深基坑工程动态施工反演分析与变形预报

提出了动态施工反演分析的思想，即在常规的反分析过程中引入逐步开挖和逐道支撑的动态施工因素，以求仿真模拟工程实际情况，进而为相继施工阶段的变形预报提供可靠保证。文中基于任意施工阶段间围护墙体变形与内支撑梁轴力的增量测值和施工ＦＥＭ优化反演分析法，反推了各土层的弹性模量系数，给出了作用在墙体两侧的土压力分布，并预报各相继施工阶段的墙体和土体变形、内力及内支撑梁轴力。

Back analysis of construction of deep excavation and deformation prediction

This paper presents the idea of back analysis with developing process, i. e., a construction process of excavation and support in stages is introduced into the common back analysis, thus providing a reliable guarantee for predicting the deformation in succession construction stages. Based on the incremental measured data between two abitrary stages, such as the horizontal deformation of the retaining wall and the axial force of the braced truss,and by use of the back analysis method of FEM with the function of construction simulating, the elastic moduli of several soil layers are back calculaed, the lateral pressures on the wall are evaluated,the horizontal deformation of the retaining wall and soil ground, the axial force of the brace in succession stages are forecasted.