单孔剪切波测试的原理及注意事项

2010.41222222(1)(2)ZiZi+1t1t2ZiZi+12∑=−−=−=iiiiiiiiiihSarctgtthV111coscosααα23¾¾¾¾333332.50.3—0.50.181033333333330.1ms2V80dBA/D121.0dB60dB4.0MB100MB10503313213m400kg13m3232333333PS3(1)PSP(2)SP(3)PS(4)3SSSts3tsS33Vi=hi/(ticosi—ti-1cosi-1)ViihiiticosiiTi-1cosi-1i344()420m4125m3500ms500m/s44(b)4(c)41231030m6206204GB50021—200144445555555555566150Hz616162636465666750cmX20cm686969696106106*24FD1-----7727373abC7475757576800240808PSCableHeadHeadReducerUpper(R2)ReceiverLower(R1)Receiver1.0mflexibleIsolationCylinderCombinedShandP-waveSource(S)SourceDriverWeightWinchArmored7-ConductorcableDiskettewithDataOYOPS-170Logger/RecorderOverallLength~5.8mDepthreferencelocationforR1-R2analysis:mid-pointofReceivers0.5m0.5mJointJointTip2.14m3.7mDepthreferencelocationforS-R1analysis:midpointof3.14mS-R1spacing1.57m1.05m1.07m1.07mNottoScaleOYO8PS8PS1234567891112131415161718192101020Traveltime(ms)H1/H1H2/H2V1V2IIIIII8PS123448PS