经编土工格栅加筋煤矸石的筋土界面特性试验研究

摘要

The interface strength and friction coefficient between warp geogrid and coal gangue has been gotten. The results show that; It is nonlinear that the relationship of shear stress and displacement gotten by coal gangue and warp geogrid direct shear tests and pullout tests; with the normal stress increased , shear stress peak value increases; the direct shear test curve is stable, and the drawing test for softening curve. With the compaction degree increased, the interface strength increases, and they conforms to the Mohr Coulomb strength type, the tested warp geogrid and coal gangue has good drawing friction characteristics.%以煤矸石为填料,经编土工格栅为筋材,进行了一系列直剪试验和拉拔试验,测试了经编土工格栅与煤矸石间的界面摩擦特性,获得了不同压实度煤矸石与经编土工格栅间的直剪和拉拔界面强度和摩擦系数,并进行了对比分析.试验结果表明:经编土工格栅加筋煤矸石的直剪和拉拔剪应力和位移的关系为非线性,剪应力峰值随法向应力的增加而增大,直剪试验曲线呈稳态型,而拉拔试验曲线为软化型.经编土工格栅与煤矸石的直剪界面强度均随煤矸石压实度的增加而增大,符合莫尔库仑强度型；经编土工格栅与煤矸石间有良好的拉拔摩擦特性.