Fully automatic true-triaxial tunnel and underground construction model testing system

Abstract

The invention discloses a fully automatic true-triaxial tunnel and an underground construction model testing system. The fully automatic true-triaxial tunnel comprises a triaxial loading device used for carrying out loading on a model test piece, a data automatic collecting and analyzing device, a power system and a control system, wherein the triaxial loading device comprises a test bed, a vertical loading system, a horizontal forward and backward loading system and a horizontal leftward and rightward loading system; the vertical loading system, the horizontal forward and backward loading system and the horizontal leftward and rightward loading system apply triaxial pressure to a model test body; the test bed has the effects of supporting, fixing and providing counter-force; the data automatic collecting and analyzing device comprises an optical fiber sensor embedded in the model test piece, an optical fiber monitoring system, a micro pressure box and a strain block, can realize the collection of multi-field information, such as model stress, displacement and seepage pressure, realizes information real-time automatic collection through a computer program, and realizes real-time data logging, analysis, drawing and early warning processing on multi-physical field information; the power system provides power required for the proceeding of testing; the control system controls the loading force of the vertical loading system, the horizontal forward and backward loading system and the horizontal leftward and rightward loading system and controls the test bed.

Description

technical field [0001] The invention discloses a fully automatic true triaxial tunnel and underground engineering model test system. Background technique [0002] With the rapid development of energy engineering and traffic engineering, the number of tunnels and underground projects is increasing, and the scale is also increasing, which will lead to more and more difficult engineering construction. During the construction of tunnels and underground projects, faults, karst caves, underground rivers and other unfavorable geology are often encountered. Due to the physical and chemical effects of water bodies on rocks, the grade of surrounding rocks in tunnels drops sharply. The support design is difficult to maintain the stability of the surrounding rock, and landslides and water and mud inrush disasters are prone to occur in the tunnel. Water inrush disasters in tunnels will cause delays in the construction period, damage to machinery and equipment, and increase in investment...

AI Technical Summary

Problems solved by technology

[0004] (1) Due to the defects of the loading device in some model test systems, the stress on the specimen will be uneven, and unnecessary shear stress will be generated on the surface of the specimen, which will affect the accuracy and reliability of the test results

[0005] (2) The loading capacity of some model test systems is low, such as flexible bladder or hydraulic pillow loading, which cannot provide a large enough load to simulate the high ground stress state of deep buried rock mass

[0006] (3) The model test system is cumbersome, requires a lot of manpower and material resources, and cannot be automated.

[0007] (4) There is a lack of a tunnel water inrush disaster precursor information monitoring model test system, so as to understand the evolution process of water inrush dynamic disasters in rich water tunnels and the multiple precursor information of water inrush disasters

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