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Composite fishway structure for narrow river valley terrain dam

A fishway and river valley technology, applied in the field of composite fishway structure, can solve the problems of cumbersome operation control of fishway outlet gates, large excavation or concrete engineering, and large investment in fishway projects, achieving compact structure and reduced opening. The effect of engineering excavation and small space occupation

Pending Publication Date: 2018-02-16
POWERCHINA CHENGDU ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main disadvantages of this structure are: 1. The outlets of the fishways are all arranged upstream, and the length along the river is relatively long. The corresponding excavation or concrete works are relatively large, and the investment in the fishway project is relatively large; 2. The number of fishway outlets is relatively large. There are many, and it is necessary to open and close each gate in time according to the upstream water level. When the upstream water level changes greatly and frequently, the operation control of the fishway exit gate is also relatively cumbersome.
The main disadvantages of this structure are: 1. In order to meet the requirements of water level variation, multiple fishway outlets need to be set up along the dam axis in the upstream, which cannot be applied to retaining dams in narrow valleys; 2. Since each fishway outlet needs to be equipped with 1 It is necessary to open and close each gate in time according to the upstream water level. When the upstream water level fluctuates greatly and frequently, the operation control of the fishway exit gate is also relatively cumbersome.

Method used

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  • Composite fishway structure for narrow river valley terrain dam
  • Composite fishway structure for narrow river valley terrain dam
  • Composite fishway structure for narrow river valley terrain dam

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The main structural features of this embodiment:

[0034] a. Fishway outlets are arranged in two rows combined with retaining dams. The axes of fishway outlets in the same row are coincident. The floor elevations of the upper and lower fishway outlets differ by 2h. The height difference of the bottom plate of the fishway outlet is h;

[0035] b. The exit of the same row of fishways shares a gate slot. The elevation of the bottom of the gate slot is equal to the elevation of the bottom plate of the lowest level of fishways in the row. The exit shares a gantry crane, and the gantry crane moves between the exits of the two rows of fishways through the gantry rail;

[0036] c. The outlets of two horizontally adjacent fishways are connected by connecting channels arranged behind the retaining dam.

[0037] The beneficial effects of this embodiment are:

[0038] a. The combined arrangement of the fishway exit and the retaining dam can greatly save the amount of foundation ...

Embodiment 2

[0050] The main structural features of this embodiment:

[0051] a. The fishway exits are also arranged in two rows combined with the retaining dams. The axes of the fishway exits in the same row are coincident. The floor elevations of the upper and lower fishway exits differ by 2h. The two rows of fishway exits are staggered in elevation. There is a difference of h in height between the bottom plates of fishway outlets;

[0052] b. The fishway exit of the same column shares a flat gate, the height of the gate is [2n-1]×h, and it is opened and closed by the hoist bent frame and cable arranged on the top of the retaining dam, and the bottom elevation of the fishway exit of the lowest level is - Gate slot bottom elevation ≥ gate height = [2n-1]×h;

[0053] c. The outlets of two horizontally adjacent fishways are connected by connecting channels arranged behind the retaining dam.

[0054] The beneficial effects of this embodiment are:

[0055] a. The combined arrangement of th...

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Abstract

The invention discloses a composite fishway structure for a narrow river valley terrain dam, and belongs to the technical field of water conservancy and hydropower engineering accessory building design and construction. The composite fishway structure for the narrow river valley terrain dam compact in structure and small in occupied space is provided. The composite fishway structure comprises a concrete high dam provided with multiple fishway outlets in an upstream side dam body and further comprises a migration and transition channel and multiple sets of water passing culverts; all the fishway outlets are formed in the concrete high dam in the vertical direction at intervals; all sets of water passing culverts are connected with all the fishway outlets in a one to one corresponding mode respectively after passing through the concrete high dam in the water flowing direction, the downstream side ports of all the sets of water passing culverts are communicated with the corresponding partof the migration and transition channel of which the central line is perpendicular to the water flowing direction separately, and the composite fishway structure is communicated with a water body atthe downstream side through the migration and transition channel.

Description

technical field [0001] The invention relates to a composite fishway structure, in particular to a composite fishway structure used on dams with narrow valley terrain, and belongs to the technical field of design and construction of auxiliary buildings of water conservancy and hydropower projects. Background technique [0002] A fishway is a channel for fish to migrate. In popular language, some fishes have the habit of migrating from the lower reaches of the river to the upper reaches of the river to spawn. When the river is cut off due to human reasons such as the construction of a dam, the passage for the fish to migrate upstream will be destroyed. . In order to protect the habits of fish, it is necessary to build an artificial tank across the dam as a passage for fish to migrate, which is called a fishway. The water flow enters the fishway from the upstream and flows out of the fishway from the downstream, but the fish enters the fishway from the downstream and swims ou...

Claims

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Application Information

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IPC IPC(8): E02B8/08
CPCE02B8/08
Inventor 张公平唐忠敏佘鸿翔陈相楠
Owner POWERCHINA CHENGDU ENG
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