Telescopic lining structure testing device for testing characteristic curve of tunnel surrounding rock

Abstract

The invention discloses a telescopic lining structure testing device for testing a characteristic curve of tunnel surrounding rock, is used in a variable stiffness simulation experiment of a telescopic indirect simulation tunnel lining for obtaining lining structure internal force and a surrounding rock-support characteristic curve. An upper arc sheet 1 and a lower arc sheet 2 both made of an aluminium alloy material are rolled to form a test cylinder. Edges of the upper arc sheet 1 and the lower arc sheet 2 are provided with U-shaped grooves, and the two arc sheets are movably connected at an equal interval through the U-shaped grooves adopting bolts. The upper arc sheet 1 and the lower arc sheet 2 have a transverse edge curve of a simulated practical tunnel. In the test, stress sheets and pressure boxes are arranged on inner and outer layers of a middle ring of the cylinder. According to the invention, a once-molded lining can be repeatedly applied to tunnel model tests, so that previous phenomena that a gypsum lining is adopted, multiple models are required once, a lot of labor, money and time is required are prevented. Simple and effective operability of a model test can be achieved through low cost, material waste is prevented, and test cost is lowered.

Description

technical field [0001] The invention relates to the field of tunnel model tests, in particular to related model tests of expansive soil tunnels. Background technique [0002] With the development of highways and high-speed railways, more and more tunnels pass through complex geological formations, and the internal forces of structures need to be verified urgently. The method is often to analyze and verify through a large number of model tests to obtain relevant laws. The production of model tests often uses gypsum lining models, which are inefficient and easily damaged. One test requires multiple models, and there are differences between each model, resulting in waste of capital and man-hours. Contents of the invention [0003] In view of the above deficiencies in the prior art, the purpose of the present invention is to use the same model as far as possible to solve the application of the resistance characteristic curve of the surrounding rock support of expansive soil tu...

AI Technical Summary

Problems solved by technology

The production of model tests often uses gypsum lining models, which are inefficient and easy to damage. Multiple models are required for one test, and there are differences between each model, resulting in waste of capital and man-hours

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