摘要
地震和暴雨同时作用是自然界中引发边(滑)坡灾害的一种极端工况。在分析地震和暴雨同时作用于边(滑)坡的稳定性时,现行规范只能采用将地震及暴雨影响简单叠加的方法。采用GEO-SLOPE软件,对川藏公路和西攀高速公路上的典型边(滑)坡工点,采用动力有限元与极限平衡理论相结合的方法,分析它们在地震和暴雨共同作用下的稳定性,探索采用将地震与暴雨工况简单叠加,以及地震和暴雨耦合分析这两种方法评价边(滑)坡稳定性的差别,并对现行规范计算方法的适用性作出评价。结果表明,地震和暴雨的耦合作用对边(滑)坡稳定性的影响大于地震、暴雨单独作用的叠加对边(滑)坡稳定性影响。
The joint effect of earthquake and rainstorm is the extreme condition which causes landslide in nature. The current codes to evaluate the impacts of both earthquake and rainstorm on slope stability are just a simple addition of the two factors. By using the GEO-SLOPE software and employing dynamics element infinite and limit equilibrium theory, this paper evaluates the stability of the typical slope sites along the Sichuan-Tibet highway and Xichang-Panzhihua freeway under the coupling of earthquake and rainstorm, in order to find the difference of simple addition and the coupling analysis of earthquake and rainstorm, and also evaluates the applicability of regular computational methods. Research has found that the coupling of earthquake and rainstorm has more serious impacts to slope stability than the simple addition of impact of earthquake and rainstorm alone.
出处
《水土保持通报》
CSCD
北大核心
2009年第3期178-182,共5页
Bulletin of Soil and Water Conservation
基金
国家重点基础研究发展计划(973计划)"汶川地震次生山地灾害形成机理与风险控制"(2008CB425802)
四川省交通厅科技项目"山区高速公路地质灾害信息系统及减灾决策技术"(SC20060090)
西藏自治区交通厅科技项目"川藏公路通麦至105道班地震诱发公路地质灾害机理及对策研究"(XZJE2006-01)
关键词
边坡
滑坡
地震
暴雨
稳定性评价
slope
landslide
earthquake
rainstorm
stability evaluation
