CN102912739B - The construction method of just beam fulcrum support structure under a kind of existing bridge outrigger base - Google Patents
The construction method of just beam fulcrum support structure under a kind of existing bridge outrigger base Download PDFInfo
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- CN102912739B CN102912739B CN201210393491.1A CN201210393491A CN102912739B CN 102912739 B CN102912739 B CN 102912739B CN 201210393491 A CN201210393491 A CN 201210393491A CN 102912739 B CN102912739 B CN 102912739B
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Abstract
To the invention discloses under a kind of existing bridge outrigger base just beam fulcrum support structure, belong to just beam fulcrum reinforcing technique field.It comprise be located at outrigger base under and the steel buttress contacted with outrigger base and be located at the reinforced concrete footing (10) that described steel props up pedestal, described steel buttress comprises two channel-section steel main braces (7) vertically arranged, be connected to the top board (2) of channel-section steel main brace (7) end face, be connected to the base plate (3) of channel-section steel main brace (7) bottom, some blocks of ribbed belt steel plates are connected with between two channel-section steel main braces (7), several brackets (8) are equipped with between described top board (2) and channel-section steel main brace (7) and between described base plate (3) and channel-section steel main brace (7), described reinforced concrete footing (10) is connected with the base plate (3) of described steel buttress by adjusting bolt (4) pre-buried on it.Resistance to overturning of the present invention is high, in use can check its displacement and sedimentation change at any time, adjust in time, and difficulty of construction be low, can save a large amount of artificial.
Description
Technical field
The present invention relates to one when just beam fulcrum is positioned on existing bridge outrigger base, under outrigger base, reinforce the braced structures of just beam fulcrum, belong to just beam fulcrum reinforcing technique field.
Background technology
In railway, construction of the highway, often adopt pipe jacking method, and adopt construction beam to reinforce existing line as temporary structure.In jacking construction, the fulcrum of construction beam is positioned on existing frame roof outrigger base sometimes, and outrigger base is the most weak part of framework, cannot bear so large load.Be take to set up large-area design of coupler scaffold to framework weak part to support, longitudinal, the transverse bar spacing of scaffold are 25cm in the past, and scaffold top uses adjustable shoring.This braced structures needs the artificial of at substantial when setting up, difficulty of construction is large, speed is slow, high to original ground requirement for bearing capacity, must disposablely adjust to the right place during scaffold building, in use have train by time produce dynamic load and vibration, fastener and adjustable shoring have loosening phenomenon, but manually cannot enter in braced structures and overhaul, have very large potential safety hazard, construction safety coefficient is very low.
Summary of the invention
For the above-mentioned defect existed in prior art, to the invention provides under a kind of Stability Analysis of Structures, difficulty of construction is little, labor intensive is few, easy to maintenance existing bridge outrigger base just beam fulcrum support structure.
The present invention is achieved by the following technical solution: just beam fulcrum support structure under a kind of existing bridge outrigger base, its special character is, it comprise be located at outrigger base under and the steel buttress contacted with outrigger base and be located at the reinforced concrete footing that described steel props up pedestal, described steel buttress comprises two channel-section steel main braces vertically arranged, be connected to the top board of channel-section steel main brace end face, be connected to the base plate bottom channel-section steel main brace, some blocks of ribbed belt steel plates are connected with between two channel-section steel main braces, several brackets are equipped with between described top board and channel-section steel main brace and between described base plate and channel-section steel main brace, described reinforced concrete footing is connected with the base plate of described steel buttress by pre-buried adjusting bolt on it.
The present invention can the dead load of just beam and train by time dynamic load be delivered to ground by steel buttress, make the stressed transfer of outrigger base stressed by braced structures, ensure that the safety of just beam fulcrum.
In order to ensure steel buttress and outrigger base reliable contacts, to ensure that the load suffered by outrigger base reliably shifts, the upper surface of described top board is the inclined plane matched with the bottom surface of described outrigger base.
In order to ensure the resistance to overturning of braced structures, the surface layer of described reinforced concrete footing is configured with the reinforcing bar that spacing is in length and breadth 15cm.
The invention has the beneficial effects as follows: structure of the present invention is simple, and resistance to overturning is high, in use can check its displacement and sedimentation change at any time, adjust in time, effectively ensure that traffic safety and personal safety, substantially increase construction safety coefficient.Adopt the present invention to carry out just beam fulcrum to reinforce, can save a large amount of artificial, greatly can reduce construction cost.
Accompanying drawing explanation
Fig. 1 is the structural representation of the specific embodiment of the invention;
Fig. 2 is the A-A schematic diagram in Fig. 1;
In figure: 1, existing bridge outrigger base, 2, top board, 3, base plate, 4, adjusting bolt, 5, ribbed belt steel plate A, 6, ribbed belt steel plate B, 7, channel-section steel main brace, 8, bracket, 9, construction beam, 10, concrete bed.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is further illustrated:
As shown in accompanying drawing 1-2, be just beam fulcrum support structure under a kind of existing bridge outrigger base, it comprises and is located at existing bridge outrigger base 1 time and the steel buttress contacted with outrigger base and be located at the reinforced concrete footing 10 that described steel props up pedestal.Described steel buttress comprises two channel-section steel main braces 7 vertically arranged, be connected to the top board 2 of channel-section steel main brace 7 end face, be connected to base plate 3 bottom channel-section steel main brace 7, wherein, two channel-section steel main braces 7 are arranged face-to-face, some pieces of ribbed belt steel plate A5 are welded with and two channel-section steel main braces 7 link together by some pieces of ribbed belt steel plate B6, ribbed belt steel plate A5 and ribbed belt steel plate B6 securely between two channel-section steel main braces 7.Top board 2 and base plate 3 are steel plate, and it is welded on top and the bottom of channel-section steel main brace 7 respectively by the mode of welding.Several brackets 8 are all welded with between described top board 2 and channel-section steel main brace 7 and between described base plate 3 and channel-section steel main brace 7.Reinforced concrete footing 10 is C25 reinforced concrete foundation, and it is the reinforcing bar that Φ 16, in length and breadth spacing are 15cm that its surface layer is configured with diameter.Reinforced concrete footing 10 is also embedded with adjusting bolt 4, and the base plate 3 of steel buttress is connected on reinforced concrete footing 10 by adjusting bolt 4.
In order to ensure steel buttress and outrigger base reliable contacts, the upper surface of described top board 2 is the inclined plane matched with the bottom surface of described outrigger base.
When the present invention constructs at the scene, first should enter measurement repeatedly at the scene, check location, the position of Accurate Measurement steel buttress and the height of steel buttress, must ensure that outrigger base Shang Bianliangzhi dot center overlaps with outrigger base Xia Gang buttress center of effort.Then pouring reinforcement concrete base 10 pre-buried adjusting bolt 4, simultaneously well cutting two channel-section steel main braces 7, top board 2, base plate 3, bracket 8, ribbed belt steel plate A5 and ribbed belt steel plate B6.Treat that base intensity reaches 100%, seating plane is accurately made steel buttress position, place base plate 3, two channel-section steel main braces 7 to be holded up on base plate 3 and to locate, first weld ribbed belt steel plate A5 two channel-section steels are fixed, welding top plate 2 again, welding ribbed belt steel plate B6, bracket steel plate 8, top board 2 and outrigger base bottom surface is made to be close to closely knit by the nut adjusting adjusting bolt 4, real with the steel sheet plug packing of 1 ~ 5mm thickness in base plate and reinforced concrete footing gap, make load can be directly delivered to base to ground by steel buttress.
The present invention in use, just the dead load of beam and train by time dynamic load be delivered to ground by the present invention, make the stressed transfer of outrigger base stressed by braced structures, ensure that the safety of just beam fulcrum.
The present invention in use, can make regular check on the dynamic load that train passes through to produce and the situation of change vibrated the displacement of steel buttress and sedimentation, finds that change is transfinited and repairs in time.
Structure of the present invention is simple, draw materials conveniently, make simple, with low cost, there is higher practicality, which solve that the difficulty of construction existed in existing just beam fulcrum reinforcing technique is large, at substantial is artificial, structural instability, the problem of overhauling and potential safety hazard is large cannot be carried out, the technical scheme that existing employing design of coupler scaffold can be replaced completely to make just beam fulcrum reinforce.
Other parts in the present embodiment adopt prior art, do not repeat them here.
Claims (1)
1. the construction method of just beam fulcrum support structure under an existing bridge outrigger base, it is characterized in that: described braced structures comprise be located at outrigger base under and the steel buttress contacted with outrigger base and be located at the reinforced concrete footing (10) that described steel props up pedestal, described steel buttress comprises two channel-section steel main braces (7) vertically arranged, be connected to the top board (2) of channel-section steel main brace (7) end face, be connected to the base plate (3) of channel-section steel main brace (7) bottom, some blocks of ribbed belt steel plates are connected with between two channel-section steel main braces (7), several brackets (8) are equipped with between described top board (2) and channel-section steel main brace (7) and between described base plate (3) and channel-section steel main brace (7), described reinforced concrete footing (10) is connected with the base plate (3) of described steel buttress by adjusting bolt (4) pre-buried on it, the upper surface of described top board (2) is the inclined plane matched with the bottom surface of described outrigger base, the surface layer of described reinforced concrete footing (10) is configured with the reinforcing bar that spacing is in length and breadth 15cm, its construction method is: (one) first measures position and the height of braced structures at the scene, ensures that outrigger base Shang Bianliangzhi dot center overlaps with the center of effort of outrigger base lower support structure, (2) pouring reinforcement concrete base (10) pre-buried adjusting bolt (4), simultaneously well cutting channel-section steel main brace (7), top board (2), base plate (3), bracket (8), ribbed belt steel plate at the scene, (3) treat that the intensity of reinforced concrete footing (10) reaches 100%, accurately make the position of steel buttress thereon, place base plate (3), two channel-section steel main braces (7) are holded up and goes up at base plate (3) and locate, between two channel-section steel main braces, weld ribbed belt steel plate two channel-section steel main braces are fixed, then welding top plate (2) and bracket (8), (4) make top board (2) and outrigger base bottom surface be close to closely knit by adjustment adjusting bolt (4), fill in the gap between base plate (3) and reinforced concrete footing (10) and fill out steel sheet.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210393491.1A CN102912739B (en) | 2012-10-16 | 2012-10-16 | The construction method of just beam fulcrum support structure under a kind of existing bridge outrigger base |
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| CN201210393491.1A CN102912739B (en) | 2012-10-16 | 2012-10-16 | The construction method of just beam fulcrum support structure under a kind of existing bridge outrigger base |
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| CN102912739A CN102912739A (en) | 2013-02-06 |
| CN102912739B true CN102912739B (en) | 2015-08-26 |
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| CN1764758A (en) * | 2003-04-07 | 2006-04-26 | 卞沆龙 | Repair and reinforcement system of existing structure using reaction force of pressurizing means and method thereof |
| CN201406844Y (en) * | 2009-05-20 | 2010-02-17 | 北京城乡建设集团有限责任公司 | Support of middle flange plate construction formwork of concrete-steel beam |
| CN101736705A (en) * | 2008-11-24 | 2010-06-16 | 中铁十六局集团有限公司 | Military frustum dual control supporting technology |
| CN101748667A (en) * | 2009-12-22 | 2010-06-23 | 重庆交通大学 | Side slope lattice foundation cantilever structure composite road |
| CN201786041U (en) * | 2010-09-27 | 2011-04-06 | 北京市新发京建工贸有限公司 | Steel support |
| CN201826258U (en) * | 2010-08-16 | 2011-05-11 | 北京市新发京建工贸有限公司 | Steel support buttress fixing device |
| CN202830788U (en) * | 2012-10-16 | 2013-03-27 | 中铁十局集团有限公司 | Supporting structure with beam fulcrum below bridge cantilever |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201738242U (en) * | 2010-06-24 | 2011-02-09 | 中国一冶集团有限公司 | Rigid supporting device for mounting of bridge transitional span T-shaped edge beam |
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2012
- 2012-10-16 CN CN201210393491.1A patent/CN102912739B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09195228A (en) * | 1996-01-17 | 1997-07-29 | Kawatetsu Kizai Kogyo Kk | Build-up trestle for bridge pier reinforcing work and its using method |
| CN1764758A (en) * | 2003-04-07 | 2006-04-26 | 卞沆龙 | Repair and reinforcement system of existing structure using reaction force of pressurizing means and method thereof |
| CN101736705A (en) * | 2008-11-24 | 2010-06-16 | 中铁十六局集团有限公司 | Military frustum dual control supporting technology |
| CN201406844Y (en) * | 2009-05-20 | 2010-02-17 | 北京城乡建设集团有限责任公司 | Support of middle flange plate construction formwork of concrete-steel beam |
| CN101748667A (en) * | 2009-12-22 | 2010-06-23 | 重庆交通大学 | Side slope lattice foundation cantilever structure composite road |
| CN201826258U (en) * | 2010-08-16 | 2011-05-11 | 北京市新发京建工贸有限公司 | Steel support buttress fixing device |
| CN201786041U (en) * | 2010-09-27 | 2011-04-06 | 北京市新发京建工贸有限公司 | Steel support |
| CN202830788U (en) * | 2012-10-16 | 2013-03-27 | 中铁十局集团有限公司 | Supporting structure with beam fulcrum below bridge cantilever |
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| CN102912739A (en) | 2013-02-06 |
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