欢迎您！东篱公司
退出
-
申报数据库
-
立项数据库
-
成果数据库
-
项目获奖数据库
中文摘要：
地下深部工程岩体具有典型的高地应力、高温、高地下水压场特性,地下水、岩石流变、地温和地应力的存在会造成岩体质量下降,因而在对深部工程岩体质量进行评价时,需要根据其特性对传统的浅部岩体质量评价方法即岩体等级（RMR）系统进行修正。通过引入岩体的水弱化修正系数Rw、热弱化修正系数Rθ和岩石流变弱化修正系数Rt对岩石的单轴抗压强度σc进行修正,同时增加地应力修正项P7,并对分类指标P1,P2,P3和P7进行连续性修正,获得符合深部岩体工程围岩质量评价实际状况的修正RMR系统。研究结果表明：随着岩石含水率、温度、荷载历时和地应力的增加,采用修正的RMR系统得到的岩体质量评分值比传统的RMR系统岩体质量评分值低,岩体质量等级略下降,所得结果与深部地下工程岩体状况更吻合。
英文摘要：
Underground deep engineering rock mass has three distinct properties： high in-situ stress,high rock temperature and high groundwater pressure.Its quality can decline with the existence of groundwater,rock rheology,rock temperature and in-situ stress.So rock mass rating（RMR） system,a traditional low depth rock mass quality evaluation method need to be revised when it is used for evaluating underground deep engineering rock mass quality.A revised RMR system was gotten after revising rock uniaxial compressive strength combining the groundwater,rock temperature and rock rheology weakening coefficients defined by considering the effect of the high groundwater pressure,high rock temperature and rock rheology on underground deep engineering rock mass properties,adding in-situ stress revision and modifying the marking standards of 4 indexes including rock uniaxial compressive strength,rock quality designation,joint space and in-situ stress by the continuity nonlinear fitting method.The results show that RMR of this revised method is lower and less than the traditional RMR system with the increment of rock’ water content,temperature,load time and in-situ stress.Its result is in better agreement with the situation of underground deep engineering rock mass.
同期刊论文项目
同项目期刊论文
期刊信息
位置：