有限元局部强度折减法在反倾岩质库岸边坡中的应用  

Application of Anti-dip Rock Bank Slope Based on Limit Element Local Strength Reduction Method

作　　者：陈园[1] CHEN Yuan(Xinjiang Institute of Water Resources and Hydropower Survey and Design,Urumqi 830000,China)

机构地区：[1]新疆水利水电勘测设计研究院,乌鲁木齐830000

出　　处：《水利科技与经济》2018年第7期55-59,共5页Water Conservancy Science and Technology and Economy

摘　　要：不同类型的边坡有着不同的特点,边坡的变形方式不同导致其破坏方式也不同。对于岩土体结构,岩土体弱化性能有很大差异,如果对所有岩土体进行全局折减,势必会对坡体的稳定性分析造成很大的误差。利用Phase2分析3种不同工况下库岸边坡的稳定性,当对消落带和强风化层进行局部强度折减时,其计算结果与实际监测数据相吻合。由于库水位的升降变化,消落带在长期干湿循环作用下,岩土体结构发生变化,强度降低,岸坡内发生剪切破坏和张拉破坏的区域范围不断增发,由坡脚处逐渐向上延伸,直至崩滑体后缘。Different types of slopes have different characteristics. Different deformation modes of slopes lead to different failure modes. For the structure of rock-soil. The weakening performance of rock-soil is very different. If rock-soil mass is reduced globally. The stability of slope will cause great error. The stability of bank slope is analyzed by Phase2 software for three different conditions. The calculated results that in good agreement with the actual monitoring data when the local strength reduction method are used in hydro-fluctuation belt and strongly weathered layer. Due to the rise and fall of water level in reservoir. The structure of rock-soil is changed and the strength of decreased under the action of long term dry and wet circulation. The area where shearing and tensioning failure is increased in the bank slope. It is gradually extended from the foot of the slope to the back edge of the landslide.

关 键 词：局部强度折减法 全局强度折减法 反倾岩质库岸边坡 稳定性分析 

分 类 号：TV432[水利工程—水工结构工程]