加筋层数对土工格栅加筋粘土土体变形及强度的影响  

Study on the Geogrid Reinforced Clays Consolidated Undrained Triaxial Test

作　　者：韩志型[1] 刘德贵 姜兵[1] 

机构地区：[1]西南科技大学土木工程与建筑学院,四川绵阳621010 [2]重庆科技大学城市科技学院,重庆永川402192

出　　处：《西南科技大学学报》2008年第4期25-28,共4页Journal of Southwest University of Science and Technology

基　　金：四川省教育厅自然科学基金资助项目(2005A136)

摘　　要：对土工格栅加筋粘土进行了固结不排水三轴压缩试验以研究加筋粘土的力学特性。试样含水率22．5％，布置的筋材层数分别为0—4层，围压分别为100、200、300kPa。试验结果表明，在粘土中加入土工格栅，可以有效约束试样的侧向变形，提高粘土的峰值强度，提高抗剪强度指标c、ψ值。试验结果同时反映出并不是筋材布置层数越多力学效果就越好，布置2层筋材的试样优于布置3或4层筋材的试样。Based on the consolidated undrained triaxial compression test, the geogrid reinforced clays was researched. In the test, there were 0 -4 reinforcement layers in samples and water content was 22.5% in each sample. Confining pressures were 100,200 and 300 kpa for each test. The test results and analysis show that when the geogrid are buried in the clay, the lateral deformations are confined, the strength of the geogrid reinforced clays increase, and the index of shearing strength c and ψ also increase. But the test results also indicate that though more reinforcement layers are, the influence of the reinforcement may be not better. The reinforcement effect of two geogrid layers in sample is bettet than fours geogrid layers in sample.

关 键 词：土工格栅 加筋粘土 三轴压缩试验 

分 类 号：TU411.3[建筑科学—岩土工程]