CN103276662B - Large-cantilever steel web spinal box beam segment - Google Patents
Large-cantilever steel web spinal box beam segment Download PDFInfo
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- CN103276662B CN103276662B CN201310175161.XA CN201310175161A CN103276662B CN 103276662 B CN103276662 B CN 103276662B CN 201310175161 A CN201310175161 A CN 201310175161A CN 103276662 B CN103276662 B CN 103276662B
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Abstract
The invention discloses a kind of Large-cantilever steel web spinal box beam segment and construction technology, it comprises Cell beam base plate and Cell back plate, two blocks of steel webs are provided with between Cell beam base plate and Cell back plate, Cell back plate comprises the roof rail being arranged on middle part and the wing plate being fixedly connected on roof rail both lateral sides, between wing plate lateral outer side and Cell beam base plate, be provided with the system of putting more energy into, Cell back plate is longitudinally provided with top board prestressed pore passage; The longitudinal two ends of steel web are provided with bolt preformed hole; Cell beam base plate is longitudinally provided with baseboard prestress duct.Each component in the present invention is segmentation structure, and gradation can be adopted to lift, and lifting weight is little, and require greatly to reduce to transport and lifting appliance, conventional vehicle hangs or crawler crane, is equipped with little tonnage Beam transportation vehicle and can completes construction.
Description
Technical field
The utility model relates to bridge construction technical field, particularly relates to a kind of Large-cantilever steel web spinal box beam segment.
Background technology
At present, in bridge construction technical field, being most widely used of concrete box-beam bridge and steel reinforced concrete combination box beam bridge, web in this scheme is concrete web, construction inconvenience in transport and hoisting process, and concrete web is easy to crack, its shear strength is lower, specifically has following shortcoming:
1, the thickness of concrete web is 300 ~ 800mm, and its deadweight is heavier, makes the upper and lower part Structural Engineering of web increase accordingly, increase project total cost accordingly, and anti seismic efficiency is poor;
2, concrete web structural performance is poor, its prestressing force weak effect;
3, site operation efficiency is low, and the transport of concrete web steel web and lifting are also inconvenient.
4, concrete web affects by factors such as external force load, easily occurs cracking phenomena, causes reinforcement corrosion to such an extent as to will carry out the problems such as maintenance reinforcement.
Therefore, need improve prior art.
Utility model content
The purpose of this utility model is just the deficiency solving above-mentioned background technology, provides a kind of Large-cantilever steel web spinal box beam segment of convenient and quick construction.
The technical solution of the utility model is: a kind of Large-cantilever steel web spinal box beam segment, it comprises Cell beam base plate and Cell back plate, it is characterized in that: between described Cell beam base plate and Cell back plate, be provided with two blocks of steel webs, described Cell back plate comprises the roof rail being arranged on middle part and the wing plate being fixedly connected on roof rail both lateral sides, between wing plate lateral outer side and Cell beam base plate, be provided with the system of putting more energy into, described Cell back plate is longitudinally provided with top board prestressed pore passage; The longitudinal two ends of described steel web are provided with bolt preformed hole; Described Cell beam base plate is longitudinally provided with baseboard prestress duct.
In such scheme:
Described roof rail is fixedly connected with by the U-shaped bar splice being arranged on roof rail transverse ends with wing plate.
Described wing plate is great cantilever wing plate, and the lateral length of described wing plate is no less than 5m.
The described system of putting more energy into is diagonal brace.
Described steel web is Wavelike steel webplate.
Described steel web is embedded in Cell beam base plate/Cell back plate.
Be provided with connector between described steel web both lateral sides and Cell beam base plate/Cell back plate, described steel web, connector, Cell beam base plate/Cell back plate be connected successively reinforcing bar horizontal through and fastening.
Described steel web end winding support is connected with junction plate, and described junction plate is embedded in Cell beam base plate/Cell back plate, described junction plate, Cell beam base plate/Cell back plate by peg vertically to through and fastening.
The end face of described Cell beam base plate and Cell back plate is provided with convex shear connector, is provided with at the end face with described Cell beam base plate and assembled another Cell beam base plate of Cell back plate and Cell back plate the matrix shear connector cooperatively interacted with convex shear connector.
A construction technology for Large-cantilever steel web spinal box beam segment, is characterized in that, comprises following steps:
1), steel web is embedded in Cell beam base plate and Cell back plate, and complete concrete the building of Cell beam base plate and Cell back plate, steel web is fixedly connected with Cell beam base plate, Cell back plate, namely completes building of a Cell girder segment;
2), to build Cell girder segment for end mould, coupling builds adjacent cells section box girder successively;
3), bridge location place is transported to by building box girder segment;
4), assembled box girder segment successively, fix the steel web of adjacent segment after assembled;
5), system of putting more energy into is installed.
The utility model has the advantage of:
(1) the steel web, in the utility model, its thickness is about 8 ~ 30mm, compared to thick and heavy concrete web, under equal deck-molding and the wide condition of bridge, steel web is only 60 ~ 70% of the deadweight of conventional concrete web box girder sections, makes the engineering quantity of its upper and lower part structure reduce accordingly, saves constructional materials, its remarkable in economical benefits, reduces project total cost;
(2), Wavelike steel webplate deadweight reduce, anti-seismic performance is good: adopt Wavelike steel webplate bridge deadweight and adopt concrete web bridge compared with approximately alleviate 20%, cause seismic stimulation action effect significantly to reduce, anti-seismic performance obtains certain raising;
(3), web shear strength is improved, reduce prestressed consumption, significantly improve structural performance: the longitudinal rigidity of Wavelike steel webplate is less, resist axial force hardly, thus do not resisted when importing prestressing force, longitudinal restraint power on concentrated loading and case beam base plate/case back plate, thus effectively can improve prestressing force efficiency;
(4), the utility model by by prefabricated, assembled for each member segments formula, alleviate the weight of each several part, achieve the lightness of prefabricated units, unique form of structure makes it to be more suitable for wide cut Loads of Long-span Bridges, and effectively can ensure the rigidity of structure;
(5), structure each several part is prefabricated complete after, cast-in-place junction forms box girder, achieve construction of being broken the whole up into parts by section box girder, greatly reduce traditional handicraft to prefabricated, transport and the requirement of erection equipment, improve the economy that precast segment is assembled, be beneficial to factorial construction, can construction quality be ensured, accelerate construction speed again.
Accompanying drawing explanation
Fig. 1 is the utility model structural representation;
Fig. 2 be the utility model assembled after structural representation;
Fig. 3 is the steel web structure schematic diagram in the utility model;
Fig. 4 is the annexation schematic diagram embodiment one of the steel web in the utility model;
Fig. 5 is the annexation schematic diagram embodiment two of the steel web in the utility model.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail, is convenient to be well understood to the utility model, but they do not form restriction to the utility model.
A kind of Large-cantilever steel web spinal box beam segment as illustrated in the drawing, it comprises Cell beam base plate 1 and Cell back plate 2, two blocks of steel webs 3 are provided with between Cell beam base plate 1 and Cell back plate 2, Cell back plate 2 comprises the roof rail 2.1 being arranged on middle part and the wing plate 2.2 being fixedly connected on roof rail 2.1 both lateral sides, wing plate 2.2 is no less than the great cantilever wing plate of 5m for lateral length, between wing plate 2.2 lateral outer side and Cell beam base plate 1, be provided with the system of putting more energy into 4, Cell back plate 2 is longitudinally provided with top board prestressed pore passage 2.3; The longitudinal two ends of steel web 3 are provided with bolt preformed hole 3.1; Cell beam base plate 1 is longitudinally provided with baseboard prestress duct 1.1.
In the utility model, the top board prestressed pore passage 2.3 that Cell back plate 2 is provided with is passed by reinforcing bar when splicing, Cell back plate 2 can be made longitudinally to splice, the bolt preformed hole 3.1 that steel web 3 is provided with makes steel web 3 longitudinal spliced when splicing by bolt etc., the baseboard prestress duct 1.1 that Cell beam base plate 1 is provided with is passed by reinforcing bar when splicing, and Cell beam base plate 1 can be made longitudinally to splice when splicing.
In the utility model:
Roof rail 2.1 is fixedly connected with by the U-shaped bar splice 2.4 being arranged on roof rail transverse ends with wing plate 2.2, during connection, U-shaped bar splice 2.4 two ends enter in roof rail 2.1 and wing plate 2.2 respectively, and wing plate 2.2 also can adopt the mode of poured in place concrete to construct.
System of putting more energy into 4 is diagonal brace, can be used for guard box girder construction intensity.
Steel web 3 is Wavelike steel webplate.
Embodiment one:
As shown in Figure 4, steel web 3 is embedded in Cell beam base plate 1/ Cell back plate 2, be provided with connector 5 between steel web 3 both lateral sides and Cell beam base plate 1/ Cell back plate 2, steel web 3, connector 5, Cell beam base plate 1/ Cell back plate 2 be connected successively reinforcing bar 7 horizontal through and fastening.
Implement two:
As shown in Figure 5, steel web 3 is embedded in Cell beam base plate 1/ Cell back plate 2, steel web 3 end winding support is welded with junction plate 6, junction plate 6 is embedded in Cell beam base plate 1/ Cell back plate 2, junction plate 6, Cell beam base plate 1/ Cell back plate 2 by peg 8 vertically to through and fastening.
In the utility model, the end face of Cell beam base plate 1 and Cell back plate 2 is provided with convex shear connector, is provided with at the end face with Cell beam base plate 1 and assembled another Cell beam base plate 1 of Cell back plate 2 and Cell back plate 2 the matrix shear connector cooperatively interacted with convex shear connector.
A construction technology for Large-cantilever steel web spinal box beam segment, comprises following steps:
1), steel web 3 is embedded in Cell beam base plate 1 and Cell back plate 2, and complete Cell beam base plate 1 and the concrete of Cell back plate 2 is built, steel web 3 is fixedly connected with Cell beam base plate 1, Cell back plate 2, namely completes building of a Cell girder segment;
2), to build Cell girder segment for end mould, coupling builds adjacent cells section box girder successively;
3), box girder segment will be built by transporting apparatus transports such as transport vehicles to bridge location place;
4), adopt Bridge Erector or other lifting appliances assembled box girder segment successively, after assembled, fix the steel web of adjacent segment, and prestressed strand in tensioned unit case back plate, Cell beam base plate;
5), system of putting more energy into is installed, makes it to form overall stress system.
The utility model is great cantilever steel web spine precast box girder segment first " breaking the whole up into parts " just, the construction technology of " turning parts into the whole " afterwards, namely first in precasting yard, according to construction requirement, segmented carried out to Cell beam base plate 1 and Cell back plate 2 prefabricated, alleviate its weight, undertaken assembled by lifting appliance (Bridge Erector or crane etc.) subsequently, and the connection completed between Cell beam base plate 1, steel web 3, Cell back plate 2 is assembled.In the utility model, each component is segmentation structure, and gradation can be adopted to lift, and lifting weight is little, and require greatly to reduce to transport and lifting appliance, conventional vehicle hangs or crawler crane, is equipped with little tonnage Beam transportation vehicle and can completes construction.
Longitudinal sections that the utility model not only can carry out case beam divides, also can carry out horizontal division according to its ingredient, in addition the application of Wavelike steel webplate, make it prefabricated units lift heavy greatly to reduce, the economy of further raising segment matches precast assembly new technology, applicability and efficiency of construction are the manufacturing process of a kind of standardization, batch production, lightness.
Claims (7)
1. a Large-cantilever steel web spinal box beam segment, it comprises Cell beam base plate and Cell back plate, it is characterized in that: between described Cell beam base plate and Cell back plate, be provided with two blocks of steel webs, described Cell back plate comprises the roof rail being arranged on middle part and the wing plate being fixedly connected on roof rail both lateral sides, between wing plate lateral outer side and Cell beam base plate, be provided with the system of putting more energy into, described Cell back plate is longitudinally provided with top board prestressed pore passage; The longitudinal two ends of described steel web are provided with bolt preformed hole; Described Cell beam base plate is longitudinally provided with baseboard prestress duct; Described roof rail is fixedly connected with by the U-shaped bar splice being arranged on roof rail transverse ends with wing plate; The end face of described Cell beam base plate and Cell back plate is provided with convex shear connector, is provided with at the end face with described Cell beam base plate and assembled another Cell beam base plate of Cell back plate and Cell back plate the matrix shear connector cooperatively interacted with convex shear connector.
2. Large-cantilever steel web spinal box beam segment according to claim 1, is characterized in that: described wing plate is great cantilever wing plate, and the lateral length of described wing plate is no less than 5m.
3. Large-cantilever steel web spinal box beam segment according to claim 1, is characterized in that: described in the system of putting more energy into be diagonal brace.
4. Large-cantilever steel web spinal box beam segment according to claim 1, is characterized in that: described steel web is Wavelike steel webplate.
5. Large-cantilever steel web spinal box beam segment according to claim 1, is characterized in that: described steel web is embedded in Cell beam base plate/Cell back plate.
6. Large-cantilever steel web spinal box beam segment according to claim 5, it is characterized in that: between described steel web both lateral sides and Cell beam base plate/Cell back plate, be provided with connector, described steel web, connector, Cell beam base plate/Cell back plate be connected successively reinforcing bar horizontal through and fastening.
7. Large-cantilever steel web spinal box beam segment according to claim 5, it is characterized in that: described steel web end winding support is connected with junction plate, described junction plate is embedded in Cell beam base plate/Cell back plate, described junction plate, Cell beam base plate/Cell back plate by peg vertically to through and fastening.
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| CN201310175161.XA CN103276662B (en) | 2013-05-13 | 2013-05-13 | Large-cantilever steel web spinal box beam segment |
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| CN201310175161.XA CN103276662B (en) | 2013-05-13 | 2013-05-13 | Large-cantilever steel web spinal box beam segment |
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| CN103276662B true CN103276662B (en) | 2015-09-16 |
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Cited By (1)
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| WO2017166160A1 (en) * | 2016-03-31 | 2017-10-05 | 中交第二航务工程局有限公司 | Short-line match-casting-based precast template system for girder bridge having composite structure and corrugated steel webs |
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| CN113585037B (en) * | 2021-08-03 | 2022-08-09 | 南京工业大学 | Modular prefabricated corrugated steel web combined box girder and field assembly process thereof |
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