大庆地区给水管道合理埋深的数值研究

255201410JournalofWaterＲesources＆WaterEngineeringVol．25No．5Oct．20142014-03-272014-05-292012BAJ25B10513760801964-、、。1988-。DOI10．11705/j．issn．1672－643X．2014．05．006aba．b．130118PPＲ－PVC。MatlabDN50PPＲ－PVC1．5m。1．5mPPＲ－PVC。TV52A1672-643X201405-0028-04NumericalinvestigationofoptimalburieddepthofwatersupplypipeinDaqingregionBAILiaWANGYanba．KeyLaboratoryofSongliaoAquaticEnvironmentMinistryofEducationb．SchoolofMunicipal＆EnvironmentalEngineeringJilinJianzhuUniversityChangchun130118ChinaAbstractFrostheaveoftencausesdamagetoruralwatersupplypipeinDaqingregion．Thereforethepa-perproposedakindofcomprehensiveanti-freezingtechnologyofshallowburiedpipewithinsulationlayer．Inordertobetterdeterminetheoptimalburieddepthofpipelineitstudiedtheparametersoffrostheavebycomparisonanalysisofnumericalcalculationandmeasuringresult．secondlyitestablishedtheunsteadyheattransfermodelwithMatlabsoftwareandsimulatedthesoiltemperaturefieldarounddifferentpipedepths．TheoptimaldepthusedbyPPＲ-PVCtypethermalmaterialofDN50pipeis1．5metersinDaqingregion．Thepipelinehereislessdisturbedbyatmospherictemperaturetherangeofthawislargethefrostheaveofsoilisweak．ConsideringtheeffectofmoisturemigrationandglacialphasefactorThesimulationindicatedthattheoperationofPPＲ-PVCtypewatersupplypipelinewhichisburiedundergrounddepthof1．5metersissafeandreliable．Keywordswatersupplypipelinefrostheavethawbulbicewaterphasetransitionmoisturemigrationmoisturecontent1、。。。1。1/9。2。、。46°。1．00～2．50m3。6－19．60℃2．30m1．00～1．50m。。。。22．14。《GB5007－2002》3．50%～6．00%1．00%≤η≤3．50%。h=珋fz1珋f=αw－wp2fi=2珋f1－ziz3η=hzi4v=ΔZT5hmzm2．14m珋fw%50%wp%wp25%fizimη%α0．2vm/dΔZmTd。1．201．501．80m1。11．50m2．90%1．50m。。1m%m/dZihηV1．200．094．400．051．500．062．900．071．800．041．600．002．2。30cm0．60～2．40m2013-12-20－2014-03-151。1．20m33d1．50m21d1．80m。51．20m0．05m/d1．5m0．07m/d1．80m0．00m/d。61．5m。133．1———PPＲPVC925。。3．21q1=062t2=t073q3=084λ4tn|4=ht4－te9te=t0+Acosωτ+φ109－13λ9－13tn|9－13=αit5－8－t9－1311λ4W/m·℃h4W/m·℃t0℃te℃A℃ωrad/aτaφradt0℃λ9－13W/m·℃αiW/m2·℃te℃T5－8℃。。。3．3、07。TρcpTτ+ρcpvΔT=λT123．4DN50mm0．03W/m·℃50mm45．00kg/m32380．00J/kg·℃10．00℃1840．00kg/m3990．00J/kg·℃1．80W/m·℃。1．20、1．50、1．80m26．00℃1．8m－2．00℃1．50m－4．00℃1．20m－6．00℃．MatlabPDE30d82。21．20、1．50、1．80m30d1。。31．20m1．501．80m1．20m1．501．80m。2032014。9。1．50m1．80m1．20m。1．20m1．80m。1．501．80m。、1．50m。3．5、。10cp=cf+cu－cfΔTT－T1+L1+wΔwiΔT13λ=λf+λu－λfΔTT－T114T℃LT1wΔwi。0．50cp990．00J/kg·K1600．0J/kg·Kλ1．80W/m·℃1．15W/m·℃。1．5m50%3。31．5m90d1。2。0℃0℃。1．50m90d3．00～5．00℃。。411．2m1．5m1．8m。21．20m33d1．50m21d1．80m。31．2m1．5m1．8m。4Matlab1．5m。36135。。2、。MK。3、。。1．J．2012341112－14．2．J．201031627－29+42．3．D．2009．4．30aJ．2001233323－327．5．46J．201139137782－7960．6DongXNLiXMLinYPetal．CharacteristicsoficeregimeinthelowerYellowＲiverJ．AdvancesinWaterScience2008196882－887．7．BPJ．2011769－71+75．8．J．2014321120－122+127．9DuYHHaoZCJuQin．FeatureanalysisandpredictionoficeregimeinthesourceregionoftheYellowＲiverC∥．IAHS－IAPSO－IASPEIAssemblyGothen-burgSmeden檵檵檵檵檵檵檵檵檵檵檵檵檵檵檵檵檵檵檵檵檵檵檵檵檵檵檵檵檵檵檵檵檵檵檵檵檵檵檵檵檵檵檵檵檵檵2013．6．3151．5m90dPPＲ－PVC。。。、。1．D．2011．2．J．201233122163－2166．3．J．1993152272－277．4．M．2013．5．J．201025451－53．6．Q2J．20113091912－1917．7．J．200929453－56．8．Matlab7．0M．2004．9．D．2005．10．J．2012434139－142．632014