Pond expansion joint structure

The utility model relates to a construction technical field in pond discloses a pond expansion joint structure, and it includes and a concrete slab 1 and the 2nd concrete slab 7 are equipped with expansion joint 5 between a concrete slab 1 and the 2nd concrete slab 7, is equipped with waterstop 6 on the expansion joint 5, being equipped with first sleeve pipe 3 on the concrete slab 1, being equipped with first dowel steel 4 in the first sleeve pipe 3, 4 other end settings of first dowel steel are in the 2nd concrete slab 7, and first dowel steel 4 and first sleeve pipe are equipped with first buffer layer 2 between 3, being equipped with second sleeve pipe 9 on the 2nd concrete slab 7, being equipped with second dowel steel 8 in the second sleeve pipe 9, 8 other end settings of second dowel steel are in a concrete slab 1, and second dowel steel 8 and second sleeve pipe are equipped with second buffer layer 10 between 9. The utility model discloses a dowel steel has improved concrete slab's bearing force, redu