Vibration response of double-layered foundation with saturated-unsaturated soils under the action of vibratory roller

WANG Li-an; ZHANG Jia-wei; LI Kui-kui; LIU Sheng-wei

doi:10.16285/j.rsm.2020.1824

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Vibration response of double-layered foundation with saturated-unsaturated soils under the action of vibratory roller

更新时间：2026-06-25

- Vibration response of double-layered foundation with saturated-unsaturated soils under the action of vibratory roller
- Vol. 42, Issue 11, Pages: 3182-3190(2021)
- 作者机构：
  
  1. 兰州交通大学土木工程学院,甘肃,兰州,730070
  2. 兰州交通大学文化遗产保护工程技术研究所,甘肃,兰州,730070
- 作者简介：
- 基金信息：
- DOI：10.16285/j.rsm.2020.1824
  CLC： U415.521
- Online First：12 November 2021，
  
  Published：2021
- 稿件说明：
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WANG Li-an, ZHANG Jia-wei, LI Kui-kui, et al. Vibration response of double-layered foundation with saturated-unsaturated soils under the action of vibratory roller[J]. 2021, 42(11): 3182-3190.
DOI：

WANG Li-an, ZHANG Jia-wei, LI Kui-kui, et al. Vibration response of double-layered foundation with saturated-unsaturated soils under the action of vibratory roller[J]. 2021, 42(11): 3182-3190. DOI： 10.16285/j.rsm.2020.1824.

摘要

利用Shah和Heaviside阶跃函数描述振动压路机的动态激振作用，对上层为非饱和土，下层为饱和土的双层地基进行动力响应分析。采用三重Fourier变换求解饱和土与非饱和土的动力控制方程，推导出双层地基在变换域中的动力响应解。通过算例分析，研究了双层地基在振动压路机作用下的动力响应和参数影响规律。结果表明，压路机激振频率和名义振幅升高，地基的振动峰值将随之增大；当压路机行驶速度超过5 km/h时，地基的振动峰值逐渐增大并出现波动现象，其波动幅度取决于压路机的激振频率。此外，还考虑了饱和度对土体剪切模量和渗透系数的影响。研究发现，饱和度处于Sw0 ~1-Sw0区间时，土体具有较大的动刚度，地基振动位移减小。

Abstract

The Shah and Heaviside step functions are used to describe the dynamic excitation of the vibratory roller

and the dynamic response analysis of the double-layer foundation with the upper layer of unsaturated soil and the lower layer of saturated soil is carried out. The three-dimensional Fourier transform is used to solve the dynamic control equations of saturated and unsaturated soils

and the dynamic response solution of the double-layer foundation in the transform domain is derived. Through the analysis of numerical examples

the dynamic response of the double-layer foundation under the action of the vibratory roller and the influence of parameters are studied. The results show that the vibration peak value of the foundation will increase accordingly as the excitation frequency and nominal amplitude of the roller increase. When the speed of the road roller exceeds 5 km/h

the vibration peak value of the foundation gradually increases accompanied by fluctuation. The amplitude of the fluctuation depends on the excitation frequency of the road roller. In addition

this paper also considers the influence of saturation on soil shear modulus and permeability coefficient. The study also found that the soil has greater dynamic stiffness and the vibration displacement of the foundation decreases when the saturation is in the range of Sw0~1-Sw0.

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