基于Hardening-Soil模型基坑支护变形特性研究

在基坑开挖的模拟分析中,考虑土体的卸荷膨胀及加载硬化等性质,选用一种更适用于土体开挖的Hardening-Soil本构模型,对深基坑开挖阶段支护结构变形特性进行了数值模拟,计算得出不同开挖阶段的内支撑的轴力变化、围护桩的力矩变化、以及桩的水平位移的变化,计算结果很好地反映了土的特性,为工程设计与施工提供了依据。

Study on the Deformation Characteristics of Foundation Pit Support Based on Hardening-Soil Model

Considering the characters of soils,such as expanding when unloading and hardening when loading,constitutive model Hardening-Soil which is more applicable to soil body was adopted to simulate the deformation of supporting structure of a deep foundation pit at excavation stage.By calculating the axial force change of internal bracings,the torque change of retaining piles and the horizontal displacement of piles at different stages of excavation were presented out.The calculated results reflected the characters of soil body well,provided a reference for the engineering design and construction.