Heinke Tunnel Segment GasketsTrelleborg Ridderkerk BV

Benefits of elastomeric TSGsHeinke Tunnel Segment Gaskets:•areeasytoinstall;

•createaneffectivesealwhenboltsare tightened,immediatelycreatingdryjoints;

•assureaneffectivesealdespitegroundmovementandalternatingwetanddry conditions;

•haveaprovenreliability,eliminatingthe needforacostlyremedialworktoseal leaksafterconstruction;

•andhaveaprovenrecordofdurability, beingresistanttochemicalattackand microbiologicaldegradation.

Photography:TonPoortvliet

ThepolicyatTrelleborgRidderkerkBVistodesign,produceandsupplyrubberproductstomatchthedesires,requirementsandexpectationsofthecustomer.ThebasisofourpolicyistheTrelleborgGroup‘CodeofConduct’policystatementonourwebsitewww.trelleborg.com.Duringthedesignofproductsandprocesses,theenvironmentandhealthandsafetycomprisekeyaspectsoftheprocess.

Trelleborg Ridderkerk BV uses an integratedmanagementsysteminlinewithinternationalstandardssuchasISO9001,ISO14001andSCC**2008/05Petrochemical

Quality, environmental and health and safety policy

TrelleborgRidderkerkBVisyourpartnerinthedesignandproductionofengineeredrubberproducts.Ourfocusisonthemarketsofcivilengineering,offshoreoilandgas,dredging,sewage,buildingandindustry.TrelleborgRidderkerkBVisamemberoftheTrelleborggroup–aglobalindustrialgroupofferingleading-edgeexpertiseinpolymertechnologycombinedwithadvancedindustrial

know-howoffunctionalsolutionsandsystemstomeetourcustomers’requirements.TheGrouphasapproximately20,000employeesinsome45countries.TheGroup’sHeadquartersarelocatedinTrelleborg,Sweden.TrelleborgABwasfoundedin1905andtheTrelleborgsharehasbeenincludedintheStockholmExchangeA-listsince1964.

Trelleborg The Company

Photography:TonPoortvliet

TrelleborgRidderkerkBVhasunrivalledexpertiseinsealdesignandelastomertechnology,andistheworld’sleadingmanufacturerofelastomericgasketsforimmersedtunnels,cut&covertunnelsandboredtunnels.ForthesegmentalliningofboredtunnelsTrelleborgRidderkerkBVsuppliestunnelsegmentgaskets(TSGs)underthetrade

nameHeinke.Since1985,HeinkeTSGshavebeensuccessfullysuppliedtomajorsegmentallylinedtunnelprojectsaroundtheworld.TheTSGs,whicharelocatedinprecastgroovesencirclingthematingfacesofeachsegment,giveasecurerubber-to-rubberwaterproofsealassoonasthesegmentsareboltedtogether.

ThelowcompressionsetandstressrelaxationvaluesoftheelastomericcompoundusedintheirmanufactureenableelastomericTSGstorecoverunderreducedappliedloadtherebymaintainingapositivesealbetweensegmentsdespitegroundmovements.

TrelleborgRidderkerkBVmanufacturesarangeofHeinkeTSGsdesignedforprecastconcrete,steelandcastironsegmentsusedintheliningoftunnelsorshaftsandlargemainssewers.Allareprecisionengineeredtomeetthepreciserequirementsofindividualprojects.

Introduction

WhenspecifyingTSGsforsegmentedtunnelapplications,thereareanumberoffactorswhichneedtobetakenintoaccount.Itistheparticularcombinationoffactorsineachcasewhichdeterminestheeventualchoiceofgasket,whichinturnensuresanefficient,watertightsealovertheprojectedservicelifeofthetunnel.UponrequestwecanforwardaSpecificationGuidewhichliststhesefactors.

Onthebasisofinformationprovided,TrelleborgRidderkerkBVwillbeabletospecifythemostsuitableandeconomicalHeinkeTSGforaparticularapplication.Toeasetheselectionprocess,customersareinvitedtoconsultTrelleborgRidderkerkBVwhowillidentify,testanddemonstratetheappropriategasketforaparticularproject.

Segmentalliningsrequiregasketstoensureawatertightseal.Groundwaterisnormallyunderpressureandthechosengasketmustthereforebetestedforitsabilitytowithstandthepressuresinvolved.Thiscanbedonebyusingspeciallydesignedtestrings.Thesearebuilttosimulatetheworstconditionswhichcanbeexpected

duringconstructionandservicelifeofthetunnel.Hydrostaticpressureisbuiltupwithintherigtotherequiredtestpressureandmaintainedforaprolongedperiodoftime.Thetestpressureisalwayshigherthanthehighestworkingpressuretoensureamarginofsafety.

Design

Working and test pressures

Gapsanddisplacementsoccurbetweensegments,eitherasanallowanceforbuildingtolerancesortohelpsteerage,lineandlevelduringtheconstructionofthetunnel(seeFigA).ThepurposeoftheTSGistosealtotherequiredpressureatthemaximumexpectedgapanddisplacement.Asthesizeofthegapand/ordisplacementincreases,theabilityforagivenTSGtowithstandwaterpressuredecreases.

Itisimportanttoknowtheforcesrequiredtocompressthegasketasthesedictatetheforcerequiredtobringtwosegmentscompletelytogether.TrelleborgRidderkerkBVcanprovidethisinformationbyusingoneofitscompressiontestingfacilitieswhichplotstheforceagainstclosureforagivengasket,seeFigB.

Typicalloaddeflectioncurve

Gaps and displacements

Closure force

Crosssectionthroughsegmenttoshowtypicalgapanddisplacement

FigA

FigB

Thegrooveisrequiredtolocatethegasketinthesegmentandisofasizethatwhenthesegmentsareclosed,(ienogap),thevolumeofrubberishousedwithinthegroove.Ifthevolumeofrubberexceedsthegroovedimensions,itwillnotbepossibletoclosethesegmentsfully.

TrelleborgRidderkerkBV’sgasketsaredesignedsuchthattheelastomericmaterialcanbecompressedtofitwithinagivengroove.ThesizeofthegroovethereforehasamajoreffectonthechoiceofTSGanditssubsequentperformance.

TrelleborgRidderkerkBVwillrecommendandsupplyanadhesiveappropriateforbondingitsHeinkeTSGstoconcreteorcastironsegments.DatasheetsrelatingtotheadhesiveareavailableandTrelleborgRidderkerkBVcangivefurtheradviceonstorageandapplication.

Adhesives

Groove dimensions

TrelleborgRidderkerkBV’sEngineeringDepartmentspecializesinthedesignofhigh-performanceseals.WeapplyFEManalysisinthedesignprocesstodecreasedevelopmenttimesandincreasethequalityofthedesign.Alldesignsareverifiedbytestingthesealsforcompressionstiffnessandwater-tightness.

Inadditiontotunnelsegmentseals,TrelleborgRidderkerkBVmanufacturesandsuppliessealsforTunnelBoringMachines,suchasinflatableemergencyseals.

Tunnel boring machine

Engineering Max.stress

Min.stress

FigC:StressanalysisbyFEM

Trelleborg Ridderkerk BV VerlengdeKerkweg152985AZRidderkerkTheNetherlandsTel: +31180-495555Fax:+31180-433080ridderkerk@trelleborg.comwww.trelleborg.com/infrastructure

TrelleborgIzarraS.A.U.c/SanVicente,23E01440Izarra(Alava)SpainTel: +34945-437000Fax:+34945-437050izarra@trelleborg.comwww.trelleborg.com/infrastructure

SalesofficeTrelleborgIndustriO.O.O.8,Building4,Office72-ndRoschinskiyproezdRU-115419MoscowRussianFederationTel: +7495-2325579Fax:+7495-2322264moscow@trelleborg.comwww.trelleborg.com/infrastructurewww.trelleborg.ru

TrelleborgEdeBVKnuttelweg86718ZDEdeTheNetherlandsTel: +31318-617112Fax:+31318-615832ede@trelleborg.comwww.trelleborg.com/infrastructure

TrelleborgEngineeredSystemsQingdaoCo.LtdNanwanCommunityNorthJihongtanSub-DistrictChengyangDistrict266111ShandongChinaTel: +86532-89650700Fax:+86532-87907301qingdao@trelleborg.comwww.trelleborg.com/infrastructure

CentreofcompetenceforthisproductisTrelleborgRidderkerkBV.

Trelleborg Infrastructure consists of: