CN110878513B - Prefabricated prestressed concrete beam and steel-concrete composite beam spliced bridge and construction method - Google Patents
Prefabricated prestressed concrete beam and steel-concrete composite beam spliced bridge and construction method Download PDFInfo
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- CN110878513B CN110878513B CN201911132483.XA CN201911132483A CN110878513B CN 110878513 B CN110878513 B CN 110878513B CN 201911132483 A CN201911132483 A CN 201911132483A CN 110878513 B CN110878513 B CN 110878513B
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D1/00—Bridges in general
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2/00—Bridges characterised by the cross-section of their bearing spanning structure
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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Abstract
一种预制预应力混凝土梁与钢混组合梁拼接桥及施工方法，拼接桥由预制混凝土箱梁/T梁与钢箱梁/工字钢截面钢混组合梁直接连接构成。施工方法为：在施工场地附近预制场内制作预制混凝土箱梁/T梁；在工厂制作钢箱梁/工字钢截面钢混组合梁；预先张拉预应力钢筋，将预制混凝土箱梁/T梁与钢箱梁/工字钢截面钢混组合梁对接，使高强螺栓插入螺栓孔并利用螺母固定；预应力钢筋穿过预应力钢筋孔并利用锚具固定；在钢混组合梁的端部钢板与锚固钢板之间利用后浇混凝土封装；对于采用精轧螺栓的形式，两梁对接时精轧螺栓会穿入螺栓穿装孔内，利用螺母固定并由混凝土封装；对于采用预应力锚索的形式，两梁对接后，将预应力锚索穿入后两端固定并由混凝土封装。
A prefabricated prestressed concrete beam and steel-concrete composite beam spliced bridge and construction method, the spliced bridge is composed of a prefabricated concrete box beam/T beam and a steel box beam/I-beam steel-concrete composite beam directly connected. The construction method is: make a prefabricated concrete box beam/T beam in a prefabrication yard near the construction site; make a steel box beam/I-beam steel-concrete composite beam in a factory; pre-tension the prestressed steel bars, butt the prefabricated concrete box beam/T beam with the steel box beam/I-beam steel-concrete composite beam, insert the high-strength bolts into the bolt holes and fix them with nuts; the prestressed steel bars pass through the prestressed steel bar holes and are fixed with anchors; the end steel plates and anchoring steel plates of the steel-concrete composite beam are encapsulated with post-cast concrete; in the form of using precision-rolled bolts, when the two beams are butt-jointed, the precision-rolled bolts will penetrate into the bolt holes, be fixed with nuts and be encapsulated with concrete; in the form of using prestressed anchor cables, after the two beams are butt-jointed, the prestressed anchor cables are inserted and fixed at both ends and encapsulated with concrete.
Description
Technical Field
The invention belongs to the technical field of bridge engineering, and particularly relates to a prefabricated prestressed concrete beam and reinforced concrete composite beam spliced bridge and a construction method.
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 the beams, and the precast concrete beam is the concrete beam which is prefabricated in an independent site, can be erected after the engineering of the lower part of the bridge is completed by combining a bridge girder erection machine, and can effectively accelerate the engineering progress and save the construction period.
The precast concrete box girder can be divided into two types according to different materials, one is the precast reinforced concrete box girder, the other is the precast prestressed reinforced concrete box girder, the precast prestressed reinforced concrete box girder is added with prestressing force on the basis of the precast reinforced concrete box girder, and part of the precast prestressed reinforced concrete box girder is longitudinally provided with prestressing force and is also required to be added with prestressing force at times in the transverse direction. However, the cross section of the bearing structure of the precast concrete box girder is a closed box section, so that the construction of the precast reinforced concrete box girder is relatively complex, the installation weight of the single box girder is usually large, and the precast reinforced concrete box girder is still more applied in bridges in spite of 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 for bearing positive and negative bending moments of the bridge structure, and the web plate is used for bearing section shear stress and main tensile stress.
The precast concrete T-beam may be divided into a precast general concrete T-beam and a precast prestressed concrete T-beam, and the precast prestressed concrete T-beam may be divided into two types according to the difference of the prestressing forms, one being a bonded precast prestressed concrete T-beam and the other being an unbonded precast prestressed concrete T-beam. Generally, 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 horseshoe-shaped cross section widening is designed for the requirement of prestressing. Although the cross-sectional shape of the precast concrete T-beam is not stable enough, so that temporary support and fixation are required for transportation and placement, the precast ordinary concrete T-beam and the precast prestressed concrete T-beam are still widely used in bridges.
The steel-concrete composite beam is a composite beam which is formed by connecting a steel box beam and a concrete flange plate through a shear connector and has coordinated stress and deformation, and can fully utilize the excellent tensile property of steel and the excellent compressive property of concrete. The sectional shape of the steel-concrete composite beam is mainly divided into the sectional shape of a steel box beam and the sectional shape of I-steel, and the composite beam with the two sectional shapes is a common structural form of a large-span bridge.
Although the precast concrete box girder/T beam and the steel box girder/I-steel section steel-concrete composite girder are applied to various bridges, the precast concrete box girder/T beam is limited in span in many practical projects due to the structure and stress characteristics of the precast concrete box girder/T beam, so that the application range of the precast concrete box girder/T beam is limited, the steel box girder/I-steel section steel-concrete composite girder can be used for replacing or partially replacing the precast concrete box girder/T beam in order to solve the practical problem, and the high cost of the steel girder is considered, and only the precast concrete box girder/T beam of Liang Laiti generations is utilized in special required places.
Currently, in many bridges, a bridge is formed by connecting a precast concrete box girder/T-shaped girder and a steel box girder/I-shaped steel section reinforced concrete composite girder, the most common form is that the precast concrete box girder/T-shaped girder and the steel box girder/I-shaped steel section reinforced concrete composite girder are placed on the same pier column at a connecting position or respectively placed on two independent pier columns, and no substantial contact exists between the precast concrete box girder/T-shaped girder and the steel box girder/I-shaped steel section reinforced concrete composite girder, but only bridge decks are connected together.
The above method still has a certain limitation because in actual engineering, the condition that the same pier column cannot be used for bearing the precast concrete box girder/T beam and the steel box girder/I-steel section steel-concrete composite girder at the same time sometimes occurs, or the condition that two pier columns are arranged independently does not exist. In this case, the conventional connection scheme cannot be implemented.
Disclosure of Invention
Aiming at the problems existing in the prior art, the invention provides a splicing bridge of a precast prestressed concrete beam and a reinforced concrete composite beam and a construction method, and can meet the direct connection of the precast concrete box beam/T beam and the reinforced concrete composite beam with the steel box beam/I-steel section without any pier when the same pier cannot be used for bearing the precast concrete box beam/T beam and the reinforced concrete composite beam with the steel box beam/I-steel section at the same time or the condition that two pier are independently arranged is not provided.
The technical scheme is that the spliced bridge of the precast prestressed concrete beam and the reinforced concrete composite beam comprises the precast prestressed concrete beam and the reinforced concrete composite beam, wherein the precast prestressed concrete beam adopts a precast concrete box beam or a precast concrete T-shaped beam, the reinforced concrete composite beam adopts a reinforced concrete composite beam with a steel box beam section or a reinforced concrete composite beam with an I-shaped steel section, a direct connection structure is adopted between the precast prestressed concrete beam and the reinforced concrete composite beam, and an equal-height form or an unequal-height form is adopted between the precast prestressed concrete beam and the reinforced 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-buried in the end part concrete block, a prestressed reinforcement is precast in the prestressed concrete beam, and a corrugated pipe is precast outside the prestressed reinforcement.
The steel beam end of the steel-concrete composite beam is fixedly provided with an end steel plate, an anchor steel plate is arranged behind the end steel plate, a post-cast concrete is filled between the end steel plate and the anchor steel plate, a shear connector is fixedly arranged in a precast concrete slab of the steel-concrete composite beam and welded at the top end of the 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, and the prestressed steel bar penetrates through prestressed steel bar holes in the end steel plate and the anchor steel plate and is fixed on the anchor steel plate.
The precast prestressed concrete beam is fixedly connected with the precast concrete slab of the steel-concrete composite beam through finish rolling bolts or prestressed anchor cables.
When the precast prestressed concrete beam and the precast concrete slab of the reinforced concrete composite beam are fixedly connected through finish rolling bolts, the finish rolling bolts are pre-buried in the upper flange of the precast prestressed concrete beam, finish rolling bolt penetrating holes are formed in the precast concrete slab of the reinforced concrete composite beam, and a reserved concrete post-pouring groove is formed in the precast concrete slab at the rear end of each finish rolling bolt penetrating hole.
When the precast prestressed concrete beam is fixedly connected with the precast concrete slab of the reinforced concrete composite beam through the prestressed anchor cable, the prestressed anchor cable penetrating holes are formed in the upper flange of the precast prestressed concrete beam and the precast concrete slab of the reinforced concrete composite beam, and the reserved anchor grooves are formed in the upper flange of the precast prestressed concrete beam at the two ends of the prestressed anchor cable penetrating holes and the precast concrete slab of the reinforced concrete composite beam.
The construction method of the precast prestressed concrete beam and reinforced concrete composite beam spliced bridge comprises the following steps:
Step one, manufacturing a precast concrete box beam or a precast concrete T beam;
When the precast concrete box girder is manufactured, the steps are as follows:
① . Selecting a prefabricated field or a temporary storage yard near a construction site, and arranging a prefabricated pedestal in the prefabricated field or the temporary storage yard;
② . Simultaneously binding reinforcing steel bars on the prefabricated pedestal and forming a reinforcing steel bar cage;
③ . Installing and fixing the template;
④ . Simultaneously, arranging finish rolling bolts or arranging pre-buried dies or corrugated pipes for forming pre-stressed anchor cable penetrating holes in the upper flange of the precast concrete box girder;
⑤ . Pouring concrete into the template until the concrete is solidified and formed;
⑥ . Arranging high-strength bolts at the end parts of the precast concrete box girders;
⑦ . Pouring concrete to the end part of the precast concrete box girder provided with the high-strength bolts until the concrete is solidified and molded, so that the high-strength bolts are fixed in the end part concrete blocks, and the precast concrete box girder is manufactured;
when manufacturing the precast concrete T beam, the steps are as follows:
① . Selecting a prefabricated field or a temporary storage yard near a construction site, and arranging a prefabricated pedestal in the prefabricated field or the temporary storage yard;
② . Simultaneously binding reinforcing steel bars on the prefabricated pedestal and forming a reinforcing steel bar cage;
③ . Installing and fixing the template;
④ . Simultaneously, arranging finish rolling bolts or arranging pre-buried dies or corrugated pipes for forming pre-stressed anchor cable penetrating holes in the upper flange of the precast concrete T beam;
⑤ . Pouring concrete into the template until the concrete is solidified and formed;
⑥ . Arranging high-strength bolts at the end parts of the precast concrete T beams;
⑦ . Pouring concrete to the end part of the precast concrete T beam provided with the high-strength bolts until the concrete is solidified and molded, so that the high-strength bolts are fixed in the end part concrete blocks, and the precast concrete T beam is manufactured;
step two, manufacturing a steel-concrete composite beam with a steel box girder section or a steel-concrete composite beam with an I-steel section;
when manufacturing the steel-concrete composite beam with the steel box girder section, the steps are as follows:
① . Selecting a manufacturing factory of the steel-concrete composite beam with the steel box girder section;
② . Steel-concrete composite beam with steel box beam section the top end of the steel beam is welded with a shear connector;
③ . Arranging a pre-buried die or a corrugated pipe at the top end of a steel beam of the steel-concrete composite beam with the steel box girder section to form a finish rolling bolt penetrating hole or a pre-stress anchor cable penetrating hole;
④ . Pouring concrete on the top end of the steel beam until the concrete is solidified and formed, and forming a precast concrete slab, wherein the precast concrete slab is manufactured in a factory or a construction site;
⑤ . Welding an end steel plate at the end of the steel-concrete composite beam with the steel box girder section, wherein bolt holes and prestressed reinforcement holes are formed in the end steel plate according to design requirements;
⑥ . Welding an anchoring steel plate at the rear of the end steel plate according to the design requirement, and processing a prestressed reinforcement hole on the anchoring steel plate according to the design requirement, wherein the manufacturing of the steel-concrete composite beam with the section of the steel box girder is completed;
When manufacturing the I-steel section steel-concrete composite beam, the steps are as follows:
① . Selecting a manufacturing factory of the I-steel section steel-concrete composite beam;
② . Welding a shear connector on the top end of a steel beam of the I-steel section reinforced concrete composite beam;
③ . Arranging a pre-buried die or a corrugated pipe at the top end of a steel beam of the I-steel section reinforced concrete composite beam to form a finish rolling bolt penetrating hole or a pre-stress anchor cable penetrating hole;
④ . Pouring concrete on the top end of the steel beam until the concrete is solidified and formed, and forming a precast concrete slab, wherein the precast concrete slab is manufactured in a factory or a construction site;
⑤ . Welding an end steel plate at the end of the I-steel section reinforced concrete composite beam, wherein bolt holes and prestressed reinforcement holes are formed in the end steel plate according to design requirements;
⑥ . Welding an anchoring steel plate at the rear of the end steel plate according to the design requirement, and processing a prestressed reinforcement hole on the anchoring steel plate according to the design requirement, wherein the manufacturing of the I-steel section reinforced concrete composite beam is completed;
Pre-tensioning the prestressed reinforcement, then butting the precast prestressed concrete beam with the reinforced concrete composite beam, inserting a high-strength bolt into a bolt hole of an end steel plate, and fixing the high-strength bolt with the end steel plate by using a nut;
filling and packaging the space between the end steel plate and the anchoring steel plate by post-pouring concrete;
When the precast concrete box girder or the upper flange of the precast concrete T girder, and the precast concrete slab of the steel-concrete composite girder or the I-steel section steel-concrete composite girder are internally provided with finish rolling bolt penetrating holes in advance, the finish rolling bolts synchronously penetrate into the finish rolling bolt penetrating holes when the precast prestressed concrete girder is in butt joint with the steel-concrete composite girder, the finish rolling bolts are fixed into the reserved concrete post-pouring groove through nuts at the moment, when the precast concrete box girder or the upper flange of the precast concrete T girder, the precast concrete slab of the steel-concrete composite girder or the I-steel section steel-concrete composite girder are internally provided with the prestressed anchor rope penetrating holes in advance, after the precast prestressed concrete girder and the steel-concrete composite girder are in butt joint, the prestressed anchor rope is penetrated into the prestressed anchor rope penetrating holes, and is fixed into the reserved anchor groove through an anchor tool, and finally, the precast concrete is poured into the reserved concrete post-pouring groove or the reserved anchor groove to finish packaging, and the construction of the precast prestressed concrete girder and the steel-concrete composite girder splicing bridge is finished.
The invention has the beneficial effects that:
According to the splicing bridge and the construction method for the precast prestressed concrete beam and the reinforced concrete composite beam, the condition that the precast concrete box beam/T beam and the reinforced concrete composite beam with the steel box beam/I-steel section cannot be simultaneously born by the same pier column, or the condition that two pier columns are arranged independently is not provided, and the condition that the precast concrete box beam/T beam and the reinforced concrete composite beam with the steel box beam/I-steel section are directly connected can be met without the pier column.
Drawings
Fig. 1 is a schematic structural view of a splicing bridge (equal height form+finish rolling bolt) of a precast prestressed concrete beam and reinforced concrete composite beam according to the present invention;
fig. 2 is a schematic structural view of a spliced bridge (equal-height form+pre-stressed anchor cable) of a precast pre-stressed concrete beam and reinforced concrete composite beam;
FIG. 3 is a schematic structural view of a precast prestressed concrete beam and reinforced concrete composite beam splicing bridge (non-equal height form+finish rolling bolt) according to the present invention;
Fig. 4 is a schematic structural view of a spliced bridge (non-equal height form + prestressed anchorage cable) of a precast prestressed concrete beam and reinforced concrete composite beam according to the present invention;
FIG. 5 is a cross-sectional view A-A of FIG. 1 (I-steel section reinforced concrete composite girder);
FIG. 6 is a cross-sectional view A-A of FIG. 1 (steel box girder cross-sectional reinforced concrete composite girder);
FIG. 7 is a cross-sectional view B-B (I-steel section reinforced concrete composite girder) of FIG. 2;
FIG. 8 is a cross-sectional view B-B of FIG. 2 (steel box girder cross-sectional reinforced concrete composite girder);
Fig. 9 is a schematic structural view of a precast prestressed concrete girder (finish rolling bolt) of the present invention;
FIG. 10 is a section view D-D of FIG. 9 (precast concrete box girder);
FIG. 11 is a sectional view D-D of FIG. 9 (precast concrete T-beam);
FIG. 12 is a cross-sectional view E-E of FIG. 9 (precast concrete deck beam);
FIG. 13 is a cross-sectional view E-E of FIG. 9 (precast concrete T-beams);
fig. 14 is a schematic structural view of a precast prestressed concrete girder (prestressed anchorage cable) according to the present invention;
FIG. 15 is a cross-sectional view F-F of FIG. 14 (precast concrete deck beam);
FIG. 16 is a cross-sectional view F-F of FIG. 14 (precast concrete T-beams);
FIG. 17 is a schematic view showing the structure of a steel-concrete composite girder (finish rolling bolt) of the present invention;
FIG. 18 is a cross-sectional view J-J of FIG. 17 (precast concrete box girder);
FIG. 19 is a cross-sectional view J-J of FIG. 17 (precast concrete T-beam);
FIG. 20 is a cross-sectional view K-K of FIG. 17 (precast concrete box girder);
FIG. 21 is a cross-sectional view K-K of FIG. 17 (precast concrete T-beam);
fig. 22 is a schematic structural view of a steel reinforced concrete composite beam (prestressed anchorage cable) of the present invention;
FIG. 23 is a cross-sectional view L-L of FIG. 22 (precast concrete deck beam);
FIG. 24 is a cross-sectional view L-L of FIG. 22 (precast concrete T-beams);
In the figure, 1-precast concrete slab, 2-steel beam, 3-shear connector, 4-finish rolling bolt, 5-precast prestressed concrete beam, 6-prestressed steel bar, 7-high strength bolt, 8-end steel plate, 9-anchoring steel plate, 10-post cast concrete, 11-end concrete block, 12-finish rolling bolt penetrating hole, 13-prestressed anchor rope, 14-reserved concrete post cast groove, 15-prestressed anchor rope penetrating hole, 16-bolt hole, 17-prestressed steel bar hole and 19-reserved anchoring groove.
Detailed Description
The invention will now be described in further detail with reference to the drawings and to specific examples.
As shown in fig. 1-24, the spliced bridge of the precast prestressed concrete beam and the reinforced concrete composite beam comprises a precast prestressed concrete beam 5 and a reinforced concrete composite beam, wherein the precast prestressed concrete beam adopts a precast concrete box beam or a precast concrete T-shaped beam, the reinforced concrete composite beam adopts a reinforced concrete composite beam with a steel box beam section or a reinforced concrete composite beam with an I-shaped steel section, a direct connection structure is adopted between the precast prestressed concrete beam 5 and the reinforced concrete composite beam, and an equal-height form or an unequal-height form is adopted between the precast prestressed concrete beam 5 and the reinforced 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 embedded in the end part concrete block 11, a prestressed reinforcement 6 is precast in the prestressed concrete beam 1, and a corrugated pipe is precast outside the prestressed reinforcement 6.
An end steel plate 8 is fixedly arranged at the end part of a steel beam 2 of the reinforced concrete composite beam, an anchoring steel plate 9 is arranged behind the end steel plate 8, a post-cast concrete 10 is filled between the end steel plate 8 and the anchoring steel plate 9, a shear connector 3 is fixedly arranged in a precast concrete slab 1 of the reinforced concrete composite beam, the shear connector 3 is welded at the top end of the steel beam 2 of the reinforced concrete composite beam, the high-strength bolts 7 penetrate through bolt holes 16 on the end steel plate 8 and are fixedly connected with the end steel plate 8, and the prestressed steel bars 6 penetrate through prestressed steel bar holes 17 on the end steel plate 8 and the anchoring steel plate 9 and are fixed on the anchoring steel plate 9.
The precast prestressed concrete beam 5 is fixedly connected with the precast concrete slab 1 of the reinforced concrete composite beam through finish rolling bolts 4 or prestressed anchor cables 13.
When the precast prestressed concrete beam 5 is fixedly connected with the precast concrete slab 1 of the reinforced concrete composite beam through finish rolling bolts 4, the finish rolling bolts 4 are pre-buried in the upper flange of the precast prestressed concrete beam 5, finish rolling bolt penetrating holes 12 are formed in the precast concrete slab 1 of the reinforced concrete composite beam, and reserved concrete post-pouring grooves 14 are formed in the precast concrete slab 1 at the rear end of the finish rolling bolt penetrating holes 12.
When the precast prestressed concrete beam 5 is fixedly connected with the precast concrete slab 1 of the reinforced concrete composite beam through the prestressed anchor cable 13, the prestressed anchor cable penetrating holes 15 are formed in the upper flange of the precast prestressed concrete beam 5 and in the precast concrete slab 1 of the reinforced concrete composite beam, and the reserved anchor grooves 19 are formed in the upper flange of the precast prestressed concrete beam 5 at two ends of the prestressed anchor cable penetrating holes 15 and in the precast concrete slab 1 of the reinforced concrete composite beam.
The construction method of the precast prestressed concrete beam and reinforced concrete composite beam spliced bridge comprises the following steps:
Step one, manufacturing a precast concrete box beam or a precast concrete T beam;
When the precast concrete box girder is manufactured, the steps are as follows:
① . Selecting a prefabricated field or a temporary storage yard near a construction site, and arranging a prefabricated pedestal in the prefabricated field or the temporary storage yard;
② . Simultaneously binding reinforcing steel bars on the prefabricated pedestal and forming a reinforcing steel bar cage;
③ . Installing and fixing the template;
④ . Simultaneously, arranging finish rolling bolts 4 or arranging pre-buried dies or corrugated pipes for forming pre-stressed anchor cable penetrating holes 15 in the upper flange of the precast concrete box girder;
⑤ . Pouring concrete into the template until the concrete is solidified and formed;
⑥ . Arranging high-strength bolts 7 at the end parts of the precast concrete box girders;
⑦ . Pouring concrete to the end part of the precast concrete box girder provided with the high-strength bolts 7 until the concrete is solidified and molded, so that the high-strength bolts 7 are fixed in the end part concrete blocks 11, and the precast concrete box girder is manufactured;
when manufacturing the precast concrete T beam, the steps are as follows:
① . Selecting a prefabricated field or a temporary storage yard near a construction site, and arranging a prefabricated pedestal in the prefabricated field or the temporary storage yard;
② . Simultaneously binding reinforcing steel bars on the prefabricated pedestal and forming a reinforcing steel bar cage;
③ . Installing and fixing the template;
④ . Simultaneously, arranging finish rolling bolts 4 or arranging pre-buried dies or corrugated pipes for forming pre-stressed anchor cable penetrating holes 15 in the upper flange of the precast concrete T beam;
⑤ . Pouring concrete into the template until the concrete is solidified and formed;
⑥ . Arranging a high-strength bolt 7 at the end part of the precast concrete T beam;
⑦ . Pouring concrete to the end part of the precast concrete T beam provided with the high-strength bolts 7 until the concrete is solidified and molded, so that the high-strength bolts 7 are fixed in the end part concrete blocks 11, and the precast concrete T beam is manufactured;
step two, manufacturing a steel-concrete composite beam with a steel box girder section or a steel-concrete composite beam with an I-steel section;
when manufacturing the steel-concrete composite beam with the steel box girder section, the steps are as follows:
① . Selecting a manufacturing factory of the steel-concrete composite beam with the steel box girder section;
② . A shear connector 3 is welded at the top end of a steel beam 2 of the steel-concrete composite beam with the steel box girder section;
③ . Arranging a pre-buried die or a corrugated pipe at the top end of a steel beam 2 of the steel-concrete composite beam with the steel box girder section to form a finish rolling bolt penetrating hole 12 or a pre-stressed anchor cable penetrating hole 15;
④ . Pouring concrete on the top end of the steel beam 2 until the concrete is solidified and formed, forming a precast concrete slab 1, and manufacturing the precast concrete slab 1 in a factory or a construction site;
⑤ . Welding an end steel plate 8 at the end of the steel-concrete composite beam with the steel box girder section, wherein bolt holes 16 and prestressed reinforcement holes 17 are formed in the end steel plate 8 according to design requirements;
⑥ . Welding an anchor steel plate 9 behind the end steel plate 8 according to design requirements, and processing a prestressed reinforcement hole 17 on the anchor steel plate 9 according to the design requirements, wherein the manufacturing of the steel-concrete composite beam with the steel box girder section is completed;
When manufacturing the I-steel section steel-concrete composite beam, the steps are as follows:
① . Selecting a manufacturing factory of the I-steel section steel-concrete composite beam;
② . A shear connector 3 is welded at the top end of a steel beam 2 of the I-steel section reinforced concrete composite beam;
③ . Arranging a pre-buried die or a corrugated pipe at the top end of a steel beam 2 of the I-steel section reinforced concrete composite beam to form a finish rolling bolt penetrating hole 12 or a pre-stressed anchor cable penetrating hole 15;
④ . Pouring concrete on the top end of the steel beam 2 until the concrete is solidified and formed, forming a precast concrete slab 1, and manufacturing the precast concrete slab 1 in a factory or a construction site;
⑤ . Welding an end steel plate 8 at the end part of the I-steel section reinforced concrete composite beam, wherein bolt holes 16 and prestressed reinforcement holes 17 are formed in the end steel plate 8 according to design requirements;
⑥ . Welding an anchor steel plate 9 behind the end steel plate 8 according to design requirements, and processing a prestressed reinforcement hole 17 on the anchor steel plate 9 according to the design requirements, wherein the manufacturing of the I-steel section reinforced concrete composite beam is completed;
Pre-tensioning the prestressed reinforcement 6, then butting the precast prestressed concrete beam 5 with the reinforced concrete composite beam, inserting the high-strength bolt 7 into the bolt hole 16 of the end steel plate 8, and fixing the high-strength bolt 7 with the end steel plate 8 by using a nut;
filling and packaging the space between the end steel plate 8 and the anchoring steel plate 9 by post-pouring concrete 10;
When the top flange of the precast concrete box girder or the precast concrete T girder is internally provided with finish rolling bolts 4, and the precast concrete slab 1 of the steel-concrete combined girder with the steel box girder section or the I-steel section is internally provided with finish rolling bolt penetrating holes 12, the finish rolling bolts 4 synchronously penetrate into the finish rolling bolt penetrating holes 12 when the precast prestressed concrete girder 5 is in butt joint with the steel-concrete combined girder, the finish rolling bolts 4 are fixed into the reserved concrete post-pouring groove 14 through nuts at the moment, and when the top flange of the precast concrete box girder or the precast concrete T girder, the precast concrete slab 1 of the steel-concrete combined girder with the steel box girder section or the I-steel section are respectively provided with the prestressed anchor rope penetrating holes 15, after the precast prestressed concrete girder 5 is in butt joint with the steel-concrete combined girder, the prestressed anchor rope 13 penetrates into the prestressed anchor rope penetrating holes 15, and is fixed into the reserved concrete post-pouring groove 14 or the reserved anchor groove 19 through anchors at the moment, and finally, the construction of concrete is completed and the construction of the reserved concrete post-pouring groove 14 or the reserved anchor groove 19 is completed, and the precast concrete bridge and the precast bridge combined girder are spliced.
The embodiments are not intended to limit the scope of the invention, but rather are intended to cover all equivalent implementations or modifications that can be made without departing from the scope of the invention.
Claims (1)
1. A construction method of a precast prestressed concrete beam and reinforced concrete composite beam spliced bridge comprises the steps of adopting a precast prestressed concrete beam and a reinforced concrete composite beam, wherein the precast prestressed concrete beam adopts a precast concrete box beam or a precast concrete T-beam, the reinforced concrete composite beam adopts a reinforced concrete composite beam or an I-shaped steel composite beam with a steel box beam section, a direct connection structure is adopted between the precast prestressed concrete beam and the reinforced concrete composite beam, an equal-height or unequal-height mode is adopted between the precast prestressed concrete beam and the reinforced concrete composite beam, an end concrete block is fixedly arranged at the end of the precast prestressed concrete beam, a high-strength bolt is pre-buried in the end concrete block, a prestressed steel bar is pre-arranged in the inside of the prestressed concrete beam, a bellows is pre-arranged outside the prestressed steel bar, an end steel plate is fixedly arranged at the steel beam end of the reinforced concrete composite beam, an anchor steel plate is arranged behind the end steel plate, filling is carried out by a rear concrete composite beam, a connecting piece is fixedly arranged inside the reinforced concrete composite beam, a shear force is fixedly connected with the precast concrete slab, the end of the precast concrete composite beam passes through the anchor bolt hole and passes through the precast concrete bolt, and passes through the end of the precast concrete composite steel bar, and passes through the end of the precast concrete bolt hole and the precast concrete composite bolt, when the precast prestressed concrete beam is fixedly connected with the precast concrete slab of the reinforced concrete composite beam through prestressed anchor cables, the precast prestressed anchor cable penetrating holes are formed in the upper flange of the precast prestressed concrete beam and the precast concrete slab of the reinforced concrete composite beam, and the precast anchor grooves are formed in the upper flange of the precast prestressed concrete beam at the two ends of the precast anchor cable penetrating holes and the precast concrete slab of the reinforced concrete composite beam, the construction method is characterized by comprising the following steps:
Step one, manufacturing a precast concrete box beam or a precast concrete T beam;
When the precast concrete box girder is manufactured, the steps are as follows:
① . Selecting a prefabricated field or a temporary storage yard near a construction site, and arranging a prefabricated pedestal in the prefabricated field or the temporary storage yard;
② . Simultaneously binding reinforcing steel bars on the prefabricated pedestal and forming a reinforcing steel bar cage;
③ . Installing and fixing the template;
④ . Simultaneously, arranging finish rolling bolts or arranging pre-buried dies or corrugated pipes for forming pre-stressed anchor cable penetrating holes in the upper flange of the precast concrete box girder;
⑤ . Pouring concrete into the template until the concrete is solidified and formed;
⑥ . Arranging high-strength bolts at the end parts of the precast concrete box girders;
⑦ . Pouring concrete to the end part of the precast concrete box girder provided with the high-strength bolts until the concrete is solidified and molded, so that the high-strength bolts are fixed in the end part concrete blocks, and the precast concrete box girder is manufactured;
when manufacturing the precast concrete T beam, the steps are as follows:
① . Selecting a prefabricated field or a temporary storage yard near a construction site, and arranging a prefabricated pedestal in the prefabricated field or the temporary storage yard;
② . Simultaneously binding reinforcing steel bars on the prefabricated pedestal and forming a reinforcing steel bar cage;
③ . Installing and fixing the template;
④ . Simultaneously, arranging finish rolling bolts or arranging pre-buried dies or corrugated pipes for forming pre-stressed anchor cable penetrating holes in the upper flange of the precast concrete T beam;
⑤ . Pouring concrete into the template until the concrete is solidified and formed;
⑥ . Arranging high-strength bolts at the end parts of the precast concrete T beams;
⑦ . Pouring concrete to the end part of the precast concrete T beam provided with the high-strength bolts until the concrete is solidified and molded, so that the high-strength bolts are fixed in the end part concrete blocks, and the precast concrete T beam is manufactured;
step two, manufacturing a steel-concrete composite beam with a steel box girder section or a steel-concrete composite beam with an I-steel section;
when manufacturing the steel-concrete composite beam with the steel box girder section, the steps are as follows:
① . Selecting a manufacturing factory of the steel-concrete composite beam with the steel box girder section;
② . Steel-concrete composite beam with steel box beam section the top end of the steel beam is welded with a shear connector;
③ . Arranging a pre-buried die or a corrugated pipe at the top end of a steel beam of the steel-concrete composite beam with the steel box girder section to form a finish rolling bolt penetrating hole or a pre-stress anchor cable penetrating hole;
④ . Pouring concrete on the top end of the steel beam until the concrete is solidified and formed, and forming a precast concrete slab, wherein the precast concrete slab is manufactured in a factory or a construction site;
⑤ . Welding an end steel plate at the end of the steel-concrete composite beam with the steel box girder section, wherein bolt holes and prestressed reinforcement holes are formed in the end steel plate according to design requirements;
⑥ . Welding an anchoring steel plate at the rear of the end steel plate according to the design requirement, and processing a prestressed reinforcement hole on the anchoring steel plate according to the design requirement, wherein the manufacturing of the steel-concrete composite beam with the section of the steel box girder is completed;
When manufacturing the I-steel section steel-concrete composite beam, the steps are as follows:
① . Selecting a manufacturing factory of the I-steel section steel-concrete composite beam;
② . Welding a shear connector on the top end of a steel beam of the I-steel section reinforced concrete composite beam;
③ . Arranging a pre-buried die or a corrugated pipe at the top end of a steel beam of the I-steel section reinforced concrete composite beam to form a finish rolling bolt penetrating hole or a pre-stress anchor cable penetrating hole;
④ . Pouring concrete on the top end of the steel beam until the concrete is solidified and formed, and forming a precast concrete slab, wherein the precast concrete slab is manufactured in a factory or a construction site;
⑤ . Welding an end steel plate at the end of the I-steel section reinforced concrete composite beam, wherein bolt holes and prestressed reinforcement holes are formed in the end steel plate according to design requirements;
⑥ . Welding an anchoring steel plate at the rear of the end steel plate according to the design requirement, and processing a prestressed reinforcement hole on the anchoring steel plate according to the design requirement, wherein the manufacturing of the I-steel section reinforced concrete composite beam is completed;
Pre-tensioning the prestressed reinforcement, then butting the precast prestressed concrete beam with the reinforced concrete composite beam, inserting a high-strength bolt into a bolt hole of an end steel plate, and fixing the high-strength bolt with the end steel plate by using a nut;
filling and packaging the space between the end steel plate and the anchoring steel plate by post-pouring concrete;
When the precast concrete box girder or the upper flange of the precast concrete T girder, and the precast concrete slab of the steel-concrete composite girder or the I-steel section steel-concrete composite girder are internally provided with finish rolling bolt penetrating holes in advance, the finish rolling bolts synchronously penetrate into the finish rolling bolt penetrating holes when the precast prestressed concrete girder is in butt joint with the steel-concrete composite girder, the finish rolling bolts are fixed into the reserved concrete post-pouring groove through nuts at the moment, when the precast concrete box girder or the upper flange of the precast concrete T girder, the precast concrete slab of the steel-concrete composite girder or the I-steel section steel-concrete composite girder are internally provided with the prestressed anchor rope penetrating holes in advance, after the precast prestressed concrete girder and the steel-concrete composite girder are in butt joint, the prestressed anchor rope is penetrated into the prestressed anchor rope penetrating holes, and is fixed into the reserved anchor groove through an anchor tool, and finally, the precast concrete is poured into the reserved concrete post-pouring groove or the reserved anchor groove to finish packaging, and the construction of the precast prestressed concrete girder and the steel-concrete composite girder splicing bridge is finished.
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| CN113026579A (en) * | 2021-01-14 | 2021-06-25 | 中铁七局集团第二工程有限公司 | Prestressed steel concrete combination box girder suspension splicing construction device |
| CN112832111B (en) * | 2021-01-14 | 2024-08-06 | 中铁七局集团第二工程有限公司 | Prestressed reinforced concrete combined continuous box girder bridge structural system |
| CN112796203A (en) * | 2021-01-27 | 2021-05-14 | 内蒙古大学 | Prefabricated steel-concrete combined small box girder bridge and its construction method |
| CN115434249A (en) * | 2022-09-01 | 2022-12-06 | 中铁广州工程局集团深圳工程有限公司 | Rapid sleeving and positioning method for inclined leg steel-concrete combined section |
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| CN101831866A (en) * | 2010-05-11 | 2010-09-15 | 天津市市政工程设计研究院 | Steel-concrete joint section structure of beams |
| CN102966050A (en) * | 2012-12-07 | 2013-03-13 | 清华大学 | Longitudinal connection method for steel-concrete combined beam and existing reinforced concrete T beam |
| CN211645912U (en) * | 2019-11-19 | 2020-10-09 | 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 splicing bridge |
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| KR101079616B1 (en) * | 2009-07-07 | 2011-11-03 | (주)삼현피에프 | Upper structure of continuous steel composite girder bridge for achieving easy installation and effective endurance for negative moment and method of constructing same |
| KR101209674B1 (en) * | 2011-12-01 | 2012-12-07 | 이현우 | The site built-up hybrid girder which is prestressed by gap difference of connection face of blocks |
| CN203188112U (en) * | 2013-04-19 | 2013-09-11 | 林同棪国际工程咨询（中国）有限公司 | Steel-concrete rigid-connection combined beam |
| CN204417983U (en) * | 2014-12-26 | 2015-06-24 | 北京交通大学 | A kind of prefabricated units on-site consolidation compound beam for rushing to repair concrete box girder |
| CN207032009U (en) * | 2017-08-03 | 2018-02-23 | 中交第二公路勘察设计研究院有限公司 | A kind of steel reinforced concrete joint based on UHPC |
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| CN101831866A (en) * | 2010-05-11 | 2010-09-15 | 天津市市政工程设计研究院 | Steel-concrete joint section structure of beams |
| CN102966050A (en) * | 2012-12-07 | 2013-03-13 | 清华大学 | Longitudinal connection method for steel-concrete combined beam and existing reinforced concrete T beam |
| CN211645912U (en) * | 2019-11-19 | 2020-10-09 | 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 splicing bridge |
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