The replacement of 42 anchor bolts in a diesel engine on a concrete foundation is not an easy job, however, with these steps you can have a good idea of how the Alphatec Engineering SL team did it:
1- Diamond Core Drilling
2- Diamond Wire Cut
3- Take out the concrete blocks
4- Replacement of anchor bolts for new ones
5- New rebar & concrete
6- Regrout with green epoxy grout Alphatec®️ 800
The job was part of the foundation repair of a Mitsubishi–MAN diesel engine, type 18V52/55B, that drives a brushless alternator of 13 MW capacity, installed in 1989.
Even though it was not the oldest of the units at the site, this one developed vibration problems, forcing a reduction in engine speed to avoid major damage, and resulting in decreased efficiency.
The result of this 68-day intervention was the vibration reduction and the possibility of full power operation for many years to come.
CUC (Commonwealth Utility Corporation)
Saipan Main Power Plant
Replacement of 42 anchor bolts in a Mitsubishi–MAN diesel engine 18V52/55B
Mitsubishi–MAN diesel engine 18V52/55B that drives a brushless alternator of 13 MW capacity
August – September 2016
Lower Base, Saipan, Northern Marianas Island