Abstract: In order to study on the influence of rock content on soil-rock mixture compactness,a compactness test method in laboratory was designed through self-made test box.Firstly,based on the analysis of curves of soil-rock mixture settlement under different compaction energy,the soil-rock mixture standard tamping times under the existing experimental conditions was confirmed.Secondly,the soil-rock mixture compactness of different rock content under standard tamping times was counted,the change curve of soilrock mixture compactness with different rock content was analysed,and the linear regression model was raised.In the end,the earth pressure cell was used to verify the stress uniformity in soil-rock mixture under tamping test,the test reliability was ensured.The results show that this method is not only suitbale for the compactness test of soil-rock in laboratory,but also reduces the impact of compactness deviation because of rock discreteness in soil-rock mixture.The method has certainly guiding significance for engineering.

Key words: road engineering, soil-rock mixture, rock content, degree of compaction, laboratory test

摘要： 为了研究含石率对土石混填料压实度的影响,通过自制试验箱设计了一种室内检测方法。首先,通过分析试验箱中土石混填料在不同压实功下沉降量的变化曲线,确定现有试验条件下土石混填料的标准夯击次数;然后,对标准夯击次数下不同含石率的土石混填料密度进行统计,分析土石混填料压实度随含石率的变化曲线,建立线性回归模型;最后,利用土压力盒验证夯击试验下土石混填料内部应力分布的均匀性,确保试验方法可靠。结果表明,此方法不仅适用于土石混填料的室内压实度检测,而且可以通过含石率修正表减小因土石混填料中石料分布离散性而导致的压实度产生偏差的影响。该方法对于工程施工具有一定的指导意义。

关键词: 道路工程, 土石混填料, 含石率, 压实度, 室内试验