| I-5/SR502 Interchange, Vancouver,
WA
Constructing 3 meter diameter Shaft at Pier 3:
Malcolm Drilling furnished and installed 9’ diameter
permanent steel casing at six (6) shaft locations with
Leffer 3m oscillator equipment on this project: four
pier locations were installed from existing grade, and
two were installed from a sheetpile supported workbench
and finger piers constructed over the edge of the work
bench. Permanent steel casing segments were welded together
vertically over the shaft location with the deepest
casing installed at a length of 176’. A Liebherr 883
dig crane excavated the shafts utilizing a 3M spherical
grab, dumping shaft spoils into waiting dump trucks.
A Liebherr 873 was used as the support crane for placing
and supporting the reinforcing cage, and other associated
operations.
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