Oscillatory soil response and liquefaction in an unsaturated layered seabed
Oscillatory soil response and liquefaction in an unsaturated layered seabed
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DOI：
10.1002/nag.1610191202
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发表时间：
1995-12
影响因子：
4
通讯作者：
J. Hsu;D. Jeng;C. P. Lee
中科院分区：
文献类型：
--
作者：
J. Hsu;D. Jeng;C. P. Lee
在过去的三十年中，真实海床中波浪引起的土壤响应问题引起了岩土和海岸工程师的注意，并为此发展了一些基本理论。然而，在具有多个子层的海床中，理论上还没有对土壤液化进行评估，这些子层可以假设每一层内的土壤性质都是均匀的。本文提出了一种求解有限厚度非粘性层状海床在三维波浪作用下孔隙压力和有效应力的半解析方法。基于层状海床的数值结果，描述了土体特性（相对层厚、渗透比和剪切模量）对海床响应的影响。特别注意放置较粗的材料作为顶层以保护下层较细的沉积物的效果。虽然在本研究中只明确解决了三层海床，但概述的程序可以很容易地扩展到多层土壤系统。三维解也可应用于二维进行波或驻波系统。
The subject of wave-induced soil response in a real seabed has attracted the attention of geotechnical and coastal engineers over the last three decades, for which several basic theories have been developed. However, the evaluation of soil liquefaction has not been attempted theoretically in a seabed with multiple sub-layers, in which homogeneity in soil properties can be assumed within each layer. In this study, a semi-analytical approach is presented for obtaining solutions for the pore pressure and effective stresses in a non-cohesive layered seabed of finite thickness subject to a system of three-dimensional waves. Based on the numerical results for a layered seabed, influences of soil characteristics (relative layer thickness, permeability ratio and shear modulus) on seabed responses are described. Special attention is given to the effect of placing a coarser material as a top layer for protecting an underlayer of finer sediment. Although only a three-layered seabed is explicitly solved in this study, the procedure outlined can readily be extended to a multi-layered soil system. The three-dimensional solutions can also be applied to the two-dimensional progressive or standing wave systems.