CN215758473U - Steel-concrete combined simply-supported T-beam bridge - Google Patents
Steel-concrete combined simply-supported T-beam bridge Download PDFInfo
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- CN215758473U CN215758473U CN202122232380.XU CN202122232380U CN215758473U CN 215758473 U CN215758473 U CN 215758473U CN 202122232380 U CN202122232380 U CN 202122232380U CN 215758473 U CN215758473 U CN 215758473U
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Abstract
The utility model discloses a steel-concrete combined simply-supported T-beam bridge, which comprises steel-concrete combined T-beam boundary beams at two ends, wherein a plurality of steel-concrete combined T-beam middle beams are sequentially assembled between the two steel-concrete combined T-beam boundary beams, each steel-concrete combined T-beam boundary beam or each steel-concrete combined T-beam middle beam comprises an upper T-shaped concrete beam and a lower double-web steel beam, each upper T-shaped concrete beam comprises a T-beam concrete top plate, a top plate transverse connecting section is arranged between the two adjacent steel-concrete combined T-beam middle beams and between the steel-concrete combined T-beam middle beam and the steel-concrete combined T-beam boundary beam, each top plate transverse connecting section comprises a steel longitudinal beam, the T-beam concrete top plate is provided with embedded I-beams on the surface connected with the steel longitudinal beams, and two end surfaces of each steel longitudinal beam are respectively connected with the adjacent embedded I-beams; the utility model has the advantages of large span, high bearing capacity and reliable transverse connection.
Description
Technical Field
The utility model relates to the technical field of bridge and culvert engineering in the transportation industry, in particular to a steel-concrete combined simply-supported T-beam bridge.
Background
The T-shaped beam bridge is a beam bridge which takes a beam with a T-shaped cross section as a main bearing structure. When the load on the bridge generates positive bending moment, the beam is made into a T shape with a big top and a small bottom, and the lower edge is provided with the reinforcement, so that the large compressive strength of the concrete and the high tensile strength of the reinforcement are fully utilized, the material is saved compared with a rectangular beam bridge, and the dead weight is reduced. The prestressed concrete T-beam bridge is widely applied to highway bridges and has outstanding advantages in the span range of 25m-40m due to low beam height, small concrete consumption, low manufacturing cost, adoption of a prefabricated and assembled construction process and simple construction.
China (CN201922267749.3) discloses a prefabricated assembled corrugated steel web combined T-beam bridge, which comprises a plurality of corrugated steel web combined T-beams and bridge deck base plates formed by splicing a plurality of prefabricated concrete bridge decks and arranged on the upper parts of the plurality of corrugated steel web combined T-beams, wherein the lower part of each corrugated steel web combined T-beam is provided with a lower flange concrete base, and a plurality of transverse connecting systems are arranged between every two adjacent corrugated steel web combined T-beams. The utility model has the advantages that: the construction process is simple, the construction period is short, the self weight is lighter, the beam height is lower, the shearing resistance is higher, the lower flange concrete prestress efficiency is higher, the buckling rigidity of the web is higher, the transverse connection is more reliable, the contraction and creep effect of the concrete top and bottom plates at the operation stage has smaller influence on the web, but the positive bending moment of the bridge in the midspan is very large, so that the midspan is in a higher tensile stress level for a long time, and the longitudinal crack is easy to occur on the midspan even if the bottom plates are provided with prestress along with the increase of the operation time and the load of the bridge.
Traditional prestressed concrete simply supported T girder bridge is because structural constraint, and single span hardly breaks through 50m to the moment of flexure is great in the bridge span, and span web lower edge and bottom plate receive very big tensile stress, even set up prestressing force, the longitudinal crack of T beam bottom plate and web also sometimes takes place during the bridge operation. The expansion of the cracks weakens the overall rigidity of the beam body, reduces the bearing capacity and influences the driving safety of the bridge. Therefore, the steel-concrete combined simply-supported T-beam bridge is provided, the stress characteristic of the bridge is optimized, the bearing capacity of a bottom plate and a web plate of the bridge is improved, more reliable connection rigidity is transversely ensured between the T-beams, transverse connection diseases are prevented, and the steel-concrete combined simply-supported T-beam bridge has obvious engineering practical value.
Disclosure of Invention
The utility model aims to solve the problems in the prior art and provides a steel-concrete combined simply-supported T-beam bridge which is large in span, high in bearing capacity and reliable in transverse connection.
In order to achieve the purpose, the utility model adopts the technical scheme that: a steel-concrete combined simply-supported T-beam bridge comprises steel-concrete combined T-beam boundary beams at two ends, a plurality of steel-concrete combined T-beam middle beams are sequentially spliced between the two steel-concrete combined T-beam boundary beams, each steel-concrete combined T-beam boundary beam or each steel-concrete combined T-beam middle beam comprises an upper T-shaped concrete beam and a lower double-web steel beam, the upper T-shaped concrete beam comprises a T-beam concrete top plate, top plate transverse connecting sections are arranged between two adjacent steel-concrete combined T-beam middle beams and between the steel-concrete combined T-beam middle beam and the steel-concrete combined T-beam boundary beam, the transverse connecting section of the top plate comprises a steel longitudinal beam, the surfaces of the T-beam concrete top plate connected with the steel longitudinal beam are provided with embedded I-shaped steel, the two end faces of the steel longitudinal beam are respectively connected with the adjacent embedded I-shaped steel, and two steel webs are arranged in the lower double-web steel beam.
In the scheme, the steel-concrete combined simply-supported T-beam bridge comprises steel-concrete combined T-beam boundary beams at two ends, a plurality of steel-concrete combined T-beam middle beams are sequentially assembled between the two steel-concrete combined T-beam boundary beams, the steel-concrete combined T-beam boundary beams and the steel-concrete combined T-beam middle beams only have different pre-embedded I-steel quantity, the rest structures are the same, each steel-concrete combined T-beam boundary beam or the steel-concrete combined T-beam middle beam comprises an upper T-shaped concrete beam and a lower double-web steel beam, the tensile bearing capacity of a steel structure and the compressive bearing capacity of concrete can be fully exerted, the bearing capacity of the bridge is improved, the whole bridge does not need to be provided with a prestress structure, the upper T-shaped concrete beam comprises a T-beam concrete top plate to provide the supporting force of a bridge floor, and transverse connecting sections of the top plates are arranged between the two adjacent steel-concrete combined T-beam middle beams and between the steel-concrete combined T-beam middle beam and the steel-concrete combined T-beam boundary beams, the transverse connection section plays a role in connecting each bridge and supporting the bridge deck, the top plate transverse connection section comprises a steel longitudinal beam, the T-beam concrete top plate is provided with pre-buried I-beams on the surface connected with the steel longitudinal beam, the left and right end surfaces of the steel longitudinal beam are respectively adjacent to the pre-buried I-beams, the T-beam concrete top plate can be connected in a welding and bolt connection mode, two steel web plates are arranged in the lower double-web steel beam, so that the transverse rigidity of the steel web plates is increased, and the transverse bearing capacity is improved.
The utility model provides a steel-concrete combined simply-supported T-shaped girder bridge, which is constructed by firstly manufacturing a lower double-web steel girder in a factory, then a template is erected on a steel beam top plate of the lower double-web steel beam, an upper T-shaped concrete beam is prefabricated and poured, and the end part of the T-beam concrete top plate is provided with pre-embedded I-shaped steel to form a steel-concrete combined T-beam middle beam and a steel-concrete combined T-beam side beam, secondly, hoisting the steel-concrete combined T-beam middle beam and the steel-concrete combined T-beam side beam to corresponding bridge positions, welding steel longitudinal beams and T-beam top plates at the transverse connecting sections of the top plates, embedding I-shaped steel, connecting a plurality of T-beams, then pouring concrete in the transverse connecting sections of the top plates and concrete in the transverse partition plate connecting sections, transversely connecting the T-beams into a whole, finally integrally pouring a bridge deck cast-in-place layer and bridge deck pavement on the T-beam concrete top plates and the transverse connecting sections of the top plates, and constructing bridge deck auxiliary facilities and anti-collision guardrails.
Furthermore, the top surface of the lower double-web steel beam is provided with steel beam plate shear nails, and the upper T-shaped concrete beam and the lower double-web steel beam are connected through the steel beam plate shear nails.
The top surface of lower part double web girder steel is provided with girder steel board shear force nail, can be the welding setting, upper portion T shape concrete beam and lower part double web girder steel pass through girder steel board shear force nail connects, and a plurality of girder steel board shear force nail evenly distributed is at the top surface of lower part double web girder steel, guarantees the stability of connecting.
Further, upper portion T shape concrete beam still includes T roof beam concrete web, T roof beam concrete web is located the bottom surface of T roof beam concrete roof, be provided with roof longitudinal reinforcement, roof stirrup in the T roof beam concrete roof, be provided with web longitudinal reinforcement, web stirrup in the T roof beam concrete web, the two web girder steels in lower part include two the girder steel web, two the bottom surface of girder steel web is provided with girder steel bottom plate, two the top surface of girder steel web is provided with the girder steel roof, the equipartition formula sets up on the girder steel roof the girder steel board shear force nail.
The T-shaped concrete beam on the upper portion still includes T roof beam concrete web, T roof beam concrete web locates the bottom surface middle part position of T roof beam concrete roof plays support, connection effect, be provided with roof longitudinal reinforcement, roof stirrup in the T roof beam concrete roof, increase structural strength, be provided with web longitudinal reinforcement, web stirrup in the T roof beam concrete web, increase structural strength, the double web girder steel in lower part includes two the girder steel web, two the bottom surface of girder steel web is provided with girder steel bottom plate, and girder steel bottom plate is used for connecting the abutment support, two the top surface of girder steel web is provided with the girder steel roof, is used for connecting upper portion T-shaped concrete beam, the equipartition formula sets up on the girder steel roof girder steel board shear force nail, improves connection stability.
Further, the ratio of the height of the upper T-shaped concrete beam to the height of the lower double web steel beam is between 1/2-2/3.
The ratio of the height of the upper T-shaped concrete beam to the height of the lower double-web steel beam is 1/2-2/3, so that the tensile bearing capacity of the steel structure of the lower double-web steel beam and the compressive bearing capacity of the concrete of the upper T-shaped concrete beam can be fully exerted.
Further, the pre-buried I-steel of T roof beam roof board comprises I-steel roof board, I-steel bottom plate, and I-steel web, the steel longeron comprises longeron roof board, longeron bottom plate and longeron web, it has the roof-plate hole to open on the longeron roof board, it has the bottom plate hole to open on the longeron bottom plate, the steel longeron with pre-buried I-steel welding links to each other.
The T-beam top plate embedded joist steel is composed of a joist steel top plate, a joist steel bottom plate and a joist steel web plate, and is simple and stable in structure, the steel longitudinal beam is composed of a longitudinal beam top plate, a longitudinal beam bottom plate and a longitudinal beam web plate and can be joist steel, the structure is simple and stable, a top plate hole is formed in the longitudinal beam top plate, a bottom plate hole is formed in the longitudinal beam bottom plate, the top plate hole and the bottom plate hole are used for pouring concrete and can be circular or polygonal holes, the size and the interval can be set according to pouring requirements, and the steel longitudinal beam is welded with the embedded joist steel and is stably connected.
Further, the both sides of T roof beam concrete web all are provided with a plurality of dry concrete cross slabs, adjacent two be equipped with the cross slab linkage segment between the concrete cross slab, the concrete cross slab vertically sets up at bridge tip, 1/4 stride footpath department, stride well department along the bridge, the both sides of girder steel web are provided with the vertical stiffening rib of a plurality of girder steels, and the vertical stiffening rib of girder steel is 2-3m along the fore-and-aft interval that sets up of bridge.
The both sides of T roof beam concrete web all are provided with a plurality of dry concrete cross slabs for support bridge floor structure and gaining in strength, adjacent two be equipped with the cross slab linkage segment between the concrete cross slab, the cross slab linkage segment is located the bottom surface of roof transverse connection section for connect the concrete cross slab and gaining in strength, the concrete cross slab vertically sets up at two tip of bridge, 1/4 stride footpath department, stride the centre department along the bridge, along the vertical evenly distributed of bridge, increases bridge stability, the both sides of girder steel web are provided with the vertical stiffening rib of a plurality of girder steels, are used for increasing the intensity of girder steel web, and the vertical stiffening rib of girder steel is 2-3m along the fore-and-aft interval that sets up of bridge, can play good reinforcing effect.
Furthermore, the uniformly distributed longitudinal beam shear nails are arranged on the longitudinal beam top plate, and a bridge deck structure is arranged on the top surfaces of the T-beam concrete top plate and the transverse connecting section of the top plate.
The T-beam concrete roof and the roof transverse connection section top surface are provided with bridge deck structures, and the bridge deck structures are matched and fixed with the longitudinal beam shear nails.
Further, the bridge deck structure comprises a bridge deck cast-in-place layer, and bridge deck pavement is arranged on the top surface of the bridge deck cast-in-place layer.
The bridge deck structure comprises a bridge deck cast-in-place layer, the bridge deck cast-in-place layer is fixed with the longitudinal beam shear nails in a matched mode, and a bridge deck pavement is arranged on the top face of the bridge deck cast-in-place layer to form a bridge deck.
Further, the I-steel top plate and the longitudinal beam top plate are horizontally arranged, the I-steel top plate is welded with the longitudinal beam top plate, the I-steel bottom plate is welded with the longitudinal beam bottom plate, and the I-steel web plate is arranged inside the T-beam concrete top plate.
The I-steel top plate and the longitudinal beam top plate are horizontally arranged and used for supporting a bridge deck, the I-steel top plate is welded with the longitudinal beam top plate, the I-steel bottom plate is welded with the longitudinal beam bottom plate to reinforce the stability of a joint, and the I-steel web plate is arranged in the T-beam concrete top plate, is stably connected and can be integrally prefabricated.
Furthermore, the bottom of the lower double-web steel beam is provided with an abutment support.
The bottom of lower part double web girder steel is provided with the abutment support for fixed lower part double web girder steel.
Compared with the prior art, the utility model has the beneficial effects that:
firstly, a steel-concrete combined T-beam structure is adopted, the middle lower part of the T-beam adopts a steel structure, the upper part of the T-beam adopts a concrete structure, under the action of bridge face load, the middle lower part of the T-beam is pulled, the upper part of the T-beam is pressed, the tensile bearing capacity of the steel structure and the compressive bearing capacity of concrete can be fully exerted, the whole structure does not need to be provided with prestress, the construction process is simplified, the bearing capacity of a web plate and a bottom plate is greatly improved, and the maximum span of the traditional prestressed concrete simply-supported T-beam can be broken through;
the two T-shaped beams are transversely connected with the steel longitudinal beam through the embedded I-shaped steel, so that the rigidity of the transverse connecting section of the top plate is obviously improved, the transverse connecting capacity between adjacent beam bodies is increased, the transverse connection is more reliable, and the transverse connecting diseases of the top plates of the T-shaped beams are avoided;
thirdly, a double-web plate structure is adopted in the lower double-web plate steel beam, so that the transverse rigidity of a steel beam web plate is increased, the transverse bearing capacity is improved, and a steel beam vertical stiffening rib is arranged on the steel beam web plate, so that the stability of the steel beam web plate is improved, and the local buckling instability of the steel beam web plate is avoided;
and fourthly, the lower double-web steel beam and the upper T-shaped concrete beam are factory prefabricated components, a steel-concrete combined T-beam middle beam and a steel-concrete combined T-beam side beam are formed after factory prefabrication is completed, the manufacturing is simple, construction site construction is carried out by adopting an assembly mode after the manufacturing is completed, the construction process is simple and convenient, and the construction period is greatly shortened.
Drawings
FIG. 1 is a schematic perspective view of the present invention;
FIG. 2 is a schematic cross-sectional view of the present invention;
FIG. 3 is a left side view of FIG. 1;
FIG. 4 is a schematic cross-sectional view of an upper T-shaped concrete beam;
FIG. 5 is a cross-sectional view of a lower dual-web steel beam;
FIG. 6 is a schematic cross-sectional view of a steel-concrete composite T-beam boundary beam;
FIG. 7 is a schematic cross-sectional view of a steel-concrete composite T-beam center sill;
FIG. 8 is a schematic diagram of transverse connection of two adjacent steel-concrete combined T-shaped beams;
FIG. 9 is an enlarged view of a portion of FIG. 8 at A;
FIG. 10 is a three-dimensional structure view of an embedded I-steel of a T-beam concrete top plate;
FIG. 11 is a perspective view of a steel stringer;
FIG. 12 is a three-dimensional structure view of a middle beam of a monolithic steel-concrete composite T-beam;
FIG. 13 is a three-dimensional structure view of a single steel-concrete combined T-beam boundary beam;
FIG. 14 is a three-dimensional structure view of a transverse connection of two adjacent steel-concrete combined T-shaped beams;
in the attached drawings, 1, an upper T-shaped concrete beam; 2. a lower double web steel beam; 1a, combining steel and concrete into a T-shaped beam middle beam; 1b, combining steel and concrete to form a T-shaped beam boundary beam; 11. a T-beam concrete top plate; 12. t-beam concrete webs; 13. top plate longitudinal steel bars; 14. a roof stirrup; 15. web longitudinal steel bars; 16. web stirrups; 21. a steel beam web; 22. a steel beam bottom plate; 23. a steel beam vertical stiffener; 24. a steel beam top plate; 25. steel beam plate shear nails; 3. pre-burying I-shaped steel; 31. a joist steel top plate; 32. an I-steel base plate; 33. an I-steel web; 4. a steel stringer; 41. a stringer top plate; 41a, a top plate hole; 42. a longitudinal beam bottom plate; 42a, a bottom plate hole; 43. a stringer web; 44. a longitudinal beam shear pin; 5. a concrete diaphragm plate; 51. a diaphragm plate connecting section; 6. a top plate transverse connecting section; 7. a bridge deck cast-in-place layer; 8. paving a bridge deck; 9. anticollision barrier.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
As shown in fig. 1 to 14, a steel-concrete composite simply-supported T-beam bridge includes steel-concrete composite T-beam boundary beams 1b at two ends, a plurality of steel-concrete composite T-beam middle beams 1a are sequentially assembled between two steel-concrete composite T-beam boundary beams 1b, each of the steel-concrete composite T-beam boundary beams 1b and the steel-concrete composite T-beam middle beam 1a includes an upper T-shaped concrete beam 1 and a lower double-web steel beam 2, the upper T-shaped concrete beam 1 includes a T-beam concrete top plate 11, a top plate transverse connecting section 6 is disposed between two adjacent steel-concrete composite T-beam middle beams 1a and between the adjacent steel-concrete composite T-beam middle beam 1a and the steel-concrete composite T-beam boundary beam 1b, the top plate transverse connecting section 6 includes a steel longitudinal beam 4, the T-beam concrete top plate 11 is provided with pre-embedded i-steel 3 on a surface connected with the steel longitudinal beam 4, the two end faces of the steel longitudinal beam 4 are respectively connected with the adjacent embedded I-shaped steel 3, and two steel webs are arranged in the lower double-web steel beam 2.
In the scheme, the steel-concrete combined simply-supported T-beam bridge comprises steel-concrete combined T-beam boundary beams 1b at two ends, wherein a plurality of steel-concrete combined T-beam middle beams 1a are sequentially assembled between the steel-concrete combined T-beam boundary beams 1b, the steel-concrete combined T-beam boundary beams 1b and the steel-concrete combined T-beam middle beams 1a only have different quantity of pre-embedded I-shaped steel 3, the rest structures are the same, each steel-concrete combined T-beam boundary beam 1b and the steel-concrete combined T-beam middle beam 1a comprise an upper T-shaped concrete beam 1 and a lower double-web steel beam 2, the tensile bearing capacity of a steel structure and the compressive bearing capacity of concrete can be fully exerted, the bearing capacity is improved, a prestress structure is not required to be arranged on the whole bridge, the upper T-shaped concrete beam 1 comprises a T-beam concrete top plate 11 to provide the supporting force of a bridge floor, and the steel-concrete combined T-beam boundary beams 1a, a steel-concrete combined T-beam and a steel-concrete beam 1a steel-concrete beam and a beam 1a between the two adjacent steel-concrete combined T-beam, Adjacent the steel and concrete combination T roof beam in the roof beam 1a with all be provided with roof transverse connection section 6 between the steel and concrete combination T roof beam boundary beam 1b, transverse connection section plays the effect of connecting each bridge, support bridge floor, roof transverse connection section 6 includes steel longeron 4, T roof beam concrete roof 11 with all be provided with pre-buried I-steel 3 on the face that steel longeron 4 is connected, steel longeron 4 about both ends face respectively with adjacent pre-buried I-steel 3 is connected, can connect through welding, bolted connection's mode, be provided with two steel webs in the two web girder steel 2 in lower part for 21 lateral rigidity of girder steel web increase, horizontal bearing capacity improves.
A prestressed concrete simply-supported T-beam bridge for a certain road has a single-hole span of 50m, a total bridge deck width of 12.5m and 3 unidirectional lanes. The steel-concrete combined simply-supported T-beam bridge provided by the utility model is formed by prefabricating and assembling two steel-concrete combined T-beam middle beams 1a and two steel-concrete combined T-beam side beams 1b, wherein each steel-concrete combined T-beam side beam 1b and each steel-concrete combined T-beam middle beam 1a are assembled by an upper T-shaped concrete beam 1 and a lower double-web steel beam 2 through steel beam plate shear nails 25. The beam height of the steel-concrete combined T-beam middle beam 1a and the beam height of the steel-concrete combined T-beam side beam 1b are both 3m, the height of the upper T-shaped concrete beam 1 is 1.1m, the height of the lower double-web steel beam 2 is 1.9m, the transverse width of the T-beam concrete top plate 11 is 2.75m, the transverse width of the top plate transverse connecting section 6 is 0.5m, concrete cross-plates 5 are arranged on two sides of the T-beam concrete web 12 of the upper T-shaped concrete beam 1, two adjacent concrete cross-plates 5 are connected through a cross-plate connecting section 51, the concrete cross-plates 5 are longitudinally arranged at the end part, the 1/4 span and the span along the bridge, steel beam vertical stiffening ribs 23 are arranged on two sides of the steel beam web 21 of the lower double-web steel beam 2, and the arrangement distance of the steel beam vertical stiffening ribs 23 along the longitudinal direction of the bridge is 2.5 m. During construction, firstly, a lower double-web steel beam 2 is manufactured in a factory, then a template is erected on a steel beam top plate 24 of the lower double-web steel beam 2, an upper T-shaped concrete beam 1 is prefabricated and poured, and the end part of the T-beam concrete top plate 11 is provided with pre-embedded I-shaped steel 3 to form a steel-concrete combined T-beam middle beam 1a and a steel-concrete combined T-beam side beam 1b, secondly, hoisting the steel-concrete combined T-shaped beam middle beam 1a and the steel-concrete combined T-shaped beam edge beam 1b to corresponding bridge positions, welding steel longitudinal beams 4 and T-beam top plate embedded I-beams 3 at the top plate transverse connecting section 6, connecting a plurality of T-beams, pouring concrete in the top plate transverse connecting section 6 and concrete in the diaphragm plate connecting section 51, transversely connecting the T-beams into a whole, finally integrally pouring a bridge deck cast-in-place layer 7 and a bridge deck pavement 8 on the T-beam concrete top plate 11 and the top plate transverse connecting section 6, and constructing bridge deck auxiliary facilities and anti-collision guardrails 9. By adopting the steel-concrete combined T-beam structure provided by the utility model, the middle lower part and the middle upper part of the T-beam adopt steel structures, the middle lower part and the middle upper part of the T-beam are in tension and the middle upper part of the T-beam is in compression under the action of the operation load of the bridge, the tensile bearing capacity of the steel structures and the compressive bearing capacity of concrete can be fully exerted, the whole structure does not need to be provided with prestress, the construction process is simplified, the bearing capacity of webs and bottom plates is greatly improved, the maximum span of the traditional prestressed concrete simply-supported T-beam can be broken through, and the single span can reach 50 m.
The utility model provides a steel-concrete combined simply-supported T-beam bridge, which is constructed by firstly manufacturing a lower double-web steel beam 2 in a factory, then erecting a template on a steel beam top plate 24 of the lower double-web steel beam 2, prefabricating and pouring an upper T-shaped concrete beam 1, arranging embedded I-beams 3 at the end part of a T-beam concrete top plate 11 to form a steel-concrete combined T-beam middle beam 1a and a steel-concrete combined T-beam side beam 1b, then hoisting the steel-concrete combined T-beam middle beam 1a and the steel-concrete combined T-beam side beam 1b to corresponding bridge positions, welding steel longitudinal beams 4 and T-beam top plate embedded paving steels 3 at a top plate transverse connecting section 6, connecting a plurality of T-beams, then pouring concrete in the top plate transverse connecting section 6 and concrete in a transverse partition plate connecting section 51, transversely connecting the T-beams into a whole, and finally integrally pouring a cast-in-place layer 7 and a bridge deck 8 on the T-beam concrete top plate 11 and the top plate transverse connecting section 6, and bridge deck auxiliary facilities and crash barriers 9 are constructed.
Further, the top surface of the lower double-web steel beam 2 is provided with a steel beam plate shear nail 25, and the upper T-shaped concrete beam 1 and the lower double-web steel beam 2 are connected through the steel beam plate shear nail 25.
The top surface of the lower double-web steel beam 2 is provided with steel beam plate shear nails 25 which can be welded, the upper T-shaped concrete beam 1 and the lower double-web steel beam 2 are connected through the steel beam plate shear nails 25, and the steel beam plate shear nails 25 are uniformly distributed on the top surface of the lower double-web steel beam 2, so that the connection stability is ensured.
Further, upper portion T shape concrete beam 1 still includes T roof beam concrete web 12, T roof beam concrete web 12 is located T roof beam concrete roof 11's bottom surface, be provided with roof longitudinal reinforcement 13, roof stirrup 14 in the T roof beam concrete roof 11, be provided with web longitudinal reinforcement 15, web stirrup 16 in the T roof beam concrete web 12, lower part double web girder steel 2 includes two girder steel web 21, two the bottom surface of girder steel web 21 is provided with girder steel bottom plate 22, two the top surface of girder steel web 21 is provided with girder steel roof 24, the equipartition formula sets up on girder steel roof 24 girder steel board shear force nail 25.
The upper T-shaped concrete beam 1 also comprises a T-beam concrete web 12, the T-beam concrete web 12 is arranged in the middle of the bottom surface of the T-beam concrete top plate 11 and plays a role in supporting and connecting, a top plate longitudinal steel bar 13 and a top plate stirrup 14 are arranged in the T-beam concrete top plate 11 to increase the structural strength, the T-shaped beam concrete web 12 is internally provided with web longitudinal steel bars 15 and web stirrups 16 to increase the structural strength, the lower double-web steel beam 2 comprises two steel beam webs 21, steel beam bottom plates 22 are arranged on the bottom surfaces of the two steel beam webs 21, the steel beam bottom plates 22 are used for connecting the abutment supports, steel beam top plates 24 are arranged on the top surfaces of the two steel beam webs 21 and are used for connecting the upper T-shaped concrete beam 1, the steel beam top plate 24 is uniformly provided with the steel beam plate shear nails 25, so that the connection stability is improved.
Further, the ratio of the height of the upper T-shaped concrete beam 1 to the height of the lower double-web steel beam 2 is between 1/2 and 2/3.
The ratio of the height of the upper T-shaped concrete beam 1 to the height of the lower double-web steel beam 2 is 1/2-2/3, so that the tensile bearing capacity of the steel structure of the lower double-web steel beam 2 and the compressive bearing capacity of the concrete of the upper T-shaped concrete beam 1 can be fully exerted.
Further, the T-beam top plate embedded I-steel 3 comprises an I-steel top plate 31, an I-steel bottom plate 32 and an I-steel web 33, the steel longitudinal beam 4 comprises a longitudinal beam top plate 41, a longitudinal beam bottom plate 42 and a longitudinal beam web 43, a top plate hole 41a is formed in the longitudinal beam top plate 41, a bottom plate hole 42a is formed in the longitudinal beam bottom plate 42, and the steel longitudinal beam 4 is connected with the embedded I-steel 3 in a welding mode.
The pre-buried I-steel of T roof board 3 comprises I-steel roof board 31, I-steel bottom plate 32 and I-steel web 33, and simple structure is stable, steel longeron 4 comprises longeron roof board 41, longeron bottom plate 42 and longeron web 43, can be the I-steel, and simple structure is stable, it has roof plate hole 41a to open on the longeron roof board 41, it has bottom plate hole 42a to open on the longeron bottom plate 42, and roof plate hole 41a, bottom plate hole 42a are used for concreting, and roof plate hole 41a, bottom plate hole 42a are circular, can set up size and interval according to pouring needs, steel longeron 4 with pre-buried I-steel 3 welding links to each other, connects stably.
Further, the both sides of T roof beam concrete web 12 all are provided with a plurality of dry concrete cross slabs 5, adjacent two be equipped with cross slab linkage segment 51 between the concrete cross slab 5, concrete cross slab 5 vertically sets up at bridge tip, 1/4 stride footpath department, stride middle department along the bridge, the both sides of girder steel web 21 are provided with the vertical stiffening rib 23 of a plurality of girder steels, and the vertical stiffening rib 23 of girder steel is 2-3m along the fore-and-aft interval that sets up of bridge.
The both sides of T roof beam concrete web 12 all are provided with a plurality of dry concrete cross slab 5 for support bridge floor structure and add intensity, adjacent two be equipped with the cross slab linkage segment 51 between the concrete cross slab 5, the cross slab linkage segment 51 is located the bottom surface of roof transverse connection section 6 for connect concrete cross slab 5 and add intensity, concrete cross slab 5 vertically sets up at two tip of bridge, 1/4 stride footpath department, stride the centre department along the bridge, along the vertical evenly distributed of bridge, increases bridge stability, the both sides of girder steel web 21 are provided with the vertical stiffening rib 23 of a plurality of girder steels, are used for increasing girder steel web 21's intensity, and the vertical stiffening rib 23 of girder steel is 2-3m along the vertical interval that sets up of bridge, can play good reinforcing effect.
Further, the uniformly distributed longitudinal beam shear nails 44 are arranged on the longitudinal beam top plate 41, and a bridge deck structure is arranged on the top surfaces of the T-beam concrete top plate 11 and the top plate transverse connecting section 6.
The uniformly distributed longitudinal beam shear nails 44 are arranged on the longitudinal beam top plate 41, the longitudinal beam shear nails 44 can be arranged in a welding mode, a bridge deck structure is arranged on the top surfaces of the T-beam concrete top plate 11 and the top plate transverse connecting section 6, and the bridge deck structure and the longitudinal beam shear nails 44 are matched and fixed.
Further, the bridge deck structure comprises a bridge deck cast-in-place layer 7, and bridge deck pavement 8 is arranged on the top surface of the bridge deck cast-in-place layer 7.
The bridge deck structure comprises a bridge deck cast-in-place layer 7, the bridge deck cast-in-place layer 7 is matched and fixed with the longitudinal beam shear nails 44, and the top surface of the bridge deck cast-in-place layer 7 is provided with a bridge deck pavement 8 to form a bridge deck.
Further, the i-steel top plate 31 and the longitudinal beam top plate 41 are horizontally arranged, the i-steel top plate 31 is welded to the longitudinal beam top plate 41, the i-steel bottom plate 32 is welded to the longitudinal beam bottom plate 42, and the i-steel web 33 is arranged inside the T-beam concrete top plate 11.
The I-steel top plate 31 and the longitudinal beam top plate 41 are horizontally arranged and used for supporting a bridge deck, the I-steel top plate 31 is welded with the longitudinal beam top plate 41, the I-steel bottom plate 32 is welded with the longitudinal beam bottom plate 42 to reinforce the stability of a joint, and the I-steel web plate 33 is arranged in the T-beam concrete top plate 11 and is stably connected and can be integrally prefabricated.
Further, the bottom of lower part double web girder steel 2 is provided with the abutment support.
The bottom of lower part double web girder steel 2 is provided with the abutment support for fixed lower part double web girder steel 2.
Example 2
The steel-concrete combined simply-supported T-beam bridge of the embodiment is further optimized on the basis of the embodiment 1:
further, the top plate hole 41a and the bottom plate hole 42a are used for casting concrete, and the top plate hole 41a and the bottom plate hole 42a are polygonal holes. The outer side of the upper part of the vertical stiffening rib of the steel beam is provided with an inclined plane.
Further, the bottom surface of the T-beam concrete top plate 11 is tapered.
The bottom surface of the T-beam concrete top plate 11 is provided with a taper, so that the thickness of the middle part of the top plate is increased, a reinforced supporting structure is formed, and the stability of a bridge deck is improved. Preferably, the taper is from 5 ° to 45 °.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. A steel-concrete combined simply-supported T-beam bridge is characterized by comprising steel-concrete combined T-beam boundary beams at two ends, a plurality of steel-concrete combined T-beam middle beams are sequentially spliced between the two steel-concrete combined T-beam boundary beams, each steel-concrete combined T-beam boundary beam or each steel-concrete combined T-beam middle beam comprises an upper T-shaped concrete beam and a lower double-web steel beam, the upper T-shaped concrete beam comprises a T-beam concrete top plate, top plate transverse connecting sections are arranged between two adjacent steel-concrete combined T-beam middle beams and between the steel-concrete combined T-beam middle beam and the steel-concrete combined T-beam boundary beam, the transverse connecting section of the top plate comprises a steel longitudinal beam, the surfaces of the T-beam concrete top plate connected with the steel longitudinal beam are provided with embedded I-shaped steel, the two end faces of the steel longitudinal beam are respectively connected with the adjacent embedded I-shaped steel, and two steel webs are arranged in the lower double-web steel beam.
2. The steel-concrete composite simply supported T-beam bridge as claimed in claim 1, wherein the top surface of the lower double-web steel beam is provided with steel beam-slab shear nails, and the upper T-shaped concrete beam and the lower double-web steel beam are connected by the steel beam-slab shear nails.
3. The steel-concrete composite simply-supported T-beam bridge according to claim 2, wherein the upper T-shaped concrete beam further comprises a T-beam concrete web, the T-beam concrete web is arranged on the bottom surface of the T-beam concrete top plate, a top plate longitudinal steel bar and a top plate stirrup are arranged in the T-beam concrete top plate, a web plate longitudinal steel bar and a web plate stirrup are arranged in the T-beam concrete web, the lower double-web steel beam comprises two steel beam webs, a steel beam bottom plate is arranged on the bottom surface of each steel beam web, a steel beam top plate is arranged on the top surface of each steel beam web, and the steel beam shear nails are uniformly distributed on the steel beam top plate.
4. The steel-concrete composite simple-supported T-beam bridge according to claim 1, wherein a ratio of a height of the upper T-shaped concrete beam to a height of the lower double web steel beam is 1/2-2/3.
5. The steel-concrete composite simply-supported T-beam bridge as claimed in claim 1, wherein the T-beam top plate embedded I-beam consists of an I-beam top plate, an I-beam bottom plate and an I-beam web, the steel longitudinal beam consists of a longitudinal beam top plate, a longitudinal beam bottom plate and a longitudinal beam web, a top plate hole is formed in the longitudinal beam top plate, a bottom plate hole is formed in the longitudinal beam bottom plate, and the steel longitudinal beam is connected with the embedded I-beam in a welding mode.
6. The steel-concrete composite simply-supported T-beam bridge according to claim 3, wherein a plurality of dry concrete diaphragms are arranged on two sides of the concrete web of the T-beam, diaphragm connecting sections are arranged between every two adjacent concrete diaphragms, the concrete diaphragms are longitudinally arranged at the end parts, 1/4 span positions and span positions of the bridge along the bridge, a plurality of steel beam vertical stiffening ribs are arranged on two sides of the steel beam web, and the arrangement distance of the steel beam vertical stiffening ribs along the longitudinal direction of the bridge is 2-3 m.
7. The steel-concrete composite simply supported T-beam bridge as claimed in claim 5, wherein evenly distributed longitudinal beam shear nails are arranged on the longitudinal beam top plate, and a bridge deck structure is arranged on the top surfaces of the transverse connecting sections of the T-beam concrete top plate and the top plate.
8. The steel-concrete composite simply supported T-beam bridge of claim 7, wherein the bridge deck structure comprises a bridge deck cast-in-place layer, and a bridge deck pavement is arranged on the top surface of the bridge deck cast-in-place layer.
9. The steel-concrete composite simple-supported T-beam bridge as claimed in claim 5, wherein the I-steel top plate and the longitudinal beam top plate are horizontally arranged, the I-steel top plate is welded with the longitudinal beam top plate, the I-steel bottom plate is welded with the longitudinal beam bottom plate, and the I-steel web plate is arranged inside the T-beam concrete top plate.
10. The steel-concrete composite simple-supported T-beam bridge as claimed in claim 1, wherein the bottom of the lower double-web steel beam is provided with an abutment support.
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| CN116219865A (en) * | 2023-05-08 | 2023-06-06 | 北京建工土木工程有限公司 | Assembled corrugated steel web-steel pipe composite beam and cantilever assembly construction method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116219865A (en) * | 2023-05-08 | 2023-06-06 | 北京建工土木工程有限公司 | Assembled corrugated steel web-steel pipe composite beam and cantilever assembly construction method thereof |
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