沉淀白炭黑配制透明土特性探究  

GEOTECHNICAL PROPERTIES OF PRECIPITATED-SILICA-MADE TRANSPARENT SOIL

作　　者：俞东伟[1] 童凯凯 蒋军[1] YU Dongwei;TONG Kaikai;JIANG Jun(College of Civil Engi. and Architecture,Zhejiang Univ.,Hangzhou 31000, China)

机构地区：[1]浙江大学建筑工程学院,杭州310000

出　　处：《低温建筑技术》2018年第5期123-126,共4页Low Temperature Architecture Technology

摘　　要：岩土工程中,土体变形测试,特别是土体内部变形测试一直是一个难题。近年来,透明土的推广,为全过程、全区域测量土体的变形和内部结构的变形提供了可能。但模型试验要求模型土和原状土相似,特别是土体强度、模量上的相似。本文通过对由沉淀白炭黑、15#白油以及EI溶液配制得到的软弱透明土进行固结试验与直剪试验,研究该软弱透明土应用于模拟真实软土的可行性。试验结果表明,以沉淀白炭黑为土骨架,15#白油与EI混合溶剂作为孔隙流体制作的软弱透明土,土体的强度特性和压缩系数与粉粘土特性相似,可以满足模型试验要求。In the area of geotechnical engineering,the measurement of soil deformation,especially inner deformation,has always been an important research topic. Recently,the development of transparent soil makes it possible to measure the deformation of the soil and its inner structure during thewhole process. In order to apply it in model test,it is very important to make sure that the simulativesoil is similar to natural soil,especially in strength and modulus. Direct shear,consolidation and plasticity index test in this study indicate that transparent soil which is made of 15^# mineral oil,organicsolvents and precipitated silica can substitute silty clay acceptably,considering that the strength characteristics and the coefficient of compressibility are similar.

关 键 词：透明土 固结试验 直剪试验 模型试验 

分 类 号：TU45[建筑科学—岩土工程]