摘要
钢支撑系统承载力是基坑安全的重要保障。采用3种不同计算方法,对钢支撑管节在偏心受力下的极限承载力进行对比分析。分析结果表明,解析法结果较保守,梁单元法结果偏高,因此从偏于安全的角度考虑,可采用解析法作为承载力计算方法;规格一定时,钢支撑极限承载力主要取决于偏心距;偏心距一定时,抱箍约束作用直接决定钢支撑极限承载力。
Bearing capacity of steel support system is an important guarantee for foundation excavation safety.Three different calculation methods are used to compare and analyze the ultimate bearing capacity of steel support pipe joints.The results show that the analytical method results are conservative,and the beam element method results are high.Therefore,the analytical method can be used as the calculation method of bearing capacity from the perspective of safety.The ultimate bearing capacity of steel supports with a certain specification depends mainly on the eccentricity.When the eccentricity is constant,the restraining effect of the hoop directly determines the ultimate bearing capacity of the steel support.
作者
孙九春
白廷辉
SUN Jiuchun;BAI Tinghui(Tengda Construction Group Co.,Ltd.,Shanghai 200122,China;Shanghai State-owned Assets Supervision and Administration Commission,Shanghai 200003,China)
出处
《施工技术》
CAS
2019年第21期113-117,共5页
Construction Technology
基金
软土地铁基坑的施工控制理论与实践(2016-sh-01)
关键词
地铁
基础
钢支撑
极限承载力
解析法
梁单元法
受力性能
subways
foundations
steel supports
ultimate bearing capacity
analytical method
beam element method
mechanical properties
