CN104652293A - Cable-stayed bridge structure used for reinforcing PSC (Pre-stressed Concrete) continuous box girder bridge and construction method - Google Patents
Cable-stayed bridge structure used for reinforcing PSC (Pre-stressed Concrete) continuous box girder bridge and construction method Download PDFInfo
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- CN104652293A CN104652293A CN201510052378.0A CN201510052378A CN104652293A CN 104652293 A CN104652293 A CN 104652293A CN 201510052378 A CN201510052378 A CN 201510052378A CN 104652293 A CN104652293 A CN 104652293A
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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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- 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
Abstract
The invention refers to a cable-stayed bridge structure used for reinforcing a PSC (Pre-stressed Concrete) continuous box girder bridge and a construction method. The structure comprises a bridge tower, an inhaul cable and built-up steel placed on a center line of a bridge deck, wherein the stress state of the PSC continuous beam bridge is changed through a cable-stayed bridge system, so as to improve the carrying capacity. The built-up steel is anchored on a top plate of the box girder through the connecting device. A bridge tower is welded on the built-up steel, and the bridge tower and the built-up steel are connected by the inhaul cable. In the traditional cable-stayed bridge, the girder in the mid-span no cable area is under a great axial tension, while the girder at the root of the bridge tower is under a great axial tension. According to the cable-stayed bridge structure used for reinforcing the PSC continuous box girder bridge and the construction method, disclosed by the invention, the built-up steel is anchored on the girder and the built-up steel is connected by the inhaul cable, excessive axial tension and stress act on the built-up steel without adverse effect to the girder, while the built-up steel provides upwards lifting power to the girder under the acting force of the inhaul cable, so that the bending resistance and shear-bearing capacity of the girder are enhanced, the sagging deformation of the girder is reduced and the development of the cracks in the girder can be restrained. The cable-stayed bridge structure is efficient, simple, safe and economic.
Description
Technical field
The present invention relates to a kind of Cable-Stayed Bridge Structure for reinforcing PSC Continuous Box Girder Bridge and construction method (PSC: prestressed reinforced concrete), the ruggedized construction of this invention comprises bridge tower, drag-line and is placed on the combination shaped steel on bridge floor center line, change PSC continuous girder bridge force-bearing situation by cable-stayed bridge system, thus improve its supporting capacity.Made on shaped steel anchorage box back plate by linkage.Bridge tower is welded on combination shaped steel, connects bridge tower and combination shaped steel by drag-line.Tradition cable stayed bridge in, in be subject to very large axial tension across span centre cordless region girder; And bridge tower root girder is subject to very large axial tension.Excessive pulling force, pressure all have a negative impact to girder.In the present invention, combination shaped steel is anchored on girder, and with drag-line Connecting groups mould assembly steel, axial tension excessive like this, pressure all act on combination shaped steel, girder is had no adverse effect, and combine shaped steel provide lifting force upwards to girder under drag-line active force, enhance girder bending resistance, shear resistance, reduce girder bending-down distortion, and the development of crack in main beam can be suppressed.The reinforcement means of this cable stayed bridge can make that raising PSC continuous box girder bridge bearing ability is more efficient, simple, safety and economy.
Background technology
It is domestic and international at present that to carry out the main technique methods of strengthening reconstruction to bridge as follows:
1) increasing section reinforcing method: 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 the difference of reinforcing object and requirement, can increasing section be main reinforcing, also can be increase arrangement of reinforcement for main reinforcing.Need guarantee in reinforcing that conjunction old and new concret is good.But this method shortcoming also clearly, in reinforcing, inevitably increase dead load, so the large span prestressed concrete Continuous Box Girder Bridge studied for the present invention is not very applicable.
2) bridge floor plate reinforcement method is thickeied: the method cuts original bridge deck pavement, again lays a layer concrete or steel concrete strengthening course.This method can repair the bridge deck having occurred the disease such as crack, stripping, can increase again the effective height of original girder, increases the bending resistance of girder, improves the load relieving system of hinged girder, thus improves the supporting capacity of bridge.But this method, owing to adding bridge deadweight, makes dead load moment of flexure increase more, and is still subject to the restriction of former bridge construction lower edge tensile zone reinforcing bar allowable stress, so reinforcement means is generally only applicable to across the less tee girder bridge in footpath or plate-girder.The method is not good for large span prestressed concrete Continuous Box Girder Bridge consolidation effect equally.
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 muscle of being advocated in as placed concrete cross section.But add dead load equally after increasing section, be not also suitable for large span prestressed concrete Continuous Box Girder Bridge and reinforce.
4) sticking carbon fiber reinforcing method: sticking carbon fiber reinforcing method utilizes cementing agent carbon fibre reinforced composite (CFRP) to be pasted onto beam body concrete surface, when beam body is subject to the mobile load such as automobile, crowd, carbon fiber and beam body concrete compatible deformation and jointly stressed, thus improve supporting capacity and the rigidity of bridge, serve reinforcement effect.But owing to needing in construction to paste at the bottom of reinforced composite to beam, need worker stands to smear cementing agent on support, operation is inconvenience very, and sticking Quality is difficult to be protected.Simultaneously, because reinforced composite only participates in work when bridge is subject to mobile load, belong to passive stressed, when reinforced composite plays a role, the beam body lower flexure strain be reinforced is often larger, therefore, when larger lower flexure strain has occurred large span prestressed concrete Continuous Box Girder Bridge, consolidation effect is undesirable.
5) setting up supporting member reinforcing method: when bridge capacity can not meet the demands, but when girder construction is substantially intact, in order to improve bearing capacity, can adopt the method increasing supporting member, the bearing capacity and stiffness of newly-increased component is larger.Must guarantee in construction that the connection between new and old component is reliable, make it jointly participate in stressed effect, this reinforcement means construction period is comparatively large 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 entirety jointly stressed, improve the bending resistance of works, shear resistance and rigidity, improve the reinforcing bar of original structure thing and concrete stress state, restriction crack progressing, thus the bearing capacity and the durability that improve bridge.Similar to sticking carbon fiber reinforcing method, affixing steel plate reinforcement method belongs to passive enforcement equally, is not also suitable for the large span prestressed concrete Continuous Box Girder Bridge that larger lower flexure strain occurs.
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 construction Lack of support or need can consider when improving class of loading to adopt external prestressing strengthening method.This method arranges in beam external body to be applied with prestressed reinforcing bar or steel tendon, to improve the force-bearing situation of bridge.This method often needs at beam body prestressed anchor device, produces damage to beam body; There is the possibility transfinited in the excessive compressive stress in local, causes potential safety hazard.
8) bridge system reinforcing method is changed: this reinforcement means reduces girder internal stress by changing bridge, improve supporting capacity.As set up support or bridge pier under simply supported beam; Continuous beam is connected to become across simply supported beam by adjacent two.Often to set up bridge pier in operation under bridge in this reinforcement means construction, thus take under-clearance, affect traffic or bridge flood discharge.This reinforcing mode effect is better, is the common measures taken solving the overweight car of temporary traffic at present 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 reinforcing method: anchor spraying concrete reinforcing method utilizes mechanical injection high pressure, concrete at a high speed on the good steel mesh reinforcement of anchoring, makes its setting and hardening form reinforced concrete structure, increase former bridge construction strength and stiffness.But this kind of reinforcement means uses more in mortar flag stone Arch Bridges Strengthening, stone arch bridge Common Diseases can be solved preferably.
China's road Traffic Volume is rapid growth with socioeconomic development; Meanwhile, in specification, design load standard value was relatively low in the past causes a large amount of load carrying capacity of bridge relative deficiency, there is the potential safety hazard that can not be ignored.For the situation that current conventional bridge reinforcing method also comes with some shortcomings when improving large span prestressed concrete continuous box girder bridge bearing ability, the present invention with existing large span prestressed concrete box girder bridge for research object, collect and analyze the bridge defect and design defect that cause its Lack of support, designing a kind of Cable-Stayed Bridge Structure for reinforcing PSC Continuous Box Girder Bridge and construction method, making that raising PSC continuous box girder bridge bearing ability is more efficient, simple, safety and economy.
Summary of the invention
The object of the invention is to improve and reinforce PSC Continuous Box Girder Bridge benefit, designing a kind of Cable-Stayed Bridge Structure for reinforcing PSC Continuous Box Girder Bridge and construction method, following structural features of the present invention:
The reinforcement principle of Cable-Stayed Bridge Structure:
Together with case back plate 1 and combination shaped steel 2 are anchored at by vertical prestressed reinforcement 3 and linkage 10, drag-line 4 connects bridge tower 5 and combination shaped steel 2, bridge tower 5 is welded on combination shaped steel 2, drag-line 4 applies pulling force to combination shaped steel 2, combination shaped steel 2 is made to be subject to axle power and vertical lifting power, due to anchorage effect, case back plate 1 is also subject to vertical lifting power, bridge tower 5 is subject to the pulling force of drag-line 4, bridge tower 5 by force transmission to the combination shaped steel 2 above bridge pier, load is passed to case beam No. 0 block 6 by combination shaped steel 2 again, No. 0 block 6 bears force transmission to central bearing point bearing 7, then ground is passed to by bridge pier 8 and basis 9.Combination shaped steel is subject to axial compression at region AB, CD, in cordless region, BC is subject to axial tension, pressure excessive like this, pulling force are born instead of girder self by combining shaped steel, avoid excessive axle power to the adverse effect of girder, make girder receive lifting force upwards simultaneously.Thus strengthen the bending resistance of PSC continuous box girder bridge girder, shear resistance, reduce girder bending-down distortion, and the development of crack in main beam can be suppressed.
Cable-Stayed Bridge Structure comprises:
Case back plate 1, combination shaped steel 2, vertical prestressed reinforcement 3, drag-line 4, bridge tower 5, No. 0 block 6, central bearing point bearing 7, bridge pier 8, basis 9, linkage 10, first boring 11, steel for wire drawing 12, anchor-hold block 13, baffle plate 14, local strengthening steel plate 15, steel anchor crossbeam 16, bracket 17, steel for wire drawing 18, case beam 19, second boring 20, vertically steel plate 21, lower horizontal steel plate 22, upper horizontal steel plate 23.
Before reinforcing, case beam 19 acts on bridge pier 8, and bridge pier 8 acts on basis 9, and basis 9 acts on ground, and case beam 19, bridge pier 8 and basis 9 form the three stride continuous box girder bridge of standard.
Combination shaped steel 2 is welded by vertical steel plate 21, lower horizontal steel plate 22, upper horizontal steel plate 23, anchor-hold block 13, baffle plate 14, local strengthening steel plate 15.Case beam 19 is PSC material structure.Use machinery to get the first boring 11 on lower horizontal steel plate 22, linkage 10 is connected with vertical prestressed reinforcement 3, and combination shaped steel 2 and the anchoring of case back plate 1 is integrated.
Bridge tower 5 is welded on combination shaped steel 2, and bridge tower 5 is made up of steel anchor crossbeam 16, bracket 17.Steel anchor crossbeam 16 is used for bearing the horizontal force of drag-line 4, and the vertical stress component of drag-line 4 passes to bridge tower 5 by bracket 17, and such structure makes bridge tower 5 be in pressured state as far as possible.The steel anchor crossbeam 16 of such layout and bracket 17 avoid bridge tower and drag-line junction stress excessive and destroy.
Drag-line is made up of drag-line 4, steel for wire drawing 12, steel for wire drawing 18.Drag-line 4 is anchored on combination shaped steel 2 and bridge tower 5 by steel for wire drawing 12, steel for wire drawing 18 respectively.
According to the architectural feature of above invention, its construction method is as follows:
On the standard three stride continuous box girder bridge of case beam 19, bridge pier 8 and basis 9 composition, process combination shaped steel 2 by Fig. 8, wherein go up horizontal steel plate 23 and be finally welded on combination shaped steel 2 in construction.The first boring 11 is got at combination shaped steel 2 design attitude.Utilize linkage 10 to connect vertical prestressed reinforcement 3, after bridge floor center line arrangement combinations shaped steel 2, combination shaped steel 2 is anchored on case back plate 1 by recycling linkage 10.
Processing bridge tower 5 sections, on-the-spot splicing welding bridge tower 5 sections also installs steel anchor crossbeam 16.Utilize hoist engine, pulley promote each drag-line, draw in place to bridge tower duct after, fix with steel for wire drawing 18.Equally beam-ends drag-line is installed, after utilizing each drag-line of jack tension, use steel for wire drawing 12 anchoring.Adjust each Cable power according to bridge construction form and degree of disease, make bridge be in good stress.Finally install, weld horizontal steel plate 23, and antirust treatment is carried out to all steel beam column.
Beneficial effect of the present invention:
The present invention is a kind of Cable-Stayed Bridge Structure for reinforcing PSC Continuous Box Girder Bridge and construction method, by the effect that combination shaped steel, drag-line, bridge tower are reinforced PSC Continuous Box Girder Bridge, Continuous Box Girder Bridge is made to reach the effect of active enforcement, overcome traditional reinforcement means consolidation effect poor, to the damaged shortcoming such as large of former bridge construction local location, can effectively improve girder bending resistance, shear resistance, reduce girder bending-down distortion, and suppress the development of crack in main beam.
The machinery related in the present invention, material are very general in bridge construction, and the practicality of this reinforcement means is guaranteed.Bridge tower, combination shaped steel, steel anchor crossbeam are prefabricated in the factory processing, on-site consolidation, and 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, is applicable to the bridge strengthening that traffic task amount is large.
Accompanying drawing explanation
Fig. 1 reinforce first three across PSC Continuous Box Girder Bridge along bridge to sectional structural map;
Fig. 2 reinforces rear cable-stayed bridge system bridge elevation;
Fig. 3 reinforces rear cable-stayed bridge system bridge 1/2 elevation;
Fig. 4 reinforces front case beam cross-sectional view;
Fig. 5 reinforces rear cabinet beam cross-sectional view;
Fig. 6 combines shaped steel sections elevation (before installing horizontal steel plate);
Fig. 7 combines shaped steel sections graphics;
Fig. 8 bridge tower direction across bridge arrangement diagram.
The forward and backward stressed sketch of Fig. 9 bridge strengthening.
A) continuous girder bridge elevation
B) continuous girder bridge Gravitative Loads lower stress figure
C) bending moment diagram (unit: kNm) under continuous girder bridge Gravitative Loads
D) lifting force that cable-stayed bridge system is subject to upwards is become after reinforcing
E) bending moment diagram (unit: kNm) under cable-stayed bridge system Gravitative Loads is become after reinforcing
Its raising middle flask back plate 1, combination shaped steel 2, vertical prestressed reinforcement 3, drag-line 4, bridge tower 5, No. 0 block 6, central bearing point bearing 7, bridge pier 8, basis 9, linkage 10, first boring 11, steel for wire drawing 12, anchor-hold block 13, baffle plate 14, local strengthening steel plate 15, steel anchor crossbeam 16, bracket 17, steel for wire drawing 18, case beam 19, second boring 20, vertically steel plate 21, lower horizontal steel plate 22, upper horizontal steel plate 23.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is further described;
A kind of Cable-Stayed Bridge Structure for reinforcing PSC Continuous Box Girder Bridge utilizing above-mentioned design and construction method, concrete steps are as follows:
Step one: inspection information also actual measurement obtains bridge structure, disease conditions, exploration obtains the bearing capacity size that pre-reinforcement bridge needs to improve, be used for obtaining the stressing conditions of bridge tower, drag-line, combination shaped steel, linkage, determine the required number of each parts, size, steel grade and concrete deployment scenarios thus.
Step 2: by form of structure determination cable tension order and each the stretching force of the stressing conditions obtained in step one and bridge tower, drag-line, combination shaped steel.
Step 3: consider job site mechanical work ability in the lump according to step, by factory process bridge tower (sections), combination shaped steel (sections), steel anchor crossbeam.Size of holing is determined by linkage size.Lower horizontal steel plate 22 is got several the first boring 11, cut bridge floor centerline deck paving, expose vertical prestressed reinforcement 3, linkage 10 is utilized to connect vertical prestressed reinforcement 3, after bridge floor center line arrangement combinations shaped steel 2, combination shaped steel 2 is anchored on case back plate 1 by recycling linkage 15.
Step 4: section is installed, welded bridge tower sections on combination shaped steel 2 section by section.On bridge tower, installation floater makes platform simultaneously, for providing convenient when installing drag-line.Strict control splicing accuracy and welding quality in construction.For reducing temperature to harmful effect that is assembled, welding quality, the time period of answering selective temperature moderate constructs.
Step 5: install pulley on bridge tower 5, hoist engine promotes drag-line, after in place in traction cable to bridge tower 5 duct in order, with steel for wire drawing 18 anchoring.The drag-line other end is installed on combination shaped steel 2, and with steel for wire drawing 12 anchoring.
Step 6: reinforcing process Bridge structural system changes, causes bridge construction internal force generation distribution again, therefore needs adjustment Cable power.According to step 2, the pulling force of stretch-draw drag-line to each time in order.The Suo Li correctness of drag-line is one of important factor in order of consolidation effect, applies the Suo Li that reliable method measures each stage drag-line, if any deviation, should adjust in time, in order to avoid unfavorable to bridge.
Step 7: upper horizontal steel plate 23 (sections) gets the second boring 20 in the place that drag-line passes, to welding after its splicing.Carry out anticorrosion, antirust treatment to all steel beam column, then continuous girder bridge has been reinforced.
Adopt cable-stayed bridge system to carry out the reinforcing of continuous girder bridge in the present invention, axle power is applied to combination shaped steel, to the lifting force that bridge only applies straight up.Stressed in the present invention is described as follows, and wherein bridge span gets 60m+90m+90m, and bridge, from refetching q=600kN/m, is often located lifting force and all got 1500kN.
Forward and backward stressed contrast table (unit: kNm) reinforced by table 1
| End bay M | Central bearing point | In across | |
| Before reinforcing | 118846 | -363461 | 244038 |
| After reinforcing | 95389 | -227948 | 169551 |
| Before reinforcing rear/reinforcing | 80.3％ | 62.7％ | 69.5％ |
Sum up: from stressed sketch Fig. 9 and stressed contrast table, reinforce axle casing internal force under Gravitative Loads and obviously reduce, can carry out " Reduction of Students' Study Load " bridge, the reinforcement means successful in the present invention is described.
The above, it is only preferred embodiment of the present invention, not any pro forma restriction is done to the present invention, anyly do not depart from technical solution of the present invention content, according to technical spirit of the present invention to any simple modification made for any of the above embodiments, equivalent variations and modification, all still belong in the scope of technical solution of the present invention.
Claims (3)
1. one kind for reinforcing the Cable-Stayed Bridge Structure of PSC Continuous Box Girder Bridge, it is characterized in that: its case back plate (1), combination shaped steel (2), vertical prestressed reinforcement (3), drag-line (4), bridge tower (5), No. 0 block (6), central bearing point bearing (7), bridge pier (8), basis (9), linkage (10), first boring (11), first steel for wire drawing (12), anchor-hold block (13), baffle plate (14), local strengthening steel plate (15), steel anchor crossbeam (16), bracket (17), second steel for wire drawing (18), case beam (19), second boring (20), vertical steel plate (21), lower horizontal steel plate (22), upper horizontal steel plate (23),
Before reinforcing, case beam (19) acts on bridge pier (8), bridge pier (8) acts on basis (9), basis (9) acts on ground, and case beam (19), bridge pier (8) and basis (9) form Continuous Box Girder Bridge;
Combination shaped steel (2) is welded by vertical steel plate (21), lower horizontal steel plate (22), upper horizontal steel plate (23), anchor-hold block (13), baffle plate (14), local strengthening steel plate (15); Machinery is used to get the first boring (11) on lower horizontal steel plate (22), linkage (10) is connected with vertical prestressed reinforcement (3), and will combine shaped steel (2) and case back plate (1) anchoring is integrated;
Combination shaped steel (2) is welded by vertical steel plate (21), lower horizontal steel plate (22), upper horizontal steel plate (23), anchor-hold block (13), baffle plate (14), local strengthening steel plate (15); Machinery is used to get the first boring (11) on lower horizontal steel plate (22), linkage (10) is connected with vertical prestressed reinforcement (3), and will combine shaped steel (2) and case back plate (1) anchoring is integrated;
Bridge tower (5) is welded in combination shaped steel (2), and bridge tower (5) is made up of steel anchor crossbeam (16), bracket (17); Steel anchor crossbeam (16) is used for bearing the horizontal force of drag-line (4), and the vertical stress component of drag-line (4) passes to bridge tower (5) by bracket (17);
Drag-line is made up of drag-line (4), the first steel for wire drawing (12), the second steel for wire drawing (18); First steel for wire drawing (12), the second steel for wire drawing (18) are anchored on combination shaped steel (2) and bridge tower (5) respectively.
2. the construction method of a kind of Cable-Stayed Bridge Structure for reinforcing PSC Continuous Box Girder Bridge according to claim 1, it is characterized in that, construction sequence is as follows:
Step one: inspection information also actual measurement obtains bridge structure, disease conditions, exploration obtains the bearing capacity size that pre-reinforcement bridge needs to improve, be used for obtaining the stressing conditions of bridge tower, drag-line, combination shaped steel, linkage, determine the required number of each parts, size, steel grade and concrete deployment scenarios thus;
Step 2: by form of structure determination cable tension order and each the stretching force of the stressing conditions obtained in step one and bridge tower, drag-line, combination shaped steel;
Step 3: consider job site mechanical work ability in the lump according to step, by factory process bridge tower, combination shaped steel, steel anchor crossbeam; Size of holing is determined by linkage size; Lower horizontal steel plate (22) is got several the first boring (11), cut bridge floor centerline deck paving, expose vertical prestressed reinforcement (3), linkage (10) is utilized to connect vertical prestressed reinforcement (3), after bridge floor center line arrangement combinations shaped steel (2), recycling linkage (15) will combine shaped steel (2) and be anchored on case back plate (1);
Step 4: section being installed, being welded bridge tower sections to combining on shaped steel (2) section by section; On bridge tower, installation floater makes platform simultaneously, for providing convenient when installing drag-line;
Step 5: install pulley on bridge tower (5), hoist engine promotes drag-line, after in place in traction cable to bridge tower (5) duct in order, with the second steel for wire drawing (18) anchoring; The drag-line other end is installed combination shaped steel (2) is upper, and with the first steel for wire drawing (12) anchoring;
Step 6: the pulling force of stretch-draw drag-line to each time in order;
Step 7: upper horizontal steel plate (23) gets the second boring (20) in the place that drag-line passes, to welding after its splicing; Carry out anticorrosion, antirust treatment to all steel beam column, then continuous girder bridge has been reinforced.
3. a kind of Cable-Stayed Bridge Structure for reinforcing PSC Continuous Box Girder Bridge according to claim 1, it is characterized in that: its except be applicable to standard three across and for except the PSC Continuous Box Girder Bridge of single box double room, be also suitable for and comprise: two across the PSC Continuous Box Girder Bridge being combined into each class formation between the case room type of beam, three across the spanning type of beam, multispan beam and single box single chamber, single box double room, single-box multi-cell, many casees multicell.
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| CN106012872A (en) * | 2016-06-28 | 2016-10-12 | 山东大学 | Dorsal-funiculus-free cable-stayed reinforcing system of continuous rigid frame bridge and construction method |
| CN106836028A (en) * | 2017-04-12 | 2017-06-13 | 云南云岭高速公路工程咨询有限公司 | The concrete continuous rigid structure beam bridge and construction method reinforced with steel truss girder jacking |
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| CN105603890A (en) * | 2015-11-16 | 2016-05-25 | 上海应用技术学院 | Extradosed type external cable reinforced girder bridge |
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| CN107268458A (en) * | 2017-06-14 | 2017-10-20 | 沈阳建筑大学 | A kind of double width continuous rigid frame bridge tied arch ruggedized construction and its construction method |
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| CN107119582A (en) * | 2017-06-14 | 2017-09-01 | 沈阳建筑大学 | A kind of T-shaped rigid frame bridge back of the body tower oblique pull ruggedized construction and its construction method |
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| 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 |
| CN113356081A (en) * | 2021-07-15 | 2021-09-07 | 中交一公局集团有限公司 | Bridge incremental launching construction method and bridge precast beam structure |
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