南京地铁工程勘察中声波测试与分析
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摘要
通过将声波测井及岩芯波速测量等方法运用于南京地铁工程勘察中,利用声波测井结果与岩芯物性参数对比,进行多参数综合分析,为岩体风化程度与岩体强度变化分析提供了有效的参数。原位声波波速测量,给出了岩体波速随深度的分布特征;通过原位测井波速与室内岩芯波速的对比测量,分析了不同强度岩石在不同测量条件下的差异;对原位测井波形特征的振幅变化、衰减特性分析,可进一步了解岩体的结构性质,从而证明声波测井是工程地质勘察中一种快速、经济、有效的岩体原位测试方法。
Acoustic logging and wave velocity measurement of borehole cores are applied to get some important information about rock characteristics in Nanjing subway engineering investigation. Based on the comparison of physical properties between acoustic logging and borehole cores,using the synthetical analysis of multi- parameter,much efficient information about rock weathering and strength is achieved. Using rock acoustic wave velocity of in-situ measurement,the distributing characteristic of the wave velocity of rocks in different depths are presented. Compared with the velocity measurement of well-logging and borehole cores,the disparities of rocks with different strengths on different measuring conditions,the amplitude variation,and attenuation characteristics of wave features of well-logging,are analyzed,and the structure properties of the rocks are discussed. It is proved that acoustic logging is a rapid,economic,and efficient method on in-situ measurement in geology engineering investigation.
Acoustic logging and wave velocity measurement of borehole cores are applied to get some important information about rock characteristics in Nanjing subway engineering investigation. Based on the comparison of physical properties between acoustic logging and borehole cores,using the synthetical analysis of multi- parameter,much efficient information about rock weathering and strength is achieved. Using rock acoustic wave velocity of in-situ measurement,the distributing characteristic of the wave velocity of rocks in different depths are presented. Compared with the velocity measurement of well-logging and borehole cores,the disparities of rocks with different strengths on different measuring conditions,the amplitude variation,and attenuation characteristics of wave features of well-logging,are analyzed,and the structure properties of the rocks are discussed. It is proved that acoustic logging is a rapid,economic,and efficient method on in-situ measurement in geology engineering investigation.
引文
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[2]赵明阶,吴德伦.工程岩体的超声波分类及强度预测[J].岩石力学与工程学报,2000,19(1):89–92.(ZhaoMingjie,WuDelun.The ultrasonic identification of rock mass classification and rock mass strength prediction[J].ChineseJournal ofRockMechanics andEngineering,2000,19(1):89–92.(inChinese))
[3]朱焕春.某高边坡岩体声波测试与分析[J].岩石力学与工程学报,1999,18(4):378–381.(ZhuHuanchun.Sonic wave measuring and analysis of high rock slope[J].ChineseJournal ofRockMechanics andEngineering,1999,18(4):378–381.(inChinese))
[4]席道瑛,黄理兴.岩芯声学特征与原位测井参数对比研究[J].岩土力学,1995,16(2):52–56.(XiDaoying,HuangLixing.Study on the acoustic characteristics of rock samples and parameters of in-situ measurement comparative[J].Rock andSoilMechanics,1995,16(2):52–56.(inChinese))
[5]王让甲.声波岩石分级和岩石动弹性力学参数的分析研究[M].北京:地质出版社,1997.(WangRangjia.Research onAcousticClassification andElasticParameters inRockMechanics[M].Beijing:GeologicalPublishingHouse,1997.(inChinese))
[6]陈仲候,王兴泰,杜世汉.工程与环境物探教程[M].北京:地质出版社,1993.89–99.(ChenZhonghou,WangXingtai,DuShihan.Textbook ofGeophysicalExploration inEngineering andEnvironment[M].Beijing:GeologicalPublishingHouse,1993.89–99.(inChinese))
[7]刘斌,王宝善,季卫国.围岩作用下岩石样品中微裂纹的闭合[J].地球物理学报,2001,44(3):421–428.(LiuBin,WangBaoshan,JiWeiguo.Closure of microcracks in rock samples under confining pressure[J].ChineseJournal ofGeophysics,2001,44(3):421– 428.(inChinese))
[8]BestA I,MechanC,SothcottJ.The relationships between the velocities,attenuations,and petrophysical properties of reservoir sedimentary rocks[J].Geophys.Prosp.,1994,42(1):151–178.
[9]刘斌,KernH,PoppT.不同围压下孔隙度不同的干燥及水饱和岩样中的纵横波速度及衰减[J].地球物理学报,1998,41(4):537–546.(LiuBin,KernH,PoppT.Velocities and attenuation of p- and s-waves in dry and wet rocks with different porosities under different confining pressures[J].ChineseJournal ofGeophysics,1998,41(4):537–546.(inChinese))
[10]岳兰秀,谢鸿森,周文戈.高温高压弹性波衰减的研究综述[J].地球科学进展,2001,16(3):382–386.(YueLanxiu,XieHongsen,ZhouWenge.Overview of seismic wave attenuation at high temperature and high pressure[J].Advance inEarthSciences,2001,16(3):382–386.(inChinese))
[11]王辉,常旭,刘伊克等.时间域相邻道地震波衰减成像研究[J].地球物理学报,2001,44(3):397–403.(WangHui,ChangXu,LiuYike,et al.Seismic neighboring traces attenuation tomography in time domain[J].ChineseJournal ofGeophysics,2001,44(3):397–403.(inChinese))
[12]刘彤,徐鸣洁,胡德昭等.风化花岗岩声谱特征分析[J].高校地质学报,2000,6(4):588–594.(LiuTong,XuMingjie,HuDezhao, et al.Study on acoustic spectral characteristics of weathered granite[J].GeologicalJournal ofChinaUniversities,2000,6(4):588–594.(inChinese))
[13]钟锴,徐鸣洁,王宏等.岩样中孔隙、裂缝声波特征的试验研究[J].石油试验地质,2002,24(2):164–167.(ZhongKai,XuMingjie,WangHong,et al.An experiment study on the acoustic characteristics of pores and fractures in rock samples[J].ExperimentalPetroleumGeology,2002,24(2):164– 167.(inChinese))
[14]中华人民共和国国家标准编写组.工程岩体试验方法标准(GB/T50266–99)[S].北京:中国计划出版社,1999.(TheNationalStandardCompilationGroup ofPeople′sRepublic ofChina.ExperimentalStandard ofRockMass inEngineering(GB/T50266– 99)[S].Beijing:ChinaPlanningPress,1999.(inChinese))
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