CN214573424U - Bridge deck widening device suitable for central separation strip of highway framing bridge - Google Patents
Bridge deck widening device suitable for central separation strip of highway framing bridge Download PDFInfo
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- CN214573424U CN214573424U CN202120705073.6U CN202120705073U CN214573424U CN 214573424 U CN214573424 U CN 214573424U CN 202120705073 U CN202120705073 U CN 202120705073U CN 214573424 U CN214573424 U CN 214573424U
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Abstract
The utility model discloses a wide device is pieced together to bridge floor suitable for highway framing bridge central separation area, the device includes the prefabricated new girder in left side and the prefabricated new girder in right side, the prefabricated new girder in left side and the existing girder butt joint in highway framing bridge left side, the prefabricated new girder in right side and the existing girder butt joint in highway framing bridge right side, meet through cantilever section connecting elements between the cantilever section of the prefabricated new girder in left side and the cantilever section of the prefabricated new girder in right side, what the prefabricated new girder in left side was mated formation between the layer and the prefabricated new girder in right side mated formation layer through mating formation layer connecting elements and meeting. Adopt width device is pieced together to framing bridge central authorities median bridge floor be favorable to improving the construction speed who reforms and enlarges highway, shorten construction period, reduce to sign and tear work load open, maneuverability is strong, the construction is simple and convenient, has better economic benefits and social.
Description
Technical Field
The utility model relates to a rebuild highway broad width bridge that utilizes, in particular to wide device is pieced together to bridge floor suitable for highway broad width bridge central separation area.
Background
With the continuous improvement of the economic level of China, more and more families have private cars, and when a holiday comes, people choose to drive to travel by themselves, so that the traffic of the bidirectional 4-lane expressway is increased rapidly under the current situation, the road congestion condition is serious, the self-driving experience degree of tourists is reduced, and the promotion effect of the self-driving tour on the development of surrounding economy is slowed down. Therefore, each province traffic administration builds the current jammed bidirectional 4-lane expressway into a bidirectional 8-lane expressway according to actual conditions, and how to widen the bridge floor of the current center separation band of the split bridge is a critical problem worthy of research in certain urban road sections which are limited in regions and can only be widened in a single direction.
At present, in order to realize the broadening of highway framing bridges, the method comprises the following steps: the method comprises the steps of firstly sealing traffic in the construction range of the highway, dismantling an inner guardrail, a pavement layer, two inner main beams and a wet joint, additionally arranging pile foundations and single-column piers in a width-divided bridge gap, prefabricating 3 new main beams according to actual sizes, installing supports and stop blocks on the single-column piers, hoisting the 3 new main beams, pouring concrete wet joints and a diaphragm plate, and finally pouring a bridge deck pavement layer and drawing mark and marked lines. The second method comprises the following steps: after the inner side guardrails and the pavement layer are removed, partial cantilevers of two inner side main beams are chiseled, and original stressed main ribs are exposed; 4. the original stressed main bars are connected by high-strength steel bars, and wet joint steel plates at the bottoms of the main beam cantilevers are embedded in the paving layer.
The problem of doing so is: 1. the single-column pier pile foundation is additionally arranged in the gap of the framing bridge, and the pile spacing easily violates the design specification requirement of the existing pile foundation; 2. the construction of the pile foundation easily disturbs the soil around the existing pier pile foundation pile, so that the vertical bearing capacity of the existing bridge is reduced; 3. the pier stud construction operation surface is small, and the construction organization design difficulty of hoisting a reinforcement cage and pouring concrete is high; 4. the width of the wet joint between the new main beams is small, and the construction quality is difficult to guarantee.
The second problem is that: 1. when a part of the cantilever is chiseled, the girder is easy to generate micro cracks, and the service durability of the girder is reduced; 2. the construction quality of the joint of the new concrete and the old concrete is difficult to ensure, and longitudinal cracks are easy to appear; 3. the original gaps of the separated bridges are directly connected, the cantilever of the main beam is overlong and has smaller rigidity, the cantilever is easy to generate larger vertical deformation during operation, and the potential safety hazard is larger; 4. the bridge floor after the width is pieced together is great in width, easy to appear horizontal crack, the later maintenance engineering volume is big.
In addition, due to the influence of site space, bridge widening design and construction period requirements, the two methods are not strong in operability and inconvenient to construct.
Disclosure of Invention
The utility model aims to solve the technical problem that to prior art not enough, provide a reasonable in design, improve highway and rebuild the engineering construction speed, shorten construction period's the bridge floor that is applicable to highway framing bridge central bank and pieces together wide device.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a bridge deck widening device suitable for a central dividing strip of an expressway bridge is characterized by comprising a left prefabricated new main beam and a right prefabricated new main beam, wherein the left prefabricated new main beam is in butt joint with an existing main beam on the left side of the expressway bridge, the right prefabricated new main beam is in butt joint with an existing main beam on the right side of the expressway bridge, the left prefabricated new main beam and the right prefabricated new main beam are respectively composed of a support section, a cantilever section and a paving layer arranged on the cantilever section, the cantilever section of the left prefabricated new main beam is connected with the cantilever section of the right prefabricated new main beam through a cantilever section connecting component, and the paving layer of the left prefabricated new main beam is connected with the paving layer of the right prefabricated new main beam through a paving layer connecting component;
the cantilever section connecting component comprises a lower cantilever box type structure and an upper cantilever box type structure which are arranged in a vertically staggered manner, the lower cantilever box type structure is fixedly connected with the side surface of the cantilever section of the new prefabricated right main beam, the upper cantilever box type structure is fixedly connected with the side surface of the cantilever section of the new prefabricated left main beam, and a telescopic rubber strip is arranged between the upper cantilever box type structure and the cantilever section of the new prefabricated right main beam;
the layer connecting member of mating formation includes that the left side is mated formation the pre-buried steel sheet in layer and the pre-buried steel sheet in layer of right side mating formation, the layer pre-buried steel sheet of layer and the fixed meeting of cantilever section top surface of the existing girder in left side mating formation in left side, the layer pre-buried steel sheet of layer and the right side mating formation in right side are mated formation and are connected through the fixed steelframe that vertically stretches out and draws back between the layer pre-buried steel sheet, the space between the layer is mated formation in vertical flexible steelframe and left side, the space between the layer is mated formation in vertical flexible steelframe and right side has all filled C40 steel fiber concrete layer, vertical flexible steelframe top is equipped with the pre-buried steel sheet that covers C40 steel fiber concrete layer and can one-way slip.
The utility model discloses the technical problem that will solve can also be realized through following technical scheme the prefabricated new girder in left side corresponds existing diaphragm position and has increased the prefabricated diaphragm in left side, and the prefabricated new girder in right side corresponds existing diaphragm position and has increased the prefabricated diaphragm in right side, meets through the steel diaphragm connecting piece through anticorrosive anti-rust treatment between the prefabricated diaphragm in left side and the prefabricated diaphragm in right side.
The utility model discloses the technical problem that will solve can also be realized through following technical scheme, the steel diaphragm connecting piece is equipped with two connection steel sheet, and connection steel sheet encorbelments the steel sheet through the ordinary bolted connection diaphragm that has dual fail-safe, and the steel sheet of encorbelmenting of diaphragm is fixed on the prefabricated diaphragm plate in right side or the pre-buried steel sheet on the prefabricated diaphragm plate in left side.
The utility model aims to solve the technical problem can also be realized through following technical scheme, the vertical flexible steelframe include with the left side mat formation the fixed vertical shaped steel in left side that meets of the fixed pre-buried steel sheet in layer and mat formation the fixed vertical shaped steel in right side that meets of the pre-buried steel sheet in layer with the right side, be equipped with longitudinal expansion joint between vertical shaped steel in left side and the vertical shaped steel in right side, longitudinal expansion joint department installs first waterproof rubber strip vertical shaped steel in left side and left side mat formation between the pre-buried steel sheet in layer, the welding has the reinforcing steel sheet between vertical shaped steel in right side and the pre-buried steel sheet in layer of right side mat formation.
The utility model discloses the technical problem that will solve can also realize through following technical scheme the cantilever section side of prefabricated new girder has the fixed cantilever section pre-buried steel sheet that meets of box structure or upside cantilever box structure of encorbelmenting with the downside.
The utility model discloses the technical problem that will solve can also realize through following technical scheme, cantilever section pre-buried steel sheet, the left side layer pre-buried steel sheet of mating formation and the right side layer pre-buried steel sheet of mating formation all adopt the bar perforation plug welding.
The utility model discloses the technical problem that will solve can also be realized through following technical scheme, but the downside box structure of encorbelmenting and the box structural rectangle closed reinforcement that is equipped with horizontal bridge two-way movement of upside encorbelment, steel sleeve for the reinforcing bar is connected.
The utility model discloses the technical problem that will solve can also be realized through following technical scheme, be equipped with the wet seam of adjustable width between the cantilever section of the new girder of prefabrication on in right side and the cantilever section of the existing girder in right side, between the cantilever section of the new girder of prefabrication in left side and the cantilever section of the existing girder in left side.
Compared with the prior art, the utility model discloses following technological effect has:
1. the framing bridge with the structure of the utility model effectively utilizes the existing space of the framing bridge in the town road section which is limited by the region and can only be widened in one direction, reduces the sign and disassembly workload of reconstruction and extension projects, and reduces the probability of possible occurrence of deep social contradiction;
2. when two inner main beams are dismantled, a new main beam is prefabricated in parallel in a prefabricating field, so that the time for constructing closed traffic is reduced;
3. the cantilever section is additionally provided with a diaphragm plate for connection, so that the rigidity of the cantilever section of the main beam is improved, and the number of cracks generated at the widened bridge deck due to the load borne during the operation period is reduced;
4. the cantilever section connecting member and the pavement connecting member are both of steel structures subjected to corrosion and rust prevention treatment, so that the weight of the cantilever section of the main beam is reduced and the construction speed is increased while the strength, the rigidity and the durability are ensured;
5. the bridge deck pavement layer is provided with a longitudinal telescopic steel frame with a longitudinal expansion joint, so that the number of cracks generated at the widened bridge deck due to the temperature effect in the operation period is reduced;
6. but set up the pre-buried steel sheet of one-way free movement's of bridge floor on the vertical flexible steelframe, improved the driving comfort level, set up waterproof rubber strip simultaneously, improve the durability in use at vertical expansion joint.
Adopt the framing bridge of structure can utilize the space of existing framing bridge central separation zone effectively, improves highway reconstruction and expansion engineering construction speed, shortens construction period, reduces highway reconstruction and expansion engineering's the work load of removing, practices thrift construction land, and maneuverability is strong, and the construction is simple and convenient, and operation phase safe and reliable has better economic benefits and social.
Drawings
FIG. 1 is a schematic cross-sectional view of a bridge deck widening structure of a framing bridge without a prefabricated diaphragm plate according to the present invention;
FIG. 2 is a schematic cross-sectional view of a bridge deck widening structure of the bridge with prefabricated transverse clapboards of the invention;
FIG. 3 is a structural view of a bridge deck widening device of the central dividing strip;
FIG. 4 is a plan view of a cantilever section box type connecting member;
FIG. 5 is a sectional view taken along line A-A of FIG. 4;
FIG. 6 is a plan view of the paving layer connecting member;
FIG. 7 is a plan view of a steel diaphragm connector;
fig. 8 is a structural view of a deck buried steel plate.
In the figure: 1-cantilever section embedded steel plate, 2-lower side cantilever box type structure, 3-upper side cantilever box type structure, 4-rectangular closed steel bar, 5-telescopic rubber strip, 6-left side pavement layer embedded steel plate or right side pavement layer embedded steel plate, 7-reinforced steel plate, 8-C40 steel fiber concrete layer, 9-left side or right side vertical section steel, 10-first waterproof rubber strip, 11-second waterproof rubber strip, 12, 13-bridge deck embedded steel plate, 14-right side prefabricated new main beam, 15-left side prefabricated new main beam, 16-wet joint, 17-existing main beam, 18-C40 cast-in-place pavement layer, 19-asphalt pavement layer, 20-diaphragm embedded steel plate, 21-cantilever steel plate, 22-connecting steel plate, 23-common bolt, 24-right side prefabricated diaphragm plate or left side prefabricated diaphragm plate, 25-stiffening steel plates of cantilever box type structures, 26-upper steel plates of box type cantilever steel structures and 27-lower steel plates of cantilever box type structures.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
Example 1, referring to fig. 1 to 8, a bridge deck widening apparatus for a central dividing strip of a highway bridge, the device comprises a left-side prefabricated new main beam 15 and a right-side prefabricated new main beam 14, wherein the left-side prefabricated new main beam 15 is in butt joint with an existing main beam 17 on the left side of the highway amplitude-division bridge, the right-side prefabricated new main beam 14 is in butt joint with an existing main beam 17 on the right side of the highway amplitude-division bridge, the left-side prefabricated new main beam 15 and the right-side prefabricated new main beam 14 are both composed of a support section, a cantilever section and a pavement layer arranged on the cantilever section, the pavement layer comprises a C40 cast-in-situ pavement layer 18 and an asphalt pavement layer 19, the cantilever section of the left-side prefabricated new main beam 15 is connected with the cantilever section of the right-side prefabricated new main beam 14 through a cantilever section connecting component, and the pavement layer of the left-side prefabricated new main beam 15 is connected with the pavement layer of the right-side prefabricated new main beam 14 through a pavement layer connecting component;
the cantilever section connecting component comprises a lower cantilever box type structure 2 and an upper cantilever box type structure 3 which are arranged in a vertically staggered manner, the lower cantilever box type structure 2 is fixedly connected with the side surface of the cantilever section of the new prefabricated right main beam 14, the upper cantilever box type structure 3 is fixedly connected with the side surface of the cantilever section of the new prefabricated left main beam 15, and a telescopic rubber strip 5 is arranged between the upper cantilever box type structure 3 and the cantilever section of the new prefabricated right main beam 14; the lower cantilever box-type structure 2 and the upper cantilever box-type structure 3 are provided with an upper steel plate 26, a lower steel plate 27 and a reinforced steel plate 25, and the upper cantilever box-type structure and the lower cantilever box-type structure are connected through a rectangular closed steel bar 4;
the layer connecting member of mating formation includes that the left side is mated formation the layer pre-buried steel sheet 6 and the right side is mated formation the layer pre-buried steel sheet 6, the layer pre-buried steel sheet 6 is mated formation in the left side and the cantilever section top surface of the existing girder 15 in left side is fixed to be met, the layer pre-buried steel sheet 6 is mated formation in the right side and the cantilever section top surface of the existing girder 14 in right side are fixed to be met, the layer pre-buried steel sheet of the layer is mated formation in the left side and the right side is mated formation through the vertical flexible steelframe is fixed to be met, layer 18 is mated formation in vertical flexible steelframe and left side, space between 19, layer 18 is mated formation in vertical flexible steelframe and right side, space between 19 all fills C40 steel fiber concrete layer 8, vertical flexible steelframe top is equipped with the bridge floor pre-buried steel sheet 12 that covers C40 steel fiber concrete layer 8 and can one-way slip, 13, concatenation department adopts second waterproof rubber strip 11 to meet.
In embodiment 8, the bridge deck widening device for the central dividing strip of the highway bridge in embodiment 1 is characterized in that wet joints 16 are arranged between the cantilever sections of the new prefabricated right main beam 14 and the existing right main beam 17, between the cantilever sections of the new prefabricated left main beam 15 and the existing left main beam 17, and existing diaphragm plates are arranged on the cantilever sides of the existing right main beam 17 and the existing left main beam 17.
The concrete construction process is that,
firstly, construction preparation, namely determining a part of lane range of a highway to be sealed according to the actual situation of site traffic, preparing materials and equipment required by construction, planning a material stack and a prefabricated field of a main beam, hardening a corresponding transportation road, and checking whether an existing support meets the stress requirement of a running period;
prefabricating new main beams according to a design drawing, namely prefabricating a new main beam 15 on the left side and a new main beam 14 on the right side, additionally arranging a prefabricated transverse partition plate 24 at the position of the prefabricated new main beam corresponding to an existing transverse partition plate, namely additionally arranging a prefabricated transverse partition plate 24 on the right side for the new main beam, additionally arranging a prefabricated transverse partition plate 24 on the left side for the new main beam on the right side, pre-embedding a steel plate 20 at the additionally arranged prefabricated transverse partition plate 24, and respectively welding overhanging steel plates 21 on the pre-embedded steel plate 20; prefabricating a steel bar of an embedded steel plate 6 and an embedded steel plate 1 of a cantilever section of a new main beam, and respectively welding box type cantilever structures (namely a lower side cantilever box type structure 2 and an upper side cantilever box type structure 3) on the cantilever section of the new main beam;
thirdly, traffic in the construction range is closed according to needs, a bridge deck pavement layer in the construction required range is removed, joints between the two inner main beams and the existing main beam 17 are removed and roughened, cantilever overhanging stressed main ribs of the existing main beam are cleaned, the two inner main beams are removed, and whether the support needs to be replaced is determined;
hoisting a right prefabricated new main beam 14, hoisting a left prefabricated new main beam 15, binding a wet joint 16 steel bar, and pouring the left prefabricated new main beam 15 or the wet joint 16 between the right prefabricated new main beam 14 and an existing main beam 17;
fifthly, mounting connecting steel plates 22 among the prefabricated transverse partition plates 24, connecting the connecting steel plates by using common bolts 23, mounting rectangular closed reinforcing steel bars 4 between the lower cantilever box-type structure 2 and the upper cantilever box-type structure 3, mounting telescopic rubber strips 5, and mounting a left-side pavement layer embedded steel plate 6 and a right-side pavement layer embedded steel plate 6;
sixthly, installing longitudinal telescopic steel frames between the pavement layers, installing reinforcing steel plates 7 on the longitudinal telescopic steel frames, and embedding reinforcing steel bars of bridge deck steel plates 12 and 13 above the longitudinal telescopic steel frames in advance. Pouring C40 steel fiber concrete layers 8 at two sides of the expansion joint, firstly installing a bridge deck steel plate 13 on the left side of the longitudinal expansion joint, then installing a waterproof rubber strip 10, and finally installing a bridge deck steel plate 12 on the right side of the longitudinal expansion joint, wherein all steel members are subjected to rust prevention and corrosion prevention treatment;
and seventhly, recovering the bridge deck pavement layer according to 1-2% of the cross slope, and re-dividing the lane marking lines.
"fixed meeting" of the utility model usually adopts welding or bolt to meet.
The invention can better solve the following technical problems: 1. only two inner main beams need to be disassembled and replaced, and the closing time of traffic on the expressway is shortened; 2. a prefabricated transverse partition plate is poured on the side of the cantilever of the new prefabricated main beam, and a steel plate with a corresponding reinforcing steel bar is embedded, so that the vertical rigidity of the cantilever section is improved; 3. the prefabricated transverse partition plates of the two inner main beams are connected with a common bolt through a connecting steel plate with holes, so that the construction speed is increased and the self weight of the cantilever section is reduced; 4. cantilever box type structures capable of sliding in one direction are arranged on cantilever sections of two inner main beams, and thick steel bars enclosed into rectangles are connected up and down to form a whole, so that the self weight of the cantilever sections is reduced while the strength and the rigidity of the cantilever box type structures are ensured; 5. set up longitudinal expansion joint in the layer of mating formation, but the steel sheet that the higher authority installation can one-way slip when improving vehicle driving comfort level, guarantees that the girder transversely can freely stretch out and draw back the deformation, avoids the bridge floor to produce the crack because of the temperature effect.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (9)
1. A bridge deck widening device suitable for a central dividing strip of an expressway bridge is characterized by comprising a left prefabricated new main beam and a right prefabricated new main beam, wherein the left prefabricated new main beam is in butt joint with an existing main beam on the left side of the expressway bridge, the right prefabricated new main beam is in butt joint with an existing main beam on the right side of the expressway bridge, the left prefabricated new main beam and the right prefabricated new main beam are respectively composed of a support section, a cantilever section and a paving layer arranged on the cantilever section, the cantilever section of the left prefabricated new main beam is connected with the cantilever section of the right prefabricated new main beam through a cantilever section connecting component, and the paving layer of the left prefabricated new main beam is connected with the paving layer of the right prefabricated new main beam through a paving layer connecting component;
the cantilever section connecting component comprises a lower cantilever box type structure and an upper cantilever box type structure which are arranged in a vertically staggered manner, the lower cantilever box type structure is fixedly connected with the side surface of the cantilever section of the new prefabricated right main beam, the upper cantilever box type structure is fixedly connected with the side surface of the cantilever section of the new prefabricated left main beam, and a telescopic rubber strip is arranged between the upper cantilever box type structure and the cantilever section of the new prefabricated right main beam;
the layer connecting member of mating formation includes that the left side is mated formation the pre-buried steel sheet in layer and the pre-buried steel sheet in layer of right side mating formation, the layer pre-buried steel sheet of layer and the fixed meeting of cantilever section top surface of the existing girder in left side mating formation in left side, the layer pre-buried steel sheet of layer and the right side mating formation in right side are mated formation and are connected through the fixed steelframe that vertically stretches out and draws back between the layer pre-buried steel sheet, the space between the layer is mated formation in vertical flexible steelframe and left side, the space between the layer is mated formation in vertical flexible steelframe and right side has all filled C40 steel fiber concrete layer, vertical flexible steelframe top is equipped with the pre-buried steel sheet that covers C40 steel fiber concrete layer and can one-way slip.
2. The bridge deck widening device for the central separation strip of the highway divided bridge according to claim 1, wherein a left prefabricated diaphragm plate is additionally arranged at the position, corresponding to the existing diaphragm plate, of the left prefabricated new main girder, a right prefabricated diaphragm plate is additionally arranged at the position, corresponding to the existing diaphragm plate, of the right prefabricated new main girder, and the left prefabricated diaphragm plate and the right prefabricated diaphragm plate are connected through a steel diaphragm connecting piece subjected to corrosion and rust prevention treatment.
3. The bridge deck widening device for the central separation strip of the highway divided bridge, according to claim 2, is characterized in that the steel diaphragm connecting piece is provided with two connecting steel plates, the connecting steel plates are connected with diaphragm overhanging steel plates through common bolts, and the diaphragm overhanging steel plates are fixed on pre-embedded steel plates on a right prefabricated diaphragm plate or a left prefabricated diaphragm plate.
4. The bridge deck widening device applicable to the central separation strip of the highway framing bridge according to claim 3, wherein the longitudinal telescopic steel frame comprises left vertical section steel fixedly connected with a left side pavement layer embedded steel plate and right vertical section steel fixedly connected with a right side pavement layer embedded steel plate, a longitudinal expansion joint is arranged between the left side vertical section steel and the right side vertical section steel, and a first waterproof rubber strip is mounted at the longitudinal expansion joint.
5. The bridge deck widening device for the central separation strip of the highway bridge as claimed in claim 4, wherein reinforcing steel plates are welded between the left vertical section steel and the left pre-buried steel plates of the pavement layer and between the right vertical section steel and the right pre-buried steel plates of the pavement layer.
6. The bridge deck widening device for the central separation strip of the highway divided bridge according to claim 5, wherein a cantilever section embedded steel plate fixedly connected with a lower cantilever box type structure or an upper cantilever box type structure is arranged on the side surface of a cantilever section of the left prefabricated new main girder or the right prefabricated new main girder.
7. The bridge deck widening device applicable to the central separation strip of the highway framing bridge of claim 6, wherein the cantilever section embedded steel plates, the left side pavement layer embedded steel plates and the right side pavement layer embedded steel plates are all subjected to reinforcing steel bar perforation plug welding.
8. The bridge deck widening device for the central separation strip of the highway divided bridge according to claim 7, wherein rectangular closed reinforcing steel bars capable of moving in two directions of the cross bridge are arranged on the lower cantilever box-type structure and the upper cantilever box-type structure and are connected through steel sleeves.
9. The bridge deck widening device for the central separation strip of the highway bridge according to claim 8, wherein wet joints with adjustable widths are arranged between the cantilever section of the new prefabricated right girder and the cantilever section of the existing right girder and between the cantilever section of the new prefabricated left girder and the cantilever section of the existing left girder.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120705073.6U CN214573424U (en) | 2021-04-07 | 2021-04-07 | Bridge deck widening device suitable for central separation strip of highway framing bridge |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120705073.6U CN214573424U (en) | 2021-04-07 | 2021-04-07 | Bridge deck widening device suitable for central separation strip of highway framing bridge |
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| CN214573424U true CN214573424U (en) | 2021-11-02 |
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| CN202120705073.6U Active CN214573424U (en) | 2021-04-07 | 2021-04-07 | Bridge deck widening device suitable for central separation strip of highway framing bridge |
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- 2021-04-07 CN CN202120705073.6U patent/CN214573424U/en active Active
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