关于单桩竖向抗压静载试验应注意的问题

200988(131)JOURNALOFRAILWAYENGINEERINGSOCIETYAug2009NO.8(Ser.131)X:2009-03-17XX:,1954,,;,1964,,:1006-2106(2009)08-0015-03XXX(,610031)::,:,,,,,,2.0,2h,;,:;;;;:U443:AIssuesforCautionontheVerticalCompressiveLoadTesttoSinglePileCHANGJv-you,WANGZi-jiang(ChinaRailwayEryuanEngineeringGroupCo.Ltd,Chengdu,Sichuan610031,China)Abstract:Researchpurposes:ThispaperdiscussestheissuesforcautionontheverticalcompressiveloadtesttosinglepileaccordingtoTheTechnicalRulesforTestTechnologyforRailwayEngineeringFoundationPilesforguidingtheengineeringworks.Researchconclusions:Tocorrectlydotheverticalcompressionloadtesttosinglepile,attentionshouldbepaidtotheinsituoperationaldetailedrulesandregulations,theslowmaintainedloadtestmethodshouldbeadopted,thefoundationbearingcapacityshouldbearthecompressivestress,theusedinstrumentsandequipmentsshouldbeintheperiodofvalidity,themaximumeffectiveloadcapacityofthebasebeamshouldbenotlessthan2timesofthecharacteristicsnumberofthedesignbearingcapacityofsinglepilewithfixingoneendofthebasebeamandsimplysupportingtheotherend,thetimeofloadingeverylevelshouldnotbelessthan2hourswithachievingarelativelystablesettlement,thecharacteristicsnumberofverticalbearingcapacityofsinglepileshouldbeahalfoftheultimatebearingcapacityofsinglepileinverticalcompression,andthewholeprocessshouldachievethestandardizationandthesequencing.Withallthese,theaccurateverticalbearingcapacityofsinglepilecanbetested.Keywords:railwayengineering;testoffoundationpiles;technicalrules;loadtesttosinglepile;bearingcapacity200871,,,,,,11.1,1.2,31.3,,,,4,,,:(1),;(2)1.51.3;,1%,0.480%1.4(1)0.1%FS,0.01mm(2)500mm,4;500mm2(3)200mm,(4),,(5)()(6)(50mm),(JJG379)1:40m8m,0.1%FS,,,1m,,5,,,,1.5()():0.8m,5;0.8m,4m1.6,2.0;,;,2.01.7(1)(2)10cm,,,23,,(3),,1.8(1),;1/10,26120098(2),2,(3),10%1.21.9(1)515304560min,30min(2):1h0.1mm,2(30min,330min)(3),(4),1h,153060min,,,3h,1530min,30min2h1.10(1),540mm,40mm(2),2,24h(3)(4),(5)-,6080mm;,80mm,,1.11Qu(1)-(Q-s)-(s-lgt),:Q-s,(2):s-lgt(3)102,(4)Q-s,s=40mm;800mm,s=0.05D(D),1.12(1),30%,(2)30%,,,(3)33,3,1.13Ra2:(1)(2)1.5(3)(4),,(5)()(6)2.0(7)(8)1.2(9)2h,(10)(11)Qu(Q-s)(s-lgt)(30)718:,4.5m5m,()5m;5m,1g:1m,95cm,300kg(),()2.4,()(PC),;JG/T169JC680GB/T196313TB/T31222005,;,,:(1),;,,(2),:[1]TB/T31222005,[S].[2],.[R].:,2004.[3],.[R].:,2008.[4]DS80001RLE,Germanrailway:Direciveforrailwayinfra2structure:Noisebarriersattrainlines[S].[5]ZTV-Lsw88,AdditionalTechnicalRegulationsconcerningNoiseProtectionWalls[S].[6].[S].[7].[R].:,2006.[8].[R].:,2008.[9]GB/T1415393,[S].[10]GB/T152272007,[S].[11]GB/T210862007,[S].[12]JG/T1692005,[S].[13]JC6801997,[S].[14]GB/T196312005,[S].()(17)(12)30%(13)Ra:[1]JGJ1062003,[S].[2]TB102182008,[S].[3]JGJ942008,[S].[4]GB500212001,[S].[5]TB100132004,[S].[6]TB101022004,[S].[7]GB/T501231999,[S].[8]JGJ792002,[S].[9],,.[J].,2008(2):35-39.[10].[J].,2008(2):31-34.()0320098