宽级配砾质土三轴渗透试验研究  

Experimental Study on the Triaxial Permeability of Broadly Graded Gravelly Soil

作　　者：李方振[1,2] 柳侃 陈志波[2,3] 

机构地区：[1]福建省地质工程勘察院福建省地质灾害重点实验室,福州350002 [2]福州大学环境与资源学院,福州350108 [3]福州大学岩土工程与工程地质研究所,福州350108

出　　处：《长江科学院院报》2016年第1期126-129,133,共5页Journal of Changjiang River Scientific Research Institute

基　　金：国家自然科学基金项目(41102167);福州大学科技发展基金资助项目(2011-XQ-12)

摘　　要：为研究宽级配砾质土的渗透特性,对不同砾石含量的宽级配砾质土进行了一系列的三轴渗透试验。试验结果表明:随砾石含量的增加,宽级配砾质土的结构分别为悬浮-密实、密实-骨架、骨架-空隙3种形式;随砾石含量的增大,渗透系数呈现出先略微减小然后逐渐增大、最后迅速增大的变化规律;含水率、干密度均对宽级配砾质土的渗透系数有较大的影响;在最优含水率左右,渗透系数有明显的差异,施工中应注意对含水率控制。In order to study the permeability characteristics of the broadly graded gravelly soil,triaxial seepage tests in the presence of different gravel contents. The test results show that,with the increasing gravel content,the structure types of the broadly graded gravelly soil can be divided into three different kinds,including suspend-dense structure,dense-framework structure and framework-pore structure. When the gravel content increases,the permeability coefficient decreases slowly first,then increases slowly,and increases quickly finally. Dry density has main influence on permeability coefficient,so does the moisture content. The permeability coefficient is obviously different near the optimum moisture content,so we should pay attention to controlling the moisture content in construction.

关 键 词：宽级配砾质土 三轴渗透试验 干密度 含水率 渗透系数 砾石含量 

分 类 号：TU411.4[建筑科学—岩土工程]