CN106884371B - A kind of non-uniform beam and suspension cable combined bridge structural system - Google Patents
A kind of non-uniform beam and suspension cable combined bridge structural system Download PDFInfo
- Publication number
- CN106884371B CN106884371B CN201710273900.7A CN201710273900A CN106884371B CN 106884371 B CN106884371 B CN 106884371B CN 201710273900 A CN201710273900 A CN 201710273900A CN 106884371 B CN106884371 B CN 106884371B
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- bridge
- suspension cable
- section girder
- suspension
- towing rope
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Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D11/00—Suspension or cable-stayed bridges
- E01D11/02—Suspension bridges
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/14—Towers; Anchors ; Connection of cables to bridge parts; Saddle supports
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/16—Suspension cables; Cable clamps for suspension cables ; Pre- or post-stressed cables
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2/00—Bridges characterised by the cross-section of their bearing spanning structure
Abstract
The present invention discloses a kind of non-uniform beam and suspension cable combined bridge structural system, it is characterized in that：Bridge is the setting variable cross-section girder on the bridge pier of both ends, and between the variable cross-section girder of both ends, uiform section girder is set in the middle part of main span；Low clearance bridge tower beam is set in the pier top of variable cross-section girder, saddle is set on tower top on low clearance bridge tower, suspension cable main push-towing rope is set up using saddle and both ends anchor structure, in the stage casing of suspension cable main push-towing rope, suspension rod is set, uiform section girder is sling by suspension rod, Cable system is formed by saddle, suspension cable main push-towing rope and suspension rod, realizes large span main span.Bridge reasonable stress of the present invention, economy, difficulty of construction are low, handsome in appearance, can be applied to all kinds of 500m across footpath bridges of cross a river or cross-line main span 150.
Description
Technical field
The present invention relates to the design of the bridge of main span 150~500m across footpaths.
Background technology
Nonprismatic continuous beam or continuous rigid frame bridge are the winner of Bridge type scheme comparison in 50-120m spans, but as master
When across footpath further increases, it is easy to the problems such as diseases such as middle span deflexion, cracking in webs occur, and Bridges are simple, bridge
Landscape effect is general.
Suspension bridge span ability is big, and the bridge of super more than 1000m across footpaths is substantially suspension bridge, and Bridges are attractive in appearance,
In recent years favored by urban district Urban Bridge conceptual design, but girder of suspension bridge uses steel box girder more；Girder steel box-girder, main push-towing rope
High tensile steel wire and the casting of large scale saddle are costly；Guide cable crosses the river difficulty；Main push-towing rope and hanger erection need to arrange that cat road etc. faces
When facility, working measure is expensive, and Construction control difficulty is big.Although suspended-cable structure is handsome in appearance, due to cost, difficulty of construction
Etc. factor, in Medium Span bridge, the not popularization and application of Suspension bridge structure bridge.
The content of the invention
The present invention avoids the above-mentioned bridge weak points of 150~500m of main span, its comprehensive advantage, there is provided Yi Zhongbian
Cut section bar and suspension cable combined bridge structural system, provided for Bridge Design in the range of 150~500m across footpaths a kind of more competitive
Bridge structure form.
The present invention adopts the following technical scheme that to solve technical problem：
Non-uniform beam of the present invention is with the characteristics of suspension cable combined bridge structural system：The bridge is at both ends
Variable cross-section girder is set on bridge pier, between the variable cross-section girder of both ends, uiform section girder is set in the middle part of main span；In the change
Bridge tower is set in the pier top of section girder, saddle is set on the tower top on the bridge tower, utilizes the saddle and both ends anchor
Fixing structure sets up suspension cable main push-towing rope, sets suspension rod in the stage casing of the suspension cable main push-towing rope, the uiform section girder is sling by suspension rod, by institute
State saddle, suspension cable main push-towing rope and suspension rod and form Cable system, realize large span main span.
Non-uniform beam of the present invention is lain also in the characteristics of suspension cable combined bridge structural system：The structure of the variable cross-section girder
It is provided for undertaking itself dead load and mobile load, does not consider the load of span centre portion uiform section girder.
Non-uniform beam of the present invention is lain also in the characteristics of suspension cable combined bridge structural system：Both ends anchorage and Cable system
The dead load and mobile load for only considering uiform section girder are set.
Non-uniform beam of the present invention is lain also in the characteristics of suspension cable combined bridge structural system：The uiform section girder and both ends
Variable cross-section girder uses and is rigidly connected or is articulated and connected.
Non-uniform beam of the present invention is lain also in the characteristics of suspension cable combined bridge structural system：The height of the low clearance bridge tower
1/6~1/8 bridge main is taken as across across footpath.
Non-uniform beam of the present invention is lain also in the characteristics of suspension cable combined bridge structural system：The suspension cable main push-towing rope is twisted using steel
Line or parallel steel wire composition strand；The both ends anchor structure of the suspension cable main push-towing rope is to be anchored in using ground anchor type in the anchorage of both ends,
Or be anchored in for self-anchored type in bridge main beam, the suspension rod is connected by cord clip with suspension cable main push-towing rope.
Non-uniform beam of the present invention is lain also in the characteristics of suspension cable combined bridge structural system：The erection of the suspension cable main push-towing rope is
To use the variable cross-section girder that Hanging Basket cantilever completes construction to install each strand of suspension cable main push-towing rope by root as platform.
Compared with the prior art, the present invention has the beneficial effect that：
1st, the present invention makes full use of concrete And of Varying Depth beam root depth of beam big, bending resistance, the big advantage of shear stiffness, plays mixed
Xtah Crude Clay structure section advantage, and utilize concrete variable cross-section beam economic advantages；Using the suspension cable main push-towing rope with compared with high-tensile
With suspension rod form Cable system undertake middle part uiform section girder deadweight, effectively reduce span centre beam section due to apart from bridge pier away from
From it is big, the arm of force is big, moment of flexure is big and causes girder pier top stress larger, evade beams of concrete span ability it is limited, it is easy occur across
In under around, rift defect, increase bridge span.
3rd, centre suspension cord system of the present invention only assume responsibility for the load of span centre part beam section, and bridge tower is highly small, its suspension cable main push-towing rope,
The material property and dimensions of saddle and anchor system are small compared with same span routine suspension bridge；Suspension cable main push-towing rope and suspension rod can
Using conventional steel strand wires material, suspension cable main push-towing rope and saddle specification are small, and manufacture difficulty is small, have effectively evaded conventional main rope of suspension bridge system
The defects of cost of uniting is high.
4th, in the present invention bridge tower and main push-towing rope system construction, it is flat for construction using the variable cross-section girder for having completed construction
Platform, the interim cat road construction system of conventional suspension bridge is evaded, has substantially reduced construction cost, reduces difficulty of construction.
5th, Bridge structural system reasonable stress of the present invention, it is excellent that variable cross-section beam bridge, suspension bridge bridge appearance moulding are combined
Gesture, it is a kind of more competitive bridge alternatives of main span 150-500m across footpaths.
Brief description of the drawings
Fig. 1 is ground anchor type non-uniform beam in the present invention and suspension cable combined bridge structural system schematic diagram；
Fig. 2 is self-anchored type non-uniform beam in the present invention and suspension cable combined bridge structural system schematic diagram；
Fig. 3 is variable cross-section main beam stress sketch in the present invention；
Fig. 4 is uiform section main beam stress sketch in the middle part of main span in the present invention；
Fig. 5 a- Fig. 5 g are non-uniform beam of the present invention and suspension cable combined bridge structural system construction process figure；
Label in figure：Bridge 1 pier, 2 anchorages, 3 variable cross-section girders, 4 uiform section girders, 5 bridge towers, 6 suspension cable main push-towing ropes, 7 suspension rods, 8
Saddle.
Embodiment
Referring to Fig. 1, Fig. 2, non-uniform beam and the structure type of suspension cable combined bridge structural system are in the present embodiment：Bridge
Structural system is that variable cross-section girder 3 is set on both ends bridge pier 1, is set between both ends variable cross-section girder 3, in the middle part of main span
Uiform section girder 4；Low clearance bridge tower 5 is set in the pier top of variable cross-section girder 3, saddle is set on the tower top of low clearance bridge tower 5
Seat 8, suspension cable main push-towing rope 6 is set using saddle 8 and both ends anchor structure, and suspension rod 7, uiform section master are set in the stage casing of suspension cable main push-towing rope 6
Beam 4 is sling by suspension rod 7, is formed Cable system by saddle 8, suspension cable main push-towing rope 6 and suspension rod 7, is realized large span main span.
For the structure type of non-uniform beam in the present embodiment and suspension cable combined bridge structural system, its variable cross-section girder by
Power is as shown in figure 3, uiform section main beam stress is as shown in figure 4, reasonable stress, economy, difficulty of construction be small, the Beauty in the middle part of its main span
See, can be applied to all kinds of cross a river or cross-line main span 150-500m across footpath bridges.In Fig. 3 and Fig. 4, F1 is transition pier counter-force, and F2 is
Main pier counter-force, F3 are side steeve tension, and F4 is tension of main cable, and F5 is steeve tension, and F6 is king-post support force.
In specific implementation, corresponding structure setting also includes：
The structure setting of variable cross-section girder 3 predominantly undertakes dead load and mobile load in own range, does not consider that span centre portion etc. is cut
The load of face girder 4, its design refers to uprise section continuous beam or T-shaped just structure determines root deck-molding, section and prestressing force arrangement.
The setting of both ends anchorage 2 and Cable system only considers the dead load and mobile load of uiform section girder 4, waits and cuts in the middle part of main span
Dead load and mobile load are mainly transferred to suspension cable main push-towing rope 6 by suspension rod 7 in the own range of face girder 4, and then are transferred to bridge tower and anchor
Heavy stone used as an anchor；The design of uiform section girder and funicular system in the middle part of main span, can be according to the outstanding of the span for only considering middle part uiform section girder
Cable bridge carries out relevant design.Middle part uiform section girder is undertaken by funicular system, reduces transmission of its load to variable cross-section girder section.
Uiform section girder 4 uses with both ends variable cross-section girder 3 and is rigidly connected or is articulated and connected, uiform section girder and variable cross-section
Axle power is mainly transmitted in girder joint, and shears smaller with moment of flexure.
The height of bridge tower 5 is taken as 1/8~1/10 bridge main across across footpath；Suspension cable main push-towing rope 6 uses galvanized strand wires or epoxy
Steel strand wires, or strand is formed with parallel zinc-coated wire；Because suspension cable main push-towing rope 6 only undertakes the load of uiform section girder 4 so that
The load that suspension cable main push-towing rope 6 is undertaken is relatively small, thus its section specification is relatively small；Simultaneously as suspension cable main push-towing rope
Specification is relatively small, and the saddle in Cable system is also smaller.
Because the specification of suspension cable main push-towing rope 6 is relatively small, suspension cable main push-towing rope can use Zheng Shu factories to make, whole main push-towing rope integral hoisting
Installation, set up to have completed the variable cross-section girder 3 of construction as platform, it is not necessary to which conventional suspension bridge construction scene Strand Erection faces
When facility, that is, do not need cat road facility.
The both ends anchor structure of suspension cable main push-towing rope 6 can be anchored in anchorage 2 using ground anchor type as shown in Figure 1, or is adopted
It is anchored in self-anchored type as shown in Figure 2 in bridge main beam, suspension rod 7 is connected by cord clip with suspension cable main push-towing rope 6, for transmitting bridge
Load, suspension rod are in the range of uiform section girder.
The present invention combines the stress advantage of variable cross-section concrete beam bridge and suspension bridge, and its variable cross-section main beam profile is excellent
U.S., it is thick and heavy not lose merrily and lightheartedly；Main push-towing rope is unfolded naturally, is had a graceful figure, suspension cable main push-towing rope and suspension rod aligned orderly, and curve is arranged in pairs or groups with straight line,
It is easy to get integrated into environment；The sag vertical curve of the convex curve of variable cross-section girder and suspension cable main push-towing rope mutually echoes in main span, overall succinct, lucid and lively,
Show the structure lines of grace.
Construction method is carried out as follows as shown in Figure 5：
Step 1：As shown in Figure 5 a, construction bridges basis, bridge pier 1 and anchorage 2；
Step 2：As shown in Figure 5 b, constructed paragraph by paragraph by the way of Hanging Basket variable cross-section girder part, and tensioning is pre- accordingly
Stress system；
Step 3：As shown in Figure 5 c, end bay closes up, and completes the construction of variable cross-section girder 3；
Step 4：As fig 5d, construction bridge tower 5, and saddle 8 is installed；
Step 5：As depicted in fig. 5e, it is platform with variable cross-section girder 3, sets up suspension cable main push-towing rope 6, the end anchor of suspension cable main push-towing rope 6
It is fixed in anchorage and realizes earth anchor；
Step 6：As shown in figure 5f, uiform section girder 4 in the middle part of lifting construction main span, uiform section girder 4 is steel main longitudinal grider, and
Piecemeal erection suspension rod 7 simultaneously；
Step 7：As shown in fig. 5g, mid-span main longitudinal grider closes up, and installs crossbeam and bridge deck, completes non-uniform beam and suspension cable group
Close the construction of bridge structure.
Claims (6)
1. a kind of non-uniform beam and suspension cable combined bridge structural system, it is characterized in that：The bridge is in both ends bridge
Variable cross-section girder (3) is set on pier (1), between both ends variable cross-section girder (3), uiform section girder is set in the middle part of main span
(4)；Bridge tower (5) is set in the pier top of the variable cross-section girder (3), saddle (8) is set on the tower top of the bridge tower (5),
Suspension cable main push-towing rope (6) is set up using the saddle (8) and both ends anchor structure, sets and hangs in the stage casing of the suspension cable main push-towing rope (6)
Bar (7), the uiform section girder (4) are sling by suspension rod (7), are made up of the saddle (8), suspension cable main push-towing rope (6) and suspension rod (7)
Cable system, realize large span main span；The structure setting of the variable cross-section girder (3) is used to undertake itself dead load and mobile load, no
Consider the load of span centre portion's uiform section girder (4).
2. non-uniform beam and suspension cable combined bridge structural system described in claim 1, it is characterized in that：Both ends anchorage (2) and outstanding
The setting of cable system only considers the dead load and mobile load of uiform section girder (4).
3. non-uniform beam and suspension cable combined bridge structural system described in claim 1, it is characterized in that：The uiform section girder
(4) used with both ends variable cross-section girder (3) and be rigidly connected or be articulated and connected.
4. non-uniform beam and suspension cable combined bridge structural system described in claim 1, it is characterized in that：The bridge tower (5) is low
Height bridge tower, the height of the low clearance bridge tower are taken as 1/6~1/8 bridge main across across footpath.
5. non-uniform beam and suspension cable combined bridge structural system described in claim 1, it is characterized in that：The suspension cable main push-towing rope (6)
Using steel strand wires or parallel steel wire composition strand；The both ends anchor structure of the suspension cable main push-towing rope (6) is anchored in using ground anchor type
In both ends anchorage (2), or it is that self-anchored type is anchored in bridge main beam, the suspension rod (7) is connected by cord clip and suspension cable main push-towing rope (6)
Connect.
6. non-uniform beam according to claim 1 and suspension cable combined bridge structural system, it is characterized in that：The suspension cable main push-towing rope
(6) erection is to use the variable cross-section girder (3) that Hanging Basket cantilever completes construction to install each rope of suspension cable main push-towing rope by root for platform
Stock.
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| CN201710273900.7A CN106884371B (en) | 2017-04-25 | 2017-04-25 | A kind of non-uniform beam and suspension cable combined bridge structural system |
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| CN201710273900.7A CN106884371B (en) | 2017-04-25 | 2017-04-25 | A kind of non-uniform beam and suspension cable combined bridge structural system |
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| CN106884371B true CN106884371B (en) | 2018-02-16 |
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| CN108625275B (en) * | 2018-05-09 | 2019-12-20 | 中交一公局集团有限公司 | Method for installing stiffening beam section of suspension bridge |
| CN108708266B (en) * | 2018-05-24 | 2019-09-17 | 武汉科技大学 | A kind of anchoring process of landscape suspension bridge and its decorative cable |
| CN111472285A (en) * | 2020-05-06 | 2020-07-31 | 中交二航局第四工程有限公司 | Method for mounting main bridge variable-section continuous steel truss girder by using cable crane |
| CN114541283A (en) * | 2022-01-18 | 2022-05-27 | 山东省交通规划设计院集团有限公司 | Structure and method for solving continuous downwarping problem of large-span PC beam bridge |
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| NO319800B1 (en) * | 2003-10-14 | 2005-09-19 | Aas Jakobsen As | Bridge construction comprising a serial combination of a sloping drawbridge and a suspension bridge |
| CN201826249U (en) * | 2009-11-27 | 2011-05-11 | 大连理工大学 | Self-anchored hybrid beam cable-stayed suspension cooperative system bridge |
| CN101914897B (en) * | 2010-07-30 | 2011-08-31 | 中铁四局集团有限公司 | Construction method of single main cable inclined-suspender earth anchored suspension bridge |
| CN104264577A (en) * | 2014-10-21 | 2015-01-07 | 天津市市政工程设计研究院 | Self-anchoring suspension cable and stay cable cooperative system bridge with girder having variable cross-section |
| CN104452569B (en) * | 2014-11-24 | 2016-03-30 | 王汉席 | A kind of Long span prestressed concrete beam bridge cloth Shu Fangfa |
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Inventor after: Yin Yonggao Inventor after: Ding Wei Inventor after: Cao Hao Inventor after: Li Shaohua Inventor after: Hu Ke Inventor after: Qian Dongsheng Inventor after: Huang Xuewen Inventor after: Zhang Zheng Inventor after: Duan Haipeng Inventor after: Wu Zhigang Inventor after: Mei Yinghua Inventor after: Lu Yuangang Inventor before: Yin Yonggao Inventor before: Li Shaohua Inventor before: Hu Ke Inventor before: Zhang Zheng Inventor before: Duan Haipeng Inventor before: Wu Zhigang Inventor before: Mei Yinghua Inventor before: Lu Yuangang Inventor before: Ding Wei Inventor before: Cao Hao |
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