M17/M18 - Gort to Tuam [open to traffic]

D Trent wrote: »

kunt

D Trent wrote: »

rat

Less of this please.

Moderator

notharrypotter wrote: »

Apart from wishful thinking do you have anything to support this?

It's on Irish motorways web site

Mahangh corofin pic1 17/01/15 pic2 13/09/15

Rathmorrisy on a dark evening the have started on the m17

Ballinphuil corofin pic 1 20/01/15 before ripping and blasting pic 2 13/09/15

The underpass at corofin

Judging by the progress on the pictures I think it's fair to say this should open by the end of 2017 if not sooner. Although it's quite a big scheme 56km is a lot of motorway.

m17 wrote: »

What's happening around tuam very quite over the past few weeks

All the workers gone back to school.....

red bull wrote: »

Pile driving in bog

Don't think it's piling, it's stucking the bog water out, the stoned bog area will then be left to settle for 12months before anymore fill

Charlie Charolais wrote: »

Don't think it's piling, it's stucking the bog water out, the stoned bog area will then be left to settle for 12months before anymore fill

Ya, its called sur-charging, its common enough on soft ground, prevents the road/final surface from settling when the traffic goes on it. If its very soft they might still pile a section of it.

nowecant wrote: »

When they built the Limerick Neenagh section of the M7 they went through two section of bog which they were warned by locals to stay out of. A few months before it was meant to open an entire section of the nearly complete motorway broke off, I kid you not http://www.irishtimes.com/news/part-of-motorway-which-sank-into-bog-to-open-in-october-1.644674

Took them a very long time and a lot of expense to fix it in the end.

There is a great thread here on boards about it and a lot of great pictures. They ended up digging up a few KM of the motorway and sinking huge piles and then laying a concrete cap before they could rebuild the motorway on top

Do not underestimate bogs!

I worked on that job so let me explain what actually happened. When the initial site investigation was being carried out the company carrying out the survey found the depth of solid material to be approx 9 to 11 metres deep. they came to a section of bog which was very soft at Drominboy so they decided to come at it from the other side. Again the depth came in around the 9 to 11 metres to hit solid material until it got too soft to continue. They assumed it was the same all the way through to where they stopped previously coming from the other direction. Assumption being the mother of all fcuk ups, the bog ended up being bowl shaped with depths of over 20 metres being recorded when piling.The piles that they made on site were to slim/slender and when the piles were driven in the soft area they basically buckled under the weight of the new road and so start to sink. So a massive concrete slab was poured over the whole area to spread the load of the road hence the photos on the other thread.
When they were making the haul road, 18 Volvo A40 dumptrucks hauled rock solid for a day and made 20 metre long of a road, all the bog was pushed up either side knocking over trees and making a wall of bog both sides!!
Bogs indeed cannot be trusted!

Beam lift starting at mahangh bridge corofin next Tuesday 29/09/15 for 2days

Czhornet wrote: »

Ya, its called sur-charging, its common enough on soft ground, prevents the road/final surface from settling when the traffic goes on it. If its very soft they might still pile a section of it.

Thers no pile driving, what they are doing is vertical drainage to varying debths 9.5 metres currently, when this is complete two layers of rock will be placed and then it will be allowed to settle for some months, movement will be monitored and based on this the next stage will progress.