CN104612032B - Big across tilting arch bridge pylon cable-stayed bridge - Google Patents

Big across tilting arch bridge pylon cable-stayed bridge Download PDF

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Publication number
CN104612032B
CN104612032B CN201410784799.8A CN201410784799A CN104612032B CN 104612032 B CN104612032 B CN 104612032B CN 201410784799 A CN201410784799 A CN 201410784799A CN 104612032 B CN104612032 B CN 104612032B
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China
Prior art keywords
bridge
supporting leg
span
arch
long
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CN201410784799.8A
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Chinese (zh)
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CN104612032A (en
Inventor
罗世东
王新国
张晓江
杨勇
张治华
周继
黎曙文
赵剑锋
史娣
柳鸣
陈泽宇
明发焱
罗春林
崔苗苗
谢晓慧
李的平
李桂林
董春燕
陈名欢
陈晓辉
严定国
张�杰
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中铁第四勘察设计院集团有限公司
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Publication of CN104612032A publication Critical patent/CN104612032A/en
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    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01DCONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D11/00Suspension or cable-stayed bridges
    • E01D11/04Cable-stayed bridges
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01DCONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D19/00Structural or constructional details of bridges
    • E01D19/14Towers; Anchors ; Connection of cables to bridge parts; Saddle supports

Abstract

Disclosed by the invention big across tilting arch bridge pylon cable-stayed bridge, including multiple skew cables, long-span cablestayed bridges trend curve bridge tower, first foundation, the second basis and the 3rd basis; Bridge tower is made up of upper cantilever arm and bottom support bracket, and upper cantilever arm tilts to span centre; Bottom support bracket includes the first supporting leg, the second supporting leg, the 3rd supporting leg, and being is rigidly connected lays respectively at first foundation, on the second basis and the 3rd basis; Cross-brace beam it is provided with between first supporting leg and the second supporting leg; The top of every skew cables is longitudinally individually fixed in the 3rd arch on the side of span centre, and bottom is longitudinally individually fixed on the span centre position of bridge; Bridge tower back is provided with dorsal funciculus; Dorsal funciculus top is fixed on the top of the upper cantilever arm of bridge tower, and the bottom of dorsal funciculus is on the 3rd supporting leg being fixed in bridge tower. The present invention effectively reduces height and the cost of cable-stayed bridge, handsome in appearance, and Stability Analysis of Structures on the whole meets the demand of height limiting zone.

Description

Big across tilting arch bridge pylon cable-stayed bridge
Technical field
The present invention relates to Design of Cable-Stayed Bridge technical field, be specifically related to big across tilting arch bridge pylon cable-stayed bridge.
Background technology
Cable-stayed bridge is the design of a kind of relative maturity, but, for more than 500 meters large span stayed-cable bridges, its structural design is comparatively single. Large span stayed-cable bridge king-tower turriform common at present is H-shaped, diamond, A shape, Y shape or only cylindricality isoline tower. Referring to the turriform data of ten long span stayed-cable bridges before the following world:
Russia's island bridge, the country one belongs to: Russia, the built time: 2012, main span: 1104 meters, tower height: 320.9 meters, turriform: A shape;
Su-Tong Brideg, the country one belongs to: China, the built time: 2008, main span: 1088 meters, tower height: 306 meters, turriform: Y shape;
AngChuan Zhou bridge, the country one belongs to: Hong-Kong, the built time: 2007, main span: 1018, tower height: 296 meters, turriform: solely cylindricality;
East, Hubei Province bridge, the country one belongs to: China, the built time: 2010, main span: 926 meters, tower height: 242.5 meters, turriform: diamond;
The more Luo Qiao, the country one belongs to: Japan, the built time: 1998, main span: 890 meters, tower height: 224.0 meters, turriform: diamond;
Normandy bridge, the country one belongs to: France, the built time: 1998, main span: 856 meters, tower height: 202.7 meters, turriform: Y shape;
Jing Yue bridge, the country one belongs to: China, the built time: 2010, main span: 816 meters, tower height: 265.5 meters, turriform: H-shaped;
Jinsen bridge, the country one belongs to: Korea S, the built time: 2009, main span: 800 meters, tower height: 238 meters, turriform: Y shape;
Golden Horn bridge, the country one belongs to: Russia, the built time: 2012, main span: 737 meters, tower height: 226.25 meters, turriform: V-arrangement;
Shanghai bridge, the country one belongs to: China, the built time: 2009, main span: 730 meters, tower height 216.3 meters, turriform: herringbone.
Although above-mentioned linear type cable-stayed bridge meets cable-stayed bridge stress balance ultimate principle, but requires high area at view, the dullness that this type bridge shows, landscape effect is limited. Simultaneously at some height limiting zone, owing to common linear bridge tower cannot meet force request, people have to abandon this economy feasible scheme of cable-stayed bridge, and take other bridge types.
Fast development along with national economy, Bridge Design is required more and more higher by people, rise to the requirement to view from simple communication function, therefore need badly at present a kind of be applicable to big across cable-stayed bridge system, on the basis meeting bridge force-bearing, adopt totally new kind of stress system and external form form, build now, to meet, the requirement that owner is higher to bridge height and bridge appearance.
Summary of the invention
The main purpose of the present invention is to solve the deficiency that above-mentioned background technology exists, proposition can effectively reduce height and cost, meet the big across tilting arch bridge pylon cable-stayed bridge of bridge force-bearing situation so that it is be particularly well-suited to be used at height limiting zone or view requirement high field.
For achieving the above object, the present invention proposes a kind of big across tilting arch bridge pylon cable-stayed bridge, including long-span cablestayed bridges trend curve bridge tower, first foundation, second basis and the 3rd foundation main across, end bay, multiple skew cables, it is characterized in that: greatly inclination arch bridge pylon cable-stayed bridge is provided with two long-span cablestayed bridges trend curve bridge towers, described long-span cablestayed bridges trend curve bridge tower is made up of upper cantilever arm and bottom support bracket, and described upper cantilever arm tilts to span centre; Described bottom support bracket includes the first supporting leg tilted towards span centre direction and the second supporting leg tilted towards span centre direction dorsad; Described second supporting leg lower outside is connected to the 3rd supporting leg extended towards span centre direction dorsad; It is provided with cross-brace beam between the first described supporting leg and the second supporting leg; First supporting leg of described long-span cablestayed bridges trend curve bridge tower, the second supporting leg and the 3rd supporting leg lay respectively at first foundation, on the second basis and the 3rd basis; It is between described first supporting leg and first foundation, between described second supporting leg and described second basis, between described 3rd supporting leg and the 3rd basis and is rigidly connected; The top of described every skew cables is longitudinally individually fixed in described long-span cablestayed bridges trend curve bridge tower on the side of span centre, and bottom is longitudinally individually fixed in main span; Described long-span cablestayed bridges trend curve bridge tower back is provided with dorsal funciculus; Described dorsal funciculus top is fixed on the top of the upper cantilever arm of described bridge tower, and the bottom of described dorsal funciculus is on the 3rd supporting leg being fixed in described long-span cablestayed bridges trend curve bridge tower.
Preferably, it is provided with triangular support structure or circular support structure between above described cross-brace beam and below upper cantilever arm.
Preferably, the 3rd described arch is provided with multiple suspension cable fixture from top to bottom towards the edge of span centre, and the top of described every skew cables is individually fixed in described long-span cablestayed bridges trend curve bridge tower towards on the side of span centre by multiple suspension cable fixtures.
Preferably, span centre direction dorsad, described upper cantilever arm top is provided with upper cantilever arm top boss, and described upper cantilever arm top boss is provided with dorsal funciculus top fixture, and described dorsal funciculus top is fixed on the top of the upper cantilever arm of described bridge tower by dorsal funciculus top fixture.
Preferably, the upper cantilever arm of described long-span cablestayed bridges trend curve bridge tower is steel construction or reinforced concrete structure, and described bottom support bracket is steel construction or reinforced concrete structure.
Preferably, described multiple skew cables is installation arranged in parallel.
Preferably, described big across the single bridge tower structure of transverse direction employing tilting arch bridge pylon cable-stayed bridge, described long-span cablestayed bridges trend curve bridge tower is positioned at the lateral center of main span and end bay, and the both sides of described long-span cablestayed bridges trend curve bridge tower are single width bridge floor.
It is preferred that be configured to the first arch between described first supporting leg, the second supporting leg and cross-brace beam; The first described arch opening down; Being the second arch between described second supporting leg and the 3rd supporting leg, the second described arch is opening down, and the inner side of described upper cantilever arm and bottom support bracket constitutes the 3rd arch, and the 3rd described arch opening is towards span centre.
In such scheme, the preferred catenary of curve of the 3rd described arch, catenary formula is:
Y=f (ch (k ξ)-1)/(m-1)
Wherein, k = ln ( m + m 2 - 1 ) ;
M: arch axis coefficient; The size of its reflection arch curvature. M is more big, and curve is more steep at arch springing place, and the quartile position of curve is more high;
Hyperbolic cosine ch (k ξ)=(exp (k ξ)+exp (-k ξ))/2
F: the rise of arch
ξ: ξ=2x/L
L: for span
X: the x-axis coordinate y of arch: the y-axis coordinate of arch.
Of the present invention big across having the advantage that across inclination arch bridge pylon cable-stayed bridge greatly
1, cable-stayed bridge system have employed long-span cablestayed bridges trend curve bridge tower, increases bridge tower length, reduces bridge tower height;
2, suspension cable connects bridge main span and the inner side of long-span cablestayed bridges trend curve bridge tower respectively, it is ensured that bridge deck structure is stable;
3, the back of long-span cablestayed bridges trend curve bridge tower is set to self-hard dorsal funciculus and forms stabilising system balance suspension cable pulling force;
4, full-bridge design is steel construction and reinforced concrete structure combines, it is ensured that building intensity, improves efficiency of construction, controlled investment budget simultaneously.
Accompanying drawing explanation
Fig. 1 is long-span cablestayed bridges trend curve bridge tower schematic diagram of the present invention.
Fig. 2 is the described big across tilting arch bridge pylon cable-stayed bridge schematic diagram of the present invention.
Fig. 3 is the partial structurtes schematic diagram of the present invention.
Fig. 4 is of the present invention big across tilting arch bridge pylon cable-stayed bridge span centre position transversary schematic diagram.
Fig. 5 is the catenary coordinate diagram of the 3rd arch of the present invention.
In figure: 1-long-span cablestayed bridges trend curve bridge tower, 2-upper cantilever arm, 3-bottom support bracket, 4-the first supporting leg, 5-the second supporting leg, 6-the 3rd supporting leg, 7-cross-brace beam, 8-the first arch, 9-the second arch, 10-the 3rd arch, 11-triangular support, 12-suspension cable fixture, 13-upper cantilever arm top boss, 14-dorsal funciculus top fixture, 15-dorsal funciculus bottom fixture, 16-first foundation, 17-the second basis, 18-the 3rd basis, 19-suspension cable, 20-dorsal funciculus, 22-main span, 23-end bay, 24-single width bridge floor, 25-central authorities isolation area.
Detailed description of the invention
The performance of the present invention is described below in conjunction with accompanying drawing, but they are not intended that limitation of the invention, only for example. Simultaneously by illustrating that advantages of the present invention will become clearer from easy to understand.
Embodiment 1: referring to Fig. 1.The present embodiment proposes big across tilting in arch bridge pylon cable-stayed bridge, is provided with long-span cablestayed bridges trend curve bridge tower 1, is made up of upper cantilever arm 2 and bottom support bracket 3.
Wherein, the preferred steel material of upper cantilever arm 2 of described long-span cablestayed bridges trend curve bridge tower 1, adopt Steel Structural Design, it would however also be possible to employ the material of other high intensity. Described bottom support bracket 3 adopts armored concrete material. Between upper cantilever arm 2 and the bottom support bracket 3 of the present embodiment, one-piece casting is integrated. During construction, the steel construction bottom of upper cantilever arm 2 connects with the bar construction of bottom support bracket 3 with welding manner, then builds the xoncrete structure of bottom support bracket 3 again, and the connection to ensure upper cantilever arm 2 and bottom support bracket 3 is reliable.
In the present embodiment, the lower section of described bottom support bracket 3, the first supporting leg the 4, second supporting leg 5 and the 3rd supporting leg 6 it is disposed with from span centre towards end bay direction. The first described supporting leg 4 tilts to stretch out towards span centre direction. Described the second supporting leg 5 span centre direction dorsad tilts to stretch out. The top of described 3rd supporting leg 6 is connected with the second supporting leg 5 lower outside. Described 3rd supporting leg 6 is positioned at the outermost of bottom support bracket 3, and span centre direction is stretched out dorsad.
Described first supporting leg the 4, second supporting leg 5 and the 3rd supporting leg 6 are positioned at approximately the same plane and are longitudinally arranged along long-span cablestayed bridges trend curve bridge tower 1. The top of described first supporting leg 4 and the top of the second supporting leg 5 are intersected in the top of bottom support bracket 3, the i.e. bottom of upper cantilever arm 2.
It is provided with cross-brace beam 7 between in the middle part of the first described supporting leg 4 and in the middle part of the second supporting leg 5. The bottom of described first supporting leg 4, the second supporting leg 5 bottom and described cross-brace beam 7 collectively form the first arch 8. The first described arch 8 tilts towards span centre direction dorsad, and opening is straight down.
The top of the 3rd described supporting leg 6 connects the middle part of the second supporting leg 5. The 3rd described supporting leg 6 and the bottom of the second supporting leg 5 constitute the second arch 9. The second described arch 9 tilts towards span centre direction, and opening is straight down.
In the present embodiment, the first described arch 8 and the span ratio of the second arch 9 are 0.5:1, and rise ratio is similarly 0.5:1.
The first described arch 8 and the second arch 9 being designed as in the present embodiment: span centre direction tilts and tilts towards span centre direction dorsad respectively. The first described arch 8 and the ogive curve of the second arch 9 can also adopt other curves such as circular arc line, parabola.
In the present embodiment, upper cantilever arm 2 and the first supporting leg 4 are positioned at the span centre side of whole long-span cablestayed bridges trend curve bridge tower 1, and stretch out to span centre direction, constitute the opening the 3rd arch 10 towards span centre direction.
The ogive curve of described 3rd arch 10 adopts catenary, and the formula of catenary is:
Y=f (ch (k ξ)-1)/(m-1)
Wherein, k = ln ( m + m 2 - 1 ) ;
M: arch axis coefficient, the size of its reflection arch curvature, m is more big, and curve is more steep at arch springing place, and the quartile position of curve is more high;
Hyperbolic cosine ch (k ξ)=(exp (k ξ)+exp (-k ξ))/2
F: for the rise of arch;
ξ: ξ=2x/L;
L: for the span of arch;
X: the x-axis coordinate of arch; Y: the y-axis coordinate of arch; As shown in Figure 5.
This bridge is calculated contrast according to by different arch axis coefficients, considers the factor such as construction costs and difficulty of construction, m value is fixed between 1-1.8.
Referring to Fig. 1 and 3, in the present embodiment, the 3rd arch 10 edge that upper cantilever arm 2 is constituted together with the first supporting leg 4 is provided with multiple suspension cable fixture 12 for fixing suspension cable 19 top.Span centre direction dorsad, described upper cantilever arm 2 top is provided with upper cantilever arm top boss 13, and described upper cantilever arm top boss 13 is provided with the dorsal funciculus top fixture 14 on fixing dorsal funciculus 20 top.
Triangle support 11 structure between described first supporting leg the 4, second supporting leg 5 and described cross-brace beam 7. Described triangular support 11 structure is triangle, and three limits are curved configuration design. The drift angle A that described triangular support 11 is the highest is arranged on below the bottom of upper cantilever arm 2. The opposite side BC of drift angle A is cross-brace beam 7, and two summits of this edge are B point and C point: B point is positioned at the middle part of the first supporting leg 4, and C point is positioned at the middle part of the second supporting leg 5. Two contained side AB and AC of the drift angle A of described triangular support 11 structure, are respectively as follows: the AC limit in the AB limit close to span centre direction and span centre direction dorsad.
In specific design, the AB limit of triangular support 11 structure and the 3rd arch 10 are similarly curvilinear structures design, are wide design between triangular support 11 and the 3rd arch 10. The AB limit of triangular support 11 structure is identical with the outer side edges curve of lower base, also ensures that between triangular support 11 and the outside of lower base be wide design.
In the industry, triangle is common rock-steady structure system, substantial amounts of in engineering structure, such as the rod member layout etc. of steel truss girder. For the present embodiment, triangle is optimum form. Triangle, compared with other polygonal structures, has the character of shape invariance, and this is also the embodiment of triangle stability.
In the present embodiment, on the whole, described long-span cablestayed bridges trend curve bridge tower 1 is by the 3rd the constituted tilting structure of arch 10 of curve. 3rd arch 10 is made up of upper cantilever arm 2 and the first supporting leg 4, is used for installing suspension cable 19. Upper cantilever arm 2 is Curve Design, tilts to span centre direction, it is possible to reduce overall tower height. First supporting leg 4 of bottom support bracket 3 stretches out to span centre direction, it is ensured that the balance of upper cantilever arm 2. 3rd supporting leg 6 stretches out in span centre direction dorsad, it is ensured that the balance of overall long-span cablestayed bridges trend curve bridge tower 1. Second supporting leg 5 is positioned at outside the projection of upper cantilever arm 2, it is ensured that overall long-span cablestayed bridges trend curve bridge tower 1 balances. Triangular support 11 structure can reduce cost, reduces deadweight, and does not affect the intensity of bottom support bracket 3. First arch 8 of the bottom of bottom support bracket 3 and the second common stress by entirety of arch 9 are shared to the first supporting leg 4, on the second supporting leg 5 and the 3rd supporting leg 6.
Embodiment 2, referring to Fig. 2 and 3, the present embodiment proposition is a kind of utilizes the big across tilting arch bridge pylon cable-stayed bridge of long-span cablestayed bridges trend curve bridge tower 1 design described in embodiment 1, including: suspension cable 19, long-span cablestayed bridges trend curve bridge tower 1, main span 22, end bay 23, first foundation the 16, second basis 17 and the 3rd basis 18.
As in figure 2 it is shown, be main span 22 between described two long-span cablestayed bridges trend curve bridge towers 1, outside is two end bays 23 respectively.
Referring to Fig. 2~4, described tilting cable-stayed bridge is provided with two long-span cablestayed bridges trend curve bridge towers 1, lays respectively at the both sides of main span 22. Main span 22 and end bay 23 joint support and are positioned on long-span cablestayed bridges trend curve bridge tower 1. The transverse direction of tilting cable-stayed bridge described in the present embodiment adopts single bridge tower structure, namely only arranges a long-span cablestayed bridges trend curve bridge tower 1 in main span 22 one end lateral center, and long-span cablestayed bridges trend curve bridge tower 1 both lateral sides is single width bridge floor 24.
As shown in Figure 3, the long-span cablestayed bridges trend curve bridge tower 1 of the present embodiment adopts long-span cablestayed bridges trend curve bridge tower 1 structure described in embodiment 1, first supporting leg the 4, second supporting leg 5 of described long-span cablestayed bridges trend curve bridge tower 1 and the 3rd supporting leg 6 lay respectively at first foundation 16, on the second basis 17 and the 3rd basis 18.
Described in the present embodiment, first foundation 16, second basis 17 and the 3rd basis 18 lay respectively at main span 22 two ends, adopt in the deep stratum at the bottom of river of the form of stake. First supporting leg the 4, second supporting leg 5 of described long-span cablestayed bridges trend curve bridge tower 1 and the 3rd supporting leg 6 lay respectively on first foundation the 16, second basis 17 and the 3rd basis 18. It is between described first supporting leg 4 and first foundation 16, between described second supporting leg 5 and described second basis 17 and is rigidly connected, namely connect as one between the two.
For being rigidly connected between first supporting leg 4 and first foundation 16, specifically built by armored concrete and form. The bottom surface of the first supporting leg 4 is rectangle, and width and long-span cablestayed bridges trend curve bridge tower 1 are wide, and length is the same with first foundation 16 length. First supporting leg 4 is directly installed on the top of first foundation 16. First foundation 16 is reinforcing bar mixed territory piling strtucture, and generally cylinder, bottom is pile foundation structure.
Second supporting leg 5 and the second basis 17, for being rigidly connected, are specially to be built by armored concrete and form. The bottom surface of the second supporting leg 5 is rectangle, and width and long-span cablestayed bridges trend curve bridge tower 1 are wide, and length 17 length basic with second are the same. Second supporting leg 5 is directly installed on the top on the second basis 17. Second basis 17 is reinforcing bar mixed territory piling strtucture, generally cylinder. The bottom on the second basis 17 is pile foundation structure.
Between 3rd supporting leg 6 and the 3rd basis 18, it is specially the design of pile cap steel junction structure. The bottom surface of the 3rd supporting leg 6 is rectangle, and width and long-span cablestayed bridges trend curve bridge tower 1 are wide, and basic 18 length of length the 3rd are the same. 3rd supporting leg 6 is directly connected with the top on the 3rd basis 18. 3rd basis 18 is reinforcing bar mixed territory piling strtucture, generally cylinder. The bottom on the 3rd basis 18 is pile foundation structure.
Referring to Fig. 1~3, the 3rd arch 10 opening of described long-span cablestayed bridges trend curve bridge tower 1 is vertically arranged with suspension cable fixture 12 towards the edge in span centre direction, for fixing the top of suspension cable 19. Described suspension cable fixture 12 is anchor Fixed Design, and described suspension cable fixture 12 is welded on the edge inside the 3rd arch 10. The bottom of described suspension cable 19 is longitudinally individually fixed on the bridge at span centre position. The multiple skew cables 19 that described suspension cable 19 is arranged in parallel from top to bottom is constituted.
The longitudinal both sides of described long-span cablestayed bridges trend curve bridge tower 1 are provided with drag-line, are wherein suspension cable 19 near span centre side, and span centre side is dorsal funciculus 20 dorsad. The top of the upper cantilever arm 2 of described long-span cablestayed bridges trend curve bridge tower 1 is provided with upper cantilever arm top boss 13, and described upper cantilever arm top boss 13 is provided with dorsal funciculus top fixture 14, for fixing the top of dorsal funciculus 20. 3rd supporting leg 6 of described long-span cablestayed bridges trend curve bridge tower 1 and the 3rd basis 18 are rigidly connected on the 3rd supporting leg 6 at position and are provided with dorsal funciculus bottom fixture 15, and the bottom of described dorsal funciculus 20 is from being fixed on dorsal funciculus bottom fixture 15. Described dorsal funciculus 20 is a skew cables; Or suspension cable one group parallel.
Embodiment 3, the present embodiment propose a kind of concrete utilize that long-span cablestayed bridges trend curve bridge tower 1 design big across inclination arch bridge pylon cable-stayed bridge.The structure of this cable-stayed bridge system is substantially the same manner as Example 2. The present embodiment is due to the limited high request in construction area, and the tower top absolute altitude of long-span cablestayed bridges trend curve bridge tower 1 must control within 115 meters.
In the present embodiment, upper cantilever arm 2 width of long-span cablestayed bridges trend curve bridge tower 1 is 6 meters. The steel construction part of upper cantilever arm 2 is 6 meters of width, and the bottom of upper cantilever arm 2 and the top of bottom support bracket 3 are all 6 meters of width. The width of bottom support bracket 3 broadens on the whole from top to bottom gradually, and the width of same level At The Height is equal, is uniformly extended to 9.5 meters from 6 meters. First supporting leg the 4, second supporting leg 5 of this long-span cablestayed bridges trend curve bridge tower 1 bottom support bracket 3 and the width of the 3rd supporting leg 6 are 9.5 meters.
As it is shown in figure 1, the 3rd arch 10 that the upper cantilever arm 2 of long-span cablestayed bridges trend curve bridge tower 1 and the first supporting leg 4 are constituted selects catenary shape. The centrage of the 3rd described arch 10 meets aforementioned catenary formula: y=f (ch (k ξ)-1)/(m-1). To in above-mentioned formula, arch axis coefficient m is calculated when taking different value.
When arch axis coefficient takes 1,1.5,2,10,30,100, when ratio of rise to span (i.e. f/L) respectively 1/2 and 1/3 time, according to finite element analysis software, the 3rd arch 10 is analyzed its stress and moment, obtains table 1 below. Table 1: maximal bending moment and greatest axis power table when catenary ratio of rise to span (f/L) is 1/2 and 1/3
As can be seen here: along with the reduction of ratio of rise to span, the stress of tower tends to reasonable, when ratio of rise to span is 0, bridge tower is straight tower, and this bridge is conventional cable-stayed bridge. Along with the reduction of ratio of rise to span, the efficiency of dorsal funciculus also gradually steps up.
Choosing ratio of rise to span (f/L) in the present embodiment is 1/2, designs the 3rd arch 10.
In the present embodiment, the bottom of long-span cablestayed bridges trend curve bridge tower 1 is bottom support bracket 3, and bottom support bracket 3 is internal is provided with triangular support 11, and bottom is made up of cross-brace beam the 7, first supporting leg the 4, second supporting leg 5 and the 3rd supporting leg 6.
As it is shown in figure 1, the drift angle of this triangular support 11 respectively A, B, C are made up of three camber lines, it is similar to an equilateral triangle. The each limit of AB of this equilateral triangle ABC, AC limit and BC limit are curve. A point is to B point, and B point is to C point, and C point is 25 meters to the length of side of the air line distance of A point. This equilateral triangle ABC, its center of gravity is the center of gravity of triangular support 11, this center of gravity vertical dimension single width 9 meters of bridge floor of distance.
As it is shown on figure 3, the bottom of bottom support bracket 3 is the first supporting leg the 4, second supporting leg 5 and the 3rd supporting leg 6, it is separately mounted on first foundation the 16, second basis 17 and the 3rd basis 18. First described supporting leg the 4, second supporting leg 5 and the bottom of the 3rd supporting leg 6 are positioned in same level. It is the first arch 8 between first supporting leg 4 and the second supporting leg 5, is the second arch 9 between the second supporting leg 5 and the 3rd supporting leg 6.
First arch 8 height 27 meters, span is 79.2 meters.
Second arch 9 height 10 meters, span is 56 meters.
First arch 8 and the second arch 9 all adopt circular curve to design. The height of arch is the upper summit distance to span center line of arch.
In the present embodiment, just tie mode with cushion cap below long-span cablestayed bridges trend curve bridge tower 1 bottom support bracket 3 and connected first foundation 16, the second basis 17, the 3rd basis 18. First foundation 16, the second basis 17, the 3rd basis 18 is collectively forming consolidation system with long-span cablestayed bridges trend curve bridge tower 1 entirety, is the version of a globality completely.
The produced pulling force of described suspension cable 19 is fully transmitted on long-span cablestayed bridges trend curve bridge tower 1. Being shared by the pulling force born of long-span cablestayed bridges trend curve bridge tower 1 is transferred on first foundation the 16, second basis 17. Long-span cablestayed bridges trend curve bridge tower 1 back side stress is: owing to dorsal funciculus 20 is from admittedly on the 3rd supporting leg 6, the pulling force of dorsal funciculus 20 is born by the 3rd basis 18 completely.
Being designed obtaining by full-bridge force analysis: the length of first foundation 16 × wide × height is 20 × 9.5 × 3.75 meters, the length on the second basis 17 × wide × height is 15 × 9.5 × 3.00 meters, and the length on the 3rd basis 18 × wide × height is 8.0 × 9.5 × 3.0 meters.
As in figure 2 it is shown, the main bridge total length of tilting cable-stayed bridge described in the present embodiment is 845.4 meters. The length of main bridge is determined by main span 22 length, the length of two the first arches 8 and the length of two the second arches 9. Wherein, main span 22 is 575 meters, adopt the design of 56+79.2+575+79.2+56 rice, that is: the first supporting leg 4 and the second supporting leg 5 spacing 56 meters of each long-span cablestayed bridges trend curve bridge tower 1, second supporting leg 5 is to the 3rd supporting leg 6 spacing 79.2 meters, and the distance between two the first supporting legs 4 of two long-span cablestayed bridges trend curve bridge towers 1 is 575 meters.
Long-span cablestayed bridges trend curve bridge tower 1 height overall 111.5 meters, upper cantilever arm 2 top is 90.5 meters to bridge floor single width bridge floor 24. The bottom of the first supporting leg 4 is 21 meters to the distance of bridge floor single width bridge floor 24. The bottom of upper cantilever arm 2 and the top distance bridge floor single width bridge floor 24 of bottom support bracket 3 are 38 meters.
As shown in Figures 2 and 3, the present embodiment is tilting cable-stayed bridge, connects organizing parallel suspension cable 19 between the 3rd arch 10 and the main span 22 of long-span cablestayed bridges trend curve bridge tower 1 more, and long-span cablestayed bridges trend curve bridge tower 1 back is additionally provided with dorsal funciculus 20.
As shown in figs. 2 to 4, the 3rd described arch 10 is on the side of span centre, and same level height is respectively arranged with a suspension cable fixture 12, the top of each one suspension cable 19 of self-retaining near dual-side. The bottom of the two suspension cable 19 is fixed in main span 22. The bottom of suspension cable 19 longitudinally constitutes two straight lines successively. It is central authorities isolation areas 25 between these two straight lines.
The top of upper cantilever arm 2, span centre side is provided with upper cantilever arm top boss 13 dorsad. Described upper cantilever arm top boss 13 is provided with dorsal funciculus top fixture 14. Described dorsal funciculus top fixture 14 is for connecting the top of dorsal funciculus 20. The bottom of described dorsal funciculus 20 adopts from mode admittedly, utilizes dorsal funciculus bottom fixture 15 to be fixed on the 3rd supporting leg 6.
As shown in Figure 4, the present embodiment is tilting cable-stayed bridge. The transverse width of main span 22 position is 49 meters, it may be assumed that a single width bridge floor 24 is 19 meters, is the central isolation area 25 of 11 meters between two single width bridge floors 24. The concrete region of one single width bridge floor 24 divides as shown in table 2:
Table 2: single width bridge floor transverse direction zoning
Railing 0.5 meter
Go slowly 7 meters
Anti-collision wall 0.5 meter
Anti-collision wall 0.5 meter
Runway 3 × 3.5 meters
Add up to: single width bridge floor width 19 meters
End bay 23 part of tilting cable-stayed bridge is provided with access bridge. The initial segment of described access bridge is likewise provided as two single width bridge floors 24 and a central isolation area 25. The middle section position of described access bridge, central authorities isolation area 25 gradually decreases width, and two single width bridge floor 24 width are constant.
One of the present invention is provided with tilting cable-stayed bridge, and its long-span cablestayed bridges trend curve bridge tower 1 is designed with curvilinear structures, meets the landscape need also taking into account this ground while zonal limit for height requires.Tilting cable-stayed bridge designed by the present invention considers mechanical structure and engineering structure simultaneously, and actual demand and construction budget have been done effective balance and choice. This tilting Design of Cable-Stayed Bridge is attractive in appearance, builds firm, meets the demand in this region.
Described above as the tilting cable-stayed bridge that the present invention is embodied as.
Other unspecified part all has prior art.

Claims (9)

1. big across tilting arch bridge pylon cable-stayed bridge, including long-span cablestayed bridges trend curve bridge tower (1), first foundation (16), the second basis (17), the 3rd basis (18), multiple skew cables (19) main span (22) and end bay (23), it is characterized in that: greatly inclination arch bridge pylon cable-stayed bridge is provided with two long-span cablestayed bridges trend curve bridge tower (1), described long-span cablestayed bridges trend curve bridge tower (1) is made up of upper cantilever arm (2) and bottom support bracket (3), and described upper cantilever arm (2) tilts to span centre; Described bottom support bracket (3) includes the first supporting leg (4) tilted towards span centre direction and the second supporting leg (5) tilted towards span centre direction dorsad; Described second supporting leg (5) lower outside is connected to the 3rd supporting leg (6) extended towards span centre direction dorsad; It is provided with cross-brace beam (7) between described the first supporting leg (4) and the second supporting leg (5); First supporting leg (4) of described long-span cablestayed bridges trend curve bridge tower (1), the second supporting leg (5) and the 3rd supporting leg (6) lay respectively at first foundation (16), the second basis (17) and on the 3rd basic (18); It is between described first supporting leg (4) and first foundation (16), between described second supporting leg (5) and described second basic (17), between the 3rd described supporting leg (6) and the 3rd basis (18) and is rigidly connected; The top of described every skew cables (19) is longitudinally individually fixed in described long-span cablestayed bridges trend curve bridge tower (1) on the side of span centre, and bottom is longitudinally individually fixed in main span (22); Described long-span cablestayed bridges trend curve bridge tower (1) back is provided with dorsal funciculus (20); Described dorsal funciculus (20) top is fixed on the top of the upper cantilever arm (2) of described bridge tower, and the bottom of described dorsal funciculus (20) is on the 3rd supporting leg (6) being fixed in described long-span cablestayed bridges trend curve bridge tower (1).
2. according to claim 1 big across tilting arch bridge pylon cable-stayed bridge, it is characterised in that: it is provided with triangular support (11) structure or circular support structure between described cross-brace beam (7) top and upper cantilever arm (2) lower section.
3. according to claim 1 big across tilting arch bridge pylon cable-stayed bridge, it is characterized in that: the 3rd arch (10) is provided with multiple suspension cable fixture (12) from top to bottom towards the edge of span centre, the top of described every skew cables (19) is individually fixed in described long-span cablestayed bridges trend curve bridge tower (1) on the side of span centre by multiple suspension cable fixtures (12).
4. according to claim 1 big across tilting arch bridge pylon cable-stayed bridge, it is characterized in that: span centre direction dorsad, described upper cantilever arm (2) top is provided with upper cantilever arm top boss (13), described upper cantilever arm top boss (13) is provided with dorsal funciculus top fixture (14), and described dorsal funciculus (20) top is fixed on the top of the upper cantilever arm (2) of described bridge tower by dorsal funciculus top fixture (14).
5. according to claim 1 big across tilting arch bridge pylon cable-stayed bridge, it is characterized in that: the upper cantilever arm (2) of described long-span cablestayed bridges trend curve bridge tower (1) is steel construction or reinforced concrete structure, described bottom support bracket (3) is steel construction or reinforced concrete structure.
6. according to claim 1 big across tilting arch bridge pylon cable-stayed bridge, it is characterised in that: described multiple skew cables (19) is installation arranged in parallel.
7. according to claim 1 big across tilting arch bridge pylon cable-stayed bridge, it is characterized in that: described big across the single bridge tower structure of transverse direction employing tilting arch bridge pylon cable-stayed bridge, described long-span cablestayed bridges trend curve bridge tower (1) is positioned at main span (22) and the lateral center of end bay (23), and the both sides of described long-span cablestayed bridges trend curve bridge tower (1) are single width bridge floor (24).
8. according to arbitrary big across tilting arch bridge pylon cable-stayed bridge in claim 1-7, it is characterised in that: it is configured to the first arch (8) between described first supporting leg (4), the second supporting leg (5) and cross-brace beam (7); Described the first arch (8) opening down; It is the second arch (9) between described second supporting leg (5) and the 3rd supporting leg (6), described the second arch (9) is opening down, the inner side of described upper cantilever arm (2) and bottom support bracket (3) constitutes the 3rd arch (10), and the 3rd described arch (10) opening is towards span centre.
9. according to claim 8 big across tilting arch bridge pylon cable-stayed bridge, it is characterised in that: the curve of the 3rd described arch (10) is catenary, and catenary formula is:
Y=f (ch (k ξ)-1)/(m-1)
Wherein, k = l n ( m + m 2 - 1 ) ;
M: arch axis coefficient;
Hyperbolic cosine ch (k ξ)=(exp (k ξ)+exp (-k ξ))/2
F: for the rise of arch;
ξ: ξ=2x/L;
L: for the span of arch;
X: the x-axis coordinate of arch; Y: the y-axis coordinate of arch.
CN201410784799.8A 2014-12-16 2014-12-16 Big across tilting arch bridge pylon cable-stayed bridge CN104612032B (en)

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CN105442448A (en) * 2015-11-19 2016-03-30 马玉荣 Bridge stabilizing device
CN109763417B (en) * 2019-01-31 2020-11-10 同济大学建筑设计研究院(集团)有限公司 Cable-stayed steel truss cooperative system bridge

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CN102644241A (en) * 2012-04-05 2012-08-22 广东省长大公路工程有限公司 Space curved cable bent tower of cable-stayed bridge

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FR2797893A1 (en) * 1999-08-24 2001-03-02 Freyssinet Int Stup Method for constructing a haubane bridge
KR20070083452A (en) * 2007-01-08 2007-08-24 가와다 고교 가부시키가이샤 Cable stayed suspension bridge making combined use of one-box and two-box girders
CN101424072A (en) * 2008-11-18 2009-05-06 中铁一局集团有限公司 Counter weight control construction method for large span un-symmetric segment stayed-cable bridge
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