太沙基松动土压力系数的研究  

Study on coefficient of Terzaghi loosening pressure formula

作　　者：李君[1] 

机构地区：[1]铁道第三勘察设计院集团有限公司,天津300251

出　　处：《山西建筑》2016年第31期89-91,共3页Shanxi Architecture

摘　　要：从土拱的角度对太沙基松动土压力公式中的侧压力系数进行了研究,提出了土拱是沿大主应力形成的观点,并通过MohrCoulomb极限平衡应力圆分析,推导了太沙基松动土压力公式中侧压力系数K的一般表达式,其可用于地基局部沉降、盾构隧道工程的土压力分析。From the soil arch,the paper researches the side pressure coefficient in Terzaghi relation soil press formula,soil arch may be depicted as a trajectory of major principal stress that approximates an upward circular arc. Based on the Mohr-Coulomb theory,the modified lateral earth pressure coefficient in Terzaghi loosening pressure formula is presented. It can be used to analyze the earth pressure in the engineering of local subsidence of ground,tunnel and so on.

关 键 词：松动土压力 侧压力系数 土拱效应 

分 类 号：TU432[建筑科学—岩土工程]