高速铁路粗粒土最大干密度试验方法研究

Research on Test Method for Maximum Dry Density of Coarse-grained Soil in High Speed Railway

针对我国高速铁路路基压实标准的物理指标统一采用压实系数K控制的规定,分析了粗粒土最大干密度的各类试验方法与国内外现行标准,从原理、适用范围、技术参数等方面进行探讨,在高速铁路路基施工现场展开试验研究,提出采用表面振动压实法作为高速铁路粗粒土的最大干密度试验方法,并提出了试验建议。

Based on the provision that unified compaction coefficient K has been used for China high speed railway subgrade to control the compaction quality, this paper analyzes various test methods and standards at home and abroad for the maximum dry density of coarse-grained soil, and makes comparison on theory, scope of application and technical parameter, etc. On the basis of experimental research on the compaction coefficient for coarse-grained soil of high speed railway, this paper proposes the method of surface vibration test to control the compaction quality of high speed railway subgrade, and puts forward some test suggestions.