Experimental device and experimental method for simulating formation to break of barrier dam

Abstract

The invention provides an experimental device and an experimental method for simulating formation to break of a barrier dam. The device comprises a water storage tank, a water measuring weir, a main tank, a branch ditch and a bracket, wherein the water measuring weir is used for injecting water into the water storage tank and measuring the upstream incoming flow of the water storage tank; the maintank is connected with an outlet of the water storage tank; the gradient of the main groove, the gradient of the branch ditch and the height of the connecting plate are adjustable; the width of a fluid channel of the main groove is adjustable; the incoming flow and the water surface height are adjustable; therefore, the conditions of different main grooves and branch grooves can be simulated moreaccurately; a process of forming the barrier dam by landslide river blockage under different branch ditch landslide mass material source magnitude conditions as well as a break flooding evolution process is also provided. The method is beneficial to more comprehensively obtaining the data of the barrier dam disaster chain evolution rule, the formation characteristics and the burst water supply characteristics, and the scientificity and accuracy of the barrier dam formation process and the barrier dam burst mechanism research are improved.

Description

technical field [0001] The invention belongs to the field of mechanical model experiment facilities, and in particular relates to a test device for simulating the formation of a dam to its failure in the study of dam failure. Background technique [0002] The terrain in southwestern China is dominated by plateaus and mountains, and there are many rivers running through the valleys, showing great surface cuts and undulations, resulting in frequent occurrence of geological disasters in this area. Under the action of natural disasters such as earthquakes or heavy rains, natural disasters such as landslides and debris flows often occur, and the slope of the river bank is easily affected and becomes unstable, causing a large-scale soil-rock mixture to slide into the river, and then form a dam to block the river. If the barrier dam does not break for a while, the river water will form a barrier lake behind the dam. The barrier dam blocks the river, and the river cannot be dischar...

AI Technical Summary

Problems solved by technology

These may cause the permeability of the model earth dam and the local dam height, which have a greater impact on the failure of the barrier dam, to be different from the actual situation, so that the test cannot accurately simulate the real situation, resulting in test deviations

Moreover, the landforms and river flow regimes of the barrier dams currently formed in various parts of my country are different. Few of the existing model experiments can flexibly meet various experiments, cannot truly simulate the actual river conditions, and are difficult to build. Higher cost

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