深基坑土钉支护抗楔体滑落可靠度分析  

Reliability Analysis of Resistance Slide Wedge in Deep Foundation Pit Soil Nailing

作　　者：姚海慧[1] 陈晓霞[1] 付向红[1] 

机构地区：[1]安阳工学院土木与建筑工程学院,河南安阳455000

出　　处：《河南科技大学学报（自然科学版）》2013年第2期66-69,2,共4页Journal of Henan University of Science And Technology:Natural Science

基　　金：河南省重点科技攻关基金项目(102102310311);河南省高等学校创新人才培养工程(2005KYCX015)

摘　　要：针对深基坑土钉支护结构的楔体滑落破坏模式,以概率理论为基础进行了可靠度研究。通过确定潜在破裂面的位置进行受力分析,并建立极限状态功能函数。基于实用一次二阶矩分析法,编写可靠度分析程序,结合实例,研究土的黏聚力、内摩擦角及钉-土界面粘结强度的变异性和分布类型对结构可靠度的影响。研究结果表明:内摩擦角的变异性和分布类型的影响作用最显著,在结构稳定性分析中是不可忽视的。Wedge reliability was studied in deep foundation pit soil nailing based on probability theory.The potential fracture position was determined and the limit state function was built when the internal forces were analyzed.A corresponding reliability design program was compiled by practical first order second moment analysis method.In an engineering project,some influencing rules were studied about the variability and distribution of cohesion of soil,internal friction angle of soil,and bangding strength of nail-soil.The results show that the variability and distribution type of internal friction angle are notable factors and can not be neglected in design.

关 键 词：深基坑 楔体滑落 可靠度 变异性 分布类型 

分 类 号：TU473.2[建筑科学—结构工程]