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随着三峡库区蓄水,塌岸已经成为库区普遍、典型的、影响移民工程安全的重大环境地质问题。本文总结了库区库岸结构与塌岸形式,论述了塌岸预测思路与方法。以三峡库区某库岸为例,采用极限平衡法,对c、φ进行了敏感性分析,讨论了多种工况下,多个库岸剖面的稳定性系数,并在此基础上得到塌岸宽度。在工程地质类比的基础上,采用图解法进行塌岸宽度预测,根据现场变形监测资料,对两种预测结果进行评判,得到塌岸预测最终结果。
With the storage of the Three Gorges Reservoir area, bank collapse has become a common and typical reservoir environment, affecting the safety of resettlement projects of major environmental and geological issues. This paper summarizes the reservoir bank structure and bank collapse form, and discusses the thinking and method of bank collapse prediction. Taking a bank of the Three Gorges Reservoir as an example, the sensitivity analysis of c and φ is carried out by using the limit equilibrium method. The stability coefficients of several banks and banks under various working conditions are discussed, and based on this, Shore width. On the basis of engineering geological analogy, the width of bank collapse is predicted by graphic method. According to the field deformation monitoring data, the two prediction results are judged and the final result of bank collapse prediction is obtained.