Large movable lateral uplifting composite lading slope physical model test apparatus

Abstract

A large movable lateral uplifting composite lading slope physical model test apparatus comprises a test framework, a bottom uplifting mechanism, a rear portion loading mechanism and a water level elevating simulation mechanism; the bottom of the front portion of the test frame is hinged to the test site ground surface, the test frame is formed by mutually splicing a front panel at the front portion, at least two vertically-arranged guard boards and a frame baseboard at the bottom portion, and the spacing between adjacent guard boards is adjustable; the bottom uplifting mechanism is arranged below the test frame and is used for driving the rotation of the test frame around the hinge pint at the front portion; and the rear portion loading mechanism comprises a loading steel board, an electro-hydraulic servo loading machine and a counterforce wall, the counterforce wall is arranged behind the test frame, the rear end of the electro-hydraulic servo loading machine is hinged to the counterforce wall, the front end of the electro-hydraulic servo loading machine is connected with the loading steel board, and the rear portion loading mechanism is used for applying action force to a slope physical model in the test frame from the rear end of the test frame. The apparatus is suitable for large-size slope physical models, and can realize the establishment of three-dimensional models better satisfying geometric similarity conditions than real slopes.

Description

technical field [0001] The invention belongs to the field of geological disaster model tests, and relates to test instruments related to landslide physical model tests, in particular to a large-scale movable lateral lifting compound loading landslide physical model test device. Background technique [0002] my country is a country where landslides, landslides, debris flows and other geological disasters frequently occur, among which landslides account for a large proportion of geological disasters. In addition, due to the continuous intensification of human engineering activities, landslide geological disasters have become one of the major global geological disasters. At present, in order to effectively prevent and control landslides, scholars at home and abroad are trying to use experimental methods to explore the formation mechanism of landslides. The physical model test of landslides is one of the effective means to study the formation laws of landslides. It can be used t...

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Problems solved by technology

[0011] Although the research and development of the above-mentioned landslide physical model test devices has promoted the development of geomechanical model test research methods to a certain extent, considering the above-mentioned multiple model test devices or systems, it is found that there are still some limitations or defects:

[0012] (1) The size of the traditional model test device is small, so that the landslide physical model is significantly affected by the boundary effect of the frames on both sides during the test; some landslide physical model test devices are only suitable for teaching, and are made of transparent materials into small model frames In order to show the formation process of the landslide, it is impossible to simulate the actual landslide; the physical model of the landslide is sensitive to the external force response during the test, and slight disturbances will cause obvious deviations in the test data; Carry out detailed research on the prevention and control structures in action; the landslide physical model has a small stacking space, which is not convenient for the formation and arrangement of monitoring equipment;

[0013] (2) Most of the traditional model test devices are fixed frames, which can only change the width of the landslide physical model frame within a very limited range at most, and cannot adjust the geometric dimensions of the frame according to the research needs. It is difficult to meet the requirements of a frame suitable for different landslide physics Due to the requirements of the model, it is necessary to develop different landslide physical model frameworks for different research objects, resulting in a great waste of test costs;

[0014] (3) It is difficult to simulate the change of landslide stress conditions

The boundary conditions of the external force during the evolution of the landslide are often not constant, so it is necessary to apply additional force to simulate the change of the external force condition in the test, and the existing test devices often cannot realize the simulation of the incomplete landslide geomechanics model by applying external loads;

[0015] (4) 3D landslide geological model is difficult to simulate

At present, the landslide physical model test is mainly based on the landslide field survey data to extract the key sections of the landslide model to establish a generalized landslide physical model. The force and deformation characteristics of the landslide, after the generalization of the plane strain model, the physical model of the landslide has errors compared with the simulation of the actual landslide

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