【摘要】 随着城市高层建筑的大量兴建与地下空间开发利用规模的加大,随之出现了大量的深基坑工程。针对深基坑支护结构变形的复杂性与变形控制的重要性,结合实际深基坑工程,首先利用三轴试验,测得土体在不同含水率情况下的抗剪强度参数。而后以此为基础,应用PLAXIS软件建立了有限元分析模型,进行了非饱和土深基坑支护结构变形的数值模拟计算,总结出非饱和土深基坑支护结构的变形特性与规律,这为非饱和土深基坑工程的设计与施工提供了参考。更多还原

【Abstract】 With the large number of urban high-rise building construction and the increasing scale of underground space exploitation,deep foundation pits have been widely used in engineering practice.Aiming at the complexity of retaining structure deformation and the importance of deformation control in deep foundation pits,combined with the real deep foundation pit,the shear strength parameters under different water content soils were experimented through the triaxial tests. The finite element analysis model was established using the PLAXIS software based on those shear strength parameters.The numerical simulation calculation of the deformation characteristics of deep foundation pits in unsaturated soil was done.The deformation characteristics and laws were put forward.It could offer reference to the design and construction of deep foundation pits in unsaturated soil.更多还原