复合地基下卧层沉降的黏弹性分析

Analysis of the Viscoelasticity of the Settlement of Sublayer of Composite Foundation

对复合地基的下卧层黏弹性沉降进行理论研究,将土体黏弹性特征引入复合地基下卧层沉降的计算中,选择三参数固体模型来描述土体本构关系,推导出了矩形截面均布荷载下复合地基下卧层沉降的黏弹性计算公式,并根据计算公式编制了相应的计算程序。工程实例验证表明,计算结果更接近于实测值,分析方法具有合理性。

This paper studies the viscoelastic settlement of the underlying layer of composite foundation.The viscoelastic characteristics of the soil were introduced into the settlement calculation of the underlying layer in the composite foundation.A three-parameter solid model was chosen to describe the soil constitutive relation.The viscoelastic formula for the settlement of the underlying foundation under the uniform distribution of rectangular loads is deduced,and the corresponding calculation program is compiled according to the calculation formula.The engineering example shows that the calculation result is closer to the measured value and the result is more reasonable.