压实度和含水量对于压实黄土力学特性的影响  

Influence of Compactness and Water Content on Mechanical Properties of Compacted Loess

作　　者：周勤 赵发章 张洪亮[3] 

机构地区：[1]甘肃省交通厅,兰州市730030 [2]甘肃省高等级公路建设开发有限公司,兰州市730030 [3]长安大学特殊地区公路工程教育部重点实验室,西安市710064

出　　处：《公路》2006年第1期67-70,共4页Highway

基　　金：交通部西部交通建设科技项目(2001-318-000-18)

摘　　要：通过压实黄土的室内回弹模量试验、湿陷试验、动三轴试验和抗剪强度试验,分析了压实度和含水量对压实黄土的静态回弹模量、附加压缩变形、动模量、动阻尼比和抗剪强度力学性质的影响。试验发现,在常用的95%的压实度基础上继续提高压实度对于提高压实黄土的回弹模量和抗剪强度仍然很有效;当压实度达到90%以后,压实黄土浸水以后产生的附加压缩变形基本可以消除。试验结果为黄土地区路基压实标准确定以及回弹模量、抗剪强度等取值提供了依据。Through indoor tests, the influence of compactness and the water content on the mechanical properties of compacted loess are analyzed, such as the rebound modulus, the collapsing deformation, the dynamic elastic modulus, the damping ratio and the shear strength. The tests show that the increase of compactness upon 95% will stillbe effective to the increase of the rebound modulus and the shear strength, and the collapsibility Of the compacted loess is little enough to be ignored if the compactness is greater than 90%. The test results provide bases for the determination of the compactness criterion and the acceptance values of the rebound modulus and the shear strength for the subgrade composed of loess.

关 键 词：压实黄土 压实度 含水量 力学特性 

分 类 号：TU411.3[建筑科学—岩土工程]