Airbag type inner framework form traveler and primary tunnel supporting shotcrete construction method

Abstract

The invention discloses an airbag type inner framework from traveler and a primary tunnel supporting shotcrete construction method. The form traveler comprises a movable supporting framed bent, an inflatable formwork located on the outer side of the movable supporting framed bent, and a retractable supporting device for supporting the inflatable formwork, and the retractable supporting device is installed on the movable supporting framed bent and located on the inner side of the inflatable formwork. The construction method includes the steps: firstly, forwarding the airbag type inner framework from traveler in place; secondly, performing primary tunnel supporting shotcrete construction; thirdly, performing primary tunnel supporting shotcrete construction on a next tunnel section; fourthly, repeating the third step for multiple times till the primary tunnel supporting shotcrete construction process of all the tunnel sections is finished. The airbag type inner framework from traveler is reasonable in design, simple to construct and good in using effect, resilience rate of primary tunnel supporting shotcrete is effectively controlled through an airbag type inner framework, construction efficiency is high, construction period is short, construction quality is high, and zero resilience rate of primary tunnel supporting shotcrete can be realized.

Description

technical field

[0001] The invention belongs to the technical field of tunnel construction, and in particular relates to a mobile mold base for an airbag inner mold and a construction method for sprayed concrete for primary support of a tunnel. Background technique

[0002] The shotcrete construction technology has been widely used in the initial support of tunnel construction, and is an important part of the anchor shotcrete support in the new Austrian method construction. In terms of technology, shotcrete is divided into four types: dry spraying, tidal spraying, wet spraying and mixed spraying. Because the strength of dry spraying can only reach about 15MPa, and the working environment at the construction site is poor, labor intensity is high, and material waste is large. The production efficiency is low, and it can no longer adapt to the current production technology requirements, so the dry spraying process has faded out of the construction site. The wet spraying proces...

Examples

Embodiment Construction

[0092] Such as figure 1 As shown, the mobile formwork of the airbag inner mold according to the present invention includes a movable support bent frame 1 capable of moving back and forth in the tunnel hole of the constructed tunnel, an inflatable formwork positioned outside the movable support bent frame 1 and a The telescopic support device for supporting the inflatable formwork, the telescopic support device is installed on the mobile support bent frame 1 and is located inside the inflatable formwork.

[0093] The inflatable template is located inside the arch wall of the tunnel hole and has the same shape as the cross-sectional shape of the arch wall. The inflatable formwork includes an airbag inner mold and a formwork support supported inside the airbag inner mold, the airbag inner mold is an arch formwork, and the formwork support is an arch inner support. The airbag inner mold includes a top formwork located directly below the arch of the tunnel and two symmetrically ar...

technical field

[0001] The invention belongs to the technical field of tunnel construction, and in particular relates to a mobile mold base for an airbag inner mold and a construction method for sprayed concrete for primary support of a tunnel. Background technique

[0002] The shotcrete construction technology has been widely used in the initial support of tunnel construction, and is an important part of the anchor shotcrete support in the new Austrian method construction. In terms of technology, shotcrete is divided into four types: dry spraying, tidal spraying, wet spraying and mixed spraying. Because the strength of dry spraying can only reach about 15MPa, and the working environment at the construction site is poor, labor intensity is high, and material waste is large. The production efficiency is low, and it can no longer adapt to the current production technology requirements, so the dry spraying process has faded out of the construction site. The wet spraying proces...

Examples

Embodiment Construction

[0092] Such as figure 1 As shown, the mobile formwork of the airbag inner mold according to the present invention includes a movable support bent frame 1 capable of moving back and forth in the tunnel hole of the constructed tunnel, an inflatable formwork positioned outside the movable support bent frame 1 and a The telescopic support device for supporting the inflatable formwork, the telescopic support device is installed on the mobile support bent frame 1 and is located inside the inflatable formwork.

[0093] The inflatable template is located inside the arch wall of the tunnel hole and has the same shape as the cross-sectional shape of the arch wall. The inflatable formwork includes an airbag inner mold and a formwork support supported inside the airbag inner mold, the airbag inner mold is an arch formwork, and the formwork support is an arch inner support. The airbag inner mold includes a top formwork located directly below the arch of the tunnel and two symmetrically ar...

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