【摘要】 挪威岩土所Barton等人给出的岩质评定系数Q值计算式,从岩体的完整性、结构面发育程度、地下水和地应力的影响等方面,全面地反映了岩体的工程地质状况和水文地质状况,定量地反映了围岩质量的好坏,但对宏观地质构造及地形地貌的影响考虑相对较少。文章通过理论分析和数值计算,提出了三个修正系数,即褶皱影响系数Kfo、断层影响系数Kfa以及地形影响系数Ktf,并针对具体工程给出了相应的取值范围,对Q值进行了修正,反应了工程地质构造、地形地貌对Q值的影响程度,使其表达更为准确。更多还原

【Abstract】 The rock assessment system of Q and the Q formula proposed by Barton et al.represent the engineering geological and hydrogeological conditions of surrounding rocks in terms of rock integrity,development of a structural plane,and groundwater and crustal stress.One shortcoming of the system,however,is its lack of consideration regarding the effects of macroscopic geologic structures and topographic features.Based on theoretical analysis and numerical simulation,this paper puts forward three correction factors,i.e.the fold coefficient Kfo,fault coefficient Kfa and topographical coefficient Ktf,and gives a specific range of values to correct the Q value in regards to a concrete project,which reflects the effects of engineering geologic structures and topographic features on the Q value.更多还原