High-rigidity prestress loading framework structure for large-scale three-dimensional physical model test

Abstract

The invention provides a high-rigidity prestress loading framework structure for a large-scale three-dimensional physical model test. The high-rigidity prestress loading framework structure comprisesa base, an anti-deformation prestress loading framework assembly, a load exertion assembly and a model test specimen preparation and conveying assembly, wherein the anti-deformation prestress loadingframework assembly and the model test specimen preparation and conveying assembly are arranged on the base; the load exertion assembly is arranged on the anti-deformation prestress loading framework assembly; the anti-deformation prestress loading framework assembly comprises a middle framework, a front end framework and a back end framework; in a large-tonnage loading process, the self deformation of test equipment in the loading process can be effectively controlled; the test data credibility is improved; the screw bolt connection mode of a conventional loading framework is thoroughly avoided; the rigidity requirement of a hard rock similar material under the large-tonnage loading can be effectively met; the loading framework has higher automation degree; the artificial model test specimen preparation and conveying assembly is used for the first time; the precision detection during the test specimen preparation is met; the work intensity and the operation risk of experiment personnelcan be greatly reduced.

Description

technical field [0001] The invention belongs to the technical field of large-scale three-dimensional physical model tests, in particular to a high-rigidity prestressed loading frame structure for large-scale three-dimensional physical model tests. Background technique [0002] The large-scale three-dimensional physical model test is based on the similarity theory. By configuring artificial model materials with properties similar to those of engineering rock mass, and carrying out excavation and monitoring tests under different boundary loading conditions, it can effectively reveal the deformation and cracking of rock mass under the influence of human engineering activities. evolution mechanism. [0003] At present, large-scale three-dimensional physical model tests have been widely used. However, as underground engineering construction and resource mining continue to go deep, the volume and complexity of deep caverns are also increasing. Engineering unloading damage and eng...

AI Technical Summary

Problems solved by technology

[0007] Aiming at the problems existing in the prior art, the present invention provides a high-rigidity prestressed loading frame structure for a large-scale three-dimensional physical model test, which can effectively control the self-deformation of the test equipment during the loading process during the large-tonnage loading process, and improve the accuracy of the test data. Reliability; the bolt connection method used in the traditional loading frame is completely abandoned, which can effectively meet the stiffness requirements of similar hard rock materials under large-tonnage loading; the loading frame has a high degree of automation, and is equipped with artificial model specimens for the first time. The transport mechanism effectively separates the preparation area of ​​the artificial model sample from the loading area, satisfies the accuracy detection of the artificial model sample in the preparation stage, avoids the influence of the artificial model sample on the test data due to insufficient preparation accuracy, and can greatly reduce the The labor intensity and operation risk of the experimenters not only facilitate the daily maintenance of the test equipment, but also facilitate the removal of the damaged sample and further research after the test is over.

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