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ASTM D5878-2008 工程技术用岩石质量分级系统的使用标准指南

ASTM D5878-2008 工程技术用岩石质量分级系统的使用标准指南

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【英文标准名称】: Standard Guides for Using Rock-Mass Classification Systems for Engineering Purposes
【原文标准名称】: 工程技术用岩石质量分级系统的使用标准指南
【标准号】: ASTM D5878-2008
【标准状态】: 现行
【国别】: 美国
【发布日期】: 2008
【实施或试行日期】:
【发布单位】: 美国材料与试验协会(US-ASTM)
【起草单位】: D18.12
【标准类型】: (Guide)
【标准水平】: ()
【中文主题词】:
【英文主题词】: classification; classification system; coal mine roof rating (CMRR); Japanese rock mass classification systems; new Austrian tunneling method (NATM); Q-system (NGI); rock mass; rock mass rating system (RMR); rock material field classification syst
【摘要】: The classification systems included in this standard and their respective applications are as follows: Rock Mass Rating System (RMR) or Geomechanics Classification8212;This system has been applied to tunneling, hard-rock mining, coal mining, stability of rock slopes, rock foundations, borability, rippability, dredgability, weatherability, and rock bolting. Rock Structure Rating System (RSR)8212;This system has been used in tunnel support and excavation and in other ground support work in mining and construction. The Q System or Norwegian Geotechnical Institute System (NGI)8212;This system has been applied to work on tunnels and chambers, rippability, excavatability, hydraulic erodibility, and seismic stability of roof-rock. The Unified Rock Classification System (URCS)8212;This system has been applied to work on foundations, methods of excavation, slope stability, uses of earth materials, blasting characteristics of earth materials, and transmission of ground water. The Rock Material Field Classification System (RMFCS)8212;This system has been used mainly for applications involving shallow excavation, particularly with regard to hydraulic erodibility in earth spillways, excavatability, construction quality of rock, fluid transmission, and rock-mass stability (11). The New Austrian Tunneling Method (NATM)8212;This system is used for both conventional (cyclical, such as drill-and-blast) and continuous (tunnel-boring machine or TBM) tunneling. This is a tunneling procedure in which design is extended into the construction phase by continued monitoring of rock displacement. Support requirements are revised to achieve stability (6). Note 28212;The Austrian code (7) specifies methods of payment based on coding of excavation volume and means of support. The Coal Mine Roof Rating (CMRR)8212;This system applies to bedded coal-measure rocks, in particular with regard to their structural competence as influenced by discontinuities in the rock mass. The basic building blocks of CMRR are unit ratings. The units are rock intervals defined by their geotechnical properties, and are at least 0.15 m (6 in.) thick. The unit ratings are combined into roof ratings, using additional geotechnical characteristics (8). Japanese Rock Mass Classification Systems8212;The Japanese Society of Engineering Geology has recognized seven major classification systems in use in Japan (9). These are summarized in 4.1.8.1-4.1.8.7, without additional details in this guide. Rock-Mass Classification for Railway Tunnels by Railway Technical Research Institute8212;Rock-masses are classified based on the values of P-wave velocity, unconfined compressive strength and unit weight. Support patterns for tunnels, such as shotcreting and rock bolting, is recommended depending upon the rock-mass classification obtained. Rock-Mass Classification for Tunnels and Slopes by Japan Highway Public Corporation8212;This system classifies the rock-mass using RQD, P-wave velocity, unconfined compressive strength and unit weight. Rock-Mass Classification fo......

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