Trial model capable of simulating shield tunnel pipe slice joint and manufacturing method thereof

Abstract

The present invention discloses a test model which can simulate the pipe sheet joint of the shield tunnel and a preparing method thereof. The test sample is a pipe which is cut along the annular direction and direction of longitudinal axis on the circumferential surface to correspondingly form an annular joint and a longitudinal joint. According to the invention through cutting in annular direction and direction of longitudinal axis, the longitudinal joint and longitudinal joint are formed on the surface of model thereby that the annular joint and longitudinal joint of pipe sheet on the tunnel structure can be simulated, and the effect of tunnel joint to the stiffness of tunnel can be truly reflected. Additionally, the machine can be used for realizing cutting. Not only the former time-wasting and strength-wasting artificial assembling is replaced, but also the test error can be reduced.

Description

technical field [0001] The invention belongs to the field of tunnel structure model tests, in particular to a test model capable of simulating segment joints of shield tunnels. [0002] The invention also relates to a manufacturing method of a tunnel test model, in particular to a manufacturing method of a test model capable of simulating shield tunnel segment joints. Background technique [0003] In the shield tunnel model test, how to simulate the tunnel segment structure is an important issue. The actual shield tunnel segment structure is made of concrete segments connected by bolts, thus forming the longitudinal seam and ring seam of the shield tunnel. [0004] In traditional model tests, there are two commonly used test models for simulating shield tunnel structures: the test model is composed of circular tubes with uniform materials; or it is assembled from small segments, and the segments are connected by small screws. [0005] Correspondingly, there are two methods...

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Problems solved by technology

[0006] The disadvantages of these two models and methods are: the test model made by the first method cannot consider the influence of tunnel segment joints because it does not simulate the longitudinal and annular seams formed by the segment in the actual tunnel, or can only pass the stiffness The reduction method reduces the strength of the material. Therefore, the internal force and deformation law of the tunnel segment obtained by the model test are quite different from those of the prototype tunnel.

Although the method used in the second test model is to assemble small segments, this method can simulate the existence of segment joints, but the processing, production and assembly of tunnels consume a lot of manpower and time, and the accuracy of assembly is also low. It will be affected by human factors, which will bring large errors to the test

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