Construction method achieving fiber continuity at joint in process of pouring concrete for certain times

Abstract

The invention discloses a construction method achieving fiber continuity at a joint in the process of pouring concrete for a certain times. The construction method comprises the steps that fibers are made to partly penetrate into a connecting plate (such as foam plastic) in the length direction; then formworks are mounted at a preset concrete joint interface, and the sides, without exposing of the fibers, of the connecting plate is closely attached to the inner sides of the formworks; the formworks and the connecting plate of the joint interface are dismantled after one time of concrete pouring and curing to enable the fibers penetrating into the connecting plates to expose at the joint interface; and the formworks are mounted again, and next-time concrete pouring and curing are conducted, so that the fibers are connected in the adjacent concrete of different batches. According to the construction method, the problem of the fibers, in the joint, of the fiber concrete are discontinuous is solved from the source, joint performance is improved without the need of complex joint modes such as changing of the joint shape and arranging of shear keys or irregular steel plates, construction is convenient, structure performance is excellent, the engineering construction cost can be reduced significantly, and good popularization prospects are achieved.

Description

Technical field [0001] The invention belongs to the technical field of civil engineering, and in particular relates to a construction method for realizing fiber continuity at joints during concrete pouring in stages. Background technique [0002] In order to improve the crack resistance of concrete structures, fibers are often added to concrete to form fiber concrete structures. These dispersed fibers can effectively prevent the expansion of micro-cracks and the formation of macro-cracks in the concrete, significantly improve the bending, tensile, corrosion and fatigue resistance of the concrete structure, and make the structure have better ductility. Concrete structures are divided into precast and cast-in-place construction methods. The precast structures are generally connected by cast-in-place belts (cast-in-situ sections). If the cast-in-situ structure cannot be completed at one time, construction joints need to be set. The situation will involve the connection of the old a...

AI Technical Summary

Problems solved by technology

[0004] The structure of the above joints does not fundamentally solve the problem of fiber discontinuity at the interface between old and new concrete. Instead, some measures are used to make up for this part of the loss, and the advantages of the structure and the potential of the material cannot be fully utilized.

Especially for ultra-high-performance concrete constructed according to the principle of maximum compactness, the joints greatly reduce the overall performance of the structure

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