Concrete arc rib construction method

Abstract

The invention relates to the technical field of bridge construction, in particular to a concrete arch rib construction method. Divide the arch rib to be constructed into multiple sections arranged at intervals, build formwork on the bridge deck, pour the sections in sequence based on the formwork and reserve separation grooves between adjacent sections, and after all the sections are poured, the Concrete is filled in the separation groove to connect all the segments as a whole to form arch ribs. The present invention minimizes the stress generated during the pouring construction of the arch ribs through segmental construction, avoids the deformation of the arch ribs caused by stress release, ensures the requirements of the arch rib line shape, and at the same time, the arch ribs are reasonably segmented The construction efficiency is improved, the construction period is saved, and the difficult problem that the arch foot concrete is easy to crack is solved.

Description

technical field [0001] The invention relates to the technical field of bridge construction, in particular to a concrete arch rib construction method. Background technique [0002] In concrete tied arch bridges, the arch ribs are the main stress-bearing positions of the bridge type. The conventional closing method is: the reinforced concrete arch ribs are poured in-situ from the arch foot to the vault top until the top of the arch ribs are closed. The speed requirement is high, and the closing of the arch ribs must be completed before the initial setting of the first poured concrete. The control of the concrete pouring process is difficult, the lateral stability is poor, the risk is high, and it takes a long time; The continuous accumulation of stress at the root can easily cause cracking of the arch foot; at the same time, local stress is generated due to factors such as uneven settlement of the support and shrinkage and creep of the arch foot concrete, which affects the qua...

AI Technical Summary

Problems solved by technology

[0002] In concrete tied arch bridges, the arch ribs are the main stress-bearing positions of the bridge type. The conventional closing method is: the reinforced concrete arch ribs are poured in-situ from the arch foot to the vault top until the top of the arch ribs are closed. The speed requirement is high, and the closing of the arch ribs must be completed before the initial setting of the first poured concrete. The control of the concrete pouring process is difficult, the lateral stability is poor, the risk is high, and it takes a long time; The continuous accumulation of stress at the root can easily lead to cracking of the arch foot; at the same time, local stress is generated due to factors such as uneven settlement of the support and shrinkage and creep of the arch foot concrete, which affects the quality of the concrete

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