CE165 Concrete ConstructionPresentationUnderhill Parking Facility and Playing FieldBy:Joanna Chang Jian Jun Huang Ngar Nuen LamUnder the supervision of: Prof. Paulo MonteiroDepartment of Civil and Environmental Engineering,University of California, BerkeleyApril 19, 2007Outline1. Project Introduction2. Structural Description3. Selection of Materials for Concrete4. Concrete Processing5. Construction6. Major Challenges7. ConclusionProject Introduction Underhill Parking Facility and Playing Field University of California, Berkeley Location: Intersection of Channing Way and College AvenueProject IntroductionProject Introduction Replacement Parking Structure and Street Level Recreation Field 4 levels total (2 below grade, 1 partially above grade, and 1 above grade) 1000 parking spaces on four levels for the U.C. Berkeley campus community and open space for recreation adjacent to student residenceStructural Description Pre-cast structure with cast-in-place slabs and walls Beam-Girder Gravity Load Resisting System Shear Wall Lateral Load Resisting System Post-Tension slabs using stressed tensionsStructural Description Columns and Girders: Pre-castStructural Description Walls and Shear Walls: Cast-in-placeand shotcreteStructural Description Slabs: cast-in-place, post-tensionSelection of MaterialsReady-Mix Concrete Materials Type II 15% Fly Ash Type F Canada and CA Aggregates NRWR, SP, AEA $100 per cubic yardSelection of MaterialsCuring Compound Sodium SilicateShotcrete Aggregates from local sourcesPrefabricated Lathrop, CACharacteristic Strengths PT Decks - 5000 psi Field Deck & SOG - 4000 psi General Use - 4000 psi Shotcrete - 4000 psi Reinforcing barsConcrete Processing In general, sequence of work is weekly basedConcrete Processing Batching and Mixing Placing - pumping Compacting Finishing Curing Formwork RemovalFinishing Floating Brooming Steel trowel finishConstruction Post-Tensioning Shotcrete Temporary Shoring Utilities Installation Drainage systemMajor Challenges/Issues Weather conditions Rain Delay of concrete pouring Overall Project Delay Ground water Water table is ~10 feet below grade Solution: Waterproof drainage materialConclusion More understanding on current practices of concrete construction Communication with different personnel in the project Awareness of ongoing construction projects in the communityAcknowledgements UC Berkeley Project Manager: Dennis Town, PM Engineer: Greg Horne, PE Professor Monteiro Professor Astaneh-Asl EBMUD – Donny All construction workers at site!!Any Questions?Thank
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