DISCLAIMER: The use of this standard is governed by the "Texas Engineering Practice Act". No warranty of any DATE: kind is made by TxDOT for any purpose whatsoever. TxDOT assumes no responsibility for the conversion FILE: of this standard to other formats or for incorrect results or damages resulting from its use. Wall Height Anchorage Details Railing" Adjacent Without Traffic limits) (See notesfor Select Backfill (Min 12"x6") leveling pad Cast-in-place to Concrete. See "Coping panels Precast concrete DMS-6200 Type1. requirements of fabric meetingthe wrapped withfilter Underdrain shallbe (Min 12"x6") leveling pad Cast-in-place limits) (See notesfor Select Backfill Cement Stabilized panels Precast concrete when nounderdrainisrequired. 1' unstabilizedsandblanket SPECIAL DRAINAGEPROVISIONS (When cementstabilizedbackfillisused) Control Point Horizontal Vertical and UNDERDRAIN DETAIL TYPICAL SECTION (Wall atbottomofslope) Soil Foundation Control Point Horizontal Vertical and Foundation Soil 2'-0"+ 6" - ~ ~ in plans) (unless otherwiseshown 6" perforatedpipe(Ty6) Earth reinforcements 3" shown inplans) (unless otherwise Filter Mat'l(TyC) Soil Retained 2'-0"-+ 6" 2' Min Soil Retained on plans) (if required Underdrain 1' tointercept. underdrain back chimney andmove 1' verticalsand is requiredplace When underdrain on plans) (if required Underdrain Leveling pad MAP OFTEXAS EMBLEM 3'-0" Minimum ELEVATION 1 2 2 1 be finishedinacontrastingcolorasapprovedbytheEngineer. the panel,andshallreceiveasmoothfinish.Theinsetarea The mapofTexasshallbeinsetaminimumƒ"intotheface for directly,butshallbeincidentaltotheItem"RetainingWall". by theEngineer.Thecostofformingemblemswillnotbepaid bridge abutment.Theexactlocationofeachemblemshallbeapproved Map ofTexasemblemshallbeformedintoawallpanelnexttoeach Minimum embedmentconformingtovaluesgivenontheRW(MSE)DDstandard. FILE: C TxDOT retained fill,soil strength. 01-13: Wallembed, (WS)table, Criteria. 04-11: AddedTable&Corrosion STABILIZED EARTH MECHANICALLY RETAINING WALL rwstde01.dgn March 2010 REVISIONS SHEET 1OF2 DN: CONT DIST TxDOT RW(MSE) SECT CK: TxDOT COUNTY JOB DW: JGD Standard Division Bridge HIGHWAY SHEET NO. CK: MJG DISCLAIMER: The use of this standard is governed by the "Texas Engineering Practice Act". No warranty of any DATE: kind is made by TxDOT for any purpose whatsoever. TxDOT assumes no responsibility for the conversion FILE: of this standard to other formats or for incorrect results or damages resulting from its use. 5 3 4 6 anchorage system.Followmanufacturer'sdirectionsforinstallingtheepoxiedverticalbars. Cast verticalbarsintothetopofpanels.Atcontractor'soptionmaybeembedded4"with a TypeIIIClacCepoxy Soil designparametermustbebasedonlongtermsoilstrength.DesignparameterslistedtheRW(MSE)DD standard. copings. Detailsshallincludecopingreinforcement.Concreteflume(ifrequired)bepaidforseparately fromItem423. Precast copingshallbeanchoredtopreventrotationordisplacement.Usethesedetailsdevelopcustom anchorageforprecast BS & Type AS, 1'-2" DS 1'-0" Max Max 6" Min Unit Weight 125 PCF 105 PCF level-up Top ofCIP Point (Typ) Control Horizontal Vertical and 20" Min / 27" Max Inernal Stability 9" Edge ofPrecastMSEPanel Min SELECT BACKFILLUNITWEIGHT Rupture Pullout 3 •" Min (Excluding Concrete Pavement) COPING ANCHORAGE DETAILS WITHOUTTRAFFIC RAILING in conflict when adjacentpanelis Terminate highsidebars ADJACENT TOCONCRETE ~ 1'-0" Concrete Riprap/Flume 2" 2" (Shop or field trim to maximum heght14". strip minimumheight1", Cast-in-place level-up Sliding, Overturning,Eccentricity ~ (#4) at12"Max the required projection) 4" overlapwithtopofpanel. truncated toprovideaminimum This areaofcopingmaybe shall extendtobottom 4' MinSelectBackfill of ConcRiprap/Flume. Equal Spaceat1'-6"Max 1 External Stability ' - 2" 0 Construction Joint Permissible " ELEVATION Bearing where thebuildupislessthan6" Terminate thesebarsatthelocation ~ MSE Panel Precast Edge of Edge ofPrecastMSEPanel bars orlapsof1'-5"length an adjacentpanels,providecontinuous Where thesebarsarenotobstructedby Point (Typ) Control Horizontal Vertical and 20" Min 1'-0" 27" Max Provide Grade60(#4)Reinforcement Min 9" Embed Min LEVEL UPDETAIL 3 •" Min 1" Min ADJACENT TOSOIL ~ maximum heght14". strip minimumheight1", Cast-in-place level-up 1'-0" Max Joint Construction Permissible 2" 1'-6" Min 6" Min 8" as shown (#4) Spaced 5 Concrete Buildup Class "C"CIP 12" Max (#4) at (Match Panels) 3 "T" =5"Min 2" MSE Panel Precast anchor slab. Cast-in-place 6" Min 1'-0" T/2 Min SECTION Embed ~ ~ GENERAL NOTES: JOINT SEALER: PRECAST COPINGS: CORROSION CRITERIA: STABILITY CRITERIA: applicable standards. layout, standardRW(MSE)DD andother conjunction withtheretainingwall Thesedetailsaretobeusedin subsidiary totheItem"RetainingWall". Copingandanchorslabsareconsidered AllreinforcingsteelmustbeGrade60. concrete Class"H",Unreinforced"A". ReinforcedconcretemustbeClass"C",Precast to themandasapprovedbytheEngineer. panels whichdohavesupportingSoilreinforcements attached without anysoilreinforcementsconnectedtothemunless theyareconnectedwithgalvanizedhardwaretoadjacent any alterationsmadetothesoilreinforcementsormodifications totheirnormalplacement.Donotusepanels reinforcement equivalenttothestateddesignlength forthesectionofwall.Providecalculationsthatjustify angles greaterthan10degreesadjustthelengthof earth reinforcementtoprovideacosinelengthofthe earth reinforcementsnoadjustmentinlengthisneeded forskewanglesbetween1and10degrees.For same earthreinforcementcoverageasthatrequired in theabsenceofobstruction.Forskewed(rotated) normal locations,providedetailsandcalculations that establishsupportfortheaffectedpanels.Furnish Whenobstructions(inlets,drilledshafts,piling, etc.) preventplacementofsoilreinforcementsintheir "Joint SealantsandFillers",usingClass4jointsealant. infiltration ofwaterintotheretainingwallbackfill.SealingshallbeinaccordancewithDMS-6310 other verticalstepsalongthetopofwall.Thejointsbetweenallcopingsegmentsshallbesealedtoprevent Concretecopingshallbeprovidedalongthetopofwall,atverticalstepsbridgebackwalls,and at chamfered panelswillbeallowedforanglechangesof30degreesorless. Aone-piececornerpanelshallbeprovidedforwallanglechangesofgreaterthan30degrees.Butting of opening isbetween…"andƒ". be suchthat1)thefilterfabricand/orpadmaterialsarenotexposedatwallfaceand2)design Anopenjointshallbeprovidedaroundtheperimeterofconcretepanels.Theconfiguration shall offset horizontaljoints. height ofanypanelshallbe7'-6".Minimumthickness5".Panelsarrangedtoprovide Top andbottompanelsmayexceedtheselimitationsasnecessarytoachieverequiredwallgrades.Maximum Standardprecastconcretepanelsshallhaveamaximumheightof6',andsurfacearea50 sqft. reinforcement lengthsshallbesteppedinincrementsnofinerthan12". shall haveauniquetransversebarspacing,differingfromotherconfigurationsbyminimumof3".Earth Amaximumoffourwiremeshconfigurations(wiresizes)willbeallowedonaproject.Eachconfiguration larger wire. in anearthreinforcementmesh,thesmallerwireshallhaveatleast50%ofcrosssectionalarea the MinimumwiresizeforearthreinforcementsshallbeW7.0.Ifdifferentlongitudinalandcrosswiresare used Thelowestlevelofearthreinforcementsshallbenomorethan2.0'abovethetoplevelingpad. Theuppermostearthreinforcementsshallbenomorethan3.0'belowthetopofwall. whichever islower,tothetopofpanels. backfill shallextendverticallyfromthetopoflevelingpador4"belowlowestearthreinforcement, horizontally fromthebackofpanelstoaminimum2'beyondendearthreinforcements.The select Theselectbackfillspecifiedforusewithinthemechanicallystabilizedearthvolumeshallextend on walllayoutsandotherplaninformation. Sectionandelevationshownisforinformationalpurposesonly.Specificgeometrytobedetermined based drainage andpreventinfiltrationintotheretainingwallbackfill. pavement surface,orasdirectedbytheEngineer.Thepurposeofjointsealingistocontainsurface Fillers", jointsealingmaterial,Class4.Themustbesealed3"belowand6"abovetheadjoining ThejointsbetweencopingsegmentsmustbesealedinaccordancewiththeDMS-6310"JointSealant'sand applies onlytocopingwithoutrailing. favorable toshortercopingsections,lengthsmaybeusedpendingapprovalbytheEngineer.This lengths (typical).Tooptimizecopingatradiuses,endofrunsorotherwallgeometricconditions Wallsupplieristomaximizelengthsofprecastcoping.Precastcopingbeprovidedin10'minimum 75 years.Pulloutcalculationsmaybebasedonnon-corrodedsection. Stresscalculations(rupture)shallbedoneonthecalculatedearthreinforcementsectionremainingafter AASHTO corrosionrates. Theearthreinforcementelementsshallbedesignedtohaveaminimumdesignlifeof75years,usingcurrent each level.Pulloutresistanceshallbedeterminedfromtestdataevaluatedatƒinchstrain. Thefactorofsafetyagainstpullouttheearthreinforcementsshallbegreaterthanorequalto1.5at Thebasepressureresultantshallfallwithinthemiddlethirdofretainingwall. Factorofsafetyinoverturningshallbegreaterthanorequalto2.0. Factorofsafetyinslidingalongthebasestructureshallbegreaterthanorequalto1.5. Stabilitycriteriaappliestobothdryanddrawdownanalysis. TheminimumlengthofearthreinforcementsareasshownontheRW(MSE)DDstandard. StressinsteelandconcreteshallbeaccordancewithcurrentAASHTOStandardInterimSpecifications. plans: Designofretainingwallsshallbebasedonthefollowingdesignparametersunlessstatedelsewherein DESIGN PARAMETERS: Cement Stabilized Select Backfill Foundation Soil Select Backfill Retained Soil Unit Weight=SeeTable Unit Weight=125pcf Unit Weight=125pcf / / / / O =45C0psf O =34C0psf O =C0psf O =C0psf 4 4 6 FILE: C TxDOT retained fill,soil strength. 01-13: Wallembed, (WS)table, Criteria. 04-11: AddedTable&Corrosion MECHANICALLY STABILIZED EARTH RETAINING WALL rwstde01.dgn March 2010 REVISIONS SHEET 2OF DN: CONT DIST TxDOT RW(MSE) SECT CK: TxDOT COUNTY JOB DW: JGD Standard Division Bridge HIGHWAY SHEET NO. CK: MJG .