Desilting canal

Abstract

The invention discloses a desilting canal, and belongs to the technical field of sediment treatment in hydraulic engineering. The desilting canal comprises a water inlet canal, a bend, a sediment transport corridor, a rotational flow desilting basin and a water outlet canal, wherein the upstream part of the bend is connected with the water inlet canal; the downstream part of the bend is connected with the water outlet canal; a central angle of the bend is 270 degrees; the water outlet canal passes through the lower side of the water inlet canal; a circular-arc-shaped overflow baffle is arranged in the bend; the bottom position of an inner side wall of the bend is provided with a narrow slit; the sediment transport corridor is positioned below the bend, and is communicated with the bend through the narrow slit; the tail end of the sediment transport corridor is connected with the rotational flow desilting basin. The desilting canal occupies a small area, can be arranged close to a canal head, and can be used for effectively remove coarse silt, so that the problems of difficulty in land acquisition for building the desilting basin at a position far away from the canal head in an irrigated area, easiness of siltation in long-distance transport of coarse silt, and the like are solved.

Description

technical field [0001] The invention belongs to the technical field of sediment treatment in water conservancy projects, and in particular relates to a sand discharge channel. Background technique [0002] There are mostly sandy rivers in northern my country, and the problem of sedimentation in the water diversion channels is prone to occur when diverting water for irrigation on sandy rivers. In order to solve the problem of sediment deposition in water diversion channels in irrigation districts, grit chambers are generally built to deal with harmful sediment entering the water diversion channels. The grit chamber is an effective measure to solve the sedimentation problem in the irrigation area. Its applicability and application quantity are far greater than other secondary sediment treatment facilities such as the sand discharge vortex, the sand discharge funnel, and the self-discharge corridor. However, the grit chambers also have shortcomings such as large land occupatio...

AI Technical Summary

Problems solved by technology

However, the grit chambers also have shortcomings such as large land occupation, short service life, and difficulty in reusing. After the grit chambers built near the canal head were silted up, they were forced to choose to install grit chambers farther downstream from the canal head. Pond, which may encounter problems such as difficulties in land acquisition, long-distance transportation of coarse sand and easy deposition

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