隧道掌子面岩体完整性系数快捷测试布置方法研究

Research of the Arrangement Method for Quick Testing Rock-mass Integrity Index on Tunnel Face

  • 摘要: 为满足隧道施工期间掌子面围岩完整性快捷判定的需要,文章分析了岩块(体)波速现场快捷测试布置的原则,结合国内主流规范标准,采用对比法剖析了岩体结构面间距的划分标准,采用数学分析法研究了岩体完整性与结构面间距的量化关系。基于此,文章首次提出了岩块波速与岩体波速测试应遵守的声波对穿距离的控制标准Dr和Dm,并对测区、测点的布置方法及接收换能器系统进行了设计。结果表明,该测试方法在满足对整个掌子面和不同产状结构面全局把控的前提下,实现了测试快捷的目的。

     

    Abstract: Aiming at the need of quick determination of surrounding rock integrity on tunnel face during construction, this paper studied the quick test arrangement principles of rock-mass wave velocity. Based on the domestic main standards and specifications, the criteria for spacing of rock mass structural plane was analyzed by correction method and quantitative relationship between rock mass integrity and the spacing of structural plane was studied with mathematical analysis. The control standards Dr and Dm of acoustic wave penetration distance which should be complied by wave velocity and test of rock mass were proposed. The arrangement methods for measuring area and measuring points and the receiving transducer system were designed.

     

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