厚填土场地基坑开挖对临近建筑的影响  

The Impact of Excavation of Foundation Pits in Thick Fill Sites on Adjacent Buildings

作　　者：余建河 颜荣华[2] 朱鹏 YU Jianhe;YAN Ronghua;ZHU Peng(Shaanxi Hongji Architectural Survey and Design Engineering Co.,Ltd.,Xi'an Shaanxi 710065,China;Jiangsu Nanjing Geology Engineering Investigation Institute,Nanjing Jiangsu 210041,China;Nanjing Kuntuo Civil Engineering Technology Co.,Ltd.,Nanjing Jiangsu 210041,China)

机构地区：[1]陕西宏基建筑勘察设计工程有限公司,陕西西安710065 [2]江苏南京地质工程勘察院,江苏南京210041 [3]南京坤拓土木工程科技有限公司,江苏南京210041

出　　处：《江苏建筑》2024年第6期130-133,共4页Jiangsu Construction

摘　　要：鉴于填土的强度较低,基坑开挖会对临近的建筑产生影响,文章基于有限元软件Midas GTS NX,模拟厚填土区基坑开挖对支护变形、临近建筑的影响。研究发现,厚填土场地的基坑开挖、支护结构的水平位移表现出随着开挖深度的增加而增大,支护桩的水平最大位移量往往出现在开挖深度的中部;基坑周边地面的沉降量随着开挖深度的增加而增加,竖向最大沉降量出现在距坑边1.2倍的开挖深度处;对于采用大型筏板基础的建筑,角点的水平和竖向位移均表现出随着基坑开挖深度的增加而增加。Considering the low strength of the fill soil,excavation of foundation pits will have an impact on adjacent buildings.Based on the finite element software Midas GTS NX,this paper simulates the impact of excavation of foundation pits in thick fill areas on support deformation and adjacent buildings.Research has found that in the excavation of foundation pits in thick fill sites,the horizontal displacement of the support structure increases with the increase of excavation depth,and the maximum horizontal displacement of the support pile often occurs in the middle of the excavation depth.The settlement of the ground around the foundation pit increases with the increase of excavation depth,and the maximum vertical settlement occurs at 1.2 times the excavation depth from the pit edge.For buildings with large raft foundations,the horizontal and vertical displacements of the corners show an increase with the depth of the excavation of the foundation pit.

关 键 词：填土基坑 临边建筑 变形特性 

分 类 号：TU463[建筑科学—结构工程]