标题:
基坑开挖深度对邻近建筑物的影响Influence of Excavation Depth of Foundation Pit on Adjacent Buildings
作者:
朱静, 秦世伟
关键字:
FLAC3D, 基坑开挖, 地表变形, 建筑物变形FLAC3D, Pit Excavation, Surface Deformation, Building Deformation
期刊名称:
《Hans Journal of Civil Engineering》, Vol.4 No.5, 2015-09-16
摘要:
结合外滩隧道工程实测数据，运用三维快速拉格朗日分析程序FLAC3D研究了基坑不同开挖深度对邻近建筑物的影响。在数值分析过程中，基坑开挖采用分段分层的方式进行，开挖时竖向围护结构的支撑作用通过提高周围土体参数来实现；水平支撑的作用则通过施加定点水平集中力来模拟。由数值模拟结果得到基坑开挖深度引起建筑物沉降的变形规律，据此可根据建筑物允许变形值评估基坑开挖对建筑物的影响程度。
Combining
with the measured data of bund tunnel project, the effect of excavation depth
on the adjacent buildings is studied by using the three-dimensional fast
Lagrange analysis program—FLAC3D. In the process of
numerical analysis, the excavation of foundation pit is carried out by the way
of sub layer, and the supporting role of vertical support structure is realized
by improving the parameters of surrounding soil. By numerical simulation
results, the deformation law of building settlement caused by excavation depth
is obtained, which can be based on the allowable deformation value of the
foundation pit to evaluate the influence of foundation pit excavation on the
building.