Ron Ron Ron Posted April 13 Share Posted April 13 (edited) Calvert HS2 and E-W Rail, inc. the HS2 Infrastructure depot. A map of the affected area, showing the path of the diverted road.... https://assets.publishing.service.gov.uk/media/5a7eb9c9ed915d74e33f2084/C222-ATK-CV-DPL-020-000016_0.pdf (You should be able to zoom in, for a detailed look) . Edited April 13 by Ron Ron Ron 1 1 2 Link to comment Share on other sites More sharing options...
RMweb Premium jamie92208 Posted April 14 RMweb Premium Share Posted April 14 A new contributor, certainly to me, called Wandering Northerner, has uploaded a new video of the Thame Valley viaduct. It is certainly coming in with the beams in on some 22 spans, Deckingbeing cast on at least ten spand a d I thi k 13 spans still to go. Most of the abutments and pillars are done but it looks as if two sets are still to be started. Jamie 6 1 Link to comment Share on other sites More sharing options...
RMweb Premium Davexoc Posted April 14 RMweb Premium Share Posted April 14 19 hours ago, Ron Ron Ron said: It's not a rail bridge to carry the track. That's the new road bridge which will carry the diverted north-south road (I don't know the name or B route number) over HS2. The bridge is wide as along with the HS2 mainline, it will also accommodate the tracks leading into and out of the depot to/from the north. You can see that bridge in this recent video. It's briefly visible in the opening seconds, but skip to 6min 44secs and then to 7min 57secs, for a closer look. The road has already been diverted along a temporary route, linking in to the new bridge carrying the road under E-W Rail. . I was thinking it was to get the infrastructure trains over HS2 to the other side, but did think the angle looked wrong. The road by the way isn't even classified as a 'B' road, its just the route from Buckingham to Kingham via Gawcott and Edgcott, so that is quite a large structure. Which makes me wonder if there is a plan to upgrade this route between Buckingham and Aylesbury. Alot of house building going on at both ends.... 1 2 Link to comment Share on other sites More sharing options...
RMweb Premium jamie92208 Posted April 17 RMweb Premium Share Posted April 17 Wander g Northerner has posted another video progress on the two viaducts in the Wendover area. Wendover Dean and Small Dean. It's welshot but could do with a couple of subtitles when he jumps from one viaduct to the other. However it shows real progress. l Wendover Dean looks as if it is nearly ready for the next big push to launch over the next four piers. Albut the final abutment seem tbeonearly complete. Jamie 8 1 Link to comment Share on other sites More sharing options...
RMweb Premium jamie92208 Posted April 18 RMweb Premium Share Posted April 18 An interesting video from HS2 about the crossing of the A43 near Brackley. Jamie 3 3 Link to comment Share on other sites More sharing options...
RMweb Premium corneliuslundie Posted April 18 RMweb Premium Share Posted April 18 I assume the soil must be pretty unstable (or is it something else?), to need such deep piling. Jonathan Link to comment Share on other sites More sharing options...
Grovenor Posted April 18 Share Posted April 18 Well, the railway is going underneath so they have to get well below track level to create foundations for the piers and/or abutments. But see also comments earlier in this topic relating to the way the design life warranties that contractors have had to provide have pushed up the design standards and hence the costs. 1 1 1 Link to comment Share on other sites More sharing options...
Ron Ron Ron Posted April 18 Share Posted April 18 Colne Valley Viaduct. Crossing the Grand Union Canal. (Note: the temporary pier will be removed at some point) . 7 1 Link to comment Share on other sites More sharing options...
ess1uk Posted April 19 Share Posted April 19 13 hours ago, jamie92208 said: An interesting video from HS2 about the crossing of the A43 near Brackley. Jamie I wondered when something would happen there 1 Link to comment Share on other sites More sharing options...
Ron Ron Ron Posted April 20 Share Posted April 20 (edited) Engineers ave been dismantling and removing TBM "Lydia", that was used to bore the Old Oak Common to Atlas Road logistics tunnel. "Lydia" is a smaller TBM than those being used to bore the railway tunnels. Note the size of the workers, next to this "smaller" TBM..... Edited April 20 by Ron Ron Ron 4 2 Link to comment Share on other sites More sharing options...
RMweb Premium jamie92208 Posted April 22 RMweb Premium Share Posted April 22 4 of the 5 TBM;s have phoned home today. Sushilla on Northolt north has now completed 60% of her dive and is going at over 13m per day. Caroline is a bit slower and is at 55% on 12m per day. Emily on Northolt south is now at 205m and is starting to get speed up. Anne, her partner in crime is at 53m so her tail will still be mainly in the open. Mary Anne at Bromford seems to be having a go slow at just 4m in the last 15 days and is at 1980. Jamie 7 Link to comment Share on other sites More sharing options...
Ron Ron Ron Posted April 23 Share Posted April 23 An article explaining some of the ground condition difficulties encountered by TBM's "Sushila" and "Caroline", while tunnelling under the Ruislip area. (remember the incidents with sludge bubbling up through boreholes, last year?) https://www.geplus.co.uk/news/hs2-tbm-quartet-tackles-differing-geology-on-twin-bore-tunnel-under-london-22-04-2024/ . 6 Link to comment Share on other sites More sharing options...
Ron Ron Ron Posted April 23 Share Posted April 23 "HS2 moves 1,100 tonne viaduct in weekend operation" https://mediacentre.hs2.org.uk/news/in-pictures-and-video-hs2-moves-1-100-tonne-viaduct-in-weekend-operation . 8 1 Link to comment Share on other sites More sharing options...
RMweb Gold martin_wynne Posted April 24 RMweb Gold Share Posted April 24 5 2 Link to comment Share on other sites More sharing options...
RMweb Premium jamie92208 Posted April 25 RMweb Premium Share Posted April 25 Simon C has done a time lapse video showing the process of erecting past of the next section of the Colne Valley Viaduct. I rather liked it. Jamie 3 1 Link to comment Share on other sites More sharing options...
RMweb Premium jamie92208 Posted April 25 RMweb Premium Share Posted April 25 Attached to the photos that @Ron Ron Ron uploaded of the viaduct slide over the M42/M6 link road was a detailed map of the whole delta junction site which is huge. The file was rather large as well but I have managed to resize it and convert it to a jpg. I hadn't realised just how many separate structures are involved and have managed to get myself quite confused watching videos of the construction. I hope that this helps. Jamie The 7 1 2 Link to comment Share on other sites More sharing options...
Ron Ron Ron Posted April 25 Share Posted April 25 Another infrastructure tunnel at Old Oak Common has been completed. This is a 120 metre long, small bore tunnel under the Grand Union canal, designed to carry electrical power services to the eastern end of the OOC station box,. Initially this tunnel will carry the power supply for the 2 TBM's, ordered for the construction of the Euston tunnels. Once tunnelling to Euston is completed, this tunnel will then provide the power supply for the Euston tunnels from OOC to Euston. https://barhale.co.uk/news/uk-power-networks-and-barhale-build-tunnel-to-power-hs2-construction-to-euston/ . 2 3 Link to comment Share on other sites More sharing options...
Ron Ron Ron Posted April 25 Share Posted April 25 First completed sections of HS2’s Curzon Street Station viaduct, revealed. . 5 1 Link to comment Share on other sites More sharing options...
RMweb Gold rodent279 Posted April 26 RMweb Gold Share Posted April 26 On 22/04/2024 at 17:12, jamie92208 said: 4 of the 5 TBM;s have phoned home today. Sushilla on Northolt north has now completed 60% of her dive and is going at over 13m per day. Caroline is a bit slower and is at 55% on 12m per day. Emily on Northolt south is now at 205m and is starting to get speed up. Anne, her partner in crime is at 53m so her tail will still be mainly in the open. Mary Anne at Bromford seems to be having a go slow at just 4m in the last 15 days and is at 1980. Jamie Interesting reading these reports of tunnelling progress in the modern era. Looking at a book on the GWR Badminton line, which was built between 1897 & 1904 from Wootton Bassett to Stoke Gifford, the rate of progress was reported in Sodbury tunnel to be 5 yds per week, and in the shorter Alderton tunnel at 27 yds per month. 2 1 1 Link to comment Share on other sites More sharing options...
RMweb Premium jamie92208 Posted April 26 RMweb Premium Share Posted April 26 2 hours ago, rodent279 said: Interesting reading these reports of tunnelling progress in the modern era. Looking at a book on the GWR Badminton line, which was built between 1897 & 1904 from Wootton Bassett to Stoke Gifford, the rate of progress was reported in Sodbury tunnel to be 5 yds per week, and in the shorter Alderton tunnel at 27 yds per month. At times, the two machines on the Chiltern tunnels were getting 30 metres per day,each, double their design speed. There is some fantastic engineering going on. Jamie 3 1 Link to comment Share on other sites More sharing options...
RMweb Gold big jim Posted April 26 RMweb Gold Share Posted April 26 16 minutes ago, jamie92208 said: At times, the two machines on the Chiltern tunnels were getting 30 metres per day,each, double their design speed anything can double its design speed, quite how long for is another question! 2 1 Link to comment Share on other sites More sharing options...
RMweb Gold rodent279 Posted April 26 RMweb Gold Share Posted April 26 46 minutes ago, jamie92208 said: At times, the two machines on the Chiltern tunnels were getting 30 metres per day,each, double their design speed. There is some fantastic engineering going on. Jamie That would equate to boring Chipping Sodbury tunnel in around 3 months, all other things being equal. It took something like 3 years back in 1897. 2 1 Link to comment Share on other sites More sharing options...
RMweb Premium Compound2632 Posted April 26 RMweb Premium Share Posted April 26 1 hour ago, rodent279 said: That would equate to boring Chipping Sodbury tunnel in around 3 months, all other things being equal. It took something like 3 years back in 1897. The rate of progress depends not only on man vs. machine but also on the geology. 5 Link to comment Share on other sites More sharing options...
Ron Ron Ron Posted April 27 Share Posted April 27 22 hours ago, Compound2632 said: The rate of progress depends not only on man vs. machine but also on the geology. Indeed. See the link I posted further up this page, regarding the difficulties encountered with boring the Northolt West tunnels. https://www.geplus.co.uk/news/hs2-tbm-quartet-tackles-differing-geology-on-twin-bore-tunnel-under-london-22-04-2024/ . 2 1 Link to comment Share on other sites More sharing options...
Ron Ron Ron Posted April 27 Share Posted April 27 Last weekend at Burton Green... (Note: no work taking place on a weekend) . 4 1 2 Link to comment Share on other sites More sharing options...
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