剑桥雅思真题 2.docx
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1、加加CVCmapmakers.TheriveruildsIhUmup,theseawearsthemdown;theiroutlinesarcalwayschanging.ThechangesinChina1sPearlRiverdelta,however,aremoredramaticthanthesenaturalfluctuations.AnislandsixkilometreslongandWithaEtaareaof1248hectaresisbeingcreatedthere.Andthecivilengineersarea$interestedMperformanceasinsp
2、eedandsize.ThiSisabitofthedeltathattheywanttoendure.ThenewislandofChekLaPKok,thesiteofHongKonglsnewairport,isS?3%compeie.ThegiantdumperIrUCkSrumblingacrossitwillhavefinishedIheirjobbyth亡middleofIhiSyearandtheairportitselfwillbebuiltatasimilarlybreakneckpace.AsChekLaPKokrises,however,anotherrewAsiani
3、slandissinkingackintoIhesea.Thisisa52仆-hectareislandbuiltinOsakaHay,Japan,thatservesastheplatformforthenewKansaiairport.ChekLapKokwasbuiltinadifferentway,andthushopestoavoidthesamesinkingfate.TheusualwaytoreclaimlandistopilesandrockonIotheWblXLWhertheseabedoozeswithud1thisisratherlikeplacingatetbook
4、onaWeISPGnge二theweightsqueezesthewatercut1causingbothwaterandspongetosettlelower.Thesettlementisrarelyeven:diftcrcpartssinkatdi11cruirales.Sobuildings、PiPgrsadsandsoQIltendtobuckleandcrack.YoUcanengineeraroundtheseproblems,oryoucanengineerthemout.Kansaitookthefirstapproach;ChekLaPKokistakingthesecon
5、d.Thedifferencesarebothpoliticalandgeological.KatisaiwasupposedtobebuiltjsOnekilometrecfTshore,whereIhUseabedisquitesolid.FishermenroeekandIheSitewasShiftedafurtherfivekilometres.Thalputilindeeperwater(arnund20metres)andaboveaseabedIhatconsoledof20metresofSOnalluvialsiltandmuddeposits.Wcrsefbe1witwa
6、sanct-ve*y-firmglacialdeposithundredsofmetresthick.IheKansaibuildersrecognisedthatsettlementwasinevitable.SandwasdrivenintoIheWatICdtostrengthenitbeforethelandfillwasPiIedonIoptinHnatlempltoslowIheprocess;butthishasnotbeenaseflcriveashadbeenhoped.Tocopewithsettlement,Kansaisgiantterminalissupportedo
7、n900pillars.EaCbofthemcanbeindividuallyjackedup,allowingwedgestobeaddedunderneath.Thatisca11rtokeepthebuildinglevel.HUtitcouldbeatrickytask.ConditionsaredifferentatChekLapKok.Therewassomelandtheretobeginwith,theoriginallittleislandofChekLapKokandasmalleroutcropcalledLamChau.Betweenthem,thesetweoutcr
8、opsofhard.WealhUredZraniiemakeupaquart盯ofIhenewislandssurlacearea,UriforiiiiiaLeIy,betweentheislandsIliereWaSalayerofsoilmud,27metresthickinplaces.AccordingIoFransUiterwijk,aDUIChrnanWhoistheproiecsreclamationdirector,itwouldhavebeenpossibleloleavethismudbelowthereclaimedland,andtodealwidIheresultin
9、gsettlementbytheKansaimethod.ButtheconsortiumthatWpntheconlractfortheislandoptedibramoreaggressiveapproach.IlassembledtheworldslatestfleetOfdredgers,whichsuckedup150mcubicmetresofclayndmudanddumpedilindeeperwaters.AlIhcsametime,sandwasddgedfromthewatersandpiledontopofthelayerofSMTdaythattheInaSSiVed
10、redginghadhidbare.Norwasthesandtheonlythingused.Theorigingraniteislandwhichhadhill$upto120metreshighwasdrilledandblaskdintobouldersnobiggerthantwometresindiameter.Thisprvidcd70mcubicmetrvsQfgranitetoaddtotheislandsfbundatiQnS-BCCinlsCIheheapobouldersdoesnofillthespaceperfectly,thisrepresentstheequiv
11、alentoflSmcubicmetresoflandfill.MostOftherockwillbecomethefoundationsfortheairports11i11waysanditstaxiways.ThCsanddredgedfromthewaterswillalsobeusedtoprovideatwo-metreCaPPinglayeroverthegraniteplatform.ThismakesileasierforutilitiestodigLrenchcs*graniteisunyieldingAiffMostoftheterminalbuildMgSwillbep
12、acodabovetheSitCoftheexistingisland.Onlyalimitedamountofpile-drivingisneededtosupportbuildingfoundationsaboveSOfiCrareas.ThecompletedislandwillbesixtosevenmcrcsaboveSCakvd.Inall,350mCUbiCmetresofmaterialwillhavebeenmoved.Andmuchofit,liketheoverloads,hastbemovedseveraltimesbeS弹reachingit$finalresting
13、place.Fqrexample,therehastobeRmotcrvaycapableOfcarrying150tncdump(cks;andtherehastobearaisedWCafthe15.000c0structionworkers.Thesearetemporary;theywillberemovedwhentheairportisfinished.Theairport,though,isheretostay.Toprotccit,thenewcoastlineisbeingbolsteredwithafrmidabletwelvekiloetresofSeadefences.
14、ThebruntofatyphoonwillbedcHcctedbytheneighbouringislandofLantaui由亡seaWaIlSshouldguardagainsttherest.Gentlerbutmorepersistentbadweather-thedownpoursofthesummermonsoon-isakobeingtakenintoaccount.Amat-likematerialcalledgeotextileisbeingIaidacrosstheislandtoseparatetherockaridSandlayers.ThatwillstopSand
15、paniclesfrombeingwashedintothekvoids,andsocausingfurthersettlementThisislandisbeingbuiltnevertobesunk.Questions 69Complete Zhelahelson Diagram B 方/。例Choose your answersfiom the box below the diagram and write them in boxes 6-9 OnyoItr answersheel.NB Therearemore words/phrases than spaces, soyou will
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