边坡稳定分析中加速度临界滑动面研究  

STUDY ON CRITICAL SLIP SURFACE OF ACCELERATION IN SLOPE STABILITY ANALYSIS

作　　者：介玉新[1] 柏永亮 张彬[3] 

机构地区：[1]水沙科学与水利水电工程国家重点实验室三江源协同创新中心(清华大学),北京100084 [2]天津市市政工程设计研究院,天津300051 [3]中国地质大学(北京)工程技术学院,北京100083

出　　处：《工程地质学报》2017年第5期1238-1244,共7页Journal of Engineering Geology

基　　金：十三五国家重点研发计划(2017YFC0404800;2017YFC0804600);国家自然科学基金项目(51525901)资助

摘　　要：采用最大加速度也可以评价边坡的安全性。当黏聚力在土的抗剪强度中所占比重较小时,加速度与稳定系数的相关性较好。本文进一步比较加速度临界滑动面与稳定系数临界滑动面的关系,发现对于坡角α≥45°的简单边坡,在ξ<0.1时,加速度临界滑动面与稳定系数临界滑动面是比较接近的。对于加筋土边坡,在筋材较短时,稳定系数较小的区域分布在筋材末端位置;筋材长度较长时,其位置和区域随着筋材长度的增加不再发生明显变化。但加速度较大的区域几乎都分布在筋材末端。相关机理还需要进一步研究。The maximum acceleration can also be used to evaluate the stability of slopes. It has been found that the correlation between the safety factor and the acceleration is more significant when cohesion has smaller weight in shear strength of the soil. In this paper,the correlation between the critical slip surfaces of acceleration and safety factor are further investigated. Results show that for slopes with the slope angle α≥45°,the critical slip surface of acceleration is close to that of safety factor when ξ 0. 1. For reinforced slopes,smaller safety factors are located near the end of the reinforcement when the reinforcement is short. While the location will not change when the reinforcement is long enough. However, the bigger accelerations are always located near the end of the reinforcement,the mechanism of which need further investigation.

关 键 词：边坡 稳定分析 加速度 稳定系数 临界滑动面 

分 类 号：TU43[建筑科学—岩土工程]