Antiseismic design method of impervious body of 200 m high concrete face rockfill dam

The invention belongs to the technical field of water conservancy and hydropower, and particularly relates to an antiseismic design method of an impervious body of a 200 m high concrete face rockfill dam. The method comprises the steps of arranging a first-level platform at the horizontal construction seam of the upstream concrete face of the 200 m high concrete face rockfill dam; carrying out curtain grouting for reinforcement on the bottom zone of the platform; carrying out concrete toe board construction on the platform; connecting the toe boards with the upper concrete face and the lower concrete face through connecting seams, and arranging water-stops, so as to form an integral impervious system for the 200 m high concrete face rockfill dam; and laying geogrids on the rockfill zone, higher than 160 m, of the dam body. According to the antiseismic design method, the risk that the tension-compression damage, slab staggering and disengaging occur on the concrete face structure can be effectively reduced, and the strong shock resistance of the impervious body structure of the 200 m high concrete face rockfill dam is remarkably improved.