工程建设诱发滑坡灾害的有限元分析

人类工程建设进程中常常伴随着滑坡灾害的发生,对工程建设的顺利进展影响重大.结合清江水布垭高面板堆石坝工程建设中施工区内古树包滑坡体成灾机理的研究,应用非线性有限元方法对影响滑坡灾害形成的开挖卸荷、地下水、降雨等项因素进行了分析与计算,探讨了该滑坡灾害形成的过程与机理,研究结果表明,由于堆积体的物质组成特性及几何形状特征对稳定的敏感性,在人类工程活动的扰动及强降雨的影响下,诱发了滑坡灾害的发生,为该滑坡体的治理加固及今后工程建设中滑坡灾害的防治提供了重要参考.

Study on Landslide Hazards Caused by Project Construction Using Finite Element Method

The landslide hazards offen occurred during the project construction.The influences of landslides on the construction process of projects are very large.Combined the study on mechanism of the Gushubao landslide which is located in construction region of the Shuibuya large concrete face rockfill dam,of which the maximum height is 234 meters,on the Qingjiang River.The nonlinear finite element method is applied to study mechanisms of the landslide,concerning facts of unloading effect due to excavation of the slope,underground water and rainfall effect etc.,of the landslide hazard.Research results show that because of sensitivity of the characteristics of composition and the geometry of the landslide on its stability,the landslide hazard occurred caused by artificial engineering activities including excavating the slope to build road and the heavy rainfall continuously.The very important conferences and experiences are offered for landslide hazards protection during the periods of project construction in the future.