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刘东海, 王倩, 崔博, 沈嗣元, 刘兴宁, 王奇峰. 连续监控下土石坝碾压参数的控制标准及其确定方法[J]. 岩土工程学报, 2013, 35(9): 1712-1716.
引用本文: 刘东海, 王倩, 崔博, 沈嗣元, 刘兴宁, 王奇峰. 连续监控下土石坝碾压参数的控制标准及其确定方法[J]. 岩土工程学报, 2013, 35(9): 1712-1716.
LIU Dong-hai, WANG Qian, CUI Bo, SHEN Si-yuan, LIU Xing-ning, WANG Qi-feng. Control standards for compaction parameters of earth-rock dams under continuous construction process monitoring[J]. Chinese Journal of Geotechnical Engineering, 2013, 35(9): 1712-1716.
Citation: LIU Dong-hai, WANG Qian, CUI Bo, SHEN Si-yuan, LIU Xing-ning, WANG Qi-feng. Control standards for compaction parameters of earth-rock dams under continuous construction process monitoring[J]. Chinese Journal of Geotechnical Engineering, 2013, 35(9): 1712-1716.

连续监控下土石坝碾压参数的控制标准及其确定方法

Control standards for compaction parameters of earth-rock dams under continuous construction process monitoring

  • 摘要: 为适应连续监控下土石坝施工中对碾压参数的控制要求,提出将行车速度持续超速时间、激振力持续不达标时间、压实厚度及碾压遍数合格率作为施工全仓面碾压参数的控制指标;并在分析各碾压参数与心墙坝料压实度之间相关性的基础上,建立了碾压遍数、压实厚度、料性参数(坝料含水率和级配)与压实度的多元回归模型;进而提出了满足现行规范要求的坝料压实质量所对应的、基于Monte-Carlo法的碾压遍数合格率控制标准的确定方法。工程实例分析表明,遵循所提出的碾压参数控制标准,心墙区试坑检验的坝料压实度均满足设计要求,从而为连续监控下土石坝碾压质量的控制提供了有效途径。

     

    Abstract: In order to meet the needs of compaction parameter control for construction of earth-rock dams under continuous process monitoring, the sustained over-speed duration time of roller velocity, continued non-qualification duration time of vibration status, compacted thickness and qualification rate of compaction pass are employed as the control indices of compaction quality of the entire working area. According to the correlation between the compactness of core wall materials and each of compaction parameters (e.g., compaction pass, compacted thickness, and gradation of materials moisture content), a multiple regression model is established. Furthermore, a Monte-Carlo simulation-based method is presented to determine the control standards for the qualification rate of compaction pass which meets the corresponding compaction quality control standards required in the current codes. The case study demonstrates that the compaction quality of all sampling pits in the core wall zone satisfies the design requirements according to the proposed control standards. It may provide an effective approach for compaction quality control of earth-rock dams under continuous construction process monitoring.

     

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