Retrofitting RCC Wall with a hole

[ikka]

Hi Everyone,

I was asked to look at a hole on a RCC wall and give rehabilitation method. The wall is 3m high RCC Panel wall subject to minimal to no axial load, only wind load act as a lateral load. The wall was hit by an excavator arm. As from the photos, the hole is 1200mm dia (maximum) in size. The reinforcement has been cut and bend out of plane. It has a SL92 central mesh and is 150 mm thick. I was thinking of using Sika product for filling the hole, but what can i do about the reinforcement? Would i have to chemical gout in new reinforcement?
Would bolting a PFC (at 300mm centers) on the face of the wall above the hole to act as a lintel and distribute the load to either side of the hole and simply filling the hole with Sika product be enough?

Thanks in advance for all helpful comments.

 

[ANE91]

Chip out the hole into a slightly larger square shape with no feathered edges, using a #15 chipping hammer. Cut out damaged bars. Drill and epoxy new reinforcement. Clean and scarify the concrete edges. Fill the hole with material that shrinks the least relative to whatever is available in your market. Preplaced-aggregate concrete is my go-to for this type of situation. I've also seen it done with drypacking.

Cracks look narrow enough that route-and-seal is your best bet.

 

[jayrod12]

That's a fair amount of cracking outside of the hole area. If it were me, I'd likely just be replacing the panel outright. The cost of the preparation and crack repairs add up quickly, removal and replacement of a single panel would be fairly quick and give more confidence going forward.