Thickness construction method and thickness control device for cast-in-place reinforced concrete pouring protective layer

Abstract

The invention relates to the technical field of building construction, and particularly relates to a thickness construction method and a thickness control device for a cast-in-place reinforced concrete pouring protective layer. Under the action of a supporting groove, a steel bar plate surface is controlled at a proper thickness position, so that the thickness of the cast-in-place reinforced concrete pouring protective layer is effectively controlled; in a concrete pouring process, steel bars can be prevented from sliding or rolling on the thickness control device, so that stability of a steel bar laying position in the pouring process is improved, and stress uniformity is improved; meanwhile, a filling hole and a slurry leaking hole are formed, so that concrete slurry can enter the thickness control device to form, and therefore, the defect that the integral strength of concrete at the position of the thickness control device is relatively low as a cavity is formed in the position of the thickness control device or a joint of concrete and an interface is fragile as a manufacturing material is plastic and the like is avoided; and the strength of a poured concrete plate surface is improved.

Description

technical field [0001] The invention relates to the technical field of building construction, in particular to a construction method and a device for controlling the thickness of a cast-in-place reinforced concrete pouring protective layer. Background technique [0002] In existing building and bridge projects, when controlling the thickness of the protective layer of reinforced concrete structures or prestressed concrete structures, pads are often used to bind steel bars to control the thickness of the protective layer and protect the steel bars from corrosion. At present, the blocks used to control the thickness of the protective layer are mainly concrete and waste marble, but in the actual use process, the expected technical effect is often not achieved. The main problems are: ① The strength of the concrete block is not up to the standard, and it is easy to break during construction. And the point contact surface between the concrete pad and the steel bar is about 0.5cm, ...

AI Technical Summary

Problems solved by technology

However, there are still the following technical problems: ①The plastic surface is hydrophobic, and the cementitious material does not infiltrate each other, which makes the interface between the concrete and the plastic surface weak and affects the strength of the reinforced concrete structure; When pouring concrete, construction workers walk frequently and have nowhere to stay, so it is inevitable that they will be stepped on a lot. Especially in the process of vibrating and compacting cast-in-place reinforced concrete, the relative positions of steel bars and thickness control devices are often correct. When pouring, the situation changes, which makes the steel bar bend and deform, and it is difficult to guarantee the thickness of the protective layer; ③The local cracks in the reinforced concrete cast-in-place are mostly on the upper part of the slab, cracking longitudinally along the protective layer of the steel bar, and the water penetrates into the steel bar and the welded joint along the cracks. On the U-shaped support frame, the welded U-shaped support frame extends to the bottom of the slab, so a diversion bridge is formed between the upper and lower reinforced concrete slabs, causing rust spots and affecting the overall endurance of the cast-in-place reinforced concrete; ④Reinforced slab If the surface is directly placed on the top of the cross bar skeleton, it is very easy to cause the pad to slide or move, which affects the accuracy of the construction, and it is difficult to control the thickness of the protective layer when pouring reinforced concrete columns.

[0004] Due to the existence of the above technical problems, the stress on the steel bars in the cast-in-place reinforced concrete is unbalanced, resulting in the limit of the bearing capacity and poor durability

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