Device and construction method for negative moment steel bar suspension construction control protective layer

Abstract

The invention relates to a hogging moment rebar suspension construction control protection layer device and a construction method thereof. The device comprises tripod supporting bases, a horizontal fixing beam and a fixation binding line. The method includes the following steps that firstly, the thickness of a cast-in-place concrete plate is determined; secondly, the position and the use number of tripod supporting bases are determined and the tripod supporting bases are manufactured in batches; thirdly, the tripod supporting bases are placed in the middle of adjacent hogging moment rebar; fourthly, the horizontal fixing beam is arranged on the tripod supporting bases in an erected mode; fifthly, the hogging moment rebar is suspended on the horizontal fixing beam through the fixing binding line to be bound and fixed; sixthly, the surface of concrete on the lower portion of the horizontal fixing beam after casting is floated; seventhly, after concrete reaches the design strength, the upper portion horizontal fixing beam is detached. Compared with the prior art, the hogging moment rebar suspension construction control protection layer device and the construction method of the hogging moment rebar suspension construction control protection layer device have the advantages that the structure is simple and light, the device is convenient to use and low in investment cost and the situation that the position of the stressed rebar in a concrete structure is accurate and the thickness of the hogging moment rebar protection layer conforms to the requirements is effectively ensured.

Description

technical field [0001] The invention relates to the technical field of reinforced concrete structure construction in construction engineering, in particular to a device and a construction method for negative moment reinforcement suspension construction control protection layer. Background technique [0002] In the construction of industrial and civil buildings, whether the position of the stressed steel bars in the concrete structure is accurate or not, and whether the thickness of the protective layer of the plate negative moment steel bar meets the requirements directly affects the bearing capacity and durability of the structure. The thickness of the concrete protective layer does not meet the design standards and construction quality requirements, and the possible hazards mainly include: (1) reducing the design bearing capacity of the structure and reducing the safety reserve of the structure; (2) causing premature corrosion of steel bars, resulting in structural strength...

AI Technical Summary

Problems solved by technology

[0004] The commonly used method of controlling the protective layer in construction projects in my country is to make concrete pads before construction, and bind the pads to the bottom of the negative moment steel bars during construction to ensure the thickness of the protective layer. This method has many disadvantages. During the production process, a 28-day maintenance period is required; second, the strength of the block is low, and the stepping of professional workers during construction after installation is likely to cause the block to break; third, the block and the negative moment steel mesh cannot form a whole , the position of a large number of negative moment steel bars will be shifted during pouring, resulting in uneven spacing of steel bars, resulting in uneven stress on the slab

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