加筋粗粒土静动力三轴试验的研究进展

Research Progress on Static and Dynamic Three Axis Test of Reinforced Coarse-grained Soil

坝顶加筋是一种经济有效的高土石坝抗震加固措施,其效果可利用静动力大三轴试验来进行验证。加筋粗粒土静力大三轴试验结果表明加筋粗粒土的加固效果可利用"等效附加围压原理"进行解释,加筋效果与加筋材料强度、土体填料密实度、加筋层数和围压等因素有关。加筋粗粒土动力大三轴试验结果加筋粗粒土与素粗粒土的残余变形的发展规律基本一致,加筋可抑制粗粒料的残余剪切变形和残余体积变形。

The reinforced is an economical and effective reinforcement measures of high rockfill dam earthquake,the effect can be verified by static dynamic triaxial test. The results of static triaxial test of reinforced coarse grained soil show that the reinforcement effect of reinforced coarse grained soil can be explained by the principle of equivalent additional confining pressure. The reinforcement effect is related to the strength of reinforced material, the density of soil filler, the number of reinforcement layers and confining pressure. The dynamic triaxial test results of reinforced coarse grained soil are basically the same as the residual deformation of reinforced coarse grained soil and coarse grained soil.Reinforcement can restrain residual shear deformation and residual volume deformation of coarse grained soil.