基坑分层开挖扰动位移时效特性相似模型试验研究

Similarity Model Test Study on Time-dependent Characteristics of Disturbed Excavation in Layered Excavation of Foundation Excavation

依据软土地层典型基坑开挖背景,通过三维相似模型试验,系统研究了基坑分层开挖过程周边土体扰动位移空间分布、时效关系及其开挖步段的阶段性特征。通过试验数据回归模拟,建立了土体蠕变位移、累计位移时变关系及基坑断面竖向位移空间分布等的定量计算方法。

Based on the typical foundation excavation excavation of the soft soil layer,the spatial distribution of soil disturbance displacement,the aging relationship and the stage characteristics of the excavation step are systematically studied through the three dimensional similarity model test. Through the regression simulation of experimental data,the quantitative calculation method of soil creep displacement,time-varying relation of cumulative displacement and the spatial distribution of vertical displacement of foundation excavation section is established.