摘要
针对广州地铁燕塘站深基坑工程,建立了三维有限元模型,对施工过程进行了三维仿真模拟,分析了不同的模型平面尺寸及计算深度对深基坑变形产生的尺寸效应,提出了确定有限元模型合理尺寸的方法。结果表明:当深基坑模型宽度达到或超过3.5倍深基坑开挖深度、地下连续墙底土层厚度达到或超过1倍地下连续墙深度时,基本可消除模型的尺寸效应影响。
Based on the excavation of deep mensional finite element model was establi sion. The size effect of model＇ s dimension foundation pit of Yantang station in shed, and the construction process Guangzhou subway, a three -di- was simulated in three- dimen- including plane size and depth on the deformation of the deep founda- tion pit was analyzed, and a method to determine the reasonable size of the finite element model was proposed. The result shows that the model＇ s size effect can be roughly eliminated while the deep foundation pit model＇ s width is greater than or equal to 3.5 times of the depth of foundation pit and the thickness of soil stratum lying below diaphragm wall is greater than or equal to the depth of diaphragm wall.
出处
《铁道科学与工程学报》
CAS
CSCD
2011年第2期59-63,共5页
Journal of Railway Science and Engineering
关键词
地铁深基坑
三维有限元模型
尺寸效应
deep foundation pits in subway
three -dimensional finite element model
size effect
