It is a kind of retaining dam built

It is a kind of retaining dam built in the canyon, which is composed of horizontal arch with convex face facing upstream and both ends close to the canyon wall. It is a kind of water retaining structure, which can bend to the upstream of the plane and form a curve, and can transfer part of the horizontal load to both sides. It's a space and a body structure. With the help of the arch, all or part of the water pressure is transmitted to the bedrock on both sides of the valley. Compared with gravity dam, the stability of dam body under the action of water pressure does not need to rely on its own weight to maintain, mainly using the bedrock reaction at the bottom of arch to support. The arch ring section is mainly subject to axial reaction, which can make full use of the strength of dam construction materials. In topography, the two sides of the dam site are asymmetric and the stress is uneven. There is not enough rock support at the downstream side of the dam end to ensure the stability of the dam body.