Overflow type flexible floodway flood discharge and energy dissipation structure

Abstract

The utility model discloses an overflow type flexible floodway flood discharge energy dissipation structure which comprises a protective layer cloth liner laid on the downstream face of a water retaining dam, the left side and the right side of the protective layer cloth liner are each provided with a flow guide wing wall fixed to the downstream face of the water retaining dam, and a plurality of water stopping energy dissipation ridges are evenly arranged between the two flow guide wing walls at intervals from top to bottom. And anti-impact gabion net gabions filled with ripraps are arranged at the lower ports of the two flow guide wing walls. The water retaining dam is convenient to install, low in construction cost and high in reliability, and in the flood discharge process of flood prevention and control of small and medium-sized reservoirs, the flood discharge speed is reduced, and damage to the dam body of the water retaining dam is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of emergency flood discharge of water conservancy facilities, and in particular relates to an overflowing flexible flood discharge channel flood discharge and energy dissipation structure. Background Art

[0002] In recent years, with the development of my country's economy and the country's emphasis on flood prevention and emergency rescue technologies, small and medium-sized reservoirs and dams may face severe flooding during certain flood seasons, and the designed spillway discharge volume may be less than the reservoir inflow. Therefore, it is necessary to install emergency spillways on existing dams. These spillways are located along the backwater surface of the dam, which has a large slope. Floodwaters flowing down these emergency spillways exert a strong impact force. If floodwaters are not blocked during the discharge of these flexible spillways, their flow rate will accelerate. If the reservoir is high, the water flowing to the bottom of the dam may reach a velocity of more than ten meters per second, causing significant damage. This requires the construction of a robust force dissipation system at the bottom of the spillway, which requires significant investment. Adding several barriers to slow the flow of water during the flood discharge process can greatly reduce the destructive effect of the water flow, thereby reducing the investment in force dissipation systems. Therefore, if a few barriers are added during the flood discharge in the emergency flood discharge channel to slow down the discharge speed of the water flow, the destructive effect of the water flow will be greatly reduced, and the investment in the energy dissipation project will be reduced accordingly. Utility Model Content

[0003] In order to solve the deficiencies in the prior art, the utility model provides an overflowing flexible flood discharge channel flood discharge and energy dissipation structure which is easy to install, has high safety and reliability, low cost and good deceleration and energy dissipation effect.

[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions: an overflowing flexible spillway flood discharge and energy dissipation structure, including a protective layer of cloth laid on the back water surface of the retaining dam, a diversion wing wall fixed on the back water surface of the retaining dam is provided on the left and right sides of the protective layer of cloth, a number of water-retaining energy dissipation ridges are evenly spaced from top to bottom between the two diversion wing walls, and anti-collision gabion net stone cages equipped with riprap are provided at the lower ends of the two diversion wing walls.

[0005] Each diversion wing wall includes a number of diversion supports arranged in sequence from top to bottom along the back water surface of the dam. Each diversion support is fixed on the back water surface of the dam by a positioning steel drill inserted into the dam. Each diversion support is vertically provided with a diversion support rod. Each diversion support is fixed with a horizontal pressure rod pressed on the protective layer pad in the horizontal direction, and a longitudinal pressure rod is provided at the inner end of the horizontal pressure rod.

[0006] Each Yongshui energy dissipation dam includes a waterproof canvas arranged above the protective layer pad. The waterproof canvas is an isosceles trapezoid that is narrow at the top and wide at the bottom. The upper side of the waterproof canvas is bent and fixed to the transverse pressure rod and the longitudinal pressure rod by screws and T-shaped pressure plates. The lower side of the waterproof canvas is bent upward and connected to the diversion support rod through a suspension rope.

[0007] In two adjacent Yongshui energy dissipation sills, the lower end of the waterproof canvas of the upper Yongshui energy dissipation sill covers the upper end of the Yongshui energy dissipation sill located at the lower part.

[0008] By adopting the above technical solution, the present invention has the following technical effects compared with the prior art:

[0009] The upper ends of the two diversion wing walls of the utility model are connected with the spillway of the emergency buoyancy dam (water retaining sub-dike) arranged on the top of the water retaining dam; the back surface of the water retaining dam is paved with a protective layer of mat cloth located between the two diversion wing walls.

[0010] The Yongshui energy dissipation dam is an isosceles trapezoidal waterproof canvas. The upper side is pressed on the transverse and longitudinal pressure bars with screws and T-shaped pressure plates. The lower side is bent upward and hung on the upper part of the diversion support rod with a rope. The lower part of the waterproof canvas forms a flexible pocket-shaped Yongshui dam, which delays the discharge of water and reduces the destructive effects of floods.

[0011] After passing through the process of multiple levels of water retention and water drops in the water energy dissipation sill, the kinetic energy of the discharged water will be greatly weakened. When it reaches the bottom of the spillway, its flow rate is only 25% of the smooth discharge. Compared with the smooth discharge, the energy dissipation project at the bottom of the spillway can be greatly simplified. Only simple anti-collision gabion net stone cages are needed to meet safety needs, and the project investment can also be greatly reduced.

[0012] In order to improve the stability of the anti-collision gabion mesh cage, the anti-collision gabion mesh cage can be connected to the diversion support at the lower end of the two diversion wing walls through iron chains.

[0013] In summary, the utility model is easy to install, has low construction cost and high reliability. In the flood discharge process of small and medium-sized reservoirs for flood prevention and flood relief, it weakens the speed of the flood flow and avoids damage to the dam body. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 for Figure 1 A schematic diagram of the enlarged structure of the Zhongyong water energy dissipation sill;

[0016] Figure 3 Schematic diagram of the waterproof canvas fixed on the transverse pressure rod and the longitudinal pressure rod. DETAILED DESCRIPTION

[0017] like Figure 1-Figure 3 As shown, the overflow type flexible spillway flood discharge and energy dissipation structure of the utility model includes a protective layer pad 11 laid on the back water surface of the retaining dam 1, and a diversion wing wall 2 fixed to the back water surface of the retaining dam is provided on the left and right sides of the protective layer pad 11; a plurality of water-retaining energy dissipation ridges 4 are evenly spaced from top to bottom between the two diversion wing walls 2, and anti-collision gabion net stone cages 5 equipped with riprap are provided at the lower ends of the two diversion wing walls 2.

[0018] Each diversion wing wall 2 includes a number of diversion supports 12 arranged in sequence from top to bottom along the back water surface of the water retaining dam 1. Each diversion support 12 is fixed to the back water surface of the water retaining dam 1 by a positioning steel drill 13 inserted into the water retaining dam 1. Each diversion support 12 is vertically provided with a diversion support rod 14. Each diversion support 12 is fixed with a horizontal pressure rod 15 pressed on the protective layer pad 11 in the horizontal direction, and a longitudinal pressure rod 16 is provided at the inner end of the horizontal pressure rod 15.

[0019] Each water-dissipating barrier 4 includes a waterproof canvas 23 disposed above the protective layer pad 11. The waterproof canvas 23 is an isosceles trapezoid that is narrow at the top and wide at the bottom. The upper side of the waterproof canvas 23 is bent and fixedly pressed onto the transverse pressure rod 15 and the longitudinal pressure rod 16 by screws 24 and T-shaped pressure plates 25. The lower side of the waterproof canvas 23 is bent upward and connected to the diversion support rod 14 by a suspension rope 26.

[0020] In two adjacent water-retaining energy dissipation sills 4 , the lower end of the waterproof canvas 23 of the upper water-retaining energy dissipation sill 4 covers the upper end of the water-retaining energy dissipation sill 4 located at the lower end.

[0021] Compared with the prior art, the present invention has the following technical effects:

[0022] The upper ends of the two diversion wing walls 2 of the present invention are connected to the spillway of the emergency buoyancy dam (water retaining sub-dike) arranged on the top of the water retaining dam 1; the back surface of the water retaining dam 1 is paved with a protective layer of mat cloth 11 located between the two diversion wing walls 2.

[0023] The water dissipation dam 4 is an isosceles trapezoidal waterproof canvas 23, the upper side of which is pressed on the transverse pressure rod 15 and the longitudinal pressure rod 16 by screws 24 and T-shaped pressure plates 25. The lower side is bent upward and hung on the upper part of the diversion support rod 14 by a suspension rope 26. The lower part of the waterproof canvas 23 forms a flexible pocket-shaped water dissipation dam, which delays the discharge of water and reduces the destructive effects of floods.

[0024] After passing through the process of multiple levels of water retention and water drops at the water dissipation ridge 4, the kinetic energy of the discharged water will be greatly weakened. When it reaches the bottom of the spillway, its flow rate is only 25% of that of smooth discharge. Compared with smooth discharge, the energy dissipation project at the bottom of the spillway can be greatly simplified. Only a simple anti-collision gabion mesh stone cage 5 is needed to meet safety needs, and the project investment can also be greatly reduced.

[0025] In order to improve the stability of the anti-collision gabion mesh stone cage 5, the anti-collision gabion mesh stone cage 5 can be connected to the diversion support 12 at the lower end of the two diversion wing walls 2 by an iron chain. The hanging rope 26 plays the effect of bending the lower side of the waterproof canvas 23 upwards to form a water retaining edge.

[0026] The above two embodiments do not impose any formal restrictions on the shape, material, structure, etc. of the utility model. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the utility model shall fall within the scope of protection of the technical solution of the utility model.

Claims

1. Overflow type flexible spillway flood discharge and energy dissipation structure, characterized by: It includes a protective layer mat cloth laid on the back water surface of the retaining dam, a diversion wing wall fixed on the back water surface of the retaining dam is provided on the left and right sides of the protective layer mat cloth, a number of water-retaining energy dissipation sills are evenly spaced from top to bottom between the two diversion wing walls, and anti-collision gabion net stone cages equipped with riprap are provided at the lower ends of the two diversion wing walls.

2. The overflow type flexible spillway flood discharge and energy dissipation structure according to claim 1 is characterized in that: Each diversion wing wall includes a number of diversion supports arranged in sequence from top to bottom along the back water surface of the dam. Each diversion support is fixed on the back water surface of the dam by a positioning steel drill inserted into the dam. Each diversion support is vertically provided with a diversion support rod. Each diversion support is fixed with a transverse pressure rod in the horizontal direction, and a longitudinal pressure rod is provided at the inner end of the transverse pressure rod.

3. The overflow type flexible spillway flood discharge and energy dissipation structure according to claim 2 is characterized in that: Each Yongshui energy dissipation dam includes a waterproof canvas arranged above the protective layer pad. The waterproof canvas is an isosceles trapezoid that is narrow at the top and wide at the bottom. The upper side of the waterproof canvas is bent and fixed to the transverse pressure rod and the longitudinal pressure rod by screws and T-shaped pressure plates. The lower side of the waterproof canvas is bent upward and connected to the diversion support rod through a suspension rope.

4. The overflow type flexible spillway flood discharge and energy dissipation structure according to claim 3 is characterized in that: In two adjacent Yongshui energy dissipation sills, the lower end of the waterproof canvas of the upper Yongshui energy dissipation sill covers the upper end of the Yongshui energy dissipation sill located at the lower part.

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