Pitched roof concrete construction method

Abstract

The invention discloses a pitched roof concrete construction method which is characterized in that a double-sided die sealing method is adopted to carry out construction on a pitched roof of which the slope is greater than or equal to 20 degrees; by bracing a bottom die and a top die of the pitched roof, concrete is poured to form a constraint under the slope condition; a short reinforcement is used as a bracket between the bottom die and the top die of the pitched roof; the short reinforcement has a diameter of 22 to 25 mm; the top die and the bottom die are connected into one whole body by split bolts; the split bolts have diameters of 14 to 16 mm; the split bolts are arranged at intervals of 250 to 300 mm; water stop rings are arranged in the middles of the split bolts; the water stop rings have diameters of 40 to 50 mm; reinforcement split heads are arranged on the upper surface of the bottom die for placing an upper negative reinforcement skeleton; sectional pouring and tamping are adopted in the pouring process of concrete, and a die plate at the upper part of the pitched roof is sealed step by step from bottom to top along the pouring progress of concrete.

Description

technical field [0001] The invention relates to a sloping roof, in particular to a concrete construction method for a sloping roof. Background technique [0002] The traditional method of sloping roof concrete construction is the single-sided sealing method. Its construction process is: after supporting the bottom formwork and binding steel bars, pouring dry hard concrete with a slump of 8 to 10mm and patting it on the formwork, and then sliding The falling concrete was scraped to the upper part. When the concrete is close to initial setting, use a portable small flat-panel vibrator to vibrate compactly and level it at the same time. [0003] In many engineering practices, although no holes are found in the slope roof concrete constructed by the single-sided sealing method after the formwork is removed, there are individual honeycomb phenomena. If these honeycomb pores are connected, it is likely to cause rainwater to leak, and it is difficult to find the leaking point, so...

AI Technical Summary

Problems solved by technology

However, when the formwork exceeds a certain angle and the concrete is subjected to vibration, since the frictional resistance of the formwork to the concrete is less than the sliding force of the concrete, the concrete will slide down the formwork

This phenomenon may last until the initial setting of the concrete, coupled with the segmental barrier effect of the steel mesh, will lead to honeycomb pores in the concrete, causing roof leakage, thus affecting the safety and durability of the entire structure

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