Reinforced concrete cast-in-place slab hogging-moment rebar protection structure

Abstract

The invention provides a reinforced concrete cast-in-place slab hogging-moment rebar protection structure. The structure comprises a framework. Sagging-moment rebars and hogging-moment rebars are arranged in the framework. The sagging-moment rebars and the hogging-moment rebars are located on the upper side and the lower side of the framework respectively and are distributed in a staggered manner.Protectors are arranged on the framework. Each protector comprises a galvanized steel pipe, a handle and a notch groove, wherein the handle is arranged on the top of the galvanized steel pipe, the notch groove is formed in the middle segment of the galvanized steel pipe, and the notch groove is located beside the corresponding hogging-moment rebar. The hogging-moment rebars are protected with theprotectors. According to the reinforced concrete cast-in-place slab hogging-moment rebar protection structure, because the hogging-moment rebars can be firmly locked by the notch grooves and do not move with vibration, the project quality is improved, seven days after initial set of concrete, an infrared detector is used to carry out detection, a deviation qualification rate of a hogging-moment rebar protective layer reaches 90% or more, and the using effect is quite good; construction is convenient to carry out, and operation is easy to carry out; and because the protection structure is returnable in using, the project cost is reduced, and the protection structure is worthy of promotion and application.

Description

technical field [0001] The invention relates to the field of building construction, in particular to a negative moment reinforcement protection structure for reinforced concrete cast-in-place slabs. Background technique [0002] Article 5.5.2 of the national industry standard "Construction Quality Acceptance Code for Concrete Structure Engineering" (GB50204-2002) stipulates that "the allowable deviation of the thickness of the protective layer of the stressed steel bar of the slab is ± 3mm". The stressed steel bars in the slab are divided into two types: positive bending The moment steel bars and negative moment steel bars, the positive moment steel bars are located under the slab, and the concrete pads are used to place them during construction, which is easy to do. The negative moment reinforcement is located above the slab, which is difficult to achieve during construction. The traditional method in construction is to use heightened concrete pads, plastic positioning part...

AI Technical Summary

Problems solved by technology

The service life of the plate is shortened, and quality defects are left. Therefore, it is really difficult to say that the allowable deviation of the thickness of the protective layer of the negative bending moment steel bar is ±3mm.

Images