Multi-layer sliding zone landslide and slide-resistant pile model test system and method

Abstract

The invention provides a multi-layer sliding zone landslide and slide-resistant pile model test system. The system comprises a model box, a landslide monitoring device and a movable loading device. The model box is internally provided with a simulated slide bed, a simulated landslide body and a simulated slide-resistant pile. The simulated landslide body is internally provided with multiple layersof simulated sliding zones. The simulated slide-resistant pile is buried in the simulated landslide body. The landslide monitoring device comprises micro resistor type strain gages, micro resistor type earth pressure cells, flexible inclinometers and a 3D laser scanner which are arranged in the simulated landslide body. The movable loading device comprises a lifting rod, hydraulic jacks and a stretchable bearing plate. The rear ends of the hydraulic jacks are movably connected with the lifting rod, and the front ends of the hydraulic jacks are movably connected with the stretchable bearing plate. The front end face of the stretchable bearing plate is attached to the rear end face of the simulated landslide body. The multi-layer sliding zone landslide and slide-resistant pile model test system has the beneficial effects that the adjustable vertical height of the stretchable bearing plate is consistent with the thickness of the corresponding borne single-layer landslide body, the layering thickness of the landslide body can be changed at will for load applying, and accurate simulation is realized.

Description

technical field [0001] The invention relates to the technical field of geological disaster model tests, in particular to a multi-layer slide belt landslide-anti-slide pile model test system and method. Background technique [0002] The landslide model test belongs to the category of geomechanics model test, and its theory originated from the structural model test established in the early 20th century. In the 1960s, E. Fumagalli in Italy carried out a large-scale physical model test research based on the Vajont hyperbolic arch dam, which is a sign of the generation of geomechanical model test technology. In the 1980s, this research method began to be developed in China. The landslide prototype material was used in the model tank to make a simulated landslide model, and when the boundary conditions were met, the prototype was revealed through the analysis of monitoring data such as earth pressure and simulated landslide mass displacement. Formation and evolution mechanism of ...

AI Technical Summary

Problems solved by technology

At present, the research on the landslide model experimental device is still developing and improving, but considering the research of current scholars, it is found that there are certain limitations:

[0004] The loading of the traditional model device requires a fixed hydraulic jack to provide force. Its control system is complicated and the operation is cumbersome. It can only simulate the load application process of a single-layer slide belt landslide. The point of action of the loading force, the direction of action and the corresponding loaded landslide mass constant thickness;

[0005] The traditional model test monitoring device cannot accurately monitor the relative displacement between different layers of landslide bodies and the force of the anti-slide pile and the surrounding soil in real time, and it is difficult to deeply analyze the start-up mechanism of the multi-layer slide belt landslide and the impact of the anti-slide pile after the implantation of the anti-slide pile. Research on the force change and overall stability of landslides;

[0006] The traditional model test device is large in size and complex in structure, which is not conducive to the integrated fine research of landslides

The experimental frame occupies a large area of ​​the site, and the lateral deflection does not match the actual situation when the load is large, making it difficult to move

Making landslide models consumes a lot of time, manpower and material resources

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