Method and device for lowering damage to dam caused by land slide surges
A technology for dams and swells, applied in the field of protective structures of water conservancy and hydropower projects, can solve problems such as reducing operating benefits, increasing construction investment, and unsatisfactory economic indicators of the plan, achieving good results, large economic benefits, and avoiding dam heightening Or control the effect of running water level
Active Publication Date: 2018-06-01
CHINA POWER CONSRTUCTION GRP GUIYANG SURVEY & DESIGN INST CO LTD +3
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The methods in the prior art generally increase the construction investment or reduce the operating efficiency by a large margin, which in turn leads to unsatisfactory economic indicators of the scheme
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[0028] According to the analysis of prototype observation data about landslide surges in the reservoir area, landslide surges will be greatly weakened when they encounter sudden changes in terrain or obstacles when propagating along the river. Therefore, in this example, folding ruler-shaped suspension fences are arranged at regular intervals at 1-2 km where landslide surges may occur. The suspension fences are made of steel. When the water level changes, the folding ruler-shaped suspension fences can rotate with the hinged joints. And realize expansion and contraction, middle part is connected with floating box, and floating box plays the effect of support. The folding ruler-shaped hanging grid is connected with the anchor pier on the shore, and the anchor pier plays a fixed role.
[0029] During specific implementation, the folding rule unit 2 can be processed in batches by a professional factory. The two ends of four square steels 4 in the folding rule unit 2 adopt round h...
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The invention discloses a method and a device for lowering damage to a dam caused by land slide surges. The device is characterized in that multiple barriers which float on a water surface are arranged on water which is 1-2 km away from a place where the land slide surges are likely to happen; potential energy of surface water streams formed by land slide is weakened through the barriers floatingon the water surface; and the flowing speed and height of the land slide surges are lowered to be within the range which is bearable for the downstream dam, so that the dam is prevented from being damaged by the land slide surges. According to the device, when the land slide surges come, the surges pass through grids, so that energy dissipation is realized through water stream turbulent mixing; the speed and height of the land slide surges are lowered; and the speed and height of the land slide surges are lowered to an acceptable degree after passing through the multiple stages of hanging grids, so that basically the land slide surges do not threaten the dam before reaching the dam. The method and the device are good in energy dissipation effect and low in investment; and the measures of large-scale slope treatment and dam heightening or operation water level control can be avoided, so that the method and the device has a great economic benefit.
Description
technical field [0001] The invention relates to a method and a device for reducing landslide surge damage to a dam, and belongs to the technical field of protection structures for water conservancy and hydropower projects. Background technique [0002] Because power stations are generally built in mountainous areas, there are a certain number of accumulations distributed around the reservoir area. During the heavy rain season, some accumulations may be subject to landslides due to stability problems. When a landslide occurs, the water in the reservoir will form a swell, and the high-energy water flow formed by the swell will cause great harm to the dam. In order to prevent landslides, the methods currently used mainly include the following: one is to control the unstable mountain to make it stable; the other is to increase the thickness and height of the dam when building the dam; there is another It is to lower the operating water level. The methods in the prior art gene...
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Login to View More IPC IPC(8): E02B8/06
CPCE02B8/06
Inventor 郝鹏张合作程瑞林邱焕峰申显柱陈仁宏
Owner CHINA POWER CONSRTUCTION GRP GUIYANG SURVEY & DESIGN INST CO LTD