Underflow intercepting water intake structure and construction method

Abstract

The invention discloses an underflow intercepting water intake structure and a construction method. The structure is provided with a water diversion guide wall, a water intake side wall and a water intake bottom plate, and underflow can be effectively intercepted into a water intake; an anti-impact inverted filter layer is arranged, so that the smoothness of underflow drainage is guaranteed, and the situation that the normal work of the water intake is affected due to serious water intake sedimentation caused by seepage damage of a soil body is avoided; a water collecting gallery is arranged, so that the underflow can be effectively collected, a water intake valve well, a water intake pipe and a control valve are arranged on one side of the water collecting gallery, and the water intake pipe can conveniently take water from the water collecting gallery to the downstream; a water drainage and sand flushing valve well, a water drainage and sand flushing pipe, a control valve and a manhole are arranged on the other side of the water collecting gallery, so that the water intake can be conveniently emptied for operation and maintenance in the later period, and long-term normal operation of a project is guaranteed; and an overflow dam, an overflow dam side wall, a stilling pool and other structures are arranged, so that the requirements of surplus water or flood discharge and energy dissipation from the overflow dam are met, and the anti-skid stability of the water intake structure is guaranteed.

Description

technical field [0001] The invention provides a water intake structure and construction method for intercepting subsurface flow, which belongs to the field of water conservancy and hydropower engineering, and is suitable for the design and construction of water supply projects that use shallow subsurface flow groundwater to draw water for human drinking and irrigation. Background technique [0002] Underflow is the flow of shallow groundwater. Underflow comes from the infiltration and recharge of precipitation and surface water. It is mainly divided into pore water underflow, fissure water underflow and karst water underflow. Underflow is mostly distributed in gullies, valleys, springs and other areas in mountainous areas. The subsurface flow interception project is to build a water intake project to intercept the subsurface flow in the place where the subsurface flow is enriched, and to accumulate the subsurface flow and use pipes or channels to draw it out for drinking or i...

AI Technical Summary

Problems solved by technology

[0006] Aiming at the flood season or rainy season of the conventional submerged flow interception project, it is easy to cause floods to flood the top, and there are disadvantages such as complex structure, large floor area, high investment, inconvenient maintenance during the operation period, poor filtering effect, and serious siltation. The purpose of the present invention is to Provide a water intake structure and construction method for intercepting submerged flow. The structure is provided with a water guide wall, a water intake side wall and a water intake bottom plate, which can effectively intercept the submerged flow into the water intake, reduce the area occupied by the water intake, and reduce the amount of engineering and investment. ;An anti-scouring back filter layer is set up to ensure the smooth drainage of the underflow, and to avoid seepage damage to the soil, which will seriously affect the normal operation of the water intake due to siltation; a water collection gallery is set up to effectively gather the underflow. Water intake valve wells, water intake pipes, and control valves are installed on one side of the water collection corridor to facilitate the water intake pipes to take water downstream from the water collection corridor; Sand pipes, control valves and manholes are used to facilitate the operation and maintenance of the water intake in the later period to ensure the long-term normal operation of the project; overflow dams, overflow dam side walls, stilling pools and other structures are set up to ensure the anti-skid structure of the water intake Stability, the flood is discharged in an orderly manner from the overflow dam, and the energy is dissipated through the stilling basin, so as to prevent the flood from flooding the top of the water intake structure and causing adverse effects on the overall structure; at the same time, the entire water intake structure is buried. Insulation and antifreeze effect, especially suitable for intercepting subsurface flow projects in remote alpine areas

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