Slope protection energy dissipation structure

Abstract

The utility model belongs to the technical field of water conservancy project slope protection, and particularly relates to a slope protection energy dissipation structure which comprises a slope protection body, the slope protection body is divided into multiple stages of slopes in the water flow pouring direction, a water drainage channel is arranged in each stage of slope, and the water drainage channels of every two adjacent stages of slopes are communicated. A water outlet communicated with the drainage channel is formed in the end face of the downflow end of the lowest slope; the top surface of each stage of slope is provided with a water inlet channel communicated with the water drainage channel, each water inlet channel at least comprises two associated inclined vertical channels, lower openings of the two associated vertical channels are close to each other or communicated with each other, upper openings of the two associated vertical channels are far away from each other, and the upper openings of the two associated vertical channels are close to each other or communicated with each other. Water flows out of the two associated vertical channels and then is subjected to hedging energy dissipation; the slope protection structure has the advantages that rainwater and dam overtopping water flow overflow the slope protection structure, part of the water flow forms step-by-step falling flow, the water flow speed and kinetic energy are reduced, and scouring of the water flow to the slope protection structure is relieved; a part of water flow is guided into the drainage channel through the slope water inlet channel, and is guided to the downstream of the dam after energy dissipation in the drainage channel, so that the scouring of the water flow to the slope protection is reduced, and the safety of the dam is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of slope protection of water conservancy projects, and specifically relates to a slope protection energy dissipation structure. Background Art

[0002] At present, the slope protection of reservoir dams (except arch dams) and embankments on the backwater side usually adopts dry-cut stone, precast concrete blocks, ecological blocks or turf slope protection. The slope protection environment is very harsh, especially for mountain embankments. The floods in mountainous rivers rise and fall suddenly, which is easy to overflow the dam in a short time. Most of the embankments have hardened water-facing sides and roads. The overflow water flows over the dam top and scours the downstream slope protection, which is easy to cause damage to the downstream slope protection and the soil under the slope protection. In severe cases, it may even cause dam failure, resulting in major safety accidents.

[0003] Based on this, this case is brought forward. Utility Model Content

[0004] The utility model aims to provide a slope protection energy dissipation structure to extend the service life of the slope protection in a harsh environment, and at the same time can withstand short-duration flooding without dam collapse, thereby ensuring the safety of the dam.

[0005] To achieve the above purpose, the technical solution of the utility model is as follows:

[0006] A slope protection energy dissipation structure, comprising a slope protection, wherein the slope protection is divided into multiple slopes along the pouring direction of water flow, a drainage channel is arranged inside each slope, the drainage channels of the upper and lower adjacent slopes are connected, and a water outlet connected to the drainage channel is arranged at the downstream end face of the lowest slope;

[0007] The top surface of each level of the slope is provided with a water inlet channel connected to the drainage channel, and each of the water inlet channels includes at least two associated oblique vertical channels, the lower openings of the two associated vertical channels are close to or connected to each other, and the upper openings of the two associated vertical channels are far away from each other, and water flows out of the two associated vertical channels to offset and dissipate energy.

[0008] Furthermore, a plurality of water retaining protrusions are provided on the bottom surface of the drainage channel.

[0009] Furthermore, the water retaining protrusion is in the shape of a semi-cylinder which is arranged perpendicular to the water flow direction and lies flat.

[0010] Furthermore, the space of the drainage channel in the area where the water inlet channel is set is larger than the space at other locations.

[0011] Furthermore, a flow nose is provided at the top surface of the downstream end of each slope.

[0012] Furthermore, a notch is provided on the top surface of each slope, and the notch is located between the flow nose sill and the water inlet channel area.

[0013] The advantages of the utility model are:

[0014] 1. When rainwater and overflow water flow over the slope protection, part of the water flow forms a step-by-step drop flow, which reduces the flow velocity and kinetic energy, and reduces the scouring of the slope protection by the water flow; part of the water flow is diverted into the discharge channel through the slope inlet channel, and then diverted to the downstream of the dam after energy dissipation in the discharge channel, reducing the scouring of the slope protection by the water flow, thereby ensuring the safety of the dam;

[0015] 2. After being cast, the slope protection structure presents a wave shape, which has a certain aesthetic appeal and can be opened as a scenic spot during non-flood periods. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The schematic diagram of the slope protection structure in the embodiment, in which the arrows indicate the direction of water flow;

[0017] Figure 2 for Figure 1 A magnified schematic diagram of part A in FIG.

[0018] Figure 3 Schematic diagram of water flow counteraction and energy dissipation in the water inlet channel of the slope protection structure in the embodiment;

[0019] Figure 4 It is a schematic diagram showing that the lower openings of two associated vertical channels of the water inlet channel in the embodiment are close to each other;

[0020] Figure 5 It is a schematic diagram showing that the lower openings of two associated vertical channels of the water inlet channel in the embodiment are connected to each other;

[0021] Description of symbols

[0022] 1- sloping nose; 2- notch; 3- water inlet channel; 4- water retaining protrusion; 5- water discharge channel; DETAILED DESCRIPTION

[0023] The present invention is further described in detail below in conjunction with the embodiments. It should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc. used in the text to indicate directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0024] This embodiment proposes a slope protection and energy dissipation structure, which is integrally cast by concrete. By adjusting the admixtures of the concrete, it can meet certain antifreeze and compressive strength indicators and can withstand the erosion of water flow for a longer period of time.

[0025] like Figures 1 to 3 As shown, the slope protection is divided into multiple slopes along the pouring direction of water flow, and a drainage channel 5 is provided inside each slope. The drainage channels 5 of the upper and lower adjacent slopes are connected, and a water outlet connected to the drainage channel 5 is provided at the downstream end surface of the lowest slope. A water inlet channel 3 connected to the drainage channel 5 is provided on the top surface of each slope, and each of the water inlet channels 3 includes at least two associated oblique vertical channels, and the lower openings of the two associated vertical channels are close to each other (such as Figure 4 as shown) or interconnected (as shown Figure 5 As shown in FIG. 1 , the upper openings of the two associated vertical channels are far from each other. Part of the water falling from the upstream enters the water inlet channel 3. After the water flows out of the two associated vertical channels, it can offset and dissipate energy before entering the drainage channel 5. The drainage channel 5 is filled with water, which increases the weight of the slope protection and improves the anti-slip stability. On the other hand, since part of the water enters the drainage channel 5, the scouring ability of the water flow on the slope protection surface is reduced. Since only part of the water enters the drainage channel 5 and offsets and dissipates energy when entering the drainage channel 5, it also ensures that the scouring force of the water flow on the side wall of the drainage channel 5 will not be very large.

[0026] As a preference, in this embodiment, a plurality of water retaining protrusions 4 are provided on the bottom surface of the drainage channel 5. The water retaining protrusions 4 are semi-cylindrical and arranged perpendicular to the water flow direction and laid flat. The water in the upper slope enters the drainage channel 5 of the lower slope through the drainage channel 5. After the water rushing in is blocked and dissipated by the water retaining protrusions 4, the flow rate is weakened. The drainage channel 5 not only receives the water falling from the water inlet channel 3, but also receives the water rushing in from the drainage channel 5 of the upper slope. In order to provide a larger energy dissipation space, the drainage channel 5 of this embodiment is located in the area where the water inlet channel 3 is set, and the space is larger than the space at other positions.

[0027] like Figure 1 and Figure 2 As shown, a curved flow nose 1 is provided at the top surface of the downstream end of each level of the slope, which can lift the water flow to dissipate energy, form a drop flow step by step, and reduce the scouring of the slope by the water flow. At the same time, a recess 2 is also provided at the top surface of each level of the slope, and the recess 2 is located between the flow nose 1 and the water inlet channel 3 area, and the two sides of the recess 2 are connected to the flow nose 1 and the water inlet channel 3 area by a streamlined curved surface. Water is easily accumulated at the recess 2, and part of the upstream raised water falls into this area. The accumulated water can protect the surface of the slope and reduce the scouring of the water flow. At the same time, the raised water falls into the recess 2, and the accumulated water can also play a role in energy dissipation.

[0028] The specific description of the water flow energy dissipation process of the slope protection is as follows:

[0029] Rainwater and overflow water flow over the nose of the upper slope 1, and then fall to the next slope after the flow, forming a step-by-step drop flow, reducing the flow velocity and kinetic energy, and reducing the scouring of the slope protection by the water flow;

[0030] Part of the water flow falling to the next slope falls into the notch 2, forming water accumulation at the notch 2, dissipating the energy of the falling water flow, and the water flow falling into the notch 2 flows over the nose 1 and continues to fall; part of the water flows into the drainage channel 5 through the water inlet channel 3, and part of the water that does not directly fall into the water inlet channel 3 flows into the water inlet channel 3 through the slope protection surface (at the same time, rainwater can also enter the water inlet channel 3 in this way), and after the counter-energy dissipation of the water inlet channel 3, the convex energy dissipation of the drainage channel 5, and the front and back and left and right vibration energy dissipation between the water flows, it enters the drainage channel 5 of the next slope to continue dissipating energy;

[0031] Through the above-mentioned multiple forms of energy dissipation, the scouring of water on the slope protection can be reduced, thus ensuring the safety of the dam.

[0032] The above embodiments are only used to explain the concept of the present invention, rather than to limit the protection of the present invention. Any non-substantial changes to the present invention using this concept shall fall within the protection scope of the present invention.

Claims

1. A slope protection and energy dissipation structure, comprising a slope protection, characterized in that: The slope protection is divided into multiple slopes along the pouring direction of water flow, and a drainage channel is arranged inside each slope. The drainage channels of the upper and lower adjacent slopes are connected, and a water outlet connected to the drainage channel is arranged at the downstream end face of the lowest slope; The top surface of each level of the slope is provided with a water inlet channel connected to the drainage channel, and each of the water inlet channels includes at least two associated oblique vertical channels, the lower openings of the two associated vertical channels are close to or connected to each other, and the upper openings of the two associated vertical channels are far away from each other, and water flows out of the two associated vertical channels to offset and dissipate energy.

2. A slope protection and energy dissipation structure as claimed in claim 1, characterized in that: The bottom surface of the drainage channel is provided with a plurality of water retaining protrusions.

3. A slope protection and energy dissipation structure as claimed in claim 2, characterized in that: The water retaining protrusion is in the shape of a semi-cylinder which is arranged perpendicular to the water flow direction and is placed flat.

4. A slope protection and energy dissipation structure as claimed in claim 1, characterized in that: The space of the drainage channel in the area where the water inlet channel is set is larger than the space at other positions.

5. The slope protection and energy dissipation structure according to claim 1, characterized in that: A nose ramp is provided on the top surface of the downstream end of each level of the slope.

6. A slope protection and energy dissipation structure as claimed in claim 5, characterized in that: A notch is arranged on the top surface of each slope, and the notch is located between the nose sill and the water inlet channel area.

Images