基桩质量智能提取模型研究
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摘要
针对声波反射法检测基桩质量的应用,提出了一种智能提取模型.该模型首先选取标准样本信息对系统进行训练,并提取适合于测量环境的模型参数;然后将参数输入到由FFT变换、小波去噪、Hilbert变换组成的混合模型中,提取由反射波引起的瞬时相位突变点,实现对被测基桩的缺陷位置和长度的检测.将该模型应用于水电站锚杆锚固质量检测,实测结果为:平均长度测量误差和平均缺陷定位误差分别为2.5%和2.1%,大大优于常规方法,且能在现场实时给出测量结果.
An intellectual extraction model for the engineering evaluation of pile testing was developed.First,the method selects standard sample to train the system and extract module parameters suitable for the measuring environment,then,inputs these parameters into the hybrid model based on the FFT analysis,wavelet de-noising and Hilbert transform to extract the instantaneous phase change-point caused by reflected wave.The method was applied to the bolt anchoring quality inspection on a Hydropower Station.The experimental results show that the model can output measure results in real-time automatically,and the average relative error for detecting length and defect location are 2.5% and 2.1% in turn,which is much better than the conventional method.
An intellectual extraction model for the engineering evaluation of pile testing was developed.First,the method selects standard sample to train the system and extract module parameters suitable for the measuring environment,then,inputs these parameters into the hybrid model based on the FFT analysis,wavelet de-noising and Hilbert transform to extract the instantaneous phase change-point caused by reflected wave.The method was applied to the bolt anchoring quality inspection on a Hydropower Station.The experimental results show that the model can output measure results in real-time automatically,and the average relative error for detecting length and defect location are 2.5% and 2.1% in turn,which is much better than the conventional method.
引文
[1]王军民,陈义群,陈华.高速公路锚杆锚固质量无损检测技术研究[J].地球物理学进展,2004,19(4):782-785.Wang J M,Chen Y Q,Chen H.Research on anchor barquality nondestructive testing technique on highway[J].Progress in Geophysics(in Chinese),2004,19(4):782-785.
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[7]薛桂霞,王鹏.基桩桩身完整性检测中的影响因素浅析[J].地球物理学进展,2008,23(5):1646-1650.Xue G X,Wang P.Analyzing on the influence factors offoundation pile integrity detection[J].Progress in Geophysics(in Chinese),2008,23(5):1646-1650.
[8]Dong G M,Chen J,Zhang N.Experimental study onmonitoring the attachment bolt looseness in a clamping supportstructure model[J].Engineering Asset Management,2006:964-970.
[9]Li X B,Zhou Z L,Li Q Y,et al.Parameter analysis of anchorbolt support for large-span and jointed rock mass[J].Journalof Central South University of Technology,2005,12(4):483-487.
[10]Starkey A,Ivanovic A,Neilson R D.Using a lumped parameterdynamic model of a rock bolt to produce training data for aneural network for diagnosis of real data[J].Meccanica,38(1):133-144.
[11]Elfgren L,Eligehausen R,Rots J G.Anchor bolts in concretestructures:summary of round robin tests and analysisarranged by RILEM TC 90-FMA‘Fracture Mechanics ofConcrete-Applications’[J].Materials and Structures,2001,34(8):451-457.
[12]Haroon M,Adams D E.Time and frequency domainnonlinear system characterization for mechanical faultidentification[J].Nonlinear Dynamics,2007,50(3):387-408.
[13]Rangayyan R M,Mudigonda N R,Desautels J E L.Boundary modelling and shape analysis methods forclassification of mammographic masses[J].Medical andBiological Engineering and Computing,2000,38(5):487-496.
[14]Mallat S G.A Wavelet Tour of Signal Processing[M].SanDiego:Academic Press,1998.
[15]Selesnick I W.Hilbert transform pairs of wavelet bas[J].IEEE Signal Processing Letters,2001,8(6):170-173.
[16]罗明璋,王军民,徐菲,等.声频应力波实时检测分析仪[J].振动、测试与诊断,2012,(2):292-295.Luo M Z,Wang J M,Xu F,et al.Real-time analysis systemof audio-frequency stress wave[J].Journal of Vibration,Measurement&Diagnosis(in Chinese),2012,(2):292-295.
[2]张良均,王靖涛,李国成.小波变换在桩基完整性检测中的应用[J].岩石力学与工程学报,2002,21(11):1735-1738.Zhang L J,Wang J T,Li G C.Application of wavelettransform in integrity testing of piles[J].Chinese Journal ofRock Mechanics and Engineering(in Chinese),2002,21(11):1735-1738.
[3]许峻,王刚,兰太超,等.低应变桩基检测方法在检测锚杆锚固质量中的应用[J].地球物理学进展,2010,25(4):1459-1466.Xu J,Wang G,Lan T C,et al.Application of the concretepile examination by the low-strain method to checkingstabilization by anchors[J].Progress in Geophysics(inChinese),2010,25(4):1459-1466.
[4]黄克超,陶建伟.用波形拟合方法检测桩基质量[J].地球物理学报,1996,39(S1):326-332.Huang K C,Tao J W.Detecting the quality of pile foundationwith wave shape fitting method[J].Acta Geophysica Sinica(Chinese J.Geophys.)(in Chinese),1996,39(S1):326-332.
[5]丁亮,韩波,刘润泽,等.基于探地雷达的混凝土无损检测反演成像方法[J].地球物理学报,2012,55(1):317-326.Ding L,Han B,Liu R Z,et al.Inversion imaging method forconcrete non-destructive testing based on GPR[J].Chinese J.Geophys.(in Chinese),2012,55(1):317-326.
[6]郭铁拴,赵鸿儒,杨导声,等.工程多波地震勘探在甬江过江隧道水底基础检测中的应用[J].地球物理学报,1998,41(S1):376-384.Guo T S,Zhao H R,Yang D S,et al.The application ofengineering multi-wave seismic prospecting in quality test ofYongjiang river submarine Tunneltube foundation[J].ChineseJ.Geophys.(in Chinese),1998,41(S1):376-384.
[7]薛桂霞,王鹏.基桩桩身完整性检测中的影响因素浅析[J].地球物理学进展,2008,23(5):1646-1650.Xue G X,Wang P.Analyzing on the influence factors offoundation pile integrity detection[J].Progress in Geophysics(in Chinese),2008,23(5):1646-1650.
[8]Dong G M,Chen J,Zhang N.Experimental study onmonitoring the attachment bolt looseness in a clamping supportstructure model[J].Engineering Asset Management,2006:964-970.
[9]Li X B,Zhou Z L,Li Q Y,et al.Parameter analysis of anchorbolt support for large-span and jointed rock mass[J].Journalof Central South University of Technology,2005,12(4):483-487.
[10]Starkey A,Ivanovic A,Neilson R D.Using a lumped parameterdynamic model of a rock bolt to produce training data for aneural network for diagnosis of real data[J].Meccanica,38(1):133-144.
[11]Elfgren L,Eligehausen R,Rots J G.Anchor bolts in concretestructures:summary of round robin tests and analysisarranged by RILEM TC 90-FMA‘Fracture Mechanics ofConcrete-Applications’[J].Materials and Structures,2001,34(8):451-457.
[12]Haroon M,Adams D E.Time and frequency domainnonlinear system characterization for mechanical faultidentification[J].Nonlinear Dynamics,2007,50(3):387-408.
[13]Rangayyan R M,Mudigonda N R,Desautels J E L.Boundary modelling and shape analysis methods forclassification of mammographic masses[J].Medical andBiological Engineering and Computing,2000,38(5):487-496.
[14]Mallat S G.A Wavelet Tour of Signal Processing[M].SanDiego:Academic Press,1998.
[15]Selesnick I W.Hilbert transform pairs of wavelet bas[J].IEEE Signal Processing Letters,2001,8(6):170-173.
[16]罗明璋,王军民,徐菲,等.声频应力波实时检测分析仪[J].振动、测试与诊断,2012,(2):292-295.Luo M Z,Wang J M,Xu F,et al.Real-time analysis systemof audio-frequency stress wave[J].Journal of Vibration,Measurement&Diagnosis(in Chinese),2012,(2):292-295.
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