Dam break type debris flow dynamic evolution whole-process simulation test system

Abstract

The invention relates to a dam break type debris flow dynamic evolution whole-process simulation test system. The system comprises a model box, wherein the debris flow simulation device is arranged ina centrifugal machine chamber, is used for simulating the whole process of debris flow power evolution, and comprises a storage box, a baffle, a sliding face, a blocking structure and a motor, the storage box and the blocking structure are arranged on the upper portion and the front side of the bottom of the sliding face respectively, the baffle is rotationally arranged at an outlet, facing the bottom of the sliding face, of the storage box, and the motor controls opening of the baffle; a data acquisition system which comprises a sensor arranged in the model box; and a high-speed camera system which is arranged in the centrifugal machine chamber and comprises a high-speed camera and a high-brightness LED light source. Compared with the prior art, the device has the advantages of strong simulation capability, capability of truly reproducing the whole dynamic evolution process of the debris flow, full automation, remote control, simplicity and convenience in use, low economic cost and the like.

Description

technical field [0001] The invention relates to the field of engineering geology, in particular to a simulation test system for the whole process of dynamic evolution of dam-break debris flow. Background technique [0002] In recent years, geological disasters of large deformation and flow of soil such as debris flows have caused great economic property losses and casualties because of their huge impact damage effects and unpredictable characteristics. At present, the disaster-causing mechanism of this kind of geological disaster has not been completely resolved, mainly reflected in the unclear dynamic evolution mechanism of the debris flow initiation, movement, impact and accumulation process. One of the difficulties in the above scientific research is the lack of scientific and effective physical simulation methods. [0003] At present, domestic and foreign researches mostly use conventional gravity model tests to carry out the dynamic evolution process test of debris flow...

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Problems solved by technology

[0005] (1) In a supergravity environment, the lateral earth pressure of the fill in the storage box on the baffle is dozens of times higher than that under 1g of gravity. Under the huge lateral pressure, how to ensure that the baffle is closed in the initial state The locked state is the first major technical difficulty of this type of test system, and with the increase of the simulation volume, the difficulty of realizing the locked baffle will be further greatly increased;

[0006] (2) The weight of the baffle itself also increases sharply with the increase of centrifugal acceleration, resulting in an increase in its inertia. Therefore, how to increase the opening speed of the baffle under the supergravity field is the second major technical difficulty of this type of test system;

[0008] (4) The centrifuge room is a closed environment, so how to remotely control the opening of the baffle to simulate the whole process of debris flow is the fourth major technical difficulty of this type of test system;

[0009] (5) Common light sources are mostly used in the centrifuge room. This light source is sufficient for conventional lighting, but it cannot meet the requirements of high-speed cameras for light sources. Therefore, how to artificially supplement the light during the high-speed camera process is a test of this type. The fifth major technical difficulty of the system

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