An arc-shaped rolling dam capable of automatically washing sand and reducing silt and its operation method

Abstract

The invention discloses an arc type overflow dam capable of automatically washing away sand and reducing siltation and a running method of the arc type overflow dam. The arc type overflow dam capable of automatically washing away sand and reducing siltation comprises a dam body, a flow releasing and sand discharging hole, gate slots, gates, a guide wall and a protection bank. The arc type overflow dam capable of automatically washing away sand and reducing siltation is characterized in that the dam body is of an arc reinforced concrete structure; the flow releasing and sand discharging hole is formed in the right side of the dam body; the gate slots are formed in the inner walls of the two sides of the flow releasing and sand discharging hole; the gates are manual steel gates and are installed on the gate slots; the guide wall is of an anti-scouring reinforced concrete structure and is arranged on the upstream right bank; and the protection bank is of an anti-scouring reinforced concrete structure and is arranged on the downstream left bank. In the water season, the steel gates are opened, bend transverse ring flow formed by the arc dam body is utilized for automatically conducting flow releasing and sand washing; and in the dry season, the steel gates are closed, the water level is elevated, and water is stored. Compared with traditional mountainous area overflow dams, the arc type overflow dam has the beneficial effects that the form is decent and attractive, little mud and little sand are deposited in front of the dam, the siltation reducing cost is low, and the comprehensive benefits of the project are more obvious.

Description

technical field [0001] The invention relates to the technical field of hydraulic sand removal in water conservancy projects, in particular to an arc-shaped rolling dam capable of automatically flushing sand and reducing silt and an operating method thereof. Background technique [0002] Due to the characteristics of large slope of the riverbed, rapid water flow, and rapid flood fluctuations, the rivers in mountainous areas often suffer from river bank damage and river cut-off, which seriously affect the ecological environment of the river and the production and life of residents along the coast. As a low-head hydraulic structure with both "water storage" and "water discharge" functions, the rolling dam can effectively adjust the water level in front of the dam and the discharge flow, reduce the erosion of the river bed and river bank, and ensure the water for domestic irrigation and water along the coast. The ecological flow of rivers has been widely used in the comprehensiv...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems of serious sedimentation and high cost of manual dredging in front of rolling dams in mountainous areas, the present invention provides an arc with generous and beautiful structure, good scouring effect and low cost of silting reduction based on the principle of automatic sand washing and silting reduction by curved water flow Structural rolling dam and method of operation thereof

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