CN103993750B - A kind of reinforcement means of engineering hollow unit - Google Patents

A kind of reinforcement means of engineering hollow unit Download PDF

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Publication number
CN103993750B
CN103993750B CN201410207477.7A CN201410207477A CN103993750B CN 103993750 B CN103993750 B CN 103993750B CN 201410207477 A CN201410207477 A CN 201410207477A CN 103993750 B CN103993750 B CN 103993750B
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China
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air bag
hollow unit
bag inner
inner model
layer
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CN201410207477.7A
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CN103993750A (en
Inventor
崔润超
马年祖
王中平
高瞻
平瑞锋
王世英
丁建涛
何保辉
于营
王鵾鹏
郭昊菲
张兴建
许强
吕肖林
刘皓楠
盛羽
乔建伟
王春雷
王统宁
侯志峰
韩志勇
贾克锐
韩广锴
唐国斌
刘志科
贺冬冬
魏志新
白涛
罗伦英
李玉磊
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Henan Zhixin Transportation Technology Co ltd
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HENAN PROVINCE REINFORCEMENT OF TRAFFIC ENGINEERING Co Ltd
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Abstract

The invention belongs to a kind of reinforcement means of engineering hollow unit, comprise the following steps: 1. according to the cross sectional shape of hollow unit, make Air bag inner model; 2. at the top drilling of hollow unit, Air bag inner model is placed in hollow unit inside; 3. being inflated to gas pressure in Air bag inner model to Air bag inner model is 3 ~ 6MPa; 4. to the moistening hollow unit inwall of hollow unit inwall sprayed mortar interfacial agents, the hole formed by top drilling builds self-leveling concrete in the space formed between hollow unit and Air bag inner model, curing concrete; 5. repair hole, complete reinforcing; The present invention only need be placed in component inside at original structure openings in the ceiling, then inflates use, easy construction, and compared with traditional reinforcement means, consolidation effect is better, saves reinforcement cost simultaneously; Concrete adopts placement layer by layer, can prevent Air bag inner model from becoming large because of pressure distortion; By adjustment end mode cross section and size, the reinforcing needs of dissimilar structure can be met.

Description

A kind of reinforcement means of engineering hollow unit
Technical field
The invention belongs to Reinforcement of Engineering Structure technical field, be specifically related to a kind of reinforcement means of engineering hollow unit.
Background technology
Common structure in engineering, as assembly hollow slab bridges, small box girder bridge etc., through operation for many years, there is more disease in this class formation, wherein most typical disease is crack; Traditional reinforcement means is included in external surface of structural member side affixing steel plate, carbon cloth etc., or at external surface of structural member concreting member section; These reinforcement means construction condition difficulties, construction quality is difficult to ensure usually, and after reinforcing, structure durability is poor.
Summary of the invention
The object of this invention is to provide that a kind of cost is lower, the reinforcement means of the engineering hollow unit of being convenient to strengthening construction.
For achieving the above object, the technological means that the present invention adopts is that a kind of reinforcement means of engineering hollow unit, comprises the following steps: 1. according to the cross sectional shape of hollow unit, makes Air bag inner model; 2. at the top drilling of hollow unit, Air bag inner model is placed in hollow unit inside; 3. being inflated to gas pressure in Air bag inner model to Air bag inner model is 3 ~ 6MPa; 4. to the moistening hollow unit inwall of hollow unit inwall sprayed mortar interfacial agents, the hole formed by top drilling builds self-leveling concrete in the space formed between hollow unit and Air bag inner model, curing concrete; 5. repair hole, complete reinforcing.
Preferably, described step 4. in build in the space formed between hollow unit and Air bag inner model self-leveling concrete adopt placement layer by layer, the thickness of building of first floor is 10 ~ 15cm, and it is 25 ~ 35cm that the second layer builds thickness, and third layer is poured into the bottom of hole.
Described Air bag inner model comprises interior side form, and the two ends of interior side form are respectively equipped with end mould, and interior side form forms dumbbell shape hollow structure jointly with end mould, and internal membrane is provided with valve.
End mould and interior side form adopt sewing or barbola work to be connected, and after Air bag inner model inflation, depended on pressure gas bears the pressure of rear pouring concrete.
Described end mould cross section is circular, rectangle or trapezoidal, is determined by strenthening member interior shape, and end mould cross dimension is consistent with strenthening member inside dimension, fits closely after inflation with former component inwall.
Described interior side form cross section is rectangle or circle, and area of section is determined by strengthening member design, and end mould and interior side form area of section difference are for reinforce the sectional area increased.
Described Air bag inner model can be made by materials such as rubber, plastics or cloth.
The beneficial effect that the present invention produces is, only need be placed in component inside at original structure openings in the ceiling, then inflate use, easy construction, and compared with traditional reinforcement means, consolidation effect is better, saves reinforcement cost simultaneously; Concrete adopts placement layer by layer, can prevent Air bag inner model from becoming large because of pressure distortion; By adjustment end mode cross section and size, the reinforcing needs of dissimilar structure can be met.
Accompanying drawing explanation
Fig. 1 is Air bag inner model elevational schematic view described in embodiment 1;
Fig. 2 is the B-B sectional schematic diagram of Air bag inner model described in embodiment 1;
Fig. 3 is the C-C sectional schematic diagram of Air bag inner model described in embodiment 1;
Fig. 4 is the hollowcore slab elevational schematic view after the reinforcing in embodiment 1;
Fig. 5 is the hollowcore slab A-A sectional schematic diagram after the reinforcing in embodiment 1.
Detailed description of the invention
Below in conjunction with specific embodiment, the invention will be further described; but realization of the present invention is not by the restriction of following manner; as long as have employed the various improvement that method of the present invention is conceived and technical scheme is carried out; or design of the present invention and technical scheme directly applied to other occasions, all should in protection scope of the present invention.
Embodiment 1
Reinforce to improve shear-carrying capacity to prefabricated concrete hollow slab, concrete implementation step is done as follows: 1. make reinforcing Air bag inner model, Air bag inner model as Figure 1-3, comprise interior side form 1, the two ends of interior side form 1 are respectively equipped with end mould 4, the outer shape of interior side form 1 is cuboid, and end mould 4 is cuboid, and interior side form 1 is communicated with end mould 4; Interior side form 1 forms dumbbell shape hollow structure jointly with end mould 4, internal membrane 1 is provided with valve 2; Air bag inner model length 3.0m, two ends sectional dimension is wide 1.25m × high 0.997m, and intermediate cross-section is of a size of wide 0.8m × high 0.6m; 2. form hole 3 at the top drilling of prefabricated concrete hollow slab 2, bore hole size is 20cm × 50cm, Air bag inner model is placed in prefabricated concrete hollow slab 2 inner; 3. being inflated to Air bag inner model air pressure to Air bag inner model is 4MPa; 4. to the moistening hollow unit inwall of hollow unit inwall sprayed mortar interfacial agents, build self-leveling concrete by hole in the space formed between hollow unit and Air bag inner model, and carry out maintenance, form layer of concrete 5; Concrete adopts placement layer by layer, and the thickness of building of first floor is 12cm, and it is 30cm that the second layer builds thickness, and third layer is poured into the bottom of hole 3; 5. repair hole 3, complete reinforcing.
The structure of the prefabricated concrete hollow slab after described reinforcing as illustrated in figures 4-5.
Embodiment 2
Embodiment 2 is with the difference of embodiment 1: 3. step is inflated to Air bag inner model air pressure to Air bag inner model is 6MPa; Step 4. in concrete adopt the thickness of placement layer by layer to be respectively, first floor build that thickness is 15cm, the second layer builds the bottom that thickness is 35cm, third layer is poured into hole 3.
Embodiment 3
Embodiment 3 is with the difference of embodiment 1: 3. step is inflated to Air bag inner model air pressure to Air bag inner model is 5MPa; Step 4. in concrete adopt the thickness of placement layer by layer to be respectively, first floor build that thickness is 10cm, the second layer builds the bottom that thickness is 25cm, third layer is poured into hole 3.

Claims (2)

1. a reinforcement means for engineering hollow unit, is characterized in that, comprises the following steps: 1. according to the cross sectional shape of hollow unit, makes Air bag inner model; Described Air bag inner model comprises interior side form, and the two ends of interior side form are respectively equipped with end mould, and interior side form forms dumbbell shape hollow structure jointly with end mould, and internal membrane is provided with valve; End mould and interior side form adopt sewing or barbola work to be connected; 2. at the top drilling of hollow unit, Air bag inner model is placed in hollow unit inside; 3. being inflated to gas pressure in Air bag inner model to Air bag inner model is 3 ~ 6MPa; 4. to the moistening hollow unit inwall of hollow unit inwall sprayed mortar interfacial agents, the hole formed by top drilling builds self-leveling concrete in the space formed between hollow unit and Air bag inner model, curing concrete; 5. repair hole, complete reinforcing.
2. the reinforcement means of engineering hollow unit as claimed in claim 1, it is characterized in that: step 4. in build in the space formed between hollow unit and Air bag inner model self-leveling concrete adopt placement layer by layer, the thickness of building of first floor is 10 ~ 15cm, it is 25 ~ 35cm that the second layer builds thickness, and third layer is poured into the bottom of hole.
CN201410207477.7A 2014-05-16 2014-05-16 A kind of reinforcement means of engineering hollow unit Active CN103993750B (en)

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Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104988851A (en) * 2015-05-14 2015-10-21 中铁四局集团第一工程有限公司 Prestressed hollow slab beam end air bag reinforcing construction method
CN105625201B (en) * 2015-12-31 2018-02-02 长安大学 A kind of method that culvert is reinforced using inflatable inner mould and self-compacting concrete
CN106079046A (en) * 2016-06-03 2016-11-09 合肥超威光电科技有限公司 A kind of flue shaped device and the flue forming method of application flue shaped device
CN106836018B (en) * 2016-12-27 2018-11-23 中冶建筑研究总院有限公司 The bottom surface longitudinal cracking reinforcement means of precast hollow slab bridge
CN107447610A (en) * 2017-06-11 2017-12-08 中铁二院工程集团有限责任公司 A kind of high-speed railway transition segment structure and construction method

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KR20090108305A (en) * 2008-04-11 2009-10-15 주식회사 아이비엘이앤씨 Construction method of hollow slab bridge
CN102392420A (en) * 2011-10-31 2012-03-28 刘其伟 Vertical crack grouting and reinforcing method of prestressed concrete hollow slab bridge bottom plate

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Publication number Priority date Publication date Assignee Title
KR20090108305A (en) * 2008-04-11 2009-10-15 주식회사 아이비엘이앤씨 Construction method of hollow slab bridge
CN102392420A (en) * 2011-10-31 2012-03-28 刘其伟 Vertical crack grouting and reinforcing method of prestressed concrete hollow slab bridge bottom plate

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Address after: 450000 North 310 National Road, Yongan Road Street, Gongyi City, Zhengzhou City, Henan Province

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