CN102912739A - Supporting structure for temporary beam pivot below existing bridge cantilever plate - Google Patents
Supporting structure for temporary beam pivot below existing bridge cantilever plate Download PDFInfo
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- CN102912739A CN102912739A CN2012103934911A CN201210393491A CN102912739A CN 102912739 A CN102912739 A CN 102912739A CN 2012103934911 A CN2012103934911 A CN 2012103934911A CN 201210393491 A CN201210393491 A CN 201210393491A CN 102912739 A CN102912739 A CN 102912739A
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Abstract
The invention discloses a supporting structure for a temporary beam pivot below an existing bridge cantilever plate, which belongs to the technical field of temporary beam pivot reinforcing. The supporting structure comprises a steel buttress and a reinforced concrete base (10), wherein the steel buttress is arranged below a cantilever plate and contacted with the cantilever plate, the reinforced concrete base (10) is arranged at the lower part of the steel buttress, the steel buttress comprises two vertically arranged main channel steel supports (7), a top plate (2) and a bottom plate (3), the top plate (2) is connected to the top surfaces of the main channel steel supports (7), and the bottom plate (3) is connected to the bottoms of the main channel steel supports (7), a plurality of ribbed steel plates are connected between the two main channel steel supports (7), a plurality of brackets are respectively among the top plate (2) and the main channel steel supports (7) and among the bottom plate (3) and the main channel steel supports (7), and the reinforced concrete base (10) is connected with the bottom plate (3) of the steel buttress through adjusting bolts (4) preembedded on the reinforced concrete base (10). The supporting structure disclosed by the invention is high in overall stability; the displacement and settlement changes of the supporting structure can be checked at any time in the process of application so as to carry out timely adjustment; and the construction difficulty is low, therefore, lot of manpower can be saved.
Description
Technical field
The present invention relates to a kind ofly when just the beam fulcrum is positioned on the existing bridge outrigger base, under outrigger base, reinforce the just braced structures of 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 the beam of constructing just to reinforce existing line as temporary structure.In jacking construction, construct sometimes just that the fulcrum of beam is positioned on the existing frame roof outrigger base, outrigger base is the weak part of framework, can't bear so large load.Be the framework weak part to be taked to set up large-area design of coupler scaffold support, vertical, the transverse bar spacing of scaffold are 25cm in the past, and adjustable shoring used at the scaffold top.Need expend a large amount of artificial when this braced structures is set up, difficulty of construction is large, speed is slow, high to the original ground requirement for bearing capacity, must disposable adjusting to the right place during scaffold building, in use have train by the time produce dynamic load and vibration, fastener and adjustable shoring have loosening phenomenon, overhaul but manually can't enter in the braced structures, very large potential safety hazard is arranged, and the construction safety coefficient is very low.
Summary of the invention
For the defects that exists in the prior art, the invention provides under a kind of Stability Analysis of Structures, difficulty of construction is little, labor intensive is few, the 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 comprises the steel buttress that is located under the outrigger base and contacts with outrigger base and is located at the reinforced concrete footing that described steel props up pedestal, described steel buttress comprises two channel-section steel main braces that vertically arrange, be connected to the top board of channel-section steel main brace end face, be connected to the base plate of channel-section steel main brace bottom, between two channel-section steel main braces, be connected with some blocks of rib band steel plates, be equipped with several brackets between described top board and the channel-section steel main brace and between described base plate and the 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 the time dynamic load be delivered to ground by the steel buttress, make the stressed transfer of outrigger base stressed by braced structures, guaranteed the just safety of beam fulcrum.
In order to guarantee that the steel buttress reliably contacts with outrigger base, reliably shift the inclined plane that the upper surface of described top board is complementary for the bottom surface with described outrigger base to guarantee the suffered load of outrigger base.
In order to guarantee the resistance to overturning of braced structures, the surface layer of described reinforced concrete footing disposes the reinforcing bar that spacing in length and breadth is 15cm.
The invention has the beneficial effects as follows: the present invention is simple in structure, and resistance to overturning is high, can check at any time that in use its displacement and sedimentation change, and in time adjusts, and has effectively guaranteed traffic safety and personal safety, has greatly improved the construction safety coefficient.Adopt the present invention to carry out just beam fulcrum reinforcing, can save in a large number manually, greatly reducing construction cost.
Description of drawings
Fig. 1 is the structural representation of the specific embodiment of the invention;
Fig. 2 is the A-A schematic diagram among Fig. 1;
Among the figure: 1, existing bridge outrigger base, 2, top board, 3, base plate, 4, adjusting bolt, 5, rib band steel plate, 6, rib band steel plate, 7, the channel-section steel main brace, 8, bracket, 9, the just beam of constructing, 10, concrete bed.
The specific embodiment
The present invention is further illustrated below in conjunction with accompanying drawing:
Shown in accompanying drawing 1-2, just be beam fulcrum support structure under a kind of existing bridge outrigger base, it comprises the steel buttress that is located at existing bridge outrigger base 1 time and contacts with outrigger base and is located at the reinforced concrete footing 10 that described steel props up pedestal.Described steel buttress comprises two channel-section steel main braces 7 that vertically arrange, be connected to the top board 2 of channel-section steel main brace 7 end faces, be connected to the base plate 3 of channel-section steel main brace 7 bottoms, wherein, two channel-section steel main braces 7 arrange face-to-face, be welded with some blocks of rib band steel plates 5 and some blocks of rib band steel plates 6 between two channel-section steel main braces 7, rib band steel plate 5 and rib band steel plate 6 link together two channel-section steel main braces 7 securely.Top board 2 and base plate 3 are steel plate, and its mode by welding is welded on respectively top and the bottom of channel-section steel main brace 7.All be welded with several brackets 8 between described top board 2 and the channel-section steel main brace 7 and between described base plate 3 and the channel-section steel main brace 7.Reinforced concrete footing 10 is the C25 reinforced concrete foundation, and its surface layer disposes that diameter is Φ 16, spacing is the reinforcing bar of 15cm in length and breadth.Also be embedded with adjusting bolt 4 on reinforced concrete footing 10, the base plate 3 of steel buttress is connected on the reinforced concrete footing 10 by adjusting bolt 4.
In order to guarantee that the steel buttress reliably contacts with outrigger base, the inclined plane that the upper surface of described top board 2 is complementary for the bottom surface with described outrigger base.
When the present invention constructs at the scene, should advance at the scene first repeatedly measurement, check the location, the position of Accurate Measurement steel buttress and the height of steel buttress must guarantee on the outrigger base that just beam props up dot center to overlap with steel buttress center of effort under the outrigger base.Then build reinforced concrete footing 10 and pre-buried adjusting bolt 4, simultaneously two channel-section steel main braces 1 of well cutting, top board 2, base plate 3, bracket 8, rib band steel plate 5 and rib band steel plate 6.Treat that base intensity reaches 100%, on seating plane, accurately make steel buttress position, place base plate 3, hold up on base plate 3 two channel-section steel main braces 1 and the location, welding first rib band steel plate 5 fixes two channel-section steels, welding top plate 2 again, welding rib band steel plate 6, bracket steel plate 8, make top board 2 and outrigger base bottom surface be close to closely knit by the nut of adjusting adjusting bolt 4, steel sheet plug packing with 1～5mm thickness in base plate and reinforced concrete footing slit is real, makes load be directly delivered to base to ground by the steel buttress.
The present invention in use, just the dead load of beam and train by the time dynamic load be delivered to ground by the present invention, make the stressed transfer of outrigger base stressed by braced structures, guaranteed the just safety of beam fulcrum.
The present invention in use, can make regular check on train by the dynamic load that produces and vibration to the situation of change of the displacement of steel buttress and sedimentation, find to change the in time finishing of transfiniting.
The present invention is simple in structure, it is simple, with low cost to draw materials conveniently, make, has higher practicality, its solved the difficulty of construction that exists in the existing just beam fulcrum reinforcing technique large, expend a large amount of artificial, structural instabilities, can't overhaul and problem that potential safety hazard is large, can replace existing employing design of coupler scaffold to make the technical scheme that just beam fulcrum is reinforced fully.
Other parts in the present embodiment adopt prior art, do not repeat them here.
Claims (3)
1. just beam fulcrum support structure under the existing bridge outrigger base, it is characterized in that: comprise the steel buttress that is located under the outrigger base and contacts 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) that vertically arrange, 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, between two channel-section steel main braces (7), be connected with some blocks of rib band steel plates, be equipped with several brackets (8) between described top board (2) and the channel-section steel main brace (7) and between described base plate (3) and the channel-section steel main brace (7), described reinforced concrete footing (10) is connected with the base plate (3) of described steel buttress by pre-buried adjusting bolt (4) on it.
2. just beam fulcrum support structure under the existing bridge outrigger base according to claim 1 is characterized in that: the inclined plane that the upper surface of described top board (2) is complementary for the bottom surface with described outrigger base.
3. just beam fulcrum support structure under the existing bridge outrigger base according to claim 1 and 2 is characterized in that: the surface layer of described reinforced concrete footing (10) disposes the reinforcing bar that spacing in length and breadth is 15cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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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| Publication Number | Publication Date |
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| CN102912739A true CN102912739A (en) | 2013-02-06 |
| CN102912739B CN102912739B (en) | 2015-08-26 |
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| CN201210393491.1A Active 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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Citations (9)
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|---|---|---|---|---|
| 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 |
| 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 |
| 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 |
| 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 |
-
2012
- 2012-10-16 CN CN201210393491.1A patent/CN102912739B/en active Active
Patent Citations (9)
| 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 |
| 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 |
| 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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| Publication number | Publication date |
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| CN102912739B (en) | 2015-08-26 |
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