CN103195260A - Reinforcing structure capable of ensuring new and old concrete structures to be stressed together and reinforcing construction method thereof - Google Patents
Reinforcing structure capable of ensuring new and old concrete structures to be stressed together and reinforcing construction method thereof Download PDFInfo
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- CN103195260A CN103195260A CN2013101113591A CN201310111359A CN103195260A CN 103195260 A CN103195260 A CN 103195260A CN 2013101113591 A CN2013101113591 A CN 2013101113591A CN 201310111359 A CN201310111359 A CN 201310111359A CN 103195260 A CN103195260 A CN 103195260A
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Abstract
The invention discloses a reinforcing structure capable of ensuring new and old concrete structures to be stressed together. The reinforcing structure comprises a plurality of connection members, an adhesion agent, newly-added reinforcing steel bars and new concrete, wherein the connection members are longitudinally arranged along the old concrete structure at intervals, the adhesion agent is coated on the surface of the old concrete structure between adjacent I-shaped steel members after the surface of the old concrete structure is roughened, the newly-added reinforcing steel bars are longitudinally arranged along the I-shaped steel members, the new concrete is formed by pouring concrete on the surface of the old concrete structure, and the surface of the new concrete is parallel and level to the surfaces of the joist steel members. The invention also discloses a reinforcing construction method with the above reinforcing structure. According to the reinforcing structure and the reinforcing construction method, the plurality of connection members are arranged on the contact surfaces of the new concrete structure and the old concrete structure, and the anti-slip capability in the horizontal and the vertical directions and the separation resistance in the longitudinal direction of the contact surfaces of the new concrete structure and the old concrete structure can be improved, so that the new concrete structure and the old concrete structure can be stressed together and perfectly connected to achieve coordinate deformation, and the bearing capability and the long-term using performance of the reinforcing structure are guaranteed.
Description
Technical field
The present invention relates to a kind of reinforcing maintenance technique that guarantees the novel connecting key that the New-old concrete structure is common stressed.
Background technology
In structural fortification, often need build the as placed concrete material at the old concrete body structure surface of damage, with increasing section height and bending resistance moment of inertia, improve structural-load-carrying capacity and extending structure application life;
Vertical antiskid migration of New-old concrete carries out toward the mode that adopts bonding surface cutter hair and brushing interfacial agents at present; This mode is realized that with the concrete snap-in force mode of vertical coordination distortion often is difficult to reach common stressed effect, in use for some time, is occurred the phenomenon of vertically throwing off on the bonding surface of more ruggedized construction.
At present in stabilization works, for guaranteeing new construction not reason gravity and old structure disengagement, the general form of U-shaped hoop that adopts connects, the situation that U-shaped hoop can displacement take place even come off in long-term use, and outward appearance is not too attractive in appearance, influence normal result of use, stabilization works newly adds concrete structure and the situation vertically peeling off even come off can occur in use for some time.
In sum, common stressed often being difficult to of reinforcing the back New-old concrete guarantees, especially the slippage cracking of the old and new's structure interface under load action, can occur and vertically peel off problem, therefore need to adopt certain measure to stop this interface sliding and peel off, present technological means often can not guarantee this stressed jointly.
Summary of the invention
The objective of the invention is to remedy the deficiency of existing concrete Reinforcement Technology, solve reinforcing back New-old concrete structure and be difficult to realize a common stressed difficult problem.
The present invention has adopted following technical scheme to reach the foregoing invention purpose:
A kind of common stressed ruggedized construction of New-old concrete structure that guarantees, it is characterized in that: described ruggedized construction comprises
Some connecting keys along the setting of old concrete member longitudinal separation, described connecting key comprises an i-steel component and some crab-bolts, the bottom width of described i-steel component equates with old concrete member width, the height of i-steel component equates with plan pouring as placed concrete thickness, the upper and lower bottom surface of i-steel component is reserved with the corresponding perforation that arranges, described anchor post one end is implanted old concrete, the perforation that the other end penetrates i-steel component is exposed to the old concrete component surface, and the old concrete component surface is close in a wherein bottom surface of i-steel component;
Described ruggedized construction also comprises the interfacial agents that brush the old concrete component surface cutter hair back between the adjacent i-steel component; And comprise along what i-steel component was vertically laid and newly add reinforcing bar; And comprising the as placed concrete that is shaped from the pouring of old concrete surface, described as placed concrete surface is concordant with the i-steel component surface.
Described connecting key is arranged one every 2～3m.
Described crab-bolt is chemical anchor bolts, and its implantation depth is 20～30 times of crab-bolt diameter.
The longitudinal length of described i-steel component is 30cm, 6 chemical anchor bolts of every i-steel component configuration.
Described i-steel component adopts the Q235 steel, and its external surface is brushed with anticorrosion and fireproof paint.
The job practices of the ruggedized construction that a kind of as above arbitrary described assurance New-old concrete structure is common stressed, it may further comprise the steps:
1) crab-bolt is implanted in the old concrete member, described crab-bolt is exposed to the old concrete component surface;
2) in the old concrete component surface i-steel component is installed, the bottom width of described i-steel component equates with the old concrete width, the height of i-steel component equates with plan pouring as placed concrete thickness, the upper and lower bottom surface of i-steel component is reserved with the corresponding perforation that arranges, make the crab-bolt in the step 1) run through described perforation, and the tentatively fixing nut of crab-bolt;
3) with the surface of the old concrete between adjacent i-steel component cutter hair, and the brushing interfacial agents;
4) newly add reinforcing bar, supporting template in the zone installation of plan pouring as placed concrete;
5) build and newly add concrete, after maintenance and the form removal moulding, it is fastening that the nut of bolt is implemented secondary.
The nut of chemical anchor bolts should be fastening at twice, for the first time behind the i iron location, for the second time after newly watering shaping structures.
Described chemical anchor bolts, each connecting key respectively have 6, to guarantee shearing resistance and the resistance to tension of connecting key.
The invention provides a kind of common stressed structure structure of New-old concrete structure that realizes, it adopts the connecting key of being made up of implanted chemical anchor bolts and i-steel component, the present invention is by arranging some novel connecting keys at the New-old concrete structure interface, can play and improve that the vertical antiskid of the old and new's contact surface level moves and the ability of vertical antistripping, thereby guaranteed the stressed jointly of the old and new's structures, New-old concrete is connected preferably and realize compatible deformation, guaranteed supporting capacity and the long-term functional performance of ruggedized construction.The novel connecting key that arranges is more firm than U-shaped hoop and cross section cutter hair ways of connecting, and has the unexistent vertical antiskid of U-shaped hoop and move effect, being connected effect and will getting well much than cross section cutter hair and brushing interfacial agents.Adopt that novel connecting key has that stress performance is good, prefabrication, advantage such as easy for installation, be adapted at occasions such as structural strengthening maintenance and applied.
Description of drawings
Fig. 1 a is the plan view of single connecting key.
Fig. 1 b is the Li Tutu of single connecting key.
Fig. 1 c is the sectional drawing of single connecting key.
Fig. 2 a is for adopting the structure elevation after connecting key is reinforced.
Fig. 2 b is the 1-1 sectional drawing of Fig. 2 a.
Fig. 3 is connecting key work progress sectional schematic diagram of the present invention, and wherein Fig. 3 a is the old concrete beam; Fig. 3 b is for implanting chemical anchor bolts in old concrete; Fig. 3 c is for installing i-steel component additional; Fig. 3 d is for adding reinforcing bar and template being installed; Fig. 3 e is the structural representation behind the as placed concrete castable.
Fig. 4 is structure installation process elevational schematic view of the present invention, and wherein Fig. 4 a is with old concrete surface cutter hair; Fig. 4 b builds as placed concrete and is shaped for newly adding reinforcing bar, supporting template.
Wherein, connecting key 1 chemical bolt 1.1 i iron 1.2 newly add reinforcing bar 1.3 templates 2 old concretes 3 interfaces 3.1 as placed concretes 4
The specific embodiment
Below be example with the beam type member as reinforced structure, the present invention is further described.
Carry out constructing operation according to the following steps:
1) according to newly adding concrete structure size and old concrete structure length, the some i-steel components of welding that are prefabricated in the factory, described i-steel component adopts the steel plate that is not less than 10mm to make.The width of i-steel component two bottom surfaces should be identical with the width of old concrete beam, and the height of i-steel component equates that with plan pouring as placed concrete thickness the upper and lower bottom surface of i-steel component is reserved with the perforation of some groups of upper and lower correspondences.
2) at old concrete structure assigned address chemical anchor bolts 1.1 are installed, are implanted length and be not less than 20 times of the crab-bolt diameter, and stretch out the length of old structure should be than the long 2cm of the thickness of newly placed concrete;
3) some i iron 1.2 are installed in the installation site of chemical anchor bolts 1.1, are screwed nut for the first time;
4) cutter hair old concrete interface 3.1, the brushing interfacial agents;
5) supporting template and colligation newly add reinforcing bar 1.3;
6) build and newly add concrete 4, and the maintenance moulding;
7) form removal and fastening nut for the second time.
Chemical anchor bolts and i-steel component are answered prefabrication, and both might not be standard specifications, should make in advance, and i iron can adopt weld type, crab-bolt length to design in advance.The longitudinal length of the i-steel component that adopts among the present invention is 30cm, and 6 chemical anchor bolts of configuration form a connecting key on each i iron.Connecting key arranges one for 2～3 meters along vertical every interval of beam.
The construction means of newly placed concrete adopts existing job practices to get final product according to actual conditions, is not inventive point of the present invention, does not repeat them here.
Except the beam type member, being suitable for of the present invention can also be pillar member etc., as long as member section is square.
Claims (6)
1. one kind guarantees the common stressed ruggedized construction of New-old concrete structure, and it is characterized in that: described ruggedized construction comprises
Some connecting keys along the setting of old concrete member longitudinal separation, described connecting key comprises an i-steel component and some crab-bolts, the bottom width of described i-steel component equates with old concrete member width, the height of i-steel component equates with plan pouring as placed concrete thickness, the upper and lower bottom surface of i-steel component is reserved with the corresponding perforation that arranges, described anchor post one end is implanted old concrete, the perforation that the other end penetrates i-steel component is exposed to the old concrete component surface, and the old concrete component surface is close in a wherein bottom surface of i-steel component;
Described ruggedized construction also comprises the interfacial agents that brush the old concrete component surface cutter hair back between the adjacent i-steel component; And comprise along what i-steel component was vertically laid and newly add reinforcing bar; And comprising the as placed concrete that is shaped from the pouring of old concrete surface, described as placed concrete surface is concordant with the i-steel component surface.
2. the common stressed ruggedized construction of assurance New-old concrete structure according to claim 1, it is characterized in that: described connecting key is arranged one every 2～3m.
3. the common stressed ruggedized construction of assurance New-old concrete structure according to claim 1 is characterized in that described crab-bolt is chemical anchor bolts, and its implantation depth is 20～30 times of crab-bolt diameter.
4. the common stressed ruggedized construction of assurance New-old concrete structure according to claim 1, it is characterized in that: the longitudinal length of described i-steel component is 30cm, 6 chemical anchor bolts of every i-steel component configuration.
5. the common stressed ruggedized construction of assurance New-old concrete structure according to claim 1, it is characterized in that: described i-steel component adopts the Q235 steel, and its external surface is brushed with anticorrosion and fireproof paint.
6. job practices as the common stressed ruggedized construction of the arbitrary described assurance New-old concrete structure of claim 1～5 is characterized in that may further comprise the steps:
1) crab-bolt is implanted in the old concrete member, described crab-bolt is exposed to the old concrete component surface;
2) in the old concrete component surface i-steel component is installed, the bottom width of described i-steel component equates with the old concrete width, the height of i-steel component equates with plan pouring as placed concrete thickness, the upper and lower bottom surface of i-steel component is reserved with the corresponding perforation that arranges, make the crab-bolt in the step 1) run through described perforation, and the tentatively fixing nut of crab-bolt;
3) with the surface of the old concrete between adjacent i-steel component cutter hair, and the brushing interfacial agents;
4) newly add reinforcing bar, supporting template in the zone installation of plan pouring as placed concrete;
5) build and newly add concrete, after maintenance and the form removal moulding, it is fastening that the nut of bolt is implemented secondary.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310111359.1A CN103195260B (en) | 2013-04-01 | 2013-04-01 | A kind ofly ensure the ruggedized construction that New And Old Concrete Structures is jointly stressed and construction method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310111359.1A CN103195260B (en) | 2013-04-01 | 2013-04-01 | A kind ofly ensure the ruggedized construction that New And Old Concrete Structures is jointly stressed and construction method thereof |
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| CN103195260A true CN103195260A (en) | 2013-07-10 |
| CN103195260B CN103195260B (en) | 2015-11-25 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104179120A (en) * | 2014-07-10 | 2014-12-03 | 燕山大学 | Treatment method for bonding surface of fresh and old concrete |
| CN105714693A (en) * | 2016-02-03 | 2016-06-29 | 蓝海建设集团有限公司 | Plate girder bridge strengthening method |
| CN105863147A (en) * | 2016-04-01 | 2016-08-17 | 济南大学 | Nano-modified high-durability concrete material and preparation method thereof |
| CN109518985A (en) * | 2018-10-10 | 2019-03-26 | 广东省建筑设计研究院 | A kind of design and construction method improving the power transmission of new-old concrete interface |
| CN112854814A (en) * | 2021-01-11 | 2021-05-28 | 周金红 | House construction is with fixing a point demolish wall body device |
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| CN1301905A (en) * | 1999-12-24 | 2001-07-04 | 武汉巨成加固实业有限公司 | Strengthening method with viscous steel to enlarge section |
| JP2008025220A (en) * | 2006-07-21 | 2008-02-07 | Hazama Corp | Concrete construction reinforcing structure |
| CN201254785Y (en) * | 2008-09-09 | 2009-06-10 | 武汉武大巨成加固实业有限公司 | Concrete beam plate component reinforced by employing profiled bar beam enlarged section |
| CN201722945U (en) * | 2010-01-11 | 2011-01-26 | 贵阳铝镁设计研究院 | Reinforcing structure of building surface beam plate |
| CN203188645U (en) * | 2013-04-01 | 2013-09-11 | 中交四航工程研究院有限公司 | Reinforcing structure ensuring common stress of old concrete structure and new concrete structure |
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2013
- 2013-04-01 CN CN201310111359.1A patent/CN103195260B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1301905A (en) * | 1999-12-24 | 2001-07-04 | 武汉巨成加固实业有限公司 | Strengthening method with viscous steel to enlarge section |
| JP2008025220A (en) * | 2006-07-21 | 2008-02-07 | Hazama Corp | Concrete construction reinforcing structure |
| CN201254785Y (en) * | 2008-09-09 | 2009-06-10 | 武汉武大巨成加固实业有限公司 | Concrete beam plate component reinforced by employing profiled bar beam enlarged section |
| CN201722945U (en) * | 2010-01-11 | 2011-01-26 | 贵阳铝镁设计研究院 | Reinforcing structure of building surface beam plate |
| CN203188645U (en) * | 2013-04-01 | 2013-09-11 | 中交四航工程研究院有限公司 | Reinforcing structure ensuring common stress of old concrete structure and new concrete structure |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104179120A (en) * | 2014-07-10 | 2014-12-03 | 燕山大学 | Treatment method for bonding surface of fresh and old concrete |
| CN104179120B (en) * | 2014-07-10 | 2016-01-06 | 燕山大学 | A kind of new-old concrete bonding processing method |
| CN105714693A (en) * | 2016-02-03 | 2016-06-29 | 蓝海建设集团有限公司 | Plate girder bridge strengthening method |
| CN105863147A (en) * | 2016-04-01 | 2016-08-17 | 济南大学 | Nano-modified high-durability concrete material and preparation method thereof |
| CN105863147B (en) * | 2016-04-01 | 2018-07-27 | 济南大学 | A kind of nano modification high durability concrete material and preparation method thereof |
| CN109518985A (en) * | 2018-10-10 | 2019-03-26 | 广东省建筑设计研究院 | A kind of design and construction method improving the power transmission of new-old concrete interface |
| CN112854814A (en) * | 2021-01-11 | 2021-05-28 | 周金红 | House construction is with fixing a point demolish wall body device |
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| Publication number | Publication date |
|---|---|
| CN103195260B (en) | 2015-11-25 |
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