CN104929320A - Rebar connecting structure and construction method thereof - Google Patents
Rebar connecting structure and construction method thereof Download PDFInfo
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- CN104929320A CN104929320A CN201510351637.XA CN201510351637A CN104929320A CN 104929320 A CN104929320 A CN 104929320A CN 201510351637 A CN201510351637 A CN 201510351637A CN 104929320 A CN104929320 A CN 104929320A
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Abstract
The invention discloses a rebar connecting structure and a construction method thereof, relates to the technical field of building construction and aims to solve the problems of material waste and complexity in construction caused by the fact that a connecting section and overlapping length are reserved to meet anchoring length of a rebar connecting structure among existing beam plate components. The rebar connecting structure is positioned two prefabricated reinforced concrete components which are arranged at an interval, reserved rebars are arranged at ends of the prefabricated reinforced concrete components, the rebar connecting structure comprises a main body and the reserved rebars, the main body is formed by pouring a high-performance cement based composite material, and the reserved rebars which are in mutually-overlapped connection are coated in the main body. The construction method includes: reserving a post-pouring area between the prefabricated reinforced concrete components which are arranged at the interval; enabling the ends of the reserved rebars to be in mutually-overlapped connection in the post-pouring area and to be bound and fixed; pouring the high-performance cement based composite material in the post-pouring area, and demounting a formwork after reaching strength required by design to completing construction of the rebar connecting structure.
Description
Technical field
The present invention relates to technical field of building construction, particularly a kind of steel bar connecting structure based on high performance cement-based composites and construction method thereof.
Background technology
Current job site, continuous spreading is often needed as the reinforcing bar mainly bearing pulling force or pressure in agent structure, or connect into cage of reinforcement, conventional rebar connecting technology mainly contains colligation, electric welding, sleeve extruding mechanical connection, and grout sleeve connection etc.
Make a concrete analysis of as follows: reinforcing bar binding joint, when longitudinal tensile reinforcing bar adopts colligation lap joint, its minimum lap length should meet the requirement of " concrete structure engineering construction quality accident specification " by joint area percentage.But when steel bar stress diameter is greater than 10mm, reinforcing bar binding connects, and reinforcing bar waste is more; Reinforcing bar arc welding connects, and compares and relies on welder's level, and generally produces internal stress to reinforcing bar; Extrusion socket joint, the termination of two reinforcing bars waiting is inserted in steel bushing, radially steel bushing is extruded with machine for pressuring, it is made to produce plastic strain, the steel bushing after distortion is relied on closely to be engaged with reinforcing bar, reach connection effect, extrusion socket joint quality is guaranteed, but the cost height topmost shortcoming that is it; Grout sleeve connects, bar splice link technique conventional in fabricated construction, all regulation is had to sleeve, grouting material, bonding surface, sleeve topping and connecting length, although it is better to connect effect, but design and construction should be noted that item is more, and being difficult to construction at the closeer situation lower sleeve of reinforcing bar arrangement, technical costs is higher; When longitudinal reinforcement adopts slurry anchor overlap joint to connect, to preformed hole pore-forming technique, duct shape and length, detailing requiments, grouting material be connected reinforcing bar, should carry out the verification experimental verification of mechanical property and applicability, the reinforcing bar that diameter is greater than 20mm and the longitudinal reinforcement directly bearing dynamic loading component all should not adopt slurry anchor overlap joint to connect.
In sum, there is waste material in existing rebar connecting technology, engineering cost is high, or the scope of application has the defects such as limitation, therefore, how to design a kind of economy and be easy to operate steel bar connecting structure and construction method, be the technical problem that those skilled in the art need solution badly.
Summary of the invention
For the steel bar connecting structure between existing beams and slabs, reserved larger jointing and lap length is taked for meeting anchorage length, not only waste material, and the problem of complicated construction technique, a kind of steel bar connecting structure and construction method thereof are the object of this invention is to provide, high performance cement-based composites is built on the basis of bar splicing between two precast reinforced concrete structures, namely form firmly durable steel bar connecting structure after sclerosis, thus save material usage and simplify construction technology.
The present invention solves the steel bar connecting structure that its technical problem adopts, described steel bar connecting structure is between spaced two precast reinforced concrete structures, the end of two described precast reinforced concrete structures is equipped with reserved steel bar, described steel bar connecting structure comprises the main body of being built by high performance cement-based composites, and is coated on the reserved steel bar of the mutual overlap joint in described main body.
Preferably, the diameter of the lap length L1 of described reserved steel bar to be 3d ~ 5d, d be described reserved steel bar.
Preferably, described steel bar connecting structure also comprises some uniform connecting reinforcements, and described connecting reinforcement is vertical with described reserved steel bar to be arranged and is fixed on described reserved steel bar.
Preferably, the lap position of described reserved steel bar fixes at least one described connecting reinforcement.
Preferably, the length L2 of described steel bar connecting structure is 100mm ~ 200mm.
Preferably, the end of described precast reinforced concrete structure is also provided with concavo-convex alternate keyway.
In addition, present invention also offers the construction method of above-mentioned steel bar connecting structure, step is as follows:
One, after satisfied structure or force request, reserved after-pouring region between two spaced precast reinforced concrete structures;
Two, overlap joint colligation are fixed mutually in casting area in the rear to make the end of the reserved steel bar in two described precast reinforced concrete structures;
Three, build high performance cement-based composites in casting area in the rear, after the intensity that it reaches designing requirement, stripping, completes the construction of described steel bar connecting structure.
Preferably, in described step 2, the diameter of the lap length L1 of described reserved steel bar end to be 3d ~ 5d, d be embedded bar.
Preferably, described step 2 also comprises, and also arranges some described connecting reinforcements in described after-pouring region, and described connecting reinforcement is perpendicular to described reserved steel bar and be fixed on described reserved steel bar.
Effect of the present invention is:
One, steel bar connecting structure of the present invention, high performance cement-based composites is built on the basis of bar splicing between two precast reinforced concrete structures, namely firmly durable steel bar connecting structure is formed after sclerosis, because high performance cement-based composites has the high-strength characteristic of to be out of shape under tension and pressurized situation close to steel, the force request of bar connecting can be met, and meet stressed concertedness, and, it shows the carbonization resistance exceeding tens times than ordinary concrete between the load-bearing operating period, during thin sight makes it and reinforcing bar co-operation without the self-healing capability of pore substantially, durability is ensured, when the lap length of reserved steel bar is 3d ~ 5d, the drawing yield failure of reinforcing bar between high performance cement-based composites can be realized but not extract destruction, based on these advantages, significantly can save bar splicing length of an interval degree, simplify bar splice treatment process, and then it is cost-saving.
Two, the construction method of steel bar connecting structure of the present invention, after satisfied structure or force request, reserved after-pouring region between two precast rc slabs, the end of the reserved steel bar in two precast rc slabs is overlapped mutually in after-pouring region, and high performance cement-based composites is built in after-pouring region, itself and reserved steel bar is made to form firmly durable steel bar connecting structure, the high adhesion stress of high performance cement-based composites and itself characteristic that is high-strength, high-durability, make steel bar connecting structure place not easily recurring structure destruction; And the high fluidity of high performance cement-based composites and easy-to-handle seam properties, can stop syndeton position and percolating water phenomenon occurs; Significantly, above-mentioned construction method makes after-pouring zone length shorten, reserved steel bar can straightly be arranged, do not need to bend up, weld or set up the process such as sleeve, the overlap length of reserved steel bar is shortened greatly, and steel bar connecting structure width reduction is original more than 1/4th, significantly reduces amount of reinforcement, constructing operation is more simple, compares other link technique construction effect higher.
Accompanying drawing explanation
Fig. 1 be one embodiment of the invention steel bar connecting structure in reinforcing bar lay schematic diagram;
Fig. 2 is the top view of Fig. 1;
Fig. 3 is the schematic diagram of the steel bar connecting structure after having constructed in one embodiment of the invention.
Detailed description of the invention
A kind of steel bar connecting structure proposed the present invention below in conjunction with the drawings and specific embodiments and construction method thereof are described in further detail.According to explanation below and claims, advantages and features of the invention will be clearer.Below by cited embodiment by reference to the accompanying drawings, technology contents of the present invention and feature will be described in detail.Need to illustrate in addition, accompanying drawing all adopts the form that simplifies very much and all uses non-ratio accurately, only in order to object that is convenient, the aid illustration embodiment of the present invention lucidly.For sake of convenience, hereinafter described " on ", D score is consistent with the upper and lower direction of accompanying drawing, but this can not become the restriction of technical solution of the present invention.
Embodiment one: composition graphs 1 to Fig. 3 illustrates a kind of steel bar connecting structure of the present invention, the present embodiment is constructed for the bar connecting of two pieces of precast rc slabs, as shown in Figure 1, precast rc slab 1 and interval identical with precast rc slab 22 absolute altitude is arranged, precast rc slab 1 and the end of precast rc slab 22 are respectively equipped with reserved steel bar one 1a and reserved steel bar two 2a (reinforcing bar parallel with x-axis), the steel bar connecting structure of the present embodiment is between precast rc slab 1 and precast rc slab 22, it comprises the main body 5 of being built by high performance cement-based composites, and be coated on reserved steel bar one 1a and reserved steel bar two 2a of the mutual overlap joint in main body 5.Above-mentioned high performance cement-based composites take portland cement as matrix, with alkali-resistant glass fibre, general synthetic fibers, various ceramic fibre, carbon and the contour performance fibers of aramid fiber, wire and natural plant fibre and mineral fibers for reinforcement, add the composite material that filler, chemical assistant and water are formed through combination process, it is different from traditional high-strength concrete and steel fibrous concrete, but possesses the new types of Cernent based structures engineering material of superhigh intensity, superhigh tenacity (metalloid deformation performance), superelevation endurance quality and superelevation workability.
Steel bar connecting structure of the present invention, high performance cement-based composites is built on the basis of bar splicing between two precast reinforced concrete structures, namely firmly durable steel bar connecting structure is formed after sclerosis, because high performance cement-based composites has the high-strength characteristic of to be out of shape under tension and pressurized situation close to steel, the force request of bar connecting can be met, and meet stressed concertedness, and, it shows the carbonization resistance exceeding tens times than ordinary concrete between the load-bearing operating period, during thin sight makes it and reinforcing bar co-operation without the self-healing capability of pore substantially, durability is ensured, based on these advantages, significantly can save bar splicing length of an interval degree, simplify bar splice treatment process, and then it is cost-saving.
As shown in Figure 2, the diameter of the lap length L1 of above-mentioned reserved steel bar one 1a and reserved steel bar two 2a to be 3d ~ 5d, d be embedded bar.So can ensure the embedded bar yield failure when tension or pressurized in precast rc slab, and can not extract because of stressed, thus ensure the stability of structure.
Please continue to refer to Fig. 2, above-mentioned steel bar connecting structure also comprises some uniform connecting reinforcements 4 (reinforcing bar parallel with y-axis), and connecting reinforcement 4 is vertical with reserved steel bar 1a, 2a to be arranged, and its colligation is fixed on reserved steel bar 1a, 2a.As most preferred embodiment, at the lap position of two reserved steel bars 1a, 2a, a first connecting reinforcement 4a is set, that is, first connecting reinforcement 4a fixes with the end banding of reserved steel bar one 1a and reserved steel bar two 2a respectively, to improve the bonding strength of reserved steel bar one 1a and reserved steel bar two 2a.
The length L2 of above-mentioned steel bar connecting structure is 100mm ~ 200mm, and the above-mentioned length of the present embodiment adopts 150mm, can meet the construction requirement of each class formation.
The end of precast rc slab 1 and precast concrete plank 22 is also provided with concavo-convex alternate keyway 6, is convenient to the connective stability of the high performance cement-based composites strengthening precast rc slab and after-pouring.
Embodiment two: composition graphs 1 to Fig. 3 illustrates the construction method of steel bar connecting structure of the present invention, and concrete steps are as follows:
One, as shown in Figure 1, in the end of precast rc slab 1 and precast rc slab 22, reserved steel bar one 1a and reserved steel bar two 2a is set, after satisfied structure or force request, reserved after-pouring region 3 between two spaced precast rc slabs 1 and precast rc slab 22;
Two, as depicted in figs. 1 and 2, make the end of reserved steel bar one 1a and reserved steel bar two 2a in after-pouring region 3, mutually overlap also colligation to fix;
Three, as shown in Figure 3, in after-pouring region 3, build high performance cement-based composites, after the intensity that it reaches designing requirement, stripping, completes the construction of steel bar connecting structure.
The construction method of steel bar connecting structure of the present invention, after satisfied structure or force request, reserved after-pouring region between two precast rc slabs, the end of the reserved steel bar in two precast rc slabs is overlapped mutually in after-pouring region, and high performance cement-based composites is built in after-pouring region, itself and reserved steel bar is made to form firmly durable steel bar connecting structure, the high adhesion stress of high performance cement-based composites and itself characteristic that is high-strength, high-durability, make steel bar connecting structure place not easily recurring structure destruction; And the high fluidity of high performance cement-based composites and easy-to-handle seam properties, can stop syndeton position and percolating water phenomenon occurs; Significantly, above-mentioned construction method makes after-pouring zone length shorten, reserved steel bar can straightly be arranged, do not need to bend up, weld or set up the process such as sleeve, the overlap length of reserved steel bar is shortened greatly, and steel bar connecting structure width reduction is original more than 1/4th, significantly reduces amount of reinforcement, constructing operation is more simple, compares other link technique construction effect higher.
Preferably, in described step 2, the diameter of the lap length L1 of reserved steel bar one 1a and reserved steel bar two 2a end to be 3d ~ 5d, d be reserved steel bar.
Better, step 2 also comprises, and also arranges some connecting reinforcements 4 in after-pouring region 3, connecting reinforcement 4 perpendicular to reserved steel bar and colligation be fixed on reserved steel bar.
Foregoing description is only the description to present pre-ferred embodiments, any restriction not to the scope of the invention, and any change that the those of ordinary skill in field of the present invention does according to above-mentioned disclosure, modification, all belong to the protection domain of claims.
Claims (9)
1. a steel bar connecting structure, it is characterized in that: described steel bar connecting structure is between spaced two precast reinforced concrete structures, the end of two described precast reinforced concrete structures is equipped with reserved steel bar, described steel bar connecting structure comprises the main body of being built by high performance cement-based composites, and is coated on the reserved steel bar of the mutual overlap joint in described main body.
2. steel bar connecting structure according to claim 1, is characterized in that: the diameter of the lap length L1 of described reserved steel bar to be 3d ~ 5d, d be described reserved steel bar.
3. steel bar connecting structure according to claim 1, is characterized in that: described steel bar connecting structure also comprises some uniform connecting reinforcements, and described connecting reinforcement is vertical with described reserved steel bar to be arranged and is fixed on described reserved steel bar.
4. steel bar connecting structure according to claim 3, is characterized in that: the lap position of described reserved steel bar fixes at least one described connecting reinforcement.
5. steel bar connecting structure according to claim 1, is characterized in that: the length L2 of described steel bar connecting structure is 100mm ~ 200mm.
6. the steel bar connecting structure according to any one of claim 1 to 5, is characterized in that: the end of described precast reinforced concrete structure is also provided with concavo-convex alternate keyway.
7. the construction method of steel bar connecting structure as described in any one of claim 1 to 6, step is as follows:
One, after satisfied structure or force request, reserved after-pouring region between two spaced precast reinforced concrete structures;
Two, overlap joint colligation are fixed mutually in casting area in the rear to make the end of the reserved steel bar in two described precast reinforced concrete structures;
Three, build high performance cement-based composites in casting area in the rear, after the intensity that it reaches designing requirement, stripping, completes the construction of described steel bar connecting structure.
8. construction method according to claim 7, is characterized in that: in described step 2, the diameter of the lap length L1 of described reserved steel bar end to be 3d ~ 5d, d be embedded bar.
9. construction method according to claim 7, is characterized in that, described step 2 also comprises, and also arranges some described connecting reinforcements in described after-pouring region, and described connecting reinforcement is perpendicular to described reserved steel bar and be fixed on described reserved steel bar.
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| CN201510351637.XA CN104929320A (en) | 2015-06-23 | 2015-06-23 | Rebar connecting structure and construction method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106436569A (en) * | 2016-11-24 | 2017-02-22 | 宁波大学 | Prestressed bridge surface connection device and prefabrication method and construction method thereof |
| CN106639003A (en) * | 2016-12-29 | 2017-05-10 | 上海市政工程设计研究总院（集团）有限公司 | Reinforced concrete member post-cast strip and construction method of same |
| CN107013040A (en) * | 2017-06-02 | 2017-08-04 | 杭州宥盛建筑科技有限公司 | The construction method of floor is poured after a kind of sleeve built-in type |
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| JP2006104854A (en) * | 2004-10-07 | 2006-04-20 | Sumitomo Mitsui Construction Co Ltd | Column-beam joint structure of building and its joint method |
| CN202787046U (en) * | 2012-09-14 | 2013-03-13 | 永升建设集团有限公司 | Negative moment beam pre-stressed precast box girder connecting structure |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106436569A (en) * | 2016-11-24 | 2017-02-22 | 宁波大学 | Prestressed bridge surface connection device and prefabrication method and construction method thereof |
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| CN107013040A (en) * | 2017-06-02 | 2017-08-04 | 杭州宥盛建筑科技有限公司 | The construction method of floor is poured after a kind of sleeve built-in type |
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Application publication date: 20150923 |