摘要
针对深厚软土地区采用坑内墩式加固的基坑,按实际工况进行了基坑开挖的二维非线性有限元模拟分析,经检验模拟计算结果能较好地反映现场实际基坑变形的变化规律。现场实测变形与模拟分析结果表明,控制坑内加固墩宽度在合理范围,可有效减小基坑及支护结构变形,且加固墩深宽比是控制支护结构变形的主要设计因素;在深厚软土地区,随着软土层厚度的增加,利用坑内墩式加固控制支护结构变形的效果更加明显。
Aiming at the foundation pit reinforced by pier in pit in deep soft soil area,the two-dimensional nonlinear finite element simulation analysis of foundation pit excavation is carried out according to the actual working conditions.The simulation results can better reflect the variation law of actual foundation pit deformation.The results of field measured deformation and simulation analysis show that the deformation of foundation pit and supporting structure can be effectively reduced by controlling the width of reinforcement pier within a reasonable range,and the depth width ratio of reinforcement pier is the main design factor to control the deformation of supporting structure;in deep soft soil area,with the increase of soft soil thickness,the effect of controlling the deformation of supporting structure by pier reinforcement in pit is more obvious.
作者
蔡训
顾欢达
CAI Xun;GU Huan-da(Civil Engineering College,Suzhou University of Science and Technology,Suzhou Jiangsu 215011 China)
出处
《江苏建筑》
2021年第4期85-89,共5页
Jiangsu Construction
关键词
深基坑
深厚软土
墩式加固
有限元模拟
deep foundation pit
deep soft soil
pier reinforcement
finite element simulation
