超声法诊断混凝土损伤层厚度(精)

吕列民崔德密(233000):,,,,,:DIAGNOSISOFTHICKNESSOFDAMAGEDCONCRETEBYULTRASONICMETHODL™LieminCuiDemi(AnhuiQualitySupervision&DetectionCenterofBuildingEngineeringBengbu233000)Abstract:Thethichnessofadamagedconcretecanbeobtainedbythefollowingsteps:Aplanemeasurementisusedtoarrangesonicmeasuringpoints;thesonicvelocityoftheconcretewithinanondestructivezoneismeasuredfirst,andthensonicpropagationtimeofdifferentmeasuringpointswithinadamagedzoneandtheircorrespondingplanemeasureddistancesareused,whichcanbetransformedbyformulas.Thismethodfeaturesconvenienttesting,simplecalculationandexcellentpracticality.Keywords:concreteultrasonicmethoddamagedthickness:196311:2004-06-30,,,,,,,,,1,,(),,(),,,,,,22113~41:Vi=LiPti(i=0,1)(1)L))),mm;t))),Ls;V))),kmPs;/00,/102.2损伤层厚度计算方法/yy0V1V0,t1,t0,$t=t1-t0\0$th,:L=2hPcosA81IndustrialConstructionVol135,No12,2005工业建筑2005年第35卷第2期a-;b-1L=V0#t1l1=L-L:l1=V0#t1-2hPcosAh=0.5cosA(V0#t1-l1)(2)A60b,h=0.25(V0#t1-l1)(3)3,600mm@450mm,200250300350400mm,,,20mm,,t1,l1V0,(3)11123451-11-21-32-12-22-33-13-23-34-14-24-3V0Pkm#s-1l1Pmmt1PLshPmml1Pmmt1PLshPmml1Pmmt1PLshPmm417541694173418341784166416941624167417141714174418341754162200250300350400631777138415941510317251228172417241022142052553053554056811791388111001510815291129182717291826182032533033534036717761588119717108192911271028122710271841722510281627181:3,15,4162~4183kmPs,4172kmPs,01064kmPs3,15,2214~2918mm,2712mm,2121mm,2115~23mm44.1工程基本情况k80+03215,4119m,510m,215m,,,30cm199411,,,,4.2无损区声速值测试,5,3,304050cm,,22123V0P(km#s-1)4184418841864178418041814180345V0P(km#s-1)418341824179418041814186418741862V0:V0=4183mPs,SV0=01032mPs4.3损伤层厚度测试与计算,,,,(3)134.4钻芯量测损伤层厚度30mm,,6,18~25mm,(102)82工业建筑2005年第35卷第2期Ne012~013,2)Ne,k60~90,Ne013,ÓC25,ÒC203)(HPB235)(C25C30),Ne01128~01261,,,Ó,,212经济相对受压区高度的经济分析Mk1fyfcM80kN#m700kN#m,k150~100,ÒÓ,C20C25C30,,:1)ÒC20ÓC25,Ne+011NeNe-011,3%,012~014,,016%~115%2):[600mm,50mm;600~900mm,100mm,,,,2%,,,31),,012~013,,,013~014,2),ÒÓ,50~100(),C20,h=40M,C25,h=38M,C30,h=3615M,,M,kN#m,h,mm3),,,4),,,,,1,..,2000,30(8):48~512,..,2003(3):9~123..,1998(3):27~294,..,2001(8):46~485,..:,1998(3)6GB50010-2002(82)3123PmmPmm91115LPmmtPLshPmmLPmmtPLshPmmLPmmtPLshPmm300400500851810813128192816301830173054055008516111111281527113219301232042052087151071313013251224152713301022301123251718:85,3,,,,,51),,,2),A,,102工业建筑2005年第35卷第2期