Underflow type stair stilling pool energy consumption system

A stilling basin and bottom flow technology, applied in the field of energy dissipation systems, can solve the problems of increased construction period, model layout of stilling basin flood discharge tunnels, and high project cost, so as to ensure safety, avoid unfavorable geological conditions, and reduce the difficulty of layout Effect

Inactive Publication Date: 2015-01-07
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for projects with narrow river valleys, vertical mountains on both sides, rapid changes in downstream channels, and complex geological conditions on bank slopes, it is difficult to arrange stilling pools and flood discharge tunnels with large single-width flow according to the existing technology, or use The arrangement of energy-dissipating facilities in the prior art requires high project cost and long construction period

Method used

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  • Underflow type stair stilling pool energy consumption system
  • Underflow type stair stilling pool energy consumption system
  • Underflow type stair stilling pool energy consumption system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The engineering overview of embodiment 1 and comparative example 1 is as follows:

[0027] A power station is built in a narrow river valley, with steep mountains on both sides, and the downstream channel quickly changes from narrow to wide. The upstream water level elevation of the reservoir is 621.00m, the downstream water level elevation is 531.00m, the drop is 90m, and the discharge flow rate is 300m 3 / s. Aiming at the above projects, two energy dissipation systems of Example 1 and Comparative Example 1 were used to carry out hydraulic model tests.

[0028] Example 1

[0029] The bottom flow cascaded stilling basin energy dissipation system described in this embodiment includes a three-stage stepped stilling basin 3 arranged at different elevations on the side of the reservoir dam body, an upstream aqueduct 1 leading out the water in the reservoir, The spillway 5 corresponding to the stilling tanks at all levels and the bank diversion channel 6 that introduces th...

Embodiment 2

[0035] The engineering overview of embodiment 2 and comparative example 2 is as follows:

[0036] A power station is built in a narrow river valley, with steep mountains on both sides, and the downstream channel quickly changes from narrow to wide. The elevation of the reservoir entrance is 2136.00m, the elevation of the exit is 2021.00m, the drop is 115m, and the discharge flow is 600m 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.

[0037] Example 2

[0038] The bottom flow cascaded stilling basin energy dissipation system described in this implementation includes a three-level stepped stilling basin 3 arranged at different elevations on the side of the reservoir dam body, an upstream aqueduct 1 leading out the water in the reservoir, each The spillway 5 corresponding to the level stilling basin and the bank diversion channel 6 that introduces the water in the stilling ...

Embodiment 3

[0044] The engineering overview of embodiment 3 and comparative example 3 is as follows:

[0045] A power station is built in a narrow river valley, with steep mountains on both sides, and the downstream channel quickly changes from narrow to wide. The elevation of the reservoir entrance is 1426.00m, the elevation of the exit is 1321.00m, the drop is 105m, and the discharge flow is 1200m 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.

[0046] Example 3

[0047] The bottom flow cascaded stilling basin energy dissipation system described in this implementation includes a three-level stepped stilling basin 3 arranged at different elevations on the side of the reservoir dam body, an upstream aqueduct 1 leading out the water in the reservoir, each The spillway 5 corresponding to the level stilling basin and the bank diversion channel 6 that introduces the water in the stilling...

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Abstract

The invention relates to an underflow type stair stilling pool energy consumption system. The underflow type stair stilling pool energy consumption system comprises multi-level stilling pools which are arranged at different elevations of a lateral mountain of a reservoir dam body in a stair mode, an upstream diversion canal guiding out water in a reservoir, spillways which are corresponding to the stilling pools and shore diversion canals which are used for diverting water in the stilling pool at the lowest elevation to a downstream river channel; downstream ends of the stilling pools are arranged on the same side; side walls at the downstream ends of the stilling pools are provided with overflow weirs. The underflow type stair stilling pool energy consumption system is applicable to narrow river valleys and small flow high water head water conservancy projects with downstream river channels changed from narrow to wide to avoid the stilling pools from being damaged, guarantee the downstream river channel safety and improve the energy consumption rate.

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 that combines stilling pools and bottom flow energy dissipation in narrow river valleys and downstream rivers that change from narrow to wide with high head water conservancy 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 na...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02B8/06
CPCE02B8/06
Inventor 许唯临张建民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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