基于正交试验的基坑抗隆起稳定性影响因素灰色关联分析  

Gray correlation analysis of influencing factors for anti uplift stability of foundation pit based on orthogonal test

作　　者：王燕 蒋国平[1] 张飞[1] 郭云龙 WANG Yan;JIANG Guoping;ZHANG Fei;GUO Yunlong(School of Engineering, Fujian Jiangxia University, Fuzhou 350108, China;Beijing Urban Construction Design and Development Group Co., Ltd., Beijing 100000, China)

机构地区：[1]福建江夏学院工程学院,福州350108 [2]北京城建设计发展集团有限公司,北京100000

出　　处：《青岛理工大学学报》2021年第2期78-85,共8页Journal of Qingdao University of Technology

基　　金：国家自然科学基金资助项目(41772297);福建省教育厅中青年教师教育科研项目(JAT200369,JAT200374);福建江夏学院校级科研项目(JXZ2020006)。

摘　　要：为探究基坑抗隆起稳定性各影响因素敏感程度的大小,在深入研究基坑抗隆起稳定性影响因素敏感性分析方法的基础上,提出采用正交试验和灰色关联分析相结合的方法对基坑抗隆起稳定性影响因素进行敏感性分析.结合福建地区某基坑工程实例,通过有限元强度折减计算,对影响坑底抗隆起稳定性的6个主要影响因素敏感性大小进行研究.结果表明,内摩擦角是影响基坑抗隆起稳定性的主要敏感因素,黏聚力和支挡墙插入比敏感性次之,土体重度、地面超载敏感性较小,最下道内支撑距坑底距离的影响最小.正交试验和灰色关联分析相结合可以在充分考虑各影响因素相互作用的基础上,通过定量分析清楚地确定各因素之间的主次关系,达到对研究对象各影响因素整体评价的目的.In order to study the extent of each factor on the anti uplift stability of the foundation pit,based on the further research on the sensitivity analysis method of the influencing factors of the anti uplift stability of the foundation pit,the article puts forward the method that combines orthogonal test and gray correlation analysis to analyze the sensitivity of the factors affecting the anti uplift stability of the foundation pit.In combination of the example of a foundation pit project in Fujian area,through the calculation of the strength reduction of the finite element,the sensitivity of the six main influencing factors that affect the anti uplift stability of the pit is studied.The results show that the internal friction angle is the main sensitive factor that affects the anti uplift stability of the foundation pit,followed by the cohesion and the insertion ratio of the retaining wall.The sensitivity of the soil weight and ground overload is small.The effect of the distance from the lowest support to the pit is minimal.The combination of orthogonal test and gray correlation analysis can clearly determine the closeness in relationship between various factors through quantitative analysis on the basis of fully considering the interaction of various influencing factors,so as to achieve the overall evaluation of the influencing factors of the research object.

关 键 词：抗隆起稳定性 灰色关联分析 正交试验法 强度折减法 

分 类 号：TU476.3[建筑科学—结构工程]