Tunnel granular soil surrounding rock and barn effect test platform

Abstract

The invention belongs to the granular soil mechanics research field and relates to a tunnel granular soil surrounding rock and silo effect test platform. A test cabin is a rectangular box body; the bottom of the front side surface and the bottom of the rear side surface of the box body are provided with movable doors respectively; baffles are installed at the movable doors; the two end surface and bottom inner wall of the test cabin are provided with grilles; a groove is formed in each grid of the grilles; and measuring devices are arranged in the grooves. The tunnel granular soil surrounding rock and silo effect test platform of the invention is used for the measurement and observation of parameters and phenomena such as the bottom pressure, lateral pressure and lateral pressure coefficient of soil, an anchor friction coefficient, interaction between surrounding rock and a tunnel and a silo effect. With the test platform adopted, the construction and operation phases of an underground structure can be simulated, and accurate results can be obtained so as to be applied to actual engineering and research.

Description

technical field [0001] The invention belongs to the field of granular soil mechanics research and relates to a tunnel granular soil and barn effect experimental platform. Background technique [0002] Particulate matter is a kind of material form that exists in nature and daily life and is often seen, such as sand, stones, soil, snow particles, etc. in nature, sugar, salt, grain, etc., and industrial Commonly seen in production are medicines, ores, etc. In mechanics, granular matter is defined as a material system composed of a large number of particles connected in various complex ways, and the diameter of the particles in this system is greater than 1 μm. [0003] In recent years, with the rapid development of my country's national economy, more and more attention has been paid to the development and utilization of urban underground space. More and more cities have planned and built a large number of underground engineering facilities such as underground railways, municip...

AI Technical Summary

Problems solved by technology

[0005] In the field of scientific research, the mesoscopic mechanical properties and migration laws of the stability of the granular soil surrounding rock are still uncertain; the mesoscopic failure mechanism of the granular surrounding rock of the tunnel under the partial excavation method of the granular surrounding rock is less studied; The nature of the surrounding rock The evolution mechanism of the surrounding rock collapse pressure arch is not clear; the location and timing of the surrounding rock failure cannot be accurately judged, etc.

At present, the calculation of the load of granular surrounding rock is mainly based on the theory of loose body pressure, but when the theory is derived, many assumptions are artificially stipulated, resulting in a large difference between the calculated result and the actual load of the surrounding rock.

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