Aeration structure for Longluowei flood discharging tunnel

A technology of flood discharge tunnels and dragon tails, which is applied in water conservancy projects, sea area engineering, coastline protection, etc., can solve the problems of cavitation damage in flood discharge tunnels, and achieve the effects of reducing cavitation damage, smooth water flow, and sufficient aeration

Inactive Publication Date: 2015-03-04
POWERCHINA CHENGDU ENG
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AI Technical Summary

Problems solved by technology

High-speed water flow turbulence causes water flow cavitation to form a small impact force on the concrete on the overflow surfa

Method used

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  • Aeration structure for Longluowei flood discharging tunnel
  • Aeration structure for Longluowei flood discharging tunnel
  • Aeration structure for Longluowei flood discharging tunnel

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[0023] The present invention will be further described below in conjunction with the drawings.

[0024] Such as Figure 1 to Figure 4 The aeration structure of the Longluowei spillway tunnel shown includes a spillway tunnel. The spillway tunnel is composed of a tunnel initial section 1, a slope section 2, an inverted arc section 3, and a downstream slope section 4 connected in sequence. The spillway tunnel is arranged There is at least one aeration hurdle.

[0025] Long Luowei is a type of spillway tunnel that concentrates higher water heads in a shorter range on the downstream side of the tunnel. In this process, high-speed water turbulence causes water cavitation to form a small impact on the concrete on the overflow surface of the spillway. , Long-term, massive micro-impact can easily cause cavitation damage to the spillway tunnel. Therefore, in the present invention, at least one aerated air sill is first arranged in the Longluowei flood discharge tunnel, and air is injected i...

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Abstract

The invention relates to the field of water conservancy and hydropower, in particular to an aeration structure for a Longluowei flood discharging tunnel. The technical problem to be solved is to provide the aeration structure for the Longluowei flood discharging tunnel, which is capable of effectively reducing damage to an overcurrent surface of the flood discharging tunnel due to cavitation of high-speed flow. The aeration structure for the Longluowei flood discharging tunnel comprises a flood discharging tunnel, wherein the flood discharging tunnel is formed by connecting a tunnel initial segment, a slope segment, a reverse camber segment and a downstream slope segment in sequence, and at least one aeration aerator is arranged in the flood discharging tunnel. During actual use, the flood discharging tunnel is formed by connecting the tunnel initial segment, the slope segment, the reverse camber segment and the downstream slope segment in sequence, and air admission is carried out on flow in the flood discharging tunnel through the flood discharging tunnel, so that the small impact force on concrete of the overcurrent surface of the flood discharging tunnel, which is caused by flow cavitation due to turbulent fluctuation of high-speed flow, can be effectively reduced, and cavitation corrosion damage to the flood discharging tunnel is reduced, and thus the effects of smooth flow state of the flow and full aeration are achieved. The aeration structure is particularly suitable for construction of the Longluowei flood discharging tunnel.

Description

technical field [0001] The invention relates to the field of water conservancy and hydropower, in particular to an aeration structure of a Longluowei flood discharge tunnel. Background technique [0002] With the country's demand for hydropower and clean energy, a large number of high dams have been built, and correspondingly, flood discharge facilities with high water head and high flow rate have been built for flood discharge. The layout of the Longluowei flood discharge tunnel reduces the range of high-velocity sections and the difficulty of aeration and corrosion reduction, which is conducive to centralized treatment of high-speed water flow problems. High-speed water flow turbulence causes water flow cavitation to form a small impact force on the concrete on the overflow surface of the spillway tunnel, and long-term and huge micro-impact effects can easily cause cavitation damage to the spillway tunnel. Contents of the invention [0003] The technical problem to be s...

Claims

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Application Information

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IPC IPC(8): E02B8/06
CPCE02B8/06
Inventor 王仁坤夏勇杨怀德杨敬刘强石江涛华大恩鲁毅
Owner POWERCHINA CHENGDU ENG
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