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Active stress eliminating device for loose sand and gravel geology tunnel construction

A tunnel construction and active stress technology, which is applied in tunnels, tunnel linings, underground chambers, etc., can solve the problems of loose sand and pebble structures and a large number of potholes, and achieve rapid and effective support, avoid slippage, and improve friction Effect

Inactive Publication Date: 2018-10-26
NANJING SOUTHEAST BUILD ELECTROMECHANICAL SEISMIC RES INST
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  • Abstract
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Problems solved by technology

[0004] Due to the loose structure of loose sand and pebbles, compared with other terrains, after loose sand and pebbles are geologically opened, a large number of potholes are more likely to appear on the inner wall of the tunnel. Traditional support devices cannot quickly achieve effective support, so there is an urgent need for loose sand and pebbles. Active Stress Relief Device for Geological Tunnel Construction

Method used

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  • Active stress eliminating device for loose sand and gravel geology tunnel construction
  • Active stress eliminating device for loose sand and gravel geology tunnel construction
  • Active stress eliminating device for loose sand and gravel geology tunnel construction

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Embodiment Construction

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention.

[0037] see Figure 1-6 , the present invention provides a technical solution: an active stress relief device for the construction of loose sand and pebble geological tunnels, comprising a stilling arch 1, two ends of the stilling arch 1 are respectively welded with two upper positioning feet 2 On the surface, the stilling arch 1 is provided with joints 3 arranged around the center of the stilling arch 1. The joints 3 are used to connect adjacent stilling arches 1, and the stilling arch 1 is provided with Anchor hole 4, anchor hole 4 is used for the anchor rod to realize the positioning between the stilling arch 1 and the inner wall of the tunnel, which belongs to the w...

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Abstract

The invention discloses an active stress eliminating device for loose sand and gravel geology tunnel construction, and relates to the technical field of tunnel construction. The active stress eliminating device for loose sand and gravel geology tunnel construction comprises a baffle arch, the upper surfaces of two locating feet are welded to the two ends of the baffle arch respectively, the bafflearch is provided with seams circumferentially arranged by taking the center of the circle of the baffle arch as the center, anchor holes are formed in the baffle arch which is internally provided with a cavity, 13 export holes communicated with the cavity are formed in the middle of the outer side face of the baffle arch, and inclined holes communicated with the cavity are formed in the portions,corresponding to the export holes, of the back and the front of the baffle arch. According to the active stress eliminating device for loose sand and gravel geology tunnel construction, by means of aspecial-shaped transmission bag in a pneumatic extrusion mechanism, an extrusion stem and an injection mechanism can be pushed, the inner wall of a tunnel is rapidly and effectively supported, and the influence of stress on tunnel inner wall structure is rapidly reduced.

Description

technical field [0001] The invention relates to the technical field of tunnel construction, in particular to an active stress relief device for loose sand and pebble geological tunnel construction. Background technique [0002] Excavating tunnels in different regions will encounter various terrains. Some terrains are conducive to tunnel construction, while others will bring great difficulties to tunnel construction. For example, tunnel construction in loose sand and pebble geology. After the tunnel is dug into a hole, the loose sand and pebbles on the tunnel wall are under enormous stress, and the tunnel is prone to loose deformation and collapse, threatening the safety of workers. [0003] Chinese patent (authorized publication number CN 204591296 U) discloses a tunnel support structure, which uses a frame body and a hydraulic support device to provide stable and uniform support for the tunnel; another example is the Chinese patent (authorized publication number CN206111211...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D11/18E21D11/10
CPCE21D11/105E21D11/18
Inventor 黄建国
Owner NANJING SOUTHEAST BUILD ELECTROMECHANICAL SEISMIC RES INST
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