Model test device for researching floating form of shield tunnel segment

Abstract

The invention provides a model test device for researching the floating form of a shield tunnel segment, the device comprises a box body assembly, a segment lining assembly, a shield shell structure, a grouting assembly and a traction assembly, the segment lining assembly comprises a plurality of segment rings and joint structures connected between two adjacent segment rings; a segment ring of the segment lining assembly and a prototype segment ring have a certain geometric similarity ratio, and the segment ring and the prototype segment ring have the same apparent specific gravity. The joint structure is a flexible annular structure, and the shear stiffness of the joint structure is equal to the sum of the shear stiffness of all the longitudinal joints between the two adjacent prototype segment rings; the grouting assembly comprises a grouting pipe, and the grout outlet end of the grouting pipe extends to the tail of the shield shell structure. According to the invention, the process that the duct piece is separated from the shield tail and is contacted with the synchronous grouting slurry can be simulated, and the floating posture change condition of the duct piece lining assembly wrapped by the synchronous grouting slurry can be reflected more accurately.

Description

technical field [0001] The invention relates to the technical field of shield tunnel models, in particular to a model test device for studying the floating form of shield tunnel segments. Background technique [0002] The shield method is a fully mechanized construction method in the construction of the underground excavation method. It pushes the shield machine in the ground, and supports the surrounding rocks through the shield shell and segment to prevent the collapse into the tunnel. It is a mechanized construction method in which the soil is excavated with a cutting device in the front, transported out of the hole by an excavation machine, and pushed in by a jack at the rear, and the precast concrete segments are assembled to form a mechanized construction method of the tunnel structure. After more than 200 years of evolution and development, the shield construction method and technology are now very mature, which can realize mechanized construction and less disturbance...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a model test device for studying the floating form of shield tunnel segments, so as to solve the technical problem that the existing test devices in the prior art cannot truly reflect the actual floating form of the segment out of the shield tail

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