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采用结构面统计与结构面结合特征识别相结合的方法,从结构面几何发育特征和结合特征两方面评价工程岩体完整性。用体积节理数评价结构面几何发育特征,并引入岩体几何完整性系数Ig来表征。根据结构面张开度和充填胶结特征将其结合程度分为5级,给出各级的定性特征描述,并引入结构面结合程度系数Ip对其量化。进而定义了岩体完整性指数将岩体完整性划分为完整、较完整、破碎、较破碎和极破碎5级,并给出对应的定性特征描述和Irm值区间。结合公路隧道工程实例,分别采用文中方法、声波测试法和体积节理数测量法对隧道围岩完整性进行了评价并对评价结果进行了比较。结果表明,文中方法得到的岩体完整性指数Irm与声波测试法得到的Kv基本一致,而体积节理数量测法的评价结果整体上大于声波测试方法。
The combination of structural plane statistics and structure plane feature recognition is used to evaluate the integrity of the rock mass based on the geometric developmental features and the combination features of the structural plane. The geometrical developmental features of structural plane are evaluated by the volume of joints and the geometrical integrity coefficient Ig of the pluton is introduced. According to the open degree of structure plane and the characteristics of filling and cementation, the degree of combination is divided into five levels, and the qualitative characterization of each level is given, and the degree of combination of structural plane Ip is introduced to quantify it. Furthermore, the rock integrity index is defined to divide the integrity of the rock into complete, complete, fragmented, crushed and extremely crushed five levels, and the corresponding qualitative characterization and Irm interval are given. Combined with the examples of highway tunnel engineering, the integrity of tunnel surrounding rock is evaluated and the evaluation results are compared respectively by using the method in the paper, the acoustic wave test method and the volume section number measurement method. The results show that the rock mass integrity index Irm obtained by the method in this paper is basically the same as the Kv obtained by the acoustic testing method, while the evaluation result of the volumetric joint quantitative method is larger than the acoustic testing method as a whole.