ADKO Engineering

Structures

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Ferguson Slide Rock Shed, Caltrans/AECOM, CA

Caltrans proposed to construct a new rock shed (Culvert) on Highway 140 between Mariposa and El Portal at Ferguson slide. The new rock shed Culvert will provide a safe and convenient access through a rock fall area due to a land slide movement. ADKO Engineering is conducting a peer review report that provides improvements and address safe rock shed construction, benefits, and concerns to allow the roadway to remain accessible in the event of further rockfalls that may occur due to slide movement above the shed area and be mindful of the high-water elevation and close proximity of the Merced River embankment on the lower side.

Role to Client:

Majdi Kanaan is the main point of contact to the Caltran’s and AECOM and served as an expert for engineering consulting services relating to this massive slide that required special experience with tunnels and culverts and slide stability. He planned, directed, and managed the budget and maintenance.

Construction Value: $15 Million

ADKO Fee:     $25K | Duration: 2018

Client Reference:     Melad Hanna, PE

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SANTA FE AVE BRIDGE REPLACEMENT

ADKO Engineering provided Myers & Sons with falsework, trestle and shoring design for Santa Fe Bridge over Tuolumne River, a 540 feet arched cast-in-place three span arched structure that is supported on 12-foot diameter CIDH Piles and 7 foot columns.

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OC 405 Widening Project, Orange County, CA

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

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2017 Earthquake Repairs County of Napa

ADKO is providing PS&E for the following earthquake damaged sites:

  1. DAF 17 Old Sonoma Road Stone Culvert: The project consists of repairing the existing unreinforced mortared stone masonry culvert wingwall. The culvert wingwall repair will consist of drill and bond dowels into the damaged wingwalls and provide stream diversion. Extensive cracks (1” wide) in the stone arch culvert and cracks in pavement.
  2. DAF 19 Yountville Crossroad Bridge : The proposed project would include repairing the following items that were damaged during the 2014 Earthquake. The proposed project includes replacing the 2 ½”x9”x18” elastomeric bearing pads (total 5) at abutment 1 using hydraulic jacks.
    • Reconstruct 40 feet long by 39’-6” wide roadway approaches. The roadway approaches consist of 0.3” AC and 1.3’ aggregate base. All work will be done from at the roadway surface.
    • Replace the cracked 2.2”x2.5”x 4.5”shear key at abutment 1 south by removing the existing concrete and protecting the existing shear key rebars.  Dowels will be added to connect the replacement shear key to the abutment by jack hammering the spalled concrete.
    • No vegetation will be removed.  Minor trimming of vegetation, if any, is expected along the shear key repair area. Yountville Crossroad bridge consist of a six spans continuous PC/PS “I” Girder total 5 with reinforced concrete deck and reinforced concrete pier walls with reinforced cantilever seat-type abutments and monolithic wingwalls.
  3. DAF 20 Silverado Trail MPM 1.47: The project consists of repairing the existing unreinforced mortared stone masonry culvert that was damaged during the 2014 earthquake. The culvert repair will consistof drill and bond dowels into the damaged culvert and provide stream diversion. Cracks and missing mortar between stone, at West side of structure.
  4. DAF 22 Silverado Trail Talpin Road: The proposed project would include replacing the north barrier that was damaged during the 2014 Earthquake. The damages include barrier cracks, missing mortar between stone, and missing stones on stone barrier.
  5. DAF 23 Silverado Trail MPM 26.50: The proposed project would include replacing the north barrier that was damaged during the 2014 Earthquake. The damages include barrier cracks, missing mortar between stone, and missing stones on stone barrier.
  6. DAF 24 Silverado Trail MPM 0.16: The proposed project would include repairing the Cracks at both ends of wingwalls at North side of structure. the north barrier that was damaged during the 2014 Earthquake.
  7. DAF 25 Silverado Trail MPM 10.64: The project consists of repairing the existing unreinforced mortared stone masonry culvert wingwall. The culvert wingwall repair will consist of drill and bond dowels into the damaged wingwalls and provide stream diversion.

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Lewis Avenue Bridge

ADKO Engineering provided preliminary engineering and PS&E for the Lewis Avenue Bridge, Structural Steel Truss Tied Arch in Atascadero. This aesthetically pleasing Tubular Steel Pipe Arch Truss Bridge in the City of Atascadero over Atascadero Creek. The bridge is approximately 164 feet long and 64 feet wide. The bridge’s concrete deck and structural members will be supported by suspension cables. This type of structure was used due to hydrology clearance which kept the deck thickness to a minimum. The project included advance planning studies, bridge PS&E, geotechnical investigation, environmental, surveying and mapping, hydraulic/scour evaluation, traffic control, roadway modifications, stage construction, utility relocations, drainage, public relations, right-of-way appraisals and acquisitions, and coordination with Caltrans and local agencies.

Construction Value: $5.5 Million
ADKO Fee: $250,000
Client Reference: Steve Khan