摘要
泄滩滑坡坡体从水力学特性来看为3层透水性较强的岩层(坡积物、滑坡堆积物和滑坡影响带)和2层透水性较弱的岩层(滑带和基岩)构成的互层状结构。以此为基础,进行了三峡库区蓄水至175 m水平时泄滩滑坡的渗流场与应力场耦合分析,得出滑坡体内水头分布﹑滑带底面承受的浮托力分布以及各应力分量分布。可以看出,泄滩滑坡水力学特性上的这种互层状结构不利于滑坡体的稳定,耦合作用对渗流场的影响不大,但对应力场的影响较大。
The Xietan landslide body can be regarded as an interbedded structure with three permeable layers (slope wash,landslide deposit deposit,and effected zone of the landslide) and two relatively impermeable layers (sliding zone and foundation rock),so it is important to consider the coupling action of seepage and stress in the slide to evaluate the stability of landslide. The coupled seepage and stress fields in the Xietan landslide are analyzed by means of the continuum model when the reservoir water level reaches elevation of 175 m. The hydraulic head distribution in the landslide,the uplift pressure distribution along the bottom of sliding zone and the distribution of stress components are obtained based on the analysis. The results show that the interbedded structure is adverse to the stability of the Xietan slide,and the coupling action has more important effect on the stress field than on the seepage field.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2004年第8期1280-1284,共5页
Chinese Journal of Rock Mechanics and Engineering
基金
国家自然科学基金(10202015)
教育部留学回国人员科研启动基金(106-220331)
陕西省教育厅自然科学专项基金(03JK098)
西安理工大学科技创新计算项目(106-210303)资助课题
关键词
边坡工程
泄滩滑坡
水力学
渗流场
应力场
耦合分析
三峡库区
slope engineering,Xietan landslide,hydraulic properties,seepage field,stress field,coupling analysis
