Large high-water head underground well shaft structure

The utility model discloses a large high-water head underground well shaft structure, which comprises a well shaft body, wherein the well shaft body is defined by elevator shaft lining concrete, a plurality of vertical water drainage passages and transverse water drainage pipelines are arranged at the outer side of the elevator shaft lining concrete, are respectively built by hollow bricks, and are longitudinally and transversely staggered to form a hollow brick grid structure, the hollow bricks are arranged at one side, near a rock body, of the well shaft wall, and are staggered and embedded in the elevator shaft lining concrete, and drilling holes are formed in the longitudinal and transverse crossing parts of the hollow bricks and are communicated with an inner cavity of the corresponding hollow brick. The large high-water head underground well shaft structure has the advantages that by utilizing the hollow structure in each hollow brick, the natural water circulating passages is provided for seepage water flow, the necessary condition is provided for centralized drainage, the problem of outer water pressure-resistant stability of the large well shaft produced by the action of high-water head underground water is effectively solved, the thickness of the concrete lining and the number of reinforced bars for resisting the outer water pressure are reduced, and the purposes of safety, reliability, economy, and convenient construction are realized.