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

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.