CN211645912U - Prefabricated prestressed concrete beam and steel-concrete composite beam splicing bridge - Google Patents
Prefabricated prestressed concrete beam and steel-concrete composite beam splicing bridge Download PDFInfo
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- CN211645912U CN211645912U CN201921998241.4U CN201921998241U CN211645912U CN 211645912 U CN211645912 U CN 211645912U CN 201921998241 U CN201921998241 U CN 201921998241U CN 211645912 U CN211645912 U CN 211645912U
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- 239000004567 concrete Substances 0.000 title claims abstract description 176
- 239000002131 composite material Substances 0.000 title claims abstract description 130
- 239000011513 prestressed concrete Substances 0.000 title claims abstract description 72
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 175
- 239000010959 steel Substances 0.000 claims abstract description 175
- 239000011178 precast concrete Substances 0.000 claims abstract description 108
- 238000005096 rolling process Methods 0.000 claims abstract description 41
- 238000004873 anchoring Methods 0.000 claims abstract description 33
- 230000002787 reinforcement Effects 0.000 claims abstract description 30
- 239000011150 reinforced concrete Substances 0.000 claims abstract description 27
- 230000000149 penetrating effect Effects 0.000 claims description 17
- 238000004519 manufacturing process Methods 0.000 abstract description 22
- 238000010276 construction Methods 0.000 abstract description 18
- 238000003466 welding Methods 0.000 description 12
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 8
- 238000004806 packaging method and process Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000005452 bending Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Abstract
A prefabricated prestressed concrete beam and steel-concrete composite beam splicing bridge is formed by directly connecting a prefabricated concrete box beam/T beam and a steel box beam/I-shaped steel section steel-concrete composite beam. The construction method comprises the following steps: manufacturing a precast concrete box beam/T beam in a precast yard near a construction site; manufacturing a steel box girder/I-shaped steel section steel-concrete composite girder in a factory; pre-tensioning prestressed reinforcements, butting the precast concrete box girder/T beam with the steel box girder/I-shaped steel section steel-concrete composite beam, inserting high-strength bolts into bolt holes and fixing the high-strength bolts by using nuts; the prestressed reinforcement penetrates through the prestressed reinforcement hole and is fixed by an anchorage device; the end steel plate and the anchoring steel plate of the reinforced concrete composite beam are encapsulated by post-cast concrete; for the form of the finish rolling bolt, the finish rolling bolt can penetrate into the bolt through hole when the two beams are butted, and is fixed by a nut and is packaged by concrete; for the form of the prestressed anchor cable, after the two beams are butted, the prestressed anchor cable penetrates into the two ends of the two beams to be fixed and is packaged by concrete.
Description
Technical Field
The utility model belongs to the technical field of bridge engineering, especially, relate to a prefabricated prestressed concrete roof beam and steel-concrete composite beam concatenation bridge.
Background
The precast concrete beam can be divided into a precast concrete box beam and a precast concrete T beam according to the difference of beam types, the precast concrete beam is a concrete beam which is manufactured in an independent field in advance, and the precast concrete T beam can be erected after the construction of the lower part of the bridge is completed by combining a bridge girder erection machine, so that the engineering progress can be effectively accelerated, and the construction period can be saved.
The precast concrete box girder can be divided into two types according to different materials, one type is a precast reinforced concrete box girder, the other type is a precast prestressed reinforced concrete box girder, the precast prestressed reinforced concrete box girder is formed by adding prestress on the basis of the precast reinforced concrete box girder, and the prestress is longitudinally arranged on part of the precast prestressed reinforced concrete box girder and sometimes needs to be added in the transverse direction. However, since the cross section of the load-bearing structure of the precast concrete box girder is a closed box section, the construction of the precast reinforced concrete box girder is relatively complicated, and the installation weight of the single-piece box girder is generally large, and the precast reinforced concrete box girder is still applied to bridges in many cases despite the high construction cost. The prefabricated reinforced concrete box girder mainly comprises a top plate, a bottom plate, a web plate and the like, wherein the top plate and the bottom plate are main working components of the bridge structure for bearing positive and negative bending moments, and the web plate is used for bearing cross-section shear stress and main tensile stress.
The precast concrete T-beam can be divided into a precast common concrete T-beam and a precast prestressed concrete T-beam, and the precast prestressed concrete T-beam can be divided into two types according to the difference of the prestressed forms, wherein one type is a bonded precast prestressed concrete T-beam, and the other type is an unbonded precast prestressed concrete T-beam. Generally speaking, the common span of the prefabricated common concrete T-beam is 7-20 m, and the common span of the prefabricated prestressed concrete T-beam is 20-50 m, wherein the widening of the horseshoe-shaped section is required for prestressing. Although the sectional shape of the precast concrete T-beam is not stable enough, so that temporary supporting and fixing are needed for transportation and placement, the precast common concrete T-beam and the precast prestressed concrete T-beam are still widely applied to bridges.
The steel-concrete composite beam is a composite beam which is formed by connecting a steel box beam and a concrete flange plate together through a shear connector and has coordinated stress and deformation, can fully utilize superior tensile property of steel and superior compression resistance of concrete, is a common structural form of a large-span bridge and promotes the application of the steel-concrete composite beam in a plurality of bridges. The section shapes of the steel-concrete composite beam are mainly divided into a steel box beam section shape and an I-steel section shape, and the composite beams with the two section shapes are common structural forms of a long-span bridge.
Although the precast concrete box girder/T girder and the steel box girder/I-shaped steel section steel-concrete composite girder are applied to a plurality of bridges, due to the structural and stress characteristics of the precast concrete box girder/T girder, the precast concrete box girder/T girder is limited in span in a plurality of practical projects, so that the application range of the precast concrete box girder/T girder is limited.
At present, bridges with the precast concrete box girders/T girders connected with steel box girders/I-steel section steel-concrete composite girders appear in many bridges, and the most common form is that the precast concrete box girders/T girders and the steel box girders/I-steel section steel-concrete composite girders are placed on the same pier stud or are respectively placed on two independent pier studs at the connection part, and the precast concrete box girders/T girders and the steel box girders/I-steel section steel-concrete composite girders are not in substantial contact and are only connected together by a bridge deck system.
The method still has certain limitation because in practical engineering, sometimes the same pier stud can not be used for simultaneously bearing the precast concrete box girder/T beam and the steel box girder/I-shaped steel section steel-concrete composite beam, or the condition that two pier studs are independently arranged does not exist. In this case, the conventional connection scheme cannot be implemented.
SUMMERY OF THE UTILITY MODEL
The problem that exists to prior art, the utility model provides a precast prestressed concrete roof beam and steel-concrete composite beam concatenation bridge bears the condition of precast concrete box beam/T roof beam and steel box beam/I-steel cross-section steel-concrete composite beam simultaneously to unable utilization same pier stud, perhaps does not possess when setting up the condition of two pier studs alone, need not the pier stud and just can satisfy the lug connection of precast concrete box beam/T roof beam and steel box beam/I-steel cross-section steel-concrete composite beam.
In order to achieve the above purpose, the utility model adopts the following technical scheme: a prefabricated prestressed concrete beam and steel-concrete composite beam splicing bridge comprises a prefabricated prestressed concrete beam and a steel-concrete composite beam, wherein the prefabricated prestressed concrete beam adopts a prefabricated concrete box beam or a prefabricated concrete T beam, and the steel-concrete composite beam adopts a steel-concrete composite beam with a steel box beam section or an I-shaped steel section; the prefabricated prestressed concrete beam and the steel-concrete composite beam adopt a direct connection structure; and an equal-height form or a non-equal-height form is adopted between the precast prestressed concrete beam and the steel-concrete composite beam.
The end part of the precast prestressed concrete beam is fixedly provided with an end part concrete block, a high-strength bolt is pre-embedded in the end part concrete block, prestressed steel bars are precast in the prestressed concrete beam, and corrugated pipes are precast outside the prestressed steel bars.
An end steel plate is fixedly arranged at the end part of the steel beam of the steel-concrete composite beam, an anchoring steel plate is arranged behind the end steel plate, and post-cast concrete is filled between the end steel plate and the anchoring steel plate; a shear connecting piece is fixedly arranged in a precast concrete slab of the steel-concrete composite beam and is welded at the top end of a steel beam of the steel-concrete composite beam; the high-strength bolt penetrates through a bolt hole in the end steel plate and is fixedly connected with the end steel plate; the prestressed reinforcement penetrates through the prestressed reinforcement holes in the end steel plate and the anchoring steel plate and is fixed on the anchoring steel plate.
The precast prestressed concrete beam and the precast concrete slab of the reinforced concrete composite beam are fixedly connected through a finish rolling bolt or a prestressed anchor cable.
When the precast prestressed concrete beam and the precast concrete slab of the reinforced concrete composite beam are fixedly connected through the finish rolling bolt, the finish rolling bolt is pre-embedded in the upper flange of the precast prestressed concrete beam, a finish rolling bolt penetrating hole is arranged in the precast concrete slab of the reinforced concrete composite beam, and a reserved concrete post-pouring groove is arranged on the precast concrete slab at the rear end of the finish rolling bolt penetrating hole.
When the precast prestressed concrete beam and the precast concrete slab of the steel-concrete composite beam are fixedly connected through the prestressed anchor cable, prestressed anchor cable penetrating holes are formed in the upper flange of the precast prestressed concrete beam and the precast concrete slab of the steel-concrete composite beam, and reserved anchoring grooves are formed in the upper flange of the precast prestressed concrete beam at two ends of each prestressed anchor cable penetrating hole and the precast concrete slab of the steel-concrete composite beam.
The construction method of the prefabricated prestressed concrete beam and steel-concrete composite beam splicing bridge comprises the following steps:
the method comprises the following steps: manufacturing a precast concrete box girder or a precast concrete T-shaped girder;
when the precast concrete box girder is manufactured, the steps are as follows:
firstly, selecting a prefabricated yard or a temporary yard near a construction site, and arranging a prefabricated pedestal in the prefabricated yard or the temporary yard;
secondly, manufacturing a template according to design requirements; simultaneously, binding steel bars on the prefabricated pedestal and forming a steel bar cage;
thirdly, installing and fixing the template;
fourthly, arranging prestressed reinforcements at the bottom of the box chamber of the precast concrete box girder according to design requirements; meanwhile, arranging finish rolling bolts in the upper flange of the precast concrete box girder, or arranging a pre-buried die or a corrugated pipe to form a pre-stressed anchor cable through hole;
fifthly, pouring concrete into the template until the concrete is cured and formed;
arranging high-strength bolts at the end parts of the precast concrete box girders;
seventhly, pouring concrete to the end part of the precast concrete box girder provided with the high-strength bolt until the concrete is solidified and formed, so that the high-strength bolt is fixed in a concrete block at the end part, and the precast concrete box girder is manufactured;
when the precast concrete T beam is manufactured, the steps are as follows:
firstly, selecting a prefabricated yard or a temporary yard near a construction site, and arranging a prefabricated pedestal in the prefabricated yard or the temporary yard;
secondly, manufacturing a template according to design requirements; simultaneously, binding steel bars on the prefabricated pedestal and forming a steel bar cage;
thirdly, installing and fixing the template;
fourthly, arranging prestressed reinforcements at the bottom of the web plate of the precast concrete T beam according to design requirements; meanwhile, arranging finish rolling bolts in the upper flange of the precast concrete T beam, or arranging a pre-buried die or a corrugated pipe to form a pre-stressed anchor cable through hole;
fifthly, pouring concrete into the template until the concrete is cured and formed;
arranging high-strength bolts at the end parts of the precast concrete T-shaped beams;
seventhly, pouring concrete to the end part of the precast concrete T beam with the high-strength bolt until the concrete is solidified and formed, so that the high-strength bolt is fixed in a concrete block at the end part, and the precast concrete T beam is manufactured;
step two: manufacturing a steel-concrete composite beam with a steel box beam section or an I-shaped steel-concrete composite beam with an I-shaped steel section;
when the steel-concrete composite beam with the steel box beam section is manufactured, the steps are as follows:
firstly, selecting a manufacturing factory of the steel-concrete composite beam with the section of the steel box beam;
secondly, welding a shear connecting piece on the top end of the steel beam of the steel-concrete composite beam with the section of the steel box beam;
arranging a pre-buried die or a corrugated pipe at the top end of the steel beam of the steel-concrete composite beam with the section of the steel box beam to form a finish rolling bolt penetrating hole or a prestressed anchor cable penetrating hole;
fourthly, pouring concrete on the top end of the steel beam until the concrete is solidified and formed to form a precast concrete plate, and manufacturing the precast concrete plate in a factory or on a construction site;
welding an end steel plate at the end part of the steel-concrete composite beam with the section of the steel box beam, and processing bolt holes and prestressed reinforcement holes on the end steel plate according to design requirements;
welding an anchoring steel plate behind the end steel plate according to design requirements, processing prestressed reinforcement holes on the anchoring steel plate according to the design requirements, and finishing the manufacturing of the steel-concrete composite beam with the section of the steel box beam;
when the I-steel section steel-concrete composite beam is manufactured, the steps are as follows:
firstly, selecting a manufacturing factory of the I-shaped steel section steel-concrete composite beam;
secondly, welding a shear connecting piece on the top end of the steel beam of the I-shaped steel section reinforced concrete composite beam;
arranging a pre-buried die or a corrugated pipe at the top end of the steel beam of the I-shaped steel section reinforced concrete composite beam to form a finish rolling bolt penetrating hole or a pre-stressed anchor cable penetrating hole;
fourthly, pouring concrete on the top end of the steel beam until the concrete is solidified and formed to form a precast concrete plate, and manufacturing the precast concrete plate in a factory or on a construction site;
welding an end steel plate at the end part of the I-shaped steel section reinforced concrete composite beam, and processing bolt holes and prestressed reinforcement holes on the end steel plate according to design requirements;
welding an anchoring steel plate behind the end steel plate according to design requirements, processing prestressed reinforcement holes on the anchoring steel plate according to the design requirements, and finishing manufacturing the I-shaped steel section steel-concrete composite beam;
step three: pre-tensioning prestressed reinforcements, butting the prefabricated prestressed concrete beam with the steel-concrete composite beam, inserting high-strength bolts into bolt holes of end steel plates, and fixing the high-strength bolts and the end steel plates together by using nuts; simultaneously, sequentially penetrating the tensioned prestressed steel bars through the prestressed steel bar holes of the end steel plate and the anchoring steel plate, and fixedly connecting the prestressed steel bars and the anchoring steel plate together by using an anchorage device;
step four: filling and packaging the space between the end steel plate and the anchoring steel plate by post-cast concrete;
step five: when finish rolling bolts are arranged in the upper flange of the precast concrete box girder or the precast concrete T girder, and finish rolling bolt through holes are preset in a precast concrete slab of the steel box girder section steel-concrete composite girder or the I-steel section steel-concrete composite girder, the finish rolling bolts synchronously penetrate into the finish rolling bolt through holes when the precast prestressed concrete girder and the steel-concrete composite girder are butted, and at the moment, the finish rolling bolts are fixed into a reserved concrete post-pouring groove through nuts; when pre-stressed anchor cable penetrating holes are pre-formed in the upper flange of the precast concrete box girder or the precast concrete T girder and in the precast concrete slab of the steel box girder section steel-concrete composite girder or the I-steel section steel-concrete composite girder, after the pre-stressed concrete girder and the steel-concrete composite girder are butted, the pre-stressed anchor cable penetrates into the pre-stressed anchor cable penetrating holes, and the pre-stressed anchor cable is fixed into the pre-reserved anchor groove through an anchorage device; and finally pouring concrete into the reserved concrete post-pouring groove or the reserved anchoring groove to finish packaging, and finishing the construction of the prefabricated prestressed concrete beam and steel-concrete composite beam spliced bridge.
The utility model has the advantages that:
the utility model discloses a precast prestressed concrete roof beam and steel-concrete composite beam concatenation bridge, to unable utilization same pier stud come to bear the condition of precast concrete box beam/T roof beam and steel box beam/I-steel cross-section steel-concrete composite beam simultaneously, perhaps when not possessing the condition that sets up two pier studs alone, need not the pier stud and just can satisfy the lug connection of precast concrete box beam/T roof beam and steel box beam/I-steel cross-section steel-concrete composite beam.
Drawings
Fig. 1 is a schematic structural view of a splicing bridge (contour form + finish rolling bolt) of a precast prestressed concrete beam and a steel-concrete composite beam according to the present invention;
fig. 2 is a schematic structural view of a splicing bridge (equal height form + prestressed anchor cable) of a precast prestressed concrete beam and a steel-concrete composite beam according to the present invention;
fig. 3 is a schematic structural view of a splicing bridge (non-equal height form + finish rolling bolt) of a precast prestressed concrete beam and a steel-concrete composite beam according to the present invention;
fig. 4 is a schematic structural view of a splicing bridge (non-equal height form + prestressed anchor cable) of a precast prestressed concrete beam and a steel-concrete composite beam according to the present invention;
FIG. 5 is a sectional view taken along line A-A of FIG. 1 (I-beam section steel-concrete composite beam);
FIG. 6 is a sectional view taken along line A-A in FIG. 1 (steel box girder section steel-concrete composite girder);
FIG. 7 is a sectional view taken along line B-B of FIG. 2 (I-beam section steel-concrete composite beam);
FIG. 8 is a sectional view taken along line B-B in FIG. 2 (steel box girder section steel-concrete composite girder);
fig. 9 is a schematic structural view of a precast prestressed concrete beam (finish rolling bolt) according to the present invention;
FIG. 10 is a cross-sectional view taken along line D-D in FIG. 9 (precast concrete box girder);
FIG. 11 is a cross-sectional view taken along line D-D of FIG. 9 (precast concrete T-beam);
FIG. 12 is a cross-sectional view taken along line E-E of FIG. 9 (precast concrete box girder);
FIG. 13 is a cross-sectional view taken along line E-E of FIG. 9 (precast concrete T-beam);
fig. 14 is a schematic structural view of a precast prestressed concrete girder (prestressed anchor cable) according to the present invention;
FIG. 15 is a sectional view taken along line F-F in FIG. 14 (precast concrete box girder);
FIG. 16 is a sectional view taken along line F-F in FIG. 14 (precast concrete T-beam);
fig. 17 is a schematic structural view of the steel-concrete composite beam (finish rolling bolt) of the present invention;
FIG. 18 is a sectional view taken along line J-J in FIG. 17 (precast concrete box girder);
FIG. 19 is a sectional view taken along line J-J of FIG. 17 (precast concrete T-beam);
FIG. 20 is a sectional view taken along line K-K in FIG. 17 (precast concrete box girder);
FIG. 21 is a cross-sectional view taken along line K-K of FIG. 17 (precast concrete T-beam);
fig. 22 is a schematic structural view of a steel-concrete composite beam (prestressed anchor cable) according to the present invention;
FIG. 23 is a sectional view taken along line L-L in FIG. 22 (precast concrete box girder);
FIG. 24 is a sectional view taken along line L-L of FIG. 22 (precast concrete T-beam);
in the figure, 1-precast concrete slab, 2-steel beam, 3-shear connector, 4-finish rolling bolt, 5-precast prestressed concrete beam, 6-prestressed reinforcement, 7-high strength bolt, 8-end steel plate, 9-anchoring steel plate, 10-post-cast concrete, 11-end concrete block, 12-finish rolling bolt through hole, 13-prestressed anchor cable, 14-concrete reserved post-cast groove, 15-prestressed anchor cable through hole, 16-bolt hole, 17-prestressed reinforcement hole and 19-reserved anchoring groove.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1 to 24, a prefabricated prestressed concrete beam and steel-concrete composite beam splicing bridge comprises a prefabricated prestressed concrete beam 5 and a steel-concrete composite beam, wherein the prefabricated prestressed concrete beam adopts a prefabricated concrete box beam or a prefabricated concrete T beam, and the steel-concrete composite beam adopts a steel-concrete composite beam with a steel box beam section or an i-shaped steel-concrete composite beam with a steel box beam section; the precast prestressed concrete beam 5 and the steel-concrete composite beam adopt a direct connection structure; and an equal-height form or a non-equal-height form is adopted between the precast prestressed concrete beam 5 and the steel-concrete composite beam.
The end part of the precast prestressed concrete beam 5 is fixedly provided with an end part concrete block 11, a high-strength bolt 7 is pre-embedded in the end part concrete block 11, a prestressed reinforcement 6 is pre-cast in the prestressed concrete beam 1, and a corrugated pipe is pre-cast outside the prestressed reinforcement 6.
An end steel plate 8 is fixedly arranged at the end part of the steel beam 2 of the steel-concrete composite beam, an anchoring steel plate 9 is arranged behind the end steel plate 8, and post-cast concrete 10 is filled between the end steel plate 8 and the anchoring steel plate 9; a shear connecting piece 3 is fixedly arranged in a precast concrete slab 1 of the steel-concrete composite beam, and the shear connecting piece 3 is welded at the top end of a steel beam 2 of the steel-concrete composite beam; the high-strength bolt 7 penetrates through a bolt hole 16 in the end steel plate 8 and is fixedly connected with the end steel plate 8; the prestressed reinforcement 6 passes through the prestressed reinforcement holes 17 on the end steel plate 8 and the anchoring steel plate 9 and is fixed on the anchoring steel plate 9.
The precast prestressed concrete beam 5 is fixedly connected with the precast concrete plate 1 of the reinforced concrete composite beam through a finish rolling bolt 4 or a prestressed anchor cable 13.
When the precast prestressed concrete beam 5 is fixedly connected with the precast concrete slab 1 of the reinforced concrete composite beam through the finish rolling bolt 4, the finish rolling bolt 4 is pre-embedded in the upper flange of the precast prestressed concrete beam 5, a finish rolling bolt through hole 12 is arranged in the precast concrete slab 1 of the reinforced concrete composite beam, and a reserved concrete post-pouring groove 14 is arranged on the precast concrete slab 1 at the rear end of the finish rolling bolt through hole 12.
When the precast prestressed concrete beam 5 and the precast concrete slab 1 of the steel-concrete composite beam are fixedly connected through the prestressed anchor cable 13, the prestressed anchor cable mounting holes 15 are respectively formed in the upper flange of the precast prestressed concrete beam 5 and the precast concrete slab 1 of the steel-concrete composite beam, and the upper flange of the precast prestressed concrete beam 5 at two ends of each prestressed anchor cable mounting hole 15 and the precast concrete slab 1 of the steel-concrete composite beam are respectively provided with a reserved anchor groove 19.
The construction method of the prefabricated prestressed concrete beam and steel-concrete composite beam splicing bridge comprises the following steps:
the method comprises the following steps: manufacturing a precast concrete box girder or a precast concrete T-shaped girder;
when the precast concrete box girder is manufactured, the steps are as follows:
firstly, selecting a prefabricated yard or a temporary yard near a construction site, and arranging a prefabricated pedestal in the prefabricated yard or the temporary yard;
secondly, manufacturing a template according to design requirements; simultaneously, binding steel bars on the prefabricated pedestal and forming a steel bar cage;
thirdly, installing and fixing the template;
fourthly, arranging prestressed reinforcements 6 at the bottom of the box chamber of the precast concrete box girder according to design requirements; meanwhile, arranging finish rolling bolts 4 in the upper flange of the precast concrete box girder, or arranging a pre-buried die or a corrugated pipe to form a pre-stressed anchor cable through hole 15;
fifthly, pouring concrete into the template until the concrete is cured and formed;
sixthly, arranging a high-strength bolt 7 at the end part of the precast concrete box girder;
seventhly, pouring concrete to the end part of the precast concrete box girder provided with the high-strength bolt 7 until the concrete is solidified and formed, so that the high-strength bolt 7 is fixed in the end part concrete block 11, and the precast concrete box girder is manufactured;
when the precast concrete T beam is manufactured, the steps are as follows:
firstly, selecting a prefabricated yard or a temporary yard near a construction site, and arranging a prefabricated pedestal in the prefabricated yard or the temporary yard;
secondly, manufacturing a template according to design requirements; simultaneously, binding steel bars on the prefabricated pedestal and forming a steel bar cage;
thirdly, installing and fixing the template;
fourthly, arranging prestressed reinforcements 6 at the bottom of the web plate of the precast concrete T beam according to design requirements; meanwhile, arranging finish rolling bolts 4 in the upper flange of the precast concrete T beam, or arranging a pre-buried die or a corrugated pipe to form a pre-stressed anchor cable through hole 15;
fifthly, pouring concrete into the template until the concrete is cured and formed;
arranging a high-strength bolt 7 at the end part of the precast concrete T beam;
seventhly, pouring concrete to the end part of the precast concrete T beam with the high-strength bolt 7 until the concrete is solidified and molded, so that the high-strength bolt 7 is fixed in the end part concrete block 11, and the precast concrete T beam is manufactured;
step two: manufacturing a steel-concrete composite beam with a steel box beam section or an I-shaped steel-concrete composite beam with an I-shaped steel section;
when the steel-concrete composite beam with the steel box beam section is manufactured, the steps are as follows:
firstly, selecting a manufacturing factory of the steel-concrete composite beam with the section of the steel box beam;
secondly, welding a shear connecting piece 3 on the top end of the steel beam 2 of the steel-concrete composite beam with the section of the steel box beam;
thirdly, arranging a pre-buried die or a corrugated pipe at the top end of the steel beam 2 of the steel box girder section reinforced concrete composite girder to form a finish rolling bolt mounting hole 12 or a prestressed anchor cable mounting hole 15;
fourthly, pouring concrete on the top end of the steel beam 2 until the concrete is solidified and formed to form a precast concrete plate 1, and manufacturing the precast concrete plate 1 in a factory or on a construction site;
welding an end steel plate 8 at the end part of the steel-concrete composite beam with the section of the steel box beam, and processing bolt holes 16 and prestressed reinforcement holes 17 on the end steel plate 8 according to design requirements;
welding an anchoring steel plate 9 behind the end steel plate 8 according to design requirements, processing a prestressed reinforcement hole 17 on the anchoring steel plate 9 according to the design requirements, and finishing the manufacturing of the steel-concrete composite beam with the section of the steel box beam;
when the I-steel section steel-concrete composite beam is manufactured, the steps are as follows:
firstly, selecting a manufacturing factory of the I-shaped steel section steel-concrete composite beam;
secondly, welding a shear connector 3 on the top end of the steel beam 2 of the I-shaped steel section reinforced concrete composite beam;
thirdly, arranging a pre-buried die or a corrugated pipe at the top end of the steel beam 2 of the I-shaped steel section reinforced concrete composite beam to form a finish rolling bolt through hole 12 or a prestressed anchor cable through hole 15;
fourthly, pouring concrete on the top end of the steel beam 2 until the concrete is solidified and formed to form a precast concrete plate 1, and manufacturing the precast concrete plate 1 in a factory or on a construction site;
welding an end steel plate 8 at the end part of the I-shaped steel section reinforced concrete composite beam, and processing bolt holes 16 and prestressed reinforcement holes 17 on the end steel plate 8 according to design requirements;
welding an anchoring steel plate 9 behind the end steel plate 8 according to design requirements, processing a prestressed reinforcement hole 17 on the anchoring steel plate 9 according to the design requirements, and finishing manufacturing the I-shaped steel section steel-concrete composite beam;
step three: pre-tensioning prestressed reinforcement 6, butting the prefabricated prestressed concrete beam 5 with a steel-concrete composite beam, inserting a high-strength bolt 7 into a bolt hole 16 of an end steel plate 8, and fixing the high-strength bolt 7 and the end steel plate 8 together by using a nut; meanwhile, the tensioned prestressed reinforcement 6 sequentially passes through the end steel plate 8 and the prestressed reinforcement hole 17 of the anchoring steel plate 9, and the prestressed reinforcement 6 and the anchoring steel plate 9 are fixedly connected together by using an anchorage device;
step four: filling and packaging the space between the end steel plate 8 and the anchoring steel plate 9 by post-cast concrete 10;
step five: when the finish rolling bolt 4 is arranged in the upper flange of the precast concrete box girder or the precast concrete T girder, and the finish rolling bolt through hole 12 is preset in the precast concrete slab 1 of the steel box girder section reinforced concrete composite girder or the I-shaped steel section reinforced concrete composite girder, the finish rolling bolt 4 can synchronously penetrate into the finish rolling bolt through hole 12 when the precast prestressed concrete girder 5 is butted with the steel concrete composite girder, and the finish rolling bolt 4 is fixed into the reserved concrete post-pouring groove 14 through a nut; when the prestressed anchor cable penetrating holes 15 are prefabricated in the upper flange of the precast concrete box girder or the precast concrete T girder and in the precast concrete slab 1 of the steel box girder section steel-concrete composite girder or the I-steel section steel-concrete composite girder, after the precast prestressed concrete girder 5 is butted with the steel-concrete composite girder, the prestressed anchor cable 13 is penetrated into the prestressed anchor cable penetrating holes 15, and the prestressed anchor cable 13 is fixed into the reserved anchor groove 19 through an anchor; and finally pouring concrete into the reserved concrete post-pouring groove 14 or the reserved anchoring groove 19 to finish packaging, and finishing the construction of the prefabricated prestressed concrete beam and steel-concrete composite beam spliced bridge.
The embodiments are not intended to limit the scope of the present invention, and all equivalent implementations or modifications that do not depart from the scope of the present invention are intended to be included within the scope of the present invention.
Claims (6)
1. The utility model provides a prefabricated prestressed concrete roof beam and steel-concrete composite beam concatenation bridge which characterized in that: the prefabricated prestressed concrete beam is a prefabricated concrete box beam or a prefabricated concrete T beam, and the steel-concrete composite beam is a steel-concrete composite beam with a steel box beam section or an I-shaped steel section; the prefabricated prestressed concrete beam and the steel-concrete composite beam adopt a direct connection structure; and an equal-height form or a non-equal-height form is adopted between the precast prestressed concrete beam and the steel-concrete composite beam.
2. The precast prestressed concrete girder and steel-concrete composite girder splicing bridge according to claim 1, wherein: the end part of the precast prestressed concrete beam is fixedly provided with an end part concrete block, a high-strength bolt is pre-embedded in the end part concrete block, prestressed steel bars are precast in the prestressed concrete beam, and corrugated pipes are precast outside the prestressed steel bars.
3. The precast prestressed concrete girder and steel-concrete composite girder splicing bridge according to claim 2, wherein: an end steel plate is fixedly arranged at the end part of the steel beam of the steel-concrete composite beam, an anchoring steel plate is arranged behind the end steel plate, and post-cast concrete is filled between the end steel plate and the anchoring steel plate; a shear connecting piece is fixedly arranged in a precast concrete slab of the steel-concrete composite beam and is welded at the top end of a steel beam of the steel-concrete composite beam; the high-strength bolt penetrates through a bolt hole in the end steel plate and is fixedly connected with the end steel plate; the prestressed reinforcement penetrates through the prestressed reinforcement holes in the end steel plate and the anchoring steel plate and is fixed on the anchoring steel plate.
4. The precast prestressed concrete girder and steel-concrete composite girder splicing bridge according to claim 1, wherein: the precast prestressed concrete beam and the precast concrete slab of the reinforced concrete composite beam are fixedly connected through a finish rolling bolt or a prestressed anchor cable.
5. The precast prestressed concrete girder and steel-concrete composite girder splicing bridge according to claim 4, wherein: when the precast prestressed concrete beam and the precast concrete slab of the reinforced concrete composite beam are fixedly connected through the finish rolling bolt, the finish rolling bolt is pre-embedded in the upper flange of the precast prestressed concrete beam, a finish rolling bolt penetrating hole is arranged in the precast concrete slab of the reinforced concrete composite beam, and a reserved concrete post-pouring groove is arranged on the precast concrete slab at the rear end of the finish rolling bolt penetrating hole.
6. The precast prestressed concrete girder and steel-concrete composite girder splicing bridge according to claim 4, wherein: when the precast prestressed concrete beam and the precast concrete slab of the steel-concrete composite beam are fixedly connected through the prestressed anchor cable, prestressed anchor cable penetrating holes are formed in the upper flange of the precast prestressed concrete beam and the precast concrete slab of the steel-concrete composite beam, and reserved anchoring grooves are formed in the upper flange of the precast prestressed concrete beam at two ends of each prestressed anchor cable penetrating hole and the precast concrete slab of the steel-concrete composite beam.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921998241.4U CN211645912U (en) | 2019-11-19 | 2019-11-19 | Prefabricated prestressed concrete beam and steel-concrete composite beam splicing bridge |
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|---|---|---|---|
| CN201921998241.4U CN211645912U (en) | 2019-11-19 | 2019-11-19 | Prefabricated prestressed concrete beam and steel-concrete composite beam splicing bridge |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110878513A (en) * | 2019-11-19 | 2020-03-13 | 辽宁省城乡市政工程集团有限责任公司 | A kind of prefabricated prestressed concrete beam and steel-concrete composite beam splicing bridge and construction method |
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2019
- 2019-11-19 CN CN201921998241.4U patent/CN211645912U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110878513A (en) * | 2019-11-19 | 2020-03-13 | 辽宁省城乡市政工程集团有限责任公司 | A kind of prefabricated prestressed concrete beam and steel-concrete composite beam splicing bridge and construction method |
| CN110878513B (en) * | 2019-11-19 | 2025-03-07 | 辽宁省城乡市政工程集团有限责任公司 | Prefabricated prestressed concrete beam and steel-concrete composite beam spliced bridge and construction method |
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