The utility model discloses a foundation structure of a closed drainage open channel of a
red mud reservoir, which is constructed by an ash water
absorption layer (3), a gravel foundation layer (4), a lower
geogrid (8-1), a lower gravel foundation layer (5), an upper
geogrid (8-2), an upper gravel foundation layer (6) and a silty clay
cushion layer (7) which are sequentially backfilled and paved from bottom to top on a
red mud lower digging line (1), and the ash water
absorption layer (3), the gravel foundation layer (4), the lower
geogrid (8-1), the lower gravel foundation layer (5), the upper geogrid (8-2), the upper gravel foundation layer (6) and the silty clay
cushion layer (7) are arranged on the
red mud lower digging line (1). According to the utility model, the problems of poor water permeability and low
bearing capacity of red mud in a central area are solved, and the foundation stability is improved from an integral structure; the problem of uneven foundation collapse caused by difficult drainage after gravel compaction of the fine-grained red mud is solved, and the safety and stability of a construction working face are guaranteed; the
bearing capacity of the foundation is improved, meanwhile, the foundation treatment range is reduced, resource waste caused by single soil covering and gravel compaction is avoided, and investment is saved.