CN103147385A - Double-spliced extradosed cable-stayed bridge - Google Patents
Double-spliced extradosed cable-stayed bridge Download PDFInfo
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- CN103147385A CN103147385A CN2013100795150A CN201310079515A CN103147385A CN 103147385 A CN103147385 A CN 103147385A CN 2013100795150 A CN2013100795150 A CN 2013100795150A CN 201310079515 A CN201310079515 A CN 201310079515A CN 103147385 A CN103147385 A CN 103147385A
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Abstract
The invention discloses a double-spliced extradosed cable-stayed bridge which is formed by double splicing and widening of single-cable-plane extradosed cable-stayed bridges. A construction method of the double-spliced extradosed cable-stayed bridge comprises the steps that one single-cable-plane extradosed cable-stayed bridge is constructed to serve as a half frame of a new bridge; the other single-cable-plane extradosed cable-stayed bridge is constructed to serve as the other half frame of the new bridge; and the two single-cable-plane extradosed cable-stayed bridges are spliced to form the double-cable-plane (wide-width) double-spliced extradosed cable-stayed bridge. The double-spliced extradosed cable-stayed bridge is designed integrally and constructed by stages, so that pressure of construction investment can be relieved; a requirement of traffic volume increase can be met; and for reconstructing or expanding an old bridge, a requirement of no traffic interruption during a construction period can be met.
Description
Technical field
The invention belongs to the technical field of Transportation Infrastructure Construction, be specifically related to a kind of double combined low-pylon cable-stayed bridge.
Background technology
Low-pylon cable-stayed bridge claims again partial cable-stayed bridge, it has the structural advantages of cable stayed bridge and two kinds of bridge types of cantilever variable cross-section prestressed concrete continuous beam bridge concurrently, have larger rigidity and lower bridge tower height, bridge type is attractive in appearance, span ability is large, having very strong competitiveness at 100-300 rice in across the footpath scope, is a kind of bridge-type structure that development potentiality is arranged very much.Over past ten years, its development speed is particularly swift and violent, and existing nearly hundred low-pylon cable-stayed bridges build up in worldwide, wherein have more than 50 domestic in China.Shi Wenjie is in " low-pylon cable-stayed bridge develop and practice at home and abroad " (" Modern Transportation Technology " the 3rd phase P22-25 in 2012) literary composition, introduced low-pylon cable-stayed bridge developing history at home and abroad, summarize its design feature, and provided built or case history domestic in the part of building, external low-pylon cable-stayed bridge at present.
The structural system of low-pylon cable-stayed bridge mainly contains the two fixed systems of large type: Ta Liangdun, and tower beam consolidation, tower pier separation system.
The low-pylon cable-stayed bridge loading characteristic: its stress performance is between beam bridge and cable stayed bridge.Low-pylon cable-stayed bridge is subjected to curved, pressurized, is cut with Suo Shoula and jointly bear vertical load with girder, and suspension cable more as the external tendon of girder, bears fractional load from the stress characteristic, and girder is played distortion.Suspension cable is only shared fractional load, also have most load by beam be subjected to curved, cut to bear.Its girder rigidity is larger, not only is subjected to axial compression, also will bear the bending and shearing of considerable part, and its stressed division of labor has more selectively.
Low-pylon cable-stayed bridge is take beam stress as main, and with Suo Weifu, girder and bridge tower rigidity are larger, can be designed to artificially the stress system of various structural systems, supporting system and different parameters, and the dynamic characteristics of each this type bridge is not quite similar.
Low-pylon cable-stayed bridge has the characteristics of cable stayed bridge and nonprismatic continuous beam bridge concurrently as a kind of emerging combined system bridge construction form." the cable stayed bridge building technology " that Chen Mingxian writes (People's Transportation Press's publication and distribution) P52 has provided low-pylon cable-stayed bridge and had following characteristics: 1, tower is shorter, tower height is 1/8-1/12 with the ratio of span, and the tower height of conventional cable stayed bridge is 1/4-1/5 with the ratio of span; 2, the non-stayed cable segment of beam is longer, does not hold anchor cable; 3, the ratio of end bay and main span is larger, generally greater than 0.5; 4, deck-molding is larger, and rise-span ratio is 1/30-1/40, often makes the And of Varying Depth beam; 5, drag-line to vertical permanent mobile load share rate less than 30%, stressed with Liang Weizhu, Suo Weifu; 6, the stress variation of suspension cable is less, can design by external prestressing tendon.
Low-pylon cable-stayed bridge is divided into 3 types, Dan Suomian, Shuan Suomian (being divided into again vertical and oblique), three rope faces by the setting of Cable face.When adopting single rope face, drag-line is antitorque inoperative to girder, and girder should adopt torsional rigidity larger cross section.The advantage of single rope face is broad view on bridge floor.When adopting two rope face, the moment of torsion that acts on bridge can be resisted by the axle power of drag-line, and girder can adopt the cross section of less torsional rigidity.As for oblique pair of rope face, it is to bridge floor beam body opposing wind-force torsional oscillation advantageous particularly (oblique pair of rope face limited the teeter of girder).When adopting three rope faces, except the effect characteristics with two rope faces, also bridge can be built up the wide cut bridge.
Low-pylon cable-stayed bridge is divided into single rope face low-pylon cable-stayed bridge, two rope face low-pylon cable-stayed bridge, two rope face wide cut low-pylon cable-stayed bridge, three rope face low-pylon cable-stayed bridges, four rope face low-pylon cable-stayed bridges by the layout of bridge width and rope face.
Low-pylon cable-stayed bridge is according to the structural meterials classification that the case beam of its girder adopts, and can be divided into the hybrid beam structure, Wavelike steel webplate structure of prestressed reinforced concrete construction, steel work, Steel concrete etc.
The U.S. commemorates in new Pearl Harbor that bridge is double tower three rope face low-pylon cable-stayed bridges, 33.70 meters of full-bridge beam overalls.The view water channel cable stayed bridge single width bridge that the Yinchuan of Ningxia Province Chinese mugwort leans on the river is wide 60 meters, is the widest low-pylon cable-stayed bridge of single width that builds in the world at present.
the people such as Yang Shulan are mentioned background engineering in " wide cut low-pylon cable-stayed bridge aseismic analysis and design " (" highway communication technological applications technology version " the 12nd phase P257-261 in 2012) literary composition---Danyang, Jiangsu Province Qi Liang road Jing-Hang Canal Bridge, main bridge is the two rope face prestressed concrete low-pylon cable-stayed bridges of (70+120+70) Mi Shuanta, the overall tower beam consolidation that adopts, the form that Dun Liang separates, girder adopts two case beams to add the crossbeam combined system, 43 meters of bridge floor overall withs, adopt integral type section, king-tower (being the drag-line district) is located at side and is divided band, be two-way 6 tracks in the middle of double tower, the double tower outside is nonmotorized vehicle lane and sidewalk.This bridge adopts two case beams to add the crossbeam combined system, form integral type section, has consisted of the Space Beam lattice pattern of " two case beams+in virtual longeron (bridge deck)+crossbeam ".This bridge has the outward appearance of Two bors d's oeuveres list rope face low-pylon cable-stayed bridge Cheng Qiaohou.
205 west, Huai’an, national highway Jiangsu Province canal, Hangzhoupro, circle highway capital grand bridges, this bridge is single rope face low-pylon cable-stayed bridge, adopt single case three chamber beams, two-way 6 tracks, its cross section consists of: 0.50 meter, 12.50 meters of 2.50 meters (0.50 meter of the 1.50 meters+guardrail in 0.50 meter+Sarasota of guardrail district)+fast traffic lanes of (0.75 meter of 3.75 meters * 3+marginal strip of 0.50 meter+runway of marginal strip)+Intermediate Gray, 12.50 meters of 0.50 meter+fast traffic lanes of railing (0.50 meter of 3.75 meters * 3+ marginal strip of 0.75 meter+runway of marginal strip)+railing.28.50 meters of bridge floor beam overalls.
Quanzhou City, Fujian Province Jinjiang River Bridge girder adopts performance prestressed high Concrete Double wave lenticular beam body new technology, effectively resists the attack of typhoon and prevents that bridge from producing eddy current resonance, is domestic initiation.Arrange between two casees beams of its main structure of a bridge
Connecting cross beamThereby, make width of main beam reach 38 meters, its crossbeam connected mode is worth using for reference.
Summary of the invention
The object of the invention is to: a kind of double combined low-pylon cable-stayed bridge is provided, it is single rope face low-pylon cable-stayed bridge to be carried out Two bors d's oeuveres widen the two rope face wide cut low-pylon cable-stayed bridges that form, be applicable to the disposable integral planning and designing and widen by stages construct and implement greatly across highway (or city) bridge in footpath, or for utilizing the old bridge position to change (expansions) half range economically viable bridge construction scheme that half range is open to traffic of constructing when building new bridge.
Technical solution of the present invention is: this double combined low-pylon cable-stayed bridge carries out Two bors d's oeuveres by single rope face low-pylon cable-stayed bridge and widens and form, after namely first a single rope face low-pylon cable-stayed bridge being become bridge and use, again another adjacent single rope face low-pylon cable-stayed bridge being carried out main body according to the construction sequential closes up, then between the case beam of two single rope face low-pylon cable-stayed bridges, crossbeam is set it is rigidly connected, last cast-in-place bridge deck, leveling layer and making bridge floor; For newly-built double combined low-pylon cable-stayed bridge, its job practices is first to build a single rope face low-pylon cable-stayed bridge as the half range of new bridge, use in advance, build again another single rope face low-pylon cable-stayed bridge as the another half range of new bridge according to building sequential afterwards, at last two single rope face low-pylon cable-stayed bridge splicings are become the double combined low-pylon cable-stayed bridge of Shuan Suomian (wide cut); Build up the double combined low-pylon cable-stayed bridge for old bridge being changed (expansion), its job practices is first to build a single rope face low-pylon cable-stayed bridge as the half range of new bridge in old bridge one side, use in advance, build another single rope face low-pylon cable-stayed bridge as the another half range of new bridge after removing again old bridge, at last two single rope face low-pylon cable-stayed bridge splicings are become the double combined low-pylon cable-stayed bridge of Shuan Suomian (wide cut).
Wherein, the structural system of single rope face low-pylon cable-stayed bridge adopts tower beam consolidation, tower pier separation system, and the Dun Ding below tower and beam arranges pot bearing, selects prestressed concrete box girder or steel case beam.
Wherein, steel concrete crossbeam be rigidly connected (also can take prestressed concrete box girder to be rigidly connected as crossbeam) is adopted in splicing between two single rope face low-pylon cable-stayed bridges, namely set up crossbeam between the case beam of two single rope face low-pylon cable-stayed bridges, draw diaphragm (beam), pier head piece, end floor beam in the case beam to be rigidly connected with suspension cable.
Wherein, horizontally-spliced step: when the case beam of single rope face low-pylon cable-stayed bridge adopts prestressed concrete box girder, widen the default lap joint of side what pier head piece, end floor beam and all suspension cables of single rope face low-pylon cable-stayed bridge hung diaphragm (beam) in the case beam that draws, set up crossbeam between the case beam of two single rope face low-pylon cable-stayed bridges, the prefabricated installation of crossbeam and cast-in-place wet joint or cast-in-site of bracket is set, pier head piece, end floor beam and all suspension cables of crossbeam and single rope face low-pylon cable-stayed bridge hangs the interior diaphragm (beam) of case beam that draws and is rigidly connected; Its sequence of construction is the same with the sequence of construction of girder case beam, first implement and No. 0 beam of the pier No. 0 corresponding crossbeam of piece case beam in top, after symmetrical enforcement and No. 1 (1 '), No. 2 (2 '), No. 3 (3 ') piece case beams successively ... corresponding crossbeam; As take prestressed concrete box girder as crossbeam, default prestress pipe in diaphragm (beam) that should be in the case beam and the crossbeam of setting up is in order to apply transverse prestress; Cast-in-place bridge deck, leveling layer on crossbeam at last, its sequence of construction is with reference to the sequence of construction of crossbeam; When the case beam of single rope face low-pylon cable-stayed bridge adopts steel case beam, set up gooseneck between the steel case beam of two single rope face low-pylon cable-stayed bridges, adopt the bolt weldering to be connected between steel case beam and gooseneck.
Wherein, the bridge deck width of this double combined low-pylon cable-stayed bridge is regulated with the length of the crossbeam of setting up between two casees beams, makes two rope face wide cut low-pylon cable-stayed bridges.
Wherein, after between two single rope face low-pylon cable-stayed bridges, employing is rigidly connected and splices, single rope face low-pylon cable-stayed bridge structure is converted to two rope face low-pylon cable-stayed bridge structures, and the girder between two rope faces has been transformed into Space Beam lattice structure stress system by Space Double cantilever construction stress system; According to main beam stress state and stressed size thereof before and after the stress system conversion, draft each spot size of girder and it is carried out Reinforcement Design and checking computations during design.
Wherein, being designed to the deck transverse slope as single rope face low-pylon cable-stayed bridge of new bridge half range of first building on one side is that 2% slope another side is flat slope (spelling wide side), Yi Bian the deck transverse slope as single rope face low-pylon cable-stayed bridge of the another half range of new bridge of rear construction is designed to is that flat slope (spelling wide side) another side is 2% slope; Cast-in-place leveling layer with Two bors d's oeuveres list rope face low-pylon cable-stayed bridge after bridge floor flat slope between the formed pair of rope face be adjusted into 2% two-way horizontal wall inscription, and the vertical error of eliminating the case top surface of the beam (splicing side) of two single rope face low-pylon cable-stayed bridges arranges, and adopts the cast-in-situ concrete of 10-20 centimetres.
Wherein, the pot bearing of the pile foundation of bridge, pier and pier top comes overall control design or type selecting by two rope faces (wide cut) low-pylon cable-stayed bridge structural behavior, and (or framing) constructed and implemented by stages.
Wherein, when adopting prestressed concrete box girder to carry out " two case beam+crossbeam " splicing connection construction, maybe when adopting steel case beam to carry out splicing (welding or high-strength bolt connect) the construction connection of " two steel case beam+gooseneck ", all should consider the impact when construction period, traffick was wide on bridge construction construction spelling, the scheme of taking vehicle temporarily to detour and short-term suspends traffic, or take the cast-in-place early strength concrete of crossbeam, spell the duration of wide construction to shorten bridge construction.
The present invention has the following advantages:
1, global design, (framing) implemented by stages; Be applicable to the disposable integral planning and designing and highway (or city) bridge of built by separate periods enforcement, can alleviate the investment pressure of one-time construction, and satisfy the demand that the traffic volume increases; For the old bridge reconstruction and extension project, can save the expense of setting up make-shift bridge, and satisfy construction period half range construction half range and pass through and the demand of uninterrupted traffic.
2,Cloth is across flexibly, and is rational in infrastructure; Main span can be selected between 100-200 rice, even can select larger across the footpath; Can lay single tower double-span, double tower three across or the bridge of multitower multispan continuous structure, this class formation has that bridge tower is short, girder is short, large across the footpath, bridge floor is wide, by stages (width) distinguishing feature such as build, structure stress is reasonable.
3,Adopt " two case beam+crossbeam " splicing link technique, built by separate periods Two bors d's oeuveres bridge after first global design is a kind of innovative approach of bridge construction technology.
4,Two bors d's oeuveres list rope face low-pylon cable-stayed bridge is easy to form two rope face (wide cut) low-pylon cable-stayed bridges, and the bridge floor overall width of Two bors d's oeuveres list rope face low-pylon cable-stayed bridge is more than 2 times of bridge floor overall width of single rope face low-pylon cable-stayed bridge, is to build scheme first choice of the wide cut bridge.
5,Spell two (two rope face low-pylon cable-stayed bridge), easy construction with single (single rope face low-pylon cable-stayed bridge); Crossbeam between the case beam of girder and two casees beams can adopt the cast-in-place method of suspension bracket or adopt precast spliced method construction, and technical maturity becomes bridge convenient.
6,Bridge type is attractive in appearance, good economy performance; The succinct smoothness of double combined low-pylon cable-stayed bridge moulding, bridge floor broad view, bridge type are lightly attractive in appearance, such than the cost of Large Span Bridges lower than Hanging Basket cantilever prestress concrete variable cross-section Continuous Box Girder Bridge, cable stayed bridge and suspension bridge.
Description of drawings
Fig. 1 is Danyang, Jiangsu Province Qi Liang road Jing-Hang Canal Bridge master bridge elevational schematic view.
Fig. 2 is Danyang, Jiangsu Province Qi Liang road Jing-Hang Canal Bridge master bridge layout schematic diagram.
Fig. 3 is that schematic diagram is arranged in Jing-Hang Canal Bridge master bridge cross section, Danyang, Jiangsu Province Qi Liang road.
Fig. 4 is 205 canal, Hangzhoupro, circle highway capital, west, Huai’an, national highway Jiangsu Province grand bridge elevational schematic view.
Fig. 5 is 205 canal, Hangzhoupro, circle highway capital, west, Huai’an, national highway Jiangsu Province grand bridge layout schematic diagrames.
Fig. 6 is that schematic diagram is arranged in 205 grand bridge cross sections, canal, Hangzhoupro, circle highway capital, west, Huai’an, national highway Jiangsu Province.
Fig. 7 is that schematic diagram is arranged in double combined low-pylon cable-stayed bridge of the present invention cross section.
The specific embodiment
As shown in Figure 7, this double combined low-pylon cable-stayed bridge can carry out Two bors d's oeuveres by single rope face low-pylon cable-stayed bridge and widens and form; Namely first with a single rope face low-pylon cable-stayed bridge Cheng Qiaohou, again another adjacent single rope face low-pylon cable-stayed bridge being carried out main body according to the construction sequential closes up, then between the case beam of two single rope face low-pylon cable-stayed bridges, crossbeam is set it is rigidly connected, last cast-in-place bridge deck, leveling layer and making bridge floor; For newly-built double combined low-pylon cable-stayed bridge, its job practices is first to build the single rope face of side low-pylon cable-stayed bridge as the half range of new bridge, build again opposite side list rope face low-pylon cable-stayed bridge as the another half range of new bridge, at last two single rope face low-pylon cable-stayed bridge splicings are become the double combined low-pylon cable-stayed bridge of Shuan Suomian (wide cut); For the old bridge reorganization and expansion is become the double combined low-pylon cable-stayed bridge, its job practices is first to build a single rope face low-pylon cable-stayed bridge as the half range of new bridge in old bridge one side, build another single rope face low-pylon cable-stayed bridge as the another half range of new bridge after removing again old bridge, at last two single rope face low-pylon cable-stayed bridge splicings are become the double combined low-pylon cable-stayed bridge of Shuan Suomian (wide cut).
Wherein, the structural system of single rope face low-pylon cable-stayed bridge adopts tower beam consolidation, tower pier separation system, and the Dun Ding below tower and beam arranges pot bearing, selects prestressed concrete box girder or steel case beam.
Wherein, steel concrete crossbeam be rigidly connected (also can adopt prestressed concrete box girder as crossbeam) is adopted in splicing between two single rope face low-pylon cable-stayed bridges, namely set up crossbeam between the case beam of two single rope face low-pylon cable-stayed bridges, draw diaphragm (beam), pier head piece, end floor beam in the case beam to be rigidly connected with suspension cable.
Wherein, horizontally-spliced step: when the case beam of single rope face low-pylon cable-stayed bridge adopts prestressed concrete box girder, widen the default lap joint of side what pier head piece, end floor beam and all suspension cables of single rope face low-pylon cable-stayed bridge hung diaphragm (beam) in the case beam that draws, set up crossbeam between the case beam of two single rope face low-pylon cable-stayed bridges, the diaphragm (beam) that pier head piece, end floor beam and all suspension cables of crossbeam and single rope face low-pylon cable-stayed bridge hangs in the case beam that draws carries out being rigidly connected of cast-in-site of bracket steel concrete; Or the crossbeam of prefabricated installation and cast-in-place wet joint, its sequence of construction is the same with the sequence of construction of girder case beam, first implement and No. 0 beam of the pier No. 0 corresponding crossbeam of piece case beam in top, after symmetrical enforcement and No. 1 (1 '), No. 2 (2 '), No. 3 (3 ') piece case beams successively ... corresponding crossbeam; As when adopting prestressed concrete box girder as connecting cross beam, default prestress pipe in diaphragm (beam) that should be in the case beam and the crossbeam of setting up is in order to apply transverse prestress; Cast-in-place bridge deck, leveling layer on crossbeam at last, its sequence of construction is with reference to the sequence of construction of crossbeam; When the case beam of single rope face low-pylon cable-stayed bridge adopts steel case beam, set up gooseneck between the steel case beam of two single rope face low-pylon cable-stayed bridges, adopt the bolt weldering to be connected between steel case beam and gooseneck.
Implement the double combined low-pylon cable-stayed bridge by following concrete steps:
(1) according to double combined low-pylon cable-stayed bridge scheme, namely two rope face wide cut low-pylon cable-stayed bridge disposable integrals are planned and are designed plan new (changing) and build highway (or city) bridge;
(2) for the newly building bridge engineering, first implement the single rope face low-pylon cable-stayed bridge in the half range bridge of double combined low-pylon cable-stayed bridge, adopt single case three Room (or multicell) case beam, Hanging Basket cantilever method or the construction of prefabricated cantilever method, the other half range bridge of double combined low-pylon cable-stayed bridge is implemented according to needs built by separate periods such as traffic volume growths;
(3) for the old bridge reconstruction and extension project, first single rope face low-pylon cable-stayed bridge in the half range bridge of old bridge one side enforcement double combined low-pylon cable-stayed bridge, adopt single case three Room (or multicell) case beam, Hanging Basket cantilever method or the construction of prefabricated cantilever method, remove again old bridge after it becomes the bridge open to traffic;
(4) according to the needs of widening bridge, widen the single rope face low-pylon cable-stayed bridge in the another half range bridge of implementing the double combined low-pylon cable-stayed bridge, adopt equally single case three Room (or multicell) case beam, Hanging Basket cantilever method or the construction of prefabricated cantilever method;
(5) implement connecting cross beam between two casees beams, adopt the construction of the cast-in-place method of suspension bracket or prefabricated Method for Installation, complete by the conversion of single rope face low-pylon cable-stayed bridge structure to the bridge construction stress system of two rope faces (wide cut) low-pylon cable-stayed bridge structure;
(6) adopt support formwork cast-in-situ steel reinforced concrete bridge deck, leveling layer and making bridge floor on completed connecting cross beam, two single rope face low-pylon cable-stayed bridges of time phasing are combined into two rope face (wide cut) low-pylon cable-stayed bridge.
205 canal, Hangzhoupro, western circle highway capital, Huai’an, the national highway Jiangsu Province grand bridges of take carry out Two bors d's oeuveres as example, establish two-way 8 tracks in the middle of double tower, slow lane and pavement are established in the double tower outside, the cross section of its double combined wide cut low-pylon cable-stayed bridge consists of: 7.50 meters+side of the 5.00 meters+slow lane in 0.50 meter+pavement of railing is divided and is with 12.50 meters of (0.75 meter of 3.75 meters * 3+side trip of 0.50 meter+runway of side trip)+BRT8.00 rice+fast traffic lanes, bus rapid transit road, 12.50 meters of 2.50 meters (0.50 meter of the 1.50 meters+guardrail in 0.50 meter+Sarasota of guardrail district)+fast traffic lanes (0.50 meter of 3.75 meters * 3+side trip of 0.75 meter+runway of side trip)+side to divide to be with 0.50 meter, 2.50 meters (0.50 meter of the 1.50 meters+guardrail in 0.50 meter+Sarasota of guardrail district)+5.00 meters+railings in 7.50 meters+pavement of slow lane.64.00 meters of bridge floor beam overalls.
Claims (10)
1. double combined low-pylon cable-stayed bridge is characterized in that: this double combined low-pylon cable-stayed bridge carries out Two bors d's oeuveres by single rope face low-pylon cable-stayed bridge and widens and form; Namely first with a single rope face low-pylon cable-stayed bridge Cheng Qiaohou, again another adjacent single rope face low-pylon cable-stayed bridge being carried out main body according to the construction sequential closes up, then between the case beam of two single rope face low-pylon cable-stayed bridges, crossbeam is set it is rigidly connected, last cast-in-place bridge deck, leveling layer and making bridge floor; For newly-built double combined low-pylon cable-stayed bridge, its job practices is first to build a single rope face low-pylon cable-stayed bridge as the half range of new bridge, build again another single rope face low-pylon cable-stayed bridge as the another half range of new bridge, at last two single rope face low-pylon cable-stayed bridge splicings are become the double combined low-pylon cable-stayed bridge of Shuan Suomian (wide cut); For the old bridge reorganization and expansion is become the double combined low-pylon cable-stayed bridge, its job practices is first to build a single rope face low-pylon cable-stayed bridge as the half range of new bridge in old bridge one side, after it becomes the bridge open to traffic, remove again old bridge and build another single rope face low-pylon cable-stayed bridge as the another half range of new bridge, at last two single rope face low-pylon cable-stayed bridge splicings are become the double combined low-pylon cable-stayed bridge of Shuan Suomian (wide cut).
2. double combined low-pylon cable-stayed bridge according to claim 1, it is characterized in that: the structural system of single rope face low-pylon cable-stayed bridge adopts tower beam consolidation, tower pier separation system, Dun Ding below tower and beam arranges pot bearing, selects prestressed concrete box girder or steel case beam.
3. double combined low-pylon cable-stayed bridge according to claim 1, it is characterized in that: the splicing between two single rope face low-pylon cable-stayed bridges adopts the steel concrete crossbeam to be rigidly connected, also can take prestressed concrete box girder as crossbeam, namely set up crossbeam between the case beam of two single rope face low-pylon cable-stayed bridges, draw diaphragm (beam), pier head piece, end floor beam in the case beam to be rigidly connected with suspension cable.
4. double combined low-pylon cable-stayed bridge according to claim 3, it is characterized in that described horizontally-spliced step is as follows: when the case beam of single rope face low-pylon cable-stayed bridge adopts prestressed concrete box girder, pier head piece at single rope face low-pylon cable-stayed bridge, end floor beam and all suspension cables hang the side of widening of the diaphragm (beam) in the case beam that draws and preset lap joint, set up crossbeam between the case beam of two single rope face low-pylon cable-stayed bridges, the prefabricated installation of crossbeam and cast-in-place wet joint or cast-in-site of bracket, the pier head piece of crossbeam and single rope face low-pylon cable-stayed bridge, end floor beam and all suspension cables hang to be set up the steel concrete crossbeam between diaphragm (beam) in the case beam that draws and is rigidly connected, also can adopt prestressed concrete box girder to be rigidly connected as crossbeam, its sequence of construction is the same with the sequence of construction of girder case beam, first implement and No. 0 beam of the pier No. 0 corresponding crossbeam of piece case beam in top, after symmetrical enforcement and No. 1 (1 ˊ), No. 2 (2 '), No. 3 (3 ') piece case beams successively ... corresponding crossbeam, when adopting prestressed concrete box girder as connecting cross beam, preset prestress pipe in diaphragm (beam) that should be in the case beam and the crossbeam of setting up, in order to apply transverse prestress, cast-in-place bridge deck, leveling layer on crossbeam at last, its sequence of construction is with reference to the sequence of construction of crossbeam, when the case beam of single rope face low-pylon cable-stayed bridge adopts steel case beam, set up gooseneck between the steel case beam of two single rope face low-pylon cable-stayed bridges, adopt the bolt weldering to be connected between steel case beam and gooseneck.
5. double combined low-pylon cable-stayed bridge according to claim 4 is characterized in that: adopt two case beams to add the crossbeam combined system, thereby form integral type section, consisted of the Space Beam lattice pattern of " two case beams+in virtual longeron (bridge deck)+crossbeam ".
6. double combined low-pylon cable-stayed bridge according to claim 4, it is characterized in that: the bridge deck width of double combined low-pylon cable-stayed bridge is regulated with the length of the crossbeam of setting up between two casees beams, makes two rope face wide cut low-pylon cable-stayed bridges.
7. double combined low-pylon cable-stayed bridge according to claim 4, it is characterized in that: after between two single rope face low-pylon cable-stayed bridges, employing is rigidly connected and splices, single rope face low-pylon cable-stayed bridge structure is converted to two rope face low-pylon cable-stayed bridge structures, girder between two rope faces has been transformed into Space Beam lattice structure stress system by Space Double cantilever construction stress system, according to main beam stress state and the stressed size thereof before and after the stress system conversion, draft each spot size of girder and it is carried out Reinforcement Design and checking computations.
8. double combined low-pylon cable-stayed bridge according to claim 4, it is characterized in that: cast-in-place leveling layer with Two bors d's oeuveres list rope face low-pylon cable-stayed bridge after bridge floor flat slope between the formed pair of rope face be adjusted into 2% two-way horizontal wall inscription, eliminate the vertical error of the case top surface of the beam (splicing side) of two single rope face low-pylon cable-stayed bridges, adopt the cast-in-situ concrete of 10-20 cm thicks.
9. double combined low-pylon cable-stayed bridge according to claim 4, it is characterized in that: the pot bearing of the pile foundation of bridge, pier and pier top comes overall control design or type selecting by two rope faces (wide cut) low-pylon cable-stayed bridge structural behavior, and (or framing) constructed and implemented by stages.
10. double combined low-pylon cable-stayed bridge according to claim 4, it is characterized in that: when adopting steel case beam, when carrying out " two steel case beam+gooseneck " splicing (welding or high-strength bolt connect) construction, maybe when adopting prestressed concrete box girder, when carrying out " two case beam+crossbeam " splicing connection (cast-in-situ steel reinforced concrete crossbeam) construction, all should consider the impact when construction period, traffick was wide on bridge construction construction spelling, the scheme of taking vehicle temporarily to detour and short-term suspends traffic, or take the cast-in-place early strength concrete of crossbeam, spell the duration of wide construction to shorten bridge construction.
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| CN104195946A (en) * | 2014-07-04 | 2014-12-10 | 林同棪国际工程咨询（中国）有限公司 | Staged implementation method of multi-bridge-floor-layer suspension bridge for highway and rail |
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| CN109024319A (en) * | 2018-09-21 | 2018-12-18 | 湖北省交通规划设计院股份有限公司 | A kind of the low-pylon cable-stayed bridge ruggedized construction and construction method of double width continuous rigid frame bridge |
| CN109024319B (en) * | 2018-09-21 | 2023-12-15 | 湖北省交通规划设计院股份有限公司 | Low-tower cable-stayed bridge reinforcing structure of double-amplitude continuous rigid frame bridge and construction method |
| CN110093845A (en) * | 2019-04-17 | 2019-08-06 | 中国公路工程咨询集团有限公司 | A kind of only tower steel box girder stayed-cable bridge and its method of construction of anti-near field macroseism |
| CN112695652A (en) * | 2020-12-17 | 2021-04-23 | 安徽省交通控股集团有限公司 | Web-shaped suspender arch bridge framing construction method for highway reconstruction and extension project |
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