汶川地震对望月寨滑坡稳定性影响研究
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摘要
"5.12"汶川地震诱发大面积的山体滑坡,直接威胁人类的生命财产安全,但同时也为研究地震对滑坡的影响提供了宝贵的素材。以四川省理县望月寨滑坡为例,在对地震前后滑坡基本特征深入研究的基础上,采用极限平衡法和有限差分法对地震前后该滑坡的稳定性和应力应变特征进行了计算、模拟和对比分析,分析结果与地震前后滑坡的宏观地质现象均具有较高地吻合度。研究成果为深入分析地震对滑坡影响及防灾减灾提供了可靠依据。
"5.12" Wenchuan earthquake induced a large number of landslides,which had directly threaded human lives and property safety.But at the same time,it also provided valuable material to study the impact of earthquakes on the landslide.Taking Wangyuezhai landslide instantiated in Li city of Sichuan Province for example,on the basis of exhaustively mastering the basic characteristics of landslide before and after Wenchuan earthquake,stability and stress-strain features were then calculated and analyzed by limiting equilibrium method and finite difference method,which could analyze landslide's deformation features from the respect of stress-strain.The analytical results are consistent with the macro-geological phenomena before and after the earthquake.These results provide a reliable basis for the future study of the impact of earthquakes on the landslide and geohazard prevention & geoenvironment protection.
"5.12" Wenchuan earthquake induced a large number of landslides,which had directly threaded human lives and property safety.But at the same time,it also provided valuable material to study the impact of earthquakes on the landslide.Taking Wangyuezhai landslide instantiated in Li city of Sichuan Province for example,on the basis of exhaustively mastering the basic characteristics of landslide before and after Wenchuan earthquake,stability and stress-strain features were then calculated and analyzed by limiting equilibrium method and finite difference method,which could analyze landslide's deformation features from the respect of stress-strain.The analytical results are consistent with the macro-geological phenomena before and after the earthquake.These results provide a reliable basis for the future study of the impact of earthquakes on the landslide and geohazard prevention & geoenvironment protection.
引文
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[2]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.
[3]中国建科院.GB50011-2001建筑抗震设计规范[S].北京:中国建筑工业出版社,2001.
[4]柴波,殷坤龙,汪洋,等.基于影响因素分布模型的滑坡稳定性敏感分析[J].岩土力学,2007,28(12):2624-2628.CHAI Bo,YIN Kun-long,WANG Yang,et al.Sensitivity analysis of landslide stability based on distribution models of influencing factors[J].Rock and Soil Mechanics,2007,28(12):2624-2628.
[5]张锐,迟世春.地震加速度动态分布及对高土石坝坡抗震稳定的影响[J].岩土力学,2008,29(4):1072-1076.ZHANG Rui,CHI Shi-chun.Discussion on seismic coefficient of high earth-rock dams and its influence on dam slope seismic stability[J].Rock and Soil Mechanics,2008,29(4):1072-1076.
[6]李远耀,殷坤龙,柴波,等.三峡库区滑带土抗剪强度参数的统计规律研究[J].岩土力学,2008,29(5):1419-1425.LI Yuan-yao,YIN Kun-long,CHAI Bo,et al.Study on statistical rule of shear strength parameters of soil in landslide zone in Three Gorges Reservoir area[J].Rock and Soil Mechanics,2008,29(5):1419-1425.
[7]张雪东,陈剑平,黄润秋,等.用FLAC-3D分析呷爬滑坡变形特征[J].岩土力学,2005,26(1):131-134.ZHANG Xue-dong,CHEN Jian-ping,HUANG Run-qiu,et al.A study of deformation features of Gapa landslide using FLAC-3D[J].Rock and Soil Mechanics,2005,26(1):131-134.
[8]杜景灿,周家骢.岩质古滑坡体稳定性研究——以宝泉抽水蓄能电站龟山古滑坡体为例[J].岩土力学,2005,26(11):1793-1798.DU Jing-can,ZHOU Jia-cong.Stability analysis of ancient rocky slide——Instantiating by Guishan ancient rock slide beside Baoquan Pumped Storage Power Station[J].Rock and Soil Mechanics,2005,26(11):1793-1798.
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