基桩声波透射法检测数据评判体系研究
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摘要
基桩声波透射法是目前最主要的一种基桩完整性无损检测方法,但该方法在工程应用中普遍存在桩身完整性等级判定时的主观性、随意性较大等问题。通过对基桩声波透射法波速、波幅及PSD(声时-深度曲线相邻两点的斜率与相邻时差值的乘积)判据进行分析比较,基于现场试验及计算研究,考虑两测管不平行等影响因素,提出了基桩声波透射法检测数据的综合评判方法。该方法不仅构建了有效的全新的综合评判体系,而且模型桩试验研究及工程实践表明:该评判方法可以有效地提高检测数据分析、处理的客观性和科学性,值得大力推广。
The collected data of integrity testing of pile by ultrasonic crosshole testing requires further calculation and analysis to find the defects along the pile length.For drilling piles,a new analysis method for the collected data based on the research work of test and calculation is proposed to reduce the subjective of tested results.The concept of "ultrasonic test line" is described;a new procedure which used to decide the critical velocity and the comprehensive system that constructed by the units of cross sections of pile is expounded.This method has been proved to be available and more impersonal and accepted by Technical code for testing of building foundation piles of Guangdong province in China.
The collected data of integrity testing of pile by ultrasonic crosshole testing requires further calculation and analysis to find the defects along the pile length.For drilling piles,a new analysis method for the collected data based on the research work of test and calculation is proposed to reduce the subjective of tested results.The concept of "ultrasonic test line" is described;a new procedure which used to decide the critical velocity and the comprehensive system that constructed by the units of cross sections of pile is expounded.This method has been proved to be available and more impersonal and accepted by Technical code for testing of building foundation piles of Guangdong province in China.
引文
[1]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,2003.
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[4]Pile Dynamics Inc.Case pile wave analysis program(CAPWAP),version2000-1,CAPWAP for Windows-Manual[R].Cleveland:Pile Dynamics Inc.,2000,
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[6]解家毕,刘祖德.施工工艺对灌注桩承载力的影响分析[J].哈尔滨工业大学学报,2005,37(10):1446-1450.XIE Jia-bi,LIU Zu-de.Analysis on the affecting factor of bearing resistance of filling pile[J].Journal of Harbin Institute of Technology,2005,37(10):1446-1450.
[7]周林辉.基桩超声波透射法在解释中的问题及处理方法[J].地质灾害与环境保护,2001,12(3):69-72.ZHOU Lin-hui.The problems and processing methods in interpretation of ultrasonic test for pile foundation[J].Journal of Geological Hazards and Environment Preservation,2001,12(3):69-72.
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[9]南金生,马建军.超声波CT成像技术在桩基检测中的应用[J].地震学刊,1999,(4):43-46.NAN Jin-sheng,MA Jian-jun.Application of supersonic wave CT image to pile fundament[J].Journal of Seismology,1999,(4):43-46.
[10]董清华.混凝土无损检测方法述评[J].五邑大学学报,2005,19(11):53-57.DONG Qing-hua.A review of nondestructive methods for testing concrete[J].Journal of Wuyi University,2005,19(11):53-57.
[2]中国建筑科学研究院.JGJ106-2003建筑基桩检测技术规范[S].北京:中国建筑工业出版社,2003.
[3]DENVER H.Test with an instrumented model pile[J].Application of Stress-Wave Theory on Piles,1984,22(9):21-27.
[4]Pile Dynamics Inc.Case pile wave analysis program(CAPWAP),version2000-1,CAPWAP for Windows-Manual[R].Cleveland:Pile Dynamics Inc.,2000,
[5]陈久照.动力试桩中冲击能量对桩身完整性检测的影响[J].岩土力学,2003,24(增刊):7-11.CHEN Jiu-zhao.Influence of impact energy on pile integrity test in dynamic test for piles[J].Rock and Soil Mechanics,2003,24(Supp.):7-11.
[6]解家毕,刘祖德.施工工艺对灌注桩承载力的影响分析[J].哈尔滨工业大学学报,2005,37(10):1446-1450.XIE Jia-bi,LIU Zu-de.Analysis on the affecting factor of bearing resistance of filling pile[J].Journal of Harbin Institute of Technology,2005,37(10):1446-1450.
[7]周林辉.基桩超声波透射法在解释中的问题及处理方法[J].地质灾害与环境保护,2001,12(3):69-72.ZHOU Lin-hui.The problems and processing methods in interpretation of ultrasonic test for pile foundation[J].Journal of Geological Hazards and Environment Preservation,2001,12(3):69-72.
[8]钟会生,郭大兵.声波透射法检测桩身质量的技术探讨[J].土工基础,2001,15(1):18-38.ZHONG Hui-sheng,GUO Da-bing.The discussion of testing pile quality techniques by ultrasonic wave method[J].Soil Engineering and Foundation,2001,15(1):18-38.
[9]南金生,马建军.超声波CT成像技术在桩基检测中的应用[J].地震学刊,1999,(4):43-46.NAN Jin-sheng,MA Jian-jun.Application of supersonic wave CT image to pile fundament[J].Journal of Seismology,1999,(4):43-46.
[10]董清华.混凝土无损检测方法述评[J].五邑大学学报,2005,19(11):53-57.DONG Qing-hua.A review of nondestructive methods for testing concrete[J].Journal of Wuyi University,2005,19(11):53-57.
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