三峡大坝混凝土设计及温控防裂技术突破

295200910Vol.29No.5AdvancesinScienceandTechnologyofWaterResourcesOct.2009:(1940),,,,Email:[e-mail]:10.3880/j.issn.10067647.2009.05.012三峡大坝混凝土设计及温控防裂技术突破郑守仁(,430010):介绍三峡工程大坝混凝土设计及温控防裂技术的创新方法:大坝混凝土设计从传统的混凝土强度设计转为将混凝土耐久性与强度设计并重,采取了提高大坝混凝土耐久性的措施;在大坝混凝土温度控制及防裂技术中,首次提出并应用个性化!通水冷却方案,混凝土施工监控实施天气预警温度控制预警及间歇期预警制度,以及细化的综合防裂措施,取得了显著成效:重力坝;大体积混凝土;温度控制;防裂技术;三峡水利枢纽工程:TV63263;TV331:A:10067647(2009)05004608Innovationsinconcretedesign,temperaturecontrolandanticrackingtechniquesforconcreteconstructionofThreeGorgesDam//ZHENGShouren(ChangjiangWaterResourcesCommission,Wuhan,Hubei,430010)Abstract:Theinnovativemethodsofconcretedesign,temperaturecontrolandcrackpreventiontechnologyoftheThreeGorgesProjectDamareintroduced.TheconcretedesignoftheThreeGorgesDamisdifferentfromtheconventionaldesign,whichonlyconsidersconcretestrength;itisanintegrateddesignthatconsidersconcretedurabilityandstrength,andtakesmeasurestoimprovethedam∀sconcretedurability.Fortemperaturecontrolandpreventionofcrackingindamconcreteplacement,somemeasuresareputforward,includingindividuationwatercooling,weather,temperaturecontrol,andintermissionearlywarningsystemsforconcreteconstructionmonitoring,aswellasdetailedintegratedcrackcontrolmeasures,whichareanotableachievement.Keywords:gravitydam;massconcrete;temperaturecontrol;anticrackingtechnology;ThreeGorgesProject(1),1850m,23095m,1810m98800m3/s,1750m;10%124300m3/s,1804m,4830m,23,70m90m,900m;280m,1580m(2),22,60m85m,16560m,3570m,26,,1080m,124m,745m,700m900m()1,100m,120m,1330m;#1,70m100m,1300m,,2(1020m,55m,96m)1610m3,3:();;,,,,,,,;∃46∃水利水电科技进展,2009,29(5)Tel:[phone]Email:[e-mail](:m),,,,,,,,,,,1/10,,,,(Norfork),(ReveIstoke)(Dworshak)(RichardB.Russed);;,,,,,0032/m3();3965m3,1,111,,1∃47∃水利水电科技进展,2009,29(5)Tel:[phone]Email:[e-mail]~055302mR90200F150W10%85%88050~05530~35R90150F100W8%70%75055~06040R90200F250W10%85%8805025R90250F250W10%85%8804520R28300F250W10%8504520R90300F250W10%8504520R28400F250W10%9003510~15R90400F250W10%9003510~15R90150F200W8%70%7505040RCCR90100F150W6%60%6505050RCC12,,,,,:&,,,;425,MgO,,;,;;(055,050,045;050),(40%,30%,35%,10%~20%)a.,,,,,F100F150F250,&,,b.,,,,,,c.,,,,,,045,20%,28d126cm,50a,6cm,500ad.,,,&4%MgO,,,85∋10-6(90d);,382∋10-6(90d);,199~229(;,(15~45)∋10-6,e.,,,,,∃48∃水利水电科技进展,2009,29(5)Tel:[phone]Email:[e-mail](R28400)23kg/m3,(25kg/m3)4(:m)221210m,1267m,2(3),570m;,383m,25m133m,1180m,2(4),430m22221基础温差标准a.1750m,180(,1070m140(,140(760m170(,100m150(,173(,,45(,1500m170(3(:m),1146~147(,23155~158(;1144~146(,23147~150(b.,2∃49∃水利水电科技进展,2009,29(5)Tel:[phone]Email:[e-mail](L)20mL=21~30mL=31~40mL=41~50m2221~3019~1716~15142524~2322~2019~1817:L,0~02L,02~04L222上下层温差标准28d,,05L,L/417(;05L,223坝体表面保护标准a.,2~3d6~8(,2~3d3~4db.,,,,224坝体最高温度控制标准,33(122311410596~8R90)20023~2426~273133~3435~38R28%25024~2628~2931~3334~3537~39:225设计允许最高温度,;,331,425,,,&,,,,,28d80∋10-685∋10-6,90d85∋10-688∋10-632a.,,,025,(800~1050m),4~6(,017~018,b.,122,12~14((7();113,16~18((14(),,15(33,,,,10MPa80~100m,10m,120m;,,3()21MPa,19MPa,,8,(03m)∃50∃水利水电科技进展,2009,29(5)Tel:[phone]Email:[e-mail]~9,1020045,34a.11315~20m,4~1015m;20m,30m,20065185m:∗30m(15m∋15m)+122,10(,;31114(,41016(,5~918(,6~8(,30m9~10d,b.,3d,10d35a.,,;b.6~8m,10~12m36,,15~201065m60d,21~251065m40d:a.50cm(50cm)1kg/m3b.40m1/3140m25@20,22@20,L4m5m();1/325@20,10m5cm,6cm37a.,,(,6~833(5931(,12~14(,),,,6~8(,10~15d,12h,18L/minb.,,:5~8,9;49,10;1011,15~25,20~22(,18~25L/minc.1~2d,,4~108~10(,,(18~20()18L/mind.!,20~22(,,,20~22(,,,,!∗!,∃51∃水利水电科技进展,2009,29(5)Tel:[phone]Email:[e-mail](25~30L/min),(18~20L/min),,+,,5~10d,;9,,10d,20~22(18~20(4200320042005200320042005//(//(//(//(//(//(Tp)14(23728710957912888024021131134109111295Tp)16(486108773929521044031501473128879130Tp)18(60103403510465611157141616613553251203Tp)20(63312313851252526147115815038,,,,,:∗,,15~25cm20~30cm+,(0042W/(m∃K),980m,50cm,30cm;1,30cm,(15cm)−,3~5d3912~18h,,,28d3103,3a.,b.,,;2~3(,,3(1h);,2~3(,c.7d,10d,,;,,,441442a.∗:107(,180(,73(,208L/min,251(;+:150(,182(,32(,229L/min,213(∃52∃水利水电科技进展,2009,29(5)Tel:[phone]Email:[e-mail]~11065~1080m1515245m2b.9,11,1115217(,(200~220()432004177,183,:R90150343(,294(,100%;R90200275(,256(,100%;R90250333(,265(,100%;R90300364(,286(,959%;R90400323(,304(,100%2005221,230,,78(442003924103,1822025cm182238~244(,06(,203(;140~350(,210(,268(202244~259(,15(,201(;140~350(,210(,263(:5cm10(,3cm7(;6(45,55(),,,(800~1050m),,,,4~6(,017~018,3,!,20~22(18~20(,,,,30m,,,:[1].[R].:,2006.[2].[M].:,2003.[3].[M].:,1999.[4].[C]//.:,2003:761770.[5].(156m)[R].:,2006.(:20081023:)∃53∃水利水电科技进展,2009,29(5)Tel:[phone]Email:[e-mail]