Head part of an annular combustion chamber of a gas turbine having a holding part to secure a burner collar in a bayonet-catch type manner

A head part of an annular gas turbine combustion chamber having an end wall with passage openings which each accommodate a burner, comprising:

• a heat shield inserted into the passage opening and covering a back side of the end wall which faces toward the combustion chamber;
• a holding part fastened on the end wall together with the heat shield;
• a burner collar positioned within the passage opening in the end wall and being radially displaceable with respect to the holding part, said burner collar accommodating a respective burner;
• wherein said holding part has an annular shape and, at least in segments, has flanks between which the burner collar is held via lugs arranged on said burner collar;
• wherein said heat shield has a ring attachment on which the holding part is placed so as to be situated on a front side of the end wall;
• wherein said burner collar is held via its lugs in a bayonet-catch-type manner between said flanks of said holding part, said holding part together with said heat shield being screwed to the end wall;
• and
• wherein in an area of said flanks, said holding part has noses which, after a bending, secure the burner collar against rotation.