Dynamic Characteristics Analysis on Wind-Blown Sand Ground under Dynamic Compaction Vibration

Jihui Ding, Jinguo Liang, Wei Wang

College of Civil Engineering, Hebei University, Baoding, China.
Ltd. of Research Institute of Construction & Investigation of Hebei, Shijiazhuang, China.

DOI: 10.4236/wjet.2014.23018                

Abstract

In the 6000 kN·m energy level dynamic compaction on Inner Mongolia wind-blown sand foundation treatment process, the dynamic characteristics and dynamic response are measured. Vibration action time, vibration main frequency, peak acceleration and peak velocity are analyzed. The vibration acting time is very short, the vertical average vibration acting time increases obviously with distance increasing, and the horizontal average vibration time does hardly change. The main frequency of vibration is at 4.60 - 24.90 Hz, which depends on the soil properties and soil layer distribution. The peak acceleration and peak velocity space distribution are similar. The maximum of horizontal acceleration peak is close to vertical velocity peak, and is near to 51 g under rammer. The maximum of horizontal velocity peak is close to vertical velocity peak, and is near to 54 m/s under rammer. The peak acceleration and velocity are rapidly attenuated, but the vertical peak acceleration and peak velocity are slowly attenuated than horizontal direction. The effective treating depth arrives 13 m for wind-blown wind, peak acceleration is 1.8 g or so, and peak velocity is 2.1 m/s or so. Horizontal treating range is 2.6 times of rammer diameter, and vertical treating range is 5.65 times of rammer diameter.

Keywords

Wind-Blown Sand Ground, Dynamic Compaction, Vibration Effects, Dynamic Characteristics, Field Experiment

Conflicts of Interest

The authors declare no conflicts of interest.

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