某库区料场高边坡全过程稳定性评价
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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 be 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.
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 be 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.
引文
[1]王岩.MIDAS_GTS在土质边坡稳定性分析中的应用[J].科技创新导报,2011,20:138-139.
[2]宋云连.薛家湾开源路高路堑边坡工程稳定性的三维有限元分析[J].地质灾害与环境保护,2008,19(4):87-91.
[3]梁燕.优化方法在库岸斜坡稳定性评价中的应用[J].水文地质工程,2009,6.
[4]刘新喜.库水位骤降时的滑坡稳定性评价方法研究[J].岩土力学,2005,26(9):1427-1436.
[5]帅红岩.Midas/GTS软件在边坡三维稳定分析中的应用[J].地质灾害与环境保护,2009,20(3):104-107.
[6]肖成志,李雨润,王朋,等.三维网垫植草护坡坡体稳定性数值分析[J].人民长江,2011,42(9):76-80.
[7]魏兴龙,左军成,段爱华.开口管桩竖向承载力分析[J].人民长江,2011,42(11):32-34.
[8]赵尚毅,郑颖人,时卫民,等.用有限元强度折减法求边坡稳定安全系数[J].岩土工程学报,2002,24(3):343-346.
[9]陈祖煜.土质边坡稳定分析——原理、方法、程序[M].北京:中国水利水电出版社,2003.
[2]宋云连.薛家湾开源路高路堑边坡工程稳定性的三维有限元分析[J].地质灾害与环境保护,2008,19(4):87-91.
[3]梁燕.优化方法在库岸斜坡稳定性评价中的应用[J].水文地质工程,2009,6.
[4]刘新喜.库水位骤降时的滑坡稳定性评价方法研究[J].岩土力学,2005,26(9):1427-1436.
[5]帅红岩.Midas/GTS软件在边坡三维稳定分析中的应用[J].地质灾害与环境保护,2009,20(3):104-107.
[6]肖成志,李雨润,王朋,等.三维网垫植草护坡坡体稳定性数值分析[J].人民长江,2011,42(9):76-80.
[7]魏兴龙,左军成,段爱华.开口管桩竖向承载力分析[J].人民长江,2011,42(11):32-34.
[8]赵尚毅,郑颖人,时卫民,等.用有限元强度折减法求边坡稳定安全系数[J].岩土工程学报,2002,24(3):343-346.
[9]陈祖煜.土质边坡稳定分析——原理、方法、程序[M].北京:中国水利水电出版社,2003.
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