CN204343255U - Structure of canal system hydraulic engineering through high-fall valley - Google Patents

Abstract

The utility model discloses a structure of canal system hydraulic engineering through high drop valley, which comprises an upstream channel (1) and a downstream channel (2); a high-fall terrain is arranged between the two channels, and a valley (3) lower than the downstream channel is arranged in the middle of the two channels; the valley slope surface (4) at the tail end of the upstream channel positioned on one side of the valley is provided with an energy dissipation fall (5), the starting end of the energy dissipation fall is connected with the tail end of the upstream channel, and the tail end of the energy dissipation fall is provided with a high-level water pool (6); the starting end of the downstream channel positioned at the other side of the valley is provided with a low-level water pool (7), and the low-level water pool is connected with the high-level water pool through an inverted siphon (8). The utility model discloses a structure is domatic setting energy dissipation waterfall of upstream channel, makes the water potential energy lead to the low reaches channel through the inverted siphon again after consuming gradually through energy dissipation waterfall, consequently can cancel the great stilling basin investment of current expense, reduces construction cost. Meanwhile, the problem that the flow state of water flow at the outlet of the inverted siphon pipe in the existing structure is not good is solved.

Description

A structure in which a canal water conservancy project passes through a valley with a high drop

technical field

The utility model relates to a structure for a canal system water conservancy project to pass through a valley with a high drop, and belongs to the technical field of water diversion in the water conservancy project.

Background technique

In the construction of water conservancy projects, water diversion through channels is the most common form used. In the process of channel excavation, river valleys or valley terrain with high drop are often encountered. The traditional method is to directly use inverted siphons to connect channels on both sides of the river valley or valley. The current method has the following problems: due to the large drop between the two sides of the channel, the water head at the bottom of the inverted siphon is relatively large, so it is necessary to install a special stilling pool at the end of the inverted siphon for energy dissipation. With the increase of the drop between the two sides, the scale of the stilling pool It must also be increased accordingly, greatly increasing the stilling pool and making the construction more difficult, and the project cost is also increased accordingly.

Utility model content

The purpose of this utility model is to provide a structure for a canal water conservancy project to pass through high-drop valleys. An energy-dissipating water drop is arranged on the slope of the upstream channel, so that the potential energy of the water is gradually consumed when passing through the energy-dissipating water and then passed through the water. The siphon guides the water from the upstream channel to the downstream channel, so the existing investment in the stilling pool, which is relatively expensive, can be canceled and the construction cost can be reduced.

Technical scheme of the utility model:

A structure in which a canal water conservancy project passes through a high-drop valley, including an upstream channel and a downstream channel; between the two channels is a high-drop terrain with a valley lower than the downstream channel in the middle; the valley slope at the end of the upstream channel on one side of the valley There is an energy-dissipating water drop on the surface, the beginning of the energy-dissipating water drop is connected to the end of the upstream channel, and the end of the energy-dissipating water drop is provided with a high-level pool; the beginning of the downstream channel on the other side of the valley is equipped with a low-level pool, and the low-level pool is connected to the end of the channel. The high-level pools are connected by inverted siphons.

In the aforementioned structure, the energy-dissipating water drop includes a set of steps, and the height of each step is not greater than 1 meter.

In the aforementioned structure, side walls are provided on both sides of the energy-dissipating water drop, and the vertical distance between the edge of each step and the slope of the side wall is greater than 0.5 meters.

In the aforementioned structure, the elevation of the bottom of the high-level pool is higher than the elevation of the lower part of the low-level pool.

In the aforementioned structure, the inverted siphon is a section of pipeline bent downwards, and the inverted siphon is buried below the ground.

Compared with the prior art, the structure of the utility model is to set the energy-dissipating water drop on the slope of the upstream channel, so that the potential energy of the water is gradually consumed when passing through the energy-dissipating water drop, and then the upstream channel water is led to the downstream channel through the inverted siphon , so the existing stilling pool investment, which is relatively expensive, can be canceled and the construction cost can be reduced. At the same time, it also solves the problem of poor water flow at the outlet of the inverted siphon in the existing structure.

Description of drawings

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

The marks in the drawings are: 1-upstream channel, 2-downstream channel, 3-valley, 4-valley slope, 5-energy dissipation water drop, 6-high pool, 7-low pool, 8-inverted siphon, 9 - side walls.

Detailed ways

The utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments, but not as any limitation to the utility model.

A structure in which a canal water conservancy project passes through a valley with a high drop, as shown in Figure 1. It includes an upstream channel 1 and a downstream channel 2; between the two channels is a high-drop terrain with a valley 3 lower than the downstream channel 2 in the middle; it is characterized in that the valley slope 4 at the end of the upstream channel 1 on one side of the valley 3 is set There is an energy-dissipating water drop 5, and the energy-dissipating water drop 5 includes a set of steps, and the height of each step is not more than 1 meter. The starting end of the energy dissipation water drop 5 is connected to the end of the upstream channel 1, and the end of the energy dissipation water drop 5 is provided with a high-level pool 6; the beginning end of the downstream channel 2 located on the other side of the valley 3 is provided with a low-level pool 7, and the low-level pool 7 is connected to the The high-level pools 6 are connected through inverted siphons 8 . Side walls 9 are arranged on both sides of the energy dissipation water drop 5, and the vertical distance between the edge of each step and the slope of the side wall is greater than 0.5 meters. The bottom level of the high level pool 6 is higher than the lower level of the low level pool 7 . The inverted siphon 8 is a downwardly curved pipeline, and the inverted siphon 8 is buried below the ground.

Example

During specific implementation, it is shown in Figure 1. First build a pool at the position where the upstream slope is higher than the downstream channel, and at the same time build a pool at the beginning of the downstream channel. The pool on the upstream slope is higher than the pool at the beginning of the downstream channel, and then dig the pipeline on the valley. , and lay the pipeline in the pipeline laying ditch, and fill the ditch with backfill soil to form an inverted siphon. The two ends of the inverted siphon are respectively connected with the bottom of the pool on both banks. Then build energy-dissipating water falls on the upstream slope. The gradient and structure of energy-dissipating water falls should be calculated and designed according to the actual terrain on site to meet the energy dissipation requirements. Generally speaking, the height of each step should be less than 1 meter. Ditch walls are arranged on both sides of the energy-dissipating water drop to restrict water flow from the slopes on both sides of the energy-dissipating water drop. The vertical distance between the edge of each step and the slope of the side wall should be greater than 0.5 meters, and the waterproof will flow out from both sides of the energy dissipation water drop.

The above are only specific application examples of the utility model, and do not constitute any limitation to the utility model. All technical solutions formed by equivalent replacement or equivalent transformation all belong to the protection scope of the utility model.

Claims (5)

1. A structure in which a canal water conservancy project passes through a high-drop valley, including an upstream channel (1) and a downstream channel (2); the two channels have a high-drop terrain and a valley lower than the downstream channel (2) in the middle ( 3); it is characterized in that: the valley slope (4) at the end of the upstream channel (1) on one side of the valley (3) is provided with an energy dissipation water drop (5), and the starting end of the energy dissipation water drop (5) is connected to the upstream The end of the channel (1) is connected, and the end of the energy dissipation water drop (5) is provided with a high-level pool (6); the beginning of the downstream channel (2) on the other side of the valley (3) is provided with a low-level pool (7), and the low-level pool (7) is connected with the elevated pool (6) via an inverted siphon (8). 2. The structure of the canal water conservancy project passing through high-drop valleys according to claim 1, characterized in that: the energy-dissipating water drop (5) includes a set of steps, and the height of each step is not more than 1 meter. 3. According to the structure of the canal water conservancy project passing through the high-drop valley according to claim 2, it is characterized in that: the energy-dissipating water drop (5) is provided with side walls (9) on both sides, and the distance between the edge of each step and the side wall The vertical distance of the slope is greater than 0.5 meters. 4. The structure of the canal water conservancy project passing through high drop valleys according to claim 1, characterized in that: the elevation of the bottom of the high pool (6) is higher than the elevation of the bottom of the low pool (7). 5. According to claim 3, the structure of the canal water conservancy project passing through high-drop valleys is characterized in that: the inverted siphon (8) is a section of downwardly curved pipeline, and the inverted siphon (8) is buried below the ground.