土工格栅加筋红砂岩粗粒土的加筋机理研究

A Research of Reinforcement Mechanism of Geogrid with Red Sandstone Coarse-grained Soil

针对红砂岩粗粒土在不同加筋情况下,分别进行了不同围压条件的大三轴剪切试验。对各试样的抗剪强度特征和破坏形式进行了深入分析和比较,并以此为基础,对土工格栅加筋红砂岩粗粒土的加筋机理进行深入研究。指出加筋可以有效地提高红砂岩的黏聚力,但对摩擦角提高的贡献不大;同时指出工程设计与施工中,应尽量控制工程含水率在最佳含水率左右。

According to different reinforcement condition,red sandstone coarse-grained soil is made seperately large triaxial shear test under different confining pressure condition.On the basis of a deep analysis and comparison of shearing strength characteristics and damage types of each sample,the mechanism of geogrid with reinforcement red sandstone coarse-grained soil is studied and the cohesion can be improved effectively,but the friction angle cannot be increased largely.Furthermore,the project water content shall be controlled around the best one during the design and the construction.