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Compound continuous stepped spillway and implementation method thereof

A spillway and ladder technology, which is applied in water conservancy projects, sea area engineering, coastline protection, etc., can solve the problems that the steady flow and energy dissipation rate of stepped spillways cannot meet the requirements of flood discharge energy dissipation, spillway damage, etc., so as to avoid cavitation damage and ensure The effect of safe operation

Inactive Publication Date: 2020-11-17
张靖
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing stepped spillway is difficult to meet the requirements of flood discharge and energy dissipation in terms of steady flow and energy dissipation rate, and when the water flow is too large, it is easy to cause local damage to the spillway

Method used

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  • Compound continuous stepped spillway and implementation method thereof
  • Compound continuous stepped spillway and implementation method thereof
  • Compound continuous stepped spillway and implementation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] refer to Figure 1-3, a compound continuous stepped spillway, including a flood inlet mechanism 1 and a flood overflow mechanism 2, the outlet end of the flood inlet mechanism 1 is connected to the overflow mechanism 2, the flood inlet mechanism 1 includes a flood inlet gate assembly 11 and a bearing surface 12, and the flood inlet gate The assembly 11 is installed on the upper end surface of the bearing surface 12, and the flood gate assembly 11 is composed of a rotating motor 111, a splint 112 and an arc gate 113. A rotating motor 111 is arranged on one side of the splint 112, and the output end of the rotating motor 111 The arc gate 113 is connected through the drive shaft 1111, and the side of the bearing surface 12 close to the arc gate 113 is connected with a flood mechanism 2; Several cushion blocks 1131 are arranged on the arc surface of the arc gate 113, and a rotating rod 1132 is installed on the side of the arc gate 113 close to the sleeve 1121. The other end...

Embodiment approach

[0038] In order to better demonstrate the implementation process of the compound continuous stepped spillway, this embodiment now proposes an implementation method of the compound continuous stepped spillway, including the following steps:

[0039] Step 1: At the beginning of flood discharge, the water flow passes through the first water inlet stopper 1123 and the second water inlet stopper 11231 in sequence and contacts the inner side of the arc gate 113, and at the same time starts the rotating motor 111, and uses the drive shaft 1111 to rotate the arc gate 113 To a certain angle or when the water flow rate is large, do not start the rotating motor 111 and directly use the square water channel 1133 to drain water, and make the water flow pass through the first water inlet block 1123 and discharge into the overflow side wall 22;

[0040] Step 2: After the water flow enters the spillway side wall 22, it first flows into the first-level energy dissipation tank 2211 of the upper ...

Embodiment 2

[0046] refer to Figure 7-8 , a compound continuous stepped spillway, including a flood inlet mechanism 1 and a flood overflow mechanism 2, the outlet end of the flood inlet mechanism 1 is connected to the overflow mechanism 2, the flood inlet mechanism 1 includes a flood inlet gate assembly 11 and a bearing surface 12, and the flood inlet gate The assembly 11 is installed on the upper end surface of the bearing surface 12, and the flood gate assembly 11 is composed of a rotating motor 111, a splint 112 and an arc gate 113. A rotating motor 111 is arranged on one side of the splint 112, and the output end of the rotating motor 111 The arc gate 113 is connected through the drive shaft 1111, and the side of the bearing surface 12 close to the arc gate 113 is connected with a flood mechanism 2; Several cushion blocks 1131 are arranged on the arc surface of the arc gate 113, and a rotating rod 1132 is installed on the side of the arc gate 113 close to the sleeve 1121. The other en...

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Abstract

The invention discloses a compound continuous stepped spillway and further discloses an implementation method of the compound continuous stepped spillway. The compound continuous stepped spillway comprises a flood inlet mechanism and a flood overflow mechanism, the water outlet end of the flood inlet mechanism is connected with the flood overflow mechanism, and a plurality of square water passinggrooves are formed in the bottom end of an arc-shaped gate, so that when the flood discharge water flow is large, a rotating motor is not started, the square water passing grooves are directly used for draining water, water flow can sequentially pass through a plurality of check blocks and buffer cushion blocks to be buffered and unloaded, meanwhile, the square water passing grooves are used for compressing the water flow with the too large flow and the too fast flow, and the situation that the water flow with the too large flow is directly drained into a spillway to cause local damage to thespillway is avoided; and after the water flow enters the flood overflow side wall, the water flow firstly flows into a first-stage energy dissipation groove of an upper-layer main step, primary energydissipation is carried out, part of the water flow is buffered through a buffer groove when flowing through a high tail sill, the energy dissipation position and the aeration corrosion reduction position are advanced to the maximum extent, and cavitation damage to the front portion of the step in the flood discharge process is advantageously avoided.

Description

technical field [0001] The invention relates to the technical field of water conservancy engineering, in particular to a compound continuous stepped spillway and an implementation method thereof. Background technique [0002] As a spillway set up in a water conservancy and hydropower project, in addition to meeting the flood discharge capacity, it should also ensure the safety of the flood discharge structure during operation, be well connected with the original river flow, and be able to fully exert the due energy dissipation effect to avoid the discharge of water. Cause erosion damage to the downstream riverbed and bank slope. The stepped spillway is designed with a smooth overflow surface in the shape of steps. On the one hand, it can increase the roughness of the water-passing wall surface. On the other hand, because of the formed sill, a large amount of air can be added to the water flow, so that the capacity of the water flow along the way can be improved during the di...

Claims

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Application Information

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IPC IPC(8): E02B8/06E02B7/42
CPCE02B7/42E02B8/06
Inventor 张靖
Owner 张靖
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