波致粉质土液化过程中物理力学性态变化试验研究  

EXPERIMENTAL STUDY ON THE PHYSICAL AND MECHANICAL CHARACTERISTICS CHANGES OF WAVE-INDUCED LIQUEFIED SILT

作　　者：王刚[1,2] 许国辉[1,3] 刘志钦[1,3] 刘会欣[2] 孙振红[1,3] 

机构地区：[1]海洋环境与生态教育部重点实验室,青岛266100 [2]河北省地矿局秦皇岛矿产水文工程地质大队,秦皇岛066000 [3]中国海洋大学环境科学与工程学院,青岛266100

出　　处：《海洋地质与第四纪地质》2017年第1期176-183,共8页Marine Geology & Quaternary Geology

基　　金：国家自然科学基金--海底粉质土液化重建地层特征及其风暴浪动力强度研究;国家海洋局海洋公益性行业科研专项--近海底灾害预测评价及防控关键技术研究

摘　　要：粉质土底床在波浪作用下发生液化,发现有液化发展和液化沉积两个过程。以粉质土铺设底床开展波浪水槽试验,通过测试贯入阻力、含水量、密度、中值粒径和黏粒含量在液化过程中随时间的变化,给出粉质土在液化过程中物理力学性质的变化规律。试验给出:总体上,粉质土底床液化层在液化发展过程中强度急剧降低,含水量增加,密度减小,中值粒径增大,黏粒含量减少;在液化沉积(固结)阶段强度增大,含水量减小,密度增大,中值粒径增大,黏粒含量减少。Silty seabed would liquefy under wave action and this process includes two stages, liquefaction development and liquefaction deposits. In this paper, a wave flume experiment is made on a sediment bed consisting of silty soil for acquiring the data on variation in water content, clay content, median grain size, density and penetration resistance in the process of liquefaction in order to study the physical and mechani- cal properties changes in the liquefaction process. It is observed that the silty soil liquefaction development process is marked by the decrease in soil strength, soil density, median size and clay content, and increase in water content. During the liquefaction deposits process, however, the soil strength, soil density and median size increase, while the water content and content decrease.

关 键 词：液化 粉质土 流动性 水槽试验 波浪作用 

分 类 号：P642.1[天文地球—工程地质学]