| 5th and Yesler
5th and Yesler was awarded to MDCI through the competitive
bid process in the spring of 2006. The excavation, located
in the area of Seattle known as Goat Hill, was constructed
through a series of benches due to the steep slopes
which surrounded the site. Through close coordination
with the General Contractor and Earthwork Subcontractors,
the shoring and excavation was constructed without incident
and 3 weeks ahead of schedule despite encountering hazardous
soils and various other site logistical challenges.
In all, MDCI installed a total of 125 soldier piles
with an average depth of 57’ at an average rate of 10
piles per day. The deeper 80' piles were drilled using
MDCI's Soil Mec 825 which is capable of drilling up
to 140' in its standard set (maximum of 250’ with longer
bars). The shorter piles were installed using the Watson
2500. The flexible design of the 2500 allows for drilling
in rough terrain conditions as well as steeper slopes.
All of the 500 tiebacks were installed using the Davey
725 drill machine which showed no difficulty installing
the tiebacks which had lengths up to 100’ in depth.
|
