【摘要】 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。更多还原

【Abstract】 The integrality of rock mass is assessed based on the geometrical character and cementing status of structural plane,in which the structural plane statistic method and cementing status recognition method are used together.The geometrical character of structural plane is assessed according to volumetric joint count,and the geometrical integrity index of rock mass(Ig) is introduced to represent it.The cementing status of structural plane is classified into five grades based on joint opening and cemented fills.The qualitative character of each grade is given;and the cementing status coefficient of structural plane(Ip) is introduced to represent it.Then the integrality index of rock mass(Irm) is defined as Irm=Ig×Ip.The integrality of rock mass is classified into five grades:integrated,moderate integrated,cracked,moderate cracked,and highly cracked.The qualitative character and Irm of each grade are given.Taken a highway tunnel for example,the integrality of surrounding rock mass of tunnel is assessed by the sound wave test method,the volumetric joint count method and the method suggested in this article respectively;then the assessment results are compared as well.It is found that Irm obtained with the method suggested in this article coincides with Kv gained by sound wave test method,while the results of volumetric joint count method are commonly higher than the sound wave test method.更多还原