淤泥质砂土抗液化性能的动三轴试验研究  

Dynamic Triaxial Test Investigation of Silty Sand Anti-liquefaction Performance

作　　者：黄宣维 童华炜[1] 李树斌[1] HUANG Xuan-wei;TONG Hua-wei;LI Shu-bin(School of Civil Engineering,Guangzhou University,Guangzhou 510006,China)

机构地区：[1]广州大学土木工程学院,广州510006

出　　处：《科学技术与工程》2018年第18期252-256,共5页Science Technology and Engineering

基　　金：国家自然科学基金(51778159)资助

摘　　要：通过分别对不同配比的重塑淤泥质砂土试样进行室内动三轴试验,以进行淤泥质砂土抗液化性能的研究,探究砂颗粒粒径、颗粒级配和淤泥含量对淤泥质砂土抗液化性能的影响。研究结果表明:当粒径单一时,其抗液化性能随粒径的增大而增大;当为两种以上颗粒级配时,颗粒粒径跨度较大的级配不利于抗液化,连续的颗粒级配有利于抗液化;淤泥含量为影响其抗液化性能的重要因素,10%左右淤泥含量时抗液化能力最差,在此基础上增大或减小淤泥含量均增强其抗液化能力。In order to research silty sand liquefaction resistance,exploring the sand particle size,particle distribution,and silt content on the properties of silty sand liquefaction resistance,indoor tests of anti-liquefaction properties in different ratio of reshape silty sand specimen respectively by dynamic triaxial apparatus are studied.Tests indicate that,when the particle size is single,its anti-liquefaction performance increases with the increase of particle size.When two or more granules are fitted,the grading of larger particle size span is unfavorable to anti-liquefaction,and continuous particle grading is conducive to anti-liquefaction.The silt content is an important factor affecting its anti-liquefaction performance,and the anti-liquefaction ability is the worst in about 10%of the silt content,which enhances its anti-liquefaction ability by increasing or decreasing the silt content.

关 键 词：淤泥质砂土 抗液化性能 动三轴试验 颗粒粒径 颗粒级配 淤泥含量 

分 类 号：TU441.4[建筑科学—岩土工程]