The Zeitim Interchange is located
at the eastern entrance to Jerusalem on the slope of Mount Scopus.
The interchange joins National Route #1, Mount Scopus Tunnels
access road and local entrances to adjacent villages.
The pre-stressed 2-span concrete bridge carries the entrance road
to Mount Scopus Tunnels above National Road #1. The bridge is
80m long and 32.5m wide with skew supports calling for a cast
in-situ voided slab solution for the deck. The sub-structure was
made of cast-in-situ concrete columns and abutments supported
by cast-in-situ concrete precaution drilled piles.
The first cut-and-cover underpass “A” is 272m long
and 12m wide with 600mm abutment walls made from cast-in drilled
piles connected by cast-in-situ concrete beam on top. The superstructure
is made of precast "Inverted-Tee" pre-tensioned girders
and cast-in-situ concrete on top.
The second underpass “B” of 59,2m length and 14.1m
width was constructed using a “top-down” approach
where after completion of the abutment wall pile drilling the
superstructure slab was post-tensioned and sub-sequent excavation
exposed the pile walls.