Method for inversely calculating parameters of super-large-diameter shield tunnel segment joint

A shield tunnel segment and tunnel segment technology, which is applied in the field of inverse calculation of super large diameter shield tunnel segment joint parameters, can solve the problems of high cost and achieve the effect of avoiding test errors and obvious economic benefits

Active Publication Date: 2015-05-13
SHANGHAI TUNNEL ENGINEERING RAILWAY TRANSPORTATION DESIGN INSTITUTE
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Problems solved by technology

Among them, since the full-scale test is an experimental study using a 1:1 model that is exactly the same size as the actual segment, this test can best reflect the real situation of the joint, but it is expensive. For the segment of a super-large diameter shield tunnel Connectors are not suitable for this type of experimental study

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  • Method for inversely calculating parameters of super-large-diameter shield tunnel segment joint

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Embodiment

[0016] Embodiment: This embodiment specifically relates to a method for inversely calculating segment joint parameters of a super-large-diameter shield tunnel. By comparing the test results of the existing reduced-scale model and the full-scale model, the method obtains two different diameters. The correction coefficient of the tunnel segment joint mechanical parameters of the scale model is applied to the scaled-down test results of other super-large-diameter shield tunnels according to the linear relationship, and the corresponding super-large-diameter shield tunnel lining joint design parameters are inverted. The concrete steps of this method are as follows:

[0017] (1) Carry out the same kind of scale-down test of tunnel segments with two diameters (15m and 20.2m) at a ratio of 1:3. These two kinds of eccentric compression tests are routine tests in this field, so they will not be repeated here; Results The bending moment transfer coefficient ζ of the 15m diameter tunnel...

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Abstract

The invention discloses a method for inversely calculating parameters of a super-large-diameter shield tunnel segment joint. By comparing a test result of an existing reduced-scale model and a test result of a full-scale model, tunnel segment joint mechanical parameter correction coefficients of the two different scale models of the diameter are obtained, and according to the linear relation, the coefficients are applied to reduced-scale test results of other super-large-diameter shield tunnels for inversely calculating design parameters of the corresponding super-large-diameter shield tunnel lining joint. The method has the advantages that the existing test results are fully utilized, by means of an indirect test mode, the segment joint mechanical parameters of full-size tests of shield tunnels with the different diameters can be derived, the situation that large-diameter full-size tests are directly carried out is avoided, and the method brings remarkable economic benefits; for the obtained mechanical parameter correction coefficients, test errors caused by the different diameters and different reduced-scales can be avoided relatively.

Description

technical field [0001] The invention belongs to the technical field of tunnel segments, and in particular relates to a method for back-calculating segment joint parameters of a super-large-diameter shield tunnel. Background technique [0002] The shield tunnel lining ring structure is generally a segment ring assembled from several arc-shaped segments, and the joints between the segments and the joints between the rings are connected by bolts or other methods. According to the comparative study of relevant engineering tests and calculation results, the connection structure and mechanical properties of the joints strongly affect the internal force distribution and deformation of the lining ring, so it is particularly important for the research and calculation of the parameters of the tunnel segment joints. [0003] At present, the research methods of tunnel segment joints mainly include full-scale test research, model test research and finite element analysis. Among them, si...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00
Inventor 杨志豪徐薇娜许熠管攀峰顾闻
Owner SHANGHAI TUNNEL ENGINEERING RAILWAY TRANSPORTATION DESIGN INSTITUTE
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