标准击实曲线的理论分析和应用

Two theoretical methods of determining the highest dry density and the optimal moisture content and the application

通过对标准击实曲线的理论分析,提出2种方法确定最大干容重(ρdmax)和最佳含水量(wop),并给出更为合理的解释和推荐方案。由于使用规程规定采用以干容重为纵坐标和含水量为横坐标,绘制干容重和含水量的关系曲线(图解法)易导致曲线峰值出现的主观性和随意性,进而引起因密实度问题而出现的质量事故。因此,文章提出的方法是可行的,有利于在土木工程中得以推广和应用,也是对现行规程的补充和改进。

The highest dry density and the optimal moisture content has been determined based on the relation curve of dry density and moisture content according to the related current specification,but it is easy to give rise to individual subjectivity in judging the peak value,which may result in quality accidents due to the incorrect value of density. In this paper,the regression analysis method and the numerical analysis method are presented for the determination of the highest dry density(ρ_(dmax)) and the optimal moisture content(w_(op)). Practical application shows that the presented methods are feasible and can be applied widely in the civil engineering,and the numerical analysis method is more simple. The given methods are a complement to the current specification and also an improvement.