CN112523067A - Combined beam - Google Patents
Combined beam Download PDFInfo
- Publication number
- CN112523067A CN112523067A CN202011387422.0A CN202011387422A CN112523067A CN 112523067 A CN112523067 A CN 112523067A CN 202011387422 A CN202011387422 A CN 202011387422A CN 112523067 A CN112523067 A CN 112523067A
- Authority
- CN
- China
- Prior art keywords
- steel
- bridge
- concrete
- sections
- composite beam
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 93
- 239000010959 steel Substances 0.000 claims abstract description 93
- 239000004567 concrete Substances 0.000 claims abstract description 56
- 239000000835 fiber Substances 0.000 claims abstract description 23
- 239000011150 reinforced concrete Substances 0.000 claims abstract description 19
- 239000002131 composite material Substances 0.000 claims description 19
- 239000010426 asphalt Substances 0.000 claims description 6
- 238000003466 welding Methods 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 17
- 239000000463 material Substances 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000005336 cracking Methods 0.000 abstract description 3
- 239000003351 stiffener Substances 0.000 description 7
- 238000005452 bending Methods 0.000 description 6
- 230000008901 benefit Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009417 prefabrication Methods 0.000 description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000004574 high-performance concrete Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
Images
Classifications
-
- 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
-
- 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
- E01D19/12—Grating or flooring for bridges; Fastening railway sleepers or tracks to bridges
- E01D19/125—Grating or flooring for bridges
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/20—Concrete, stone or stone-like material
- E01D2101/24—Concrete
- E01D2101/26—Concrete reinforced
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/30—Metal
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a combined beam which comprises at least two bridge span sections, wherein each bridge span section is provided with a bridge deck and a plurality of steel beams, each bridge deck comprises a steel fiber concrete plate and a reinforced concrete plate, the steel fiber concrete plates are arranged at the sections of the two adjacent bridge span sections, and the reinforced concrete plates are arranged on the bridge span sections. The bridge is paved by combining the steel fiber concrete slabs and the reinforced concrete slabs, so that the manufacturing cost of the bridge is reduced, the material properties of the two slabs are fully exerted, the problem of unfavorable stress in a hogging moment area is effectively solved, and the bridge deck is prevented from cracking and damaging in the hogging moment area. The invention can be widely applied to the technical field of bridge construction.
Description
Technical Field
The invention relates to the technical field of bridge construction, in particular to a combined beam.
Background
With the popularization of green construction and sustainable construction concepts, the proportion of the steel-concrete combined continuous beam in highway and railway bridges is gradually increased due to the excellent mechanical property of the steel-concrete combined continuous beam. The steel-concrete combined continuous beam has the comprehensive advantages of steel and concrete, has the advantages of small cross section size, convenience in construction, high rigidity, reasonable stress, high material utilization rate and the like, and is a bridge structure capable of being continuously developed. However, the steel-concrete composite continuous beam has a negative bending moment near the pivot of the bridge pier, so that the concrete bridge deck is easy to crack under tension, the section rigidity is weakened, and the durability of the bridge is seriously influenced; meanwhile, the lower flange of the steel beam is seriously pressed, and the buckling instability under the pressure is easy to occur.
In order to solve the above problems, in the engineering field, in the last 20 years, methods such as hogging moment area bridge deck slab construction technology development lag construction, prestress bundle arrangement in the hogging moment area bridge deck slab, micro-expansion concrete, in-situ casting high-performance concrete, fulcrum lifting method and the like are adopted to reduce the tensile stress of the hogging moment area bridge deck slab concrete and increase the thickness of a lower flange steel plate to resist the compressive stress, but the methods are complex in technology, complex in construction, high in cost, high in welding operation difficulty, high in constant load ratio, low in efficiency and not obvious in improvement of section rigidity.
In addition, in the face of increasing traffic volume, bridge builders must change ideas from site construction to industrial assembly and develop rapid and efficient beam construction and replacement technologies, so as to reduce the influence on the existing traffic to the maximum extent, which is obviously a problem to be solved urgently.
Disclosure of Invention
In order to solve at least one of the above technical problems and solve the problem of negative bending moment disadvantage, the invention provides a combined beam, which adopts the following technical scheme:
the composite beam provided by the invention comprises at least two bridge span sections, wherein the bridge span sections are provided with bridge decks and a plurality of steel beams, the bridge decks comprise steel fiber concrete plates and reinforced concrete plates, the steel fiber concrete plates are arranged at the sections of two adjacent bridge span sections, and the reinforced concrete plates are arranged on the bridge span sections.
In some embodiments of the invention, end stiffeners are arranged at the ends of the steel beams, and the steel beams paired on two adjacent bridge-spanning sections are butted by bolts arranged on the end stiffeners.
In some embodiments of the invention, a stiffening box is arranged on the lower edge of the steel beam, and the stiffening box is welded at the fulcrum of the steel beam.
In some embodiments of the invention, the stiffening region on the lower edge of the steel beam is provided with a cover plate, and the cover plate is welded on the steel beam.
In some embodiments of the invention, the steel beam is provided with a plurality of web stiffeners.
In some embodiments of the present invention, in two adjacent cross-beam sections, two steel beams disposed in a matching pair are connected by a concrete structure, one part of the concrete structure is fixed to one of the steel beams by bolts, the other part of the concrete structure is fixed to the other steel beam by bolts, and the concrete structure includes two concrete connecting plates disposed on two sides of the steel beam.
In some embodiments of the invention, the steel beam is configured as an H-beam.
In some embodiments of the present invention, two adjacent plates in the bridge deck are connected by a threaded steel bar.
In some embodiments of the invention, the steel fiber concrete plate is fixed with the steel beam through bolts, and the reinforced concrete plate is fixed with the steel beam through bolts.
In some embodiments of the invention, an asphalt layer is disposed on the composite beam.
The embodiment of the invention has at least the following beneficial effects: the bridge is paved by combining the steel fiber concrete slabs and the reinforced concrete slabs, so that the manufacturing cost of the bridge is reduced, the material properties of the two slabs are fully exerted, the problem of unfavorable stress in a hogging moment area is effectively solved, and the bridge deck is prevented from cracking and damaging in the hogging moment area. The invention can be widely applied to the technical field of bridge construction.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a structural view of a composite beam in which an asphalt layer is laid;
FIG. 2 is a block diagram of a composite beam, shown with a steel fiber concrete slab;
FIG. 3 is a structural view of a steel beam showing end stiffeners and a stiffening box;
fig. 4 is a structural view of a steel fiber concrete panel;
FIG. 5 is a schematic structural view of an end stiffener;
FIG. 6 is a schematic structural view of a stiffener box;
FIG. 7 is a schematic structural view of the composite beam mounted on the support;
FIG. 8 is a cross-sectional view taken along line A-A of FIG. 7;
FIG. 9 is a block diagram of a composite beam showing two adjacent span segments installed by concrete connecting plates;
fig. 10 is a sectional view taken along line B-B in fig. 9.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it is to be understood that if the terms "center", "middle", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., are used in an orientation or positional relationship indicated based on the drawings, it is merely for convenience of description and simplicity of description, and it is not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore, is not to be considered as limiting the present invention. The features defined as "first" and "second" are used to distinguish feature names rather than having a special meaning, and further, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example one
The invention relates to a combined beam, which adopts a steel-concrete combined structure to form an assembled simply-supported variable continuous combined beam, and comprises at least two bridge span sections, wherein each bridge span section is provided with a bridge deck and a plurality of steel beams 101, the steel beams 101 on the bridge span sections are arranged side by side, the bridge deck is paved on the steel beams 101, the combined beam is provided with an asphalt layer 106, and the asphalt layer 106 is poured on the bridge deck. Further, the steel beam 101 is provided as H-shaped steel.
The lower edge of the steel beam 101 is provided with the stiffening box 104, the stiffening box 104 is made of steel, the section of the stiffening box 104 is of a T-shaped structure, the stiffening box 104 is welded at the fulcrum of the steel beam 101 to form a variable-section beam, and compared with a common steel structure beam, the variable-section beam increases the compression area of the lower edge of the section near the fulcrum, enhances the compression stability and enhances the compression resistance of the lower edge. Further, the end of the steel beam 101 is provided with an end stiffening rib 103, the steel beams 101 paired on two adjacent beam spanning sections are butted through bolts arranged on the end stiffening rib 103 to form a steel structure continuous beam, bolt holes are reserved in the end stiffening rib 103, and high-strength bolts are adopted. It will be appreciated that to increase the strength of the steel beam 101, the steel beam 101 is provided with a plurality of web stiffeners. The variable cross-section beam is formed by arranging the stiffening box 104, the end stiffening rib 103, the web stiffening rib and the like, so that the bridge span connection strength is further enhanced, and the pressure instability is prevented.
With reference to the attached drawings, a cover plate 105 is arranged on the stiffening area of the lower edge of the steel beam 101, and the cover plate 105 is welded on the steel beam 101, so that the outer steel plate is integrally formed.
The bridge deck comprises a steel fiber concrete plate 102 and a reinforced concrete plate 107, the steel fiber concrete plate 102 has ultrahigh performance, the steel fiber concrete plate 102 is arranged at the section of two adjacent bridge sections, and the reinforced concrete plate 107 is arranged on the bridge sections. Specifically, the steel fiber concrete plate 102 is fixed to the steel beam 101 by bolts, and the reinforced concrete plate 107 is fixed to the steel beam 101 by bolts, which are high-strength bolts. It can be understood that the steel fiber concrete plate 102 is arranged at the support section, and the reinforced concrete plates 107 are adopted in other sections to form a multi-plate combined bridge deck, so that the material properties of the two plates are fully exerted, the manufacturing cost of the bridge is reduced, the benefit is increased, the problem of negative bending moment of the steel-concrete combined continuous beam is effectively solved, and the bridge deck is prevented from cracking and damaging in the negative bending moment area. Furthermore, two adjacent plates in the bridge deck are connected through the twisted steel bars, and the twisted steel bars are set as prestressed finish-rolled steel bars.
The construction scheme of the composite girder will be described with reference to the accompanying drawings.
Manufacturing a variable-section beam: according to the span size, the load grade, the section steel specification and the like, a proper steel beam 101 is selected, bolt holes are arranged according to the design requirement, and the stiffening box 104 and the web stiffening rib are welded in a factory.
Prefabricating a bridge deck: and reinforcing steel bars of the steel fiber concrete plate 102 and the reinforced concrete plate 107 according to design calculation and specification requirements, and reserving bolt holes according to the arrangement mode of the high-strength bolts. The bridge deck slab should be stored for a period of time, at least 3 months, after the prefabrication of the bridge deck slab is completed, so that the shrinkage and creep of the concrete are basically completed.
Hoisting the bridge deck: and hoisting the steel fiber concrete plates 102 and the reinforced concrete plates 107 piece by piece, adopting a single continuous steel fiber concrete plate 102 at the support, and fastening high-strength bolts between the bridge deck and the steel beam 101 at the rest positions by using the reinforced concrete plates 107.
And (3) constructing other accessory facilities: and pouring an asphalt layer 106 on the bridge deck as a road surface, installing a guardrail and finishing construction.
It can be understood that the prefabricated steel fiber concrete slab 102 is adopted to resist the tensile stress of the hogging moment area of the composite beam, the stiffening box 104 is welded to improve the pressure resistance of the lower edge of the steel beam 101, and the steel beam has the advantages of prefabrication, assembly, high standardization degree, good integral stress, no post-cast strip and the like, does not need cast-in-place concrete, is easy to install and replace, and greatly shortens the construction period.
The traditional steel-concrete combined continuous beam adopts a single reinforced concrete slab when a bridge deck slab is prefabricated, is not beneficial to bearing negative bending moment, and has the defect of unfavorable stress in a negative bending moment area.
Compared with the traditional construction process of the combined continuous beam bridge, the bridge deck related by the invention is prefabricated in a factory in sections, bolt holes are reserved, no pouring is needed on site, the difficulty of later repair and rectification is reduced, the bridge deck has the characteristics of small self weight, easiness in transportation and hoisting, stable quality and the like, and the influence of concrete shrinkage creep on the stress performance of the bridge is basically eliminated. In addition, compared with the integrally cast bridge deck slab which is made of steel fiber concrete, the steel fiber concrete slab 102 and the reinforced concrete slab 107 are matched for use, so that the construction cost and the construction difficulty are obviously reduced.
Example two
The difference between the embodiment and the second embodiment is that two adjacent bridge-spanning sections are connected through a concrete structure. Specifically, in two adjacent beam spanning sections, two steel beams 101 which are matched and arranged oppositely are connected through a concrete structure, one part of the concrete structure is fixed with one of the steel beams 101 through a bolt, the other part of the concrete structure is fixed with the other steel beam 101 through a bolt, the concrete structure comprises two concrete connecting plates 108, the two concrete connecting plates 108 are respectively arranged on two sides of the steel beam 101, and the steel beam 101 is provided with a plurality of through holes for the bolts to pass through.
In the description herein, references to the terms "one embodiment," "some examples," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" or the like, if any, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While the embodiments of the present invention have been described in detail with reference to the drawings, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.
Claims (10)
1. A composite beam, its characterized in that: comprises at least two bridge span sections, wherein the bridge span sections are provided with a bridge deck and a plurality of steel beams (101), the bridge deck comprises a steel fiber concrete plate (102) and a reinforced concrete plate (107), the steel fiber concrete plate (102) is arranged at the section of two adjacent bridge span sections, and the reinforced concrete plate (107) is arranged on the bridge span sections.
2. The composite beam defined in claim 1, wherein: the end part of the steel beam (101) is provided with an end part stiffening rib (103), and the two adjacent cross beam sections are paired with the steel beam (101) and are butted through bolts arranged on the end part stiffening rib (103).
3. The composite beam defined in claim 1, wherein: the lower edge of girder steel (101) is provided with stiffening box (104), stiffening box (104) welding is in the fulcrum department of girder steel (101).
4. The composite beam defined in claim 3, wherein: girder steel (101) lower edge stiffening area is provided with apron (105), apron (105) welding is in on girder steel (101).
5. The composite beam defined in claim 1, wherein: the steel beam (101) is provided with a plurality of web stiffening ribs.
6. The composite beam defined in claim 1, wherein: in two adjacent bridge span sections, two steel beams (101) which are arranged in a matched pair are connected through a concrete structure, one part of the concrete structure is fixed with one of the steel beams (101) through bolts, the other part of the concrete structure is fixed with the other steel beam (101) through bolts, the concrete structure comprises two concrete connecting plates (108), and the two concrete connecting plates (108) are respectively arranged on two sides of the steel beams (101).
7. The composite beam defined in any one of claims 1 to 6, wherein: the steel beam (101) is set to be H-shaped steel.
8. The composite beam defined in any one of claims 1 to 6, wherein: and two adjacent plates in the bridge deck are connected through a threaded steel bar.
9. The composite beam defined in any one of claims 1 to 6, wherein: the steel fiber concrete plate (102) is fixed with the steel beam (101) through bolts, and the reinforced concrete plate (107) is fixed with the steel beam (101) through bolts.
10. The composite beam defined in any one of claims 1 to 6, wherein: an asphalt layer (106) is arranged on the combination beam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011387422.0A CN112523067A (en) | 2020-12-02 | 2020-12-02 | Combined beam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011387422.0A CN112523067A (en) | 2020-12-02 | 2020-12-02 | Combined beam |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112523067A true CN112523067A (en) | 2021-03-19 |
Family
ID=74996097
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011387422.0A Pending CN112523067A (en) | 2020-12-02 | 2020-12-02 | Combined beam |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112523067A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112921805A (en) * | 2021-03-26 | 2021-06-08 | 广州大学 | Assembled steel-coconut fiber magnesium phosphate cement bridge deck composite beam and construction method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20140043185A (en) * | 2012-09-28 | 2014-04-08 | 주식회사 홍지 | The steel systhesis beam and the method threreof |
| CN105951574A (en) * | 2016-05-06 | 2016-09-21 | 中铁大桥勘测设计院集团有限公司 | Steel beam segment, continuous combined beam bridge and construction method of continuous combined beam bridge |
| CN108589512A (en) * | 2018-05-31 | 2018-09-28 | 中国铁道科学研究院铁道建筑研究所 | A kind of steel-concrete composite beam structure suitable for heavy haul railway |
| CN110847007A (en) * | 2019-12-11 | 2020-02-28 | 辽宁省交通规划设计院有限责任公司 | Section steel-concrete composite beam hogging moment area structure based on high-performance material |
| CN211200025U (en) * | 2019-08-23 | 2020-08-07 | 辽宁省交通规划设计院有限责任公司 | Shaped steel and concrete combined bridge |
| CN214459554U (en) * | 2020-12-02 | 2021-10-22 | 广州大学 | Combined beam |
-
2020
- 2020-12-02 CN CN202011387422.0A patent/CN112523067A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20140043185A (en) * | 2012-09-28 | 2014-04-08 | 주식회사 홍지 | The steel systhesis beam and the method threreof |
| CN105951574A (en) * | 2016-05-06 | 2016-09-21 | 中铁大桥勘测设计院集团有限公司 | Steel beam segment, continuous combined beam bridge and construction method of continuous combined beam bridge |
| CN108589512A (en) * | 2018-05-31 | 2018-09-28 | 中国铁道科学研究院铁道建筑研究所 | A kind of steel-concrete composite beam structure suitable for heavy haul railway |
| CN211200025U (en) * | 2019-08-23 | 2020-08-07 | 辽宁省交通规划设计院有限责任公司 | Shaped steel and concrete combined bridge |
| CN110847007A (en) * | 2019-12-11 | 2020-02-28 | 辽宁省交通规划设计院有限责任公司 | Section steel-concrete composite beam hogging moment area structure based on high-performance material |
| CN214459554U (en) * | 2020-12-02 | 2021-10-22 | 广州大学 | Combined beam |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112921805A (en) * | 2021-03-26 | 2021-06-08 | 广州大学 | Assembled steel-coconut fiber magnesium phosphate cement bridge deck composite beam and construction method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109440625B (en) | Steel-concrete combined continuous rigid frame steel truss bridge | |
| CN109024219B (en) | Prefabricated ultrahigh-performance concrete-common concrete combined beam bridge structure and construction method | |
| CN213038218U (en) | Predictive continuous rigid frame bridge capable of supplementing tensioning prestress | |
| CN110904864B (en) | Steel-concrete combined system for improving bearing capacity of concrete box girder bridge | |
| CN110846996A (en) | Construction method of continuous composite beam bridge and continuous composite beam bridge | |
| CN111206487A (en) | Variable-height corrugated web steel box-concrete continuous beam bridge and construction method | |
| CN208121541U (en) | In across the steel reinforced concrete composite beam bridge constructed using no mount approach | |
| CN110331664B (en) | Steel-concrete mixed continuous box girder bridge deck joint structure and construction method thereof | |
| CN113481826A (en) | Prefabricated assembled corrugated steel web combination box girder | |
| CN108221636B (en) | Steel-concrete composite beam bridge constructed by adopting bracket-free scheme for midspan and bridge forming method | |
| CN113789711A (en) | NC-UHPC combined assembly type prestressed concrete box girder, construction method and bridge thereof | |
| CN214459554U (en) | Combined beam | |
| CN211772741U (en) | Large-span variable-width corrugated web steel box-concrete continuous beam bridge | |
| CN112523067A (en) | Combined beam | |
| CN219671054U (en) | Steel-concrete combined small box girder prefabricated by integral hoisting | |
| CN113106845A (en) | Assembled tie bar rectangular steel tube concrete truss composite beam and construction method thereof | |
| KR100621928B1 (en) | Construction method of double composite plate girder railway bridge with precast concrete panels | |
| CN111778835A (en) | Combined beam of steel, common concrete and ultrahigh-performance concrete and construction method | |
| CN111206488A (en) | Large-span widened corrugated web steel box-concrete continuous beam bridge and construction method | |
| CN217556726U (en) | Concrete box girder bridge reinforced structure based on FRP section bar | |
| CN114197321B (en) | Prestressed UHPC-NC combined continuous box girder bridge and construction method thereof | |
| CN112095449B (en) | Light-weight combined beam pier top longitudinal connection structure and construction method thereof | |
| CN115287996A (en) | Pier top UHPC-NC combined structure UHPC continuous box girder bridge and construction method thereof | |
| CN216040604U (en) | Prefabricated combined T-beam structure | |
| CN215052112U (en) | Assembled steel-coconut fiber magnesium phosphate cement bridge deck composite beam |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |