摘要
应用加卸载响应比理论对长江三峡库区典型降雨型堆积层滑坡的位移失稳规律、加卸载动力学作用过程与特点等进行了系统研究,确定了该类滑坡加卸载参数及加卸载响应参数,建立了加卸载响应比预测模型。以新滩滑坡分析为例,运用加卸载响应比预测模型对新滩边坡关键部位监测点A3,B3进行了加卸载响应比计算,发现该两点的加卸载响应比时序曲线均在边坡失稳前发生突变,其突变时间与边坡实际失稳时间完全吻合。证明了加卸载响应比理论是可应用于中、短期预报堆积层滑坡的一种有效方法。
A systematic study is carried out on the displacement law, the dynamic process and feature of load and unload for the colluvial landslide induced by rainfall in the Three Gorges by means of load-unload response theory. Through analysis on the displacement response feature, the load-unload parameter and load-unload response parameter are determined and its prediction model is also established for this type of landslide. The calculation of load-unload response ratio of monitoring points A3, and B3 of Xintan landslide in China is completed by using the load-unload response prediction model. The computation results show that an abrupt jump occurs in the curve of load-unload response ratio of monitoring points A3 and B3 just before landslide takes place, and the abrupt jump point agrees with the destabilized time of the landslide. All results show that the load-unload response ratio theory is a very effective nonlinear dynamic one in the short and middle-term prediction of colluvial landslides.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2004年第16期2665-2670,共6页
Chinese Journal of Rock Mechanics and Engineering
基金
山东省自然科学基金(Y2003E01)资助项目
