摘要
在逆作法深基坑围护结构体系支撑刚度计算中,通常认为结构自重及施工荷载均由竖向支承体系承担,而忽略了其横向承载能力,造成了工程上的浪费。本文对竖向支承体系所具有的侧向刚度进行研究,提供一种基于数值分析结果的侧向刚度的计算方法,可用于快速计算工程中各类立柱结构形式的侧向刚度。文章通过工程实例对不同形式下的钢管柱和格构柱结构体系的侧向刚度进行数值计算,给出相应的侧向刚度拟合计算式。分析表明拟合算式所得侧向刚度略大于数值计算所得,误差在2.50%~9.26%之间,根据拟合算式计算排架结构的侧向刚度能够满足围护结构分析的要求。本文提出的侧向刚度计算方法可靠,能够用于类似工程,可供深基坑工程设计、施工人员参考。
In the calculation of the support stiffness of the deep foundation pit retaining structure system with the top-down construction method,the structural deadweight and construction load are borne by the vertical support system,and the lateral bearing capacity Is ignored.The article intends to calculate the lateral stiffness of the vertical support system,and provides a method for calculating the lateral stiffness based on the results of numerical analysis.The method can be used to quickly calculate the lateral stiffness of various column structures in engineering.The lateral stiffness of steel pipe column and lattice column structure under different forms is numerically calculated.The corresponding lateral stiffness fitting calculation formula is given.The error between the fitting formula and the numerical calculation is between 2.50%~9.26%.The calculation method of lateral stiffness proposed in the paper is reliable.It can be used in similar projects and can be used as a reference for deep foundation pit engineering design and construction personnel.
作者
李冕
徐阳
张搏
LI Mian;XU Yang;ZHANG Bo(Chongqing Vocational Institute of Safety&Technology,Chongqing 404020,China;Guizhou Minzu University,Guiyang 550025,China)
出处
《工程地质学报》
CSCD
北大核心
2020年第5期1116-1122,共7页
Journal of Engineering Geology
基金
重庆市高等教育教学改革研究项目(资助号:193508)
贵州省科技厅基础研究项目(资助号:黔科合基础[2019]1169)
贵州省教育厅青年科技人才成长项目(资助号:黔教合KY字[2018]151)。
关键词
深基坑
竖向支撑
侧向变形刚度
数值分析
解析计算方法
Deep foundation pit
Vertical support
Lateral deformation stiffness
Numerical analysis
Analytical calculation method
作者简介
第一作者简介:李冕(1988-),女,硕士,讲师,主要从事建筑工程、安全工程方面的科研与教学工作.E-mail:717364398@qq.com。
