典型基坑围护桩施工内力的变形规律  

Analysis on the Internal Forces and Deformations of a Typical Pit Pile Protection

作　　者：丁习富[1] 唐世强[1] 

机构地区：[1]中国中铁二院工程集团有限责任公司,成都610031

出　　处：《都市快轨交通》2008年第2期36-39,共4页Urban Rapid Rail Transit

摘　　要：以水平荷载计算K法为依据,在广州某典型含有较厚淤泥质砂土和粗砂层的地铁车站详细地勘资料基础上,应用大型通用有限元软件ANSYS为主要手段,以梁单元和弹簧单位为对象,分别模拟基坑围护桩和被动土压力行为。按照实际施工过程分析,拟合桩的内力和变形情况,得出桩在受地层的空间分布控制和在受施工过程的时间分布上的内力、变形分布规律,即空间上最不利位置出现在粗砂层,时间上最不利时刻出现在筑底板拆底撑时刻。K method of horizontal load calculation was adopted as the basis of the paper. Considering the detailed geologic investigation data of a subway station in Guangzhou, which features a thick silt layer and a coarse sand layer, ANSYS software was used with beam and spring elements simulating the pit pile protection and passive soil pressure behavior respectively. Then the distribution rule of internal forces and deformations of the pile protection during construction was revealed the most disadvantageous position occurred in the coarse sand layer, while the most disadvantageous time was at the moment when bottom bracings were dismantled.

关 键 词：围护桩 ANSYS 内力 变形 分布规律 

分 类 号：TU74[建筑科学—建筑技术科学] TD353.6[矿业工程—矿井建设]