【摘要】 通过侧向卸荷应力路径试验 ,分析了天然固结地基土在基坑开挖侧向卸荷过程中墙后土体的变形规律 ,根据双曲线假定 ,并引用Duncan Chang模型的计算参数推导了其模量公式。公式能够较真实地反映侧向卸荷应力路径上土体变形规律 ,其计算参数可以通过常规三轴试验获得 ,因而易于在实际工程中推广应用。更多还原

【Abstract】 A modulus formula for the foundation soil is proposed in the paper It is based on the hyperbola assumption,and through the lateral unloading stress path tests The deformation rule of the natural foundation soil behind the braced wall under lateral unloading during excavation is studied The Duncan?Chang models parameters are used in the proposed formula It is got from the standard test for the parameters It is found that the formula can reflect the deformation rule under unloading更多还原