摘要
海底土体在波浪作用下能否产生液化是海岸工程所关心的问题。借鉴地震液化判别使用的砂土液化判别方法,将海底粉质土波致液化的判别分为初判和复判2个阶段。初判以所致海床土体发生破坏的临界循环应力比界限指标来判别,以土质基本特征和波浪条件为参数,对某海域海底液化形成判断;复判以波致海床土体中剪应力与实际土体的动剪切强度比较来判别。结合已有研究成果给出了波致土体液化判别的具体方法。
The wave-induced liquefaction of submarine sediment is a key issue to coastal engineering.Referring to the discrimination of sandy soil liquefaction caused by earthquake,the discrimination of submarine silty soil liquefaction is divided into two steps,i.e.primary discrimination and secondary discrimination in this paper.The critical ratio of cyclic stress,which leads to the liquefaction,is the criteria for primary discrimination,using soil basic features and wave conditions as parameters.Waveinduced shear stress of sediment is compared with the shear strength of sediment in the secondary discrimination.Combined with available research result,specific discrimination method for wave-induced liquefaction is presented in this paper.
出处
《海洋地质前沿》
2015年第3期43-48,共6页
Marine Geology Frontiers
基金
国家自然科学基金(41076021)
国家海洋局海洋公益性行业科研专项项目(201005005-6)
关键词
粉质土
海底
液化
临界循环应力比
silty soil
seafloor
liquefaction
critical ratio of cyclic stress
