A CRD method model test device

Abstract

The invention relates to the technical field of CRD construction model test, and discloses a CRD method model test device, which solves the problem that the actual construction process of the CRD method cannot be truly simulated at present, the excavation speed and footage cannot be quantitatively and accurately controlled, and the simultaneous To study the deformation and damage of the support structure and the influence of different stiffnesses, it includes a model box, the middle part of one end of which is movably connected with a glass plate. length to simulate the length of the unsupported section, if the right end of each excavation block is flush with the right end of the supporting pipe, then simulate the situation of immediate support after tunnel excavation, through the longitudinal length of the four parts on the right side of the supporting pipe To simulate the longitudinal spacing of each excavation part, the actual construction process of the CRD method can be simulated; the excavation speed can be accurately controlled by selecting the same motor speed, and the excavation footage can be controlled by observing the scale marks on the threaded rod.

Description

technical field [0001] The invention belongs to the technical field of CRD construction model test, in particular to a CRD method model test device. Background technique [0002] With the rapid development of the transportation industry, my country has become a veritable tunnel country, and a series of tunnel construction methods suitable for different conditions have been formed. When the tunnel section is large, the CRD method is usually used for construction. The full name of the CRD method is the cross-middle partition method. It is a tunnel construction method suitable for weak surrounding rocks. During construction, the entire tunnel section is divided into four small sections, which is beneficial to control the deformation of the surrounding rock. [0003] Due to the complexity and uncertainty of tunnel engineering, it is inevitable that the surrounding rock and supporting structure will be deformed or even destroyed when the CRD method is used for construction. There...

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Problems solved by technology

[0004] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a CRD method model test device, which effectively solves the problem that the actual construction process of the CRD method cannot be truly simulated at present, and the excavation speed and footage cannot be quantitatively and accurately controlled. , and the problem that it is impossible to study the deformation and failure of the supporting structure and the influence of different stiffnesses at the same time

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