CN209082323U - A kind of super-span steel truss continuous bridge having initial curvature - Google Patents
A kind of super-span steel truss continuous bridge having initial curvature Download PDFInfo
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- CN209082323U CN209082323U CN201821496301.8U CN201821496301U CN209082323U CN 209082323 U CN209082323 U CN 209082323U CN 201821496301 U CN201821496301 U CN 201821496301U CN 209082323 U CN209082323 U CN 209082323U
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 45
- 239000010959 steel Substances 0.000 title claims abstract description 45
- 238000003466 welding Methods 0.000 claims description 5
- 229910000679 solder Inorganic materials 0.000 claims description 3
- 238000010276 construction Methods 0.000 description 25
- 238000010586 diagram Methods 0.000 description 10
- 238000013461 design Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 8
- 230000008901 benefit Effects 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000009417 prefabrication Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000007665 sagging Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model discloses a kind of super-span steel truss continuous bridges for having initial curvature, it is characterized in that, prefabricated each beam section lifting elements including multiple bridge piers (8) and in factory, including the big segment integral hoisting unit (1) of end bay, the big segment lifting unit (2) of first main span, the big segment lifting unit (3) of second main span and the small segment integral hoisting unit (4) of pier top, closure segment unit (5) is connected to each beam section lifting elements under Gravitative Loads there are initial curvature, it is linear smooth when to guarantee that bridge uses, camber is set in each beam section factory and offsets initial curvature.Dead load state pier top hogging moment is considerably reduced, part pier top structural internal force is transferred to span centre section, so that full bridge structure uniform force.
Description
Technical field
The utility model belongs to technical field of bridge construction, more particularly, to a kind of super-span for having initial curvature
Steel truss continuous bridge.
Background technique
Steel truss continuous bridge is that a kind of span ability is larger, and economic performance preferably bridge type obtains in all kinds of bridges at present
Obtain extensive utilization.
When span requires larger, technical problem existing for steel truss continuous bridge mainly has the following aspects: the first, at
Under bridge dead load, the pier top position hogging moment of super-span steel truss continuous bridge is excessive, and the sagging moment of spaning middle section is smaller,
Bridge dead load internal force is unevenly distributed, pier top section stress state control design case, and spaning middle section utilization rate is lower.Using routine
Stress-free state method design and construction when, bridge dead load internal force distribution is not improved always, by increase purlin it is high and
Changing the mode of sectional dimension to adapt to dead load internal force status, brought economic benefit is poor, and excessively high truss depth
Bridge aesthetics performance is poor.Therefore, it is necessary to and add phase from the structural internal force state of adjustment large span steel truss continuous bridge
The construction measure answered, fundamentally improves structural internal force.The second, larger and deeper depth of water bridge location is required for span, it is conventional
Incremental launching construction method in construction method is difficult to realize, and is dissipated and spelled assembled construction method there are heavy workload, constructing operation not sides
Just the problems such as.Therefore, arrangement and method for construction be influence super-span steel truss continuous bridge an important factor for, need to seek it is efficient, economical,
High-precision construction method.
Therefore, for series of technical present in super-span steel truss continuous bridge, super-span steel truss is continuous
The structural internal force state for needing fundamentally to improve large span steel truss continuous bridge in beam bridge design is meeting stress safety, warp
On the basis of Ji property is good, the span ability of bridge is improved.Furthermore, it is desirable to seek suitable for super-span steel truss continuous bridge
Efficiently, economic, high-precision construction method.
Utility model content
Aiming at the above defects or improvement requirements of the prior art, the utility model provides a kind of super-span for having initial curvature
Steel truss continuous bridge is spent, is integrally hung using each beam section lifting elements with camber of prefabrication, including the big segment of end bay
Unit, the big segment lifting unit of the first main span, the big segment lifting unit of the second main span, the small segment integral hoisting unit of pier top are filled,
Each unit is generated initial curvature by Gravitative Loads under simply-supported state on bridge pier, is offset by the camber being arranged in advance initial
It is linear to become beam section design again for deformation, to guarantee linear smooth when bridge uses, it is negative to considerably reduce dead load state pier top
Moment of flexure, part pier top structural internal force is transferred to span centre section, so that full bridge structure uniform force.
To achieve the above object, a kind of super-span steel truss continuous bridge having initial curvature, including multiple bridge piers are provided,
Prefabricated each beam section lifting elements with camber in factory, including the big segment integral hoisting unit of end bay, the first main span are big
The big segment lifting unit of segment lifting unit, the second main span and the small segment integral hoisting unit of pier top, in which:
The small segment integral hoisting unit of pier top is set on other described bridge piers in addition to the bridge pier of two, both ends；
The big segment integral hoisting unit of the end bay at both ends pass through respectively the closure segment unit with it is corresponding described
The small segment integral hoisting unit of pier top is connected；The unit of the small segment integral hoisting of pier top pass through again the closure segment unit with
The big segment lifting unit of one main span is connected, and with the big segment lifting unit of second main span, passes through the closure section list
It is first to be connect with the small segment integral hoisting unit of the pier top, the big segment lifting unit of the second main span and the next section of big section of main span
Section lifting elements are connect by the closure segment unit with the next section of small segment integral hoisting unit of pier top again；
Closure segment unit is connected to each beam section lifting elements under Gravitative Loads there are initial curvature, each beam section
Lifting elements are arranged camber and offset initial deformation, so that pier top structure division internal force is transferred to span centre section.
Further, the closure segment unit, including closure section top boom, closure section web member and closure section lower boom,
Upper boom between the beam section lifting elements of two of adjacent lifting connects and composes closure section top boom, two institutes of adjacent lifting
State two beam section lifting elements that the web member between beam section lifting elements connects and composes closure section web member and adjacent lifting
Between lower boom connect and compose closure section lower boom.
Further, between the closure section top boom, closure section web member and closure section lower boom using bolt or
Site welding form is attached.
Further, it when between closure section top boom, closure section web member and closure section lower boom using bolt, uses
Oblong bolt hole.
Further, stiffening element under being added at pier top above the bridge pier using integral solder form.
Further, at the pier top under stiffening element according to stress need to be arranged two panel lengths or four
Or more panel length.
Further, the continuous bridge is additionally provided with diagonal brace for highway bridge stringer to be connected with lower boom.
In general, it can obtain down the above technical solutions conceived by the present invention are compared with the prior art,
Column the utility model has the advantages that
(1) the super-span steel truss continuous bridge for having initial curvature of the utility model, it is pre- using having for prefabrication
Each beam section lifting elements of camber, including the big segment integral hoisting unit of end bay, the big segment lifting unit of the first main span, the second master
Across big segment lifting unit, the small segment integral hoisting unit of pier top, each unit is on bridge pier, by Gravitative Loads under simply-supported state
Initial curvature is generated, initial deformation is offset by the camber being arranged in advance, it is linear to become beam section design again, to guarantee that bridge uses
When it is linear smooth.By aforesaid operations, dead load state pier top hogging moment, the transfer of part pier top structural internal force are considerably reduced
To span centre section, so that full bridge structure uniform force.
(2) the super-span steel truss continuous bridge for having initial curvature of the utility model, closure segment unit includes closure section
Top boom, closure section web member and closure section lower boom utilize accurate mould for connecting other each beam section lifting elements
Both ends between other lifting elements are used bolt by the closure section component length and connecting structure size that quasi- construction Calculation obtains
It connects or site welding form is attached, so that each beam section lifting elements join end to end, overall leveling.
(3) the super-span steel truss continuous bridge for having initial curvature of the utility model, using whole weldering above bridge pier
Stiffening element under the form of connecing is added at pier top, for further increasing span ability, lower reinforcing structure can according to the needs of stress,
The panel length of two panel lengths or four or more are set.Pier top section is greatly improved in the setting of stiffening element
The bending stiffness of stiff girder reduces the stress state of pier top section structure, further improves the span ability of structure.And
Component processing factory degree is high, precision is high, rapid and convenient of constructing.
Detailed description of the invention
Fig. 1 is a kind of overall cloth that the super-span steel truss continuous bridge for having initial curvature is related to of the utility model embodiment
Set schematic diagram；
Fig. 2 is a kind of bridge knot that the super-span steel truss continuous bridge for having initial curvature is related to of the utility model embodiment
Composition；
Fig. 3 is that a kind of bridge that the super-span steel truss continuous bridge for having initial curvature is related to of the utility model embodiment closes
Imperial section optimal crosssection figure；
Fig. 4 is before a kind of closure that the super-span steel truss continuous bridge for having initial curvature is related to of the utility model embodiment
Pier top main beam structure figure；
Fig. 5 is a kind of lifting pier that the super-span steel truss continuous bridge for having initial curvature is related to of the utility model embodiment
Push up small segment unit schematic diagram；
Fig. 6 is a kind of lifting master that the super-span steel truss continuous bridge for having initial curvature is related to of the utility model embodiment
Across big segment unit schematic diagram；
Fig. 7 is that a kind of closure that the super-span steel truss continuous bridge for having initial curvature is related to of the utility model embodiment is applied
Work completes schematic diagram；
Fig. 8 is before a kind of closure that the super-span steel truss continuous bridge for having initial curvature is related to of the utility model embodiment
The linear relation schematic diagram of each curvature of beam section.
In all the appended drawings, same appended drawing reference indicates identical technical characteristic, specifically: the big segment of 1- end bay is whole
The big segment lifting unit of lifting elements, the first main span of 2-, the big segment lifting unit of the second main span of 3-, the small segment of 4- pier top are integrally hung
Fill unit, 5- closure segment unit, 501- closure section top boom, 502- closure section web member, 503- closure section lower boom, at 6- pier top
Lower stiffening element, 7- diagonal brace, 8- bridge pier, the self weight of 9- beam section simply-supported state is linear, the production of 10- beam section factory is linear, 11- beam section is set
It counts linear.
Specific embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only to explain this
Utility model is not used to limit the utility model.In addition, involved in the various embodiments of the present invention described below
And to technical characteristic can be combined with each other as long as they do not conflict with each other.
Fig. 1 is a kind of overall cloth that the super-span steel truss continuous bridge for having initial curvature is related to of the utility model embodiment
Set schematic diagram.As shown in Figure 1, a kind of super-span steel truss continuous bridge for having initial curvature includes: that the big segment of end bay is integrally hung
Fill unit 1, the big segment lifting unit 2 of the first main span, the big segment lifting unit 3 of the second main span, the small segment integral hoisting list of pier top
Member 4, closure segment unit 5, each lifting elements of continuous bridge are prefabricated in the factory and camber are arranged, and continuous bridge setting is more
A bridge pier 8, intermediate bridge pier top are equipped with the small segment integral hoisting unit 4 of pier top, and the big segment of end bay is arranged in continuous bridge both ends
Integral hoisting unit 1, the big segment integral hoisting unit 1 of the end bay at both ends pass through closure segment unit 5 and corresponding pier top respectively
Small segment integral hoisting unit 4 is connected, and the unit 4 of the small segment integral hoisting of pier top passes through closure segment unit 5 and the first main span again
Big segment lifting unit 2 is connected, and the big segment lifting unit 2 of the first main span and the big segment lifting unit 3 of the second main span pass through closure
Segment unit 5 is connect with the small segment integral hoisting unit 4 of pier top, the big segment lifting unit 3 of the second main span and the next section of big section of main span
Section lifting elements pass through closure segment unit 5 again and connect with the small segment integral hoisting unit 4 of next section of pier top.The utility model uses
The closure state of " having initial curvature ", adequately has adjusted the dead load internal force status of super-span steel truss continuous bridge, substantially
Degree alleviates the excessive situation of dead load state pier top hogging moment, and pier top stiff girder part internal force is transferred to span centre section, is made
It obtains full-bridge internal force and tends to the span ability that structure is uniformly greatly improved, economic span single hole is up to 200m or more.
Fig. 2 is a kind of bridge knot that the super-span steel truss continuous bridge for having initial curvature is related to of the utility model embodiment
Composition；Fig. 3 is a kind of closure that the super-span steel truss continuous bridge for having initial curvature is related to of the utility model embodiment
Section optimal crosssection figure.As shown in Figures 2 and 3, join the two sections of a bridge, etc segment unit 5, including 501- closure section top boom, 502- closure section web member
And 503- closure section lower boom.Closure section component length and connecting structure ruler is calculated by accurate construction simulation process
It is very little, by both ends between the big segment integral hoisting unit 1 of end bay and the small segment integral hoisting unit 4 of pier top using bolt or scene
Welding form is attached, and oblong bolt hole can be used when using bolt.As seen from Figure 3, continuous bridge is also set up
There is diagonal brace 7 for highway bridge stringer to be connected with lower boom.
Further, stiffening element 6 under being added at pier top above bridge pier using integral solder form, for further mentioning
The internode length of two panel lengths or four or more can be arranged according to the needs of stress in high span ability, lower reinforcing structure
Degree.The bending stiffness of pier top section stiff girder is greatly improved in the setting of stiffening element 6, reduces answering for pier top section structure
Power state further improves the span ability of structure.And component processing factory degree is high, precision is high, and construction is quick just
It is prompt.
Fig. 4 is before a kind of closure that the super-span steel truss continuous bridge for having initial curvature is related to of the utility model embodiment
Pier top main beam structure figure, Fig. 4 are a-quadrant partial enlarged view in Fig. 6.Fig. 8 is the closure front-axle beam that the utility model embodiment is related to
Each linear relation schematic diagram of curvature of section.In conjunction with Fig. 8, the big segment integral hoisting unit 1 of end bay, the small segment integral hoisting of pier top list
When prefabricated the beam section factory production linear 10 of arch is made, in freely-supported shape in member 4 and the first big segment lifting unit 2 of main span
Under state, it is deformed into beam section design linear 11 by Gravitative Loads, then with this, carries out the closing construction between each beam section.According to nothing
The construction of stress state construction method, dead load state pier top hogging moment is excessive, and full-bridge internal force is uneven.
Fig. 5 is a kind of lifting pier that the super-span steel truss continuous bridge for having initial curvature is related to of the utility model embodiment
Push up small segment unit schematic diagram.As shown in figure 5, setting bridge pier 8 spaced apart, and pier top is carried out on intermediate bridge pier 8
The construction of small segment integral hoisting unit 4.
Fig. 6 is a kind of lifting master that the super-span steel truss continuous bridge for having initial curvature is related to of the utility model embodiment
Across big segment unit schematic diagram.As shown in fig. 6, being carried out after the completion of bridge pier 8 and the small segment integral hoisting unit 4 of pier top are constructed
The construction of each beam section lifting elements sets up bracket in bridge pier 8 in work progress, and large ship is utilized to lift each big segment of end bay
The small segment integral hoisting unit 4 of integral hoisting unit 1, pier top and the big segment lifting unit of each main span, lifting elements are interim
It is supported on bracket support.
Fig. 7 is that a kind of closure that the super-span steel truss continuous bridge for having initial curvature is related to of the utility model embodiment is applied
Work completes schematic diagram.Bracket is set up in work progress by pier, each beam section lifting elements is completed using large ship lifting, hangs
Dress unit is temporarily supported above on bracket support, lifting elements under simply-supported state by Gravitative Loads, then using this initial curvature as base
Plinth carries out closing construction.Initial deformation is offset by the way that camber is arranged in factory in advance, to guarantee linear when bridge uses put down
It is suitable.By the above work progress, dead load state pier top hogging moment is considerably reduced, part pier top structural internal force is transferred to span centre
Section, so that full bridge structure uniform force.The work progress rapid and convenient.
A kind of super-span steel truss continuous bridge having initial curvature, construction method in accordance with the following steps:
S1: construction basis and bridge pier 8, and bracket is set up in bridge pier 8, each pier top trifle is completed using large ship
The lifting of the unit 4 of section integral hoisting；
S2: the big segment integral hoisting unit of the end bay with camber being prefabricated in the factory successively is lifted using large ship
1, the big segment lifting unit 2 of the first main span, the big segment lifting unit 3 of the second main span and the big segment lifting unit of other main spans
With the big segment integral hoisting unit 1 of other end end bay；
S3: beam section lifting elements, by Gravitative Loads, offset initial deformation by the camber being arranged in advance under simply-supported state,
It becomes beam section design linear 11 again, closure section component length and connecting structure size is calculated by accurate construction simulation process,
By both ends between above-mentioned each beam section lifting elements with initial curvature and the small segment integral hoisting unit 4 of pier top using bolt
Or site welding form carries out closing construction, and oblong bolt hole can be used when using bolt；
S4: second phase and accessory structure construction are carried out, 8 collateral branch's frame of bridge pier is removed.
The utility model uses the method that the design and construction scheme of bridge structure combines, and is adjusted using work progress
At bridge structural internal force, the effective solution economy of super-span steel truss continuous bridge and the technical problem of structure stress are kept away
Exempt from poor by economy caused by the modes such as single adjustment truss depth and structural section using stress-free state method
The problem of.The utility model uses the method that the design and construction scheme of bridge structure combines, and is adjusted using work progress
At bridge structural internal force, the stress performance in section has been given full play to, has improved the economic performance of steel truss continuous bridge.
As it will be easily appreciated by one skilled in the art that the above is only the preferred embodiment of the utility model only, not
For limiting the utility model, any modification made within the spirit and principle of the present invention, equivalent replacement and change
Into etc., it should be included within the scope of protection of this utility model.
Claims (7)
1. a kind of super-span steel truss continuous bridge for having initial curvature, including multiple bridge piers (8), which is characterized in that in factory
Interior prefabricated each beam section lifting elements with camber, including the big segment integral hoisting unit (1) of end bay, the big segment of the first main span
The big segment lifting unit (3) of lifting elements (2), the second main span and the small segment integral hoisting unit (4) of pier top, in which:
The small segment integral hoisting unit (4) of pier top is set to other described bridge piers in addition to the bridge pier (8) of two, both ends
(8) on；
The big segment integral hoisting unit (1) of the end bay at both ends passes through closure segment unit (5) and the corresponding pier respectively
Small segment integral hoisting unit (4) is pushed up to be connected；The unit (4) of the small segment integral hoisting of pier top passes through the closure section list again
First (5) are connected with the big segment lifting unit (2) of a main span, with the big segment lifting unit (3) of second main span, pass through
The closure segment unit (5) connect with the small segment integral hoisting unit (4) of the pier top, the big segment lifting list of the second main span
First (3) and the big segment lifting unit of next section of main span pass through the closure segment unit (5) and the next section of small segment of pier top again
Integral hoisting unit (4) connection；Closure segment unit (5) is connected to each beam section lifting under Gravitative Loads there are initial curvature
Unit, each beam section lifting elements setting camber offsets initial deformation, so that pier top structure division internal force is transferred to span centre
Section.
2. a kind of super-span steel truss continuous bridge for having initial curvature according to claim 1, which is characterized in that described
It joins the two sections of a bridge, etc segment unit (5), including closure section top boom (501), closure section web member (502) and closure section lower boom (503), it is adjacent
Upper boom between two beam section lifting elements of lifting connects and composes closure section top boom (501), and two of adjacent lifting
Web member between the beam section lifting elements connects and composes two beam sections of closure section web member (502) and adjacent lifting
Lower boom between lifting elements connects and composes closure section lower boom (503).
3. a kind of super-span steel truss continuous bridge for having initial curvature according to claim 2, which is characterized in that described
Using bolt or site welding between closure section top boom (501), closure section web member (502) and closure section lower boom (503)
The form of connecing is attached.
4. a kind of super-span steel truss continuous bridge for having initial curvature according to claim 2 or 3, which is characterized in that
When between closure section top boom (501), closure section web member (502) and closure section lower boom (503) using bolt, using length
Circular bolt holes.
5. a kind of super-span steel truss continuous bridge for having initial curvature according to claim 1, which is characterized in that described
Stiffening element (6) under being added at pier top above bridge pier (8) using integral solder form.
6. a kind of super-span steel truss continuous bridge for having initial curvature according to claim 5, which is characterized in that described
Stiffening element (6) is according to the panel length for needing to be arranged two panel lengths or four or more of stress under at pier top.
7. a kind of super-span steel truss continuous bridge for having initial curvature according to claim 2, which is characterized in that described
Continuous bridge is additionally provided with diagonal brace (7) for highway bridge stringer to be connected with lower boom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821496301.8U CN209082323U (en) | 2018-09-13 | 2018-09-13 | A kind of super-span steel truss continuous bridge having initial curvature |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821496301.8U CN209082323U (en) | 2018-09-13 | 2018-09-13 | A kind of super-span steel truss continuous bridge having initial curvature |
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| Publication Number | Publication Date |
|---|---|
| CN209082323U true CN209082323U (en) | 2019-07-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821496301.8U Withdrawn - After Issue CN209082323U (en) | 2018-09-13 | 2018-09-13 | A kind of super-span steel truss continuous bridge having initial curvature |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109056496A (en) * | 2018-09-13 | 2018-12-21 | 中铁第四勘察设计院集团有限公司 | A kind of super-span steel truss continuous bridge having initial curvature and construction method |
-
2018
- 2018-09-13 CN CN201821496301.8U patent/CN209082323U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109056496A (en) * | 2018-09-13 | 2018-12-21 | 中铁第四勘察设计院集团有限公司 | A kind of super-span steel truss continuous bridge having initial curvature and construction method |
| CN109056496B (en) * | 2018-09-13 | 2023-12-15 | 中铁第四勘察设计院集团有限公司 | Ultra-large span steel truss continuous beam bridge with initial curvature and construction method |
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