Testing apparatus for determining rockfall recovery coefficient by considering contact relation and testing method

Abstract

The invention discloses a testing apparatus for determining a rockfall recovery coefficient by considering a contact relation. The testing apparatus comprises a portal frame, a movable fixing rack, arockfall releaser, a rockfall sample and a slope simulation test bed. The movable fixing rack is arranged on a beam of the portal frame; the rockfall releaser is lifted by two steel wire ropes, and the rockfall sample is lifted by the rockfall releaser. The slope simulation test bed is arranged below the portal frame and comprises a slope simulation box; a slope simulation material and multiple sensors are contained in the slope simulation box; slopes of different shapes, different directions and different gradients can be simulated by slope simulation materials. When the rockfall recovery coefficient in different contact relations is determined, different contact relations between the rockfall sample and the simulated slope are simulated by the testing apparatus, such as point-surface contact, edge surface contact, surface-to-surface contact, point-edge contact, edge-edge contact, surface-edge contact, point-point contact, edge-point contact and surface-point contact; then, the rockfall recovery coefficient in different contact relations is determined.

Description

technical field [0001] The invention relates to a test device and a test method for measuring the recovery coefficient of falling rocks in consideration of the contact relationship. The invention belongs to the technical field of geotechnical engineering. Background technique [0002] Rockfall means that the rock mass on the surface of the slope is cut by joints and fissures, and is separated from the slope under the action of gravity or other external forces. After a series of movements such as falling, collision, rebound, rolling, sliding, etc. The geological disaster that stopped is one of the common geological disasters in mountainous areas. [0003] Although the scale of rockfalls is small, due to frequent occurrence, high suddenness, strong randomness, and large impact range, the hazards of rockfall disasters are similar to those caused by large-scale landslide disasters, and the number of deaths caused by rockfall disasters has been compared with Other forms of slop...

AI Technical Summary

Problems solved by technology

[0005] In recent years, scholars at home and abroad have carried out a lot of fruitful research work on rockfall disasters. However, rockfall is a dynamic problem in which rocks and slopes repeatedly contact and collide with each other. Due to the complexity of the three-dimensional contact problem, the three-dimensional rockfall movement law prediction problem It is still not well resolved, and the determination of the existing rockfall restitution coefficient is not related to the contact relationship between rockfall and slope

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