细粒含量对舟山砂动力特性的影响  

Effect of Fine Particle Content on Dynamic Properties of Zhoushan Sand

作　　者：季鹏越 张明霞 王晋宝 王亚军 JI Pengyue;ZHANG Mingxia;WANG Jinbao(School of Naval Architecture and Maritime of Zhejiang Ocean University,Zhoushan 316022;School of Civil Engineering of Zhejiang Ocean University,Zhoushan 316022,China)

机构地区：[1]浙江海洋大学船舶与海运学院,浙江舟山316022 [2]浙江海洋大学海洋工程装备学院,浙江舟山316022

出　　处：《浙江海洋大学学报（自然科学版）》2023年第5期455-462,共8页Journal of Zhejiang Ocean University：Natural Science

基　　金：浙江省自然科学基金(LHY21E090003)。

摘　　要：砂土的动力特性参数可以用于指导建筑和岩土工程建设。主要研究了细粒含量(FC)对舟山砂动剪切模量的影响,探究了有效围压和细粒含量对其动力特性的影响。使用德国Wille共振柱测试系统进行了一系列试验,探究了不同试验条件下试样的小应变剪切模量G_(max),并利用修正哈丁模型对试验数据进行拟合。结果表明,动剪切模量随着细粒含量的增加并非呈线性变化,细粒含量会使得舟山砂的动剪切模量先减小后增大,临界细粒含量为30%左右。当FC小于30%时添加细粒将降低动剪切模量,当FC大于30%时添加细粒则会增加动剪切模量。此外,结合试验结果给出了预测舟山海相砂土最大动剪切模量的相关拟合参数及其修正公式,为其工程应用提供了客观依据。The dynamic characteristic parameters of sand can be used to guide construction and geotechnical engineering.This paper mainly studies the effect of fine particle content(FC)on the dynamic shear modulus of Zhoushan sand,and explores the effect of effective confining pressure and fine particle content on its dynamic characteristics.In this study,a series of tests were carried out using the Wille resonance column test system in Germany to explore the small strain shear modulus(G_(max))of samples under different test conditions,and the modified Harding model was used to fit the test data.The results show that the dynamic shear modulus of Zhoushan sand does not linearly change with the increase of fine particle content.The fine particle content will make the dynamic shear modulus of Zhoushan sand first decrease and then increase,and the critical fine particle content is about 30%.When FC is less than 30%,the dynamic shear modulus will be reduced by adding fine particles,and when FC is more than 30%,the dynamic shear modulus will be increased by adding fine particles.In addition,based on the experimental results,the relevant fitting parameters and their correction formulas for predicting the maximum dynamic shear modulus of Zhoushan marine sand are given in this paper,which can provide an objective basis for its engineering application.

关 键 词：舟山海砂 共振柱 细粒含量 动剪切模量 

分 类 号：P744.2[天文地球—海洋科学] TU435[建筑科学—岩土工程]