Bottom die and core mould integrated slidable stencil and construction process

Abstract

The invention provides a bottom mold and core mold integrated sliding template and a construction process. The process is suitable for manufacturing an n-shaped section pretensioning prestressed concrete beam and can be broaden and applied to the manufacture of the pretensioning prestressed concrete beam with a downward open mold cavity. The bottom mold and core mold integrated sliding template comprises a ground crossbeam connected and fixed with a pedestal foundation, a slippage limiting and locking mechanism which is arranged on the ground crossbeam and consists of a slippage contact block, a limit block and a positioning pin, a bottom mold rack arranged on the slippage limiting and locking mechanism, and a bottom mold and a core mold of a beam body section which are connected with thebottom mold rack into a whole; a bottom mold of a supporting seat part is placed on the bottom mold rack by an adjusting cushion block; and the bottom mold can be independently adjusted so as to meetrequirement of a curve beam with different angles. The bottom mold rack, the integrated bottom mold and core mold and the bottom mold of the supporting seat positioned on the bottom mold rack can longitudinally and integrally slide along a beam body through the slippage limiting and locking mechanism when the pretensioning prestress is stretched and can be reset after the beam is hoisted.

Description

technical field [0001] The invention relates to the construction field of concrete prefabricated components, in particular to a construction formwork and a construction process suitable for pretensioned prestressed concrete beams with a downward opening cavity. Background technique [0002] Traditional elevated vierendeel beams are generally box-shaped, generally closed in cross-section, and only temporary openings are set at beam ends or beam tops according to construction needs. The prestressed form is generally pre-tensioned, post-tensioned or a combination of the two. Post-tensioned prestressed beams can be cast-in-place or prefabricated, and all beams with pre-tensioned methods must have fixed pedestals, so they are generally factory prefabricated. . [0003] For box girders with pretensioned prestress, the formwork system is generally divided into bottom formwork, inner core formwork, side formwork and end formwork, which are independent of each other. During the ove...

AI Technical Summary

Problems solved by technology

[0004] For beams with downwardly open cavities, typically, for example figure 1 The pre-tensioned prestressed concrete beam with “∏” cross-section opening downwards and diaphragm ribs shown is generally not used in traditional construction, and there is a lack of ready-made construction technology

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