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Stand variable-section prestress overhanging type folding beam construction method

A construction method and prestressing technology, applied in the direction of construction, building structure, and building material processing, to achieve the effect of improving the use function, reducing the self-weight of the structure, reducing the vertical shear force and the main tensile stress

Inactive Publication Date: 2012-07-25
天津住宅集团建设工程总承包有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The patent floor, beams, columns and other concrete structures are combined and poured at the same time, which is not suitable for the construction of variable-section prestressed cantilevered beams for stands of stadiums, theaters, etc.

Method used

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  • Stand variable-section prestress overhanging type folding beam construction method
  • Stand variable-section prestress overhanging type folding beam construction method
  • Stand variable-section prestress overhanging type folding beam construction method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) On the pre-thrown column reinforcement of the lower floor slab 6, the column reinforcements of a plurality of columns 4, 4-1, 4-2 are bound at intervals to form the left and right rows of column reinforcements, of which the first on the most side of the stand side The pillar reinforcement of pillar 4-1 is located at the transitional section of the formwork of the polybeam 1 to be installed; (2) the pillar formwork is supported at each pillar reinforcement, and then concrete is poured into the left and right rows of multiple pillar forms Left and right rows of pillars; (3) On the top of the left and right rows of pillars 4, 4-1, 4-2, the bottom formwork of the left polybeam and the bottom formwork of the right polybeam are respectively supported; (4) In the place The bottom formwork of the left and right folded beams 1 are respectively installed with ordinary steel bars and corrugated pipes 5 with pre-stressed steel bars. The pre-stressed steel bars are pre-stressed st...

Embodiment 2

[0033] (1) On the pre-thrown column reinforcement of the lower floor slab 6, the column reinforcements of a plurality of columns 4, 4-1, 4-2 are bound at intervals to form the left and right rows of column reinforcements, of which the first on the most side of the stand side The pillar reinforcement of pillar 4-1 is located at the transitional section of the formwork of the polybeam 1 to be installed; (2) the pillar formwork is supported at each pillar reinforcement, and then concrete is poured into the left and right rows of multiple pillar forms Left and right rows of pillars; (3) On the top of the left and right rows of pillars 4, 4-1, 4-2, the bottom formwork of the left polybeam and the bottom formwork of the right polybeam are respectively supported; (4) In the place The bottom formwork of the left and right folded beams 1 are respectively installed with ordinary steel bars and corrugated pipes 5 with pre-stressed steel bars. The pre-stressed steel bars are pre-stressed st...

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Abstract

The invention discloses a stand variable-section prestress overhanging type folding beam construction method, which comprises the following steps of: binding strut steel bars for a plurality of struts on a pre-throwing columnar bar of a lower floor slab at intervals to form left and right rows of strut steel bars; pouring concrete into a plurality of strut templates in a left row and a right row to form a left row of struts and a right row of struts; respectively supporting a bottom template of a left folding beam and a bottom template of a right folding beam on the tops of the struts; respectively mounting a common steel bar and a corrugated pipe penetrated by a prestress steel bar on the left folding beam bottom template and the right folding beam bottom template; integrally pouring concrete into the templates of the folding beams, beam templates of a plurality of beams, a template of a stand and a template of an upper floor slab; and after the strength of the concrete at the left folding beam and the right folding beam which are required to be poured meets a requirement, tensioning the prestress steel bar penetrated in the corrugated pipe. According to the method, steel materials are saved, the structural span is increased, the gravity of the structure is reduced, the usability is improved, and the vertical shearing force and the main tension stress of a concrete beam are reduced.

Description

Technical field [0001] The invention relates to a construction method of a prestressed beam, in particular to a construction method of a prestressed cantilevered folding beam with a variable cross-section of a stand. Background technique [0002] Prestressed concrete structural members are generally formed by stretching the prestressed tendons to form a resilient extrusion, so that the cross section of the concrete is subjected to a certain amount and evenly distributed internal pressure before being put into use, which is used to partially or completely offset the use of load. The resulting stress. It can improve the crack and deformation performance of structural members, and the tensile stress and the compressive stress in the concrete form a self-balancing system, which makes the concrete structure more reasonable. However, the pre-stressed construction process is relatively complicated, which requires strong professionalism in the construction of pre-stressed structures. [...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E04G21/00
Inventor 冯云李呈蔚王辉刁晓翔郭军
Owner 天津住宅集团建设工程总承包有限公司