System for testing physical model for large-scale landslides under action of multiple factors

Abstract

The invention discloses a system for testing a physical model for large-scale landslides under the action of multiple factors, which comprises a reservoir level fluctuation simulation unit, a landslide experiment slot section, an artificial rainfall simulation unit and a measuring unit, wherein the landslide experiment slot section comprises a horizontal slot section and a slope slot section, the horizontal slot section and the slope slot section are respectively paved with a slope body consisting of sand-soil mixtures, and the rear end of the horizontal slot section is hinged with the front end of the slope slot section; the slope slot section is composed of more than two slot sections which are sequentially hinged end to end, and the bottom of each slot section is provided with a lifting unit which can adjust the dip angle of the slot section; the rear end of the slope slot section is provided with a Malpighian-tube rear-edge water-replenishing unit; and the measuring unit comprises a deformation measuring part and a stress measuring part, wherein the deformation measuring part is used for measuring the deformation process of the slope body, and the stress measuring part is used for measuring the water pressure and water content of a pore of the slope body. By using the system disclosed by the invention, the changing regularity of each measurable physical quantity of a landslide in different development stages can be grasped accurately, thereby providing a possibility for better developing the studies on key parameters of landslides in different evolution stages.

Description

technical field [0001] The invention relates to a physical model experiment device for the whole process of landslide development considering factors of rainfall, reservoir water level rise and fall, and pressurized water. Experimental research, while studying the measurable physical quantities and corresponding testing equipment at different development stages of landslides. Background technique [0002] In terms of landslide physical model experimental research, Taiwanese scholar Huang Ching-Chuan (2007) carried out landslide model experiments. The experimental devices mainly include straight-type landslide test tanks, artificial rainfall systems, high-speed camera systems, and test systems. The relationship between the critical volumetric water content, pore water pressure and the overall stability of the landslide at different points of the landslide; Sergio D.N.Lourenco (2006) conducted a model experiment to carry out the influence of permeability on the stability of th...

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Problems solved by technology

[0008] However, although the above-mentioned landslide model experimental devices have promoted the development of such devices to a certain extent, they all have limitations or defects to a certain extent:

[0009] (1) The sliding bed has a single shape, most of which are straight and one-piece, but the actual sliding bed surface is mostly a concave surface, so there is a large error in the geometric boundary conditions;

[0010] (2) The operation accuracy of traditional experimental equipment is not enough, and most of the mechanical transmission parts are manually operated, resulting in large experimental errors, so most of them are limited to qualitative research, and the degree of quantitative research is not enough;

[0011] (3) The traditional model experiment considers a single factor, and it is difficult to carry out research on the mechanism of multi-factor landslide disasters

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