三维网垫植草护坡坡体稳定性数值分析  

Numerical analysis on general stability of 3-D vegetation mattress of slope protection

作　　者：肖成志[1,2] 李雨润[1,2] 王朋[1] 刘晓朋[1] 

机构地区：[1]河北工业大学土木工程学院,天津300132 [2]河北工业大学河北省土木工程技术研究中心,天津300132

出　　处：《人民长江》2011年第9期76-80,共5页Yangtze River

基　　金：国家自然科学基金项目(509090321);河北省教育厅项目(2007431);博士后基金项目(20070420807)

摘　　要：三维土工网垫植草护坡作为一种重要的生态防护形式而广泛用于岩土工程领域。基于有限元软件M I-DAS-GTS,结合护坡体浅层土体力学性能,建立了降雨渗流情况下采用三维网垫植草护坡的路基和路堑边坡的有限元模型,进而模拟浅层和整体坡体在降雨渗流情况下的稳定性。结果表明,三维网垫植草护坡使路基和路堑边坡坡体的安全系数提高了20%左右,三维网垫护坡起到了很明显的应力消散作用,使得坡体在软弱夹层处的变形显著减少,进而有助于减少溜方或部分坡体滑塌等边坡灾害。3-D vegetation mattress for slope protection has been widely used in geotechnical engineering as an important ecological protection measure.Based on FEM software of MIDAS-GTS,combining with mechanical properties of shallow soil,we establish a FEM model of subgrade and cutting slope protected by 3-D vegetation mattress under rainfall infiltration condition;furthermore,we simulate shallow and general slope stability under rainfall infiltration condition.The results show that safety factor of the slope increases by 20% due to the protection of vegetation mattress,and the vegetation mattress plays a role of stress dispersion,resulting in a decreasing of displacement of soft intercalations,therefore,partial destruction of slopes can be avoided to a certain extent.

关 键 词：三维网垫植草护坡 路基 路堑 边坡稳定性 安全系数 有限元 

分 类 号：TU47[建筑科学—结构工程]