大视野背景扁平化商务课件

Rock Mass Classification,Urban Underground Space Engineering Hebei University of Engineering,南阳哪里有治疗白癜风的医院郑州华柱白癜风医院是河南省新农合定点医疗机构,【微信号zzhznpx】咨询QQ：851856908采用专利口服（2012102561459）专利外用（2012102561660）治疗白癜风，新农合报销【70%-30%】，地址：郑州市西大街一号(二七广场东行100米路北)。 南阳专业白癜风医院/ 南阳专业白癜风医院/ 南阳专业白癜风医院http:/0371/ 南阳专业白癜风医院/ 南阳专业白癜风医院/ 南阳专业白癜风医院/ 南阳专业白癜风医院/ 南阳专业白癜风医院/ 南阳专业白癜风医院/ 南阳专业白癜风医院/ 南阳专业白癜风医院/ 南阳专业白癜风医院/ 南阳最专业的白癜风医院http:/0371/ 南阳最专业的白癜风医院/ 南阳最专业的白癜风医院/ 南阳最专业的白癜风医院/ 南阳最专业的白癜风医院/ 南阳最专业的白癜风医院/ 南阳最专业的白癜风医院/ 南阳最专业的白癜风医院/ 南阳最专业的白癜风医院/,rockbolt,steel sets,civil engineering,RQD,heading / face,NATM,wire mesh,shot crete,parameter,stress field,span,spall,slab,rock brust,RMR,blast,bench, During the feasibility and preliminary design stages of a project, when very little detailed information on the rock mass and its stress and hydrologic characteristics is available, the use of a rock mass classification scheme can be of considerable benefit. At its simplest, this may involve using the classification scheme as a check-list to ensure that all relevant information has been considered. At the other end of the spectrum, one or more rock mass classification scheme can be used to build up a picture of the composition and characteristics of a rock mass to provide initial estimates of support requirements, and to provide estimates of strength and deformation properties of the rock mass., It is important to understand that the use of a rock mass classification scheme does not ( and can not ) replace some of the more elaborate design procedures. However， the use of these design procedures requires access to relatively detailed information on in situ stress， rock mass properties and planned excavation sequence， none of which may be available at an early stage in the project. As this information becomes available， the use of the rock mass classification schemes should be updated and used in conjunction with site specific analyses.,LETS GO,Part One,P88-89,Introductions 读 前 介 绍,Part Two,P89-90,太沙基 Karl Terzaghi 18831963,现代土力学奠基人 集教、研究、实践于一体 重视工程实践对土力学的发展 麻省理工 维也纳高等工业学院 伦敦帝国学院 哈佛大学 名誉博士学位9个 获ASCE最高奖诺曼奖4次 ( 唯一 ) 专设太沙基奖与太沙基讲座 ( 最顶尖 ),Intact Rock 完 整 岩,Stratified Rock 层 状 岩,Moderately Jointed Rock 中 度 节 理 岩,Blocky and Seamy Rock 块 状、有 裂 缝 岩,Crushed but Chemically Intact Rock 碎 片 岩（未 受 化 学 扰 动）,Squeezing Rock 挤 压 岩,Swelling Rock 膨 胀 岩,Part Three,P90,Part Four,P90-91,60+36+17+15 64,Palmstroms relationship for clay-free rock masses（ 不 含 粘 性 土 的 岩 体 ） RQD = 115 3.3Jv Jv for the sum of the number of joints per unit length for all joint,Deeres RQD When using diamond drill core, care must be taken to ensure that fractures caused by handing or the drilling process, are identified and ignored.,Palmstroms RQD For exposure mapping, blast induced fractures should not be included when estimating Jv.,Deeres RQD has been widely used, particularly in North America, for the past 25 years. Some attempted to relate RQD to Terzaghis rock load factors and to rock bolt requirements in tunnels. The Most