ASPIRE Summer 08 - Aspire - The Concrete Bridge Magazine

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The stay cables consist of 0.6-in.-diameter greased and sheathed strandswithin an ungrouted HDPE casing. Nonlinearviscous dampers are connected toall cables at deck level to minimize cablevibrations from wind and rain.The bridge provides an undividedroadway consisting of four 12-ft-widelanes. Also included are two 4-ft-wideshoulders and a 6-ft-wide sidewalk,creating a total width of approximately74 ft. The roadway alignment is on atangent for the bridge’s full length,except for a J-hook on the Ohio sideof the river. This 180-degree turn in theroadway, beginning approximately 150ft inland from the river bank, is madenecessary by the steep rocky hillside thatparallels the Ohio shoreline.The new bridge takesshape upstream from theexisting bridge, which remains open to traffic.The navigational channel of the river, onthe Ohio side, provides a minimum of645 ft of horizontal clearance and 55 ftof vertical clearance, which is consistentwith the clearances provided at otherOhio River bridges, Jeakle says.High Performance ConcreteThe cast-in-place concrete specificationfor the bridge’s superstructure called fora concrete mixture with a compressivestrength of 6000 psi and a lowpermeability of 1000 coulombs. The mixcontains fly ash and a high-range waterreducingadmixture. The 11-in.-thickdeck will be permanently protected byan overlay consisting of a silica fumeconcrete that meets the standard ODOTspecifications.When completed this fall, the bridgewill have white stay cables and all whiteconcrete surfaces, except the roadwaydeck, which will be painted with an offwhiteepoxy urethane.The bridge represents a spirit ofcooperation between governmentalbodies, which frequently can have theirown agendas, says Jeakle. “Probablythe biggest challenge in completingthis project was whether the two statescould come to a consensus on a designconcept agreeable to both. Whenit opens to traffic this fall, I believethat that question will be answeredpositively.”For more information on this or otherprojects, visit www.aspirebridge.org.BRIDGE POST-TENSIONING SYSTEMS:Innovative, Proven and Durable.SYSTEMS• BONDED MULTISTRAND• VSLAB+ ® BONDED SLABS• STAY CABLES• VIBRATION DAMPINGSERVICES• SYSTEM INSTALLATION• DESIGN SUPPORT• HEAVY LIFTING• REPAIR & STRENGTHENING• EQUIPMENT RENTALOwners and design teams rely on VSL toprovide innovative technology and provensystems to maximize the durability oftransportation structures. A world leader inpost-tensioning, VSL has evolved into a multidisciplinedbridge partner capable of providingcontractors and engineers with design support,as well as construction systems and servicesfor precast segmental, cast-in-place and staycable bridges.www.vsl.net • 888.489.268738 | ASPIRE, Summer 2008
Precast Span-by-SpanPrecast Balanced CantileverCast-in-Place Balanced CantileverIncremental Launchingpost-tensioningfor segmentalbridgesproviding– Tendons from4 to 37-0.6" strands– Form Travelers– Equipment– Installation Labor– Value EngineeringSMART HIGHWAY BRIDGEownercontractorpost-tensioningand form travelersVirginia DOTPCL Civil ConstructorsAVAR Construction Systems, Inc.Construction Systems, Inc.504-F Vandell WayCampbell, CA 95008408.370.2100info@avarconstruction.com
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ASPIRE Summer 08 - Aspire - The Concrete Bridge Magazine

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