水位升降速度及降雨对膨胀岩边坡稳定性的影响  

Study on influence of water level variation velocity and precipitation on stability of expansive rock slope

作　　者：董艳华[1,2] 程壮[3,2] 党莉[3,2] 宛良朋[1,2] 

机构地区：[1]三峡大学水利与环境学院,湖北宜昌443002 [2]三峡大学三峡库区地质灾害教育部重点实验室,湖北宜昌443002 [3]三峡大学土木与建筑学院,湖北宜昌443002

出　　处：《人民长江》2012年第13期84-87,共4页Yangtze River

基　　金：国家自然科学基金项目(50909052;50779029);三峡大学2011年研究生科研创新基金(2011CX010)

摘　　要：为研究水对膨胀岩边坡失稳的影响,以南水北调中线工程河南安阳第一施工标段渠坡为工程实例,利用GEO-SLOPE软件中的seep/w模块和slope/w模块,研究在蓄水条件下,不同水位升降速度及降雨对膨胀岩边坡渗流场和稳定性的影响。结果表明:水位变化速度对膨胀岩边坡的渗流场有较大影响,较大水位上升速度对膨胀岩边坡稳定性有利,但过快的水位下降速度不利于膨胀岩边坡的稳定性,降雨会显著降低膨胀岩边坡的稳定性。Water has a comparably large influence on engineering properties of expansive rock and most failure of expansive rock slopes occurs at a high water level or in the period of rainfall. Taking the first bidding construction section of the Middle Route Project of S - N Water Diversion in Anyang City of Henan Province as practical case and using the modules of seep/w and slope/w in GEO - SLOPE, we present a study on the influence of water level variation velocity and precipitation on the seepage fields and stability of expansive rock slope. The study results show that the water level variation velocity and precipitation have a large influence on the transit seepage fields of expansive rock slope, higher water level rising velocity is favorable to the stability of expansive rock slope while larger dropdown velocity is unfavorable to it, the precipitation can obviously reduce the stability of rock slope.

关 键 词：渠道 水位升降 降雨 渗流场 稳定性 膨胀岩边坡 

分 类 号：P642.2[天文地球—工程地质学]