路基改良基桩低应变完整性分析及波形规律
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摘要
低应变反射波法作为基桩检测的一种有效手段,广泛用来评价桩身完整性.本文主要从低应变法的理论出发,结合工程实践分析总结了基桩缺陷的波形曲线表现规律,包括一维弹性杆件的应力波波动理论、低应变反射波法存在的一些问题和局限及实测海南西环铁路改良基桩的检测波形分析和桩身缺陷的波形规律总结等.为了有效地利用分析总结的波形规律并考虑桩-土体系的影响,进而提出对于相同类型桩的缺陷在不同地质环境中波形曲线不同表现的规律,及建立充实波形缺陷判断数据库的展望.完善的数据库可用于辅助工程基桩检测实践和专业研究.
As a kind of effective means of testing pile,low strain reflected wave method is widely used to evaluating integrity of pile.This paper proceed from theory of low strain method,analyzing and summarizing laws of waveform of pile with defects based on engineering practice.Main contents including one-dimensional wave theory,some existed problems and limitations,analysis of tested waveform at western fast railway project in Hainan and summarizing waveform's law of pile with defects etc.In order to availably utilize laws of waveform which have been summarized and consider the system of pile-soil at the same time,the paper proposes outlook about laws of waveform curve corresponding to the same type of pile with defect in diffrent geological environment,enriches database of waveform used to judging defects.Completed database can be used for testing project and relevant studies.
As a kind of effective means of testing pile,low strain reflected wave method is widely used to evaluating integrity of pile.This paper proceed from theory of low strain method,analyzing and summarizing laws of waveform of pile with defects based on engineering practice.Main contents including one-dimensional wave theory,some existed problems and limitations,analysis of tested waveform at western fast railway project in Hainan and summarizing waveform's law of pile with defects etc.In order to availably utilize laws of waveform which have been summarized and consider the system of pile-soil at the same time,the paper proposes outlook about laws of waveform curve corresponding to the same type of pile with defect in diffrent geological environment,enriches database of waveform used to judging defects.Completed database can be used for testing project and relevant studies.
引文
[1]GOBLE G G,MOSES F,RAUSCHE F.et al.Dynamic studiesonthe bearing capacity of piles,phase I II,report No,48,division of solid mechanics,structureand mechanical design[R].Case Wesern Reserve University,1970.
[2]GOBLE G G.Bearing capacity of pile from dynamic measure,final report.Ohio department of transportation,department of solid meehannies.Structures and mechanical design[R].Case Western Reserve University:1975.
[3]陈凡,徐天平,陈久照,等.基桩质量检测技术[M].北京:中国建筑工业出版社,2008.
[4]程瑞新.低应变反射波法基桩检测的理论研究与应用[D].长沙:中南大学,2009.
[5]张献民,蔡靖,王建华.基桩缺陷量化低应变动测研究[J].岩土工程学报,2003,25(1):47-50.
[6]张季超,吴义章,许勇,等.基础工程测试技术与案例分析[M].北京:科学出版社,2012.
[7]王雪峰,吴世明.基桩动测技术[M].北京:科学出版社,2001.
[8]RAUCHE F,MOSES F,GOBLE G G.Soil resistance prediction from pile dynamic[J].Soil Mech Found Div,1972,98(9):917-937.
[9]RAUSHE F,GOBLE G G.Determination of pile damage by top measurements[J].American Society for Testing and Materials,1979:500-600.
[10]NIYAMA S,MARTINS J A,MEDEIOUS J C,et al.Dynamic pile instrumentation in a calcareous sand close to PCR-2platform[C].Brazil.Second International Conference of the Application of Stress-Wave Theory on pile:Stockholm.Sweden.1984:306-312.
[11]RAUSCHE F,GOBLE G G,LIKINS G E.Dynamic determination of pile capacity[J].ASCE Journal of Geotechnical Enginering,1985,111(3):367-383.
[12]LIKINS G E,HUSSEIN M H,RAUSCHE.Design and testing of pile foundations[C].Third International Conference on the Application of Stress-Wave Theory to Piles,1998:644-658.
[13]贺占海.低应变反射波法桩身完整性检测的理论与实践[D].天津:河北工业大学,2002.
[14]MILITANO G,RAJAPAKSE R K N D.Dynamic response of a pile in a multi-layered soil to transient torsional ang axial loading[J].Geotechnique,1999(1):91-109.
[15]蔡靖,张献民,王建华.基桩完整性检测中桩土相互作用参数的试验研究[J].岩土工程学报,2006,28(5):617-621.
[16]林时坚,高亚成,王式.反射波法测桩的波形分析[J].河海大学学报,1995(4):42-49.
[17]周晓季.施工工艺及地质条件在基桩低应变反射波波形分析中的应用[J].探矿工程(岩土钻掘工程),2006(4):26-28.
[18]张海峰,赵权新.基桩反射波法传感器的选择[J].土工基础,2005(4):79-82.
[19]张海峰,唐立宪.反射波法低应变桩基检测过程浅析[J].岩土工程学报,1998(1):90-92.
[20]林建生,桩基检测中反射波法频率曲线的分析与研究[J].华南地震,1997,17(3):73-80.
[2]GOBLE G G.Bearing capacity of pile from dynamic measure,final report.Ohio department of transportation,department of solid meehannies.Structures and mechanical design[R].Case Western Reserve University:1975.
[3]陈凡,徐天平,陈久照,等.基桩质量检测技术[M].北京:中国建筑工业出版社,2008.
[4]程瑞新.低应变反射波法基桩检测的理论研究与应用[D].长沙:中南大学,2009.
[5]张献民,蔡靖,王建华.基桩缺陷量化低应变动测研究[J].岩土工程学报,2003,25(1):47-50.
[6]张季超,吴义章,许勇,等.基础工程测试技术与案例分析[M].北京:科学出版社,2012.
[7]王雪峰,吴世明.基桩动测技术[M].北京:科学出版社,2001.
[8]RAUCHE F,MOSES F,GOBLE G G.Soil resistance prediction from pile dynamic[J].Soil Mech Found Div,1972,98(9):917-937.
[9]RAUSHE F,GOBLE G G.Determination of pile damage by top measurements[J].American Society for Testing and Materials,1979:500-600.
[10]NIYAMA S,MARTINS J A,MEDEIOUS J C,et al.Dynamic pile instrumentation in a calcareous sand close to PCR-2platform[C].Brazil.Second International Conference of the Application of Stress-Wave Theory on pile:Stockholm.Sweden.1984:306-312.
[11]RAUSCHE F,GOBLE G G,LIKINS G E.Dynamic determination of pile capacity[J].ASCE Journal of Geotechnical Enginering,1985,111(3):367-383.
[12]LIKINS G E,HUSSEIN M H,RAUSCHE.Design and testing of pile foundations[C].Third International Conference on the Application of Stress-Wave Theory to Piles,1998:644-658.
[13]贺占海.低应变反射波法桩身完整性检测的理论与实践[D].天津:河北工业大学,2002.
[14]MILITANO G,RAJAPAKSE R K N D.Dynamic response of a pile in a multi-layered soil to transient torsional ang axial loading[J].Geotechnique,1999(1):91-109.
[15]蔡靖,张献民,王建华.基桩完整性检测中桩土相互作用参数的试验研究[J].岩土工程学报,2006,28(5):617-621.
[16]林时坚,高亚成,王式.反射波法测桩的波形分析[J].河海大学学报,1995(4):42-49.
[17]周晓季.施工工艺及地质条件在基桩低应变反射波波形分析中的应用[J].探矿工程(岩土钻掘工程),2006(4):26-28.
[18]张海峰,赵权新.基桩反射波法传感器的选择[J].土工基础,2005(4):79-82.
[19]张海峰,唐立宪.反射波法低应变桩基检测过程浅析[J].岩土工程学报,1998(1):90-92.
[20]林建生,桩基检测中反射波法频率曲线的分析与研究[J].华南地震,1997,17(3):73-80.
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