Analysis on the Compressive Stress Signals from Vibrating Compaction on Loess

Abstract:

To discover the vibrating compaction mechanism and optimize the working parameters, the test on vibration compaction is designed and the compressive stress and the compaction energy on the loess during the vibrating compaction are studied. The distribution of the compressive stress is analyzed from the stress signals in time domain. And the distribution, absorption and transfer law of the compaction energy in the loess are analyzed from frequency spectrum of the compressive stress signals. The results show that the value of the compressive stress on every layer in the loess increases with the increasing of the rolling times and it decreases with the increasing of the depth. The compressive stress at the top layer increases most quickly, and arrives at its maximum value for the ninth rolling time. The middle and bottom layers both arrive at their maximum values for the eleventh rolling time. The natural frequency of the test loess is 30Hz. At this vibratory frequency, the compaction energy working at the loess is more adequate than that of the other frequencies. And the compaction effect is the best. The vibratory energy absorbed by every layer decreases with the increasing of the soil density. The top layer can get more energy than the middle and the bottom layers. It arrives at the density state firstly. The analysis is in accordance with the experimental results of the compactness.

• Periodical: Advanced Materials Research (Volumes 726-731)
• Pages: 3137-3143
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.726-731.3137
• Online since: August 2013
• Authors: Qing Zhe Zhang*, Jing Liang Dai, Bao Gui Yang, Ya Pan Zhao
• Keywords: Compressive Stress Signals, Frequency Spectrum Analysis, Road Engineering, Vibrating Compaction

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