A design method for prefabricated concrete grandstand slab with three fold lines and two steps

Abstract

The invention discloses a design method for a three-fold line double-step prefabricated concrete viewing platform. The span direction is three connected folding line segments, and the width direction includes two steps, step 1 and step 2, which are poured integrally from top to bottom. The middle part of the viewing platform is Pedestrian steps include concave steps on the upper part and convex steps on the lower part. The two ends of the viewing platform in the span direction are supported on the stepped cast-in-place inclined beams. The viewing platform panels on both sides of the stepped cast-in-place inclined beams are spliced ​​and leveled. The cast-in-place inclined beams and the adjacent upper and lower stands in the width direction are connected and fixed by pin bolts and grout anchors. All the stands are spliced ​​into a semicircular fan-shaped stand. The design methods include block design, three-fold line design, step design, connection node design, Structural design, detail structure design, embedded parts design. The invention has a high effect of simulating the arc shape of the stand, flexibly realizes the combination of the sunken step stand board components, has fast installation speed of the stand board, high construction efficiency, and has few seams between the stand boards, and the overall appearance is good.

Description

technical field [0001] The invention relates to the technical field of spectator slabs, in particular to a design method for a three-fold line double-step prefabricated concrete spectator slab. Background technique [0002] Generally, sports venues with large scale and high construction quality mostly use prefabricated concrete stand technology. Compared with cast-in-place, prefabrication has the advantages of saving formwork investment, reducing the amount of wet work on site, fast construction progress, beautiful appearance, and good durability of components. It has the advantages of good social and environmental benefits, and can eliminate the risk of complex stress cracking of super-long structures. As my country vigorously promotes prefabricated buildings, the concept of green construction is gradually deepened, and international and domestic sports events are becoming more and more popular, the application prospects of prefabricated concrete sports stand technology wil...

AI Technical Summary

Problems solved by technology

The degree of arc simulation of straight-line stands is relatively low, and the production of curved stand panels is difficult and costly. Single-step prefabricated stands have no obvious advantages in construction period in projects with tight construction schedules and large volumes.

In addition, in the current domestic prefabricated stand projects, prefabricated step boards are installed separately on the stand boards. This way of patchwork is not beautiful, and it is not suitable for concave step stands.

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