Method for controlling concrete compactness at T-shaped beam deformation section of reinforced concrete prestress

Abstract

The present invention discloses a method for controlling concrete compactness at a T-shaped beam deformation section of reinforced concrete prestress, which comprises the following steps: horizontally and evenly distributing a plurality of plate vibrators on a template corresponding to a T-shaped beam horseshoe section, horizontally and evenly distributing a plurality of overflows on a template corresponding to the lower bar zone of a T-shaped beam deformation section, and arranging an overflow between the adjacent two plate vibrators; injecting the concrete into the lower bar zone of the T-shaped beam deformation section, and observing whether the concrete flows out of the overflows, if not, continuing concrete vibrating until the concrete flows out of the overflows; closing the overflows if the concrete flows out of the overflows; and injecting the concrete into the lower bar zone of the T-shaped beam deformation section, starting the plate vibrators, carrying out concrete vibrating with a vibrating tamper, and judging concrete-vibrating compactness in accordance with the situation whether the concrete flows out of the overflows, if not, proving that the concrete is uncompacted, thus needing to continue concrete-vibrating, and if yes, proving that the concrete is compacted. The method is more scientific and more accurate, and completely eradicates occurrence of cavities in the lower bar zone of the T-shaped beam deformation section, thereby greatly improving pouring quality of the T-shaped beam.

Description

technical field [0001] The invention relates to a method for controlling the compactness of concrete, in particular to a method for controlling the compactness of concrete in the deformation section of a reinforced concrete prestressed T-shaped beam. Background technique [0002] People in the industry who are engaged in the professional construction of roads and bridges know that one of the difficulties of prefabricated reinforced concrete prestressed T-beams is how to control the concrete compactness after concrete pouring. Taking a beam as an example, the concrete is not dense. The key areas mainly occur on the junction line between the horseshoe of the T-beam and the rib plate. [0003] In the prior art, the cross section of the T-beam is as figure 1 As shown, the cross-section of the T-beam consists of the horseshoe section 1a of the T-beam, the lower rib area 2a of the T-beam deformation section, the T-beam rib plate 3a, the upper rib area 4a of the T-beam deforma...

AI Technical Summary

Problems solved by technology

A row of plate vibrators are evenly distributed horizontally on the formwork corresponding to the horseshoe section 1a of the T-beam. When pouring concrete, the material is cut from one direction from the horseshoe section 1a of the T-beam, and the plate vibrator is turned on for compactness and rod-free vibration. , because the concrete section is thick, it is easy to vibrate and compact the concrete. After this process is completed, the concrete pouring and cutting in the lower rib area 2a of the T-shaped beam deformation section will start. Since the lower rib area 2a of the T-shaped beam deformation section is located in the T-shaped beam rib plate In the junction area with the T-beam horseshoe section 1a, the thickness gradually becomes thinner, the steel bars are dense, and a large number of corrugated pipes meet, which makes it difficult to unload the concrete. The horseshoe section absorbs most of the vibration force. At this time, it is entirely up to the operator of the vibrator to control the vibrating compactness of the 2a concrete in the lower rib area of ​​the T-shaped beam deformation section by using the vibrating rod operator. If human negligence occurs, it is very easy to cause the deformation of the T-shaped beam. The 2a concrete in the lower reinforcement area of ​​the section is not dense, and it is easy to form cavities, and even cause the T-beam to be scrapped

Therefore, this empirical method is not easy to control the vibrating compactness of concrete, and it is extremely unscientific.

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