Mining method tunnel second lining embedded sliding groove fixing structure and application method

Abstract

The invention provides a mining method tunnel secondary lining embedded chute fixing structure which is composed of an embedded chute, an anchoring section and a screw rod, the anchoring section is fixedly connected with the embedded chute, a through hole is formed in the anchoring section, an internal thread is arranged on the through hole, and one end of the screw rod is sleeved with the anchoring section in a threaded mode. During use, an operator does not need to enter a steel reinforcement framework for mounting and positioning any more, the pre-embedded sliding groove is fixed to the formwork through the positioning hole from the outer side of the formwork by means of a screw, the screw penetrates into the anchoring section and is not exposed, and after the whole formwork ring is unfolded, the second lining trolley retreats to the second lining construction joint of the previous plate, and the construction efficiency is improved. The installation and rotation process is short in time, time-saving, labor-saving and convenient to install, meanwhile, positioning holes in the formwork are used for positioning control, positioning is accurate, construction quality is guaranteed, the structure is simple, site construction storage is facilitated, site construction installation is also facilitated, construction is convenient and rapid, the construction period is shortened, and economic benefits are improved.

Description

technical field [0001] The invention belongs to the technical field of tunnel construction such as railways, highways, and municipal administration, and in particular relates to a second lining pre-buried chute fixing structure of a mining tunnel and an application method thereof. Background technique [0002] In today's tunnel construction process, in order to facilitate the installation of tunnel cables, water pipes, catenary, lighting facilities and other equipment in the later stage, the chute is often pre-buried in advance during the construction of the second lining of the tunnel, so the chute construction is an important link in the tunnel construction . The current tunnel pre-embedded chute construction is mainly to fix the chute on the steel formwork trolley or the surface of the combined steel formwork formwork. The above method can realize the pre-embedded construction of the chute, but there are many problems in the construction of the above-mentioned process. ...

AI Technical Summary

Problems solved by technology

[0005] 1. The PVC outer sleeve at the anchorage end of the chute cannot be disassembled, and the PVC sleeve and spring will remain inside the concrete structure, forming a weak point in quality;

[0006] 2. It is very difficult for personnel to enter the second lining steel bar

Affected by the distance between the main reinforcement of the second lining and the hook reinforcement (quincunx arrangement) between the main reinforcements, it is difficult for construction personnel to enter the interior of the reinforcement skeleton, which takes a long time and is difficult to install the chute; the longitudinal and circumferential positioning accuracy of the chute is extremely poor;

[0007] 3. The positioning of the chute is greatly affected by the installation position of the second lining steel bar. Due to the large positioning error of the second lining steel bar, the positioning of some chute cannot be close to the second lining formwork, which affects the positioning of the chute

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