Anti-scour and flow-reducing ecological dam

Abstract

The invention provides an anti-scour and flow-reducing ecological dam which comprises a protection bottom, a plurality of bottom-layer sand blocking block bodies and a plurality of second-layer sand blocking block bodies, the bottom-layer sand blocking block bodies are laid on the protection bottom at intervals, the second-layer sand blocking block bodies are laid on the bottom-layer sand blocking block bodies, and an installation distance is reserved between every two adjacent bottom-layer sand blocking block bodies. And each second-layer sand-blocking block body is obliquely erected in the mounting distance between two adjacent bottom-layer sand-blocking block bodies below the second-layer sand-blocking block body. The sand-blocking and water-permeable combined embankment (dam) has the beneficial effects that the sand-blocking and water-permeable combined embankment (dam) is formed through combined arrangement of the sand-blocking block bodies and the hollow block bodies, the flow speed of tide reciprocating flow and wave bottom at the embankment head is reduced, especially the flow speed of beach-brushing water flow can be reduced by more than 20%, silt reduction in a shield area is achieved, and the scouring depth of a seabed near the embankment head is reduced and stabilized; the problem that the stability and safety of an embankment body are threatened due to seabed scouring depth and range development expansion caused by breakwater head flip flow of the wave-proof and sand-blocking embankment is solved, and meanwhile the influence on the marine ecological environment is reduced or improved.

Description

technical field [0001] The invention belongs to a hydraulic structure in the fields of coastal engineering and port engineering, in particular to an ecological dam for preventing erosion and reducing flow. Background technique [0002] Radiation sandbars, estuary deltas and other silty coasts, as well as the dykes on sandy coasts, will increase the flow velocity due to the effect of current flow, resulting in the erosion of the seabed near the dykes. Safety. The commonly used protection methods for the head of the breakwater and sand-retaining embankment are three combinations of interlocking block software row plus bottom block protection, sand rib soft body row plus bottom block protection, and protective steel sheet pile plus bottom block protection. The commonly used structures have the characteristics of large sea area occupation, large amount of riprap, and high construction cost, which have a great impact on the ecological environment. Due to the increase of the flo...

AI Technical Summary

Problems solved by technology

Commonly used structures have the characteristics of occupying a large sea area, a large amount of riprap, and high cost, and have a great impact on the ecological environment

Due to the increase of the flow velocity at the head of the dike, it will still cause erosion at the edge of the bottom protection range, which will first cause damage to the bottom protection structure, and then develop and affect the structural safety of the dike

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