基坑开挖边坡稳定性分析方法的比较研究  

Comparative Study on Slope Stability Analysis of Foundation Pit Excavation

作　　者：曹裕荣 CAO Yu-rong(Nantong Chengxin Municipal Engineering Co.,Ltd,Nantong Jiangsu 226000 China)

机构地区：[1]南通城欣市政工程有限公司,江苏南通226000

出　　处：《江苏建筑》2020年第2期86-88,共3页Jiangsu Construction

摘　　要：常用的边坡稳定性分析方法是瑞典条分法和毕肖普简化法,结合某基坑开挖边坡稳定性分析,对比论证2种方法之间的关系。瑞典条分法不考虑土条两侧的作用力,得到的边坡稳定安全系数偏小,且在滑动面圆弧夹角较大时偏差可能很大。毕肖普简化法在瑞典法的基础上,考虑了条间作用力在法线方向的贡献,计算结果精度较高,因此在不含软弱层的土质边坡稳定性分析中应优先采用,对边坡安全评价具有重要意义。The commonly used slope stability analysis methods are the Swedish slice method and Bishop's simplified method.Combined with the stability analysis of a foundation pit excavation slope,the relationship between the two methods is compared and demonstrated.The Swedish slice method does not consider the forces on both sides of the soil strip,and the obtained slope stability safety factor is too small,and the deviation may be large when the arc angle of the sliding surface is large.Bishop's simplified method is based on the Swedish method,taking into account the contribution of the force between the strips in the normal direction,and the calculation result is highly accurate.Therefore,it should be used preferentially in the stability analysis of soil slopes without soft layers.Slope safety evaluation is of great significance.

关 键 词：瑞典条分法 毕肖普简化法 边坡稳定性分析 安全系数 

分 类 号：TU753.1[建筑科学—建筑技术科学]