Construction method of unbonded prestressed large-diameter reinforced concrete thin-wall circular pool

Abstract

The invention discloses a construction method of an unbonded prestressed large-diameter reinforced concrete thin-wall circular pool. The construction method sequentially comprises the following steps that surveying and setting out are conducted on a construction site according to the design requirements of the pool; earth excavation is conducted according to surveying and setting out; a foundation cushion layer of the pool is constructed; pool bottom plate steel bars are bound, and formworks are erected; pool bottom plate concrete is poured; the formworks are erected on the pool wall, and steel bars of the pool wall are bound; unbonded prestressed steel bars of the pool wall are laid and bound; pool wall concrete is poured and maintained; the unbonded prestressed steel bars of the pool wall are tensioned in a prestressed mode; the anchoring ends of the unbonded prestressed steel bars of the pool wall are blocked; waterproof sealing treatment is conducted on a cup opening of a bottom plate of the pool; and a full water test is conducted on the pool. According to the construction method, during construction of the circular pool, the wall thickness of the pool can be effectively decreased on the premise that the circular pool meets the design and use functions, the construction cost of the pool is reduced, and meanwhile the construction difficulty is lowered.

Description

technical field [0001] The invention belongs to the technical field of concrete building construction, and in particular relates to a construction method for a non-bonded prestressed large-diameter reinforced concrete thin-walled circular pool. Background technique [0002] Large-scale sewage treatment plants generally need to be equipped with large biological pools, secondary sedimentation tanks, and primary sedimentation tanks, and the shape of the above-mentioned pools is preferably circular in cross section. Some pools need to be 60m in diameter and over 7m in height. When designing a circular pool structure in the traditional way, the vertical design generally adopts ordinary reinforced concrete to meet the force requirements, while in the horizontal design, often because the diameter is too large, the temperature difference between day and night and seasons will cause great changes. It is difficult for ordinary reinforced concrete to meet the requirements of strength a...

AI Technical Summary

Problems solved by technology

When designing a circular pool structure in the traditional way, the vertical design generally adopts ordinary reinforced concrete to meet the force requirements, while in the horizontal design, often because the diameter is too large, the temperature difference between day and night and seasons will cause great changes. hoop tensile stress, and ordinary reinforced concrete is difficult to meet the requirements of strength and crack resistance at the same time, in order to achieve these two indicators, it is necessary to increase the wall thickness, dense reinforcement

This will increase the construction cost of this type of large pool body, resulting in waste of resources, and also increases the difficulty of construction

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