ADKO provided the independent design check services for the replacement of the existing eight overcrossings in Orange County. Our tasks involve identifying potential savings for the OC40 JV that totaled more than 50 Million. Project sites include:
— Talbert Ave OC Replacement is the largest structure on I-405 (434’ long) with 22 lanes totaling approximately 114’-0” in width. This two continuous spans CIP/PS box girder bridge is supported on a five-column and 24” driven steel pipe piles. A type selection report was provided on this structure. The challenges include the seismic analysis for liquefaction and lateral spreading.
— Slater Ave OC Replacement spans I-405 is 332’ long and 78’ wide structure. This two continuous spans CIP/PS box girder bridge is supported on a four-columns and 24” driven steel pipe piles. The challenges include the seismic analysis for liquefaction and lateral spreading.
— Harbor Blvd UC Undercrossing (Widening) spans I-405 is 203’ long and varies from 7’ to 19’ in width. This four continuous spans CIP/PS box girder bridge is supported on single column bents and class 200 piles. The challenges included retrofitting the existing 200’ wide structure. and retrofitting the existing structure.
— Santa Ana River Bridge (Widening) is 440’ long CA-I36 PC/PS Girder Bridge on both sides totaling 100’ variable width structure. The bridge is supported on pier walls and bin type wall abutments. The challenges include the seismic analysis for liquefaction and lateral spreading and retrofitting the existing structure.
— Heil Ave Pedestrian OC is comprised of three CIP/PS Box Girder (333’-6” long) spanning I-405 14 lanes and four level on-ramps at each end (1000’ long). The superstructure is supported on single 5’ columns and 96” CIDH Shafts. The challenges include the seismic analysis for liquefaction and lateral spreading.
Construction Value: $50 Million
ADKO Fee: $200,000
Client Reference: OC405 JV Partners, Mr. Azzam Saad