Stratum simulation and loading test device used for multi-ring shield tunnel structure

Abstract

The invention relates to a stratum simulation and loading test device used for a multi-ring shield tunnel structure. The device includes a self-balancing load bearing module and stratum simulation andresistance loading modules. The self-balancing load bearing module includes a hoop beam, a circular baffle, a center ring and standing columns. The hoop beam, the circular baffle and the center ringare concentrically arranged to form an outer-medium-inner three-layer load bearing framework. The standing columns are multiple, and are uniformly fixed onto the hoop beam. The standing columns, the circular baffle and the center ring are fixedly connected through pulling rods. The stratum simulation and resistance loading modules are multiple, and are arranged in matching with the standing columns. Each stratum simulation and resistance loading module includes a jack, a rigid thruster and a load distribution unit. One end of the jack is connected with a standing column, and the other end is connected with the circular baffle, the rigid thruster and the load distribution unit in turn. Compared with the prior art, the device has advantages such as the advantages that jack thrust can be converted into uniformly distributed loads, and stress performance and reinforcement effect tests of various-structure shield tunnels can be simulated.

Description

technical field [0001] The invention relates to a stratum simulation and loading test device, in particular to a stratum simulation and loading test device for a multi-ring shield tunnel structure. Background technique [0002] Indoor model testing has always been an important research method in the field of tunnel engineering research. Under the premise of satisfying a certain similarity principle, the model test can reflect the mechanical properties of the tunnel structure more conveniently, comprehensively, intuitively and accurately compared with the field test and numerical calculation. It plays a guiding role in exploring the mechanism of underground engineering and engineering practice. [0003] With the continuous expansion of the scale of subway transportation construction, more and more cities are carrying out subway construction, and the proportion of shield tunnels in subway routes is increasing. The subway shield tunnel is in a certain engineering geological en...

AI Technical Summary

Problems solved by technology

In this patent, the loading point is relatively concentrated on the tunnel structure pressure, which cannot simulate the uniform load on the actual tunnel structure; secondly, the device also does not consider the interaction relationship between the structure and the ground, and cannot control the force of the tunnel structure. Finally, the device is also a full-scale full-scale test device, which is expensive, cumbersome, and difficult to operate. Moreover, the test is a test of the ultimate bearing capacity of the tunnel structure, and even has certain safety hazards.

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