振动压实填石路堤动力响应试验研究

陈爱军;张家生;贺建清;王志斌

振动与冲击 ›› 2014, Vol. 33 ›› Issue (20) : 151-156.

PDF(1963 KB)
PDF(1963 KB)
振动与冲击 ›› 2014, Vol. 33 ›› Issue (20) : 151-156.
论文

振动压实填石路堤动力响应试验研究

  • 陈爱军1,2,张家生1,贺建清3,王志斌3
作者信息 +

Experimental study on dynamic response of the vibratory compaction rockfill embankment

  • CHEN Ai-jun1,2,ZHANG Jia-sheng1,HE Jian-qing3,WANG Zhi-bing3
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文章历史 +

摘要

对贵州三穗-黎平高速公路风化板岩路堤试验段路基不同深度埋设动土压力盒,用两种重型压路机振动压实测试不同深处竖向、水平动力响应。结果表明,振动波在土中近距离传播时频率基本保持不变或略有降低,土粒在动应力作用下处于加压-卸载的循环过程;大功率压路机对表层土产生明显推挤作用并造成表层填料松散;动应力在土中以一定角度向下扩散,不同压路机扩散角亦不同;据波动理论推导所得动应力在土中随深度以指数函数衰减获得试验数据验证,竖向动应力衰减系数是水平动应力衰减系数的2倍;超大功率压路机产生的动应力水平远大于重型压路机,重型压路机在土中局部产生共振现象;实测动侧压力系数非固定值且随深度增加线性增大。

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.

关键词

振动压实 / 填石路堤 / 动应力 / 现场测试

Key words

vibratory compaction / rockfill embankment / dynamic stress / field testing

引用本文

导出引用
陈爱军;张家生;贺建清;王志斌. 振动压实填石路堤动力响应试验研究[J]. 振动与冲击, 2014, 33(20): 151-156
CHEN Ai-jun;ZHANG Jia-sheng;HE Jian-qing;WANG Zhi-bing. Experimental study on dynamic response of the vibratory compaction rockfill embankment[J]. Journal of Vibration and Shock, 2014, 33(20): 151-156

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