Fabricated light inverted arch web formwork and construction method thereof

Abstract

The invention belongs to the field of tunnel engineering, and particularly discloses a fabricated light inverted arch web formwork and a construction method for tunnel inverted arch construction through the formwork. The light inverted arch web formwork comprises a first turnover web formwork, a second turnover web formwork, a plurality of longitudinal beam bases arranged in the longitudinal depth direction of an inverted arch and at least one formwork turnover folding and unfolding device; and the first turnover web formwork and the second turnover web formwork are correspondingly formed by assembling a plurality of small formworks. According to the fabricated light inverted arch web formwork, the single formwork is small in size and light in weight, the fitting degree of the fabricated light inverted arch web formwork and a foundation pit can be conveniently adjusted, the occupied space of a tunnel is reduced, the influence on construction of other types of work in the tunnel is reduced, and transferring is convenient; no formwork is arranged in the middle of the inverted arch, so that a rough surface is naturally formed after concrete pouring in the middle of the inverted arch, and bonding of new concrete and old concrete after a subsequent concrete secondary pouring procedure is facilitated; and the demolding process of the formwork is simple and easy to implement, and a complex demolding device is omitted.

Description

technical field [0001] The invention belongs to the field of tunnel construction, and more specifically relates to an assembled lightweight invert web formwork and a construction method thereof. Background technique [0002] In recent years, my country's tunnel construction technology has been continuously developed; the inverted arch is an important part of the tunnel structure as a reverse arch structure installed at the bottom of the tunnel to improve the stress conditions of the upper support structure of the tunnel. The construction quality and construction speed of the inverted arch will directly affect the safety and construction period of the entire tunnel construction. At present, the inverted arch belly formwork commonly used in the market is a full-width integral arc-shaped steel formwork. Because it is manufactured as a whole, its fit with the foundation pit is poor during the construction of the inverted arch, which affects the construction quality of the invert...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the above defects or improvement needs of the prior art, the present invention provides an assembled light-weight invert soffit formwork and a construction method for tunnel invert construction using the light-weight invert soffit formwork; wherein The method of splitting the invert soffit formwork into multiple assembled small formworks can effectively solve the problem of large size and heavy weight of the invert soffit formwork in the prior art; in addition, by not setting The middle formwork makes the concrete in the middle of the inverted arch naturally form a rough surface after pouring, which can effectively solve the problem that it is not easy to bond with the secondary poured concrete; on this basis, by designing the structure of the formwork connection part, it can be effectively Solve the problem of complex demoulding methods

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