Construction method for realizing fiber continuity at joints of concrete structure through molds

Abstract

The invention discloses a construction method for realizing fiber continuity at joints of a concrete structure through molds. The concrete joints are connected through fibers in a bridging mode, mechanical properties of the joints do not need to be improved through complex joint modes such as changing of the shapes of the joints and density increasing of reinforcing bars or special-shaped steel plates, and thus the problem of fiber incontinuity at the joints of the concrete structure is solved fundamentally; by manufacturing the fine-hole molds, the work that fibers are inserted into connecting plates is easy to realize, construction is quick, position inserting of the fibers is precise, the spacing of fine holes is manufactured according to the designed fiber spacing, the molds can be reused, and the construction cost is greatly saved; different types of fibers can be considered to be inserted into the manufactured molds, and the manufactured molds are suitable for various concrete structure joints; and in addition, the method is fast in construction, the project cost can be reduced, and good promotion 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 the joints of concrete structures by using molds. Background technique [0002] Concrete with fibers (such as ordinary fiber reinforced concrete, ultra-high performance concrete, etc.) is widely used in the field of civil engineering due to its excellent mechanical properties. The fibers in the concrete matrix can block the development of concrete cracks, so that its tensile, flexural and shear strengths are improved, and its impact resistance, fatigue resistance, post-cracking toughness and durability are also greatly improved. However, the current technical difficulty is that it is difficult to avoid the existence of joints (including construction joints, boundary joints, etc.) whether it is a prefabricated structure or a staged pouring structure, which also involves the problem of interface connectio...

AI Technical Summary

Problems solved by technology

Flat seams are widely used due to their simple construction, but their crack resistance is insufficient and easy to be damaged; zigzag seams and stepped seams increase the contact area of ​​the seam interface on the basis of flat seams, thereby increasing the joint strength. The crack strength at the joint is improved, but the enhancement effect is not obvious enough and the construction formwork is complicated; the groove-and-groove joint not only increases the contact area of ​​the joint, but also partially transforms the tensile stress on the joint through the interlocking effect of the tongue-and-groove structure For the shear stress, the crack strength of the joint is further improved, but it also increases the difficulty of construction, and the quality of the joint is difficult to guarantee

[0004] Although the above-mentioned joint construction measures can partially improve the joint strength, they cannot fundamentally solve the problem of the reduction of the joint crack resistance caused by the artificial "cutting" of the fibers at the joint, and have not exerted the advantages of the structure and the material itself. Advantage

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