Steam Turbine Foundation Bolts Grouting
Steam Turbine Foundation Bolts Grouting
(OP)
Hi,
I'm a relatively new member here.
I wanted to ask if anyone could explain technical reasons for the following:
1. Filling sand only in foundation bolt pockets for through and through foundations bolts of steam turbine.
2. Grouting foundations bolts for blind pockets.
Thank you.
I'm a relatively new member here.
I wanted to ask if anyone could explain technical reasons for the following:
1. Filling sand only in foundation bolt pockets for through and through foundations bolts of steam turbine.
2. Grouting foundations bolts for blind pockets.
Thank you.
RE: Steam Turbine Foundation Bolts Grouting
We've had several muti-MegaWatt turbine-generators break apart under load when foundations and mounts failed.
RE: Steam Turbine Foundation Bolts Grouting
I wanted to know why are they not grouted, whereas, bolts fitted in blind pockets are grouted.
RE: Steam Turbine Foundation Bolts Grouting
Jim
RE: Steam Turbine Foundation Bolts Grouting
#1. Holds down rigidly, but allows some movement laterally, for thermal or vib. damping
movement.
#2. Holds down and laterally rigidly.
The above is my bet…, so as Jimstructures suggests, asked the manufacturer for their reasons.
RE: Steam Turbine Foundation Bolts Grouting
I did ask them, but didnt receive any more detailed answer than what you have given, and was the same as your point 1.
However, what i dont understand is that once the turbine base frame is grouted, its fixed on all sides, then how is lateral movement still possible at all?
Secondly, why is there no need of allowing lateral movement when placed on ground with bolts grouted?
RE: Steam Turbine Foundation Bolts Grouting
RE: Steam Turbine Foundation Bolts Grouting
Thermal expansion of what, bolts? because after grouting, the turbine is fixed from all sides. If expansion occurs, it has to occur in the grouting material first to allow turbine base frame to expand subsequently.
And if the expansion is indeed for the bolts, why is it not required in the ground foundation with blind holes?
RE: Steam Turbine Foundation Bolts Grouting