Seal structure for gas turbine

A seal structure for a gas turbine comprising:

• a seal ring holding ring supported on an inner shroud of a stationary blade;
• a first brush seal supported by said seal ring holding ring on an upstream side thereof with respect to a main current gas flow, said first brush seal including a plurality of sections having predetermined gaps for accommodating thermal expansion of said first brush seal;
• a labyrinth seal supported by said seal ring holding ring on a downstream side thereof with respect to the main current gas flow, said labyrinth seal including a plurality of sections having predetermined gaps for accommodating thermal expansion of said labyrinth seal;
• and
• a second brush seal supported by said seal ring holding ring between said first brush seal and said labyrinth seal, said second brush seal including a plurality of sections having gaps for accommodating thermal expansion of said second brush seal,
• wherein each of said sections of said first brush seal, said labyrinth seal and said second brush seal has opposite end portions defining oppositely facing rectangular cut surfaces,
• wherein the rectangular cut surface at a first end of one of said sections confronts a rectangular cut surface at a second end of another of said sections so as to define a path having axial segments interconnected by a radially extending segment that is generally perpendicular to said axial segments, and wherein said radially extending segment is longer than said axial segments, wherein at least one of said axial segments extends through a majority of the axial length of said respective section.