HS2 Bowood Lane Overbridge

[@DaveFiggley]

Nice one, QM 👍 It will be interesting to see the cutting taking shape. At the moment the level of the viaduct and these two overbridges is akin to an optical illusion. It just doesn't look viable. Your footage does show that everything lines up. Ha. Keep 'em coming ...

[@stevetony6876]

Thanks! Yes it will be interesting to see the cutting. I was hoping to see some progress on the cutting there. Alas no...maybe next time. Haha yes everything lines up..good spot!

[@willhemmings]

Not an engineer, so I fail to understand the principle of building the deck before excavating the cuttings underneath. Can't figure any logic either economic, practical or environmental. I know that this was a lovely little sunken lane with Jones Hill Wood on one side and the folds of the Chiltern Hills on the other. Introducing the pylons was an unfortunate intrusion into this lovely landscape; the surgical imposition of this giant stent across the landscape will complete the unfortunate transformation

[@JohnHoward-wc9kk]

I would reserve judgement until it is complete. It appears that the 'trace' of the two rail lines will be down in a cutting, so that will alleviate the visual impact. That certainly has added to the build cost, but it is probably a price worth paying in this area.

[@stevetony6876]

Interesting.. I don’t immediately recall this method of construction anyway else on the project. Thanks

[@Polarbear1-b6j]

Top down construction is being used on a number of bridges along the project, it's nothing new. In fact there was an example in the last video, the Princes Risbourough Rail Bridge.

[@paulkent7400]

Top down construction. is significantly safer, working at height is one of the biggest killers in the construction industry. It also means you don't need lots of temporary propping to support the deck while the concrete is curing as it is sat on the ground.

[@TrevorWilliams-fq8mg]

And can be faster to construct .