基于预测公式的简化“三点”击实试验方法

A simplified “three-point”compaction test method based on prediction formula

室内击实试验是确定粘性土最大干密度的主要方法,总结了已有提高击实试验效率的方法,认为李君纯提出的统计法具有普适性;在已有试验数据基础上提出了现场干密度与最大干密度的经验公式,最后基于现场干密度—最大干密度经验公式和李君纯提出的统计法预测最优含水率提出了简化"三点"击实试验方法,该方法缩小了最优含水量的范围,降低了试验补点的可能性,减少了试验工作量,精度较高。

The compaction test is the main method to determine the maximum dry density of cohesive soil.This paper summarizes the existing methods to improve the efficiency of compaction test,and thinks that the statistical method proposed by Li Junchun has universality,then establishes an empirical formula between dry density and maximum dry density based on series of experimental data.Finally,a simplified“three-point”compaction test method was proposed which combines the empirical formula between dry density and maximum dry density and the statistical method proposed by Li Junchun to predict the optimal water content,and it narrows the range of the optimal water content,lowers the possibility of the test filling point,reduces the test workload,and has higher accuracy.