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Cal Maritime Vallejo
A Soil-Mec SR 30 was used to drill the retaining wall piles, and a long reach excavator along with a smaller excavator on the slope was used to drill the stairway piles. WCD installed 83 each 24” x 16’ at the retaining wall and 36 each 18” x 10’ piles at the stairs into Sandstone Bedrock.
The work consisted of mass excavation, install 28 each W16 x 89 x 35’ steel beams in 30” drilled shafts with structural and lean concrete, 26 each 192 Kip Tieback Anchors x 75’ long with 10’ – 14’ high shotcrete lagging to retain the slope.
San Lorenzo Creek Stabilization
The work consisted of mass excavation, install 32 each W16 x 89 x 35’ steel beams in 30” drilled shafts with structural and lean concrete, along with 10 each 30” x 20’ secant piles, 29 each 240 Kip Tieback Anchors x 70’ long with 10’ – 18’ high pressure treated wood lagging to retain the slope.
Pile drilling, hole dewatering as required, casing top 10’ max if required, baker tank if required, providing setting rebar cages, providing, and placing pile concrete, removal of drill spoils, USA location
and pot holing utilities at 3 each locations.
To retrofit this historically significant bridge, the State called in West Coast Drilling to thread 30″ & 36″ CIDH piles through the existing foundation and into bedrock. The piling work involved coring through 21′ of existing concrete, casing through native boulders & cobbles, and drilling a rock socket below. The piles required 50′ of permanent casing, which was extended to 60′ to insure shaft stability.