Tilt up panel repair
Tilt up panel repair
(OP)
Hi, my question is whether is possible to repair a damage tilt up panel in situ..
The building is a steel portal frame factory approximately 6.2m tall at the apex, on the gable end 2 panels have been damaged by a truck impact, damage is below 2.5m height. The panels are 3m wide each and span vertically. We wer,e thinking of cutting out and replacing the bottom section by supporting the remaining top sections first, then forming up and casting the new bottom sections however I have a couple of concerns
-the cast section would not be as flat as the remaining section and would be quite difficult I assume. However replacing the whole panel is not easy because of no access for cranes etc..
- maintaining continuity of bending strength is difficult across the join.. ie starter bars.. also shrinkage of new concrete would cause a small gap at the join..
Thanks very much
The building is a steel portal frame factory approximately 6.2m tall at the apex, on the gable end 2 panels have been damaged by a truck impact, damage is below 2.5m height. The panels are 3m wide each and span vertically. We wer,e thinking of cutting out and replacing the bottom section by supporting the remaining top sections first, then forming up and casting the new bottom sections however I have a couple of concerns
-the cast section would not be as flat as the remaining section and would be quite difficult I assume. However replacing the whole panel is not easy because of no access for cranes etc..
- maintaining continuity of bending strength is difficult across the join.. ie starter bars.. also shrinkage of new concrete would cause a small gap at the join..
Thanks very much






RE: Tilt up panel repair
If not, you could have the contractor remove the concrete of the damaged section and leave the reinforcing to allow for a splice. The small gap at the joint would not concern me at all. The shoring may be tricky, but a couple of holes for needle beams may solve that issue.
No matter what you do, it will look like what it is, a patch.
RE: Tilt up panel repair
We are going to use channels on either side of the wall for the propping, with masonry anchors that can be removed afterwards
I still think pouring and vibrating the concrete right up to the underside of the remaining section is going to be difficult..
RE: Tilt up panel repair
If you do have them cast the wall, have them add pour spouts. This will allow them to create a little head pressure and will allow for access for the vibrator. It will leave an area of concrete for cutting and patching, but it will be worth it.
RE: Tilt up panel repair
Mike McCann
MMC Engineering
RE: Tilt up panel repair
Well that is the problem.. Matt has mentioned leaving some of the existing steel hanging out at the bottom.. But I was concerned about shrinkage of the new concrete reducing the contact at the join
Any suggestions?
Thanks
RE: Tilt up panel repair
Mike McCann
MMC Engineering
RE: Tilt up panel repair
RE: Tilt up panel repair
Thanks for the replies.
I did think of dry-packing, however it would look pretty ugly!
RE: Tilt up panel repair
RE: Tilt up panel repair
RE: Tilt up panel repair
RE: Tilt up panel repair
The OP said these were tilt panels. Tilt panels are site cast and not prestressed.
RE: Tilt up panel repair
What do you think of the attached sketch? I need to support the tops of the columns laterally somehow, maybe join pairs together with diagonals and struts in a bracing frame? Is there a cheaper way do you think?
Thanks
RE: Tilt up panel repair
RE: Tilt up panel repair
I can either support on the adjacent panels as this new sketch shows (i'll have to justify they can work) or install SHS posts at the ends out of the way.
Each panel weighs in the order of 100 kN
RE: Tilt up panel repair