Dam foundation gallery connecting structure

The utility model discloses a dam foundation gallery connecting structure. The problem that a structure gap loses a waterproof effect under the effect of an outer load is avoided. The dam foundation gallery connecting structure comprises a bank slope bed rock, a riverbed covering layer and a dam foundation gallery. The dam foundation gallery is arranged on the riverbed covering layer. The dam foundation gallery comprises a concrete wall and an inner cavity defined by the concrete wall. A grouting flat hole is formed in the bank slope bed rock. The end of the dam foundation gallery is embedded into the bank slope bed rock and is connected with the grouting flat hole. A gap between the dam foundation gallery and the grouting flat hole is a structure gap. A first periphery water stopping belt is arranged in the structure gap. The end of the dam foundation gallery is embedded into the bank slope bed rock and is connected with the grouting flat hole, so that the structure gap is placed in the bank slope bed rock, the fixing effect on the dam foundation gallery from the bank slope bed rock is good, the influence on the structure gap is small when the outer load has an effect on the dam foundation gallery, the water stopping belt cannot be damaged easily, and the problem that the structure gap loses the waterproof effect is avoided.