期刊论文

Experimental on road performance and cyclic dynamic stress of coarse-grained soil subgrade

中文

长安大学学报(自然科学版)

1671-8879

2019

39

2

27-34

10.19721/j.cnki.1671-8879.2019.02.004

51678073:国家自然科学基金 51508042:国家自然科学基金

本校为第一机构

为了研究粗粒土路堤在动力荷载及雨水湿化作用下的路用性能,以粗粒土为研究对象,开展室内常规物理力学试验,分析压实度、干密度以及含水率对粗粒土填料回弹模量的影响;利用大型动三轴试验仪研究不同压实度和围压条件下轴载作用次数与动态回弹模量之间的关系,以压实度和含水率为条件变量对粗粒土试件进行永久变形试验,探讨循环动应力作用下粗粒土试件轴向累计轴向应变的发展规律。试验结果表明:压实度和含水率对粗粒土的物理力学特性影响较大,但对干密度影响较小;试件累计轴向应变随着压实度增大而减小,当压实度为90%时,试验前期累计轴向应变增加幅度较小,当累计轴载次数达到1 000时,累计轴向应变...

To determine the road performance of coarse-grained soil subgrade under a dynamic load and wet rain, coarse-grained soil was took as the research object, and the influence of the compaction degree, dry density, and moisture content on the modulus of resilience of coarse-grained soil was analyzed. This was based on conventional physical and mechanical laboratory experiments. At the same time, the relationship between the number of axial loads and the dynamic elastic modulus under different compaction degrees and confining pressures was studied u...