CN214993584U

CN214993584U - Overflow weir with water quality purification, ecological flow discharge and fish passing functions

Info

Publication number: CN214993584U
Application number: CN202120810290.1U
Authority: CN
Inventors: 邢宝龙; 王鹏; 侯晓辉; 宋文超; 石琳; 韩亚萍; 郭亚男; 陈伟玉; 邰肇悦; 范磊; 徐吉平; 崔康成; 罗驰
Original assignee: Henan Water and Power Engineering Consulting Co Ltd
Current assignee: Henan Water and Power Engineering Consulting Co Ltd
Priority date: 2021-04-20
Filing date: 2021-04-20
Publication date: 2021-12-03
Anticipated expiration: 2031-04-20

Abstract

The utility model discloses an overflow weir with water quality purification, ecological flow discharge and fish passing functions, which comprises an upstream weir body and a downstream weir body; the upstream weir body is a streamline structure built by concrete, the downstream weir body is built by a plumbous gabion filled with porous media, a plurality of stages of fish passing channels which are sequentially connected end to end are arranged on the surface of the upstream weir body at intervals, the top connecting line of the fish passing channels is streamline, and an anti-seepage blanket covers the fish passing channels. Compared with the traditional overflow weir only having a single water retaining function, the utility model has more diverse functions, the upstream weir body of the streamline structure can improve the water passing capacity, the multistage fish passing channel arranged on the downstream weir body has certain energy dissipation effect, the scouring on the bottom of the downstream river can be reduced, more space can be provided for the migration of fishes, and the water quantity is reduced; the downstream weir body is constructed by a lead wire gabion with a porous medium inside, so that the water body purifying capacity of the weir body is improved, and the weir body has a good application value in practical engineering.

Description

Overflow weir with water quality purification, ecological flow discharge and fish passing functions

Technical Field

The utility model relates to an overflow weir especially relates to an overflow weir with quality of water purifies, ecological flow is released and is crossed fish function.

Background

A "weir" is an obstacle across a river that can alter the characteristics of the water flow. Generally, the weir is smaller than a dam, water can be accumulated to form a pool behind an obstacle and can pass through the top to be reserved downstream after the pool is full, so that the weir has the function of stopping up the water level and further storing water, and is widely applied to hydraulic engineering. Hydraulically, a "weir" can be generally divided into a thin-walled weir, a utility weir, and a wide-top weir.

In recent years, with the development of economy, the disadvantages of the weir arranged in the river channel are more and more prominent, which mainly includes: 1. the upstream and downstream river channels are spatially blocked by the weir, making the migration of aquatic animals very difficult. 2. The traditional weir is generally of a masonry or reinforced concrete structure, the dam body has no gap, the biomembrane covers a small amount of the dam body, and the retention time of water flow in the dam body is almost zero, so that the water quality purification function is omitted. 3. The water retaining surface of the upstream of the traditional weir body is generally of a vertical structure and is not streamline, and the flood discharge capacity is poor. In order to solve the problems, the weir needs to be changed from the structure of the weir, so that the weir has the traditional water stopping function, a channel needs to be reserved for the migration of aquatic animals, the water body can be purified at a small flow, and the water environment quality is improved.

Disclosure of Invention

An object of the utility model is to provide an overflow weir with quality of water purifies, ecological flow is released and is crossed fish function to the problem that current weir exists.

In order to achieve the above purpose, the utility model can adopt the following technical proposal:

the overflow weir with the functions of water quality purification, ecological flow discharge and fish passing comprises an upstream weir body and a downstream weir body; the upstream weir body is of a streamline structure built by concrete, the downstream weir body is built by a lead wire gabion filled with porous media, a plurality of stages of fish passing channels which are sequentially connected end to end are arranged on the surface of the downstream weir body at intervals, the top connecting line of the fish passing channels is streamline, and the fish passing channels are covered with anti-seepage blankets.

The ratio of the width of the upstream weir body to the height of the elytrigia repens is 3: 1-5: 1; the ratio of the width of the downstream weir body to the weir height is 10: 1-20: 1.

The depth of the fish passing channels is 0.5-1.0 m, and the height difference of two adjacent fish passing channels is 0.05-0.1 m.

The width of the opening connecting two adjacent fish channels is 1-1.5 m.

The longitudinal slopes of the fish passing channels are all gentle slopes of 1-2 per mill.

Planting soil for planting aquatic plants is covered in the fish passing channel.

The utility model has the advantages of compare in the traditional overflow weir that only has single manger plate function, the utility model discloses an overflow weir function is more various:

1. the upstream weir body with the streamline structure can improve the water passing capacity, and the multi-stage fish passing channels arranged on the downstream weir body have certain energy dissipation effect, so that the scouring on the downstream river bottom can be reduced;

2. the gradient and roughness of each level of fish passing channel are small, so that a certain water depth and a small flow speed are ensured in the fish passing channel, further more space is provided for fish migration, and water quantity leakage during water storage can be reduced;

3. the downstream weir body is constructed by a plumbum gabion with a porous medium inside, so that the attachment area of a biological film and the hydraulic retention time are increased, the water body purifying capacity of the weir body is further improved, and the weir body has a good application value in practical engineering.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a top view structural diagram of fig. 1.

Fig. 3 is a cross-sectional view of fig. 1.

Detailed Description

The present invention will be described in more detail below with reference to the accompanying drawings so as to facilitate understanding for those skilled in the art.

It should be understood by those skilled in the art that the present embodiment is only for explaining the technical principle of the present application, and is not intended to limit the scope of protection of the present application. Although the components in the drawings are illustrated in a certain proportional relationship, the proportional relationship is not constant, and those skilled in the art can make modifications as required to adapt to specific applications, and the modified embodiments will still fall within the scope of the present application.

As shown in fig. 1-3, have the overflow weir that quality of water purifies, ecological flow is released and is crossed the fish function, build in river course 101, its weir body height generally is between 0.5~2m, wherein:

the upstream weir body 1 is a streamline structure built by concrete, and the ratio of the width to the height of the upstream weir body is 3: 1-5: 1;

the downstream weir body 2 is constructed by a lead wire gabion filled with porous media (such as volcanic rocks), and the ratio of the width to the weir height is 10: 1-20: 1; the surface of the downstream weir body 2 is provided with a plurality of stages of fish passing channels 2.1 at intervals, and the fish passing channels 2.1 at all stages are sequentially connected through openings 2.2 (the width is 1-1.5 m) at the head and the tail to form an S-shaped structure; the top connecting line of each level of fish passing channel 2.1 is also streamline; the depth of each level of fish passing channel is 0.5-1.0 m, the longitudinal slope is a gentle slope with the gradient of 1-2 per mill, and the height difference of two adjacent fish passing channels is 0.05-0.1 m; an anti-seepage blanket 2.3 with certain water permeability is covered on the fish passing channel 2.1 (the side wall and the top), planting soil 2.4 with certain thickness is covered in the fish passing channel, and aquatic plants with certain density and water quality purification function can be planted on the planting soil.

The water level in the river channel gradually rises under the interception of the overflow weir, exceeds the height of the overflow weir and then passes through the upstream weir body 1, enters the fish channel 2.1 from the upstream overflow port 2.5, and then passes through the fish channels at all levels in sequence.

Claims

1. An overflow weir with water quality purification, ecological flow discharge and fish passing functions comprises an upstream weir body and a downstream weir body; the method is characterized in that: the upstream weir body is of a streamline structure built by concrete, the downstream weir body is built by a lead wire gabion filled with porous media, a plurality of stages of fish passing channels which are sequentially connected end to end are arranged on the surface of the downstream weir body at intervals, the top connecting line of the fish passing channels is streamline, and the fish passing channels are covered with anti-seepage blankets.

2. The overflow weir with water purification, ecological flow discharge and fish passing functions as claimed in claim 1, wherein: the ratio of the width of the upstream weir body to the height of the elytrigia repens is 3: 1-5: 1; the ratio of the width of the downstream weir body to the weir height is 10: 1-20: 1.

3. The overflow weir with water purification, ecological flow discharge and fish passing functions as claimed in claim 1, wherein: the depth of the fish passing channels is 0.5-1.0 m, and the height difference of the two adjacent fish passing channels is 0.05-0.1 m.

4. The overflow weir with water purification, ecological flow discharge and fish passing functions as claimed in claim 1, wherein: the width of an opening connecting the two adjacent fish passing channels is 1-1.5 m.

5. The overflow weir with water purification, ecological flow discharge and fish passing functions as claimed in claim 1, wherein: the longitudinal slopes of the fish passing channels are all gentle slopes of 1-2 per mill.

6. The overflow weir with water purification, ecological flow discharge and fish passing functions as claimed in claim 1, wherein: planting soil for planting aquatic plants is covered in the fish passing channel.