Energy dissipation structure of diversion tunnel outlet

Abstract

The utility model relates to a diversion tunnel outlet energy dissipation structure. The method is suitable for the technical field of water conservancy and hydropower engineering. The technical problem to be solved by the application is to provide the diversion tunnel outlet energy dissipation structure. According to the technical scheme, a river flowing from the first side of the diversion tunnel to the second side of the diversion tunnel is arranged at an outlet of the diversion tunnel, and the diversion tunnel outlet energy dissipation structure is characterized by comprising an energy dissipation structure body, a flip bucket arranged at the bottom of the outlet of the diversion tunnel and of a triangular prism structure, the overflowing surface of the flip bucket is triangular; and the concrete bottom plate structure is arranged on the outer side of the energy dissipation structure and extends to be connected with the river.

Description

Technical Field

[0001] The utility model relates to the field of water conservancy and hydropower engineering, in particular to an energy dissipation structure at the outlet of a diversion tunnel. Background Art

[0002] Diversion tunnels are a commonly used diversion type in water conservancy and hydropower projects in western mountainous areas. They are widely used. When arranging the diversion tunnel outlet structure, it is necessary to avoid the scouring effect of the overflow at the diversion tunnel outlet, especially when the cover layer on the opposite bank of the diversion tunnel outlet is thick and is the foot of the landslide. The continuous scouring of the foot of the cover layer by the water flow at the diversion tunnel outlet may cause the instability of the opposite bank slope, trigger landslides, block rivers, and cause major geological disasters to the project and the local area. Utility Model Content

[0003] The technical problem to be solved by the utility model is: to provide an energy dissipation structure for a diversion tunnel outlet in view of the above-mentioned existing problems.

[0004] The technical solution adopted by the utility model is: an energy dissipation structure at the outlet of a diversion tunnel, wherein the outlet of the diversion tunnel is provided with a river flowing from a first side of the diversion tunnel to a second side thereof, and is characterized in that it comprises:

[0005] The energy dissipation structure includes a sill arranged at the bottom of the diversion tunnel outlet, the sill is a triangular prism structure, and the flow surface of the sill is a triangle;

[0006] The concrete bottom plate structure is arranged outside the energy dissipation structure and extends to connect with the river.

[0007] Through the above technical means, the triangular prism structure of the ridge is used to change the direction of the water flow at the outlet of the diversion tunnel and reduce the flow rate, thereby reducing the scouring of the opposite bank cover by the water flow at the outlet of the diversion tunnel.

[0008] In some embodiments, the height of the end of the ledge close to the first side of the diversion tunnel is 0 m, and the height of the end of the ledge close to the second side of the diversion tunnel is 2 m, and they are smoothly connected in the middle.

[0009] In some embodiments, the starting line of the ramp forms an angle of 45° with the axis of the diversion tunnel.

[0010] In some embodiments, a first concrete slope protection is provided on a first side of the diversion tunnel exit, and a second concrete slope protection is provided on a second side of the diversion tunnel exit.

[0011] In some embodiments, the concrete floor structure extends for a length of 10 m.

[0012] The beneficial effects of the utility model are:

[0013] 1. The triangular prism-shaped sill can change the direction of part of the water flowing down the diversion tunnel, reducing the risk of high-speed water flowing directly onto the foot of the opposite bank. The sill can also reduce the kinetic energy of the water by lifting part of the water flow and then dropping it into the water surface, thereby reducing the water flow rate and the impact and scouring on the foot of the opposite bank of the river. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the planar structure of this application.

[0015] Figure 2 It is a schematic diagram of the longitudinal structure of this application.

[0016] Figure 3 It is a schematic diagram of the cross-sectional structure of this application.

[0017] Description of reference numerals:

[0018] 1. Diversion tunnel; 2. Overhang; 3. First concrete slope protection; 4. Second concrete slope protection; 5. River; 101. Concrete base plate structure.

[0019] This specification includes references to "one embodiment" or "an embodiment." The appearance of the phrase "in one embodiment" or "in an embodiment" does not necessarily refer to the same embodiment. The particular features, structures or characteristics may be combined in any suitable manner consistent with the present disclosure.

[0020] The term "comprising" is open ended. As used in the appended claims, the term does not exclude additional structures or steps.

[0021] "First," "second," etc. As used herein, these terms act as labels for the nouns that precede them and do not imply any type of ordering (e.g., spatial, temporal, logical, etc.). DETAILED DESCRIPTION

[0022] In order to enable those skilled in the art to better understand the technical solution of the present utility model, the technical solution of the present utility model is further described below in conjunction with specific embodiments.

[0023] Embodiment 1:

[0024] Combination Figures 1 to 3 As shown, this embodiment is an energy dissipation structure for a diversion tunnel outlet. A river 5 is provided at the outlet of the diversion tunnel 1, and the flow direction of the river 5 is from the first side of the diversion tunnel 1 to the second side thereof. Specifically, as Figure 1As shown, in this embodiment, the first side of the diversion tunnel 1 is the left side along the water discharge direction inside the diversion tunnel 1, and the second side of the diversion tunnel 1 is the right side along the water discharge direction inside the diversion tunnel 1. This structure includes an energy dissipation structure and a concrete bottom plate structure 101. The energy dissipation structure includes a sill 2 arranged at the bottom of the outlet of the diversion tunnel 1. The sill 2 is a triangular prism structure. The flow surface of the sill 2 is a triangle and is a straight line along the water flow direction. The concrete bottom plate structure 101 is arranged outside the energy dissipation structure, and the concrete bottom plate structure 101 extends to connect with the river 5.

[0025] The triangular prism-shaped cantilever 2 changes the flow direction of the water flowing down the diversion tunnel 1, and the process of the water flowing up and falling into the water surface will effectively reduce the kinetic energy of the water and reduce the flow rate of the water, thereby reducing the risk of high-speed water flowing directly to the foot of the opposite bank slope and reducing the impact and scouring to the foot of the opposite bank slope of the river 5.

[0026] In some embodiments, the height of the end of the sill 2 close to the first side of the diversion tunnel 1 is 0m, and the height of the end of the sill 2 close to the second side of the diversion tunnel 1 is 2m, and they are smoothly connected in the middle. The slope line of the sill 2 forms an angle of about 45° with the axis of the diversion tunnel 1.

[0027] In some embodiments, a first concrete slope protection 3 is provided on the first side of the outlet of the diversion tunnel 1, and a second concrete slope protection 4 is provided on the second side of the outlet of the diversion tunnel 1. The first concrete slope protection 3 and the second concrete slope protection 4 are used to protect both sides of the embankment 2. The extension length of the concrete bottom plate structure 101 is about 10m.

[0028] Embodiment 2:

[0029] This embodiment is an implementation method of an energy dissipation structure at a diversion tunnel outlet, comprising the following steps:

[0030] (1) Determine the size, position and slope line of the cantilever 2 in the energy dissipation structure at the outlet of the diversion tunnel 1 on the drawing;

[0031] (2) On-site measurement and layout;

[0032] (3) Tie steel bars and erect formwork;

[0033] (4) The bottom plate of the diversion tunnel 1 outlet and the concrete slope protection on both sides are cast integrally.

[0034] The above are all preferred embodiments of the present utility model, and are not intended to limit the protection scope of the present utility model. Therefore, any equivalent changes made based on the structure, shape, and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A diversion tunnel outlet energy dissipation structure, wherein the outlet of the diversion tunnel (1) is provided with a river (5) flowing from a first side of the diversion tunnel (1) to a second side thereof, characterized in that: include: The energy dissipation structure comprises a sill (2) arranged at the bottom of the outlet of the diversion tunnel (1), wherein the sill (2) is a triangular prism structure, and the flow surface of the sill (2) is a triangle; The concrete bottom plate structure (101) is arranged outside the energy dissipation structure and extends to connect with the river (5).

2. The energy dissipation structure at the outlet of a diversion tunnel according to claim 1, characterized in that: The height of the end of the sill (2) close to the first side of the diversion tunnel (1) is 0m, and the height of the end of the sill (2) close to the second side of the diversion tunnel (1) is 2m, and they are smoothly connected in the middle.

3. The energy dissipation structure at the outlet of a diversion tunnel according to claim 1, characterized in that: The starting line of the slope of the cantilever (2) forms an angle of 45° with the axis of the diversion tunnel (1).

4. The energy dissipation structure at the outlet of a diversion tunnel according to claim 1, characterized in that: A first concrete slope protection (3) is provided on the first side of the outlet of the diversion tunnel (1), and a second concrete slope protection (4) is provided on the second side of the outlet of the diversion tunnel (1).

5. The energy dissipation structure at the outlet of a diversion tunnel according to claim 1, characterized in that: The extension length of the concrete floor structure (101) is 10m.

Images