|
|
| WMATA: Dulles Corridor Metrorail Project Pictures 04 15 2012 (1151903) | |
 |
|
| Home > SubChat | |
[ Post a New Response | Return to the Index ]
|
| (1151903) | |
WMATA: Dulles Corridor Metrorail Project Pictures 04 15 2012 |
|
|
Posted by Sand Box John on Thu Apr 19 13:35:29 2012 WMATA: Dulles Corridor Metrorail Project Pictures 04 15 2012A great deal has been done sence I was out there last October. Lifting Gantry # 1 has completed its work between the Dulles Connector Road VA-267 and the Capitol Beltway 4 weeks ago. It was disassembled and removed form the last span built east of the Capitol Beltway VA I-495 2 weeks ago. All of the elevated is complete from the median of the Dulles Connector Road VA-267 to the Tysons 123 (Tysons Corner) station. Lifting gantry #2 is presently working the curve inside the eastbound Leesburg Pike VA-7 to eastbound Dulles Toll Road VA-267 interchange loop ramp. As I wright this there are a total of 16 spans (8 for inbound track N1 and 8 for outbound track N2) that need to be assembled to completed the elevated along Leesburg Pike to the median of the Dulles Access road west of Tysons Corner. Most if not all of the free standing prefabricated traction power substations and train control room have been delivered and set in place at the various location along the right of way. Some even have their step down transformers installed. The inclosures for the traction power substations, traction power tie breaker station and train control room are very utilitarian, They are nearly identical to traction power substations inclosures used on the Baltimore Central Light, only difference being the inclosures are painted tan. The traction power cabling from the traction power substations and tie breaker station to the elevateds will be secured in cable trays attached to the columns and elevated structures as apposed to conduit piping that is inside columns and elevated structures elsewhere on the existing portions of the railroad. Track work working west from the junction has gone as far as the Tysons East (McLean) Station. The Yard lead junction is in place along with the crossover near Magarity Road. Rail is being installed in the tunnel between the Tysons 123 (Tysons Corner) and the Tysons Central 7 (Greensboro) stations. Rail for that work is being staged on the track bed in the Tysons 123 (Tysons Corner) station. Track work out west has worked east to just west of Difficult Run. Only inbound track N1 in place. Both tracks in have been install through the Wiehle Avenue station to the west end of the pocket track. The Falls Church Yard lead cut and cover tunnel is a little over halfway completed. The invert slabs for the section of the tunnels that will be under the eastbound lanes of the Dulles Connector Road VA-267 to the south portal have been poured. The section of the tunnel under the median to the north portal is complete. Of the 5 stations Wiehle Avenue is the most complete, followed by McLean, Tysons Corner, Greensboro and Spring Hill. Ground work for the entrance pavilion at all of the station is underway. The columns that will support the pedestrian bridge adjacent to the entrance pavilion on the south sides Dolley Madison Boulevard are in place at the McLean station. The column on the north side of Dolley Madison Boulevard for pedestrian bridge at the Tysons Corner station is in place. The columns that will support the pedestrian bridge adjacent to the entrance pavilion on both side of the Dulles Access / Toll Road at Wiehle Avenue are in place. Mezzanine to platform escalators have been installed in the Wiehle Avenue station. Not sure but I think mezzanine to platform escalators have also been install in the McLean station. The construction access openings in the barrier walls along the Dulles Connector Road VA-267 have been closed, similarly all of the construction access openings along the Dulles Access Road west of Tysons Corner to Wiehle Avenue have also been closed. Some of the acoustical barrier have been installed on top of the barrier walls where called for The use of architectural precast concrete for facades, non bearing partitions, and for station ancillary buildings has and will be used in abundance. The emergency exit stairs inclosure at the stations will also be fabricated with precast concrete along with the landings and stairs. All of the architectural precast concrete elements have been installed at Wiehle Avenue, some have also been installed at McLean and Greensboro. Below are a selected few of the pictures I took, The remainder can be seen at DCMP 04-15-2012  K&N Junction train control room.  Falls Church Yard lead north portal.  Falls Church Yard lead cut and cover tunnel invert.  Falls Church Yard lead cut and cover tunnel south portal.  Falls Church Yard lead junction.  Anderson Road interlocking traction power cable trays.  McLean station.  East end of McLean station.  McLean station.  Emergency exit stairs West end of McLean station.  Tysons Center station.  West end Tysons 123 (Tysons Center) Station.  West end Tysons 123 (Tysons Center) Station.  Tysons 123 (Tysons Center) Station.  East end Tysons Central 7 (Greensboro) station.  Mezzanine Tysons Central 7 (Greensboro) station.  West ancillary building Tysons Central 7 (Greensboro) station.  Leesburg Pike VA-7 WestPark Drive / Gosnell Road intersection.  East end Tysons West (Spring Hill) station.  West end Tysons West (Spring Hill) station inbound track N1.  Lifting gantry #2 Working spans inside loop ramp from eastbound Leesburg Pike VA-7 to eastbound Dulles Toll Road VA-267.  Lifting gantry #2 Working spans inside loop ramp from eastbound Leesburg Pike VA-7 to eastbound Dulles Toll Road VA-267.  Straddle Bents over Dulles Access and Toll Road VA-267. Lifting gantry #2 Working spans inside loop ramp from eastbound Leesburg Pike VA-7 to eastbound Dulles Toll Road VA-267.  Beulah Road Traction power substation.  Wiiehle Avenue looking East inbound track N1.  Wiehle Avenue station north outbound track N2 side.  Mezzanine west end Wiehle Avenue station south inbound track N1 side.  Pocket tracks Wiehle Avenue station. John in the sand box of Maryland's eastern shore. |
|
|
| (1151917) | |
Re: WMATA: Dulles Corridor Metrorail Project Pictures 04 15 2012 |
|
|
Posted by Jackson Park B Train on Thu Apr 19 14:37:14 2012, in response to WMATA: Dulles Corridor Metrorail Project Pictures 04 15 2012, posted by Sand Box John on Thu Apr 19 13:35:29 2012. Thanks, John. Always interesting to see. |
|
|
| (1151942) | |
Re: WMATA: Dulles Corridor Metrorail Project Pictures 04 15 2012 |
|
|
Posted by RoldanTTLB on Thu Apr 19 16:22:21 2012, in response to WMATA: Dulles Corridor Metrorail Project Pictures 04 15 2012, posted by Sand Box John on Thu Apr 19 13:35:29 2012. I guess I have a really dumb question, and I'm sorry if it's been asked before, but why was this built out of the way in the median of 267 as opposed to adding WFC to the route and using the connections to the yard that were already there to just go right under Rt 7 (expensive additional tunneling under 7 until where it comes out on top of 7 now), or just putting the switches after WFC and going right on top of Rt 7 from there? I guess going the route they did allows for a station on the northern end of Tysons, but I don't get it. The route seems unnecessarily circuitous. |
|
|
(Sponsored) |
iPhone 6 (4.7 Inch) Premium PU Leather Wallet Case - Red w/ Floral Interior - by Notch-It |
|
| (1151984) | |
Re: WMATA: Dulles Corridor Metrorail Project Pictures 04 15 2012 |
|
|
Posted by orange blossom special on Thu Apr 19 18:51:41 2012, in response to WMATA: Dulles Corridor Metrorail Project Pictures 04 15 2012, posted by Sand Box John on Thu Apr 19 13:35:29 2012. I can't figure out if it's nice that it doesn't look like they're skimping at all, or if this looks like a really excessive build. |
|
|
| (1151998) | |
Re: WMATA: Dulles Corridor Metrorail Project Pictures 04 15 2012 |
|
|
Posted by Avid Reader on Thu Apr 19 19:50:49 2012, in response to Re: WMATA: Dulles Corridor Metrorail Project Pictures 04 15 2012, posted by RoldanTTLB on Thu Apr 19 16:22:21 2012. Think about the VACANT LAND that can be developed along a longer route. $$$$$$$$$$$$$$$$If you build it, they will come. |
|
|
| (1152043) | |
Re: WMATA: Dulles Corridor Metrorail Project Pictures 04 15 2012 |
|
|
Posted by Sand Box John on Thu Apr 19 22:46:26 2012, in response to Re: WMATA: Dulles Corridor Metrorail Project Pictures 04 15 2012, posted by RoldanTTLB on Thu Apr 19 16:22:21 2012. I guess I have a really dumb question, and I'm sorry if it's been asked before, but why was this built out of the way in the median of 267 as opposed to adding WFC to the route and using the connections to the yard that were already there to just go right under Rt 7 (expensive additional tunneling under 7 until where it comes out on top of 7 now), or just putting the switches after WFC and going right on top of Rt 7 from there? I guess going the route they did allows for a station on the northern end of Tysons, but I don't get it. The route seems unnecessarily circuitous.A similar schema was considered and rejected for the some reasons mentioned by Avid Reader in his post in response to you question. See alternative T7 below.  It was built out the Connector Road because when the K Route Orange line was built in the 1980s provisions were built to accommodate the junction and columns for the flyovers to run the route in the median of the Connector Road. As a matter of fact the provisions were completed before construction even began on the Connector Road.  The column stub in this picture taken in the 1980s now carries the inbound track N1 that flies over the westbound lanes of VA I-66 and and the tracks of the K Route Orange line. When the provisions were built it was envisioned that the branch would run directly to Dulles Airport, What made the whole project economically feasible was the idea of diverting the route through Tysons Corner.  John in the sand box of Maryland's eastern shore. |
|
|
| (1152044) | |
Re: WMATA: Dulles Corridor Metrorail Project Pictures 04 15 2012 |
|
|
Posted by Sand Box John on Thu Apr 19 22:52:43 2012, in response to Re: WMATA: Dulles Corridor Metrorail Project Pictures 04 15 2012, posted by Jackson Park B Train on Thu Apr 19 14:37:14 2012. Thanks, John. Always interesting to see.You are Welcome. My apologies for posting the 800 X 532 pictures, Normally I would have posted the 1024 X 681 pictures. If you want to see the 1024 X 681 pictures change the s800 in directory before the file name to s1024. John in the sand box of Maryland's eastern shore. |
|
|
| (1152050) | |
Re: WMATA: Dulles Corridor Metrorail Project Pictures 04 15 2012 |
|
|
Posted by Sand Box John on Fri Apr 20 00:00:57 2012, in response to Re: WMATA: Dulles Corridor Metrorail Project Pictures 04 15 2012, posted by orange blossom special on Thu Apr 19 18:51:41 2012. I can't figure out if it's nice that it doesn't look like they're skimping at all, or if this looks like a really excessive build.They skimped big time. All of the traction power substation will have a 6 MW output, WMATA would have desired 9 MW, they are built with provision to increase output to 9 MW at a later date. The train control and signaling system along route is built to accommodate 195 second headways instead of the typical 90 second headway. All of the stations will have roughly 1/3 fewer escalators compared to what was originality planed based on projected peak passenger flow through the stations. There will be 2 elevators between the various level for redundancy, prior to the opening of the G Route Blue line extension, station were built with a minimum of 1 elevator between the various levels. 2 pocket tracks were deleted and replaced with double crossover that would have allow greater operational flexibility. All of the cabling for communication, train control and 120V AC power will be installed in surface cable tray inclosures instead buried concrete ducts banks that is typical elsewhere on the railroad. The abundant use of architectural precast concrete in some of the elements looks to my eye to be an elegant improvement compared to massive poured in place structures of similar type found elsewhere on the railroad. John in the sand box of Maryland's eastern shore. |
|
|
| (1152166) | |
Re: WMATA: Dulles Corridor Metrorail Project Pictures 04 15 2012 |
|
|
Posted by RoldanTTLB on Fri Apr 20 15:40:51 2012, in response to Re: WMATA: Dulles Corridor Metrorail Project Pictures 04 15 2012, posted by Avid Reader on Thu Apr 19 19:50:49 2012. While I agree with the sentiment, there doesn't appear to be that much vacant land, and my experience with the fine (sic) citizens of Fairfax is not that they will be totally cool with their houses being bought up, torn down, and densified... In any event, I think between this and the original plan all taken into account, it was just going to be this way, and that's that. |
|
|
