Physical testing device for simulating sandy soil debris flow, and testing method

Abstract

The invention discloses a physical testing device for simulating sandy soil debris flow, and a testing method, and relates to the technical field of the geological experiment. A technical scheme key point is that the physical testing device comprises a transparent model box, a rainfall simulation device and a data collection system; a sand model is laid in the transparent model box; a sensor device is buried in the sand model; the rainfall simulation device comprises a water inlet box, a water manifold and a nozzle; the data collection system is composed of a high-definition camera, stereo-microscopy equipment, a dynamic strain collection system connected with a sensor device, and computer equipment; the high-definition camera, the stereo-microscopy equipment and the dynamic strain data collection system are connected with the computer equipment. The development process of the sandy soil debris flow can be elaborately and visually acquired; debris flow starting characteristics, displacement field evolution process and damage morphology can be obtained through the analysis, thereby conveniently and deeply researching a complex induction mechanism of the debris flow, and proposing the technical support and the theoretical evidence for an effective prevention engineering measure.

Description

technical field [0001] The invention relates to the technical field of geological experiments, more specifically, it relates to a physical test device and test method for simulating sandy soil debris flow. Background technique [0002] my country is one of the countries with the most developed, the largest number and the most serious hazards of debris flows in the world. Debris flow, as a common natural disaster in mountainous areas, often seriously damages infrastructure such as roads, railways, bridges, tunnels, communications and electric power, and poses a serious threat to people's lives and property. The process of debris flow includes solid, liquid, and gas coupling, and its mechanical mechanism is complex. It is still a huge engineering technical problem. Numerical simulation is difficult and cannot reveal its characteristics deeply. Physical model testing is an effective method. [0003] At present, the considerations of the debris flow simulation test device in th...

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Problems solved by technology

[0004] In the debris flow simulation device in the prior art, in the process of simulating the debris flow test, the degree of refinement of the test data collection is not high; at the same time, the degree of visualization in the process of simulating the debris flow test is not high, which is not convenient for the process of simulating the debris flow test. Observation makes it impossible to obtain the development process of debris flow in a refined and visual manner, and it is not convenient to obtain accurate evolution process of debris flow displacement field, failure form and start-up characteristics through simulation test analysis

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