Liseberg | Valkyria | B&M Dive Coaster
- Thread starter roomraider
- Start date
CrashCoaster
CF Legend
So just the drop and Immelmann left to do now?
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And over the lift hill too!
Efan
Mega Poster
No, it's not. Would be insane though!
Yup, stand corrected. Didn't look carefully enough!
Efan
Mega Poster
Imagine seeing another car soaring over you while you slowly ascend the lift... magical!
Theme Park Information
Roller Poster
This ride is looking amazing at the moment 
Pear
Strata Poster
According to this article the ride will open June at the earliest and possibly might not even open this year due to issues with the tunnel.
https://www.expressen.se/gt/lerkaos-hotar-lisebergs-rekordsatsning-i-sommar-/
https://www.expressen.se/gt/lerkaos-hotar-lisebergs-rekordsatsning-i-sommar-/
CrashCoaster
CF Legend
Oh dear. Well so long as it opens...
GuyWithAStick
Captain Basic
But I thought it was too small??
SilverArrow
Certified Ride Geek
Well that's annoying. I suppose if it's delayed the live will be off. Hm. Haven't yet been so not sure if I'd wait for 2019 or not if so.
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TMCoasters
Mega Poster
I'll be there in mid-June so it's looking doubtful that Valkyria will be open hopefully that means the park won't be busy though in anticipation for opening!
hopefully that means the park won't be busy though in anticipation for opening!
ATTACKHAMMER
Strata Poster
CSLKennyNI
Giga Poster
Liseberg has finally overcome the issues with the construction of the tunnel!
They have been continuously pumping out the groundwater, which has been causing them problems, and finally were able dig further down. The tunnel has now reached its final depth of 8 metres. Currently they are preparing to pour the tunnel's concrete floor.
Preparing to pour the concrete floor.
Now a summer opening is seeming realistic.
Since work on the station and electrics has been continuing while they were having their tunnel problems the park have said once the track is completed it won't be long until they can start testing.
The track for the drop while sitting on the car park has been wired up in preparation.
Information and pictures from Liseberg's Valkyria Facebook group and screenshots from a video released by the park.
They have been continuously pumping out the groundwater, which has been causing them problems, and finally were able dig further down. The tunnel has now reached its final depth of 8 metres. Currently they are preparing to pour the tunnel's concrete floor.
Preparing to pour the concrete floor.
Now a summer opening is seeming realistic.
Since work on the station and electrics has been continuing while they were having their tunnel problems the park have said once the track is completed it won't be long until they can start testing.
The track for the drop while sitting on the car park has been wired up in preparation.
Information and pictures from Liseberg's Valkyria Facebook group and screenshots from a video released by the park.
CrashCoaster
CF Legend
Thank God for that. I think this thing will look amazing when in operation (not that it doesn't already).
Wonder what they'll do about the groundwater when the tunnel is operational? I mean, building a structure below the groundwater level is like pressing a plastic cup down in a tub of water. As the structure is hollow, it is likely to be lighter than the volume of groundwater it displaces - i.e., it will float. The groundwater will press the structure up to an equilibrium level, like the waterline on a boat.
If they install a drain pipe to lower the groundwater level, every structure that is already "floating" in the soil will sink further down, since the equilibrium level is lowered. This also includes structures standing on the surface, since the soil loses some strength when it is drained of groundwater.
The other solution is to allow water to seep into the tunnel (relieving the pressure from groundwater by letting it flow freely - there isn't that much water coming in every hour, so it would be more of a trickle than a flow) and then just pumping it out. The Opera house in Oslo uses this technique to stay in place, there are chambers below the basement where water flows in and is continuously pumped out. But that's an "active" and quite expensive solution.
I guess there is a third solution, just weighing down the tunnel so the equilibrium level goes down to the groundwater level. But that would require a huge amount of concrete.
I don't doubt they've got a solution for this ready. Underground structures tend to be really well planned, after all. Just wondering which solution they are going for.
If they install a drain pipe to lower the groundwater level, every structure that is already "floating" in the soil will sink further down, since the equilibrium level is lowered. This also includes structures standing on the surface, since the soil loses some strength when it is drained of groundwater.
The other solution is to allow water to seep into the tunnel (relieving the pressure from groundwater by letting it flow freely - there isn't that much water coming in every hour, so it would be more of a trickle than a flow) and then just pumping it out. The Opera house in Oslo uses this technique to stay in place, there are chambers below the basement where water flows in and is continuously pumped out. But that's an "active" and quite expensive solution.
I guess there is a third solution, just weighing down the tunnel so the equilibrium level goes down to the groundwater level. But that would require a huge amount of concrete.
I don't doubt they've got a solution for this ready. Underground structures tend to be really well planned, after all. Just wondering which solution they are going for.
You're right about it being an active system, but we see sump pumps required to run regularly in basements all over the place. I think these days it's just a noted fact of life with building complex structures. The reliability and operational cost is very good these days.
That would be my bet for how they've solved it - seems like the simplest option (for the groundwater levels and buoyancy issues you identify).