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Construction technique for rebuilding prestressing force system after built prestressing force system destroyed in reinforced concrete structure

A construction technology and prestressing technology, which is applied in the processing of building materials, construction, building maintenance, etc., can solve problems that affect engineering excellence, increase self-weight load, and affect the appearance of the surface, so as not to affect the appearance quality and increase The effect of shortening the load and construction period

Inactive Publication Date: 2007-10-31
浙江省二建建设集团有限公司
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

However, after the above-mentioned technologies are remedied and strengthened, the original structural section will be changed, the self-weight load will be increased, the appearance of the surface will be affected, and even the function of use will be affected, which will ultimately affect the excellence of the project.

Method used

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  • Construction technique for rebuilding prestressing force system after built prestressing force system destroyed in reinforced concrete structure
  • Construction technique for rebuilding prestressing force system after built prestressing force system destroyed in reinforced concrete structure

Examples

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Embodiment Construction

[0018] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0019] In Fig. 2, 1 is a frame beam, 2 is a column head, 3 is a steel bar, 4 is a new steel strand, 5 is a chain block, and 6 is an operating platform.

[0020] Referring to Figure 1, The 5 anchors 7 were cut off by wrong construction, of which the upper 3 are tension end anchors (clip type), and the lower 2 are fixed end anchors (P-type extrusion anchors). Because the design is that the tension end and fixed end anchorages in the same beam are arranged in a staggered manner, and one end is tensioned and anchored separately. "○" is a normal anchor 8.

[0021] Referring to Fig. 1 and Fig. 2, the partially damaged original prestressed steel strand anchors 7 are all removed. The new prestressed steel strand 4 with the same specification and strength as the original prestressed steel strand is stripped of the surface plastic sheath. Prepare a steel bar 3 who...

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Abstract

The invention discloses a construction art for rebuilding a broken inherent stress system after breaking a built inherent stress system in a reinforcement concrete structure, comprising the steps as removing a former broken inherent stress cable via an anchorage, stripping a surface plastic hood of a new inherent stress cable with same size and intensity of the former broken inherent stress cable, preparing a reinforcement with smaller diameter to the diameter of the former broken inherent stress cable, wherein the length of the reinforcement should be more then the cable of 50cm, and pulling out the former broken inherent stress cable, inserting the reinforcement into a former structure pore path, welding one end of the new inherent stress cable with one end of the reinforcement, connecting another end of the reinforcement with a chain block and pulling the reinforcement, inserting the new inherent stress cable into a hole via the reinforcement in the hole, extending the new inherent stress cable to meet a former design stress of a single cable and then anchoring.

Description

technical field [0001] The present invention relates to the construction technique of construction engineering, specifically a method for rebuilding the prestressed steel strand anchor in the original structure after the partial unbonded prestressed steel strand anchorage of the prestressed system in the reinforced concrete frame structure in the construction engineering is destroyed. The construction technique of the stress system. Background technique [0002] At present, unbonded prestressed reinforced concrete is widely used in engineering structures. The usual construction process of prestressed frame beams is that the carpenter installs the bottom formwork, and then the steel bar worker binds the girder steel bars, and then the prestressing professionals place the prestressed steel strands in the girder body according to the design requirements, and finally the carpenter closes the side of the beam Concrete shall be poured after acceptance and acceptance, and the unbo...

Claims

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Application Information

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IPC IPC(8): E04G23/02E04G21/12
Inventor 吴利民张卫星周东波陈春雷张幸祥
Owner 浙江省二建建设集团有限公司
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