CN208501466U - A kind of mitre minor radius multitower Curved Stayed-cable Bridge - Google Patents
A kind of mitre minor radius multitower Curved Stayed-cable Bridge Download PDFInfo
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- CN208501466U CN208501466U CN201820771032.5U CN201820771032U CN208501466U CN 208501466 U CN208501466 U CN 208501466U CN 201820771032 U CN201820771032 U CN 201820771032U CN 208501466 U CN208501466 U CN 208501466U
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Abstract
The utility model relates to bridge structure technical fields, in particular to a kind of mitre minor radius multitower Curved Stayed-cable Bridge.Including end bay beam section and middle bridge section；The end bay beam section is straight line beam section, by end bay suspension cable suspension support on end bay bridge tower；The middle bridge section is to be connected the arc curve beam section of two sides bridge section, and across suspension cable suspension support is on middle bridge tower in；The middle bridge tower tower height is not higher than two sides bridge tower tower height, and middle bridge section is provided with the tension structure connecting with middle bridge tower far from the side in its center of circle.The bridge structure of the utility model is simple, easy for construction, low in cost, has good economy, and span is big, highly-safe, has great promotional value.
Description
Technical field
The utility model relates to bridge structure technical fields, in particular to a kind of mitre minor radius multitower curve oblique pull
Bridge.
Background technique
Bridge location that is larger and being curve circuit is required for span, conventional bridge type is all difficult to be applicable at present, or causes
Project cost it is higher, economy is poor.Therefore, it is necessary to a kind of novel bridge type be proposed, to adapt to above-mentioned special bridge location.In conjunction with
Above-mentioned bridge location, Curved Stayed-cable Bridge are that a kind of more mature bridge type can take curve multi pylon cable stayed bridge when span requires larger
Structure type.
Firstly, for multi pylon cable stayed bridge, common problem is that middle tower rigidity is lower.At present in design multitower oblique pull
In bridge and solution when tower Rigidity, conventional way and existing some problems are as follows:
(1) for general layout, multi pylon cable stayed bridge is often designed to the form of " senior middle school's tower, low side tower ", leads to middle tower
Flexibility compared to larger, the vertical rigidity of bridge entirety is lower.Such as again on this basis by increase in tower section mode come
Tower rigidity in raising, economy are poor.
It (2) is relatively effective means by adding the oblique cable of anchoring for tower rigidity in improving.However, anchoring oblique cable
Stress fatigue problem is than more prominent.Also, when side tower lower king-post strut is higher or when load is larger, the lower king-post strut of side tower will be located
In unfavorable stress.Meanwhile to the middle tower of Curved Stayed-cable Bridge using oblique cable is anchored, it will lead to middle tower and bear biggish transverse direction not
Sharp load.
Secondly, for Curved Stayed-cable Bridge, the unfavorable stress of the transverse direction of middle tower, the torsion of girder, Middle span closing etc. problem
It is more prominent, it is the key factor of controlling curve Design of Cable-Stayed Bridge.
To sum up, in conjunction with multi pylon cable stayed bridge and the technical characterstic and difficult point of Curved Stayed-cable Bridge, how effective solution curve is more
The technical issues of pylon cable-stayed bridge is good problem to study.
Summary of the invention
The purpose of this utility model seek to solve the normal mode mentioned in above-mentioned background technique Curved Stayed-cable Bridge and
A series of problems existing for multi pylon cable stayed bridge, providing a kind of can effectively solve the problem that middle tower rigidity, the unfavorable stress of transverse direction of middle tower, master
The multitower Curved Stayed-cable Bridge of the problems such as torsion of beam, Middle span closing.
A kind of the technical solution of the utility model are as follows: mitre minor radius multitower Curved Stayed-cable Bridge, it is characterised in that: including
End bay beam section and middle bridge section；The end bay beam section is straight line beam section, by end bay suspension cable suspension support in end bay bridge tower
On；The middle bridge section is to be connected the horizontal arc camber beam section of two sides bridge section, across the suspension cable suspension support in
In on middle bridge tower；The middle bridge tower tower height be not higher than two sides bridge tower tower height, middle bridge section far from its center of circle one
Side is provided with the tension structure connecting with middle bridge tower.
The further tension structure includes ground anchor foundation；The earth anchor basis be located at middle bridge section far from across
Beam section center of circle side；Ground anchor rope is disposed on the basis of the earth anchor；The ground anchor rope anchoring lower ends are in ground anchor foundation
On, upper end is anchored at the tower top position of middle bridge tower.
The further ground anchor foundation is on the extended line of middle bridge tower and middle bridge section circle center line connecting.
The further middle bridge tower is in middle bridge tower to the intersection point of the center line of the end bay beam section of two sides along bridge
On the extended line of middle bridge section circle center line connecting.
The further middle bridge tower is in earth anchor basis to the intersection point of the center line of the end bay beam section of two sides along bridge
Between middle bridge tower.
More ground anchor ropes are disposed between the ground anchor foundation and middle bridge tower, under more ground anchor ropes
End is anchored on the basis of earth anchor, and equidistant interval is anchored at middle bridge tower direction across bridge side along the vertical direction for upper end.
The middle bridge tower is brilliant bridge tower, including lower end be fixed on two king-posts on cushion cap and
Crossbeam between two king-posts；The crossbeam is arranged along horizontal direction across bridge；The centre portion branch of the middle bridge section
It holds on crossbeam, and the center of middle bridge section is not overlapped in the vertical direction with crossbeam center；The crossbeam center, which is located at, opens
Between pull-up structure and middle bridge section center.
The center and crossbeam center of the further middle bridge section are spaced 1~1.5m on direction across bridge direction.It is practical
On, the center of middle bridge section is spaced the tower foundation stress on direction across bridge direction with crossbeam center and is specifically calculated.
The further middle bridge section and end bay beam section are combined bridge beam section, the upper bridge of middle bridge section
Face is the superelevation highway bridge being in tilted layout, and the upper bridge floor of the end bay beam section is highway bridge.
The upper bridge floor of the further middle bridge section includes multiple unit bridge floors along direction across bridge arrangement；The list
Position bridge floor is higher than the unit bridge floor close to the side in the middle bridge section center of circle far from the side in the middle bridge section center of circle.
The further unit bridge floor is higher than the unit bridge floor close to middle bridge far from the side in the middle bridge section center of circle
30~50cm of side of Duan Yuanxin.In fact, height difference is true according to girder sweep and design speed inside and outside unit bridge floor
It is fixed.
Be disposed on the middle bridge tower it is two rows of along direction across bridge it is spaced apart in across suspension cable, Liang Paizhong
It is anchored at the direction across bridge two sides of middle bridge section respectively across suspension cable.
The advantages of the utility model, has: 1, proposing a kind of structure type of multitower Curved Stayed-cable Bridge, be the special bridge in part
The design of position bridge provides a kind of reference of new structure.It may be selected other than the bridge axle line in conditional place setting
Pier is avoided and is crossed over across direct greatly using one, and bridge span reduces half, greatly reduces project cost.
2, the general layout form for using " flash tower, Di Zhongta " in multi pylon cable stayed bridge for the first time effectively alleviates often
Advise the middle tower rigidity problem on the weak side of multi pylon cable stayed bridge, by a relatively large margin improve bridge totality vertical rigidity；For multitower song
Line cable-stayed bridge, middle tower bears the biggish transversely eccentered active force of suspension cable, using the form of " flash tower, Di Zhongta ", Neng Gouyou
The unfavorable stress of transverse direction of tower in effect reduction.
3, for the middle tower of multitower Curved Stayed-cable Bridge, due to bearing in biggish face simultaneously and out-of-plane load, the drawing of middle tower
Stress level is higher, and is difficult to adjust control, using the material forms of head tower, can effectively overcome middle tower tensile stress biggish
Problem；By appropriate increasing section size, it on the one hand can reduce the stress level of middle tower and improve stability, another aspect energy
The rigidity of middle tower is enough effectively improved, to improve bridge totality vertical rigidity.
4, the middle tower of multitower Curved Stayed-cable Bridge is transversely eccentered to the setting of girder plane curve center of circle side, it can reduce middle tower
The unfavorable stress of transverse direction on basis, while can reduce the axle power difference of two sides king-post, so that middle tower uniform force is reasonable.
5, when girder plane curve radius is smaller or middle tower and its basis it is lateral stressed larger when, middle tower can be increased
If laterally anchor cable, the transversely eccentered active force of suspension cable is balanced by way of active tensioning, thus reduce in tower cross
To stress, structure stress is made to tend to be reasonable.
6, auxiliary pier is set in the end bay of multitower Curved Stayed-cable Bridge, can be improved bridge totality vertical rigidity.
7, it takes two pairs to be anchored at the same node part pygochord, stronger horizontal restraint can be provided for side tower, from
And improve bridge totality vertical rigidity.
It 8, is the torque for reducing girder, the two sides stay cable force under reasonable finished dead state is designed to different rope force value.
9, continuous steel-concrete composite beam bridge face is used to realize the effect of ballast, has saved material utilization amount, and economic benefit is good.
10, a kind of beam structure form of And of Varying Depth is used for the first time, it is simple for structure to meet the superelevation design of bridge floor, by
Power is reasonable, can reduce steel using amount, and the setting of bridge floor superelevation is flexible.
11, the present invention in closure mouth setting laterally to drag-line, and reduces stay cable force in Middle span closing construction,
To reduce the lateral deviation of closure mouth, to realize the requirement of unstress state closure.
12, it for bridge type, requires larger for span and under equal conditions works as use for the bridge location of curve circuit
When suspension bridge scheme one is across crossing over, project cost is more much higher than the multitower Curved Stayed-cable Bridge scheme, the multitower curve oblique pull
Bridge can save 25% cost；
13, the multitower Curved Stayed-cable Bridge terrain adaptability is strong, requires bridge that is larger and being curve circuit especially for span
Position, can overcome disadvantage present in conventional bridge type, provide a kind of completely new longspan structure shape for the design of special bridge location
Formula reference；
14, the multitower Curved Stayed-cable Bridge has good aesthetic effect, and structure is merrily and lightheartedly soft and graceful, can ideally with ring around
Border combines, and provides a new landscape theory for the design of Urban Bridge and landscape bridge, and social benefit is significant；
15, the multitower Curved Stayed-cable Bridge dexterously solves the problems, such as rigidity and stress by a series of measures, structure by
Power reasonable benefit/risk, economic benefit is good, is a kind of bridge type that should be widely promoted.
The bridge structure of the utility model is simple, easy for construction, low in cost, has a good economy, and span it is big,
It is highly-safe, there is great promotional value.
Detailed description of the invention
Fig. 1: the main view of the cable-stayed bridge of the utility model；
Fig. 2: the top view of the cable-stayed bridge of the utility model；
Fig. 3: the middle bridge tower of the utility model and middle bridge section arragement construction schematic diagram；
Fig. 4: the middle bridge segment structure schematic diagram of the utility model；
Fig. 5: the end bay beam section structural schematic diagram of the utility model；
Wherein: 1-end bay beam section；2-middle bridge sections；3-end bay suspension cables；4-end bay bridge towers；Across suspension cable in 5-；
6-middle bridge towers；6.1-cushion caps；6.2-king-posts；6.3-crossbeams；7-ground anchor foundations；8-ground anchor ropes；9-unit bridges
Face.
Specific embodiment
The utility model is described in further detail in the following with reference to the drawings and specific embodiments.
The cable-stayed bridge of the present embodiment is the big curve bridge of span, as shown in Fig. 1~2, including end bay beam section 1 and middle bridge
Section 2, end bay beam section 1 are straight line beam section, and by 3 suspension support of end bay suspension cable on end bay bridge tower 1, middle bridge section 2 is linking
The horizontal arc camber beam section of two sides bridge section 1, across 5 suspension support of suspension cable on middle bridge tower 6 in, middle bridge tower
Be disposed on 6 it is two rows of along direction across bridge it is spaced apart in across suspension cable 5, be anchored at middle bridge section 2 respectively across suspension cable 5 in two rows
Direction across bridge two sides can be set in the two sides under reasonable finished dead state across 5 Suo Li of suspension cable for the torque of bridge section 2 in reducing
Count into different rope force value.Multispan can be set in the end bay beam section 1 of the present embodiment, is considered according to actual landform.The present embodiment is logical
It crosses all bending sections for crossing over entire bridge to concentrate in middle bridge section 2, by reducing the height of bridge tower 6, forms " flash
The general layout form of tower, low middle tower ", so as to shorten the curved section beam body length of middle tower carrying, and then it is integrally rigid to improve bridge
The unfavorable stress of transverse direction of tower in degree and reduction.
As shown in Figure 1, the middle bridge section 2 of the present embodiment is shorter than end bay beam section 1, it is accordingly used in carrying in bridge section 2
The tower height of bridge tower 6 is not higher than the end bay bridge tower 4 for carrying end bay beam section 1.As shown in figure 3, the middle bridge tower 6 of the present embodiment
For brilliant bridge tower, two king-posts 6.2 and the cross between two king-posts 6.2 being fixed on cushion cap 6.1 including lower end
Beam 6.3, crossbeam 6.3 arrange that the centre portion of middle bridge section 2 is supported on crossbeam 6.3, and middle bridge section 2 along horizontal direction across bridge
Center be not overlapped in the vertical direction with 6.3 center of crossbeam.
By the way that eccentric structure is arranged, the unfavorable stress of transverse direction on the basis of middle bridge tower 6 can reduce, while can reduce two
The axle power difference of side king-post 6.2, so that the uniform force of middle bridge tower 6 is reasonable.
In order to further decrease the direction across bridge stress of middle bridge tower 6, the present embodiment middle bridge section 2 far from its center of circle one
Side is provided with the tension structure connecting with middle bridge tower 6.Tension structure includes being located at middle bridge section 2 far from middle 2 center of circle of bridge section
The ground anchor foundation 7 of side is disposed with ground anchor rope 8 in ground anchor foundation 7,8 anchoring lower ends of ground anchor rope in ground anchor foundation 7, on
End is anchored at the tower top position of middle bridge tower 6.Ground anchor foundation 7 is in the extended line of middle bridge tower 6 and middle 2 circle center line connecting of bridge section
On.More ground anchor ropes 8 are disposed between ground anchor foundation 7 and middle bridge tower 2, more ground 8 anchoring lower ends of anchor rope are in ground anchorage
On plinth 7, equidistant interval is anchored at middle 6 direction across bridge side of bridge tower along the vertical direction for upper end.With flat by way of active tensioning
Across the transversely eccentered active force of suspension cable 5 in weighing apparatus, thus in reducing bridge tower 2 it is lateral stressed, so that structure stress is tended to be reasonable.
The curve bridge of the present embodiment can be set to the symmetrical bridge centered on middle bridge tower 6, also can be set into
Dissymmetrical structure.Middle bridge tower 6 is in middle bridge tower 6 and middle bridge to the intersection point of the center line of the end bay beam section 1 of two sides along bridge
On the extended line of 2 circle center line connectings of section, middle bridge tower 6 is in earth anchor base to the intersection point of the center line of the end bay beam section 1 of two sides along bridge
Between plinth and middle bridge tower 6.
As shown in Figures 4 and 5, middle bridge section 2 and end bay beam section 1 are combined bridge beam section, and end bay beam section 1 can be with
The mode combined using steel reinforced concrete, had not only realized the effect of ballast, but also saved material utilization amount, economic benefit is good.Middle bridge section 2
Upper bridge floor is the superelevation highway bridge being in tilted layout, and the upper bridge floor of end bay beam section 1 is highway bridge.The upper bridge floor of middle bridge section 2
Including multiple unit bridge floors 9 along direction across bridge arrangement, unit bridge floor 9 is higher than the unit bridge far from the side in middle 2 center of circle of bridge section
Side of the face 9 close to middle 2 center of circle of bridge section.
In the present embodiment, auxiliary pier can be set in end bay beam section 1, can be improved bridge totality vertical rigidity, by portion
It is divided to end bay suspension cable 3 to take two pairs to be anchored at the same node, stronger horizontal restraint can be provided for end bay bridge tower 4, thus
Improve bridge totality vertical rigidity.
The present embodiment in closing construction, end bay beam section 1 and middle bridge section 2 in the settable transverse direction in junction to drag-line, and
And stay cable force of the suitable bridge to two sides is reduced, so that the lateral deviation of closure mouth is reduced, to realize unstress state closure
It is required that.
Under equal conditions, when using suspension bridge scheme one across crossing over, curve of the project cost than the present embodiment
Cable-stayed Bridge Scheme is much higher, and the cable-stayed bridge of the present embodiment can save 25% cost.
Basic principles, main features, and advantages of the present invention has been shown and described above.Current row
The technical staff of industry is described in above embodiments and description it should be appreciated that the present utility model is not limited to the above embodiments
Only illustrate the principles of the present invention, the utility model can also on the premise of not departing from the spirit and scope of the utility model
There are various changes and modifications, these various changes and improvements fall within the scope of the claimed invention.The utility model is wanted
Protection scope is asked to be defined by appended claims and its equivalent.
Claims (10)
1. a kind of mitre minor radius multitower Curved Stayed-cable Bridge, it is characterised in that: including end bay beam section (1) and middle bridge section (2)；
The end bay beam section (1) is straight line beam section, by end bay suspension cable (3) suspension support on end bay bridge tower (4)；In described
Bridge section (2) be connected two sides bridge section (1) horizontal arc camber beam section, in across suspension cable (5) suspension support in
On middle bridge tower (6)；Middle bridge tower (6) tower height is not higher than two sides bridge tower (4) tower height, and middle bridge section (2) is separate
The side in its center of circle is provided with the tension structure connecting with middle bridge tower (6).
2. a kind of mitre minor radius multitower Curved Stayed-cable Bridge as described in claim 1, it is characterised in that: the tensioning knot
Structure includes ground anchor foundation (7)；The ground anchor foundation (7) is located at middle bridge section (2) far from middle bridge section (2) center of circle side；Institute
Ground anchor rope (8) is disposed in the ground anchor foundation (7) stated；Ground anchor rope (8) anchoring lower ends on ground anchor foundation (7),
Upper end is anchored at the tower top position of middle bridge tower (6).
3. a kind of mitre minor radius multitower Curved Stayed-cable Bridge as claimed in claim 2, it is characterised in that: the ground anchorage
Plinth (7) is on the extended line of middle bridge tower (6) and middle bridge section (2) circle center line connecting.
4. a kind of mitre minor radius multitower Curved Stayed-cable Bridge as claimed in claim 3, it is characterised in that: the middle bridge
Tower (6) is in middle bridge tower (6) to the intersection point of the center line of the end bay beam section (1) of two sides along bridge and middle bridge section (2) center of circle connects
On the extended line of line.
5. a kind of mitre minor radius multitower Curved Stayed-cable Bridge as claimed in claim 4, it is characterised in that: the middle bridge
Tower (6) is between earth anchor basis and middle bridge tower (6) along bridge to the intersection point of the center line of the end bay beam section (1) of two sides.
6. a kind of mitre minor radius multitower Curved Stayed-cable Bridge as described in claim 3~5 is any, it is characterised in that: described
Ground anchor foundation (7) and middle bridge tower (6) between be disposed with more ground anchor ropes (8), more ground anchor rope (8) anchoring lower ends exist
In ground anchor foundation (7), equidistant interval is anchored at middle bridge tower (6) direction across bridge side along the vertical direction for upper end.
7. a kind of mitre minor radius multitower Curved Stayed-cable Bridge as described in claim 1, it is characterised in that: the middle bridge
Tower (6) is brilliant bridge tower, is fixed on two king-posts (6.2) on cushion cap (6.1) including lower end and is located at two king-posts
(6.2) crossbeam (6.3) between；The crossbeam (6.3) is arranged along horizontal direction across bridge；The centre of the middle bridge section (2)
Section is supported on crossbeam (6.3), and the center of middle bridge section (2) is not overlapped in the vertical direction with crossbeam (6.3) center；Institute
Crossbeam (6.3) center stated is located between tension structure and middle bridge section (2) center.
8. a kind of mitre minor radius multitower Curved Stayed-cable Bridge as described in claim 1, it is characterised in that: the middle bridge
Section (2) and end bay beam section (1) are combined bridge beam section, and the upper bridge floor of middle bridge section (2) is the superelevation being in tilted layout
Highway bridge, the upper bridge floor of the end bay beam section (1) are highway bridge.
9. a kind of mitre minor radius multitower Curved Stayed-cable Bridge as claimed in claim 8, it is characterised in that: the middle bridge
The upper bridge floor of section (2) includes multiple unit bridge floors (9) along direction across bridge arrangement；The unit bridge floor (9) is far from middle bridge section
(2) side in the center of circle is higher than the unit bridge floor (9) close to the side in middle bridge section (2) center of circle.
10. a kind of mitre minor radius multitower Curved Stayed-cable Bridge as described in claim 1, it is characterised in that: in described across
Be disposed on bridge tower (6) it is two rows of along direction across bridge it is spaced apart in across suspension cable (5), anchored respectively in two rows across suspension cable (5)
In the direction across bridge two sides of middle bridge section (2).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820771032.5U CN208501466U (en) | 2018-05-23 | 2018-05-23 | A kind of mitre minor radius multitower Curved Stayed-cable Bridge |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820771032.5U CN208501466U (en) | 2018-05-23 | 2018-05-23 | A kind of mitre minor radius multitower Curved Stayed-cable Bridge |
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| CN208501466U true CN208501466U (en) | 2019-02-15 |
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| CN201820771032.5U Active CN208501466U (en) | 2018-05-23 | 2018-05-23 | A kind of mitre minor radius multitower Curved Stayed-cable Bridge |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108505428A (en) * | 2018-05-23 | 2018-09-07 | 中铁第四勘察设计院集团有限公司 | A kind of mitre minor radius multitower Curved Stayed-cable Bridge |
-
2018
- 2018-05-23 CN CN201820771032.5U patent/CN208501466U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108505428A (en) * | 2018-05-23 | 2018-09-07 | 中铁第四勘察设计院集团有限公司 | A kind of mitre minor radius multitower Curved Stayed-cable Bridge |
| CN108505428B (en) * | 2018-05-23 | 2023-12-19 | 中铁第四勘察设计院集团有限公司 | Large-included-angle small-radius multi-tower curve cable-stayed bridge |
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