A chute model test method for exploring the scraping mode of high-level landslide impact

Abstract

The invention discloses a chute model test method for high-altitude landslide impact shoveling and scraping mode exploration. Three different chute models are designed. The test method comprises the following steps: taking gravels as a sliding body, manufacturing a sliding body material in a hopper layered filling method, lifting a sliding chute according to an angle of 40 degrees through a sliding chute electric hoist device, opening a hopper gate, sliding down at a high position of the sliding body, performing potential kinetic energy conversion, impacting geometric change and mechanical yield characteristics of a lower cushion layer, and recording motion accumulation characteristics of the sliding body. Landslide movement accumulation characteristics of a sliding body after the high-altitude landslide slides down through potential motion conversion, impact stabilization of a lower cushion layer and scale amplification of secondary disasters are obtained. The motion accumulation characteristics of the lower cushion layer material on the sliding body under different sliding groove models are analyzed through a comparison test, and test technical support is provided for risk assessment and dangerous division of landslide disasters. An innovative sliding groove device and an unmanned aerial vehicle close photography technology are combined and fused into a large physical model damage test after landslide, and a reliable test thought is provided.

Description

technical field [0001] The invention relates to the technical field of chute model tests, in particular to a chute model test method for exploring high-level landslide impact scraping modes. Background technique [0002] Affected by active tectonic movements, the geological environment in the southwestern mountainous area of ​​my country is complex, and human engineering activities are intense, which is a high-risk area for super-large landslides. The characteristics of landslide hazards in this area mainly include the following points: (1) The landslide is easy to be cut out from the upper part of the high and steep slope, forming a high-level rock avalanche; The upper part of the slope is cut out, forming a sliding body that accelerates and falls in the air, hits the surrounding rock and soil, and then transforms into a debris flow that slides at high speed and long distance; cause devastating damage. However, it may be difficult to record and capture the scooping phenom...

AI Technical Summary

Problems solved by technology

[0006] (3) Existing tests lack reduction tests on high-level landslide impact scraping modes (impact, entrainment and compound scraping) and mechanical mechanism analysis;

[0007] (4) The existing technology intends to obtain the movement and accumulation characteristics of the landslide during its movement, without considering the deformation and yield modes of different underlying layers under the action of a large impact force after the solid-phase landslide slides from a high position and undergoes potential-kinetic energy conversion;

[0008] (5) The existing chute motion model test does not use the impact yield of different underlying materials for comparison;

[0009] (6) In terms of test equipment: the existing chute motion model test does not use variable-angle chute test equipment, drone photography technology, accumulation body color difference recognition and other data extraction technologies

[0010] (7) There are no conclusions in the existing experiments, and it is proposed that the landslide impact shoveling type mainly includes four modes: impact splash type, transfer slip type, embedded pushover type, and entrainment type ( Image 6 ), the mode of action is mainly a little impact and surface shear

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