岩质围岩施工阶段亚级分级的数量化理论研究

为了对隧道施工阶段的围岩分级进行客观评价，提高判定数据的可靠性，必需建立一套实用的施工阶段围岩亚级分级方法，为隧道施工阶段的围岩分级服务。考虑到目前采用的属性指标的实际情况，特采用数量化理论对施工阶段岩质围岩亚级分级进行定量评定。通过对国内外情况的调查统计，得到了公路隧道围岩亚级分级的指标体系；并依托工程实际情况，在72条隧道中采集了800余条样本，从中选出了500条数据进行分析，完成了以数量化理论为基础的施工阶段围岩亚级的定量判定方法研究，并通过工程实例对判定方法进行了检验。研究结果表明：岩质围岩施工阶段亚级分级指标为岩石坚硬程度、岩体完整性状态、地下水状态；建立的数量化分级判别方程和判别值的自检平均符合率超过85%；数量化理论在岩质围岩施工阶段亚级分级应用中具有较高的可靠性。

Study of quantification theory of rocky surrounding rock sub-classification during construction

To evaluate the rock classification, a useful rock sub-classification method is needed to eliminate the subjectivism and empiricism and to improve the precision of rock classification. Therefore taking into account of the attributes of the current indices, quantification theory is adopted to give the rocky surrounding rock quantitative evaluation. At first the index system was built on the basis of survey; then 500 data was gained from the more than 800 examples of 72 tunnels; thus the quantitative evaluation was achieved. Finally, through case studies, the judge method based on quantification theory was tested and a high precision and reliability is achieved. The research results show: The indices of rocky surrounding rock sub-classification during construction are rock hardness degree, rock mass integrity condition and ground water condition. Self-check coincidence rate of the discriminatory equation and values based on quantification theory exceed 85%. Quantification theory is a reliable method in rocky surrounding rock sub-classification during construction.