CN102191745B - Bridge - Google Patents
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- CN102191745B CN102191745B CN 201110083979 CN201110083979A CN102191745B CN 102191745 B CN102191745 B CN 102191745B CN 201110083979 CN201110083979 CN 201110083979 CN 201110083979 A CN201110083979 A CN 201110083979A CN 102191745 B CN102191745 B CN 102191745B
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- girder
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- gripper shoe
- web plate
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- 229910000831 Steel Inorganic materials 0.000 claims description 16
- 239000004567 concrete Substances 0.000 claims description 16
- 239000010959 steel Substances 0.000 claims description 16
- 238000005728 strengthening Methods 0.000 description 8
- 238000010276 construction Methods 0.000 description 6
- 238000005336 cracking Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 230000005484 gravity Effects 0.000 description 4
- 201000010099 disease Diseases 0.000 description 3
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000002787 reinforcement Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000011150 reinforced concrete Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000007943 implant Substances 0.000 description 1
- 230000003137 locomotive effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Abstract
The invention discloses a bridge. The bridge comprises a main beam (1) and a pier for supporting the main beam (1), wherein the main beam (1) comprises a main beam web plate (3) arranged on the pier and main beam flange plates (2) extending from the upper end of the main beam web plate (3) to two sides; the beam part structure also comprises at least one auxiliary beam; and the at least one auxiliary beam is fixedly supported between the main beam flange plate (2) and the pier on at least one side of the main beam web plate (3). By arranging the auxiliary beam below the main beam flange plates of the main beam of the bridge, the bearing capacity of the bridge is increased, and higher transport requirement can be further met.
Description
Technical field
The present invention relates to building field, more specifically, relate to a kind of bridge, as railroad bridge.
Background technology
Bridge refers to cross over building natural or that cultural obstacle is built for road, for example, crosses over the bridge in rivers and gully.Usually, bridge comprises the bridge pier of girder and this girder of support.According to the difference of purposes, bridge can be divided into highway bridge and railroad bridge etc.
In recent years, along with the development of highway transportation and railway transportation, the intensity of bridge is had higher requirement.Take railway transportation as example, in order to improve the transport capacity of railway transportation, produced the heavy haul railway transportation.So-called heavy haul railway transportation refers under certain railway technology equipment condition, adopts the means of transportation of high-power locomotive (or several) traction heavy haul train.And the major measure that improves the trailing weight of heavy haul train comprises two aspects: be the maximization of train on the one hand, what namely axle was heavy improves constantly; The continuous increase of a train marshalling list number on the other hand.
In order to make Existing Railway Bridges satisfy the requirement of heavy haul train, just need to reinforce existing railroad bridge.The present Major Diseases that the reinforcement means of Existing Railway Bridges mostly is for Existing Railway Bridges carries out transversely strengthening.
Shown in Fig. 1 is a kind of sectional view of girder 1 of Existing Railway Bridges, and this girder 1 comprises two girder web plates 3 being arranged on bridge pier and the girder frange plate 2 that extends to both sides from the upper end of this girder web plate section 3.To the transversely strengthening structure of this railroad bridge as shown in Figures 2 and 3, this transversely strengthening structure comprises many reinforced steels 4 and a plurality of duct, these a plurality of ducts are spaced apart from each other and pass each girder web plate 3 along the horizontal direction of bridge, and every reinforced steel 4 passes each duct and is separately fixed on corresponding girder web plate 3.And then the cavity part fluid concrete between reinforced steel 4 places and two girder web plates 3, and obtain reinforced concrete 5 together with reinforced steel 4, Existing Railway Bridges is carried out transversely strengthening.
The reinforcement means of this Existing Railway Bridges has improved globality and the lateral stiffness of the railroad bridge of standardized designs, has eliminated the diseases such as diaphragm cracking, lateral amplitude of vibration increasing, has substantially satisfied the carrying demand of the goods train of the heavy 25t of axle.
But, from world wide, use the train of heavy, the low deadweight of macro-axis, low power to become the direction of current heavy haul railway transportation development, the heavy 25t that surpassed of the axle of a lot of trains.Strengthen because the train axle heavily increases rear load effect, carry out railroad bridge supporting capacity after transversely strengthening and still can't satisfy axle and heavily surpass the operation of the train of 25t.
Therefore, how to improve the supporting capacity of bridge, become this area problem demanding prompt solution to satisfy higher movement requirement.
Summary of the invention
The purpose of this invention is to provide a kind of bridge, this bridge has higher supporting capacity, can satisfy higher movement requirement
To achieve these goals, the invention provides a kind of bridge, this bridge comprises girder and supports the bridge pier of this girder, described girder comprises the girder web plate that is arranged on described bridge pier and the girder frange plate that extends to both sides from the upper end of this girder web plate, described girder also comprises at least one floor stringer, and this at least one floor stringer is fixedly supported between described girder frange plate and described bridge pier at least one side of described girder web plate.
Preferably, described floor stringer comprises gripper shoe, and this gripper shoe is supported between the soffit and described bridge pier of described girder frange plate vertically.
Preferably, this bridge also comprises top flange plate, and this top flange plate is laid on the soffit of described girder frange plate, and this top flange plate is connected with the upper end of described gripper shoe.
Preferably, described bridge also comprises concrete structure, and described top flange plate is laid on the soffit of described girder frange plate by this concrete structure.
Preferably, this bridge also comprises the bottom wing listrium, and this bottom wing listrium is arranged on described bridge pier, and this bottom wing listrium is connected with the lower end of described gripper shoe.
Preferably, described top flange plate, described gripper shoe and described bottom wing listrium form " work " font structure.
Preferably, this bridge also comprises stiffening rib, and this stiffening rib is fixedly connected between described floor stringer and described girder web plate.
Preferably, described bridge also comprises junction plate, and this junction plate is fitted in described girder web plate on the surface of described floor stringer, and described stiffening rib is fixedly connected between described junction plate and described floor stringer.
Preferably, described girder web plate is a plurality of.
Preferably, this bridge also comprises many reinforced steels and a plurality of duct, these a plurality of ducts are spaced apart from each other and pass each girder web plate along the horizontal direction of described bridge, and every described reinforced steel passes each duct and is separately fixed on corresponding girder web plate.
By below the girder frange plate of bridge, floor stringer being set, increased the supporting capacity of bridge, can further satisfy higher movement requirement.
Other features and advantages of the present invention will partly be described in detail in the specific embodiment subsequently.
Description of drawings
Accompanying drawing is to be used to provide a further understanding of the present invention, and consists of the part of manual, is used from explanation the present invention with the following specific embodiment one, but is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the cross-sectional view of the girder of Existing Railway Bridges;
Fig. 2 is the transversely strengthening structure elevation of Existing Railway Bridges;
Fig. 3 is the B-B sectional view of the transversely strengthening structure of Existing Railway Bridges;
Fig. 4 is the elevation of a part of the bridge of one embodiment of the present invention;
Fig. 5 is the A-A sectional view of the part of Fig. 4 Bridge;
Fig. 6 is the B-B sectional view (only showing a side) of the part of Fig. 4 Bridge.
Description of reference numerals
1 girder 2 girder frange plates
3 girder web plate 4 reinforced steels
5 reinforced concrete 6 gripper shoes
7 top flange plate 8 bottom wing listriums
9 crab-bolt 10 stiffening ribs
11 junction plates
The specific embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is elaborated.Should be understood that, the specific embodiment described herein only is used for description and interpretation the present invention, is not limited to the present invention.
The below is described in detail bridge provided by the invention take the heavy haul railway bridge as example.
Fig. 4 is the elevation of a part of the bridge of one embodiment of the present invention.This bridge comprises girder 1 and supports the bridge pier (not shown) of this girder 1, girder 1 comprises the girder web plate 3 that is arranged on bridge pier and the girder frange plate 2 that extends to both sides from the upper end of this girder web plate 3, girder 1 also comprises at least one floor stringer, and this at least one floor stringer is fixedly supported between girder frange plate 2 and bridge pier at least one side of girder web plate 3.
When train was started, the gravity of train acted on girder frange plate 2 and girder web plate 3 simultaneously.For existing bridge, the girder frange plate 2 of girder 1 is the cantilever construction with respect to the girder web plate 3 of girder 1, and therefore, the gravity that acts on girder girder frange plate 2 can be in this girder frange plate 2 and the girder web plate 3 larger moments of flexure of intersections formation.The girder frange plate 2 of existing bridge and the bond strength of girder web plate 3 can satisfy the operating demands of ordinary train, but for the very large macro-axis heavy train of own wt, probably girder frange plate 2 and the moment of flexure of the intersection of girder web plate 3 excessively produce cracking, the phenomenon such as collapse owing to acting on.In addition, when train load increased again, not only above-mentioned position produced cracking, the phenomenon that collapses, and girder web plate etc. also can produce cracking, phenomenon collapses.
Arrange below the girder frange plate 2 of girder 1 have the floor stringer of enough Rigidity and strengths after, when train operation, this floor stringer can provide support force upwards for this girder frange plate 2 below girder frange plate 2, thereby can offset and share a part of gravity of train, and then reduced the moment of flexure of girder frange plate 2 with the intersection of girder web plate 3, thereby greatly improved the supporting capacity of bridge at vertical direction.And, when the macro-axis heavy train when the bridge, floor stringer can with the common compatible deformation of girder 1, improved the fatigue resistance of bridge.
Described floor stringer can be arranged on the outside of the girder web plate 3 of girder 1, also can be arranged on the both sides of girder 1, as long as can the girder frange plate 2 of girder 1 be provided a supporting role.And the length bearing of trend of floor stringer is consistent with the length bearing of trend of girder 1.Both can on the whole length direction of girder 1, floor stringer be set, also can be as required and the floor stringer piecewise is arranged on the length direction of girder 1.
Floor stringer of the present invention can have various structures, for example, floor stringer can be that the cross section that extends along the bridge length direction is the concrete structure of rectangle, can be also to have certain thickness steel plate, as long as can provide a supporting role below girder frange plate 2.
Fig. 6 is the B-B sectional view (only showing a side) of the part of Fig. 4 Bridge.As shown in Figure 6, for economical with materials, preferably, floor stringer can comprise gripper shoe 6, and this gripper shoe 6 is supported between the soffit and bridge pier of girder frange plate 2 vertically.Floor stringer is set to comprise that gripper shoe 6 can take full advantage of the space under existing bridge, and train can be offset effectively to the gravity of the pressure of girder frange plate 2 and girder frange plate 2 self in the below that gripper shoe 6 is set to be supported on vertically girder frange plate 2.Certainly, described herein support vertically do not refer to gripper shoe 6 on how much definitely vertically, but can realize being as the criterion in producing with reality.For example, the angle between gripper shoe 6 and horizontal plane can be 90 degree ± 5 degree.
Gripper shoe 6 can be concrete structure, also can be steel work.Gripper shoe 6 can be arranged on by various ways the below of girder frange plate 2, and for example gripper shoe 6 can directly be connected with girder frange plate 2.
As shown in Figure 6, be applied to the pressure of girder frange plate 2 in order to alleviate gripper shoe 6, and facilitate the setting of gripper shoe 6, preferably, bridge of the present invention can also comprise top flange plate 7, this top flange plate 7 is laid on the soffit of girder frange plate 2, and this top flange plate 7 is connected with the upper end of gripper shoe 6.
With after the upper end of gripper shoe 6 is connected, gripper shoe 6 is connected with girder frange plate 2 indirectly by top flange plate 7, has increased contact area with the soffit of top flange plate 7, has reduced gripper shoe 6 and has acted on pressure on girder frange plate 2.And, when train process bridge, the support force that gripper shoe 6 offers on girder frange plate 2 is evenly distributed on girder frange plate 2 by top flange plate 7, and girder frange plate 2 can not bear extra moment of flexure because having increased gripper shoe 6, is conducive to improve load carrying capacity of bridge.Top flange plate 7 can perpendicular to gripper shoe 6, also can be not orthogonal to gripper shoe 6.Preferably, top flange plate 7 is perpendicular to gripper shoe 6, and when train was by bridge like this, top flange plate 7 can not produce component in the horizontal direction.
Usually, top flange plate 7 is laid on the soffit of girder frange plate 2 by concrete structure.This concrete structure can not only play connection function, but also the effect that can play consolidate girder frange plate 2 and improve girder 1 supporting capacity.Top flange plate 7 is not limited in by concrete structure and is laid on the soffit of girder frange plate 2, for example, can on top flange plate 7, the duct be set, and punch on the soffit of girder frange plate 2 and crab-bolt is set, then by securing member, top flange plate 7 is laid on the soffit of girder frange plate 2.
Preferably, bridge of the present invention can also comprise bottom wing listrium 8, and this bottom wing listrium 8 is laid on bridge pier, and this bottom wing listrium 8 is connected with the lower end of gripper shoe 6.The functional similarity of the function of bottom wing listrium 8 and top flange plate 7 can alleviate gripper shoe 6 and act on pressure on bridge pier, and gripper shoe 6 more stably is supported between girder frange plate 2 and bridge pier.
Can use various ways that bottom wing listrium 8 is arranged on bridge pier.For example, can adopt the laying method similar to top flange plate 7 when bottom wing listrium 8 is set, bottom wing listrium 8 is laid on bridge pier, also can be on bridge pier erection support, then bottom wing listrium 8 is arranged on described bearing.
Preferably, adopt the method at erection support on bridge pier that bottom wing listrium 8 is arranged on bridge pier.Because bottom wing listrium 8 and described bearing can form sliding pair, the friction factor between bottom wing listrium 8 and described bearing is lower at this moment, the resistance in the time of can reducing the bridge slip, thus satisfy the requirement that railroad bridge slides.Described bearing can be laminated rubber bearing, can be also steel support, can be according to concrete structure and the concrete material choice for use different materials of bottom wing listrium 8 and the bearing of structure of bridge pier.
Can on the whole length bearing of trend of gripper shoe 6, bottom wing listrium 8 be set, also bottom wing listrium 8 can only be set on bridge pier.It is pointed out that when arranging of bottom wing listrium 8 can not be satisfied in the top of bridge pier, should be first the top of bridge pier structure be reinforced, for example, the support pinner is set, and then bottom wing listrium 8 is set.
Preferably, top flange plate 7, gripper shoe 6 and bottom wing listrium 8 can form " work " font structure jointly.The power that " work " font structure can act on gripper shoe 6 on girder frange plate 2 and bridge pier distributes more equably, makes the integral bridge structure more stable.So-called I shape is not on absolute sense, but can realize being as the criterion in producing with reality.For example, gripper shoe 6 is not strictly to be positioned on the center line of top flange plate 7 widths with the intersection of top flange plate 7, but can be offset a little to the both sides of the center line of top flange plate 7 widths, offset distance is unlikely causes stressed too inhomogeneous getting final product on top flange plate 7 both sides.Between bottom wing listrium 8 and gripper shoe 6 be connected and top flange plate 7 and gripper shoe 6 between be connected similarly, will repeat no more here.
In order to improve the intensity of bridge, to improve the supporting capacity of bridge, preferably, top flange plate 7, gripper shoe 6 and bottom wing listrium 8 are made by steel plate.For the ease of construction, top flange plate 7 all can be connected with gripper shoe 6 by the mode of welding with bottom wing listrium 8.
In order to guarantee that load can pass to floor stringer by girder, bridge of the present invention can also comprise stiffening rib 10, and this stiffening rib 10 is fixedly connected between floor stringer and girder web plate 3.Stiffening rib 10 is set prevents floor stringer side direction unstability, help to improve the stability of floor stringer.As shown in Figure 5, for economical with materials, but the compartment of terrain arranges stiffening rib 10.
With top flange plate 7 and bottom wing listrium 8 are set in like manner, when stiffening rib 10 is set, junction plate 11 can be set on girder web plate 3, and this junction plate 11 is fitted in girder web plate 3 on the surface of floor stringer, and stiffening rib 10 is fixedly connected between junction plate 11 and floor stringer.By being set, junction plate 11 can reduce the pressure of 10 pairs of girder web plates 3 of stiffening rib.Equally, for economical with materials, can only in the place that is provided with stiffening rib 10, junction plate 11 be set.
Preferably, bridge of the present invention can comprise a plurality of girder web plates 3.Usually, these a plurality of girder web plates 3 are two.When girder web plate 3 is two, preferably, can floor stringer be set respectively in the outside of two girder web plates 3.When train is passed through, the stressed balance more of bridge, the application life that is conducive to improve bridge.
In order to increase the lateral stiffness of bridge, eliminate the diseases such as bridge lateral dividing plate cracking, lateral amplitude of vibration increasing, preferably, bridge of the present invention can also comprise many reinforced steels 4 and a plurality of duct, these a plurality of ducts are spaced apart from each other and pass each girder web plate 3 along the horizontal direction of described bridge, and every reinforced steel 4 passes each duct and is separately fixed on corresponding girder web plate 3.
In order to reach better transversely strengthening effect, preferably, a round road can be set respectively in the upper and lower of girder web plate 3, and in corresponding duct fixing reinforced steel 4.Further preferably, can be at the relative inwall upper concrete of a plurality of girder web plates 3.
In described bridge, floor stringer can be namely making in site hereinbefore, can be also ready-made, and preferably, floor stringer adopts and makes in advance, can shorten on-site construction time like this, does not affect the normal operation of railway.And floor stringer can integral body be made, and is spliced at the scene more complete floor stringer after also can making multistage.
Below in conjunction with Fig. 5, the work progress of a kind of specific embodiment of bridge of the present invention is described:
(1) in advance gripper shoe 6, top flange plate 7 and bottom wing listrium 8 are welded into integral body, form " work " font structure;
(2) determine the position of junction plate 11 between gripper shoe 6 and girder web plate 3, and junction plate 11 is installed;
(3) boring below the girder frange plate 2 of girder 1, and implant connecting reinforcement;
(4) " work " font structure that gripper shoe 6, top flange plate 7 and bottom wing listrium 8 is formed is coupled to integral body, and hoisted in position, and on bridge pier erection support;
(5) stiffening rib 10 and junction plate 11 are spliced;
(6) fluid concrete between girder frange plate 2 and top flange plate 7, complete construction.
By above-mentioned work progress as can be known, be arranged on due to floor stringer between the girder frange plate 2 and bridge pier of girder 1 of bridge, therefore, when on existing bridge, floor stringer being installed, only need the part of existing bridge is processed, very little to the damage that original structure causes, and construction all can utilize the skylight point of operation to carry out, do not affect the driving of existing railway line, operation is disturbed little, and floor stringer can adopt precast construction, and speed of application is fast.
In sum, by below the girder frange plate of bridge, floor stringer being set, increase the supporting capacity of bridge, can further satisfy higher movement requirement.
Although above by railroad bridge, bridge of the present invention has been made indicative description, those skilled in the art should be appreciated that the present invention not only is suitable for railroad bridge, but also are applicable to other bridges, as highway bridge.And; below describe by reference to the accompanying drawings the preferred embodiment of the present invention in detail; but; the present invention is not limited to the detail in above-mentioned embodiment; in technical conceive scope of the present invention; can carry out multiple simple variant to technical scheme of the present invention, these simple variant all belong to protection scope of the present invention.
Need to prove that in addition each the concrete technical characterictic described in the above-mentioned specific embodiment in reconcilable situation, can make up by any suitable mode.For fear of unnecessary repetition, the present invention is to the explanation no longer separately of various possible combinations.
In addition, also can carry out any combination between various embodiment of the present invention, as long as it is without prejudice to thought of the present invention, it should be considered as content disclosed in this invention equally.
Claims (8)
1. bridge, this bridge comprises girder (1) and supports the bridge pier of this girder (1), described girder (1) comprises the girder web plate (3) that is arranged on described bridge pier and the girder frange plate (2) that extends to both sides from the upper end of this girder web plate (3), it is characterized in that, described bridge also comprises at least one floor stringer, this at least one floor stringer is fixedly supported between described girder frange plate (2) and described bridge pier at least one side of described girder web plate (3), the length bearing of trend of described floor stringer is consistent with the length bearing of trend of described girder (1), described bridge also comprises stiffening rib (10), this stiffening rib (10) is fixedly connected between described floor stringer and described girder web plate (3), described floor stringer comprises gripper shoe (6), this gripper shoe (6) is supported between the soffit and described bridge pier of described girder frange plate (2) vertically.
2. bridge according to claim 1, it is characterized in that, this bridge also comprises top flange plate (7), and this top flange plate (7) is laid on the soffit of described girder frange plate (2), and this top flange plate (7) is connected with the upper end of described gripper shoe (6).
3. bridge according to claim 2, is characterized in that, this bridge also comprises concrete structure, and described top flange plate (7) is laid on the soffit of described girder frange plate (2) by this concrete structure.
4. bridge according to claim 3, is characterized in that, this bridge also comprises bottom wing listrium (8), and this bottom wing listrium (8) is arranged on described bridge pier, and this bottom wing listrium (8) is connected with the lower end of described gripper shoe (6).
5. bridge according to claim 4, is characterized in that, described top flange plate (7), described gripper shoe (6) and described bottom wing listrium (8) form " work " font structure.
6. bridge according to claim 1, it is characterized in that, described girder web plate (3) also comprises junction plate (11), this junction plate (11) is fitted in described girder web plate (3) on the surface of described floor stringer, and described stiffening rib (10) is fixedly connected between described junction plate (11) and described floor stringer.
7. the described bridge of any one according to claim 1-6, is characterized in that, described girder web plate (3) is a plurality of.
8. bridge according to claim 7, it is characterized in that, this bridge also comprises many reinforced steels (4) and a plurality of duct, these a plurality of ducts are spaced apart from each other and pass each girder web plate (3) along the horizontal direction of described bridge, and every described reinforced steel (4) passes each duct and is separately fixed on corresponding girder web plate (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN 201110083979 CN102191745B (en) | 2011-04-02 | 2011-04-02 | Bridge |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110083979 CN102191745B (en) | 2011-04-02 | 2011-04-02 | Bridge |
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| CN102191745A CN102191745A (en) | 2011-09-21 |
| CN102191745B true CN102191745B (en) | 2013-06-12 |
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| KR101345197B1 (en) * | 2012-09-19 | 2013-12-27 | 우경기술주식회사 | Psc i-type girder cross-section optimized design methods and their |
| CN103015329A (en) * | 2012-12-31 | 2013-04-03 | 中铁第四勘察设计院集团有限公司 | I-section steel girder reinforcement small box girder structure |
Citations (6)
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|---|---|---|---|---|
| CN2511711Y (en) * | 2001-12-07 | 2002-09-18 | 沈阳铁路局科学技术研究所 | Prestressed lateral strengthened concrete beam |
| JP4020406B2 (en) * | 2006-06-28 | 2007-12-12 | Ｊｆｅ工建株式会社 | Formwork support mechanism and placement method |
| CN201567532U (en) * | 2009-11-30 | 2010-09-01 | 中冶成工建设有限公司 | Novel supporting structure of lid beam of bridge |
| CN101892626A (en) * | 2010-08-02 | 2010-11-24 | 长安大学 | Steel pipe concrete flange combining beam with concrete fender |
| CN101906751A (en) * | 2010-07-20 | 2010-12-08 | 郑志文 | Ready-package emergency bridge and construction method for changing same into permanent bridge |
| CN201730045U (en) * | 2010-08-02 | 2011-02-02 | 长安大学 | Steel tube concrete flange composite beam provided with concrete flange board |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6622442B2 (en) * | 2001-07-30 | 2003-09-23 | Heug Jin Kwon | Combination light-weight deck form, with connectors |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2511711Y (en) * | 2001-12-07 | 2002-09-18 | 沈阳铁路局科学技术研究所 | Prestressed lateral strengthened concrete beam |
| JP4020406B2 (en) * | 2006-06-28 | 2007-12-12 | Ｊｆｅ工建株式会社 | Formwork support mechanism and placement method |
| CN201567532U (en) * | 2009-11-30 | 2010-09-01 | 中冶成工建设有限公司 | Novel supporting structure of lid beam of bridge |
| CN101906751A (en) * | 2010-07-20 | 2010-12-08 | 郑志文 | Ready-package emergency bridge and construction method for changing same into permanent bridge |
| CN101892626A (en) * | 2010-08-02 | 2010-11-24 | 长安大学 | Steel pipe concrete flange combining beam with concrete fender |
| CN201730045U (en) * | 2010-08-02 | 2011-02-02 | 长安大学 | Steel tube concrete flange composite beam provided with concrete flange board |
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