CN112502025A - Rigid frame bridge with bolted sections and construction method thereof - Google Patents
Rigid frame bridge with bolted sections and construction method thereof Download PDFInfo
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- CN112502025A CN112502025A CN202011344145.5A CN202011344145A CN112502025A CN 112502025 A CN112502025 A CN 112502025A CN 202011344145 A CN202011344145 A CN 202011344145A CN 112502025 A CN112502025 A CN 112502025A
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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
- E01D19/00—Structural or constructional details of bridges
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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
- E01D19/00—Structural or constructional details of bridges
- E01D19/02—Piers; Abutments ; Protecting same against drifting ice
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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
- E01D19/00—Structural or constructional details of bridges
- E01D19/06—Arrangement, construction or bridging of expansion joints
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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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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/20—Concrete, stone or stone-like material
- E01D2101/24—Concrete
- E01D2101/26—Concrete reinforced
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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
- E01D2101/00—Material constitution of bridges
- E01D2101/30—Metal
Abstract
The invention discloses a rigid frame bridge with bolted sections, which comprises a plurality of prefabricated main beam sections, pier columns and prefabricated cross beams, wherein two adjacent prefabricated main beam sections are bolted through the prefabricated cross beams, and the pier columns are inserted into the prefabricated cross beams to form a hidden cross beam structure. Through hiding the bent cap into the girder construction, reduced the building height, improved the aesthetic feeling, and make this hidden beam structure into the steel prefab, it is less to hang the heavy, and the site operation is convenient. The prefabricated beam is internally provided with a slotted hole, a beam shear connector is arranged in the slotted hole, the stretching section of the pier stud is inserted into the slotted hole, rigid connection between the pier stud and the capping beam is realized through high-strength concrete grout, the steel consumption of the structure is reduced by utilizing the system advantages, and the manufacturing cost is saved. Meanwhile, a construction mode is disclosed, the main manufacture of the main beam structure is placed in a prefabrication plant, the construction method is favorable for ensuring the engineering quality, is suitable for the steel-concrete composite beam with larger span, is favorable for fully exerting the structural advantages of the steel-concrete composite beam, and has good technical and economic benefits and wide application prospect.
Description
Technical Field
The invention relates to the technical field of bridges, in particular to a rigid frame bridge bolted by sections and a construction method thereof.
Background
The traditional cast-in-place construction of the urban bridge easily causes the traffic capacity of a construction area to suddenly drop, influences the smoothness and safety of roads, and has the defects of large field operation amount, low construction efficiency, high overall energy consumption and serious citizen disturbance. The assembled bridge can remarkably accelerate the construction progress, reduce the interference to the existing traffic and be beneficial to environmental protection through the industrialized manufacturing and the assembled construction of the components.
In the fabricated bridge, the steel-concrete composite beam is easy to be designed into a fabricated member, and the steel-concrete composite beam exerts respective material advantages of steel and concrete, and is a bridge structure with strong competitiveness. The design method of the assembly type steel-concrete combined continuous beam commonly used at the present stage is to set the main beam as a longitudinal sectional component and to set a bent cap structure with a larger height, so that the structure height is increased, the building cost is improved, and the aesthetic feeling is reduced.
Disclosure of Invention
The invention aims to provide a rigid frame bridge with bolted sections and a construction method thereof, and aims to solve the problem that a cover beam structure with a large height needs to be arranged.
The technical scheme adopted for solving the technical problems is as follows: a section-bolted rigid frame bridge comprises a prefabricated girder section, wherein the prefabricated girder section comprises a girder top plate, a girder bottom plate, a girder web plate, a concrete plate and a plurality of top plate shear connectors, the concrete plate is arranged above the girder top plate, the top plate shear connectors are welded on the girder top plate and integrally connect the concrete plate and the girder top plate, and the girder web plate is arranged between the girder top plate and the girder bottom plate;
an extending section is arranged above the pier stud; and
the prefabricated beam comprises a beam top plate, a beam bottom plate, a beam web plate and a hole wall steel plate, the prefabricated beam is arranged above the pier stud and is provided with a main beam extending section, the beam bottom plate is provided with openings, the hole wall steel plate is arranged between the beam web plates, a slotted hole is formed between the hole wall steel plate and the beam web plate and is positioned outside the section of the beam web plate, the extending section is inserted into the slotted hole, a beam shear connecting piece is arranged inside the slotted hole, the beam top plate is provided with a grouting hole, a steel bar plate is arranged at the upper end of the pier stud, the steel bar plate is transversely arranged and inserted into the slotted hole, and the prefabricated beam is connected with the pier stud through high-strength concrete slurry; the prefabricated main beam segment can be divided into a prefabricated end segment and a prefabricated middle beam segment, a main beam top plate and a cross beam top plate are bolted, a main beam web plate and a cross beam web plate are bolted, and a main beam bottom plate and a cross beam bottom plate are bolted;
the prefabricated end section is divided into a prefabricated end section a and a prefabricated end section b, the prefabricated middle beam section is divided into a prefabricated middle beam section a and a prefabricated middle beam section b, the prefabricated end section b and the prefabricated middle beam section a are connected with the prefabricated cross beam, the connecting sections between the prefabricated end section b and the prefabricated cross beam section a form a longitudinal connecting section a, and the prefabricated end section a and the prefabricated end section b and the prefabricated middle beam section a and the prefabricated middle beam section b form a longitudinal connecting section b;
the adjacent main beam top plate, the main beam bottom plate and the main beam web plate between the longitudinal connecting sections b are mutually butted and are fixedly connected through bolts.
Has the advantages that: the hidden beam structure is formed by hiding the cover beam into the main beam structure, so that the building height is reduced, the aesthetic feeling is improved, and the hidden beam structure is made into a steel prefabricated part, so that the hoisting weight is small, and the site construction is convenient and fast; the prefabricated beam is internally provided with a slotted hole, the slotted hole is internally provided with a beam shear connector, the pier column overhanging steel bar is inserted into the slotted hole, and rigid connection between the pier column and the capping beam is realized through high-strength concrete grout, so that the steel consumption of the structure is reduced by utilizing the system advantages, and the manufacturing cost is saved. The transverse bridge position of the pier stud is located between the main beams, so that the complex node design between the pier stud and the main beams and between the pier stud and the cross beams is avoided, the arrangement is flexible, and the transverse position of the pier stud can be adjusted according to the actual situation on site. The prefabricated main beam sections are bolted between the sections, so that the problem of welding quality possibly caused by overhead welding of the bottom plate is avoided.
Further, this pier stud sets up to the rectangle structure, and the length that should stretch into the section should not be less than 1.2 times of this pier stud long limit size.
Further, this pier stud sets up to cylindrical structure, and this section of should stretching into sets up to circular or rectangle, and its length should not be less than 1.2 times of this pier stud diameter.
Further, the transverse bridge of this pier stud sets up the support ear to, should hold in the palm the ear top and set up the support, and this prefabricated crossbeam is provided with the support stiffening rib in support top inside.
Further, the girder web and the beam web are collectively called as webs, the girder bottom plate and the beam bottom plate are collectively called as bottom plates, and the girder top plate and the beam top plate are collectively called as top plates;
a first splice plate is arranged between the bottom plate and the web plate between the adjacent sections and is fastened and connected through a high-strength bolt; the second splice plate is arranged between the top plates of the adjacent sections and is fastened and connected through a high-strength bolt, the first splice plate is a common flat splice plate, the second splice plate comprises a horizontal plate and a plurality of vertical plates, the high-strength bolt penetrates through the top plate and the horizontal plate to connect the top plates of the adjacent sections into a whole, a transverse reinforcing steel bar penetrates through the vertical plates to connect the concrete plate in the range of the longitudinal connecting section and the top plate into a whole, and the connection of the adjacent girder structures is realized at the transverse connecting section through a wet seam of the transverse connecting section;
and a bottom plate shear connector is arranged in the bottom plate area of the main beam structure near the pier stud and is covered with beam bottom concrete to form a concrete reinforcing layer.
Further, a reserved section is arranged on one side, close to the prefabricated cross beam, of the prefabricated end b section.
Further, small cross beams are arranged between the prefabricated main beam sections.
A construction method of a rigid frame bridge with bolted sections is characterized by comprising the following steps:
s1, manufacturing a prefabricated cross beam, prefabricated end a sections, prefabricated end b sections, prefabricated middle beam a sections and prefabricated middle beam b sections.
S2, pouring or hoisting the pier stud, installing a support on the support lug, hoisting the prefabricated beam, inserting the extending section of the pier stud into the slotted hole in the prefabricated beam, and realizing connection by pouring a steel bar plate which is transversely arranged and inserted through the slotted hole through high-strength concrete grout.
And S3, arranging temporary piers hung below the longitudinal connecting sections a and b, connecting and fixing the sections by adopting full bolts, and pouring beam bottom concrete.
And S4, removing the temporary pier.
And S5, pouring wet joints of the longitudinal connecting sections b and wet joints of the transverse connecting sections.
And S6, pouring the reserved section of the prefabricated end section b and the concrete layer on the top of the prefabricated beam to form a hogging moment area wet joint, and applying a certain weight if necessary.
S7, constructing a bridge deck and accessory facilities.
Has the advantages that: the main manufacturing of the main beam structure is put in a prefabricating plant, which is favorable for ensuring the engineering quality, is suitable for the steel-concrete composite beam with larger span, is favorable for fully exerting the structural advantages of the steel-concrete composite beam, and has good technical and economic benefits and wide application prospect.
Further, in step S1, when the precast center sill b section is fabricated, the top beam is fixed to both ends of the precast center sill b section by using the reaction frame, the jack is arranged at the bottom of the precast center sill b section and applies the jacking force, the jacking force is replaced by the support of the bottom beam in the midspan when the jacking force reaches the predetermined value, and then the concrete slab at the top is poured.
Further, reinforcing ribs are provided at the bottom plates of the b-section of the precast center sill.
Drawings
The invention is further described with reference to the following figures and examples:
FIG. 1 is a sectional view of prefabricated main beam sections during subdivision;
FIG. 2 is a schematic side view of a slot;
FIG. 3 is a side view of the main beam;
FIG. 4 is a top view of a segmented bolted steel-concrete composite rigid frame system;
fig. 5 is a schematic cross-sectional view of a pier stud;
fig. 6 is a schematic cross-sectional view at a small cross-section.
Detailed Description
Referring to fig. 1 to 6, a section-bolted rigid frame bridge comprises a plurality of prefabricated main beam sections 1, piers 3 and prefabricated cross beams 2, wherein two adjacent prefabricated main beam sections 1 are bolted through the prefabricated cross beams 2, and the piers 3 are inserted into the prefabricated cross beams 2 to form a hidden cross beam structure. Specifically, the precast girder segment 1 includes a girder top plate 11, a girder bottom plate 13, a girder web 12, a concrete plate 14 and a plurality of top plate shear connectors, wherein the concrete plate 14 is disposed above the girder top plate 11, the top plate shear connectors are welded to the girder top plate 11 and integrally connect the concrete plate 14 and the girder top plate 11, the girder web 12 is welded between the girder top plate 11 and the girder bottom plate 13, and the materials of the girder top plate 11, the girder bottom plate 13 and the girder web 12 are steel girders. An extending section 31 is arranged above the pier stud 3. The prefabricated cross beam 2 comprises a cross beam top plate 21, a cross beam bottom plate 22, a cross beam web plate 23 and a hole wall steel plate 24, the prefabricated cross beam 2 is arranged above the pier stud 3 and is provided with a main beam extending section for being connected with the prefabricated end section 101 and the prefabricated middle beam section 102 to form a main beam structure, the connecting position is the longitudinal connecting section, and the adjacent main beam structures are connected through transverse connecting sections to form a bridge span structure. This crossbeam bottom plate 22 is equipped with the trompil, and the aperture of trompil is slightly greater than pier stud 3 diameter for the section 31 of stretching into of pier stud 3 can insert in prefabricated crossbeam 2. The hole wall steel plates 24 are arranged between the beam web plates 23, slotted holes are formed between the hole wall steel plates 24 and the beam web plates 23, the slotted holes are located on the outer sides of the sections of the main beam web plates 12, beam shear connectors 26 are welded inside the slotted holes, the stretching sections 31 are inserted into the slotted holes, the beam top plate 21 is provided with grouting holes, and the prefabricated beam 2 and the pier stud 3 are connected through high-strength concrete grout. Stretch into section 31 through setting up on pier stud 3, will stretch into section 31 and insert in the slotted hole for during the main beam structure is hidden into to the bent cap, form dark crossbeam structure, reduced the building height, improved the aesthetic feeling, and make this dark crossbeam structure the steel prefab, it is less to hang the heavy, and the site operation is convenient. The prefabricated beam 2 is internally provided with a slotted hole, a beam shear connector 26 is arranged in the slotted hole, the upper end of the pier stud 3 is provided with a steel bar plate 27, the steel bar plate 27 is transversely arranged and inserted into the slotted hole, the extension section 31 is inserted into the slotted hole, rigid connection between the pier stud 3 and the cover beam is realized through high-strength concrete grout, the steel consumption of the structure is reduced by utilizing the system advantages, and the manufacturing cost is saved. The prefabricated main beam segment 1 can be divided into a prefabricated end segment 101 and a prefabricated middle beam segment 102, wherein the prefabricated end segment 101 is positioned at the two ends of the bridge body, and the rest segments are called prefabricated middle beam segments 102. The main beam top plate 11 and the cross beam top plate 21 are bolted, the main beam web plate 12 and the cross beam web plate 23 are bolted, and the main beam bottom plate 13 and the cross beam bottom plate 22 are bolted. The prefabricated main beam segments 1 are bolted among the segments, so that the problem of welding quality possibly caused by overhead welding of the base plate is avoided. Preferably, to accommodate the manufacture of long span bridges, the prefabricated end segment 101 is divided into prefabricated end a-segments and prefabricated end b-segments. The precast center sill segment 102 is divided into a precast center sill a-segment and a precast center sill b-segment. The prefabricated end part b section, the prefabricated middle beam a section and the prefabricated cross beam 2 are connected, the longitudinal connecting section a is formed by the connecting sections between the prefabricated end part b section and the prefabricated middle beam a section, and the longitudinal connecting section b is formed between the prefabricated end part a section and the prefabricated end part b section and between the prefabricated middle beam a section and the prefabricated middle beam b section. Two main beam top plates 11 between the longitudinal connecting sections b are mutually butted and bolted and fixed, and adjacent main beam bottom plates 13 and main beam webs 12 between the longitudinal connecting sections b are mutually butted and tightly connected through bolts. Pouring the wet joint 8 of the longitudinal connecting section b in situ to form the longitudinal connecting section; the transverse connector section wet seam 4 is cast in place between adjacent concrete slabs 14 to form a transverse connector section.
Preferably, the pier 3 is configured as a rectangular structure, and the length of the extending section 31 should not be less than 1.2 times of the long side dimension of the pier 3.
Preferably, the pier 3 is configured as a cylinder, and the protruding section 31 is configured as a circle or rectangle, and the length thereof should not be less than 1.2 times the diameter of the pier 3.
Preferably, the pier stud 3 is provided with a support lug 32 in the transverse direction, a support 33 is arranged above the support lug 32, and the prefabricated beam 2 is provided with a support stiffening rib 25 inside above the support 33. The local stability is ensured, the concentrated force is transmitted, and the stability and the torsion resistance of the prefabricated beam 2 are improved.
With continued reference to FIG. 3, the spar webs 12 and beam webs 23 are collectively referred to as webs, the spar caps 13 and beam caps 22 are collectively referred to as caps, and the spar caps 11 and beam caps 21 are collectively referred to as caps. Specifically, a first splicing plate 71 is arranged between the bottom plate and the web plate between the adjacent sections and is fastened and connected through a high-strength bolt 73; the second splice plates are arranged between the top plates of the adjacent sections and are fixedly connected through high-strength bolts 73, the first splice plates 71 are ordinary flat plate splice plates, the second splice plates comprise a horizontal plate 721 and a plurality of vertical plates 722, the high-strength bolts 73 penetrate through the top plates and the horizontal plate 721 to connect the top plates of the adjacent sections into a whole, transverse reinforcing steel bars 723 penetrate through the vertical plates 722 to connect the concrete plates in the range of the longitudinal connecting section and the top plates into a whole, and the connection of the adjacent main beam structures is realized at the transverse connecting section through a transverse connecting section wet seam 4; and a bottom plate shear connector is arranged in the bottom plate area of the main beam structure near the pier stud 3 and is covered with beam bottom concrete to form a concrete reinforcing layer. The main beam bottom plate 13 and the cross beam bottom plate 22 which are positioned near the pier stud 3 are provided with bottom plate shear connectors to form a concrete reinforcing layer. The second splice plate not only realizes the fastening between the top plates, but also can connect the top plates and the concrete post-cast section into a whole, thereby avoiding the arrangement of the studs at the position and simplifying the construction. When the precast segments are manufactured, the precast center sill segments 102 are set to be pre-bent structures, so that the compression performance of concrete can be fully utilized and the steel consumption can be reduced for the precast center sill segments 102.
Preferably, when the segment is manufactured, a certain distance is left between the prefabricated end b segment and the side, close to the prefabricated cross beam 2, of the prefabricated end b segment, and concrete is not poured, so that the prefabricated end b segment is called a reserved segment.
Preferably, to improve structural stability and increase the area of the compression region, the width of the top plate at both ends is set to be greater than the width in the middle. The top plates at the two ends of the prefabricated main beam section 1 are widened and can be thickened properly when necessary, and a top plate shear connector is also arranged above the widened area of the top plate. Small cross beams are provided between the prefabricated main beam segments 1. The roof is widened and is cooperated with the connecting plate, so that the pressed area of the main beam structure is increased, the temporary pier 6 below the longitudinal connecting section can be detached after connection is completed, and the traffic interference to the road below is greatly reduced. Meanwhile, the second bolt not only realizes the fastening between the bottom plate of the negative bending moment area and the top plate of the positive bending moment area, but also can connect the top plate and the post-cast concrete section into a whole, thereby avoiding the arrangement of the stud at the position and simplifying the construction.
A construction method of a rigid frame bridge with bolted sections comprises the following steps:
s1, manufacturing the prefabricated cross beam 2, the prefabricated end a section, the prefabricated end b section, the prefabricated middle beam a section and the prefabricated middle beam b section.
S2, pouring or hoisting the pier stud 3, installing the support 33 on the support lug 32, hoisting the prefabricated beam 2, inserting the extension section 31 of the pier stud 3 into the slotted hole in the prefabricated beam 2, and realizing connection by pouring a steel bar plate which is transversely arranged and is inserted into the slotted hole through high-strength concrete slurry.
And S3, arranging temporary piers 6 which are hoisted below the longitudinal connecting sections a and b, connecting and fixing the sections by adopting full bolts, and pouring beam bottom concrete.
And S4, removing the temporary pier 6.
S5, pouring longitudinal connecting section b wet joint 8 and transverse connecting section wet joint 4.
And S6, pouring the reserved section of the prefabricated end section b and the concrete layer on the top of the prefabricated beam 2 to form the hogging moment area wet joint 5, and applying a certain weight if necessary.
S7, constructing a bridge deck and accessory facilities.
Preferably, the precast center sill segment 102 is set to a preflex structure, and in particular, in step S1, when the precast center sill b segment is fabricated, the top beam fixed to both ends of the segment is fixed by using a reaction frame, a jack is set at the bottom of the precast center sill b segment and a jacking force is applied, the support is replaced by a mid-sill support when the jacking force reaches a predetermined value, and then the top concrete slab 14 is poured.
Preferably, the bottom plate of the b-section of the beam in the prefabrication is provided with reinforcing ribs.
The prefabricated main beam segment 1 meets the requirement of coordination of engineering building modules, industrial large-scale production is facilitated, the width of the wet joint 4 of the transverse connecting section is adjustable, and the prefabricated main beam segment is suitable for application of a widening section. The main manufacturing of the main beam structure is put in a prefabricating plant, which is favorable for ensuring the engineering quality, is suitable for the steel-concrete composite beam with larger span, is favorable for fully exerting the structural advantages of the steel-concrete composite beam, and has good technical and economic benefits and wide application prospect.
While the embodiments of the present invention have been described in detail with reference to the drawings, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.
Claims (10)
1. A section bolted rigid frame bridge, comprising:
the prefabricated girder segment comprises a girder top plate, a girder bottom plate, a girder web plate, a concrete plate and a plurality of top plate shear connectors, wherein the concrete plate is arranged above the girder top plate;
an extending section is arranged above the pier stud; and
the prefabricated beam comprises a beam top plate, a beam bottom plate, a beam web plate and a hole wall steel plate, the prefabricated beam is arranged above the pier stud and is provided with a main beam extending section, the beam bottom plate is provided with an opening, the hole wall steel plate is arranged between the beam web plate, a slotted hole is formed between the hole wall steel plate and the beam web plate, the slotted hole is positioned outside the section of the main beam web plate, the extending section is inserted into the slotted hole, a beam shear connecting piece is arranged inside the slotted hole, the beam top plate is provided with a grouting hole, a steel rib plate is arranged at the upper end of the pier stud, the steel rib plate is transversely arranged and inserted through the slotted hole, and the prefabricated beam is connected with the pier stud through high-strength concrete grout; the prefabricated main beam sections can be divided into prefabricated end sections and prefabricated middle beam sections, the main beam top plate and the cross beam top plate are connected through bolts, the main beam web plate and the cross beam web plate are connected through bolts, and the main beam bottom plate and the cross beam bottom plate are connected through bolts; the prefabricated end sections are divided into prefabricated end a sections and prefabricated end b sections, the prefabricated middle beam sections are divided into prefabricated middle beam a sections and prefabricated middle beam b sections, the prefabricated end b sections and the prefabricated middle beam a sections are connected with the prefabricated cross beam, the connecting sections between the prefabricated end b sections and the prefabricated cross beam a sections form longitudinal connecting sections a, and the prefabricated end a sections and the prefabricated end b sections and the prefabricated middle beam a sections and the prefabricated middle beam b sections form longitudinal connecting sections b;
and adjacent main beam top plates, main beam bottom plates and main beam webs between the longitudinal connecting sections b are mutually butted and are fixedly connected through bolts.
2. The segment-bolted rigid frame bridge of claim 1, wherein:
the pier stud is arranged to be of a rectangular structure, and the length of the extending section is not less than 1.2 times of the size of the long edge of the pier stud.
3. The segment-bolted rigid frame bridge of claim 1, wherein:
the pier stud is arranged to be of a cylindrical structure, the stretching section is arranged to be circular or rectangular, and the length of the stretching section is not less than 1.2 times of the diameter of the pier stud.
4. The segment-bolted rigid frame bridge of claim 1, wherein:
the transverse bridge of the pier stud is provided with support lugs, a support is arranged above the support lugs, and support stiffening ribs are arranged inside the upper portion of the support of the prefabricated beam.
5. The segment-bolted rigid frame bridge of claim 1, wherein:
the main beam web and the cross beam web are collectively called webs, the main beam bottom plate and the cross beam bottom plate are collectively called bottom plates, and the main beam top plate and the cross beam top plate are collectively called top plates;
a first splice plate is arranged between the bottom plate and the web plate between the adjacent sections and is fastened and connected through a high-strength bolt; the second splice plates are arranged between the top plates of the adjacent sections and are fastened and connected through high-strength bolts, the first splice plates are ordinary flat splice plates, the second splice plates comprise a horizontal plate and a plurality of vertical plates, the high-strength bolts penetrate through the top plates and the horizontal plate to connect the top plates of the adjacent sections into a whole, transverse reinforcing steel bars penetrate through the vertical plates to enable concrete slabs in the range of the longitudinal connecting section to be connected with the top plates into a whole, and the connecting of the structures of the adjacent main beams is realized at the transverse connecting section through a wet seam of the transverse connecting section;
and a bottom plate shear connector is arranged in the bottom plate area of the main beam structure near the pier stud and is covered with beam bottom concrete to form a concrete reinforcing layer.
6. The segment-bolted rigid frame bridge of claim 1, wherein:
and a reserved section is arranged on one side, close to the prefabricated beam, of the prefabricated end part b section.
7. The segment-bolted rigid frame bridge of claim 1, wherein:
and a small cross beam is arranged between the prefabricated main beam sections.
8. A construction method of a rigid frame bridge with bolted sections is characterized by comprising the following steps:
s1, manufacturing a prefabricated cross beam, prefabricated end a sections, prefabricated end b sections, prefabricated middle beam a sections and prefabricated middle beam b sections.
S2, pouring or hoisting the pier stud, installing a support on the support lug, hoisting the prefabricated beam, inserting the extending section of the pier stud into the slotted hole in the prefabricated beam, and realizing connection by pouring a steel bar plate which is transversely arranged and inserted through the slotted hole through high-strength concrete grout.
And S3, arranging temporary piers hung below the longitudinal connecting sections a and b, connecting and fixing the sections by adopting full bolts, and pouring beam bottom concrete.
And S4, removing the temporary pier.
And S5, pouring wet joints of the longitudinal connecting sections b and wet joints of the transverse connecting sections.
And S6, pouring the reserved section of the prefabricated end section b and the concrete layer on the top of the prefabricated beam to form a hogging moment area wet joint, and applying a certain weight if necessary.
S7, constructing a bridge deck and accessory facilities.
9. The method of constructing a section-bolted rigid frame bridge according to claim 8, wherein:
in step S1, when the precast center sill b section is manufactured, the beam tops fixed at both ends of the precast center sill b section are fixed by using the reaction frame, the jack is arranged at the bottom of the precast center sill b section and applies the jacking force, the jacking force is replaced by the support across the bottom of the center sill when the jacking force reaches the preset value, and then the concrete slab at the top is poured.
10. The method of constructing a section-bolted rigid frame bridge according to claim 9, wherein: and reinforcing ribs are arranged on the bottom plate of the b section of the precast middle beam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011344145.5A CN112502025A (en) | 2020-11-25 | 2020-11-25 | Rigid frame bridge with bolted sections and construction method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011344145.5A CN112502025A (en) | 2020-11-25 | 2020-11-25 | Rigid frame bridge with bolted sections and construction method thereof |
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| CN112502025A true CN112502025A (en) | 2021-03-16 |
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| CN202011344145.5A Pending CN112502025A (en) | 2020-11-25 | 2020-11-25 | Rigid frame bridge with bolted sections and construction method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114214969A (en) * | 2021-12-01 | 2022-03-22 | 广州市市政工程设计研究总院有限公司 | Width splicing structure and method of width splicing bridge |
-
2020
- 2020-11-25 CN CN202011344145.5A patent/CN112502025A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114214969A (en) * | 2021-12-01 | 2022-03-22 | 广州市市政工程设计研究总院有限公司 | Width splicing structure and method of width splicing bridge |
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