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| Experimental study on dynamic response of the vibratory compaction rockfill embankment |
| CHEN Ai-jun1,2，ZHANG Jia-sheng1，HE Jian-qing3，WANG Zhi-bing3 |
| 1. School of Civil Engineering, Central South University, Changsha 410075, China；2. School of Architecture Engineering, Hunan Institute of Engineering, Xiangtan 411108, China；3. School of Civil Engineering , Hunan University of science and technology, Xiangtan 411201, China |
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Abstract Vibratory compaction is commonly used compaction method in embankment, Dynamic response tests of vibratory compaction are the basis of vibration compaction mechanism study. For Sansui-Liping highway Weathered Slate embankment test section in Guizhou province, through buring earth pressure boxes at different depths in the embankment, Using two vibrating roller compaction, Vertical and horizontal dynamic response of different depth is tested in field. The results showed that: when the shock wave is propagating in the soil closely the frequency remained constant or decreased slightly, Soil particles is in pressure-unloading cycle under dynamic stress; Rollers for power generating topsoil and cause a significant role in pushing the loose surface filler, High-power roller produce significant push effect for topsoil and loose skin fillers; Dynamic stress diffuses in the soil down to a certain diffusion angle, different roller has different diffusion angle; according the wave theory getting the law that dynamic stress is decaying with depth natural numbers exponentially in the soil, the conclusion has been verified and the test data, the attenuation coefficient of vertical dynamic stress is twice the level of dynamic stress; Dynamic stress levels generated by super power roller are far greater than the heavy roller, heavy roller resonance phenomenon in the soil; Measured dynamic lateral pressure coefficient is not a fixed value, it Increases linearly with increasing depth.
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Received: 11 December 2013
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2014, Vol. 33 
