RMR岩体分级技术在某隧道勘察中的应用  

Application of RMR rock mass classification in tunnel investigation

作　　者：岳永利[1,2] 吴臻林[1,2] 刘卫民[1,2] 

机构地区：[1]中交第一公路勘察设计研究院有限公司,西安710075 [2]西安中交公路岩土工程有限责任公司,西安710075

出　　处：《工程勘察》2016年第9期11-16,共6页Geotechnical Investigation & Surveying

摘　　要：RMR岩体分级技术是以现场工程地质调查结果为主要依据,结合现场钻探及实验室试验进行地下工程岩体分级的方法,其前提是有良好的地质露头或开挖揭示。阿尔及利亚南北高速公路希法(CHIFFA)峡谷段以隧道形式穿越,隧址区山高谷深、地形陡峻且植被茂密,人员设备均难以到达隧址,但其紧邻RN1国道,为一旁山型隧道,沿RN1国道基岩露头良好,且岩性总体单一,主要地质构造(层理、断裂)与隧道走向垂直。本次勘察主要以工程地质调查为主,钻孔S06-01虽然位于隧道左线外侧135m处,但其地层岩性、钻探取芯取样及揭示的地质构造有一定代表性,相关试验及测试应用于隧道围岩评价是可靠的。该项目具有一定代表性,可以为类似条件隧道勘察提供参考。RMR rock mass classification method is mainly based on field engineering geology survey,combined with drilling and laboratory testing results,which requires natural rock outcrops and artificial exposures. The Gorge CHIFFA section of Algeria North-South Highway is a tunnel. The site investigation equipments and stuff cannot reach the tunneling location because of high mountains,deep valleys,steep terrains and dense forest. The national road RN1 adjacent to the highway is a tunnel along mountain side.There are many rock outcrops along the road and there is only one rock type. The dominate geological structures including beddings,faults are vertical to the road tunnel. The site investigation is mainly depends on geological surveying. Borehole S06-01 is located 135 m away from the tunnel line, the lithology,cored samples and the geological structures explored are typical. The test result is reliable to assess the tunnel surrounding rocks. The project investigation practice could be referred by the similar tunnel investigation works.

关 键 词：RMR岩体分级 隧道 不连续结构面 力学参数 

分 类 号：U452.12[建筑科学—桥梁与隧道工程]