CN102677569B - Positioning support for dowel bars at concrete pavement joints - Google Patents
Positioning support for dowel bars at concrete pavement joints Download PDFInfo
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- CN102677569B CN102677569B CN201210144653.8A CN201210144653A CN102677569B CN 102677569 B CN102677569 B CN 102677569B CN 201210144653 A CN201210144653 A CN 201210144653A CN 102677569 B CN102677569 B CN 102677569B
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Abstract
The invention relates to the field of security protection construction of dowel bars at concrete pavement joints, in particular to a positioning support for the dowel bars at the concrete pavement joints. The positioning support solves the problem of accurate putting in place of the traditional dowel bars and comprises a positioning main bar, fixing bars, support legs and inverted hooks; the fixing bars comprise vertical sections which are vertical to the positioning main bar and are movably inserted in positioning holes of the positioning main bar; upper transverse sections which are vertical to the vertical sections and can be clamped and fixed with hook heads of the inverted hooks are fixed at the upper ends of the vertical sections, lower transverse sections which are vertical to the vertical sections and can be used for hooking steel bars of the dowel bars are fixed at the lower ends of the vertical sections, and reset springs which are clamped and fixed above the positioning main bar are sheathed on the vertical sections; the support legs comprise cross bars and vertical bars, wherein the cross bars are connected to the lower side of the positioning main bar, the vertical bars are fixed at two ends of the cross bars; and circular arc claws which are mutually matched and clamped with the steel bars of the dowel bars are arranged at the lower ends of the vertical bars. The positioning support has the advantages of simple structure, reasonable design, easy machining, firm construction, convenience in operation and repeatable utilization property, completely can meet the construction requirement, ensures the construction quality and improves the construction efficiency.
Description
Technical field
The present invention relates to railway container terminal field concrete paving seam crossing dowel bar security protection construction field, be specially a kind of concrete paving seam dowel bar locating support.
Background technology
In concrete paving construction, seam is the weak part of concrete plate, and the damage on road surface is generally that the damage by seam starts.Along with the increase of Driving Loading number of times and increasing of heavily loaded overloaded vehicle, joint slab loading capability often significantly reduces within very short time, and produces the diseases such as purt mud, faulting of slab ends, disconnected plate.Therefore < < highway cement concrete pavement design specifications > > requires every transverse contraction joint heavy, very heavy traffic cement concrete pavement that dowel bar all should be set.
The effect of dowel bar is the stress transmission increasing between adjacent concrete piece, prevent that rigid pavement local pressure is larger, cause rigid pavement differential settlement, transmit stress and make adjacent concrete plate jointly stressed, to improve the load transfer loading capability between plate, disperse vehicular load stress.By jointly sharing of load under dowel bar effect, pavement deflection and damage subsequently can be reduced.The accurate location of dowel bar is extremely important, if placement location is not right, not only the dowel bar effect having brought into play unfavorable to transmit load, on the contrary can be due to steel and concrete linear expansion coefficient difference and very soon that top, pavement joint place is bad, play reaction.
In concrete paving work progress, the lateral pressure of dowel bar owing to being subject to concreting and the vibration of vibrating head very easily produce crooked dislocation, and the accuracy of dowel bar reinforcement bar riding position is controlled compared with other Structural Engineerings are difficult.For guaranteeing that dowel bar fully plays the effect of transmitting stress between adjacent plate, must limit the crooked dislocation of dowel bar, guarantee the accurate of its position.Therefore adopt dowel bar locating support in construction, dowel bar reinforcement bar laid to accurate location.
At present, dowel bar is laid conventional construction method three kinds of the automatic implanter methods of ordinary stent plunging, bottom bracket fixation and dowel bar, as follows respectively:
Ordinary stent plunging, is about to dowel bar reinforcement bar and is positioned over rack leg bottom, by manually jamming on support mobile jib, dowel bar is pressed in concrete.The drawback of the method is in the concrete process of vibration compacting, and dowel bar very easily produces displacement because being collided by vibrating head or pushed by concrete, thereby causes position of sound production inaccurate, affects dowel bar and plays a role.
Bottom bracket fixation, is before concrete pouring construction, the dowel bar support of making is well placed by the location, position marking out in advance, and dowel bar is put as for support upper end, then carry out the method for concrete pouring construction.Although this kind of method is more relatively accurate than ordinary stent plunging location, but support will be implanted in concrete with dowel bar in work progress, can not Reusability, and support will be laid complete before concreting, also just mean and before construction, need to spend the plenty of time, with a large amount of reinforcing bars, make support, this has increased construction cost undoubtedly greatly, extend the engineering time, reduced efficiency of construction.
The automatic implanter method of dowel bar, locates dowel bar by automatic implanter, and above two kinds of methods location is more accurate.But this equipment is extremely expensive, and need during work very high-power, poor stability, large on paver impact, easily cause paver to be short of power, neither optimal selection.
In sum, for laying of dowel bar, all there is different separately shortcomings in above three kinds of methods and the device adopting.
Summary of the invention
The present invention lays in order to solve current concrete construction seam crossing dowel bar the problem accurately putting in place, and a kind of concrete paving seam dowel bar locating support is provided.
The present invention adopts following technical scheme to realize: a kind of concrete paving seam dowel bar locating support, comprises that interval it on has the location mobile jib of locating hole, runs through the fixed bar that is arranged in each locating hole, is arranged on mobile jib below, location and is positioned at the rack leg of fixed bar one side and lower end is fixed on the inversion crotch that mobile jib top, location and upper end gib head are close to fixed bar; Wherein fixed bar comprises perpendicular to location mobile jib and movable is plugged in vertical section in its locating hole, vertically section upper end is fixed with upper crosspiece perpendicular and that can fix with the gib head of being inverted crotch, lower end is fixed with lower crosspiece perpendicular and that dowel bar reinforcement bar can be hooked, vertically in section, is set with and the back-moving spring of locating the fixing of mobile jib top; Rack leg comprises the cross bar being connected with mobile jib below, location, the montant that is fixed on cross bar two ends, and end, montant lower end is provided with the circular arc pawl that cooperatively interacts and fix with dowel bar reinforcement bar.
Adopt structure design of the present invention, during construction, first dowel bar reinforcement bar is stuck under two circular arc pawls of rack leg, firmly press down and rotate fixed bar, under the effect of back-moving spring, make the lower crosspiece of fixed bar be hooked in below dowel bar reinforcement bar, then the upper crosspiece of fixed bar is stuck in the gib head of fixed hook, now dowel bar reinforcement bar plays positioning action by location mobile jib, fixed bar, rack leg and cooperatively interacting of fixed hook; After construction, press down and rotate the upper crosspiece of fixed bar, under the effect of back-moving spring, make it depart from the gib head of fixed hook, and slowly unclamp again after turning to the direction vertical with locating mobile jib, the lower crosspiece of fixed bar also departs from dowel bar reinforcement bar simultaneously, thereby whole locating support can be taken out, reach the object of recycling.
In order further to optimize the structure of this locating support, make it better meet construction requirement, the present invention has also carried out following structure design:
The perpendicular straight section height a that forms fixed bar equals height C and the dowel bar reinforcement bar diameter sum of montant on longitudinal height, rack leg of the length of back-moving spring after deformation completely, location mobile jib, and upper crosspiece length b is 12-15cm, and bottom rail segment length d is 9-11 cm; The montant height C that forms rack leg be top of concrete to the vertical distance at dowel bar reinforcement bar top, the height D of circular arc pawl is 1/2 dowel bar reinforcement bar diameter, the horizontal range B between two circular arc pawls is 2/3 dowel bar reinforcement bar length; Inversion crotch is 8-10cm apart from the horizontal range f of the vertical section of fixed bar, and the vertical distance e being inverted between crotch gib head top and location mobile jib is the length of back-moving spring after complete deformation.
Compared with prior art, the present invention has the following advantages: simple in structure, reasonable in design, very easily process, construct firm, easy to operate, both combined the advantage of ordinary stent and bottom bracket, avoided again the involve great expense drawback of poor stability of the automatic implanter of dowel bar, can lay and play accurate positioning action dowel bar reinforcement bar, and can reuse, through practical proof, can meet construction requirement completely, guaranteed construction quality, improve efficiency of construction, be specially adapted to the construction of laying of heavy traffic concrete paving dowel bar.
Accompanying drawing explanation
Fig. 1 is plane structure schematic diagram of the present invention;
Fig. 2 is facade structures schematic diagram of the present invention;
Fig. 3 is perspective view of the present invention;
Fig. 4 is the structural representation of location mobile jib;
Fig. 5 is the structural representation of fixed bar;
Fig. 6 is the structural representation of rack leg;
Fig. 7 is for being inverted the structural representation of crotch;
Fig. 8 is for location mobile jib, fixed bar, rack leg and be inverted the partial schematic diagram that crotch is combined fixing force transfer bar;
In figure: 1-locating hole; 2-locates mobile jib; Vertical section of 3-fixed bar: 3.1-; 3.2-upper crosspiece; Crosspiece under 3.3-; 4-rack leg: 4.1-cross bar; 4.2-montant; 4.3-circular arc pawl; 5-is inverted crotch; 6-dowel bar reinforcement bar; 7-back-moving spring.
The specific embodiment
A kind of concrete paving seam dowel bar locating support, as shown in Figure 1, 2, 3, comprise that location mobile jib 2(that interval on it has a locating hole 1 is as shown in Figure 4), run through the fixed bar 3 that is arranged in each locating hole, be arranged on mobile jib below, location and be positioned at the rack leg 4 of fixed bar 3 one sides and inversion crotch 5(that lower end is fixed on mobile jib 2 tops, location and upper end gib head next-door neighbour fixed bar 3 as shown in Figure 7); During concrete enforcement, as shown in Figure 4, location mobile jib can be selected channel-section steel, channel-section steel model can be according to condition of construction adjustment, location mobile jib length L is that concrete plate seam length+60cm (locates mobile jib two ends and increases respectively 30cm, be convenient to workman's taking and placing), according to dowel bar quantity and design pitch A, on channel-section steel, offer locating hole, vertical section of diameter of the size of locating hole and fixed bar coincide.
As shown in Figure 5, fixed bar 3 comprises perpendicular to location mobile jib 2 and is movablely plugged in vertical section 3.1 in its locating hole 1, vertically section upper end is fixed with upper crosspiece 3.2 perpendicular and that can fix with the gib head of being inverted crotch 5, lower end is fixed with lower crosspiece 3.3 perpendicular and that dowel bar reinforcement bar 6 can be hooked, vertically in section 3.1, be set with and the back-moving spring 7 of locating mobile jib 2 tops fixings, during concrete making, vertically section 3.1 height a equal the length of back-moving spring 7 after complete deformation, longitudinal height of location mobile jib 2, the height C of montant 4.2 and dowel bar reinforcement bar 6 diameter sums on rack leg 4, upper crosspiece 3.2 length b are 12-15cm, lower crosspiece 3.3 length d are 9-11 cm.During making, for easy to process, vertically section, upper crosspiece and lower crosspiece can be made into one;
As shown in Figure 6, rack leg 4 comprises the cross bar 4.1 being connected with mobile jib 2 belows, location, be fixed on the montant 4.2 at cross bar two ends, end, montant lower end is provided with the circular arc pawl 4.3 that cooperatively interacts and fix with dowel bar reinforcement bar 6, during concrete making, montant 4.2 height C are that top of concrete is to the vertical distance at dowel bar reinforcement bar top, the height D of circular arc pawl 4.3 is 1/2 dowel bar reinforcement bar diameter, horizontal range B between two circular arc pawls is 2/3 dowel bar reinforcement bar length, the radian of circular arc pawl is greater than dowel bar reinforcement bar diameter, and arc end need be through polishing, during making, the montant at cross bar and two ends thereof, the circular arc pawl of montant lower end can be made into one,
As shown in Figure 7, inversion crotch 5 is 8-10cm apart from the horizontal range f of the vertical section 3.1 of fixed bar, and the vertical distance e being inverted between crotch 5 gib head tops and location mobile jib 2 is the length of back-moving spring 7 after complete deformation.The gib head of being inverted crotch needs polishing, and radian is advisable can hook the upper crosspiece of fixed bar.
The concrete implementation step of concrete paving seam dowel bar locating support of the present invention in construction is as follows:
1, before concreting, first need to lay the seaming position of dowel bar and carry out mark in the outside, template both sides of having propped up, and dowel bar reinforcement bar will be put near the seaming position of the outer both sides of template by design quantity;
2,, after concreting starts, until seam crossing concreting, during to design elevation, dowel bar is fixed on locating support of the present invention.Specific practice is: first dowel bar reinforcement bar is stuck under two circular arc pawls of rack leg, firmly press down and rotate fixed bar, under the effect of back-moving spring, make the lower crosspiece of fixed bar be hooked in below dowel bar reinforcement bar, then the upper crosspiece of fixed bar is stuck in the gib head of fixed hook, now dowel bar reinforcement bar plays positioning action by location mobile jib, fixed bar, rack leg and cooperatively interacting of fixed hook;
4, the locating support that installs dowel bar is lifted to the seam crossing of template mark, the concrete paving that need add reinforced mesh is put reinforced mesh after having placed dowel bar fixed support again;
5, place and with internal vibration rod, near locating support, manually vibrate afterwards, while vibrating, need vertical vertical taking-up of inserting near dowel bar reinforcement bar.When slump hour, need to coordinate manually to jam on support bracket fastened location mobile jib, make to locate mobile jib bottom and overlap with top of concrete absolute altitude, to guarantee that dowel bar height lays accurately;
4, after vibration compacting, press down the also upper crosspiece of rotational positioning rack fixed rod, under the effect of back-moving spring, make its gib head that departs from fixed hook, and slowly unclamp after turning to the direction vertical with locating mobile jib again, the lower crosspiece of fixed bar also departs from dowel bar reinforcement bar simultaneously;
5, finally take out whole dowel bar locating support, reach the object of recycling, with three roller bearing eveners, receive face.
Claims (4)
1. a concrete paving seam dowel bar locating support, is characterized in that comprising that interval on it has the location mobile jib (2) of locating hole (1), runs through the fixed bar (3) that is arranged in each locating hole, is arranged on mobile jib below, location and is positioned at the rack leg (4) of fixed bar (3) one sides and the inversion crotch (5) that lower end is fixed on location mobile jib (2) top and upper end gib head next-door neighbour's fixed bar (3); Wherein fixed bar (3) comprises perpendicular to location mobile jib (2) activity and is plugged in vertical section (3.1) in its locating hole (1), vertically section upper end is fixed with upper crosspiece (3.2) perpendicular and that can fix with the gib head of being inverted crotch (5), lower end is fixed with lower crosspiece (3.3) perpendicular and that dowel bar reinforcement bar (6) can be hooked, vertically in section (3.1), is set with and the back-moving spring (7) of locating the fixing of mobile jib (2) top;
Rack leg (4) comprises the cross bar (4.1) being connected with location mobile jib (2) below, the montant (4.2) that is fixed on cross bar two ends, and end, montant lower end is provided with the circular arc pawl (4.3) that cooperatively interacts and fix with dowel bar reinforcement bar (6).
2. a kind of concrete paving seam dowel bar locating support according to claim 1, is characterized in that vertical section (3.1) height a that forms fixed bar (3) equals length, the longitudinal height of locating mobile jib (2), height C and dowel bar reinforcement bar (6) the diameter sum of rack leg (4) upper montant (4.2) of back-moving spring (7) after complete deformation; Upper crosspiece (3.2) length b is 12-15cm, and lower crosspiece (3.3) length d is 9-11 cm.
3. a kind of concrete paving seam dowel bar locating support according to claim 1 and 2, montant (4.2) the height C that it is characterized in that forming rack leg (4) is that top of concrete is to the vertical distance at dowel bar reinforcement bar top, the height D of circular arc pawl (4.3) is 1/2 dowel bar reinforcement bar diameter, and the horizontal range B between two circular arc pawls is 2/3 dowel bar reinforcement bar length.
4. a kind of concrete paving seam dowel bar locating support according to claim 1 and 2, it is characterized in that being inverted crotch (5) is 8-10cm apart from the horizontal range f of the vertical section of fixed bar (3.1), and being inverted crotch (5) gib head top is the length of back-moving spring (7) after complete deformation with the vertical distance e between location mobile jib (2).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210144653.8A CN102677569B (en) | 2012-05-11 | 2012-05-11 | Positioning support for dowel bars at concrete pavement joints |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210144653.8A CN102677569B (en) | 2012-05-11 | 2012-05-11 | Positioning support for dowel bars at concrete pavement joints |
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| CN102677569A CN102677569A (en) | 2012-09-19 |
| CN102677569B true CN102677569B (en) | 2014-04-23 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102926295B (en) * | 2012-10-10 | 2014-08-06 | 中铁十局集团有限公司 | Dual-block-type sleeper preset steel bar truss fixing device |
| CN103572684B (en) * | 2013-09-09 | 2015-10-21 | 青岛林川工程技术咨询有限公司 | A kind of device and using method thereof ensureing concrete pavement dowel level |
| CN105150136B (en) * | 2015-10-21 | 2017-04-05 | 青岛森林金属制品有限公司 | Reinforced mesh molding positioning clamping fixture |
| CN106758716B (en) * | 2017-03-15 | 2018-12-25 | 中交第三公路工程局有限公司 | Dowel bars into cement concrete pavement installs equipment |
| CN107034762A (en) * | 2017-03-23 | 2017-08-11 | 华南理工大学 | A kind of transmission rod locating support of cement concrete pavement based on composite |
| CN110205896A (en) * | 2019-06-03 | 2019-09-06 | 中国建筑土木建设有限公司 | The method of its progress road construction of concrete road surface dowel mounting device and application |
| CN112832097B (en) * | 2021-01-31 | 2022-08-02 | 中交二航局第一工程有限公司 | Accurate positioning and mounting device for middle pull rod of plain concrete road surface layer |
| CN114164738A (en) * | 2021-12-31 | 2022-03-11 | 武汉市市政建设集团有限公司 | Vibration press-in type dowel bar mounting device |
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| CN202626787U (en) * | 2012-05-11 | 2012-12-26 | 中铁十二局集团建筑安装工程有限公司 | Concrete pavement joint dowel bar positioning bracket |
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Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU5354473A (en) * | 1973-03-20 | 1974-09-26 | Cyclone Company Of Australia Limited | Improvements in. building construction |
| CN2087648U (en) * | 1991-05-03 | 1991-10-30 | 胡晓 | Reinforcement positioning support |
| CN2485371Y (en) * | 2001-06-16 | 2002-04-10 | 区次鸿 | Support tray for steel bar |
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| CN202626787U (en) * | 2012-05-11 | 2012-12-26 | 中铁十二局集团建筑安装工程有限公司 | Concrete pavement joint dowel bar positioning bracket |
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Owner name: CHINA RAILWAY 12TH BUREAU GROUP CO., LTD. THE 1ST Free format text: FORMER OWNER: CHINA RAILWAY 12TH BUREAU GROUP CO., LTD. Effective date: 20150623 |
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Effective date of registration: 20150623 Address after: 030024 No. 169 West Main Street, Taiyuan, Shanxi, Yingze Patentee after: BUILDING AND INSTALLING ENGINEER CO., LTD. OF CHINA RAILWAY 12TH BUREAU Group Patentee after: CHINA RAILWAY 12TH BUREAU GROUP Co.,Ltd. Patentee after: THE 1ST ENGINEERING CO.,LTD. OF CHINA RAILWAY URBAN CONSTRUCTION Group Address before: 030024 No. 169 West Main Street, Taiyuan, Shanxi, Yingze Patentee before: BUILDING AND INSTALLING ENGINEER CO., LTD. OF CHINA RAILWAY 12TH BUREAU Group Patentee before: CHINA RAILWAY 12TH BUREAU GROUP Co.,Ltd. |