Hydraulic pressure and soil pressure independently loaded shield tunneling structure prototype experiment apparatus

Abstract

The invention discloses a shield tunnel structure prototype test apparatus is provided with the water-pressure, earth-pressure independent loading capability. The composing of the apparatus is as follows: a. for a earth-pressure loading apparatus, four split beams are equally arranged on the outer surface of the horizontal shield tunnel structure prototype; each opposite two split beams are mutually connected through split anchor cables and jacks in series; b. for a water-pressure loading apparatus, a hoop beam is arranged on the outer surface of the horizontal shield tunnel structure prototype; one end of two or more than two hoop anchor cables is fixed on one side of the hoop beam and the other end is fixed on the other side after winding the tunnel surface by one coil and threading jacks; and c. strain gauges are stuck onto the inner and outer surfaces of the tunnel structure prototype of the test apparatus and a displacement meter is arranged on the inner surface; the strain gauges and displacement meter are arranged on the outside to be electrically connected with a data processing and control device. The test apparatus can realize the separation and simultaneous loading of the water-pressure and earth-pressure of the tunnel structure prototype and the load can be independently adjusted so as to analyze and test the impact on the shield tunnel structure prototype by the arbitrary combination of water-pressure and earth-pressure.

Description

technical field [0001] The invention relates to a shield tunnel structure prototype test device, in particular to a shield tunnel structure prototype test device independently loaded by water pressure and earth pressure. Background technique [0002] The research on the mechanical properties of the shield tunnel structure prototype is an important task to ensure the safety and smooth progress of the tunnel construction, and it is usually carried out through simulation tests. Underground tunnel structures are usually affected by two forces, earth pressure and water pressure, and the correlation between these two forces is poor. Therefore, in order to simulate and test various mechanical characteristics of the proposed tunnel structure more realistically, water pressure and earth pressure must be independently applied to the tunnel structure. Existing simulation test devices for tunnel structure prototypes, such as: the simulation device for the shield tunnel-soil complex in ...

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Problems solved by technology

Existing simulation test devices for tunnel structure prototypes, such as: the simulation device for the shield tunnel-soil complex in the subway single-line section conducted by the Japan Civil Engineering Research Institute, uses three rings to assemble the tunnel structure specimens with staggered seams, and the test The parts are placed on the ground, and the soil pressure is loaded on the tunnel structure with the 6-point concentrated loading method, but the influence of water pressure on the tunnel structure is not simulated

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