CN104612032A - Large-span inclined arched bridge tower cable-stayed bridge - Google Patents
Large-span inclined arched bridge tower cable-stayed bridge Download PDFInfo
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- CN104612032A CN104612032A CN201410784799.8A CN201410784799A CN104612032A CN 104612032 A CN104612032 A CN 104612032A CN 201410784799 A CN201410784799 A CN 201410784799A CN 104612032 A CN104612032 A CN 104612032A
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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
- E01D11/04—Cable-stayed bridges
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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
- E01D19/00—Structural or constructional details of bridges
- E01D19/14—Towers; Anchors ; Connection of cables to bridge parts; Saddle supports
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Abstract
The invention discloses a large-span inclined arched bridge tower cable-stayed bridge which comprises a plurality of stay cables, large-span cable-stayed bridge inclined curved bridge towers, first foundations, second foundations and third foundations. The bridge towers are composed of upper cantilevers and bottom supports, and the upper cantilevers are inclined towards the midspan. The bottom supports comprise first supporting legs, second supporting legs and third supporting legs, and the first supporting legs, the second supporting legs and the third supporting legs are rigidly connected to the first foundations, the second foundations and the third foundations respectively. Transverse supporting beams are arranged between the first supporting legs and the second supporting legs. The top ends of the stay cables are longitudinally fixed to the side faces, towards the midspan, of third arches respectively, and the bottom ends of the stay cables are longitudinally fixed to the midspan of the bridge. Back cables are arranged on the backs of the bridge towers. The top ends of the back cables are fixed to the top ends of the upper cantilevers of the bridge towers, and the bottom ends of the back cables are fixed to the third supporting legs of the bridge towers. The height and cost of the cable-stayed bridge are effectively lowered, modeling is attractive, the overall structure is stable, and the requirement of a height limiting area is met.
Description
Technical field
The present invention relates to Design of Cable-Stayed Bridge technical field, be specifically related to large across inclination arch bridge pylon cable-stayed bridge.
Background technology
Cable stayed bridge is a kind of design scheme of relative maturity, but for more than 500 meters large span stayed-cable bridges, its structure design is comparatively single.Large span stayed-cable bridge king-tower turriform common is at present H-shaped, diamond, A shape, Y shape or only cylindricality isoline tower.Turriform data see 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 pattern cable stayed bridge meets cable stayed bridge stress balance general principle, require high area at view, the dullness that this type bridge but shows, landscape effect is limited.Simultaneously at some height limiting zone, because 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.
Along with the fast development of national economy, people require more and more higher to bridge design, rise to the requirement to view from simple communication function, therefore need badly at present a kind of be applicable to greatly across cable-stayed bridge system, on the basis meeting bridge force-bearing, adopt completely novel stress system and external form form, build now owner to bridge height and the higher requirement of bridge appearance to meet.
Summary of the invention
Main purpose of the present invention is the deficiency existed to solve above-mentioned background technology, proposition effectively can reduce height and cost, meet the large across inclination arch bridge pylon cable-stayed bridge of bridge force-bearing situation, makes it be specially adapted to used at height limiting zone or view requirement high field.
For achieving the above object, the present invention proposes a kind of large across inclination arch bridge pylon cable-stayed bridge, comprise 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 comprises towards the first supporting leg of span centre direction inclination and the second supporting leg towards span centre direction inclination dorsad; Described second supporting leg lower outside is connected with the 3rd supporting leg towards span centre direction extension dorsad; Cross binding beam is provided with 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; Be between described first supporting leg and first foundation, between described second supporting leg and described second basis, between the 3rd described supporting leg and the 3rd basis and be rigidly connected; The top of described every skew cables is longitudinally individually fixed in described long-span cablestayed bridges trend curve bridge tower towards 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, triangular support structure or circular support structure is provided with between above described cross binding beam and below upper cantilever arm.
Preferably, the 3rd described arch is furnished 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 fixture.
Preferably, described upper cantilever arm top dorsad span centre direction 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 work or reinforced concrete structure, and described bottom support bracket is steel work or reinforced concrete structure.
Preferably, described multiple skew cables is installation arranged in parallel.
Preferably, the described large transverse direction across inclination arch bridge pylon cable-stayed bridge adopts single bridge tower structure, and 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.
Preferably, described first supporting leg, be configured to the first arch between the second supporting leg and cross binding beam; The first described arch opening down; Be the second arch between described second supporting leg and the 3rd supporting leg, the second described arch is opening down, and described upper cantilever arm and the inner side of bottom support bracket form 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(kξ)－1)/(m－1)
Wherein,
M: arch axis coefficient; The size of its reflection arch curvature.M is larger, and curve is steeper at arch springing place, and the quartile position of curve is higher;
Hyperbolic cosine ch (k ξ)=(exp (k ξ)+exp (-k ξ))/2
F: the rise of arch
ξ：ξ＝2x/L
L: be span
X: the x-axis coordinate y of arch: the y-axis coordinate of arch.
Of the present invention large across having the following advantages across inclination arch bridge pylon cable-stayed bridge tool 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 the inner side of bridge main span and long-span cablestayed bridges trend curve bridge tower respectively, ensures that bridge deck structure is stablized;
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 that steel work and reinforced concrete structure combine, and ensures building intensity, improves efficiency of construction, the budget of controlled investment simultaneously.
Accompanying drawing explanation
Fig. 1 is long-span cablestayed bridges trend curve bridge tower schematic diagram of the present invention.
Fig. 2 is of the present invention described large across inclination arch bridge pylon cable-stayed bridge schematic diagram.
Fig. 3 is partial structurtes schematic diagram of the present invention.
Fig. 4 is of the present invention large across inclination 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-first supporting leg, 5-second supporting leg, 6-the 3rd supporting leg, 7-cross binding beam, 8-first arch, 9-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-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 isolated area.
Detailed description of the invention
Below in conjunction with accompanying drawing, performance of the present invention is described, but they do not form limitation of the invention, only for example.Simultaneously by illustrating that advantage of the present invention will become clearly and easy understand.
Embodiment 1: see Fig. 1.The present embodiment proposes large across in inclination 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 upper cantilever arm 2 preferably steel material of described long-span cablestayed bridges trend curve bridge tower 1, adopts structural steel design, also can adopt the material of other high strength.Described bottom support bracket 3 adopts steel concrete material.Between the upper cantilever arm 2 of the present embodiment and bottom support bracket 3, monobloc cast is integrated.During construction, the steel work bottom of upper cantilever arm 2 connects with the bar construction of welding manner with bottom support bracket 3, and then builds the concrete structure of bottom support bracket 3, reliable to ensure the connection of upper cantilever arm 2 and bottom support bracket 3.
In the present embodiment, the below of described bottom support bracket 3, is disposed with the first supporting leg 4, second supporting leg 5 and the 3rd supporting leg 6 from span centre towards end bay direction.The first described supporting leg 4 tilts to stretch out towards span centre direction.The second described supporting leg 5 dorsad span centre direction 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 4, second supporting leg 5 and the 3rd supporting leg 6 are positioned at same plane and longitudinally arrange 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, i.e. the bottom of upper cantilever arm 2.
Cross binding beam 7 is provided with 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 bottom of the second supporting leg 5 and described cross binding beam 7 form the first arch 8 jointly.The first described arch 8 is towards span centre direction inclination dorsad, and opening 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 form the second arch 9.The second described arch 9 tilts towards span centre direction, and opening 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 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 circular arc line, other curves such as 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, form three arch 10 of an opening towards span centre direction.
The ogive curve of described 3rd arch 10 adopts catenary, and the formula of catenary is:
y＝f(ch(kξ)－1)/(m－1)
Wherein,
M: arch axis coefficient, the size of its reflection arch curvature, m is larger, and curve is steeper at arch springing place, and the quartile position of curve is higher;
Hyperbolic cosine ch (k ξ)=(exp (k ξ)+exp (-k ξ))/2
F: be the rise of arch;
ξ：ξ＝2x/L；
L: be 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, according to being carried out calculating contrast by different arch axis coefficients, is considered the factor such as construction costs and difficulty of construction, m value is fixed between 1-1.8.
See Fig. 1 and 3, in the present embodiment, the 3rd arch 10 edge placement that upper cantilever arm 2 is formed together with the first supporting leg 4 has multiple suspension cable fixture 12 for fixing suspension cable 19 top.Described upper cantilever arm 2 top dorsad span centre direction 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.
Triangular support 11 structure is formed between described first supporting leg 4, second supporting leg 5 and described cross binding 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 binding 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: the AC limit in the AB limit close to span centre direction and dorsad span centre direction.
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, a large amount of in engineering structures, 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 by curve the 3rd arch 10 form tilting structure.3rd arch 10 is made up of, for installing suspension cable 19 upper cantilever arm 2 and the first supporting leg 4.Upper cantilever arm 2 is Curve Design, tilts, can reduce overall tower height to span centre direction.First supporting leg 4 of bottom support bracket 3 stretches out to span centre direction, ensures the balance of upper cantilever arm 2.3rd supporting leg 6 stretches out in span centre direction dorsad, ensures 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, ensures that overall long-span cablestayed bridges trend curve bridge tower 1 balances.Triangular support 11 structure can reduce costs, and reduces deadweight, and does not affect the intensity of bottom support bracket 3.The stressed of entirety is shared on the first supporting leg 4, second supporting leg 5 and the 3rd supporting leg 6 by the first arch 8 of the bottom of bottom support bracket 3 and the second arch 9 jointly.
Embodiment 2, see Fig. 2 and 3, the present embodiment proposition is a kind of utilizes the large across inclination arch bridge pylon cable-stayed bridge of long-span cablestayed bridges trend curve bridge tower 1 design described in embodiment 1, comprising: suspension cable 19, long-span cablestayed bridges trend curve bridge tower 1, main span 22, end bay 23, first foundation 16, second basis 17 and the 3rd basis 18.
As shown in Figure 2, be main span 22 between two described long-span cablestayed bridges trend curve bridge towers 1, outside is respectively two end bays 23.
See 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 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, and the second basis 17 and the 3rd is on 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, in the stratum at the bottom of river adopting the form of stake deep.First supporting leg 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 16, second basis 17 and the 3rd basis 18.Be between described first supporting leg 4 and first foundation 16, between described second supporting leg 5 and described second basis 17 and be rigidly connected, namely connect as one between the two.
For being rigidly connected between first supporting leg 4 and first foundation 16, specifically being built by steel concrete and forming.The bottom surface of the first supporting leg 4 is rectangle, width and long-span cablestayed bridges trend curve bridge tower 1 wide, 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 mixes territory piling strtucture for reinforcing bar, and entirety is cylinder, and bottom is pile foundation structure.
Second supporting leg 5 and the second basis 17, for being rigidly connected, being specially to be built by steel concrete and forming.The bottom surface of the second supporting leg 5 is rectangle, width and long-span cablestayed bridges trend curve bridge tower 1 wide, length is the same with the second basic 17 length.Second supporting leg 5 is directly installed on the top on the second basis 17.Territory piling strtucture is mixed for reinforcing bar in second basis 17, and entirety is cylinder.The bottom on the second basis 17 is pile foundation structure.
Between 3rd supporting leg 6 and the 3rd basis 18, be specially the design of pile cap steel junction structure.The bottom surface of the 3rd supporting leg 6 is rectangle, width and long-span cablestayed bridges trend curve bridge tower 1 wide, 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.Territory piling strtucture is mixed for reinforcing bar in 3rd basis 18, and entirety is cylinder.The bottom on the 3rd basis 18 is pile foundation structure.
See 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, for the top of fixing suspension cable 19 towards the edge in span centre direction.Described suspension cable fixture 12 designs surely for anchoring, 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.Described suspension cable 19 is that multiple skew cables 19 arranged in parallel is from top to bottom formed.
The described longitudinal both sides of long-span cablestayed bridges trend curve bridge tower 1 are provided with drag-line, and be wherein suspension cable 19 near span centre side, 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 the top of fixing dorsal funciculus 20.3rd supporting leg 6 of described long-span cablestayed bridges trend curve bridge tower 1 and the 3rd basis 18 be rigidly connected position the 3rd supporting leg 6 on be provided with dorsal funciculus bottom fixture 15, 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 the suspension cable that a group parallel.
Embodiment 3, the present embodiment propose a kind of specifically utilize long-span cablestayed bridges trend curve bridge tower 1 to design large 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 work 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 evenly extended to 9.5 meters from 6 meters.First supporting leg 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 shown in Figure 1, the upper cantilever arm 2 of long-span cablestayed bridges trend curve bridge tower 1 and the 3rd arch 10 of the first supporting leg 4 formation select catenary shape.The center line of the 3rd described arch 10 meets aforementioned catenary formula: y=f (ch (k ξ)-1)/(m-1).To in above-mentioned formula, calculate when arch axis coefficient m gets different value.
Arch axis coefficient gets 1, and 1.5,2,10,30, when 100, when ratio of rise to span (i.e. f/L) is respectively 1/2 and 1/3, according to finite element analysis software, its stressed and moment is analyzed to the 3rd arch 10, obtains following table 1.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 stressed of tower is tending towards reasonable, and 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 improves gradually.
Choosing ratio of rise to span (f/L) in the present embodiment is 1/2, design 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 inside is provided with triangular support 11, and bottom is made up of cross binding beam 7, first supporting leg 4, second supporting leg 5 and the 3rd supporting leg 6.
As shown in Figure 1, the drift angle of this triangular support 11 is respectively A, B, C and is made up of three camber lines, 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 distance single width distance 9 meters, bridge floor.
As shown in Figure 3, the bottom of bottom support bracket 3 is the first supporting leg 4, second supporting leg 5 and the 3rd supporting leg 6, is arranged on respectively on first foundation 16, second basis 17 and the 3rd basis 18.The first described supporting leg 4, second supporting leg 5 and the bottom of the 3rd supporting leg 6 are positioned in same level.Be be the second arch 9 between the first arch 8, second supporting leg 5 and the 3rd supporting leg 6 between first supporting leg 4 and the second supporting leg 5.
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 distance of upper summit 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 18, basis the 17, three.First foundation 16, the second basis, basis the 17, three 18 forms consolidation system jointly with long-span cablestayed bridges trend curve bridge tower 1 entirety, is the form of structure of a globality completely.
The pulling force produced 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 passed on first foundation 16, second basis 17.Long-span cablestayed bridges trend curve bridge tower 1 back side is stressed is: because 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.
Carry out design by full-bridge force analysis to obtain: the length × wide × height of first foundation 16 is 20 × 9.5 × 3.75 meters, the length × wide × height on the second basis 17 is 15 × 9.5 × 3.00 meters, and the length × wide × height on the 3rd basis 18 is 8.0 × 9.5 × 3.0 meters.
As shown in Figure 2, 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 the length of main span 22 length, 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, and connect to organize parallel suspension cable 19 between the 3rd arch 10 of long-span cablestayed bridges trend curve bridge tower 1 and main span 22, long-span cablestayed bridges trend curve bridge tower 1 back is also provided with dorsal funciculus 20 more.
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 near dual-side, the top of each self-retaining suspension cable 19.The bottom of these two suspension cables 19 is fixed in main span 22.The bottom of suspension cable 19 longitudinally forms two straight lines successively.Be central isolated area 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 the mode of consolidating, and 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, that is: a single width bridge floor 24 is 19 meters, is the central isolated area 25 of 11 meters between two single width bridge floors 24.The concrete Region dividing of a single width bridge floor 24 is as shown in table 2:
Table 2: the horizontal zoning of single width bridge floor
| 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 is wide | 19 meters |
End bay 23 part of tilting cable stayed bridge is provided with access bridge.The initial segment of described access bridge is set to two single width bridge floors 24 and a central isolated area 25 equally.The middle section position of described access bridge, central isolated area 25 reduces width gradually, and two single width bridge floor 24 width are constant.
One of the present invention is provided with tilting cable stayed bridge, and the design of its long-span cablestayed bridges trend curve bridge tower 1 adopts 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 structures simultaneously, and has done effective balance and choice to actual demand and detail estimate.This tilting Design of Cable-Stayed Bridge is attractive in appearance, builds firm, meets the demand in this region.
More than be described as the tilting cable stayed bridge that the present invention specifically implements.
Other unspecified part all has prior art.
Claims (9)
1. large across inclination arch bridge pylon cable-stayed bridge, comprise 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 towers (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) comprises towards first supporting leg (4) of span centre direction inclination and the second supporting leg (5) towards span centre direction inclination dorsad; Described second supporting leg (5) lower outside is connected with the 3rd supporting leg (6) towards span centre direction extension dorsad; Cross binding beam (7) is provided with 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), on the second basis (17) and the 3rd basis (18); Be between described first supporting leg (4) and first foundation (16), between described second supporting leg (5) and described second basis (17), between the 3rd described supporting leg (6) and the 3rd basis (18) and be 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) towards 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 large across inclination arch bridge pylon cable-stayed bridge, it is characterized in that: between described cross binding beam (7) top and upper cantilever arm (2) below, be provided with triangular support (11) structure or circular support structure.
3. according to claim 1 large across inclination arch bridge pylon cable-stayed bridge, it is characterized in that: the 3rd described arch (10) is furnished 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) towards on the side of span centre by multiple suspension cable fixture (12).
4. according to claim 1 large across inclination arch bridge pylon cable-stayed bridge, it is characterized in that: described upper cantilever arm (2) top dorsad span centre direction 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 large across inclination 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 work or reinforced concrete structure, and described bottom support bracket (3) is steel work or reinforced concrete structure.
6. according to claim 1 large across inclination arch bridge pylon cable-stayed bridge, it is characterized in that: described multiple skew cables (19) is installation arranged in parallel.
7. according to claim 1 large across inclination arch bridge pylon cable-stayed bridge, it is characterized in that: the described large transverse direction across inclination arch bridge pylon cable-stayed bridge adopts single bridge tower structure, described long-span cablestayed bridges trend curve bridge tower (1) is positioned at the lateral center of main span (22) and 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 large across inclination arch bridge pylon cable-stayed bridge in claim 1-7, it is characterized in that: described first supporting leg (4), between the second supporting leg (5) and cross binding beam (7), be configured to the first arch (8); Described the first arch (8) opening down; Be the second arch (9) between described second supporting leg (5) and the 3rd supporting leg (6), described the second arch (9) is opening down, described upper cantilever arm (2) forms the 3rd arch (10) with the inner side of bottom support bracket (3), and the 3rd described arch (10) opening is towards span centre.
9. according to claim 8 large across inclination arch bridge pylon cable-stayed bridge, it is characterized in that: the curve of the 3rd described arch (10) is catenary, and catenary formula is:
y＝f(ch(kξ)－1)/(m－1)
Wherein,
M: arch axis coefficient;
Hyperbolic cosine ch (k ξ)=(exp (k ξ)+exp (-k ξ))/2
F: be the rise of arch;
ξ：ξ＝2x/L；
L: be the span of arch;
X: the x-axis coordinate of arch; Y: the y-axis coordinate of arch.
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| CN105442448A (en) * | 2015-11-19 | 2016-03-30 | 马玉荣 | Bridge stabilizing device |
| CN109763417A (en) * | 2019-01-31 | 2019-05-17 | 同济大学建筑设计研究院(集团)有限公司 | A kind of cable stayed steel truss co-operative system bridge |
| CN112048986A (en) * | 2020-08-13 | 2020-12-08 | 中铁大桥勘测设计院集团有限公司 | Inclined arch tower cable-stayed bridge |
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| CN112048986A (en) * | 2020-08-13 | 2020-12-08 | 中铁大桥勘测设计院集团有限公司 | Inclined arch tower cable-stayed bridge |
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|---|---|
| CN104612032B (en) | 2016-06-15 |
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