Anti-scour stable structure of overflow type floodway

Abstract

The utility model discloses an anti-scour stable structure of a spill type floodway, which comprises two bilaterally symmetrical flow guide wing walls arranged along the downstream surface of a retaining dam, and a protective layer cloth liner positioned between the two flow guide wing walls is paved on the downstream surface of the retaining dam. The emergency flexible spillway is ensured to be capable of defending the impact effect of overflowing and draining flood on the diversion wing wall and the bottoming protective layer cloth liner, so that the overflow and flood discharge of a reservoir can be safely and smoothly completed.

Description

Technical Field

[0001] The utility model belongs to the technical field of emergency flood discharge of water conservancy facilities, and particularly relates to an anti-scour stability structure of an overflow type flood discharge channel. Background Art

[0002] In recent years, with the development of my country's economy and the country's emphasis on flood prevention and rescue technology, the designed spillway discharge volume of small and medium-sized reservoir dams may be less than the reservoir inflow due to the large flood during the flood season of a certain year. Therefore, it is necessary to set up an emergency spillway on the existing dam. The emergency spillway is set along the back water surface of the dam. The back water surface has a large slope, and the flood has a strong impact force when it flows down along the emergency spillway. Therefore, the stability of the emergency spillway needs to be well set to ensure the stability of the emergency spillway during the flood discharge process. Utility Model Content

[0003] In order to solve the deficiencies in the prior art, the utility model provides an overflow type spillway anti-scour stability structure which has a simple structure, is easy to install, and has high safety and reliability.

[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions: the overflow spillway anti-scour stability structure includes two left-right symmetrical diversion wing walls arranged along the back water surface of the retaining dam, and the back water surface of the retaining dam is paved with a protective layer of matting located between 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 to the back water surface of the dam by a positioning steel drill inserted into the dam. A diversion support rod is vertically provided on each diversion support. A transverse pressure rod pressed on the protective layer cloth is fixed on each diversion support in the horizontal direction. A longitudinal pressure rod is provided at the inner end of the transverse pressure rod. An L-shaped diversion cloth is provided between the top of the transverse pressure rod and the inner side of the diversion support rod. The upper part of the L-shaped diversion cloth is fixedly connected to the diversion support rod. The right side of the L-shaped diversion cloth of the left diversion wing wall and the left side of the L-shaped diversion cloth of the right diversion wing wall are connected as a whole by a cable.

[0006] A connecting ring is provided on the upper outer part of the diversion support rod. All the connecting rings on the left side and all the connecting rings on the right side are connected in series through a steel cable. The top end of each steel cable is connected to an anchor pile, which is implanted into the top surface of the dam.

[0007] A rectangular long groove is excavated along the length direction of the front side of the top face of the retaining dam. The front side of the protective layer pad is arranged in the rectangular long groove along the inner wall of the rectangular long groove. The protective layer pad is filled with pressed gravel in the rectangular long groove.

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

[0009] When the flood overflowing from the reservoir flows down the emergency spillway, it has a strong impact and pulling effect on the diversion wing walls on both sides of the spillway and the protective layer padding at the bottom. Therefore, the anti-impact and stability design of the wing walls on both sides of the spillway and the protective layer padding at the bottom is of paramount importance to whether the entire flexible spillway can discharge flood safely.

[0010] The anti-scouring and stability design of the diversion wing walls on both sides of the flexible spillway and the protective layer mat at the bottom is as follows:

[0011] First, dig a trench along the length of the dam at the mouth of the spillway (flood discharge outlet), bury the front end of the protective layer pad in the trench to ensure the stability of the upper part of the protective layer pad.

[0012] Second, when constructing an emergency spillway on the dam slope of the reservoir, press the water retaining bearings, transverse pressure rods and longitudinal pressure rods on the left and right sides of the protective layer pad, and use steel chisels to penetrate the protective layer pad to fix it.

[0013] Third, use the cable to connect the L-shaped guide cloth on the left and the L-shaped guide cloth on the right accordingly and tighten them, just like threading shoelaces, so that the L-shaped guide cloths on the left and right sides are connected into one.

[0014] Fourth, an anchor pile is constructed on each side of the flexible spillway at the top of the dam. A steel cable is used to connect the diversion support rods on each side and anchor them on the anchor piles at the top of the dam, so that all the diversion support rods remain perpendicular to the dam slope.

[0015] In summary, through the above four measures, the utility model ensures that the emergency flexible spillway can defend against the impact of the overflowing flood on the diversion wing wall and the bottom protective layer mat, thereby ensuring the safe and smooth completion of the overflow discharge of the reservoir. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 for Figure 1 Enlarged view of part A in the middle;

[0018] Figure 3 It is a cross-sectional schematic diagram of the present utility model. DETAILED DESCRIPTION

[0019] like Figure 1-Figure 3As shown, the overflow type spillway anti-scouring stability structure of the present invention includes two left-right symmetrical diversion wing walls 10 arranged along the back water surface of the water retaining dam 1, and a protective layer pad 11 located between the two diversion wing walls 10 is laid on the back water surface of the water retaining dam 1; the upper ends of the two diversion wing walls 10 of the present invention are connected to the spillway 3 of the emergency buoyancy dam 2 (water retaining sub-dike) arranged on the top of the water retaining dam 1.

[0020] Each diversion wing wall 10 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 on the back water surface of the water retaining dam 1 by a positioning steel drill 13 inserted into the water retaining dam 1, and each diversion support 12 is vertically provided with a diversion support rod 14, and each diversion support 12 is fixed with a transverse 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 transverse pressure rod 15. An L-shaped diversion cloth 17 is provided between the top of the transverse pressure rod 15 and the inner side of the diversion support rod 14, and the upper part of the L-shaped diversion cloth 17 is fixedly connected to the diversion support rod 14, and the right side of the L-shaped diversion cloth 17 of the left diversion wing wall 10 and the left side of the L-shaped diversion cloth 17 of the right diversion wing wall 10 are connected as a whole by a cable 18.

[0021] A connecting ring 19 is provided on the upper outer part of the guide support rod 14. All the connecting rings 19 on the left side and all the connecting rings 19 on the right side are connected in series through a steel cable 20. The top end of each steel cable 20 is connected to an anchor pile 21, which is implanted into the top surface of the dam 1.

[0022] A rectangular long groove 22 is excavated along the length direction on the front side of the top surface of the retaining dam 1. The front side of the protective layer pad 11 is arranged in the rectangular long groove 22 along the inner wall of the rectangular long groove 22. The protective layer pad 11 is filled with pressed gravel in the rectangular long groove 22.

[0023] Compared with the prior art, the present invention has the following technical effects:

[0024] As the floodwater overflowing from the reservoir flows down the emergency spillway, it has a strong impact and pulling effect on the diversion wing walls 10 on both sides of the spillway and the protective layer pad 11 on the bottom. Therefore, the anti-impact and stable design of the wing walls on both sides of the spillway and the protective layer pad 11 on the bottom is of paramount importance to whether the entire flexible spillway can safely discharge floodwater.

[0025] The anti-scouring and stability design of the diversion wing walls 10 on both sides of the flexible spillway and the protective layer pad 11 at the bottom is as follows:

[0026] First, dig a trench along the length of the dam 1 at the mouth of the spillway (flood discharge outlet), bury the front end of the protective layer pad 11 in the trench to ensure the stability of the upper part of the protective layer pad 11.

[0027] Second, when constructing an emergency spillway on the dam slope of the reservoir, the water retaining support, the transverse pressure rod 15 and the longitudinal pressure rod 16 are pressed on the left and right sides of the protective layer pad 11, and the protective layer pad 11 is fixed with a steel chisel.

[0028] Third, use the cable 18 to connect the L-shaped guide cloth 17 on the left and the L-shaped guide cloth 17 on the right accordingly and tighten them, just like threading shoelaces, so that the L-shaped guide cloths 17 on the left and right sides are connected as one.

[0029] Fourth, an anchor pile 21 is constructed on each side of the flexible spillway at the top of the retaining dam 1. A steel cable 20 is used on each side to connect and anchor the diversion support rods 14 to the anchor piles 21 at the top of the dam, so that all the diversion support rods 14 remain perpendicular to the dam slope.

[0030] 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. The overflow spillway anti-scour stability structure is characterized by: The invention comprises two left-right symmetrical diversion wing walls arranged along the back water surface of the retaining dam, and a protective layer of matting cloth is laid on the back water surface of the retaining dam between the two diversion wing walls; 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 to the back water surface of the dam by a positioning steel drill inserted into the dam. A diversion support rod is vertically provided on each diversion support. A transverse pressure rod pressed on the protective layer cloth is fixed on each diversion support in the horizontal direction. A longitudinal pressure rod is provided at the inner end of the transverse pressure rod. An L-shaped diversion cloth is provided between the top of the transverse pressure rod and the inner side of the diversion support rod. The upper part of the L-shaped diversion cloth is fixedly connected to the diversion support rod. The right side of the L-shaped diversion cloth of the left diversion wing wall and the left side of the L-shaped diversion cloth of the right diversion wing wall are connected as a whole by a cable.

2. The overflow spillway anti-scour stability structure according to claim 1, characterized in that: A connecting ring is provided on the upper outer part of the diversion support rod. All the connecting rings on the left side and all the connecting rings on the right side are connected in series through a steel cable. The top end of each steel cable is connected to an anchor pile, which is implanted into the top surface of the dam.

3. The overflow spillway anti-scour stability structure according to claim 1 or 2, characterized in that: A rectangular long groove is excavated along the length direction of the front side of the top face of the retaining dam. The front side of the protective layer pad is arranged in the rectangular long groove along the inner wall of the rectangular long groove. The protective layer pad is filled with pressed gravel in the rectangular long groove.

Images