地铁深基坑支护结构计算方法研究  

Study on Calculation Methods of Brace Construction for Metro Deep Foundation Pits

作　　者：朱占国[1,2] 赵文[1] 李慎刚[1] 纪新博[1] 唐志扬[1] 

机构地区：[1]东北大学资源与土木工程学院,沈阳110819 [2]铁道第三勘察设计院,天津300142

出　　处：《地下空间与工程学报》2013年第5期1109-1114,共6页Chinese Journal of Underground Space and Engineering

基　　金："十二五"国家科技支撑项目(2012BAK24B01);教育部基本科研业务费项目(N110301003)

摘　　要：随着地铁建设进程的不断推进,地铁深基坑工程的数量不断增多,深基坑的安全性和经济性引起广泛的关注。本文在考虑地铁深基坑的特点和破坏形式的基础上,结合地基承载力理论和计算方法,将地基承载力理论应用于地铁深基坑支护结构计算中。从而提出了应用静力平衡和地基承载力理论计算支护桩嵌固深度的深基坑支护结构的优化计算方法。该计算方法为有效解决砂类地层计算结果与工程实际差异较大问题、提供了新的视角和理论依据。研究内容对砂类土层基坑围护体系设计有一定的参考的意义。With the increasing growth of metro engineering construction in China, more and more metro foundation pits appear, especially those using open-cut construction method in metro station and metro section. The safety and economy of deep foundation pit have caught the wide attention of the society. In this paper,based on the characteristics and failure styles of foundation pit with taking into account the theory and calculation method of bearing capacity of foundation, this theory is applied in the design of metro deep foundation pit. A new proposed calculation method of embedded depth of piles is presented according to the theory of static equilibrium and beating capacity of foundation. It is shown that this suggested method is an effective one to explain the difference between the theory calculation results and engineering field measured values for sandy ground. The research has important reference meaning to design of the foundation pit in sandy soil.

关 键 词：地铁深基坑 支护结构 地基承载力 桩嵌固深度 

分 类 号：O319.56[理学—一般力学与力学基础]