摘要
以某大学文化中心的基坑边坡为例,对影响边坡稳定的基坑土体的粘聚力、内摩擦角、重度、坡高、坡度5个因素进行敏感性分析。在常规正交试验设计分析的基础上,借助MATLAB软件对瑞典条分法和毕肖普法这两种计算边坡安全系数的方法进行编程,并依据实例数据分别计算出边坡安全系数,然后结合极差分析、方差分析、因素间交互作用影响分析以及安全系数变化率趋势分析,对因素敏感性进行量化评价,找到这五个因素中影响基坑失稳的相对主要因素和次要因素。通过多种试验的综合分析,实例结果表明:在这五个因素中,土体的粘聚力、重度和坡高为相对主要因素,内摩擦角与坡度为相对次要因素。分析结果符合工程实践经验,能为日后类似工程提供借鉴。
Taking the foundation slope of a university culture center as an example,the sensitivity analysis of the factors which influence the slope stability of the foundation pit including foundation soil cohesive force,internal friction angle,weight,height and slope was done. The quantitative evaluation of sensitive factors was done based on the combination of conventional orthogonal experiment,the calculation of soil mechanics safety coefficient by Sweden Circle and Bishop methods were done by Matlab software. The slope safety coefficient was calculated according to instance data,quantitative evaluation of the sensitivity of the factors was done by range analysis,variance analysis,interactive analysis and variation trend analysis of safety coefficient in order to find the main and secondary factors influencing the stability of foundation pit. The results obtained through the comprehensive analysis of a series of experiments,which were in accordance with engineering practice,showed that soil cohesive force,weight and height should be taken as the main factors whereas internal friction angle and slope as the secondary ones and could provide guidance for similar projects in the future.
作者
李英华
张明媛
袁永博
LI Ying-hua ZHANG Ming-yuan YUAN Yong-bo(Faculty of Infrastructure Engineering, Dalian University of Technology, Dalian 116024, China)
出处
《土木工程与管理学报》
北大核心
2017年第1期113-116,142,共5页
Journal of Civil Engineering and Management
基金
中央高校基本科研业务费专项资金资助项目(DUT14QY42)
关键词
基坑边坡
正交试验设计
敏感性分析
极差分析
方差分析
交互作用
foundation pit slope
orthogonal experiment design
sensitivity analysis
range analysis
variance analysis
interactive analysis
