Production process for prefabricated reinforced concrete duct pieces

Abstract

The invention discloses a production process for prefabricated reinforced concrete duct pieces. The production process comprises the following steps of: a, clearing a mould and removing oil of the mould; b, assembling the mould; c, detecting precision of the mould; d, mounting a steel reinforcement framework and embedded parts; e, pouring and vibrating concrete, wherein vibrating time is controlled to be 4-10 minutes; f, molding and plastering concrete; g, carrying out steam curing on the duct pieces, resting for 3-4 hours and starting heating and steam-curing after vibrating is ended, wherein the duct piece steam-curing comprises four stages of a still resting stage T, a heating stage S, a constant-temperature stage H and a cooling stage J; h, de-molding the duct pieces; i, numbering and marking the duct pieces, and checking appearance to repair; j, carrying out water curing on the duct pieces; and k, storing the duct pieces. According to the production process disclosed by the invention, factory construction time can be saved, the whole construction period is effectively shortened, and factory construction cost is reduced; a fixed mould is on a designated position, and therefore, designated duct pieces with errors are favorably managed, and problem causes can be quickly determined; tunnel shield reinforced concrete duct pieces with high quality can be produced; and construction operation is normalized, programmed and standardized.

Description

technical field [0001] The invention relates to the field of shield segments, in particular to the production of prefabricated reinforced concrete segments in horseshoe-shaped shield construction. Background technique [0002] Shield method construction is a world-advanced underground tunnel construction technology. Using shield method for tunnel excavation has the advantages of fast construction speed, high lining quality, and small environmental impact. The prefabricated silicon segment used as a supporting structure requires With high strength, high precision, high quality, high impermeability and high appearance quality, it plays a vital role in the long-term stability and safe operation of the tunnel. The production of prefabricated segments of shield tunnels, its technology is developed with the development of tunnel construction technology, especially the development of shield tunnel construction technology. The construction technology of shield method includes earth...

AI Technical Summary

Problems solved by technology

The construction technology of shield method includes earth pressure balance type, mud-water balance type and mixed type shield, and the cross-sectional forms include circular, elliptical, rectangular, compound circular, horseshoe, etc., and the types of segments are also developed accordingly. At present, double circular The construction technology of shield tunneling and the production level of double-circle high-precision precast concrete segments have reached the international leading level, but the production level of concrete segments for horseshoe-shaped tunnels has not yet matured in China

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