摘要
以台北某拟建建筑物深基坑为背景,利用有限元软件PLAXIS进行数值模拟计算,在不对称土岩组合条件下,建立考虑下层地层差异性变化和忽略地层差异性变化两种模型,分析深基坑两侧在开挖与回筑过程中连续壁水平位移、弯矩和钢支撑轴力的变化。结果表明在不对称土岩组合情况下,基坑两侧围护结构内力及位移都存在较大差异,在进行基坑支护设计时,不仅要考虑基坑两侧的荷载差异性,还要重视基坑两侧的地层差异性;当基坑两侧地层、荷载条件不同时,需对基坑两侧的变形和内力分别进行校核。
Based on the foundation pit of a certain proposed building in Taipei, with the finite element software PLAXIS, under the condition of asymmetric soil-rock combination, two different models are established respectively by considering or ignoring the distinctions of the soil stratum, and the changes of horizontal displacements, bending moments and the strut axial stresses in the process of excavation and back-fill are analyzed. The results show： that under the rough or accurate soil stratum conditions, the displacements and bending moment of the continuous wall differ a lot, so the stresses and deformations of the retaining structure depend not only on the loading conditions, but also highly on the soil stratum conditions; that when strata of both sides of foundation pits or loading conditions are different, the deformation and stress of the each side of the deep foundation should be checked respectively
出处
《建筑技术》
2014年第3期207-211,共5页
Architecture Technology
基金
多年冻土地区公路建设与养护技术交通行业重点实验室青海研究观测基地开放基金项目资助(2011.5.17)
关键词
PLAXIS
土岩组合
不对称
深基坑
支护
PLAXIS
soil-rock combination
asymmetric
deep foundation pit
retaining wall
