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Tunnel lagging jack and construction method thereof

A construction method and technology for tunnels, which are applied in tunnels, tunnel linings, and earth-moving drilling and mining, etc., can solve the problems of high storage and transportation difficulty, rigid support vault pressure, and complicated steel arch fabrication, etc. The strength of the arch frame and the effect of shortening the construction period

Inactive Publication Date: 2021-04-02
CHINA 19TH METALLURGICAL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The one-piece steel arch frame is more complicated to manufacture, and it is more difficult to store and transport. Special equipment is required for transportation and erection when splicing.
In the spliced ​​steel arch frame, there will be a problem that the adjacent arch brackets are not tightly spliced ​​due to insufficient arc and verticality of the arch brackets, which reduces the supporting effect.
[0004] The above two types of arches cannot guarantee sufficient rigidity to support the pressure of the vault in the ultra-high ground stress area of ​​the tunnel or the extremely broken rock mass area of ​​the shallow buried section, and often have certain limitations.

Method used

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  • Tunnel lagging jack and construction method thereof
  • Tunnel lagging jack and construction method thereof
  • Tunnel lagging jack and construction method thereof

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Embodiment Construction

[0027] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0028] As shown in the drawings, the tunnel arch frame of the present invention includes several segmental arch frames 1, and several segmental arch frames 1 are connected to form a tunnel arch frame. The segmental arch frame 1 is a tubular structure, and the segmental arch frames The end of the segmented arch 1 where the frame 1 and the segmented arch 1 meet is provided with a connecting plate 2 , and the segmented arch 1 and the segmented arch 1 are connected through the connecting plate 2 . The structure of the tunnel arch is set in a tubular shape, so that prestressed components, such as bellows 5 and prestressed steel wire bundles, can be arranged in the tube of the segmented arch 1, so that the tunnel arch can be prestressed and the tunnel arch can be guaranteed. Rigidity and strength, to further improve the stability of the tunnel arch, the segme...

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Abstract

The invention discloses a tunnel lagging jack and a construction method thereof, and relates to the technical field of tunnel engineering composite lining construction. The tunnel lagging jack comprises a plurality of segmental lagging jacks, the segmental lagging jacks are connected to form the tunnel lagging jack, each segmental lagging jack is of a tubular structure, a connecting plate is arranged at the end part of the joint of every two segmental lagging jacks, and the segmental lagging jacks are connected through the connecting plates; and corrugated pipes penetrate into pipes of the tunnel lagging jack, prestress steel wire bundles penetrate into the corrugated pipes, and concrete is poured between the outer walls of the corrugated pipes and the inner walls of the segmental laggingjacks. The tunnel lagging jack is made of steel pipes, so that the strength and rigidity of the lagging jack can be effectively improved; concrete is injected into the steel pipes to further improve the strength and rigidity of the steel pipes; meanwhile, the corrugated pipes and prestress steel wire bundles can be arranged in the steel pipes, prestress is provided for the whole lagging jack, andthen the strength and rigidity of the tunnel lagging jack are further improved; and by the adoption of the tunnel lagging jack construction method, construction is orderly, and the construction periodis shortened.

Description

technical field [0001] The invention relates to the technical field of tunnel engineering composite lining construction, in particular to a tunnel arch frame and a construction method thereof. Background technique [0002] With the continuous expansion of the scale and speed of road traffic construction in our country, tunnel engineering has become one of the very important construction links. During the tunnel construction process, it is necessary to use steel arches for the initial support of the tunnel. To ensure the safety and stability of the construction, it is necessary to ensure the strength of the steel arch. [0003] The traditional steel arch has two structures, one is a semi-circular steel arch, and the other is a circular arch straight wall steel arch. The round arch straight wall steel arch frame is generally composed of three steel brackets, that is, the top semicircular bracket and the vertical side wall brackets on both sides. The specifications of the top...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D11/18E21D11/10E21D11/00
CPCE21D11/18E21D11/10E21D11/003
Inventor 倪志勇李栋栋王刚王光云程仕亿
Owner CHINA 19TH METALLURGICAL CORP
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