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PCC桩低应变反射波法检测时速度波形成机制探讨 被引量:7

Formation mechanism of velocity waves in low strain integrity testing of PCC pile
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摘要 现浇混凝土大直径管桩(PCC桩)低应变检测时,桩头附近存在着明显的三维效应,表现在与激振点夹角不同的测点的速度响应存在着明显的差别。基于所建立的解析公式,研究了桩顶各振动模式的动力响应特征,分析了桩顶总体速度响应沿环向和径向的变化规律。研究结果表明:90o点的总体速度响应主要来源于轴对称模式,45o点、135o点和180o点的桩底反射峰大小和到达时间与轴对称模式接近,但入射波峰大小和到达时间与轴对称模式差别较大;桩顶速度响应主要来源于径向第1阶的模式,第2阶以上的模式贡献较小;各点速度响应主要是前几阶模式的叠加结果,环向第10阶以上的振动模式对总体速度响应的贡献较小;各模式对入射波峰的形成都有较大贡献,但反射波峰主要来自轴对称模式的贡献;高频干扰峰主要来自第1阶非轴对称模式,各点干扰波峰值、相位不一,90o点干扰波峰值最小,0o~90o点与90o~180o点相位相反;环向各点的速度响应差别较大,但沿径向的变化却不很明显。 The three dimensional effect in low strain integrity testing of cast-in-place large-diameter pipe pile(PCC pile) is mainly presented by the difference of velocity responses at the points with different radius angles between exciting and receiving points. Based on the analytical formula founded by the authors, the dynamic response characteristics of every vibration modes are studied. The variations of total velocity responses on pile top along circumferential and radial directions are analyzed. The research indicates that: the total velocity response at 90 point mainly derives from the axisymmetric mode. The reflected wave crests at 45°, 135° and 180° point are close to the axisymmetric mode; but the incident wave crests have a greater difference. The total responses on pile top mainly derive from the first order vibration mode along radial direction, while the other modes along radial direction have little contribution. The velocity responses are the superposition of low order modes; but the circumferential modes higher than tenth order have little contribution. The incident wave crests derive from many modes, while the reflected wave crests mainly derive from the axisymmetric mode. The high-frequency interference waves mainly derive from the first order non-axisymmetric mode, the peak value and phase of which are different from various points. The high-frequency interference at 90° point is the least; and the phase from 0° to 90° point is contrary to that from 90° to 180° point. The velocity responses have little difference among different points along radial direction but have great difference along circumferential direction.
出处 《岩土力学》 EI CAS CSCD 北大核心 2012年第1期154-161,共8页 Rock and Soil Mechanics
基金 国家自然科学基金资助项目(No.51008115) 江苏省自然科学基金创新学者攀登项目(No.BK2008040) 河海大学中央高校基本科研业务费资助项目(No.2010B20514 No.2011B04514)
关键词 大直径管桩 低应变检测 三维效应 振动响应 解析解 large-diameter pipe pile low strain integrity testing three-dimensional effect vibratory response analytical solution
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参考文献12

  • 1刘汉龙,费康,马晓辉,高玉峰.振动沉模大直径现浇薄壁管桩技术及其应用(Ⅰ):开发研制与设计[J].岩土力学,2003,24(2):164-168. 被引量:144
  • 2LIU H L, FEI K, XU X T. Development and application of the large-diameter driven cast-in-place concrete thin-wall pipe pile[C]//Proceedings of the 16th International Conference on Soil Mechanics and Geotechnical Engineering. Osaka: lOS Press, 2005:2137 -2140.
  • 3PAVLAKOVIC B N. Leaky guided ultrasonic waves in NDT[D]. London: Department of Mechanical Engineering, Imperial College of Science, Technology and Medicine, University of London, 1998.
  • 4DUAL JURG, HAGELI M, PFAFFINGER M R, et al. Experimental aspects of quantitative nondestructive evaluation using guided waves[J]. Ultrasonics, 1996, 34: 291 -295.
  • 5LIKINS G E, RAUSCHE F. Recent advances and proper use of PDI low strain pile integrity testing[C]//Sixth International Conference on the Application of Stress- wave Theory to Piles. St. Paul: CRC Press, 2000: 211- 218.
  • 6MASSOUDI N, TEFFERA W. Non-destructive testing of piles using the low strain integrity method[C]// Proceedings of the Fifth International Conference on Case Histories in Geotechnical Engineering. New York: [s. n.], 2004: 13-17.
  • 7陈凡,罗文章.预应力管桩低应变反射波法检测时的尺寸效应研究[J].岩土工程学报,2004,26(3):353-356. 被引量:50
  • 8黄大治,陈龙珠.钢筋混凝土管桩反射波法的三维有限元分析[J].岩土力学,2005,26(5):803-808. 被引量:21
  • 9费康,刘汉龙,张霆.PCC桩低应变检测中的三维效应[J].岩土力学,2007,28(6):1095-1102. 被引量:26
  • 10CHOW Y K, PHOON K K, CHOW W F, et al. Low strain integrity testing of piles: Three-dimensional effects[J]. Journal of Geotechnieal and Geoenvironmental Engineering, 2003, 129(11): 1057-1062.

二级参考文献16

  • 1黄大治,陈龙珠.钢筋混凝土管桩反射波法的三维有限元分析[J].岩土力学,2005,26(5):803-808. 被引量:21
  • 2费康,刘汉龙,张霆.PCC桩低应变检测中的三维效应[J].岩土力学,2007,28(6):1095-1102. 被引量:26
  • 3歌德赫G 张清(译).有限元法在岩土力学中的应用[M].北京:中国铁道出版社,1983.245-264.
  • 4CHOW Y K, PHOON K K, CHOW W F, et al. Low strain integrity testing of piles: Three-dimensional effects[J]. Journal of Geotechnical and Engineering, 2003, 129(11): 1057-- 1062
  • 5地基处理手册编写委员会.地基处理手册(第二版)[M].北京:中国建筑工业出版社,2000..
  • 6中国建筑科学研究院地基基础研究所.建筑科学研究报告--低应变反射波法测试分析方法的完善[R].,1996..
  • 7考尔斯基H著 王仁 译.固体中的应力波[M].北京:科学出版社,1958..
  • 8徐攸在.桩的动测新技术(第二版).北京:中国建筑工业出版社,2003.
  • 9Finno R J,Gasman S L.Impulse evaluation of drilled shafts[J].Journal of Geotechnical and Geoenvironmental Engineering,1998,124(10):965-975.
  • 10Hearne T M,Stokoe K H and Reese L C.Drilled-shaft integrity by wave propagation method[J].Journal of Geotechnical Engineering,1981,107(10):1 327-1 344.

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