Novel gallery structure in concrete dam

The utility model discloses a novel gallery structure in a concrete dam, which comprises a gallery structure in the dam, a gallery bottom plate and a conventional drainage ditch, the conventional drainage ditch is arranged at the bottom of the gallery structure in the dam close to the downstream side, a novel drainage ditch is arranged at the bottom of the gallery structure in the dam close to the upstream face side, and the novel drainage ditch is provided with a drainage ditch cover plate. During the construction period of the bottom curtain of the concrete dam, the wider bottom plate of the drainage ditch can be used as a construction platform of curtain grouting machinery, and meanwhile, the length of a drilling concrete section is reduced. In the operation period, the wide drainage ditch cover plate facilitates walking of people, and potential safety hazards caused by the wet and slippery gallery ground are reduced. The novel gallery structure in the dam is simple in structure and convenient to construct