Centrifugal model test device for maintaining normal water level overtopping burst of barrier lake

Abstract

The invention provides a centrifugal model test device for maintaining normal water level overtopping burst of a barrier lake. A test water supply pipe is connected to the front end of a centrifugal model test box, and a drainage hole is formed in the bottom of the rear end; a reservoir area water tank, a weir plug body, a water measuring weir plate and a sand blocking grating are sequentially arranged in the centrifugal model test box from the front end to the rear end; an elevation-adjustable overflow pipe is arranged on the reservoir area water tank; the front end of the weir plug body is high, and the rear end of the weir plug body is low and used for accumulating outburst flood. And an inclined plate is arranged below the weir plug body and is provided with water permeable holes. The water level of a reservoir area can be kept stable in a barrier lake outburst centrifugal model test, so that the barrier dam outburst centrifugal model test can achieve the purpose of truly simulating the actual barrier body outburst process, and the method has extremely important scientific research value for researching the barrier lake overtopping outburst problem and understanding the whole process of outburst, breach occurrence and development of the barrier lake overtopping outburst problem.

Description

technical field [0001] The invention belongs to the technical field of water conservancy experiments, and in particular relates to a centrifugal model test device for keeping the constant water level of a barrier lake from overflowing and collapsing. Background technique [0002] The barrier dam is a natural dam with a certain water storage capacity formed by the slope instability blockage of the river, and the barrier lakes of different scales coexist with the barrier dam. In a kind of geological disaster induced by factors, after the formation of the barrier dam, the upstream water level will rise, leading to the upstream submerged disaster, the barrier dam is very easy to collapse, and after the collapse, a huge collapse flood will be formed, causing serious harm to the downstream area , Landslides formed barrier lakes and caused a series of geological disasters frequently occurred in the world. [0003] The study of the failure process of the barrier dam is an importa...

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Problems solved by technology

[0005] In the centrifugal model test of the barrier dam failure, in order to reveal the evolution process of the breach and the flood, it is usually necessary to simulate the water level of the barrier lake in the scheme design. The upstream water level of the barrier dam model is fixed at the initial and development stages of the failure The outburst flood can have a relatively complete and real evolution process, which brings difficulties to the water supply system of the model test. Since the water volume in the model test box is generally about 5 liters, the water supply system is too fast, and the dam may occur. The roof collapsed, the water supply was too slow, and the water level in the model box dropped too fast, which completely failed to reflect the real expansion of the breach and the evolution of the flood. Both situations lead to the failure of the experimental purpose

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