The first pair of post tension spans are done. The outbound track N2 span of the second pair is done, the segments for the inbound track N1 are hanging from the gantry.
The column between tracks K1 and K3 east of the West Falls Church station now has a bearing cap on it and is ready for span beams to be set. Most of the adjacent column to be built on the 1977 piles haven't come out of the ground yet.
5 of the 10 precast concrete beams (3 inbound track N1, 2 outbound track N2) have been set on the columns on the north end of the flyover in the media of the Dulles Connector Road VA-267. Not sure how many precast concrete beams will be used on south end in the media of VA-66.
All of the pile driving for elevated columns is done east of the Tyson Central 123 (Tysons Corner) station. Most of the columns are done between the Dulles Connector Road VA-267 and the Tyson East (McLean) station and at the crossing of the Capitol Beltway VA I-495.
As of 06 21 2010 more then 1,000' of the roughly 1,700' long outbound track N2 bored tunnel has been excavated, more the 750' of the inbound track N1 tunnel has been excavated.
About 3/4 of the first segment of the outbound track N2 cut and cover tunnel is done, roughly 1/4 of the inbound track N1 tunnel is done.
Piles along the eastbound side of the Tysons Central 7 (Greensboro) station in the ditch have been driven.
The segment of shifted eastbound lanes on Leesburg Pike VA-7 between Dolly Madison Boulevard VA-123 and just beyond halfway from Gosnell Road to Spring Hill Road is permanent. The right edge has a curbs and gutters. Behind the gutter is a strip of fresh sod and a 6' wide concrete side walk. This is the first part of the road realignment of Leesburg Pike VA-7 to be completed prior to beginning of major construction of the rail line.
Originally published 06-26-2010
Edited 05 02 2012
N Route Silver line flyover east of West Falls Church Station:
Post-tension lifting gantry #1:
Column construction in VA-267 Dulles Connector Road VA-123 Dolly Madison Boulevard interchange:
Column construction along Dolly Madison Boulevard, Tyson East (McLean) station:
Column construction in VA I-495 Capitol Beltway VA-123 Dolly Madison Boulevard interchange:
|Columns between WestPark Drive and VA-495 Capitol Beltway.||Columns between WestPark Drive and VA-495 Capitol Beltway.||Columns between WestPark Drive and VA-495 Capitol Beltway.|
Column construction east of Tysons Central 123 (Tysons Corner) station.
|Columns east emd of Tysons Central 123 (Tysons Corner) station.||Columns east emd of Tysons Central 123 (Tysons Corner) station.|
Cut and cover tunnel trenches in VA-7 Leesburg Pike VA-123 Dolly Madison Boulevard interchange:
Tysons Central 7 (Greesboro) station:
Pictures at picasaweb.google.com/cambronj 06 23 2010