Device and method for lining construction in partial excavation model test of multi-arch tunnel

Abstract

The invention discloses a lining construction device and method in the partial excavation model test of a multi-arch tunnel, which solves the problems of difficult manual smearing and poor construction quality in the model test in the prior art, and has the ability to ensure lining construction simulation Accuracy and quality can realize the beneficial effect of lining construction simulation in the depth of the cavern. The scheme is as follows: a lining construction device in the partial excavation model test of multi-arch tunnel, including a fixed platform; a mechanical arm, the mechanical arm is supported on a fixed platform, and the mechanical arm can move forward or backward relative to the fixed platform, the end of the mechanical arm is connected to one end of the pouring sleeve, the pouring sleeve can pass into the lining similar material, and the pouring sleeve is relative to the cavern to be supported The distance can be adjusted; the lining formwork, the other end of the pouring casing extends into the lining formwork, the outer shape of the lining formwork is consistent with the shape of the cavern to be supported, and the lining formwork has several holes for spraying lining similar The lining window of the material, and the pouring sleeve is capable of communicating with at least part of the lining window.

Description

technical field [0001] The invention relates to the field of geotechnical engineering, in particular to a lining construction device and method for partial excavation model tests of multi-arch tunnels. Background technique [0002] Physical model test is a physical simulation method using scaled-scale models to study engineering construction based on the principle of similarity. It has become one of the commonly used scientific research methods in geotechnical engineering, tunnel engineering and other disciplines. The use of model tests to simulate tunnel engineering mainly includes the following steps: Prepare similar materials, fill and compact similar materials, bury monitoring components, continue to fill similar materials, section excavation and support, and collect monitoring information. [0003] Double-arch tunnel is one of the commonly used tunnel structures. Due to its large excavation section, the actual construction often adopts double-side wall pilot pit method,...

AI Technical Summary

Problems solved by technology

[0004] 1. At present, in the excavation model tests of large-section tunnels, the method of artificially applying similar lining materials on the inner wall of the excavation cavity is often used to simulate the tunnel lining construction. 50, 1:100 scale model), when the multi-arch tunnel adopts the partial excavation method, the section space of each pilot tunnel is narrow and the shape is different, and the method of manual smearing is difficult to implement;

[0005] 2. It is difficult to ensure the uniform thickness of the lining and the quality of the construction by manually applying similar materials for the lining. When the adhesion between the similar lining materials and the similar materials of the tunnel surrounding rock is not good, it is easy for the similar lining materials to fall off, which seriously affects progress of model testing;

[0006] 3. When the depth of the tunnel model cavity is large, it is difficult to implement similar lining materials in the depth of the model cavity, and it is not easy to observe the lining construction

Images