ImageVerifierCode 换一换
格式:PDF , 页数:9 ,大小:305.20KB ,
资源ID:176715      下载积分:10 积分
快捷下载
登录下载
邮箱/手机:
温馨提示:
快捷下载时,用户名和密码都是您填写的邮箱或者手机号,方便查询和重复下载(系统自动生成)。 如填写123,账号就是123,密码也是123。
特别说明:
请自助下载,系统不会自动发送文件的哦; 如果您已付费,想二次下载,请登录后访问:我的下载记录
支付方式: 支付宝扫码支付 微信扫码支付   
验证码:   换一换

加入VIP,免费下载
 

温馨提示:由于个人手机设置不同,如果发现不能下载,请复制以下地址【https://www.wnwk.com/docdown/176715.html】到电脑端继续下载(重复下载不扣费)。

已注册用户请登录:
账号:
密码:
验证码:   换一换
  忘记密码?
三方登录: QQ登录  

下载须知

1: 本站所有资源如无特殊说明,都需要本地电脑安装OFFICE2007和PDF阅读器。
2: 试题试卷类文档,如果标题没有明确说明有答案则都视为没有答案,请知晓。
3: 文件的所有权益归上传用户所有。
4. 未经权益所有人同意不得将文件中的内容挪作商业或盈利用途。
5. 本站仅提供交流平台,并不能对任何下载内容负责。
6. 下载文件中如有侵权或不适当内容,请与我们联系,我们立即纠正。
7. 本站不保证下载资源的准确性、安全性和完整性, 同时也不承担用户因使用这些下载资源对自己和他人造成任何形式的伤害或损失。

版权提示 | 免责声明

本文(ASTM_D_4554_-_12.pdf)为本站会员(益****师)主动上传,蜗牛文库仅提供信息存储空间,仅对用户上传内容的表现方式做保护处理,对上载内容本身不做任何修改或编辑。 若此文所含内容侵犯了您的版权或隐私,请立即通知蜗牛文库(发送邮件至admin@wnwk.com或直接QQ联系客服),我们立即给予删除!

ASTM_D_4554_-_12.pdf

1、Designation:D455412Standard Test Method forIn Situ Determination of Direct Shear Strength of RockDiscontinuities1This standard is issued under the fixed designation D4554;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of la

2、st revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope*1.1 This test method covers the measurement of peak andresidual direct shear strength in a drained condition of in siturock disc

3、ontinuities as a function of stress normal to thesheared plane.This sheared plane is usually a significantdiscontinuity that may or may not be filled with gouge orsoil-like material.1.2 The measured shear properties are affected by scalefactors.The severity of the effect of these factors must beasse

4、ssed and applied to the specific problems on an individualbasis.1.3 The values stated in SI units are to be regarded as thestandard.No other units of measurements are included in thisstandard.1.4 All observed and calculated values shall conform to theguidelines for significant digits and rounding es

5、tablished inPractice D6026.1.5 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prio

6、r to use.2.Referenced Documents2.1 ASTM Standards:2D422 Test Method for Particle-Size Analysis of SoilsD653 Terminology Relating to Soil,Rock,and ContainedFluidsD2216 Test Methods for Laboratory Determination of Water(Moisture)Content of Soil and Rock by MassD3740 Practice for Minimum Requirements f

7、or AgenciesEngaged in Testing and/or Inspection of Soil and Rock asUsed in Engineering Design and ConstructionD4318 Test Methods for Liquid Limit,Plastic Limit,andPlasticity Index of SoilsD6026 Practice for Using Significant Digits in GeotechnicalDataD6913 Test Methods for Particle-Size Distribution

8、(Grada-tion)of Soils Using Sieve Analysis3.Terminology3.1 Definitions:3.1.1 For definitions of terms used in this test method referto Terminology D653.3.2 Definitions of Terms Specific to This Standard:3.2.1 discontinuitiesany surface across which some prop-erty of the rock mass is not continuous.Di

9、scontinuities includejoints,schistosity,faults,bedding planes,cleavage,and zonesof weakness,along with any filling material.3.2.2 peak shear strengththe maximum shear stress in thecomplete curve of stress versus displacement obtained for aspecified constant normal stress.3.2.3 residual shear strengt

10、hthe shear stress at whichnominally no further rise or fall in shear strength is observedwith increasing shear displacement and constant normal stressas shown in Fig.1.A true residual strength may only bereached after considerably greater shear displacement than canbe achieved in testing.The test va

11、lue should be regarded asapproximate and should be assessed in relation to the completeshear stress displacement curve.3.2.4 shear strength parameter,capparent cohesion;theprojected intercept on the shear stress axis of the plot of shearstress versus normal stress as shown in Fig.2.3.2.5 shear stren

12、gth parameter,friction angle;the angleof the tangent to the failure curve at a normal stress that isrelevant to design as shown in Fig.2.3.2.5.1 DiscussionDifferent values of c and relate todifferent stages of a test,for example,c,cr,a,and b,of Fig.2.4.Summary of Test Method4.1 This test method is p

13、erformed on rectangular-shapedblocks of rock that are isolated on all surfaces,except for theshear plane surface.1This test method is under the jurisdiction ofASTM Committee D18 on Soil andRock and is the direct responsibility of Subcommittee D18.12 on Rock Mechanics.Current edition approved Aug.1,2

14、012.Published November 2012.Originallyapproved in 1985.Last previous edition approved in 2006 as D4554 02(2006).DOI:10.1520/D4554-12.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume informati

15、on,refer to the standards Document Summary page onthe ASTM website.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 4.2 The blocks are not to be disturbed during preparationo

16、perations.The base of the block coincides with the plane to besheared.4.3 A normal load is applied perpendicular to the shearplane and then a side load is applied to induce shear along theplane and discontinuity.A typical equipment configuration isshown in Fig.3.5.Significance and Use5.1 Because of scale effects,there is no simple method ofpredicting the in situ shear strength of a rock discontinuityfrom the results of laboratory tests on small specimens;in situtests on large specimens are the m

copyright@ 2008-2023 wnwk.com网站版权所有

经营许可证编号:浙ICP备2024059924号-2