Suspended underflow type gradient stilling basin energy dissipation system

A technology of stilling pools and cascades, applied in water conservancy projects, sea area engineering, coastline protection, etc., can solve problems such as high project cost, increased construction period, and layout of stilling pool flood discharge tunnels, etc., to reduce the difficulty of layout, ensure safety, Avoid the effect of unfavorable geological conditions

Active Publication Date: 2014-12-17
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for projects with narrow valleys, vertical mountains on both sides, wide upstream, narrowing downstream, and complex geological conditions on the bank slope, it is difficult to arrange stilling pools and flood discharge tunnels with large single-width flow according to the existing technology. Or adopt the existing energy dissipation facilities layout method, the project cost is high, and the construction period is increased

Method used

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  • Suspended underflow type gradient stilling basin energy dissipation system
  • Suspended underflow type gradient stilling basin energy dissipation system
  • Suspended underflow type gradient stilling basin energy dissipation system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The engineering overview of embodiment 1 and comparative example 1 is as follows:

[0025] A power station is built in a narrow river valley, with steep mountains on both sides, and the downstream river gradually narrows. The upstream water level elevation of the reservoir is 762.30m, the downstream water level elevation is 672.30m, the drop is 90m, and the discharge flow is 320m 3 / s.

[0026] Aiming at the above projects, two energy dissipation systems of Example 1 and Comparative Example 1 were used to carry out hydraulic model tests.

[0027] Example 1

[0028] This embodiment adopts the suspended bottom flow cascaded stilling pool energy dissipation system, including three-stage stilling pools 2 arranged at different elevations on the side of the reservoir dam body, the upstream water diversion channel 1 leading out the water in the reservoir, and all levels of stilling pools. The spillway 4 corresponding to the pool and the bank diversion channel 5 that introduc...

Embodiment 2

[0034] The engineering overview of embodiment 2 and comparative example 2 is as follows:

[0035] A power station is built in a narrow river valley, with steep mountains on both sides, and the downstream river gradually narrows. The entrance elevation of the energy dissipation system is 1126.00m, the exit elevation is 1001.00m, the drop is 125m, and the flood discharge flow is 650m 3 / s. Aiming at the above projects, two energy dissipation systems of Example 2 and Comparative Example 2 were used to carry out hydraulic model tests.

[0036] Example 2

[0037] This embodiment adopts the suspended bottom flow cascaded stilling pool energy dissipation system, including three-stage stilling pools 2 arranged at different elevations on the side of the reservoir dam body, the upstream water diversion channel 1 leading out the water in the reservoir, and all levels of stilling pools. The spillway 4 corresponding to the pool and the bank diversion channel 5 that introduces the water i...

Embodiment 3

[0043] The engineering overview of embodiment 3 and comparative example 3 is as follows:

[0044] A power station is built in a narrow river valley, with steep mountains on both sides, and the downstream river gradually narrows. The entrance elevation of the energy dissipation system is 537.00m, the exit elevation is 417.00m, the drop is 120m, and the flood discharge flow is 750m 3 / s. Aiming at the above projects, two energy dissipation systems of Example 3 and Comparative Example 3 were used to carry out hydraulic model tests.

[0045] Example 3

[0046] This embodiment adopts the suspended bottom flow cascaded stilling pool energy dissipation system, including three-stage stilling pools 2 arranged at different elevations on the side of the reservoir dam body, the upstream water diversion channel 1 leading out the water in the reservoir, and all levels of stilling pools. The spillway 4 corresponding to the pool and the bank diversion channel 5 that introduces the water in ...

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Abstract

The invention discloses a suspended underflow type gradient stilling basin energy dissipation system. The system comprises multiple levels of stilling basins, an upstream diversion canal, flood overflow roads and a bank diversion canal, wherein the multiple levels of stilling basins are arranged at different altitudes on a mountain body on the side surface of a reservoir dam body; the upstream diversion canal is used for guiding water in a reservoir out; the flood overflow roads correspond to the multiple levels of stilling basins; the bank diversion canal is used for guiding the water in the stilling basin at the lowest altitude into a riverway; the downstream ends of adjacent two levels of stilling basins are opposite in directions; overflow weirs are arranged on the side walls at the downstream ends of the multiple levels of stilling basins. The suspended underflow type gradient stilling basin energy dissipation system provided by the invention can be applied to a narrow river valley and a low-flow rate high-water head hydraulic engineering with a gradually narrowed downstream riverway, the energy dissipation efficiency can be improved, the safety and the economy of a project are improved, and the difficulty degree of center arrangement is reduced.

Description

technical field [0001] The invention belongs to the technical field of flood discharge and energy dissipation in water conservancy and hydropower projects, and in particular relates to an energy dissipation system suitable for combining stilling pools and bottom flow energy dissipation in narrow valleys and gradually narrowing downstream rivers in small-flow and high-head hydraulic projects. Background technique [0002] In the construction of high head hydropower stations, in order to ensure the safety of water conservancy projects in operation, a series of flood discharge and energy dissipation measures are required. Traditional energy dissipation measures include traditional underflow energy dissipation, deflected flow energy dissipation and surface flow energy dissipation. New energy dissipation facilities include vertical shaft swirl energy dissipation, wide end pier, ladder energy dissipation, hole plug orifice energy dissipation, etc. However, for projects with narrow...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02B8/06
Inventor 张建民许唯临何小泷彭勇刘善均王韦邓军曲景学田忠张法星周茂林
Owner SICHUAN UNIV
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