CN104652244B - A kind of Suspension bridge structure for reinforcing PSC Continuous Box Girder Bridge and construction method - Google Patents
A kind of Suspension bridge structure for reinforcing PSC Continuous Box Girder Bridge and construction method Download PDFInfo
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- CN104652244B CN104652244B CN201510052380.8A CN201510052380A CN104652244B CN 104652244 B CN104652244 B CN 104652244B CN 201510052380 A CN201510052380 A CN 201510052380A CN 104652244 B CN104652244 B CN 104652244B
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D11/00—Suspension or cable-stayed bridges
- E01D11/02—Suspension bridges
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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
- E01D19/16—Suspension cables; Cable clamps for suspension cables ; Pre- or post-stressed cables
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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
- E01D22/00—Methods or apparatus for repairing or strengthening existing bridges ; Methods or apparatus for dismantling bridges
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Abstract
The present invention relates to a kind of Suspension bridge structure for reinforcing PSC Continuous Box Girder Bridge and construction method.The ruggedized construction of this invention includes bridge tower, cable and the combination shaped steel being placed on bridge floor centrage, changes PSC continuous bridge force-bearing situation by suspension bridge system, thus improves its bearing capacity.Made on shaped steel anchorage box back plate by attachment means and vertical prestressed reinforcement.Bridge tower is welded on combination shaped steel, connects bridge tower and combination shaped steel by cable, suspension rod.In the present invention, cable is anchored at girder two ends and bridge tower, suspension rod, box beam composition stress system, shared girder dead load and the mobile load such as automobile, crowd.Middle hanger of the present invention provides lifting force upwards to girder, enhances girder bending resistance, shear resistance, reduces girder bending-down deformation, and can suppress the development of crack in main beam.The reinforcement means of this suspension bridge can make raising PSC continuous box girder bridge bearing ability more efficiently, simple, safety and economy.
Description
Technical field
The present invention relates to a kind of Suspension bridge structure for reinforcing PSC Continuous Box Girder Bridge and construction method (PSC: prestressed reinforced concrete), the ruggedized construction of this invention includes bridge tower, cable and the combination shaped steel being placed on bridge floor centrage, change PSC continuous bridge force-bearing situation by suspension bridge system, thus improve its bearing capacity.Made on shaped steel anchorage box back plate by attachment means and vertical prestressed reinforcement.Bridge tower is welded on combination shaped steel, connects bridge tower and combination shaped steel by cable, suspension rod.In the present invention, cable is anchored at girder two ends and bridge tower, suspension rod, box beam composition stress system, shared girder dead load and the mobile load such as automobile, crowd.Middle hanger of the present invention provides lifting force upwards to girder, enhances girder bending resistance, shear resistance, reduces girder bending-down deformation, and can suppress the development of crack in main beam.The reinforcement means of this suspension bridge can make raising PSC continuous box girder bridge bearing ability more efficiently, simple, safety and economy.
Background technology
The main technique methods that bridge carries out strengthening reconstruction the most both at home and abroad is as follows:
1) increasing section method for strengthening: this method, by increasing the cross section of concrete component and increasing arrangement of reinforcement, improves the bearing capacity and stiffness of component.According to reinforcing purpose and the difference of requirement, can reinforcing based on increasing section, it is also possible to be that to increase arrangement of reinforcement be the reinforcing led.Reinforcing need guaranteeing, conjunction old and new concret is good.But this method shortcoming is the most clearly, owing to inevitably increasing dead load in reinforcing, so the large span prestressed concrete Continuous Box Girder Bridge studied for the present invention is not the most applicable.
2) bridge floor plate reinforcement method is thickeied: the method is to cut original bridge deck pavement, again lays a layer concrete or armored concrete strengthening course.This method can repair the floorings disease such as crack, stripping occurred, can increase again the effective depth of original girder, increases the bending resistance of girder, improves the load relieving system of hinged girder, thus improve the bearing capacity of bridge.But this method is owing to adding bridge deadweight, makes dead load moment of flexure increase more, and nevertheless suffers from the restriction of former bridge structure lower edge tensile zone reinforcing bar allowable stress, so reinforcement means is typically only applicable to the tee girder bridge less across footpath or plate-girder.The method is the best similarly for large span prestressed concrete Continuous Box Girder Bridge consolidation effect.
3) beam rib reinforcement method is increased: increase beam rib reinforcement method and be usually used in the reinforcing of T beam, for this kind of bridge, the lower end of beam can be widened, increase cross-sectional area, and set up, in novel concrete cross section, muscle of being advocated.But add dead load after increasing section equally, be not also suitable for large span prestressed concrete Continuous Box Girder Bridge and reinforce.
4) sticking carbon fiber method for strengthening: sticking carbon fiber method for strengthening is to utilize binding agent carbon fibre reinforced composite (CFRP) to be pasted onto beam body concrete surface, when beam body is by the mobile load such as automobile, crowd, carbon fiber and beam body concrete compatible deformation and common stress, thus improve bearing capacity and the rigidity of bridge, serve reinforcement effect.But owing to needing stickup enhancing composite at the bottom of beam in construction, needing worker stands to smear binding agent on support, operation extremely inconvenience, sticking Quality is difficult to be protected.Simultaneously, work is only participated in when bridge is by mobile load owing to strengthening composite, belong to passive stress, when strengthening composite and playing a role, the beam body lower flexure strain being reinforced is the biggest, therefore, in the case of large span prestressed concrete Continuous Box Girder Bridge has occurred and that bigger lower flexure strain, consolidation effect is undesirable.
5) setting up supporting member method for strengthening: when bridge capacity can not meet requirement, but when girder construction is the most intact, in order to improve bearing capacity, can use the method increasing supporting member, the bearing capacity and stiffness of newly-increased component is bigger.Must assure that in construction that the connection between new and old component is reliable so that it is common participation stress effect, this reinforcement means construction period is relatively big to traffic impact, and there is the nonsynchronous problem of new and old member stress.
6) affixing steel plate reinforcement method: utilize epoxy resin series adhesive by steel sticking at the tension side of reinforced concrete structures or weak part, steel plate and original structure thing is made to form overall common stress, improve the bending resistance of works, shear resistance and rigidity, improve the reinforcing bar of original structure thing and the stress state of concrete, limit crack progressing, thus improve bearing capacity and the durability of bridge.Similar to sticking carbon fiber method for strengthening, affixing steel plate reinforcement method also belongs to passive enforcement, is not also suitable for having occurred and that the large span prestressed concrete Continuous Box Girder Bridge of bigger lower flexure strain.
7) external prestressing strengthening method: external prestressing strengthening beam bridge, is a kind of reinforcement means changing the original stress of beam body.When bridge structure Lack of support or need improve class of loading time can be considered as external prestressing strengthening method.This method is to be applied with prestressed reinforcing bar or steel tendon in beam body disposed outside, to improve the force-bearing situation of bridge.This method generally requires at beam body prestressed anchor, and beam body is produced damage；There is the probability transfinited in the most excessive compressive stress, causes potential safety hazard.
8) bridge system method for strengthening is changed: this reinforcement means is to be reduced girder internal stress by change bridge, improved bearing capacity.As set up support or bridge pier under simply supported beam；It is connected to become continuous beam across simply supported beam by adjacent two.The construction of this reinforcement means often to set up bridge pier in operation under bridge, thus takies under-clearance, affect traffic or bridge flood discharge.This reinforcing mode effect is preferable, is the common measures taken solving the overweight car of temporary traffic the most both at home and abroad.After loaded vehicle is current, then remove interim bridge pier or support.Reinforcement means in the present invention just belongs to this method.
9) anchor spraying concrete method for strengthening: anchor spraying concrete method for strengthening is to utilize mechanical injection high pressure, concrete at a high speed to the bar-mat reinforcement anchored so that it is setting and hardening forms reinforced concrete structure, increases former bridge structure strength and stiffness.But this kind of reinforcement means uses more in mortar flag stone Arch Bridges Strengthening, can preferably solve stone arch bridge Common Diseases.
China's road Traffic Volume rapidly increases with socioeconomic development；Meanwhile, in conventional specification, design load standard value is relatively low causes a large amount of load carrying capacity of bridge relative deficiency, there is the potential safety hazard that can not be ignored.Situation about still having several drawbacks when improving large span prestressed concrete continuous box girder bridge bearing ability for current conventional bridge reinforcing method, the present invention is with existing large span prestressed concrete box girder bridge as object of study, collect and analyze bridge defect and the design defect causing its Lack of support, design a kind of Suspension bridge structure for reinforcing PSC Continuous Box Girder Bridge and construction method, make raising PSC continuous box girder bridge bearing ability more efficiently, simple, safety and economy.
Summary of the invention
It is an object of the invention to improve and reinforce PSC Continuous Box Girder Bridge benefit, design a kind of Suspension bridge structure for reinforcing PSC Continuous Box Girder Bridge and construction method, the following structural features of the present invention:
The reinforcement principle of Suspension bridge structure:
Together with box beam top board 1 and combination shaped steel 2 are anchored at by attachment means 29 and vertical prestressed reinforcement 3, cable 4, suspension rod 5 connects bridge tower 6 and combination shaped steel 2, bridge tower 6 is welded on combination shaped steel 2, cable 4 is anchored at box beam 17 two ends, suspension rod 5 provides vertical lifting force to combination shaped steel 2, due to anchorage effect, box beam top board 1 is by vertical lifting power, cable saddle 7 is arranged in the top of bridge tower 6, cable 4 turns at cable saddle 7, cable saddle 7 and bridge tower 6 are applied pressure, bridge tower 6 transfers the force to the combination shaped steel 2 above bridge pier, combination shaped steel 2 delivers load to No. 0 block 8 of box beam again, No. 0 block 8 of box beam bears active force and passes to central bearing point bearing 9, then it is transferred to ground by bridge pier 10 and basis 11.So structure of design makes girder receive lifting force upwards, serves the effect actively reinforced, thus strengthens PSC continuous box girder bridge girder bending resistance, shear resistance, reduces girder bending-down deformation, and can suppress the development of crack in main beam.
Suspension bridge structure includes:
Box beam top board 1, combination shaped steel 2, vertical prestressed reinforcement 3, cable 4, suspension rod 5, bridge tower 6, cable saddle 7, No. 0 block 8 of box beam, central bearing point bearing 9, bridge pier 10, basis 11, boring A12, U-loop 13, dissipate cable saddle 14, anchoring face 15, chamber 16, box beam 17, boring B18, vertically steel plate 19, lower horizontal steel plate 20, upper horizontal steel plate 21, U-loop bolt 22, cord clip 23, contiguous block bolt 24, contiguous block 25, bolt 26 on cord clip, main rope 27, bolt 28 under cord clip, attachment means 29.
Before reinforcing, box beam 17 acts on bridge pier 10, and bridge pier 10 acts on basis 11, and basis 11 acts on ground, and box beam 17, bridge pier 10 and basis 11 form the three stride continuous box girder bridge of standard.
Combination shaped steel 2 is welded by vertical steel plate 19, lower horizontal steel plate 20, upper horizontal steel plate 21, contiguous block 25.Box beam 17 is PSC material structure.If using machinery to get dry hole B18, attachment means 29 and vertical prestressed reinforcement 3 on lower horizontal steel plate 20 to connect, and combination shaped steel 2 is made to be anchored on box beam top board 1 by attachment means 29.
Bridge tower 6 is welded on combination shaped steel 2, and cable saddle 7 is installed on bridge tower 6 top.Cable 4 turns at cable saddle 7, makes bridge tower 6 be in pressured state.
Cable 4 is made up of many main ropes 27, and cable 4, at the two ends of box beam 17, is load-carrying members main in the present invention.Some cord clips 23 are installed on cable 4, make cord clip 23 be fixed on cable 4 by bolt 28 under bolt on cord clip 26, cord clip.U-loop bolt 22 is utilized to connect U-loop 13 and cord clip 23.Contiguous block bolt 24 connects suspension rod 5 and contiguous block 25.
According to the architectural feature of above invention, its construction method is as follows:
On the standard three stride continuous box girder bridge of box beam 17, bridge pier 10 and basis 11 composition, process combination shaped steel 2 and upper horizontal steel plate 21 by Fig. 7, wherein go up horizontal steel plate 21 and be ultimately welded onto on combination shaped steel 2 in construction.Boring A12 is got at combination shaped steel 2 design attitude.Utilizing attachment means 29 to connect vertical prestressed reinforcement 3, after bridge floor centrage arrangement combinations shaped steel 2, combination shaped steel 2 is anchored on box beam top board 1 by recycling attachment means 29.
Processing bridge tower 6 sections, on-the-spot splicing welding bridge tower 6 sections also installs cable saddle 7.Utilize hoist engine, pulley to promote and install, adjust cable 4.All cord clips 23 are installed in designed position, are connected with contiguous block 25 after U-loop 13 and suspension rod 5 are installed.Adjust each steeve tension according to bridge specific constructive form and degree of disease, make bridge be in good stress.Finally install, weld horizontal steel plate 21, and all steel beam column are carried out antirust treatment.
Beneficial effects of the present invention:
The present invention is a kind of Suspension bridge structure for reinforcing PSC Continuous Box Girder Bridge and construction method, by combination shaped steel, cable, bridge tower, the suspension rod reinforcement effect to PSC Continuous Box Girder Bridge, Continuous Box Girder Bridge is made to have reached the effect actively reinforced, overcome tradition reinforcement means consolidation effect poor, to shortcomings such as the breakage of former bridge structure local location are big, girder bending resistance, shear resistance can be effectively improved, reduce girder bending-down deformation, and suppress the development of crack in main beam.
The machinery, the material that relate in the present invention are extremely widespread in bridge construction, make the practicality of this reinforcement means be guaranteed.Bridge tower, the combination processing that is prefabricated in the factory such as shaped steel, anchor block, suspension rod, on-site consolidation, crudy can be protected, and can effective reduction of erection time.Construction area mainly, in deck centre dividing strip region, occupies little space, and uninterrupted traffic is little to traffic impact, it is adaptable to the bridge strengthening that traffic task amount is big.
Accompanying drawing explanation
Fig. 1 reinforce first three across PSC Continuous Box Girder Bridge along bridge to sectional structural map；
Suspension bridge system bridge elevation after Fig. 2 reinforcing；
Suspension bridge system bridge 1/2 elevation after Fig. 3 reinforcing；
Fig. 4 reinforces front box beam cross-sectional view；
Box beam cross-sectional view after Fig. 5 reinforcing；
Fig. 6 bridge tower direction across bridge layout drawing；
Fig. 7 combines shaped steel figure；
One of Fig. 8 a suspension rod and cord clip detail drawing；Fig. 8 b suspension rod and the two of cord clip detail drawing；
Fig. 8 c suspension rod and the three of cord clip detail drawing；
Fig. 9 bridge strengthening forward and backward stress sketch, wherein
A) continuous bridge elevation
B) continuous bridge Gravitative Loads lower stress figure
C) bending moment diagram (unit: kN m) under continuous bridge Gravitative Loads
D) suspension bridge system is become after reinforcing by lifting force upwards
E) bending moment diagram (unit: kN m) under suspension bridge system Gravitative Loads is become after reinforcing
Box beam top board 1, combination shaped steel 2, vertical prestressed reinforcement 3, cable 4, suspension rod 5, bridge tower 6, cable saddle 7, No. 0 block 8 of box beam, central bearing point bearing 9, bridge pier 10, basis 11, boring A12, U-loop 13, dissipate cable saddle 14, anchoring face 15, chamber 16, box beam 17, boring B18, vertically steel plate 19, lower horizontal steel plate 20, upper horizontal steel plate 21, U-loop bolt 22, cord clip 23, contiguous block bolt 24, contiguous block 25, bolt 26 on cord clip, main rope 27, bolt 28 under cord clip, attachment means 29.
Detailed description of the invention
With detailed description of the invention, the present invention is further described below in conjunction with the accompanying drawings；
Utilize above-mentioned design a kind of Suspension bridge structure for reinforcing PSC Continuous Box Girder Bridge and construction method, specifically comprise the following steps that
Step one: inspection information actual measurement obtain bridge structure, disease conditions, exploration obtains the bearing capacity size that pre-reinforcement bridge needs to improve, it is used for obtaining the stressing conditions of bridge tower, cable, combination shaped steel, suspension rod, vertical prestressed reinforcement etc., thereby determines that the required number of each parts, size, steel grade and concrete deployment scenarios.
Step 2: determined hanger erection order and each pulling force by the stressing conditions obtained in step one and bridge tower, cable, the version of combination shaped steel.
Step 3: consider job site mechanical work ability according to step in the lump, by components such as factory process bridge tower (sections), combinations shaped steel (sections).Boring size is determined by attachment means size.In single combination shaped steel segmental length, lower horizontal steel plate 20 is got several boring A12.Cutting bridge floor centerline deck paving, expose vertical prestressed reinforcement 3, utilize attachment means 29 to connect vertical prestressed reinforcement 3, after bridge floor centrage arrangement combinations shaped steel 2, combination shaped steel 2 is anchored on box beam top board 1 by recycling attachment means 29.
Step 4: section is installed section by section, welding bridge tower sections extremely combines on shaped steel 2.On bridge tower, installation floater makees platform simultaneously, provides convenient during for installing cable.Strict control splicing accuracy and welding quality in construction.For reduction temperature to assembled, the harmful effect of welding quality, the euthermic time period should be selected to construct.
Step 5: install cable saddle 7 on bridge tower 6.Cat road it is installed according to tradition galvanized wire for suspension bridge erection method and sets up cable 4, holing at box beam top board 1, make cable 4 enter chamber 16, installing in chamber 16 and dissipate cable saddle 14, and utilize anchoring face 15 to anchor cable 4.Cord clip 23 is installed, and connects cord clip 23 and the contiguous block 25 being welded on combination shaped steel 2 with suspension rod 5.
Step 6: reinforcing process Bridge structural system changes, causes bridge structure internal force generation redistribution, it is therefore desirable to adjust steeve tension.According to step 2, by design requirement, suspension rod is installed, and adjusts steeve tension.The pulling force correctness of suspension rod is the important factor in order of consolidation effect, needs reliable method to measure the pulling force of each stage suspension rod, if any deviation, should adjust in time, so as not to unfavorable to bridge.
Step 7: upper horizontal steel plate 21 (sections) gets boring B18 in the place that suspension rod passes, and welds after splicing it.All steel beam column are carried out anticorrosion, antirust treatment, then continuous bridge has been reinforced.
The present invention uses suspension bridge system carry out the reinforcing of continuous bridge, bridge is applied lifting force straight up.Stress in the present invention is described as follows, and wherein bridge span takes 60m+90m+90m, and bridge is from refetching q=600kN/m, and often place's lifting force all takes 1500kN.
Forward and backward stress contrast table (unit: kN m) reinforced by table 1
| End bay M | Central bearing point | In across | |
| Before reinforcing | 118846 | -363461 | 244038 |
| After reinforcing | 95389 | -227948 | 169551 |
| After reinforcing/reinforce before | 80.3% | 62.7% | 69.5% |
Sum up: contrasted table from stress sketch and stress, reinforce axle casing internal force under Gravitative Loads and substantially reduce, bridge can be carried out " Reduction of Students' Study Load ", illustrate that the reinforcement means effect in the present invention is obvious.
The above, it it is only presently preferred embodiments of the present invention, not the present invention is done any pro forma restriction, any without departing from technical solution of the present invention content, the technical spirit of the foundation present invention, to any simple modification made for any of the above embodiments, equivalent variations and modification, all still falls within the range of technical solution of the present invention.
Claims (3)
- null1. the Suspension bridge structure being used for reinforcing PSC Continuous Box Girder Bridge，It is characterized in that: include box beam top board (1)、Combination shaped steel (2)、Vertical prestressed reinforcement (3)、Cable (4)、Suspension rod (5)、Bridge tower (6)、Cable saddle (7)、No. 0 block (8) of box beam、Central bearing point bearing (9)、Bridge pier (10)、Basis (11)、Boring A (12)、U-loop (13)、Dissipate cable saddle (14)、Anchoring face (15)、Chamber (16)、Box beam (17)、Boring B (18)、Vertically steel plate (19)、Lower horizontal steel plate (20)、Upper horizontal steel plate (21)、U-loop bolt (22)、Cord clip (23)、Contiguous block bolt (24)、Contiguous block (25)、Bolt (26) on cord clip、Main rope (27)、Bolt (28) and attachment means (29) under cord clip；Before reinforcing, box beam (17) acts on bridge pier (10), bridge pier (10) acts on basis (11), basis (11) acts on ground, and box beam (17), bridge pier (10) and basis (11) form Continuous Box Girder Bridge；Combination shaped steel (2) is welded by vertical steel plate (19), lower horizontal steel plate (20), upper horizontal steel plate (21), contiguous block (25)；Use machinery at lower horizontal steel plate (20) if on get dry hole B (18), attachment means (29) and vertical prestressed reinforcement (3) connect, and make combination shaped steel (2) be anchored on box beam top board (1) by attachment means (29)；Bridge tower (6) is welded in combination shaped steel (2), and cable saddle (7) is installed on bridge tower (6) top；Cable (4) turns at cable saddle (7) place, makes bridge tower (6) be in pressured state；Cable (4) is made up of many main ropes (27), and cable (4) is at the two ends of box beam (17)；Cord clip (23) is installed on cable (4), makes cord clip (23) be fixed on cable (4) by bolt (28) under bolt on cord clip (26), cord clip；U-loop bolt (22) is utilized to connect U-loop (13) and cord clip (23)；Contiguous block bolt (24) connects suspension rod (5) and contiguous block (25).
- The construction method of a kind of Suspension bridge structure for reinforcing PSC Continuous Box Girder Bridge the most according to claim 1, it is characterised in that step is as follows:Step one: inspection information actual measurement obtain bridge structure, disease conditions, exploration obtains the bearing capacity size that pre-reinforcement bridge needs to improve, it is used for obtaining bridge tower, cable, combination shaped steel, suspension rod, the stressing conditions of vertical prestressed reinforcement, thereby determines that the required number of each parts, size, steel grade and concrete deployment scenarios；Step 2: determined hanger erection order and each pulling force by the stressing conditions obtained in step one and bridge tower, cable, the version of combination shaped steel；Step 3: consider job site mechanical work ability according to step in the lump, by factory process bridge tower, combined steel beam column；Boring size is determined by attachment means size；In single combination shaped steel segmental length, lower horizontal steel plate (20) is got several boring A (12)；Cut bridge floor centerline deck paving, expose vertical prestressed reinforcement (3), attachment means (29) is utilized to connect vertical prestressed reinforcement (3), after bridge floor centrage arrangement combinations shaped steel (2), combination shaped steel (2) is anchored on box beam top board (1) by recycling attachment means (29)；Step 4: section is installed, welded bridge tower sections to combining on shaped steel (2) section by section；On bridge tower, installation floater makees platform simultaneously, provides convenient during for installing cable；Step 5: install cable saddle (7) on bridge tower (6)；Cat road is installed according to tradition galvanized wire for suspension bridge erection method and sets up cable (4), hole at box beam top board (1), cable (4) is made to enter chamber (16), install in chamber (16) and dissipate cable saddle (14), and utilize anchoring face (15) anchoring cable (4)；Cord clip (23) is installed, and connects cord clip (23) and the contiguous block (25) being welded in combination shaped steel (2) with suspension rod (5)；Step 6: install suspension rod by design requirement, and adjust steeve tension；Step 7: upper horizontal steel plate (21) gets boring B (18) in the place that suspension rod passes, and welds after splicing it；All steel beam column are carried out anticorrosion, antirust treatment, then continuous bridge has been reinforced.
- A kind of Suspension bridge structure for reinforcing PSC Continuous Box Girder Bridge the most according to claim 1, it is characterized in that: its except be applicable to standard three across and PSC Continuous Box Girder Bridge for single box double room in addition to, be also suitable for and include: two bridge, three bridge, the spanning type of multispan beam and single box single chamber, single box double room, single-box multi-cell, many casees multicell chamber type between be combined into the PSC Continuous Box Girder Bridge of each class formation.
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| CN106906751B (en) * | 2017-04-25 | 2019-01-11 | 中铁四局集团有限公司 | Especially big Cable stayed Bridge Main Tower segmental arc vertical prestressing construction method |
| CN110130202B (en) * | 2019-04-30 | 2024-02-09 | 饶诗维 | Flexible system railway bridge adopting arch rib to stabilize vertical deflection and construction method thereof |
| CN111254803A (en) * | 2020-01-22 | 2020-06-09 | 中铁大桥科学研究院有限公司 | Cable-free area linear control method for three-span continuous steel box girder suspension bridge |
| CN111455862B (en) * | 2020-04-30 | 2022-03-25 | 中铁大桥科学研究院有限公司 | Construction method of continuous stiffening beam suspension bridge |
| CN114541283A (en) * | 2022-01-18 | 2022-05-27 | 山东省交通规划设计院集团有限公司 | Structure and method for solving continuous downwarping problem of large-span PC beam bridge |
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| JPH09111716A (en) * | 1995-10-16 | 1997-04-28 | Kawada Kogyo Kk | Suspension bridge eccentrically loading during storm |
| JPH11323837A (en) * | 1998-05-08 | 1999-11-26 | Shinko Kosen Kogyo Kk | Reinforcing method of structure |
| FR2830548B1 (en) * | 2001-10-04 | 2004-06-18 | Andre Marc Reimbert | STRENGTHENING OF SUSPENDED BRIDGES |
| CN202450450U (en) * | 2012-02-17 | 2012-09-26 | 中交第一公路勘察设计研究院有限公司 | Reinforcement and reconstruction structure of suspension bridge |
| CN104233962A (en) * | 2014-08-11 | 2014-12-24 | 王双其 | Method for reinforcing and strengthening main cable of suspension bridge |
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