Construction method for long-span cast-in-situ unbonded prestressed hollow floor slabs

A technology of hollow floor slab and construction method, which is applied to floors, building components, buildings, etc., can solve the problems of poor thermal insulation effect, self-heavy weight, and no energy saving, so as to ensure safety and durability, ensure thermal insulation performance, and enhance slab strength. Effect

Inactive Publication Date: 2013-07-31
CHINA CONSTR SEVENTH ENG DIVISION CORP LTD
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Problems solved by technology

On the one hand, the existing cast-in-place slab structure has a large self-weight, which cannot realize the large-span and large-bay structural system. The existing large-span and large-bay structural system is basically realized by steel structure, but because the thermal insulation effect of the steel structure is worse than that of the concrete structure, it cannot energy saving

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  • Construction method for long-span cast-in-situ unbonded prestressed hollow floor slabs

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Embodiment Construction

[0026] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0027] In summary, the present invention discloses a construction method for a large-span cast-in-place unbonded prestressed hollow slab, comprising the following steps (such as figure 1 shown):

[0028] The first step: install the floor bottom formwork, install the bottom formwork according to the design requirements, and use double-sided adhesive tape to bond the joints of the bottom formwork;

[0029] Step 2: Determine the installation position of the rib beam and LPM lightweight pipe, and draw the LPM installation position and the edge line of the rib beam on the surface of the bottom form according to the design requirements;

[0030] Step 3: Binding the rib beam reinforcement and the bottom reinforcement of the floor slab; including placing plastic protective layer pads on the bottom formwork, then placing the distribution rein...

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Abstract

The invention discloses a construction method for long-span cast-in-situ unbonded prestressed hollow floor slabs. The method comprises the following steps: step 1, installing a floor slab soffit formwork; step 2, determining the installation position of ribbed beams and LPM light tubes, and drawing the installation position of the LPM light tubes and the side lines of the ribbed beams on the surface of the soffit formwork according to the design requirement; step 3, binding ribbed beam reinforcement bars and floor slab bottom reinforcement bars; step 4, installing positioning bars; step 5, laying prestressed reinforcement bars; step 6, laying hydropower pipelines; step 7, laying the LPM light tubes; step 8, erecting an end formwork; step 9, binding floor slab panel reinforcement bars; step 10, pouring and maintaining concrete; and step 11, tensioning the prestressed reinforcement bars. The construction method has the advantages that as the LPM light tubes are additionally arranged in the middle part of the floor slabs, on the one hand, the dead load of the floor slabs is reduced, and the construction of long-span building structures is realized; on the other hand, the thermal insulation properties of buildings are ensured; and the prestressed method is adopted in the floor slab construction process, the strength of the floor slabs is enhanced, and the safety and the durability of the floor slabs are ensured.

Description

technical field [0001] The invention relates to the technical field of a construction method for a building floor, in particular to a construction method for a large-span cast-in-place unbonded prestressed hollow floor. Background technique [0002] In order to meet the increasing demand of human beings for the comprehensive use of buildings, with the urbanization of the capital, the increase of high-rise buildings and super-high buildings, the requirements for large-span and large-bay structural systems are also increasing, not only requiring safety, durability Sex, but also to meet the applicability of the society. On the one hand, the existing cast-in-place slab structure has a large self-weight, which cannot realize the large-span and large-bay structural system. The existing large-span and large-bay structural system is basically realized by steel structure, but because the thermal insulation effect of the steel structure is worse than that of the concrete structure, it...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E04G21/00E04B5/16
Inventor 熊启东朱小玲蒋志新黄兴红孙忠国
Owner CHINA CONSTR SEVENTH ENG DIVISION CORP LTD
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