摘要
以兰州市地铁1号线一期工程五里铺车站深基坑工程为背景,采用非线性有限元软件Midas GTS对地铁车站深基坑开挖过程进行仿真模拟,研究施工过程中"钻孔灌注桩+内支撑"围护结构的内力及变形、周围土体的沉降规律及范围,桩后土体的水平位移等随基坑开挖深度的变化规律.通过施设不同位置钢支撑对基坑变形的影响和原方案进行对比分析,得出原方案在控制变形等方面有较好的效果,且桩体最大水平位移减小0.36mm.
Based on deep foundation pits of Wulipu Station of Lanzhou subway line one first-stage project, the nonlinear finite element software Midas GTS was adopted to simulate all the stages of the pit excava- tion and research the internal force and deformation of the bored-pile-and-inner-support enclosure struc- tures ,and the displacement and subsidence of the surrounding soil with the change of the pit excavation depth. For the choice of the optimal shoring scheme, the influence of the different location steel support up- on the deformation of foundation pits was analyzed, and compared to the modified scheme the original de sign was found to be more effective in preventing deformation, and the maximum horizontal displacement of piles reduced by 0.36 mm. The conclusion is of much value to the reasonable design and construction of foundation pits with the similar supporting structures.
出处
《甘肃科学学报》
2014年第2期58-62,共5页
Journal of Gansu Sciences
基金
甘肃省自然科学基金项目(1104ZSB080)
关键词
深基坑
有限元
桩加内支撑
变形
Deep foundation pit
Finite element
Pile-and-inner-support
Deformation
