| 摘要: |
| 结合二灰碎石现场振碾特性，研究了振动压实仪（VVTE）及选型标准，提出了垂直振动试验方法（VVTM），并通过对比研究室内静压法（SPCM）、振动法及现场振碾方式对二灰碎石物理力学特性的影响，评价了不同试件成型方法优越性.结果表明：振动压实仪的工作频率为30Hz，名义振幅为12mm，工作质量为300kg时模拟效果最佳，振动120s时的最大干密度与现场所能达到最大干密度相等；垂直振动成型试件的力学强度与芯样强度之比可达90%，而静压法成型试件的力学强度与芯样强度之比不足52%；垂直振动成型试件的力学强度是静压成型试件的17倍以上.垂直振动法比静压法成型试件更能准确反映二灰碎石基层物理力学性能. |
| 关键词: 二灰碎石 垂直振动试验方法 振动参数 最大干密度 抗压强度 劈裂强度 |
| DOI：103969/jissn1007 9629201502029 |
| 分类号: |
| 基金项目:陕西省交通科技项目（12 12K） |
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| Evaluation of Vertical Vibration Test Method of Lime Fly Ash Stabilized Aggregate |
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JIANG Yingjun1, YANG Xiurong2, LI Ningfang1, ZHANG Yi3, DONG Xin3
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1.Key Laboratory for Special Area Highway Engineering of Ministry of Education, Changan University,Xian 710064, China;2.Bureau of Transport of Tongchuan, Tongchuan 727031, China;3.Quality Supervision Station of Shaanxi Provincial Communications Department, Xian 710075, China
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| Abstract: |
| Combined with the actual vibratory rolling characteristics of lime fly ash stabilized aggregate, the vertical vibration compaction equipment（VVTE） and its selection standard were established and the vertical vibration test method（VVTM） was proposed. The effect of indoor static pressure compaction method（SPCM）, VVTM and vibratory rolling method in site on physical and mechanical properties of lime fly ash stabilized aggregate was compared. The different compaction methods were evaluated. The results show that when the working frequency is 30Hz, the nominal amplitude is 12mm and the working quality is 300kg, the simulation result is optimal. When the vibratory time is 120s, the vibratory maximum dry density is equal to the site maximum dry density. The mechanical strength of VVTM specimens is 90% of the sample of site. However， the mechanical strength of SPCM specimen are less than 52% of sample of site. The strength of specimens formed by VVTM is 17 times of that formed by SPCM. The specimens formed by VVTM can reflect the physical and mechanical properties of lime fly ash stabilized aggregate more accurately than the formed by SPCM. |
| Key words: lime fly ash stabilized aggregate vertical vibration test method vibration parameter maximum dry density compressive strength splitting strength |
