某库区料场高边坡全过程稳定性评价  

Stability evaluation on high slope of a material field in a reservoir area from excavation to operation

作　　者：朱义欢[1] 邵国建[1] 李昂[1] 苏静波[2] 

机构地区：[1]河海大学力学与材料学院工程力学系,江苏南京210098 [2]河海大学港口海岸与近海工程学院,江苏南京210098

出　　处：《人民长江》2012年第3期80-83,103,共5页Yangtze River

基　　金：国家自然科学基金项目(50978083)

摘　　要：针对某一库区层状料场的岩质高边坡,考虑高边坡的复杂地质条件以及料场的实际开挖过程,基于MI-DAS/GTS建立了有限元数值计算模型。在进行三维非线性数值模拟时,计入开挖卸荷、不同蓄水位和降雨以及地震荷载等因素对高边坡的变形、应力和稳定性的影响。计算结果表明,各工况下塑性区均属浅表塑性区,边坡整体稳定性良好,且开挖对边坡的稳定性有较明显的改善。研究结果为全面评价该边坡料场的安全稳定性提供了理论依据。In the light of complicated conditions and the excavation process of a high rocky slope of a layered material field in a reservoir area, FEM mathematical calculation model based on MIDAS/GTS is established. In the 3D nonlinear calculation, the influences of slope excavation unloading, different water levels, rainfall and seismic load on deformation, stress and stability state of the slope are studied. The results show that the plastic zones of the slope under different operation conditions can he categorized as shallow plastic zone, the stability state of the slope is in good condition, and the excavation can improve the stability state of the slope. The research provides a theoretical foundation for the overall stability evaluation of the high slope.

关 键 词：边坡稳定 开挖卸荷 蓄水位 地震荷载 MIDAS/GTS 强度折减法 

分 类 号：P642.2[天文地球—工程地质学]