Protective structure and protective method for preventing erosion of concave bank of river course

Abstract

The invention discloses a protective structure for preventing and controlling a riverway concave bank from being eroded. The protective structure comprises an overflow weir formed through double-layerinlaying, a protective arm and dam abutments formed by inlaying large dimension stones. The relatively higher protective arm is arranged on the concave bank side prone to erosion of a riverway, and the relatively low overflow weir is arranged at the center of the riverway, so that river water is centralized in the overflow weir and a protection-free convex bank to flow through a river bend, flowing of the river water close to the concave bank is retarded, the shear stress at the concave bank is reduced, silt at the concave bank is prevented from being eroded by the river water, meanwhile water level rise before the overflow weir is quick, a scour pit is formed behind the weir, pressure gradient is formed on a river bed due to water level difference, and surface water and underground waterexchange is promoted. Compared with a traditional method, the protective structure is low in cost and long in service life, can also prevent the concave bank from being eroded, promotes surface waterand underground water exchange, thus improves the self-cleaning capacity of the riverway, relieves riverway pollution and has a wide application prospect in the fields such as channel improvement ofriverway and mountainous area drainage basins.

Description

Technical field [0001] The invention relates to the field of river water and soil conservation and river ecological treatment, in particular to a protection structure and a protection method for preventing and controlling erosion of the concave bank of the river. [0002] technical background [0003] Riverbank erosion is an important way of horizontal evolution of rivers, and it exists in almost all river banks. After the riverbank is eroded, the ecological environment will be degraded, and riverbank collapse may even cause major accidents. Therefore, riverbank erosion is also an important threat to the coastal land, the ecological environment and the safety of people's lives and properties. In the process of land remediation and river improvement, maintaining water and soil and preventing river bank erosion have always been the top priorities. Almost all natural rivers are curved. Because of the unique flow characteristics of the river bend, the slope of the concave bank of the ...

AI Technical Summary

Problems solved by technology

[0006] Purpose of the invention: the purpose of the present invention is to provide a protection structure and protection method for preventing and controlling the erosion of the concave bank of the river channel, so as to solve the deficiencies in the prior art

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