软岩的旋转触探参数与力学参数的内在关系研究
|
摘要
为实现软岩原位旋转触探,以达到连续、快速、准确地确定软岩力学参数的目的,必须清楚软岩的力学参数与触探时荷载参数的内在关系。以砌块、特级石膏A、特级石膏B和模具石膏试样来模拟单轴抗压强度不超过15 MPa的软岩,采用成孔直径相同的角片式探头及锥柄式标准麻花探头,在相同运行参数下,对这几种类型试样进行旋转触探及单轴抗压和抗剪试验,获得探头上的轴向压力和扭矩及试样的抗压强度、弹性模量和抗剪强度值。并根据探头上切刀对试样加载方式与试样的单轴抗压和抗剪试验中的加压板加载方式的相似性,从理论上建立触探时轴向压力、扭矩与试样的抗压强度、弹性模量、黏聚力及内摩擦角的数学模型,即2套参数间的内在理论关系:触探时试样局部处于体积破坏阶段时,轴向压力、扭矩和试样的抗压强度、黏聚力及内摩擦角有关,但与弹性模量无关,且轴向压力、扭矩随着抗压强度、黏聚力的增加而呈线性增加;而处于研磨阶段时,轴向压力、扭矩和试样弹性模量、黏聚力及内摩擦角有关,与抗压强度无关。
In order to carry out the in-situ rotary penetration test for determining the mechanical parameters of soft rock quickly and accurately,the intrinsic relationship between mechanical parameters of soft rock and load parameters of rotary penetration test should be known.The soft rock with uniaxial compression strength less than 15 MPa is simulated by the building block,gypsum A,gypsum B and mould gypsum samples.The uniaxial compressive test,shear test and rotary penetrometer test with two kinds of probes with the same diameter of pore-forming are carried out under the same experimental conditions.The axial force and torque of the probe,and the compression strength,Young's modulus and shear strength of the sample are obtained.In the light of the similarity between cutter's loading mode in rotary penetrometer test and plate's loading modes in uniaxial compressive test and shear test,the mathematical model of load parameters in rotary penetration test and mechanical parameters in uniaxial compressive test is established theoretically,which is the intrinsic relationship of the two kinds of parameters.When the sample is at the stage of local volume damage during penetration test,the axial force and torque are not only related to the compression strength,cohesion and internal friction angle,except Young's modulus,but also linearly increasing with the compression strength and cohesion.When the sample is at the stage of grinding damage,the axial force and torque are related to the Young's modulus,cohesion and internal friction angle except the compression strength.
In order to carry out the in-situ rotary penetration test for determining the mechanical parameters of soft rock quickly and accurately,the intrinsic relationship between mechanical parameters of soft rock and load parameters of rotary penetration test should be known.The soft rock with uniaxial compression strength less than 15 MPa is simulated by the building block,gypsum A,gypsum B and mould gypsum samples.The uniaxial compressive test,shear test and rotary penetrometer test with two kinds of probes with the same diameter of pore-forming are carried out under the same experimental conditions.The axial force and torque of the probe,and the compression strength,Young's modulus and shear strength of the sample are obtained.In the light of the similarity between cutter's loading mode in rotary penetrometer test and plate's loading modes in uniaxial compressive test and shear test,the mathematical model of load parameters in rotary penetration test and mechanical parameters in uniaxial compressive test is established theoretically,which is the intrinsic relationship of the two kinds of parameters.When the sample is at the stage of local volume damage during penetration test,the axial force and torque are not only related to the compression strength,cohesion and internal friction angle,except Young's modulus,but also linearly increasing with the compression strength and cohesion.When the sample is at the stage of grinding damage,the axial force and torque are related to the Young's modulus,cohesion and internal friction angle except the compression strength.
引文
[1]吴道祥,单灿灿,钟轩明,等.静力触探的发展及其在岩土工程中的应用[J].合肥工业大学学报:自然科学版,2008,31(2):211-215.(WU Daoxiang,SHAN Cancan,ZHONG Xuanming,et al.Development of CPT and its application in geotechnical engineering[J].Journal of Hefei University of Technology:Natural Sciences,2008,31(2):211-215.(in Chinese))
[2]中华人民共和国行业标准编写组.CECS04—88静力触探技术标准[S].北京:中国建筑工业出版社,1988.(The Professional StandardsCompilation Group of People′s Republic of China.CECS04—88Technical specification for electrical cone penetration test[S].Beijing:Chinese Architecture Industry Press,1988.(in Chinese))
[3]毛玉坤,刘奉银,李宁,等.CPT理论分析及提高触探能力的新思路[J].西北地震学报,2007,29(1):40-44.(MAO Yukun,LIUFengyin,LI Ning,et al.CPT theory analysis and a new idea forimproving penetration capability[J].Northwestern Seismological Journal,2007,29(1):40-44.(in Chinese))
[4]宋玲,李宁,刘奉银.旋进式触探机制研究[J].岩石力学与工程学报,2010,29(增2):3 519-3 525.(SONG Ling,LI Ning,LIUFengyin.Research on the mechanism of rotary penetration test[J].Chinese Journal of Rock Mechanics and Engineering,2010,29(Supp.2):3 519-3 525.(in Chinese))
[5]腾子军.用钻进参数仪实时判层[J].煤田地质与勘探,2000,28(2);58-60.(TENG Zijun.Real-time stratum-deciding using the drillingparameter instrument[J].Coal Geology and Exploration,2000,28(2):58-60.(in Chinese))
[6]SUGAWARA J,YUE Z Q,THAM L G,et al.weathered rock characterization using drilling parameters[J].Canadian GeotechnicalJournal,2003,40(3):661-668.
[7]YUE Z Q,LEE C F,LAW K T,et al.Automatic monitoring of rotary-percussive drilling for ground characterization—illustrated by acase example in Hong Kong[J].International Journal of Rock Mechanicsand Mining Sciences,2004,41(4):573-612.
[8]谭卓英,蔡美峰,岳中琦,等.钻进参数用于香港复杂风化花岗岩地层的界面识别[J].岩石力学与工程学报,2006,25(增1):2 939-2 945.(TAN Zhuoying,CAI Meifeng,YUE Zhongqi,et al.Interfaceidentification of intricate weathered granite ground investigation inHong Kong using drilling parameters[J].Chinese Journal of RockMechanics and Engineering,2006,25(Supp.1):2 939-2 945.(inChinese))
[9]谭卓英,岳中琦,蔡美峰.风化花岗岩地层旋转钻进中的能量分析[J].岩石力学与工程学报,2007,26(3):478-483.(TANZhuoying,YUE Zhongqi,CAI Meifeng.Analysis of energy for rotarydrilling in weathered granite formation[J].Chinese Journal of RockMechanics and Engineering,2007,26(3):478-483.(in Chinese))
[10]谭卓英,岳中琦,谭国焕,等.金刚石钻进比功及风化花岗岩实时分级研究[J].岩石力学与工程学报,2007,26(增1):2 907-2 912.(TAN Zhuoying,YUE Z Q,THAM L G,et al.Study on specificenergy of diamond drilling and real-time classification of weatheredgranite[J].Chinese Journal of Rock Mechanics and Engineering,2007,26(Supp.1):2 907-2 912.(in Chinese))
[11]谭卓英,王思敬,蔡美峰.岩土工程界面识别中的地层判别分类方法研究[J].岩石力学与工程学报,2008,27(2):316-322.(TANZhuoying,WANG Sijing,CAI Meifeng.Study on discriminantclassification method for ground formation in identification ofgeotechnical engineering interfaces[J].Chinese Journal of Rock Mechanicsand Engineering,2008,27(2):316-322.(in Chinese))
[12]藏传伟,黄宏伟,张子新.冲击钻钻速与隧道岩石力学参数的关系探讨[J].地下空间与工程学报,2008,4(3):415-419(ZANGChuanwei,HUANG Hongwei,ZHANG Zixin.Review on relationshipbetween drilling rate and rock mechanical parameters in a tunnel[J].Chinese Journal of Underground Space and Engineering,2008,4(3):415-419.(in Chinese))
[13]KARASAWA H,OHNO T,KOSUGI M,et al.Methods to estimate therock strength and tooth wear while drilling with roller-bits—part 1:milled-tooth bits[J].Journal of Energy Resources Technology,2002,124(3):125-132.
[14]KARASAWA H,OHNO T,KOSUGI M,et al.Methods to estimate therock strength and tooth wear while drilling with roller-bits—part 2:insert bits[J].Journal of Energy Resources Technology,2002,124(3):133-140.
[15]OHNO T,KARASAWA H,KOSUGI M,et al.Proposed practicalmethods to estimate rock strength and tooth wear while drilling withroller-cone bits[J].Journal of Energy Resources Technology,2004,126(4):302-310.
[16]李宁,宋玲,刘奉银.围岩力学参数现场测试系统:中国,200810236566.9[P].2008-12-31[2010-11-08].(LI Ning,SONG Ling,LIU Fengyin.Testing system in site on mechanical parameters of wallrock:China,200810236566.9[P].2008-12-31[2010-11-08].(in Chinese))
[17]宋玲,李宁,刘奉银.较硬地层中旋进触探技术应用可行性研究[J].岩土力学,2011,32(2):635-640(SONG Ling,LI Ning,LIU Fengyin.Research on applicable feasibility of rotary penetrationtechnique through laboratory experiment[J].Rock and Soil Mechanics,2011,32(2):635-640.(in Chinese))
[18]潘丽军,陈锦权.试验设计与数据处理[M].南京:东南大学出版社,2008:86-93.(PAN Lijun,CHEN Jinquan.Experimental designand data processing[M].Nanjing:Southeast University Press,2008:86-93.(in Chinese))
[2]中华人民共和国行业标准编写组.CECS04—88静力触探技术标准[S].北京:中国建筑工业出版社,1988.(The Professional StandardsCompilation Group of People′s Republic of China.CECS04—88Technical specification for electrical cone penetration test[S].Beijing:Chinese Architecture Industry Press,1988.(in Chinese))
[3]毛玉坤,刘奉银,李宁,等.CPT理论分析及提高触探能力的新思路[J].西北地震学报,2007,29(1):40-44.(MAO Yukun,LIUFengyin,LI Ning,et al.CPT theory analysis and a new idea forimproving penetration capability[J].Northwestern Seismological Journal,2007,29(1):40-44.(in Chinese))
[4]宋玲,李宁,刘奉银.旋进式触探机制研究[J].岩石力学与工程学报,2010,29(增2):3 519-3 525.(SONG Ling,LI Ning,LIUFengyin.Research on the mechanism of rotary penetration test[J].Chinese Journal of Rock Mechanics and Engineering,2010,29(Supp.2):3 519-3 525.(in Chinese))
[5]腾子军.用钻进参数仪实时判层[J].煤田地质与勘探,2000,28(2);58-60.(TENG Zijun.Real-time stratum-deciding using the drillingparameter instrument[J].Coal Geology and Exploration,2000,28(2):58-60.(in Chinese))
[6]SUGAWARA J,YUE Z Q,THAM L G,et al.weathered rock characterization using drilling parameters[J].Canadian GeotechnicalJournal,2003,40(3):661-668.
[7]YUE Z Q,LEE C F,LAW K T,et al.Automatic monitoring of rotary-percussive drilling for ground characterization—illustrated by acase example in Hong Kong[J].International Journal of Rock Mechanicsand Mining Sciences,2004,41(4):573-612.
[8]谭卓英,蔡美峰,岳中琦,等.钻进参数用于香港复杂风化花岗岩地层的界面识别[J].岩石力学与工程学报,2006,25(增1):2 939-2 945.(TAN Zhuoying,CAI Meifeng,YUE Zhongqi,et al.Interfaceidentification of intricate weathered granite ground investigation inHong Kong using drilling parameters[J].Chinese Journal of RockMechanics and Engineering,2006,25(Supp.1):2 939-2 945.(inChinese))
[9]谭卓英,岳中琦,蔡美峰.风化花岗岩地层旋转钻进中的能量分析[J].岩石力学与工程学报,2007,26(3):478-483.(TANZhuoying,YUE Zhongqi,CAI Meifeng.Analysis of energy for rotarydrilling in weathered granite formation[J].Chinese Journal of RockMechanics and Engineering,2007,26(3):478-483.(in Chinese))
[10]谭卓英,岳中琦,谭国焕,等.金刚石钻进比功及风化花岗岩实时分级研究[J].岩石力学与工程学报,2007,26(增1):2 907-2 912.(TAN Zhuoying,YUE Z Q,THAM L G,et al.Study on specificenergy of diamond drilling and real-time classification of weatheredgranite[J].Chinese Journal of Rock Mechanics and Engineering,2007,26(Supp.1):2 907-2 912.(in Chinese))
[11]谭卓英,王思敬,蔡美峰.岩土工程界面识别中的地层判别分类方法研究[J].岩石力学与工程学报,2008,27(2):316-322.(TANZhuoying,WANG Sijing,CAI Meifeng.Study on discriminantclassification method for ground formation in identification ofgeotechnical engineering interfaces[J].Chinese Journal of Rock Mechanicsand Engineering,2008,27(2):316-322.(in Chinese))
[12]藏传伟,黄宏伟,张子新.冲击钻钻速与隧道岩石力学参数的关系探讨[J].地下空间与工程学报,2008,4(3):415-419(ZANGChuanwei,HUANG Hongwei,ZHANG Zixin.Review on relationshipbetween drilling rate and rock mechanical parameters in a tunnel[J].Chinese Journal of Underground Space and Engineering,2008,4(3):415-419.(in Chinese))
[13]KARASAWA H,OHNO T,KOSUGI M,et al.Methods to estimate therock strength and tooth wear while drilling with roller-bits—part 1:milled-tooth bits[J].Journal of Energy Resources Technology,2002,124(3):125-132.
[14]KARASAWA H,OHNO T,KOSUGI M,et al.Methods to estimate therock strength and tooth wear while drilling with roller-bits—part 2:insert bits[J].Journal of Energy Resources Technology,2002,124(3):133-140.
[15]OHNO T,KARASAWA H,KOSUGI M,et al.Proposed practicalmethods to estimate rock strength and tooth wear while drilling withroller-cone bits[J].Journal of Energy Resources Technology,2004,126(4):302-310.
[16]李宁,宋玲,刘奉银.围岩力学参数现场测试系统:中国,200810236566.9[P].2008-12-31[2010-11-08].(LI Ning,SONG Ling,LIU Fengyin.Testing system in site on mechanical parameters of wallrock:China,200810236566.9[P].2008-12-31[2010-11-08].(in Chinese))
[17]宋玲,李宁,刘奉银.较硬地层中旋进触探技术应用可行性研究[J].岩土力学,2011,32(2):635-640(SONG Ling,LI Ning,LIU Fengyin.Research on applicable feasibility of rotary penetrationtechnique through laboratory experiment[J].Rock and Soil Mechanics,2011,32(2):635-640.(in Chinese))
[18]潘丽军,陈锦权.试验设计与数据处理[M].南京:东南大学出版社,2008:86-93.(PAN Lijun,CHEN Jinquan.Experimental designand data processing[M].Nanjing:Southeast University Press,2008:86-93.(in Chinese))
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心