Roller compacted concrete gravity dam keyway type kerf structure and construction method thereof

The invention relates to a roller compacted concrete gravity dam keyway type kerf structure and a construction method thereof. The technical problem to be solved by the invention is to provide a roller compacted concrete gravity dam keyway type kerf structure and a construction method thereof so as to improve the overall safety of a roller compacted concrete gravity dam, simplify the construction and save project investment. The technical proposal for solving the problem is as follows: the roller compacted concrete gravity dam keyway type kerf structure has a keyway type kerf; and the roller compacted concrete gravity dam keyway type kerf structure is characterized in that: the keyway type kerf is a keyway in the form of a polygonal line; the keyway thickness h is between 40 and 60 cm, the keyway bottom width is an integral multiple of the length of a cutting blade and is more than 3 m and less than 5 m, and 2-4 layers of chemical fiber braided cloth are embedded into the keyway type kerf. The roller compacte