Continuous compaction quality control technology of silty mudstone subgrade
The strength of silty mudstone particles varies greatly,and the compaction quality is difficult to control.Based on the structural dynamics method,the relationship between the vibratory wheel of the roller and the resistance response of the subgrade fill body is analyzed.The vibration acceleration signal of the vibratory wheel during the compaction process is collected by the field test section,and the fundamental frequency amplitude and the first harmonic amplitude are obtained by the fast Fourier transform,and the continuous vibration compaction value(CMV)is obtained.The correlations between compaction degree,settlement amount,bending value and CMV value under different vibration compaction times were compared and analyzed.The results show that the CMV value increases gradually with the increase of compaction times,and there is a good correlation between the CMV value and FWD dynamic bending value,compaction degree and accumulated settlement amount.Based on this,the CMV control value of silty mudstone embankment is proposed,and the research results are helpful to the continuous compaction quality control of silty mudstone embankment.
万方数据
维普
