摘要
基于回转钻探和静力触探试验的综合优势,开发并进行系统地旋进式触探试验,在室内试验和理论推导的基础上进一步验证。从旋进式触探机制入手,根据切削、静压及钻压作用过程建立旋进式触探试验参数钻压、扭矩与每转进给量之间的关系曲线,结合室内试验成果进而以曲线斜率和钻削理论为依托推导出岩石的抗压强度、弹性模量、内摩擦角及黏聚力的计算公式。以粉煤灰砌块旋进式触探试验成果为例,按上述方法计算试样4大基本力学参数,与试验实测值进行验证。结果表明计算值与室内实测的基本力学参数值比较接近,论证了该方法的可行性和后续研究的可期待性。
A system of rotary penetration was developed combining the advantage of rotary drilling and static penetration with verifications from laboratory tests and theoretical study. According to the mechanism of rotary penetration,the relationships between the drilling pressure,the torque and the feed per rotation in the processes of cutting,the direct pressing and the bit pressing have been found. The formulae for the compressive strength,the elastic modulus, the internal friction angle and the cohesion of rock were derived on the basis of laboratory test results. The method was applied to the fly ash blocks and the measured results were in good agreement with the calculated ones,which indicated the feasibility of the proposed method.
引文
[1]袁聚云,徐超,赵春风,等.土工试验与原位测试[M].上海:同济大学出版社,2004:220–266.(YUAN Juyun,XU Chao,ZHAO Chunfeng,et al.The soil test and in-situ test[M].Shanghai:Tongji University Press,2004:220–266.(in Chinese))
[2]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.(TAN Zhuoying,WANG Sijing,CAI Meifeng.Study on discriminant classification method for ground formation in identification of geotechnical engineering interfaces[J].Chinese Journal of Rock Mechanics and Engineering,2008,27(2):316–322.(in Chinese))
[3]高伟,岳中琦,李爱国.全自动钻孔过程监测技术在工程勘察中的应用探讨[J].工程勘察,2012,40(2):27–32.(GAO Wei,YUE Zhongqi,LI Aiguo.Discussion on the application of automatic drilling process monitoring in site investigation[J].Geotechnical Investigation and Surveying,2012,40(2):27–32.(in Chinese))
[4]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.The development of CPT and its application in geotechnical engineering[J].Journal of Hefei University of Technology:Natural Science,2008,31(2):211–215.(in Chinese))
[5]中华人民共和国国家标准编写组.GB50021—2001岩土工程勘察规范[S].北京:中国建筑工业出版社,2001.(The National Standards Compilation Group of People?s Republic of China.GB50021—2001Geotechnical investigation specification[S].Beijing:China Architecture and Building Press,2001.(in Chinese))
[6]李永乐.岩土工程勘察[M].郑州:黄河水利出版社,2004:157–169.(LI Yongle.Geotechnical engineering exploration[M].Zhengzhou:Yellow River Conservancy Press,2004:157–169.(in Chinese))
[7]李宁,宋玲,刘奉银.围岩力学参数现场测试系统[P].中国:200810236566.9,2008.(LI Ning,SONG Ling,LIU Fengyin.Testing system in site on mechanics parameters of wall rock[P].China:200810236566.9,2008.(in Chinese))
[8]毛玉坤.旋转触探的阻力影响因素研究与仪器研制[硕士学位论文][D].西安:西安理工大学,2007.(MAO Yukun.The resistance impact factors research and instrument development of gyration penetration[M.S.Thesis][D].Xi?an:Xi?an University of Technology,2007.(in Chinese))
[9]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,2007,3(1):40–44.(MAO Yukun,LIU Fengyin,LI Ning,et al.CPT theory analysis and a new idea for improving penetration capability[J].Northwestern Seismological Journal,2007,3(1):40–44.(in Chinese))
[10]罗士梅.新型旋转触探仪在坚硬黄土中应用的试验研究[硕士学位论文][D].西安:西安理工大学,2008.(LUO Shimei.Laboratory test of the application of new rotary penetration apparatus in stiff loess[M.S.Thesis][D].Xi?an:Xi?an University of Technology,2008.(in Chinese))
[11]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,LIU Fengyin.Research on the mechanics of rotary penetration test[J].Chinese Journal of Rock Mechanics and Engineering,2010,29(Supp.2):3 519–3 525.(in Chinese))
[12]郭恒,曹俭,艾池,等.PDC钻头切削深度与切削力之间关系的试验研究[J].大庆石油学院学报,1997,21(2):23–25.(GUO Heng,CAO Jian,AI Chi,et al.Study of the relationship between PDC drilling bit’s cutting depth and cutting load[J].Journal of Daqing Petroleum Institute,1997,21(2):23–25.(in Chinese))
[13]卢士红,胡湘烔,陈庭根.刮刀钻头钻速规律的初步研究[J].华东石油学院学报,1984,6(1):65–72.(LU Shihong,HU Xiangjiong,CHEN Tinggen.Preliminary study of drilling rate law for drag bit[J].Journal of China University of Petroleum,1984,6(1):65–72.(in Chinese))
[14]何鹏,刘长武,王琛,等.沉积岩单轴抗压强度与弹性模量关系研究[J].四川大学学报:工程科学版,2011,43(4):7–13.(HE Peng,LIU Changwu,WANG Chen,et al.Correlation analysis of uniaxial compressive strength and elastic modulus of sedimentary rocks[J].Journal of Sichuan University:Engineering Science,2011,43(4):7–13.(in Chinese))