深基坑工程支护结构变形的时空效应

Time-space Effect of Supporting Structure Deformation in Projects of Deep Foundation Pits

深基坑工程中支护结构的变形规律具有一定的时空效应.以天津站交通枢纽工程的深基坑工程作为研究背景,在对现场实测数据分析的基础上,建立了墙段开挖模型,以不同的开挖顺序和不同的开挖单元划分方式对基坑开挖进行数值模拟分析.研究表明:地下连续墙墙体变形的大小不仅取决于基坑开挖的顺序,也与开挖单元的划分有关,在开挖顺序相同的情况下,开挖单元越多,墙体变形越小.

The deformation of the supporting structure in projects of deep foundation pits has a certain space-time effect. Against the research background of the deep foundation pit project in the transport hub project of Tianjin railway station, this paper establishes the wall excavation segment model on the basis of the field measured data, and then carries out a numerical value simulation analysis in different excavation sequences and by different excavation unit modes. The research results show that the deformation of diaphragm wall is not only dependent on the order of excavation, but also connected with the division of the excavation unit mode. In the same excavation sequence, the more the excavation units are, the smaller wall deformations will be.