Structures and construction method for main canal entering river section drop energy dissipation and downstream canal slope repairing and reinforcing

Abstract

The invention discloses structures and construction method for main canal entering river section drop energy dissipation and downstream canal slope repairing and reinforcing. The drop energy dissipation structure comprises a first-stage stilling sill arranged in the middle part of a drop chute and perpendicular to drop water flow, wherein a second-stage stilling sill perpendicular to the drop water flow is arranged at the tail of the drop chute, and the height of the first-stage stilling sill is higher than the height of the second-stage stilling sill; the canal slope repairing and reinforcingstructures are arranged at the two banks of the confluence of a river channel and a main canal, the canal slope repairing and reinforcing structures comprise canal bottoms, wherein canal slopes whichare obliquely arranged upwards are arranged on the two sides of the canal bottoms; and top sealing key-walls are further arranged on the outer sides of the tops of the canal slopes, first-stage key-walls are arranged at the bottoms of the canal slopes, and second-stage key-walls are arranged between the first-stage key-walls and the canal bottoms. It can be guaranteed that the water flow dissipates energy in the drop chute, the drop energy dissipation effect is improved, a flow guide effect on the water is achieved, and water flow turbulence is avoided; and mortared rubble layers are good instability and high in erosion resistance, so that long-term stress falling of lining structures of the canal slopes on the two banks of the downstream of the river channel is avoided, canal slope water and soil loss and loosening are avoided, and potential safety hazards are eliminated.

Description

Technical field: [0001] The invention relates to the field of water conservancy engineering, in particular to a repair and reinforcement structure and a construction method for a downstream canal slope of a main canal entering a river section where water falls and energy is dissipated. Background technique: [0002] In water conservancy transportation projects, there are several main canals on both sides of the river to facilitate the collection of water in the main canals into the river. Since the water level of the main canals is generally higher than the water level of the river, and there is a certain angle between the main canals and the river, the main canals Stilling sills are generally set up at the intersection with the river to dissipate the energy of the water flow. The position of the current stilling sill is located at the end of the water drop. Due to the high stilling sill, it is easy to generate new water flow and fall during the flow, resulting in incomplete...

AI Technical Summary

Problems solved by technology

The position of the current stilling sill is at the end of the water drop. Due to the high stilling sill, it is easy to generate new water flow and fall when the flow is over, resulting in incomplete energy dissipation. After falling into the river, the water flow deflects at a certain angle. The energy dissipation in the groove is completed, and the deflection after the outflow will cause turbulence, deflection and local erosion of the water flow. The lining structure of the canal slope on both sides of the downstream of the river is easy to fall off after a long time, resulting in soil erosion and loosening of the canal slope. form a safety hazard

Images