基于PFWD的公路填石路基压实质量快速检测方法研究
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李盛(1980—),男,长沙理工大学教授

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U416

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国家重点研发计划项目(2018YFB1600200);国家自然科学基金项目(51878076);道路灾变防治及交通安全教育部工程研究中心开放基金资助项目(kfj180402)


Research on the rapid detection method of compaction quality of highway rockfill subgrade based on the PFWD
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    摘要:

    为提高填石路基压实质量的检测效率,以广连高速公路TJ09标段的填石路基路试验段为工程背景,分别采用PFWD和水袋法对填石路基的压实质量进行检测试验。建立填石路基的回弹模量、回弹弯沉与孔隙率之间的回归模型,探究PFWD应用于填石路基压实质量的快速检测。研究结果表明:回弹模量与孔隙率之间相关系数R2 大于 0.7,且两者具有良好的相关性;回弹模量的变异系数为16.7%,小于回弹弯沉的变异系数19.0%,回弹模量的离散程度比回弹弯沉的小,更稳定。PFWD的检测结果满足现行规范要求,可用于填石路基工程压实质量的快速检测。

    Abstract:

    In order to improve the detection efficiency of the compaction quality of rock fill subgrade, the portable falling weight deflectometer(PFWD)and water bag method was used,based on the representative rock fill subgrade at the TJ09 test section of the Guangzhou Lianyungang Expressway. The regression model for the resilience modulus,resilience deflection and porosity of rock fill subgrade was established. The rapid method of the PFWD was explored to detect the compaction quality of rock fill subgrade.The results show that the correlation coefficient(R2 )between the resilient modulus and porosity is greater than 0.7,and them show a good correlation. The variation coefficients of of the resilient modulus and the resilience deflection are 16.7% and 19.0%,respectively. Those indicate The dispersion degree of resilient modulus is smaller and more stable than that of rebound deflection.The PFWD is proposed as a fast method for the detection of compaction quality of stone-filled roadbed

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李盛,郜梦棵,刘玉龙,等.基于PFWD的公路填石路基压实质量快速检测方法研究[J].交通科学与工程,2022,38(4):10-15.
LI Sheng, GAO Mengke, LIU Yulong, et al. Research on the rapid detection method of compaction quality of highway rockfill subgrade based on the PFWD[J]. Journal of Transport Science and Engineering,2022,38(4):10-15.

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  • 在线发布日期: 2023-01-05
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