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为了准确地对苏州阳山岩体质量进行评价,采用了BQ、Q、RMR、GSI四种岩体质量评价方法,且分级结果基本一致,评价结果可以用于岩体工程稳定性评价。并对BQ、Q、RMR的两两相关性进行了分析,结果显示BQ与RMR呈线性关系,BQ与Q,RMR与Q呈对数关系。采用Hoek-Brown法对阳山岩体物理力学参数进行了计算,结果显示岩体强度较低,与岩体质量评价结果一致。最后以阳山凝灰岩为例,对岩体结构面强度进行了估算并分析了结构面条件对岩体强度的影响,结果显示结构面法向应力及节理连通率对结构面强度的影响较大且有相互制约的现象。分析结论可以为岩体工程的稳定性评价提供参考。
In order to evaluate the quality of rock masses in Yangshan, Suzhou, the quality evaluation methods of BQ, Q, RMR and GSI are used, and the grading results are basically the same. The evaluation results can be used to evaluate the stability of rock mass engineering. The correlation between BQ, Q and RMR was analyzed. The results showed that there was a linear relationship between BQ and RMR, and logarithmic relationship between BQ and Q, RMR and Q. The Hoek-Brown method was used to calculate the physical and mechanical parameters of Yangshan rock mass. The results show that the rock mass strength is low, consistent with the rock quality evaluation. Finally, taking the Yangshan tuff as an example, the strength of the rock mass is estimated and the effect of the structure surface condition on the rock mass strength is analyzed. The results show that the normal stress of the structure surface and the joint rate of the joint have a great influence on the strength of the structure surface There are mutual restraints. The conclusion of the analysis can provide a reference for the stability evaluation of rock mass engineering.