CN219671054U - Steel-concrete combined small box girder prefabricated by integral hoisting - Google Patents
Steel-concrete combined small box girder prefabricated by integral hoisting Download PDFInfo
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- CN219671054U CN219671054U CN202320732315.XU CN202320732315U CN219671054U CN 219671054 U CN219671054 U CN 219671054U CN 202320732315 U CN202320732315 U CN 202320732315U CN 219671054 U CN219671054 U CN 219671054U
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- 239000004567 concrete Substances 0.000 title claims abstract description 71
- 239000011178 precast concrete Substances 0.000 claims abstract description 31
- 229910000831 Steel Inorganic materials 0.000 claims description 121
- 239000010959 steel Substances 0.000 claims description 121
- 239000002131 composite material Substances 0.000 claims description 35
- 230000003014 reinforcing effect Effects 0.000 claims description 9
- 239000011374 ultra-high-performance concrete Substances 0.000 claims description 7
- 238000005266 casting Methods 0.000 claims description 6
- 230000008859 change Effects 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 24
- 239000011150 reinforced concrete Substances 0.000 abstract description 11
- 230000008901 benefit Effects 0.000 abstract description 3
- 238000004132 cross linking Methods 0.000 description 27
- 238000000034 method Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 4
- 238000003466 welding Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000009407 construction method and process Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000011065 in-situ storage Methods 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 238000009417 prefabrication Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
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Abstract
The utility model discloses an integrally-hoisted prefabricated reinforced concrete combined small box girder, which comprises reinforced concrete combined girders which are distributed in parallel along a transverse bridge deck, wherein each reinforced concrete combined girder comprises a prefabricated girder and a prefabricated concrete bridge deck, the prefabricated girder comprises a girder bottom plate, girder webs symmetrically fixed above two sides of the girder bottom plate and two girder top plates, the upper surfaces of the girder top plates are connected with the prefabricated concrete bridge deck by bolts, and the lower surfaces of the girder top plates are fixedly connected with the upper parts of the girder webs on the same side; the precast concrete deck boards are provided with reserved notches at two ends along the longitudinal bridge deck for forming the continuous structure of the longitudinal bridge deck, and a splice seam for forming a transverse wet seam structure is arranged between two adjacent precast concrete deck boards along the transverse bridge deck direction. The utility model realizes unification with the precast concrete small box girder, ensures standardized, mechanized, factory-like and rapid construction of the upper structure of the bridge, saves investment and maximizes benefit.
Description
Technical Field
The utility model relates to the technical field of bridges, in particular to an integrally-hoisted prefabricated steel-concrete combined small box girder.
Background
At present, the span of the precast concrete small box girder bridge is usually 20-35 m, and as an assembled structure, the precast concrete small box girder bridge is easy to realize standardized, mechanized, factory and rapid construction, and is of a closed structure, so that the landscape effect is good. Compared with the simply supported and structurally continuous precast concrete small box girder, the bridge deck continuous precast concrete small box girder is simpler in construction process, the step of tensioning prestress in a hogging moment area is omitted, and the bridge girder is very widely applied to bridge construction.
However, the span of the precast concrete small box girder bridge is usually 20-35 m, so that the requirement of the span of more than 40m is difficult to adapt, particularly, for urban bridges, the span of the bridge is limited by the space under the bridge, and larger span of the bridge is often needed locally to span a key line position. For bridge span structures with larger spans, schemes such as prefabricated T beams, cast-in-place concrete box beams, steel structures, reinforced concrete combined structures and the like are often adopted. The scheme has defects, namely, the scheme is firstly inconsistent with the construction method and process of the prefabricated concrete small box girder, the standardized, mechanized, factory-like and rapid construction cannot be better achieved, the overall landscape difference with the prefabricated small box girder structure is larger, and the landscape coordination is poor. For each, the overall beam height of the prefabricated T beam is higher, and the landscape is poorer; the cast-in-place concrete box girder has low construction speed and large influence on the environment; the steel box girder structure has higher overall cost and poorer economy; the steel-concrete combined structure has various forms and various construction methods and processes, and cannot be unified with the construction process of the prefabricated small box girder well.
Disclosure of Invention
In order to overcome the defects, the utility model aims to provide the integrally-hoisted prefabricated steel-concrete combined small box girder, the scheme is easy to realize unification of the prefabricated concrete small box girder structure and the prefabricated steel-concrete combined small box girder structure in design and construction process, the significance of the scheme is that the problem that the bridge with the prefabricated concrete small box girder structure cannot meet the requirement of a larger local span position, the standardized, mechanized, factory-like and rapid construction of the upper structure of the whole bridge is realized, the investment is saved, and finally, optimization measures are provided in the design and construction process of the bridge, the overall and local stress of the bridge is improved, the maximization of benefit is realized, and the problems that the existing structure is difficult to adapt to the requirement of the span of more than 40m and the standardized production degree is lower are well solved.
In order to achieve the above purpose, the present utility model adopts the following technical scheme:
the utility model provides a prefabricated steel and concrete combination small box girder of integral hoisting, includes a plurality of steel and concrete combination beam that distributes along horizontal bridge floor parallel, every steel and concrete combination beam includes prefabricated girder steel and precast concrete deck of upper and lower equipment connection, the prefabricated girder steel includes girder steel bottom plate, the girder steel web of symmetry fixed in girder steel bottom plate both sides top, two girder steel roof that support precast concrete deck both sides bottom surface respectively, the upper surface of girder steel roof adopts the peg to be connected with precast concrete deck, the lower surface of girder steel roof and the upper portion fixed connection of girder steel web of same side; the prefabricated concrete bridge deck plates are provided with reserved notches at two ends along the longitudinal bridge deck for forming the continuous structure of the longitudinal bridge deck, and a splice seam for forming a transverse wet seam structure is arranged between two adjacent prefabricated concrete bridge deck plates along the transverse bridge deck direction.
Further, two girder steel webs on the same prefabricated girder steel are respectively and vertically connected with a plurality of transverse ribs, and the upper end and the lower end of each transverse rib are respectively and fixedly connected with a girder steel top plate and a girder steel bottom plate which are positioned on the same side. By arranging the transverse ribs, the stiffening effect can be achieved on the inside of the box girder, and the torsion resistance and distortion resistance of the box girder are improved.
Further, the inside of prefabricated girder steel is connected with a plurality of diaphragm along length direction, and the border of diaphragm respectively with girder steel roof, girder steel web, girder steel bottom plate fixed connection. Through setting up the diaphragm, can play the effect of stiffening to the inside of case roof beam, improve the anti-torsion distortion performance of case roof beam.
Further, a through hole is formed in the middle of the diaphragm plate.
Further, the steel beam webs on two adjacent steel-concrete composite beams along the transverse bridge deck direction are connected by adopting a transverse connection structure. Through setting up the cross-linked structure, can improve the wholeness of bridge.
Further, the cross-linking structure is an I-shaped steel section structure, the cross-linking structure comprises a cross-linking bottom plate, a cross-linking top plate and a cross-linking web plate connected between the cross-linking bottom plate and the cross-linking top plate, the cross-linking web plate is provided with cross-linking reinforcing ribs, two ends of the cross-linking web plate are respectively connected with the cross-linking bottom plate and the cross-linking top plate, a connecting plate extending towards the cross-linking structure is arranged on a steel beam web plate on the prefabricated steel beam, and the cross-linking web plate is connected with the connecting plate through bolts.
Further, two ends of the prefabricated steel beam are provided with closed section top plates connected with the steel beam top plates, and the closed section top plates, the two steel beam webs and the steel beam bottom plates form a closed section structure. Therefore, the arrangement of the closed section structure is adopted at the two ends of the prefabricated steel beam in a certain range, so that the torsion resistance of the structure can be improved, and the stability of the steel-concrete combined small box girder during hoisting and use can be improved.
Further, the thickness of precast concrete decking is gradual change altitude setting, precast concrete decking has the biggest decking thickness in the position of being connected with the girder steel roof, precast concrete decking's middle part has minimum decking thickness. The adoption of the concrete bridge deck with gradually changed heights can reduce the dead weight of the structure and improve the crossing capacity of the structure.
Further, the longitudinal bridge deck continuous structure and the transverse wet joint structure are formed by casting ultra-high performance concrete, so that strong bond strength of the ultra-high performance concrete can be utilized, and overall connection strength is provided.
Further, reserve notch with the concatenation seam all is equipped with the reserved reinforcing bar that stretches out, and the reinforcing bar that is arranged in vertical bridge floor continuous structure adopts overlap joint mode to be connected with the reinforcing bar that is arranged in horizontal wet seam structure, so, the welded work load is needed to this kind of reinforcing bar in the conventional structure that has significantly reduced, further realizes the construction of rapidization.
Compared with the prior art, the utility model provides the integrally-hoisted prefabricated steel-concrete combined small box girder, which has the following beneficial effects:
(1) The structure of the utility model is applicable to large span and can be used for large span bridge span of crossing key line bits by local nodes.
(2) The steel-concrete combined small box girder adopts the shape, web slope and girder spacing which are consistent with those of the conventional precast concrete small box girder, and has good coordination with the conventional precast concrete small box Liang Jingguan.
(3) The single prefabricated reinforced concrete composite beam is prefabricated by adopting a factory, the reinforced concrete composite structure is formed and then is integrally hoisted to the bridge position, and the combined stress performance of the reinforced concrete composite beam is fully utilized, so that compared with the composite structure that a steel beam is firstly installed and then a concrete bridge deck is poured, the stress performance of the composite beam can be improved, and the steel consumption of the steel beam is reduced; in addition, the single steel-concrete composite beam has smaller hoisting weight, lower requirement on hoisting machinery, saves the cost of temporary piers, a large number of cast-in-situ measures and the like by integral hoisting, and realizes rapid construction.
(4) The prefabricated steel beam adopts a closed section structure in a certain range of beam ends except for the transverse ribs and the transverse partition plates to improve the torsion resistance of the whole structure; the transverse connection structures are arranged at certain intervals between the prefabricated steel beams, so that the structural integrity is good, and the transverse connection structures between the prefabricated steel beams are connected through bolts, so that the prefabricated steel beams are beneficial to factory prefabrication and rapid construction.
(5) The reserved notch for continuous bridge deck connection is arranged, the prefabricated steel-concrete combined small box girders are connected with each other, and the longitudinal bridge deck continuous structure is adopted between the steel-concrete combined small box girders and the prefabricated concrete small box girders in the longitudinal bridge direction, so that the construction process is simple; the longitudinal bridge deck continuous structure and the transverse wet joint structure are formed by casting ultra-high performance concrete, so that strong bond strength of the ultra-high performance concrete is utilized; the steel bars between the longitudinal bridge deck continuous structure and the transverse wet joint structure can be connected in a lap joint mode, so that the workload of welding the steel bars in a conventional structure is greatly reduced, and rapid construction is further realized.
(6) The adoption of the concrete bridge deck with gradually changed heights can reduce the dead weight of the structure and improve the crossing capacity of the structure.
(7) By the optimization measures provided for the design of the reinforced concrete combined small box girder, the overall and local stress of the bridge is improved, the construction process of the reinforced concrete combined small box girder is perfected, unification with the precast concrete small box girder is realized, standardized, mechanized, factory-like and rapid construction of the upper structure of the bridge is ensured, investment is saved, and the maximization of benefits is realized.
Drawings
In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the utility model, and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.
FIG. 1 is a plan view of a steel-concrete composite box girder of the present utility model;
FIG. 2 is an elevation view of the steel-concrete composite small box girder of the present utility model;
FIG. 3 is an enlarged schematic view of the portion M in FIG. 2;
FIG. 4 is a cross-sectional view taken along the direction C-C in FIG. 1;
FIG. 5 is an enlarged schematic view of the portion N in FIG. 4;
FIG. 6 is a cross-sectional view taken along the direction D-D in FIG. 1;
FIG. 7 is a cross-sectional view taken along the direction E-E in FIG. 1;
fig. 8 is a cross-sectional view taken along the direction F-F in fig. 1.
Reference numerals: 1. a steel-concrete composite beam; 11. prefabricating a steel beam; 111. a steel beam bottom plate; 112. a steel beam web; 113. a steel girder top plate; 114. a cross rib; 115. a diaphragm; 116. a through hole; 117. a connecting plate; 12. prefabricating a concrete bridge deck; 121. reserving a notch; 13. a peg; 14. a closed section top plate; 2. a longitudinal bridge deck continuous structure; 3. a transverse wet seam structure; 4. a splice joint; 5. a transverse connection structure; 51. a transverse connection bottom plate; 52. a transverse connection top plate; 53. a transverse web; 54. transverse connection reinforcing ribs; 6. a bolt; l1, the span length of the steel-concrete composite beam; l2, length of the closed-form section structure; h1, the total beam height of the steel-concrete composite beam; h2, prefabricating the height of the steel beam; h3, maximum bridge deck thickness; h4, minimum bridge deck thickness; b1, bridge deck width; b2, spacing between steel-concrete composite beams; b3, the top spacing of the steel beam webs.
Detailed Description
The technical solutions of the present utility model will be clearly and completely described below by means of detailed embodiments in conjunction with the accompanying drawings, and it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Referring to fig. 1 to 8, the present embodiment provides an integrally-hoisted prefabricated steel-concrete composite small box girder, which comprises a plurality of steel-concrete composite girders 1 distributed in parallel along a transverse bridge deck. Each steel-concrete composite girder 1 comprises a prefabricated steel girder 11 and a prefabricated concrete bridge deck 12 which are assembled and connected up and down. The precast steel beam 11 comprises a steel beam bottom plate 111, steel beam webs 112 symmetrically fixed above two sides of the steel beam bottom plate 111, and two steel beam top plates 113 respectively supporting bottom surfaces of two sides of the precast concrete deck 12. The upper surface of the girder steel roof 113 is connected with the precast concrete deck 12 by using bolts 13, and the lower surface of the girder steel roof 113 is fixedly connected with the upper part of the girder steel web 112 on the same side. The girder steel roof is located the top of prefabricated girder steel, is its top flange and bears compressive stress for support precast concrete decking. The steel beam web adopts a steel plate to bear the shearing stress of the upper structure, and the width and the slope of the upper opening are consistent with those of the conventional precast concrete small box beam. The steel beam bottom plate adopts a rectangular steel plate and bears the action of tensile stress. The precast concrete bridge deck is produced by adopting a factory prefabrication method, and is installed at the top of a precast steel beam through a peg before being hoisted by a steel-concrete composite beam. The precast concrete deck boards 12 are provided with reserved notches 121 for forming the longitudinal bridge deck continuous structure 2 at two ends along the longitudinal bridge deck, and a splicing seam 4 for forming the transverse wet seam structure 3 is arranged between two adjacent precast concrete deck boards 12 along the transverse bridge deck direction. The transverse wet joint structure is used for connecting the precast concrete bridge deck plates at the top into a whole, and the longitudinal bridge deck connecting structure is arranged in the reserved notch between the adjacent beam spans to realize bridge deck continuity of the simply supported beams.
In the present embodiment, referring to fig. 1, 3 to 5, as an example, the span length L1 of the reinforced concrete composite beam is 45m, and the total beam height h1 of the reinforced concrete composite beam is 2.1m; the bridge deck width B1 is 21m, the steel-concrete composite beam spacing B2 is 2950mm, and 7 steel-concrete composite beams are arranged along the transverse bridge deck direction. Taking 1850mm of the height h2 of the prefabricated steel beam; the thickness of the steel beam top plate is 20mm, and the width of the steel beam top plate is 400mm; the thickness of the steel beam web is 14mm, and the slope of the steel beam web is 1:4, taking 1770mm of the top interval B3 of the steel beam web; the thickness of the steel beam bottom plate is 24 mm-32 mm, and the midspan is a larger value. The width of the splice seam is 400mm; the length of the reserved notch is 1200mm, and the depth of the reserved notch is 100mm.
In some specific embodiments, referring to fig. 1 and 6, two steel beam webs 112 on the same prefabricated steel beam 11 are respectively and vertically connected with a plurality of transverse ribs 114, and the upper and lower ends of the transverse ribs 114 are respectively and fixedly connected with a steel beam top plate 113 and a steel beam bottom plate 111 on the same side. By arranging the transverse ribs, the stiffening effect can be achieved on the inside of the box girder, and the torsion resistance and distortion resistance of the box girder are improved.
In some specific embodiments, referring to fig. 1, 4, 5 and 8, a plurality of diaphragm plates 115 are connected to the prefabricated steel beams 11 along the length direction, and edges of the diaphragm plates 115 are fixedly connected to the steel beam top plate 113, the steel beam web 112 and the steel beam bottom plate 111 respectively. Through setting up the diaphragm, can play the effect of stiffening to the inside of case roof beam, improve the anti-torsion distortion performance of case roof beam. Specifically, a through hole 116 is formed in the middle of the diaphragm 115.
By way of example, two adjacent diaphragms 115 are spaced apart by 6 m; the cross ribs 114 are distributed along the length direction of the precast steel beam 11 at intervals of 2m, and the cross ribs 114 are distributed with the cross partitions 115 at intervals of 2 m.
In some specific embodiments, referring to fig. 1, 4 and 5, the steel beam webs 112 on two steel-concrete composite beams 1 adjacent in the transverse deck direction are connected by using the transverse connection structure 5. Through setting up the cross-linked structure, can improve the wholeness of bridge.
Specifically, as shown in fig. 5, the cross-linking structure 5 is an i-section steel structure, the cross-linking structure 5 includes a cross-linking bottom plate 51, a cross-linking top plate 52, and a cross-linking web 53 connected between the cross-linking bottom plate 51 and the cross-linking top plate 52, the cross-linking web 53 is provided with cross-linking reinforcing ribs 54 with two ends respectively connected with the cross-linking bottom plate 51 and the cross-linking top plate 52, a steel beam web 112 on the prefabricated steel beam 11 is provided with connection plates 117 extending and distributed towards the cross-linking structure 5, and the cross-linking web 53 is connected with the connection plates 117 by bolts 6. As an example, the transverse coupling structures are distributed and arranged at intervals of 10.5 m-12 m along the longitudinal bridge deck direction.
In some specific embodiments, referring to fig. 1 and 5, two ends of the prefabricated steel beam 11 are provided with closed section top plates 14 connected with a steel beam top plate 113, and the closed section top plates 14, the two steel beam top plates 113, the two steel beam webs 112 and the steel beam bottom plate 111 form a closed section structure. Therefore, the arrangement of the closed section structure is adopted at the two ends of the prefabricated steel beam in a certain range, so that the torsion resistance of the structure can be improved, and the stability of the steel-concrete combined small box girder during hoisting and use can be improved. By way of example, the length L2 of the closed form cross-sectional structure is 2800.
In some specific embodiments, as shown in fig. 5, the thickness of the precast concrete deck 12 is set to be gradually changed in height, the precast concrete deck 12 has a maximum deck thickness h3 at a portion connected with the girder top plate 113, and a middle portion of the precast concrete deck 12 has a minimum deck thickness h4. The adoption of the concrete bridge deck with gradually changed heights can reduce the dead weight of the structure and improve the crossing capacity of the structure. By way of example, the maximum bridge deck thickness h3 is 250mm and the minimum bridge deck thickness h4 is 200mm.
In some embodiments, the longitudinal deck continuous structure 2 and the transverse wet joint structure 3 are formed by casting ultra-high performance concrete, so that strong bond strength of the ultra-high performance concrete can be utilized to provide overall connection strength.
In some specific embodiments, the reserved slots 121 and the splicing seams 4 are respectively provided with an extended reserved reinforcing steel bar, and the reinforcing steel bars in the longitudinal bridge deck continuous structure and the reinforcing steel bars in the transverse wet seam structure are connected in a lap joint manner, so that the workload of welding the reinforcing steel bars in the conventional structure is greatly reduced, and the rapid construction is further realized. As an example, the extension length of the reserved rebar is 35cm.
During construction, the main flow of the rapid construction method for integrally hoisting the prefabricated steel-concrete combined small box girder can be divided into the steps of producing and preparing the prefabricated steel girder, welding studs, producing and preparing the prefabricated concrete bridge deck, transporting the prefabricated and installed steel-concrete combined girder in place, hoisting the steel-concrete combined girder, installing a transverse connection structure, casting a transverse wet joint structure and a longitudinal bridge deck continuous structure, casting a leveling layer in situ, installing auxiliary devices, and ensuring that the site construction procedure is consistent with that of the prefabricated concrete small box girder and realizing standardized, mechanized and factory rapid construction.
The concrete operation can adopt the conventional bridge construction operation. The transportation conditions at the bridge position are limited, the bridge which cannot realize whole span transportation can be transported to a construction site in a segmented mode, and the steel-concrete composite beam is hoisted after the assembly is completed and a composite structure is formed.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.
Claims (10)
1. The utility model provides a prefabricated steel and concrete combination small box roof beam of integral hoisting, includes a plurality of steel and concrete combination roof beam of following horizontal bridge floor parallel distribution, its characterized in that: each steel-concrete composite beam comprises a prefabricated steel beam and a prefabricated concrete bridge deck which are assembled and connected up and down, wherein the prefabricated steel beam comprises a steel beam bottom plate, steel beam webs symmetrically fixed above two sides of the steel beam bottom plate, and two steel beam top plates respectively supporting the bottom surfaces of two sides of the prefabricated concrete bridge deck, the upper surfaces of the steel beam top plates are connected with the prefabricated concrete bridge deck by bolts, and the lower surfaces of the steel beam top plates are fixedly connected with the upper parts of the steel beam webs on the same side; the prefabricated concrete bridge deck plates are provided with reserved notches at two ends along the longitudinal bridge deck for forming the continuous structure of the longitudinal bridge deck, and a splice seam for forming a transverse wet seam structure is arranged between two adjacent prefabricated concrete bridge deck plates along the transverse bridge deck direction.
2. The integrally-hoisted prefabricated steel-concrete composite small box girder according to claim 1, wherein: two girder steel webs on the same prefabricated girder steel are respectively and vertically connected with a plurality of transverse ribs, and the upper end and the lower end of each transverse rib are respectively and fixedly connected with a girder steel top plate and a girder steel bottom plate which are positioned on the same side.
3. The integrally-hoisted prefabricated steel-concrete composite small box girder according to claim 2, wherein: the inside of prefabricated girder steel is connected with a plurality of diaphragm along length direction, and the border of diaphragm is respectively with girder steel roof, girder steel web, girder steel bottom plate fixed connection.
4. A integrally-hoisted prefabricated steel-concrete composite small box girder according to claim 3, characterized in that: and a through hole is formed in the middle of the diaphragm plate.
5. The integrally-hoisted prefabricated steel-concrete composite small box girder according to claim 1, wherein: and steel beam webs on two adjacent steel-concrete composite beams along the transverse bridge deck direction are connected by adopting a transverse connection structure.
6. The integrally-hoisted prefabricated steel-concrete composite small box girder of claim 5, wherein: the transverse connection structure is an I-shaped steel section structure, the transverse connection structure comprises a transverse connection bottom plate, a transverse connection top plate and a transverse connection web plate connected between the transverse connection bottom plate and the transverse connection top plate, the transverse connection web plate is provided with transverse connection reinforcing ribs, two ends of each transverse connection reinforcing rib are respectively connected with the transverse connection bottom plate and the transverse connection top plate, the steel beam web plate on the prefabricated steel beam is provided with connecting plates extending towards the transverse connection structure, and the transverse connection web plate is connected with the connecting plates through bolts.
7. The integrally-hoisted prefabricated steel-concrete composite small box girder according to claim 1, wherein: the two ends of the prefabricated steel beam are provided with closed section top plates connected with the steel beam top plates, and the closed section top plates, the two steel beam webs and the steel beam bottom plates form a closed section structure.
8. The integrally-hoisted prefabricated steel-concrete composite small box girder according to claim 1, wherein: the thickness of precast concrete decking is the gradual change altitude setting, precast concrete decking has the biggest decking thickness in the position of being connected with the girder steel roof, the middle part of precast concrete decking has minimum decking thickness.
9. The integrally-hoisted prefabricated steel-concrete composite small box girder according to claim 1, wherein: the longitudinal bridge deck continuous structure and the transverse wet joint structure are formed by casting ultra-high performance concrete.
10. The integrally-hoisted prefabricated steel-concrete composite small box girder according to claim 1, wherein: the reserved notch and the splicing seams are provided with reserved steel bars which extend out, and the steel bars in the longitudinal bridge deck continuous structure are connected with the steel bars in the transverse wet joint structure in a lap joint mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202320732315.XU CN219671054U (en) | 2023-04-06 | 2023-04-06 | Steel-concrete combined small box girder prefabricated by integral hoisting |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202320732315.XU CN219671054U (en) | 2023-04-06 | 2023-04-06 | Steel-concrete combined small box girder prefabricated by integral hoisting |
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| CN219671054U true CN219671054U (en) | 2023-09-12 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117328687A (en) * | 2023-11-30 | 2024-01-02 | 北京建工集团有限责任公司 | Method for installing steel structure-concrete combined structure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117328687A (en) * | 2023-11-30 | 2024-01-02 | 北京建工集团有限责任公司 | Method for installing steel structure-concrete combined structure |
| CN117328687B (en) * | 2023-11-30 | 2024-02-23 | 北京建工集团有限责任公司 | Method for installing steel structure-concrete combined structure |
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