I took 807 pictures 2.04 GB along the project area. There has been lot of work done sense I was last out there in mid January. Discovered a few new shooting location. The hills on the south side Dolly Madison Boulevard (Behind GEICO at Old Meadow Road and AFCO at Coleshire Drive) make good vantage points for taking pictures of the station and elevated between the Capitol Beltway and the Connector Road. Also the Median of Chain Bridge Road at International Drive is a good angle for taking pictures of the Tysons Centeral 123 (Tysons Corner) station.
The crew was working lifting gantry #1 east of Coleshire Drive Saturday. When I took pictures running west around 0915 they had positioned 2 of 9 segments, when I returned east around 1230 they had positioned 7 of 9 segments and were final positioning the 8th segment. My guess is they will position and cemented all 9 segment this weekend and will set the tensioning cables after the cement totally cures in a week them move the lifting gantry over and do track N2.
Got the chance to look down into the excavation at the west end of the bored tunnels. Track bed slab has been poured in the outbound track N2 tunnel. PVC water proofing was being placed in the tunnel above the track bed slab. The inbound track N1 tunnel only had the PVC water proofing in place for the track bed slab.
The contractor doing the track work appears to have setup two separate areas for welding stick rail into continuous welded rail as there is rail staged east of Hunter Hill Road and at two locations east of Old Chain Bridge Road. The welded rail sections at two of the staging location appear to be more the 2,500' long. The third staging location, on the abutment just south of Old Chain Bridge Road has rail sections that appear to be roughly 300' long.
Lay down area 11 (future location of the Dulles Yard) is being used as a "soil bank" The amount of dirt piled up there is mind boggling. Lay down area 10 (location of the casting plant) has several hundred segments in the yard both elevated span segments and span segments for in the stations.
Third rail and ground return conduits have been put in the ground at various locations along the project at interlocking and adjacent to where the traction power substation will be built.
There are several areas where the completed barriers walls in the median of both the Access Road and Connector Road have the chain link installed on top, all the fence lacks is the barbed wire on the top and the gates at the opening in the fence.
The Dulles Transit Partners contractor doing the demolition for the tie in between Haycock Road and Great Falls Street took advantage of WMATA's single tracking to do track work east of the East Falls Church station. The contractor was removing the wall and security fence at the earlier planned location for the junction under Haycock Road on the inbound track K1 side. The contractor has also removing several hundred feet of wall and security fence on the same side just west of Great Falls Street.
I am also convinced that all of the spans in the elevated structures through Tysons Corner will be of post-tension type construction.
Lifting gantry #1 (the one that is presently working just east of the Tysons East (McLean) station) will crawl over the Tysons McLean station and work west to where lifting gantry #3 is presently working over the Capitol Beltway. Lifting gantry #2 (the one that built the spans between the Capitol Beltway and the Tysons Centeral 123 (Tysons Corner) station will be dismantled and reassembled west of the Tysons Central 7 (Greensboro) station and work west to the Tysons West (Spring Hill) station. It may or may not be used to assemble the cantilevered spans over the intersection of Leesburg Pike and Gosnell Road / Westpark Drive. Not sure if the spans over the intersection of Leesburg Pike and Spring Hill Road will be of the cantilevered type like the spans over Gosnell Road / Westpark Drive as the piers are not up yet. I am not ready to speculate as to which lifting gantry will assemble the spans west of the Tysons West (Spring Hill) station.
Originally published 05 14 2011
Edited 05 03 2012
K and N Junction:
N Route Silver line flyover east of West Falls Church Station:
Fall Church Yard lead tunnel:
VA I-66 flyover to Dolly Madison Boulevard VA-123 west of Anderson Road:
Staged continuos welded rail:
Lifting Gantry #1:
|Post-tension lifting gantry support stand.||Post-tension lifting gantry support stand.||Post-tension lifting gantry support stand.|
The first group of pictures, of the north side of the gantry were taken in the morning shortly after 9:00 AM, the second from the south side were taken around 12:30 PM.
You will notice in the AM group that 2 of the 9 segments in span have been set to their final position. In the PM group 7 of the 9 segments have been set to their final position. As I was taking the second group of pictures the operators working hoist on the gantry were positioning the 8th segment to its final position.
It appears that all of the segments in a given span can be set in a single day.
Obviously the gantry can't be advanced to the position of the next span until the cement between the segment has cured and tensions cables have been installed, pulled and fastened in place.
Tysons East (McLean):
Capitol Beltway VA I-495 Dolly Madison Boulevard VA-123 interchange, post-tension lifting gantry #3:
Post-tension lifting Gantry #2 Tysons Centeral 123 (Tysons Corner)
Cut and over tunnels:
Tysons Central 7 (Greensboro):
Gosnell Road / Westpark Drive to Spring Hill Road
Tysons West (Spring Hill) station VA-267 VA-7 interchange:
VA-267 VA-7 interchange:
Dulles Access Road:
Post-tension segment casting plant:
Dulles Airport Yard Soil Bank
|Facility sign.||Yard gate.||Miscellaneous equipment inside yard gate.|
|Earth moving equipment.||Soil piles.||Dump truck driving out of yard after dropping load.|
|Soil piles.||Soil piles.||Soil piles.|
|Soil piles.||Soil piles.|
Pictures at picasaweb.google.com/cambronj 05 07 2011