cracked,and the rear edge ditch and slope have severely cracked,making it the main sliding area.Based on the monitoring results and on-site landslide situation,it is determined that the landslide is a small shallow traction type soil landslide.The results of deep slope measurement are an important basis for determining the sliding surface and an important foundation for landslide prevention and control.In slope control engineering,slope measurement should be carried out as much as possible.The slope with completely weathered slate as the main lithology experiences collapse,which has a wide range of impact,large sliding force,deep potential sliding surfaces,and may have multiple sliding surfaces.For slopes with wide sliding range,large sliding mass scale,and deep sliding surface,a dynamic treatment method of"zoning,grading,and staging"should be adopted,and the combination of support and unloading should be used for treatment.
作者
张笑
金宇轩
巢万里
ZHANG Xiao;JIN Yuxuan;CHAO Wanli(Hunan Communications Research Institute Co.,Ltd.,Changsha,Hunan 410114,China;Hunan Provincial Key Laboratory of Traffic Construction Engineering,Changsha,Hunan 410114)
出处
《公路工程》
2025年第4期124-131,共8页
Highway Engineering
基金
湖南省交通科技项目(202238)。
关键词
滑坡
边坡支护
抗滑桩
数值模拟
有限差分法
landslide
slope support
anti-slidepile
numerical simulation
finite difference method
