顶管法施工方案(英文版) 1、MethodStatementforPipeJacking1.ConstructionofPitsThejackingpitwithadimensionof6mx5clearopeningwithdepthof250mmbelowinvertlevelofthesteelpipe.Thefloorwillbeleveledby100mmthickconcreteblindingfixingtowIbeamsinthecenterofthepitforfixingjackingframe.2.Installatio 2、nofJackingFrameAftertheconstructionofdrive,thejackingrigwillbeloweredintothepitandadjusttothecontrollineandlevel.Therigwillbeusedonthiscontractconsistoftwonumberofhydrauliccylinderswithacapacityof150toneachtogiveatotaljackingforceof300tons.Therigwillhaveguide 3、drails,pushingplateandbaseplatetohydraulicpowerbackwithcontrolunit.Thehydraulicsystemwillrunthroughadieselengineinstalledthetopofthepit.Therigwillinstalledtothecorrectlineandlevelandcheckbytheconsultantinrespecttolevelandalignment.3.ThrustWallConstructingacon 4、creteblockbehindthebaseplateoftherigtoadimensionofwillbeprovidedtotakeanddistributethejackingload.4.PipeJackingOperationAsteelshieldisusedatthefrontofthepipetoaccommodatetheminerandtoallowforsteeringofthepipejack.Thesoilwithinthenshieldismanuallyexcavatedand 5、loadedintoawheelskipfortransporttothepitbottom.Theminerdoesnotdigoutsidetheshield(bothinfrontandradically)andthefront,orcuttingedge,oftheshieldisalwayskeptburiedintheface,sostabilityismaintained.Theshieldisthususedtotrimtheexcavationtothesizeofthepipethusmini 6、mizingthepotentialforsettlementofthegroundabovethepipejack.Inthepitbottom,theskipishoistedtothesurface,emptiedandreturnedtotheusedtoloosenitpriortodigging.Theexactdiameterofshieldwillbeselectedtosuitthepushingpipes.Asexcavationcontinues,theshieldisjackingforw 7、ardusingtwohydraulicjacksthrustingfromthebackwall.Whentheshieldisburied,thejacksareretractedandthefirstsleevepipeloweredontotherails.Thisinthenpusheduptotheshieldandexcavationcanthencontinue.Whenthesleevepipeispushedhome,thehydraulicjacksareretractedandtheser 8、vices(lightingventilation)disconnected.Thenextsleevepipeisloweredontotherailsandtheservicesreconnectedandthecyclerepeatedun...
