岩体完整性系数确定及应用中的几个问题探讨
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摘要
岩体完整性系数是一个与岩体质量和强度有关的地质参数,用于岩体完整程度划分、工程岩体质量分级等方面。然而不同的规范在岩体完整性系数的确定和应用等方面存在分歧。本文分析了岩体波速测试方法、岩体风化状态对岩体完整性系数的影响以及岩体体积节理数与岩体完整性系数的关系,并对岩体完整性系数应用中存在的问题进行了探讨。确定岩体完整性系数时,若岩块与岩体弹性波速的测试方法不同,应进行修正。所测试的岩块与岩体应处于相同的风化状态。采用岩体体积节理数确定岩体完整性系数时应考虑岩体中结构面的张开宽度和充填情况。应注意区分规范中围岩工程地质分类与岩爆判别中的围岩强度应力比的不同地质含义。
The integrity coefficient of rock mass presents general quality and strength of rock mass.It is an important input parameter in many analysis of rock mass behavior such as in rating of rock mass integrity and quality and rock mass classification.However,there are divergences in relevant codes on how to determinate and apply the integrity coefficient.This paper discusses the contributing factors on determination of integrity coefficient.It then suggests that the elastic wave velocity of intact rock and rock mass for calculation of integrity coefficient be measured in the similar weathered rocks with the same geophysical method.Otherwise,the measured value has to be corrected. The openness and filling conditions of discontinuities should be carefully considered when the integrity coefficient is estimated with the volumetric joint number.In rock mass classification and estimation of rock burst,the term ratio of rock mass strength to ground stress has different geological implications.The rock mass strength has relation with integrity coefficient of rock mass.
The integrity coefficient of rock mass presents general quality and strength of rock mass.It is an important input parameter in many analysis of rock mass behavior such as in rating of rock mass integrity and quality and rock mass classification.However,there are divergences in relevant codes on how to determinate and apply the integrity coefficient.This paper discusses the contributing factors on determination of integrity coefficient.It then suggests that the elastic wave velocity of intact rock and rock mass for calculation of integrity coefficient be measured in the similar weathered rocks with the same geophysical method.Otherwise,the measured value has to be corrected. The openness and filling conditions of discontinuities should be carefully considered when the integrity coefficient is estimated with the volumetric joint number.In rock mass classification and estimation of rock burst,the term ratio of rock mass strength to ground stress has different geological implications.The rock mass strength has relation with integrity coefficient of rock mass.
引文
[1]工程岩体分级标准(GB50218-94)[S].北京:中国计划出版社,1994.Standard for Engineering Classification of Rock Masses(GB50218-94).Beijing:China Planning Press,1994.
[2]水利水电工程地质勘察规范(GB50487-2008)[S].北京:中国计划出版社,2009.Code for Engineering Geological Investigation of Water Resourcesand Hydropower(GB50487-2008).Beijing:China PlanningPress,2009.
[3]邬爱清,柳赋铮.国标《工程岩体分级标准》的应用与进展[J].岩石力学与工程学报,2012,31(8):1513～1523.Wu Aiqing,Liu Fuzheng.Advancement and application of the“Standard of Engineering Classification of Rock Masses”.ChineseJournal of Rock Mechanics and Engineering,2012,31(8):1513～1523.
[4]尹红梅,张宜虎,周火明,钟作武.工程岩体分级研究综述[J].长江科学院院报,2011,28(8):59～66.Yin Hongmei,Zhang Yihu,Zhou Huoming,Zhong Zuowu.Re-view on the classification of engineering rock mass.Journal of Yan-gtze River Scientific Research Institute,2011,28(8):59～66.
[5]张勐,丁宝晶,崔建凯,贾留杰.西南某水电站坝基岩体质量分级研究[J].地质灾害与环境保护,2012,23(2):77～80.Zhang Meng,Ding Baojing,Cui Jiankai,Jia Liujie.Rock qualityrating for the dam foundation of a hydroelectric station in south-western China.Journal of Hazards and Environment Preservation,2012,23(2):77～80.
[6]于立宏.怒江马吉水电站坝基岩体质量分类[D].长春:吉林大学,2008.Yu Lihong.Rock Maass Quality Classification for Dam Foundtionof Maji Hydroelectric Power Station in Nujiang.Changchun:JilinUniversity,2008.
[7]王广德.复杂条件下围岩分类研究[D].成都:成都理工大学,2006.Wang Guangde.Research for the Surrounding Rock Mass Classifi-cation in the Complication Condition.Chengdu:Chengdu Univer-sity of Technology,2006.
[8]付海军.数字钻孔摄像技术原理及其在海底隧道含水构造注浆效果检验中的应用[D].济南:山东大学,2010.Fu Haijun.Study on Digital Borehole Camera Technique and It'sApplication on Grouting Effect Test in Subsea Tunnel.Ji'nan:Shandong University,2010.
[9]王昊,高志飞,赵国斌.利用Kv值进行岩体完整性划分的研究[J].水利水电工程设计,2009,28(4):48～49.Wang Hao,Gao Zhifei,Zhao Guobin.Study on rating of rockmass integrity by Kv value.Design of Water Resources&Hydroe-lectric,2009,28(4):48～49.
[10]水利水电工程物探规程(SL326-2005)[S].北京:中国水利水电出版社,2005.Code for Engineering Geophysical Exploration of Water Resourcesand Hydropower(SL326-2005).Beijing:China Water PowerPress,2005.
[11]王清玉.岩体完整性系数的确定问题[J].勘察科学技术,1994,(3):63～65.Wang Qingyu.Determination of rock mass integrity coefficient.Site investigation and technology,1994,(3):63～65.
[12]周喜德.岩体中弹性波速及其应用研究[J].贵州水力发电,1996,13(2):10～13.Zhou Xide.Study on velocity of elastic wave in rock and its ap-plication.Guizhou Water Power,1996,13(2):10～13.
[13]马超峰,李晓,成国文,蒲丛林.工程岩体完整性评价的实用方法研究[J].岩土力学,2010,31(11):3579～3584.Ma Chaofeng,Li Xiao,Cheng Guowen,Pu Conglin.Study ofpractical approach to assess integrality of engineering rock mass.Rock and Soil Mechanics,2010,31(11):3579～3584.
[14]林峰,黄润秋,王胜,刘明,霍俊杰,高正.岩体体积节理数(Jv)的现场测量方法评价[J].工程地质学报,2008,16(5):663～665.Lin Feng,Huang Runqiu,Wang Sheng,Liu Ming,Huo Junjie,Gao Zheng.Evaluation in-situ measurement methods for countingvolumetric joints of rock mass.Journal of Engineering Geology,2008,16(5):663～665.
[15]李攀峰,杨建宏,杨建,赵文光,聂德新.节理岩体体积节理数Jv的新计算公式[J].工程地质学报,2009,17(2):240～243.Li Panfeng,Yang Jianhong,Yang Jian,Zhao Wenguang,NieDexin.New formulate for volumetric joint count Jv of jointed rockmass.Journal of Engineering Geology,2009,17(2):240～243.
[16]李强.BP神经网络在工程岩体质量分级中的应用研究[J].西北地震学报,2002,24(3):220～224.Li Qiang.Study on the application of BP nervous network in clas-sification of rock mass quality.Northwestern Seismological Jour-nal,2002,24(3):220～224.
[2]水利水电工程地质勘察规范(GB50487-2008)[S].北京:中国计划出版社,2009.Code for Engineering Geological Investigation of Water Resourcesand Hydropower(GB50487-2008).Beijing:China PlanningPress,2009.
[3]邬爱清,柳赋铮.国标《工程岩体分级标准》的应用与进展[J].岩石力学与工程学报,2012,31(8):1513～1523.Wu Aiqing,Liu Fuzheng.Advancement and application of the“Standard of Engineering Classification of Rock Masses”.ChineseJournal of Rock Mechanics and Engineering,2012,31(8):1513～1523.
[4]尹红梅,张宜虎,周火明,钟作武.工程岩体分级研究综述[J].长江科学院院报,2011,28(8):59～66.Yin Hongmei,Zhang Yihu,Zhou Huoming,Zhong Zuowu.Re-view on the classification of engineering rock mass.Journal of Yan-gtze River Scientific Research Institute,2011,28(8):59～66.
[5]张勐,丁宝晶,崔建凯,贾留杰.西南某水电站坝基岩体质量分级研究[J].地质灾害与环境保护,2012,23(2):77～80.Zhang Meng,Ding Baojing,Cui Jiankai,Jia Liujie.Rock qualityrating for the dam foundation of a hydroelectric station in south-western China.Journal of Hazards and Environment Preservation,2012,23(2):77～80.
[6]于立宏.怒江马吉水电站坝基岩体质量分类[D].长春:吉林大学,2008.Yu Lihong.Rock Maass Quality Classification for Dam Foundtionof Maji Hydroelectric Power Station in Nujiang.Changchun:JilinUniversity,2008.
[7]王广德.复杂条件下围岩分类研究[D].成都:成都理工大学,2006.Wang Guangde.Research for the Surrounding Rock Mass Classifi-cation in the Complication Condition.Chengdu:Chengdu Univer-sity of Technology,2006.
[8]付海军.数字钻孔摄像技术原理及其在海底隧道含水构造注浆效果检验中的应用[D].济南:山东大学,2010.Fu Haijun.Study on Digital Borehole Camera Technique and It'sApplication on Grouting Effect Test in Subsea Tunnel.Ji'nan:Shandong University,2010.
[9]王昊,高志飞,赵国斌.利用Kv值进行岩体完整性划分的研究[J].水利水电工程设计,2009,28(4):48～49.Wang Hao,Gao Zhifei,Zhao Guobin.Study on rating of rockmass integrity by Kv value.Design of Water Resources&Hydroe-lectric,2009,28(4):48～49.
[10]水利水电工程物探规程(SL326-2005)[S].北京:中国水利水电出版社,2005.Code for Engineering Geophysical Exploration of Water Resourcesand Hydropower(SL326-2005).Beijing:China Water PowerPress,2005.
[11]王清玉.岩体完整性系数的确定问题[J].勘察科学技术,1994,(3):63～65.Wang Qingyu.Determination of rock mass integrity coefficient.Site investigation and technology,1994,(3):63～65.
[12]周喜德.岩体中弹性波速及其应用研究[J].贵州水力发电,1996,13(2):10～13.Zhou Xide.Study on velocity of elastic wave in rock and its ap-plication.Guizhou Water Power,1996,13(2):10～13.
[13]马超峰,李晓,成国文,蒲丛林.工程岩体完整性评价的实用方法研究[J].岩土力学,2010,31(11):3579～3584.Ma Chaofeng,Li Xiao,Cheng Guowen,Pu Conglin.Study ofpractical approach to assess integrality of engineering rock mass.Rock and Soil Mechanics,2010,31(11):3579～3584.
[14]林峰,黄润秋,王胜,刘明,霍俊杰,高正.岩体体积节理数(Jv)的现场测量方法评价[J].工程地质学报,2008,16(5):663～665.Lin Feng,Huang Runqiu,Wang Sheng,Liu Ming,Huo Junjie,Gao Zheng.Evaluation in-situ measurement methods for countingvolumetric joints of rock mass.Journal of Engineering Geology,2008,16(5):663～665.
[15]李攀峰,杨建宏,杨建,赵文光,聂德新.节理岩体体积节理数Jv的新计算公式[J].工程地质学报,2009,17(2):240～243.Li Panfeng,Yang Jianhong,Yang Jian,Zhao Wenguang,NieDexin.New formulate for volumetric joint count Jv of jointed rockmass.Journal of Engineering Geology,2009,17(2):240～243.
[16]李强.BP神经网络在工程岩体质量分级中的应用研究[J].西北地震学报,2002,24(3):220～224.Li Qiang.Study on the application of BP nervous network in clas-sification of rock mass quality.Northwestern Seismological Jour-nal,2002,24(3):220～224.
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