摘要
三峡工程全面蓄水在即,库水位周期性的变动必定引起大范围的塌岸。以巴阳移民新村库岸为例,选取典型剖面,根据饱和—非饱和渗流理论,应用GEO-SLOPE软件分析了水位变动条件下库岸渗流场变化,进一步分析了库岸稳定性的变化趋势,并选用卡丘金法和极限平衡搜索法对塌岸范围进行了预测。结果表明:在蓄水至145m1、56 m1、75 m及175 m骤降至145 m四种工况中,随着库水位的上升,库岸稳定性有下降的趋势,在库水从175m骤降至145 m时稳定系数最低,预测塌岸范围24.5 m和29.5 m,为移民区土地利用提供了科学的依据。
With the approaching of the overall water storage of Three Gorges Project, the periodic changes of the reservoir water level will surely lead to the large-scale bank destruction. Taking the reservoir bank of Bayang migration village as an example, this paper selects a typical section and analyzes the transformation of the saturation-unsaturation infiltration field when water level changes via GEO-SLOPE software in accordance with Saturation-unsaturation Infiltration Theory, further presents the movement or trends of reservoir bank stability, and adopts E Г KaЧУГИН Method and Limit Balance Searching Method to predict the bank destruction. The results show that, among four situations when water storage reaches 145 m, 156 m and 175 m or drops back to 145 m sharply, the reservoir bank stability tends to decrease correspondingly with the increase of reservoir water level, and the stability coefficient is the lowest when the water level drops from 175 m back to 145m. The prediction range of bank destruction is 24. 5 m-29.5 m, and this prediction provides a scientific guidance for the rational utilization of land in the migration region.
出处
《安全与环境工程》
CAS
2007年第4期40-43,共4页
Safety and Environmental Engineering
关键词
三峡库区
饱和-非饱和渗流
库岸稳定性
塌岸预测
Three Gorges reservoir region saturation-unsaturation infiltration reservoir bank stability prediction of bank destruction
