小浪底东苗家滑坡体原始状态稳定性分析
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摘要
针对东苗家滑坡体的地质条件,根据其滑坡体变形特征及多种复杂变形组合破坏形式,选用Sarma法对东苗家滑坡体在原始状态的稳定性进行分析和评价。结果表明:东苗家滑坡体在自然状态下基本处于稳定状态;在Ⅶ度地震烈度条件下,该滑坡体将会失稳;地下水位的变化对滑坡体稳定性具有一定影响,但不起主要作用。
Aiming at the geological conditions of Dongmiaojia landslide,according to its landslide deformation characteristics,as well as a variety of complex deformation and combination in the form of damage,Sarma method is chosen to analyze and evaluate the stability of Dongmiaojia landslide under original state.Results show that Dongmiaojia landslide in the natural state is basically in a steady state.Accordance with the provision of Seismic Design of Buildings,landslide district has aⅦ degrees fortification intensity and the landslide will be instability at the time ofⅦ degrees seismic.It proves that the impact of seismic activity on landslide stability is significantly.Changes in groundwater level has a certain influence on the stability of landslide,but can not afford a major role.Conclusions has reference significance on the long-term stability evaluation of Dongmiaojia landslide.
Aiming at the geological conditions of Dongmiaojia landslide,according to its landslide deformation characteristics,as well as a variety of complex deformation and combination in the form of damage,Sarma method is chosen to analyze and evaluate the stability of Dongmiaojia landslide under original state.Results show that Dongmiaojia landslide in the natural state is basically in a steady state.Accordance with the provision of Seismic Design of Buildings,landslide district has aⅦ degrees fortification intensity and the landslide will be instability at the time ofⅦ degrees seismic.It proves that the impact of seismic activity on landslide stability is significantly.Changes in groundwater level has a certain influence on the stability of landslide,but can not afford a major role.Conclusions has reference significance on the long-term stability evaluation of Dongmiaojia landslide.
引文
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[2]王育林,陈凤云,齐华林,等.危岩体崩滑对航道影响及滑坡涌浪特性研究[J].中国地质灾害与防治学报,1994,5(3):95-100.
[3]徐瑞春,徐同海.清江隔河岩水库杨家槽滑坡稳定性工程地质研究[J].地质力学学报,1999,5(2):1-9.
[4]马水山,王志旺,张漫.滑坡监测资料的因子分析[J].岩石力学与工程学报,2002,21(7):1003-1006.
[5]张保军,李亦明,马水山.从隔河岩水利枢纽库岸稳定性监测实施谈长江三峡库岸滑坡安全监测[J].岩石力学与工程学报,2001,20(s1):1658-1662.
[6]王志旺,杨健,张保军,等.水库库岸滑坡稳定性研究[J].岩土力学,2004,25(11):1837-1840.
[7]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.
[8]熊将,王涛,盛谦.库区边坡稳定性计算的改进Sarma法[J].岩土力学,2006,27(2):323-326.
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