摘要
利用双向土工格栅对源自强风化红砂岩的粉砂土进行加筋,对压实度分别为90%,95%,100%以及加筋层数分别为0,1,2,3,5的数组土样完成了室内回弹模量试验工作。总结并分析了双向土工格栅加筋层的布设位置、加筋层数、土的压实度等对回弹模量的影响规律。试验结果表明,在合适的加筋方式和加筋层数以及较高的压实度下,可以获得较高的回弹模量。这表明利用双向土工格栅加筋技术实现公路桥台台背与桥头路堤间刚柔的平顺过渡,从而达到控制桥头跳车的目的是可能的。
A silty sand made from a seriously decayed red sandstone was reinforced by biaxial geogrid. A number of samples of this reinforced soil with 0, 1, 2, 3, or 5 reinforcement layers at 90 %, 95 % or 100 % of compaction degrees were used to measure their modulus of resilience in laboratory. The relationships were concluded between the resilient modulus of the reinforced soil and the location and the number of the reinforcement layers and compaction degree of the soil. It is proved by the test results that a greater modulus of resilience may be obtained when a proper location and a rational number of the reinforcement layers are applied to reinforce the soil with a high degree of compaction; and it is shown a smooth connection may be achieved between the rigid abutment and the soft subgrade soil by using biaxial geogrid to reinforce the embankment of bridge approach. Therefore, the bump at bridge-head may be controlled.
出处
《岩土力学》
EI
CSCD
北大核心
2008年第3期759-763,共5页
Rock and Soil Mechanics
基金
湖北省交通厅交通科技项目(No.2005-361-25-3)
关键词
双向土工格栅
加筋土
回弹模量
室内试验
biaxial geogrid
reinforced soil
modulus of resilience
test in laboratory
