CN107269018B - Concrete girder reinforced construction method with secondary beam - Google Patents
Concrete girder reinforced construction method with secondary beam Download PDFInfo
- Publication number
- CN107269018B CN107269018B CN201710540171.7A CN201710540171A CN107269018B CN 107269018 B CN107269018 B CN 107269018B CN 201710540171 A CN201710540171 A CN 201710540171A CN 107269018 B CN107269018 B CN 107269018B
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- Prior art keywords
- girder
- steel
- stirrup
- reinforced
- hole
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- 238000010276 construction Methods 0.000 title claims abstract description 19
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 50
- 239000010959 steel Substances 0.000 claims abstract description 50
- 230000002787 reinforcement Effects 0.000 claims abstract description 29
- 239000011449 brick Substances 0.000 claims abstract description 27
- 239000011241 protective layer Substances 0.000 claims abstract description 13
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims abstract description 8
- 239000004570 mortar (masonry) Substances 0.000 claims description 11
- 239000003822 epoxy resin Substances 0.000 claims description 10
- 229920000647 polyepoxide Polymers 0.000 claims description 10
- 238000003466 welding Methods 0.000 claims description 4
- 210000003205 muscle Anatomy 0.000 claims description 3
- 230000015271 coagulation Effects 0.000 claims description 2
- 238000005345 coagulation Methods 0.000 claims description 2
- 238000009434 installation Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
- E04G23/0218—Increasing or restoring the load-bearing capacity of building construction elements
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
- E04G23/0218—Increasing or restoring the load-bearing capacity of building construction elements
- E04G23/0244—Increasing or restoring the load-bearing capacity of building construction elements of beams at places of holes, e.g. drilled in them
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Rod-Shaped Construction Members (AREA)
- Reinforcement Elements For Buildings (AREA)
Abstract
The invention discloses a kind of concrete girder reinforced construction method with secondary beam, it is characterized in that construction procedure includes: (1) installation I-steel；(2) tensioner is installed；(3) it is drilled with brick wall preformed hole；(4) girder protective layer is cut；(5) prestressed reinforcing bar；(6) prestressed reinforcement of tensioning；(7) brick wall preformed hole is closed；(8) stirrup will be reinforced and girder stirrup welds；(9) Reinforced Hoop and girder main reinforcement are welded；(10) girder lower part is closed using expansive concrete, and expansive concrete intensity is C30.
Description
Technical field
The present invention relates to a kind of reinforced construction method, in particular to a kind of concrete girder strengthening construction side with secondary beam
Method.
Background technique
Bearing capacity, which once occurs, in concrete girder with secondary beam must not enough or in the case where crack be reinforced, for
Concrete girder ruggedized construction with secondary beam, traditional reinforcement means reinforcement method of enlarging section, reinforcement by sticking of sheets, viscous carbon fiber add
Gu the shortcomings that method, these reinforcement means, since ruggedized construction belongs to secondary loading structure, is reinforced preceding former there is Stress resort
Structure stress, stress, strain on section have existed, under stress condition, only when original structure stress reaches certain
In the case of ruggedized construction just participate in carrying, be easy to appear that original structure reaches capacity state and ruggedized construction carries lesser situation,
It is unobvious to the consolidation effect of the concrete girder with secondary beam in the conventional way.
Summary of the invention
The present invention is to provide a kind of concrete girder reinforced construction method with secondary beam, solves ruggedized construction and brick wall reason
Structure is unable to the problem of cooperative bearing.
Wall hole is dug out shelving secondary beam position in the present invention, and I-steel is protruded into wall hole, I-steel and wall hole gap position
Using concrete enclosing, wall secondary beam lower protective layer is cut, and exposes main reinforcement, and I-steel top mark height is identical as main reinforcement bottom absolute altitude,
Main reinforcement and I-steel are welded, tensioner is welded in I-steel bottom, and deformed bar is broken line type, and deformed bar is straight
Diameter is 18~22mm, and deformed bar protrudes into brick wall preformed hole, and it is 25~28mm, brick wall preformed hole hole that brick wall, which reserves bore dia,
Epoxy resin mortar is clogged at position, and epoxy resin mortar makes deformed bar and brick wall unify, and deformed bar tensioning is complete
Bi Houyong anchorage is fixed.Girder protective layer is cut, and exposes girder stirrup, will be reinforced stirrup and is made into U-shaped, the reinforcing stirrup opening that is open
Double limbs and girder stirrup weld, and reinforcing stirrup diameter is identical as girder stirrup diameter, and weld length is 10 times of stirrup diameters, will lead
Length carries out being reinforced using Reinforced Hoop in from secondary 1/3 span scope of beam end as span unit between beam and secondary beam,
Reinforced Hoop diameter is identical as girder stirrup diameter, and Reinforced Hoop uses closed stirrup, and Reinforced Hoop and girder main reinforcement are welded to connect, reinforce
Hoop spacing is 75~100mm, and girder lower part is closed using expansive concrete.
Tensioner includes billet, has a nut, without silk nut, screw rod, steel cushion block.Billet with a thickness of 10~
12mm, billet length and width are 100~150mm, and dial gauge is installed in billet side, move down data for measuring,
Machine drawing tool lower part is provided with a nut, has a nut to be welded and fixed with billet, has a nut inner ring to be equipped with screw thread, screw diameter
For 28~32mm, silk tooth is arranged in screw rod lower part, and the silk dental length of screw rod is than there is the screw thread length of a nut 20~25mm big, spiral shell
Bar silk tooth is connected with there is a nut screw thread, and on screw rod top, welding welds steel pad without silk nut, lower part steel cushion block lower surface
Block, steel cushion block are up-side down triangle wedge, steel cushion block bottommost to do it is in the arc-shaped, when being contacted so as to steel cushion block and deformed bar
It will not occur stress concentration.It is rotated with spanner without silk nut when operation, drives screw rod rotation, due to screw rod silk tooth and have a nut
The effect of screw thread will drive billet movement, and mobile range is reflected by being mounted on the dial gauge of billet side.
Construction procedure includes:
(1) I-steel is installed
Wall hole is dug out shelving secondary beam position, I-steel is protruded into wall hole, I-steel and wall hole gap position use coagulation
Grave closes, and is C30 for closed concrete strength, and wall secondary beam lower protective layer is cut, and exposes main reinforcement, by main reinforcement and I-shaped
Steel is welded；
(2) tensioner is installed
Weld tensioner in I-steel bottom；
(3) it is drilled with brick wall preformed hole
(4) girder protective layer is cut
(5) prestressed reinforcing bar
Deformed bar passes through brick wall preformed hole, is bent at the steel cushion block position of tensioner；
(6) prestressed reinforcement of tensioning
Since the stress loss of relaxation of steel, brick wall preformed hole hole position packing ring can be related in deformed bar tensioning
The stress loss of oxygen resin mortar, therefore prestress steel is rib prestressed is answered using control according to many experimental results using ultra stretching
Power ultra stretching 5%.It is fixed after deformed bar tensioning with anchorage.
(7) brick wall preformed hole is closed
Epoxy resin mortar is clogged at brick wall preformed hole hole position；
(8) stirrup will be reinforced and girder stirrup welds
(9) Reinforced Hoop and girder main reinforcement are welded
(10) girder lower part is closed using expansive concrete, and expansive concrete intensity is C30.
The present invention without silk nut, is made billet move down forced deformed bar in place, forced by rotation tensioner
Reinforcing bar extensional and obtain prestressing force.Reinforcing bar can generate upward reaction force to I-steel, secondary so as to directly lay down
The load of beam, therefore the mechanical property that the present invention reinforces is good.In addition, the used tensioner of the present invention can at the construction field (site) voluntarily
Production, easy to operate cost is relatively low.
Detailed description of the invention
Fig. 1 is the concrete girder ruggedized construction schematic diagram with secondary beam, and Fig. 2 is tensioner schematic diagram, and Fig. 3 is to reinforce hoop
Muscle and original stirrup connection schematic diagram.
In each attached drawing: 1, I-steel, 2, tensioner, 3, deformed bar, 4, expansive concrete, 5, anchorage, 6, epoxy
Resin mortar, 7, girder, 8, secondary beam, 9, billet, 10, have a nut, 11, without silk nut, 12, screw rod, 13, steel cushion block, 14,
Dial gauge, 15, girder stirrup, 16, reinforcing stirrup.
Specific embodiment
Fig. 1 is the concrete girder ruggedized construction schematic diagram with secondary beam, and Fig. 2 is tensioner schematic diagram, and Fig. 3 is to reinforce hoop
Muscle and original stirrup connection schematic diagram.
Wall hole is dug out shelving secondary beam position in embodiment, and I-steel 1 is protruded into wall hole, I-steel 1 and wall hole space part
Position uses concrete enclosing, and wall secondary beam lower protective layer is cut, and exposes main reinforcement, 1 top mark height of I-steel and main reinforcement bottom absolute altitude phase
Together, main reinforcement and I-steel 1 are welded, tensioner 2 is welded in 1 bottom of I-steel, and deformed bar 3 is broken line type, answers in advance
3 diameter of power reinforcing bar is 22mm, and deformed bar 3 protrudes into brick wall preformed hole, and it is 28mm, brick wall preformed hole hole that brick wall, which reserves bore dia,
Epoxy resin mortar 6 is clogged at gap position, and epoxy resin mortar 6 makes deformed bar 3 and brick wall unify, deformed bar 3
It is fixed with anchorage 5 after tensioning.7 protective layer of girder is cut, expose girder stirrup 15, by reinforce stirrup 16 be made into opening it is U-shaped,
It reinforces that stirrup 16 is open double limbs and girder stirrup 15 welds, reinforces that 16 diameter of stirrup is identical with 15 diameter of girder stirrup, and welding is grown
Degree is 10 times of stirrup diameters, using length between girder 7 and secondary beam as span unit, in from secondary 1/3 span scope of beam end
Reinforced using Reinforced Hoop, Reinforced Hoop diameter is identical as 15 diameter of girder stirrup, and Reinforced Hoop uses closed stirrup, reinforces
Hoop is welded to connect with girder main reinforcement, and Reinforced Hoop spacing is 75mm, and 7 lower part of girder is closed using expansive concrete 4.
Tensioner 2 includes billet 9, has a nut 10, has a nut 11, screw rod 12, steel cushion block 13.Billet 9 is thick
Degree is 12mm, and 9 length and width of billet is 120mm, and dial gauge 14 is installed in 9 side of billet, moves down data for measuring,
2 lower part of tensioner is provided with a nut 10, has a nut 10 to be welded and fixed with billet 9, has 10 inner ring of a nut to be equipped with silk
Button, 12 diameter of screw rod are 30mm, and silk tooth is arranged in 12 lower part of screw rod, and the silk dental length of screw rod 12 is than there is the screw thread length of a nut 10
Big 22mm is wanted, 12 teeth of screw rod are connected with there is 10 screw thread of a nut, are welded with a nut 11, lower part steel on 12 top of screw rod
Steel cushion block 13 is welded in 13 lower surface of cushion block, and steel cushion block 13 is up-side down triangle wedge, and 13 bottommost of steel cushion block will do in the arc-shaped.Behaviour
There is a nut 11 with spanner rotation when making, screw rod 12 is driven to rotate, due to 12 teeth of screw rod and plays the role of 10 screw thread of a nut
It is mobile to will drive billet 9, mobile range is reflected by being mounted on the dial gauge 14 of 9 side of billet.
Construction procedure includes:
(1) I-steel 1 is installed
Wall hole is dug out shelving secondary beam position, I-steel 1 is protruded into wall hole, I-steel 1 and wall hole gap position using mixed
Solidifying grave closes, and is C30 for closed concrete strength, and wall secondary beam lower protective layer is cut, and exposes main reinforcement, by main reinforcement and work
Word steel 1 is welded；
(2) tensioner 2 is installed
Weld tensioner 2 in 1 bottom of I-steel；
(3) it is drilled with brick wall preformed hole
(4) 7 protective layer of girder is cut
(5) prestressed reinforcing bar 3
Deformed bar 3 passes through brick wall preformed hole, is bent at 13 position of steel cushion block of tensioner 2；
(6) prestressed reinforcement of tensioning 3
Using proof stress ultra stretching 5%.It is fixed with anchorage 5 after 3 tensioning of deformed bar.
(7) brick wall preformed hole is closed
Epoxy resin mortar 6 is clogged at brick wall preformed hole hole position；
(8) stirrup 16 will be reinforced to weld with girder stirrup 15
(9) Reinforced Hoop and 7 main reinforcement of girder are welded
(10) 7 lower part of girder is closed using expansive concrete 4, and expansive concrete semi-finals degree is C30.
Claims (1)
1. a kind of concrete girder reinforced construction method with secondary beam, it is characterized in that wall hole is dug out shelving secondary beam position, by work
Word steel protrudes into wall hole, and I-steel and wall hole gap position use concrete enclosing, and wall secondary beam lower protective layer is cut, and exposes master
Muscle, I-steel top mark height is identical as main reinforcement bottom absolute altitude, and main reinforcement and I-steel are welded, and stretching machine is welded in I-steel bottom
Tool, deformed bar are broken line type, and deformed bar protrudes into brick wall preformed hole, and epoxy resin is clogged at brick wall preformed hole hole position
Mortar, epoxy resin mortar make deformed bar and brick wall unify, and are fixed after deformed bar tensioning with anchorage；It is main
Beam protective layer is cut, and exposes girder stirrup, will be reinforced stirrup and is made into be open U-shaped, the double limbs of reinforcing stirrup opening and the weldering of girder stirrup
Connect, using length between girder and secondary beam as span unit, carried out in from secondary 1/3 span scope of beam end using Reinforced Hoop into
Row is reinforced, and Reinforced Hoop diameter is identical as girder stirrup diameter, and Reinforced Hoop uses closed stirrup, and Reinforced Hoop and the welding of girder main reinforcement connect
It connects, girder lower part is closed using expansive concrete；
Construction procedure includes:
(1) I-steel is installed
Wall hole is dug out shelving secondary beam position, I-steel is protruded into wall hole, I-steel and wall hole gap position use coagulation grave
Close, be C30 for closed concrete strength, wall secondary beam lower protective layer cuts, expose main reinforcement, by main reinforcement and I-steel into
Row welding；
(2) tensioner is installed
Weld tensioner in I-steel bottom；
(3) it is drilled with brick wall preformed hole
(4) girder protective layer is cut
(5) prestressed reinforcing bar
Deformed bar passes through brick wall preformed hole, is bent at the steel cushion block position of tensioner；
(6) prestressed reinforcement of tensioning
Using proof stress ultra stretching 5%, fixed after deformed bar tensioning with anchorage；
(7) brick wall preformed hole is closed
Epoxy resin mortar is clogged at brick wall preformed hole hole position；
(8) stirrup will be reinforced and girder stirrup welds
(9) Reinforced Hoop and girder main reinforcement are welded
(10) girder lower part is closed using expansive concrete, and expansive concrete intensity is C30.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710540171.7A CN107269018B (en) | 2016-02-24 | 2016-02-24 | Concrete girder reinforced construction method with secondary beam |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610127847.5A CN105625743B (en) | 2016-02-24 | 2016-02-24 | Concrete girder ruggedized construction with secondary beam |
| CN201710540171.7A CN107269018B (en) | 2016-02-24 | 2016-02-24 | Concrete girder reinforced construction method with secondary beam |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610127847.5A Division CN105625743B (en) | 2016-02-24 | 2016-02-24 | Concrete girder ruggedized construction with secondary beam |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107269018A CN107269018A (en) | 2017-10-20 |
| CN107269018B true CN107269018B (en) | 2019-03-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710537646.7A Active CN107060368B (en) | 2016-02-24 | 2016-02-24 | Concrete girder ruggedized construction |
| CN201710540171.7A Active CN107269018B (en) | 2016-02-24 | 2016-02-24 | Concrete girder reinforced construction method with secondary beam |
| CN201610127847.5A Active CN105625743B (en) | 2016-02-24 | 2016-02-24 | Concrete girder ruggedized construction with secondary beam |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710537646.7A Active CN107060368B (en) | 2016-02-24 | 2016-02-24 | Concrete girder ruggedized construction |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610127847.5A Active CN105625743B (en) | 2016-02-24 | 2016-02-24 | Concrete girder ruggedized construction with secondary beam |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110836023A (en) * | 2017-09-12 | 2020-02-25 | 叶长青 | Reinforcing construction method of concrete beam |
| CN107605172B (en) * | 2017-10-16 | 2020-04-17 | 叶长青 | Construction method for reinforcing structure of concrete roof beam |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09273318A (en) * | 1996-04-04 | 1997-10-21 | Fujita Corp | Earthquakeproof reinforcing structure for beam-column joint in existing reinforced concrete or steel-concrete composite structure |
| FR2818676B1 (en) * | 2000-12-27 | 2003-03-07 | Freyssinet Int Stup | METHOD FOR DISASSEMBLING A PRE-STRESS CABLE AND DEVICE FOR IMPLEMENTING THE SAME |
| KR100560725B1 (en) * | 2005-10-17 | 2006-03-14 | 주식회사 세진에스씨엠 | Reinforcement structure for girder of architecture |
| CN101660327B (en) * | 2008-08-29 | 2011-07-20 | 万科企业股份有限公司 | Connecting structure of precast concrete secondary beam and main beam, construction method and building |
| CN201334780Y (en) * | 2008-12-09 | 2009-10-28 | 贵阳铝镁设计研究院 | Reinforced structure of reinforced concrete secondary beam |
| CN202202577U (en) * | 2011-08-18 | 2012-04-25 | 正益集团有限责任公司 | Post disassembly structure of pre-stressed support beam |
| CN103388408B (en) * | 2013-07-28 | 2016-01-13 | 桂林理工大学 | A kind of building structure external prestressing muscle reinforces steering block |
| CN204152236U (en) * | 2014-08-27 | 2015-02-11 | 唐昌辉 | A kind of external prestressing strengthening device |
| CN104929381A (en) * | 2015-06-02 | 2015-09-23 | 项剑锋 | Steel-support non-cohesive steel strand lower support type prestress floor reinforcing method |
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2016
- 2016-02-24 CN CN201710537646.7A patent/CN107060368B/en active Active
- 2016-02-24 CN CN201710540171.7A patent/CN107269018B/en active Active
- 2016-02-24 CN CN201610127847.5A patent/CN105625743B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN105625743A (en) | 2016-06-01 |
| CN107060368B (en) | 2019-06-07 |
| CN107269018A (en) | 2017-10-20 |
| CN107060368A (en) | 2017-08-18 |
| CN105625743B (en) | 2017-11-14 |
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Effective date of registration: 20201204 Address after: 224000 Dajian neighborhood committee, Haitong Town, Sheyang County, Yancheng City, Jiangsu Province Patentee after: Sheyang Tonghai Village Construction Development Co., Ltd Address before: Ouhai District of Zhejiang city in Wenzhou province 325000 Rong Road No. 39 Patentee before: Zhu Kui |