仿冲击振动压实规律

利用自主设计的仿冲击振动压实装置,选取21种试验工况,分别调节各影响参数,进行了多组压实试验。试验结果表明,土壤的压实度和表面沉降量之间存在一定的对应关系,且与碾压遍数有着某种内在的变化规律;在压实的前几遍,相对沉降量越大,则对应的压实度增加幅度也越大,而后期压实过程中,沉降量减小的趋势与压实度增大的趋势相似,并分别趋于某稳定值。根据压实度变化的一般规律及仿冲击振动压实试验离散点曲线,建立了压实度与压实遍数之间的函数关系式。采用Matlab编程,分别对21种工况及4种型号的压路机现场试验数据进行了验算,结果表明,计算值与实测值很接近,相对误差为0.2%~6%。

Compaction law of impact-like vibration

This paper selects 21 kinds of working situation and makes a lot of compacting experiments basing on impact-llke vibratory roller by self-design. The experiments show that there are correspondent relationships between the compaction degree and the subsidence of soil, and the compaction times is related also. In the initial compaction with some times, the more the subsidence range of soil is large, the more the increase of compaction degree is large. But in latter process of compaction, the tendency of reduction of subsidence range is same with the increase of compaction degree, and they tend to the stable value. According to the vary law of compaction degree and dispersed curves of experiments, this paper establishes the function to describe the relationship between the compaction degree and compaction times, and checks the experiment data of 21 kinds of working situation and 4 types of the vibratory roller using Matlab programming. The results shows that the calculating values approach the measuring values, the range of relative error is from 0.2% to 6%. 3 tabs, 6 figs, 10 refs.