硫酸盐渍土路基盐冻胀变形理论修正与应用

《硫酸盐渍土路基盐冻胀变形理论修正与应用》由会员上传分享，免费在线阅读，更多相关内容在行业资料-天天文库。

1、万方数据北京交通大学硕士学位论文ABSTRACTABSTRACTWiththereciprocalinfluenceofmoisture，salt，heatandstress，sulphatesaltysoilcancausepavementsaltexpansioncrack，aggravatefrostheave，boilandpavementerosion．Forthelackoffour—fieldcouplingtheoryduringsaltexpansionandnumericalanalysisofsalt—frostheavedeformationo

2、fsulphatesaltysoil，itisnecessarytoresearchonthemechanismandruleofsalt-frostheavedeformationofsulphatesaltysoil，toprovidethebasisforroadconstructionandroaddiseaseprevention．Topreciselycalculatethesalt一行ostheavedeformationofsulphatesaltysoil，thepaperimprovesthefour-fieldcouplingtheoryacco

3、rdingtothemechanismofsalt．frostheavedeformationprimarily．Inthenextsectionofthispaper,thetheoryisappliedtoComsolMultiphyrsitsfiniteelementsoftware，tocalculatethesalt．frostheavedeformationoftheroadsubgradetestsectionofsulphatesaltysoilofXinjiangagricultural21th．24thgroup．Inthethirdpartoft

4、hispaper,theresultofcalculatedvalueandsimulationvalueofdisplacementarecompared．Themainresearchcontentsandresultsareasfollows：(1)Basedonhydrodynamicmodelandthelawofconservationofmass．theequivalentsaltcontentandequivalentmoisturecontentareestablishedintheequationsofmoisturefieldandsaltfie

5、ld，whichsimplifiedthecouplingdynamicmodelofmoisture．salt—heat—stressduringsaltexpansionprocessesofsalinesoilasthecouplingfactors．Twoimportanteffectswhichincludetheeffectofsolutediffusionandhydrodynamicdispersionandtheeffectofphasechangeofsaltcrystals—saltsolutiononsalttransferhavebeenta

6、kenintoconsideration．Accordingtotheconservationofenergy,theeffectofsalinesoil’Sphasechangelatentheatisaddedwhichmakestheequationoftemperaturefieldmorefittedforthepracticalsituationofengineering．(2)Inordertoimplementthecalculationofsalt—frostheavedeformation．thereactionrateofglauber’Ssal

7、tisaddedandthefrostheavingandsaltexpansionistakenintounifiedconsideration．(3)ThefieldtestsectionoftheulphatesaltysoilsubgradewasselectedinXinjiangandthelocalsubgradetemperature，distributionofmoistureandsalt，salt．frostheavedeformationlawofsubgradeweremonitoredlong．termly．Thedata