CN110644348A - Connecting structure and construction method for prefabricated corrugated steel web combined box girder top plate - Google Patents
Connecting structure and construction method for prefabricated corrugated steel web combined box girder top plate Download PDFInfo
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- CN110644348A CN110644348A CN201910993030.XA CN201910993030A CN110644348A CN 110644348 A CN110644348 A CN 110644348A CN 201910993030 A CN201910993030 A CN 201910993030A CN 110644348 A CN110644348 A CN 110644348A
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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
- E01D2/04—Bridges characterised by the cross-section of their bearing spanning structure of the box-girder type
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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
The invention relates to a connecting structure of a prefabricated corrugated steel web combined box girder top plate, which comprises a top plate, a corrugated steel web and a shear connecting piece connected between the top plate and the corrugated steel web, wherein the corrugated steel web comprises an upper flange steel plate, and is characterized in that: the invention also provides a construction method, compared with the prior art, the construction method has the advantages that the precast concrete top plate reserved with the discontinuous mortises is directly hoisted to the upper flange steel plate of the corrugated steel web, and the assembly can be finished only by connecting the discontinuous shear connecting piece.
Description
Technical Field
The invention relates to a bridge engineering construction technology, in particular to a connecting structure and a construction method of a prefabricated corrugated steel web combined box girder top plate.
Background
The steel-concrete composite structure bridge is a bridge construction structure form which is characterized in that a steel member and a concrete member are connected into a whole through a shear connector, participate in stress together, and can give full play to the compression resistance of concrete and the tensile resistance of steel. In recent years, the steel-concrete composite beam formed by connecting the concrete top plate, the concrete bottom plate and the corrugated steel web plate into a whole through the shear connectors is reasonable in structure, can give full play to material performance, is convenient and quick to construct, and is widely applied. The shear connector is a quality key point of a steel-concrete composite structure bridge, and is related to the close combination of the web plate and the top plate and bottom plate concrete and the later-stage cooperative stress work, so that the structural safety and durability of the bridge are directly influenced. The common shear connector in engineering mainly comprises a double-perforated plate type, a bolt type, a combined type, an angle steel type and an embedded type. As for the double-perforated plate type, refer to fig. 2 disclosed in the attached drawings of the specification of japanese patent application No. JP2012273890 (publication No. JP2014118723A), the conventional continuous double-perforated plate type connecting piece easily causes the problem of connection fatigue caused by the disassembly and assembly of the prefabricated roof plate, and simultaneously requires the integral cast-in-place of the roof plate and the erection of a template during the cast-in-place; similarly combined shear connectors may also be referred to an outer skin deck for structural layers (including bridge layers, road layers, walkways, etc.) as disclosed in US patent application No. US56846495 (published as US5664378A), including composite structures of grid members and top members. The grid structure is preferably made of steel and comprises a plurality of main support rods and a plurality of distribution rods perpendicular to the main support rods, and the top structure is preferably made of reinforced concrete. The top of the embedded steel bar is provided with a clamping surface for realizing mechanical locking between the grid member and the concrete member and increasing the horizontal shear transmission between the grid member and the concrete member, but the top plate still needs to be provided with a template and poured with concrete, so that the formed concrete top plate is connected with the steel beam into a whole through a combined shear key. The above-mentioned steel web combination box girder bridge structure still can not avoid following problem: firstly, the method comprises the following steps: the top plate of the steel web box girder generally adopts a construction method of all in-situ pouring, the difficulty of in-situ construction operation is high, a template needs to be supported, cracks are easy to generate due to shrinkage and creep, and the construction progress is slow; secondly, concrete pouring maintenance and procedures are complicated, and meanwhile, the peripheral environment is greatly influenced by in-situ pouring; further improvements are needed for this purpose.
Disclosure of Invention
The first technical problem to be solved by the present invention is to provide a connection structure that can better ensure the integrity of a concrete top plate while increasing the shear connection between a corrugated steel web and the concrete top plate, in view of the above-mentioned current state of the art.
A second technical problem to be solved by the present invention is to provide a construction method that can avoid the erection of a formwork for a roof and shorten a construction period by applying the above connection structure to the above prior art.
In order to solve the first technical problem, the technical scheme adopted by the invention is as follows: this connection structure of prefabricated assembled corrugated steel web combination box girder roof, including roof, corrugated steel web and connect the shear force connecting piece between roof and corrugated steel web, the corrugated steel web is including top flange steel sheet, its characterized in that: at least two mortises have been seted up to the roof interval ground, and each the lower edge of mortise still is provided with the pre-buried penetrating steel bar of two at least perpendicular to wave form steel web, and shear connector is including connecting first steel sheet on the top flange steel sheet, first steel sheet is seted up at its length direction interval ground at least two confessions and is corresponded the card income portion that pre-buried penetrating steel bar blocked in, thereby realize: and under the condition that the top plate is connected to the upper surface of the upper flange steel plate of the corrugated steel web plate, the embedded through steel bars can be clamped into the corresponding clamping parts.
In order to facilitate the insertion of the embedded through steel bar, preferably, each insertion portion is formed by an L-shaped notch formed in a local part of the vertical steel plate of the first steel plate, and the reverse shape of each insertion portion is the same as that of the L-shaped notch.
In order to prevent the embedded through bars from falling out of the clamping portions of the first steel plate, each clamping portion preferably comprises a base portion, a transverse portion and a vertical portion, wherein the base portion is made of the first steel plate, the transverse portion is parallel to the base portion, the vertical portion is connected with the base portion and the transverse portion, a head portion is formed by locally forming a concave portion which is concave upwards from bottom to top on the lower surface of the transverse portion, and the relative distance H1 between the head portion and the base portion is smaller than the relative distance H2 between the concave portion and the base. Wherein base, horizontal portion and head form the accommodation space who holds pre-buried through reinforcement jointly to because relative distance H1 between the head of horizontal portion and the base is less than relative distance H2 between concave part and the base, make pre-buried through reinforcement difficult for falling out in the card-in of following first steel sheet.
In order to further prevent the embedded through steel bars from falling out of the clamping parts of the first steel plates, preferably, the shear connector further comprises a second steel plate, at least two grooves which are recessed from bottom to top and are communicated with the corresponding clamping parts are formed in the second steel plate at intervals along the length direction of the second steel plate, and a shielding part capable of shielding the vertical part of the L-shaped notch is formed between every two adjacent grooves.
Preferably, the groove is in the shape of an inverted C or U.
Further, the mortise is an inverted trapezoidal mortise with a large upper part and a small lower part. Wherein the tongue-and-groove is a big end up structure, more can stably fill the concrete in the inverted trapezoid tongue-and-groove.
In order to solve the second technical problem, the technical scheme adopted by the invention is as follows: the construction method of the connecting structure applying the prefabricated corrugated steel web combined box girder top plate is characterized in that: the method comprises the following steps:
prefabricating a concrete top plate with at least two mortises, and embedding the embedded through steel bars at the lower edges of the mortises of the top plate;
embedding an overhanging reinforcing steel bar vertical to the direction of the corrugated steel web plate on the upper edge of the rabbet of the mortise;
embedding a plurality of embedded steel bars perpendicular to the embedded through steel bars in the mortises, wherein the embedded steel bars are positioned below the overhanging steel bars and are uniformly distributed along the groove walls of the mortises;
fourthly, arranging the first steel plate along the length direction of the corrugated steel web plate, and fixing the first steel plate on the upper surface of the upper flange steel plate at the upper end of the corrugated steel web plate through welding;
placing the top plate on the upper surface of the upper flange steel plate of the corrugated steel web plate through hoisting, and clamping each embedded through steel bar into the clamping part of each corresponding first steel plate;
sixthly, the second steel plate penetrates through the mortise from top to bottom and is fixed on the upper surface of the upper flange steel plate of the corrugated steel web plate through field welding, the second steel plate is arranged on the outer side of the vertical steel plate of the first steel plate, and the first steel plate and the second steel plate are connected through bolts to form a reinforced perforated steel plate so as to fix the position of the embedded through steel bar;
seventhly, inserting at least two semi-closed stirrups with downward opening openings, which are arranged at intervals along the length direction of the corrugated steel web, into the mortises in sequence, and binding the plurality of embedded steel bars in the step three to form a steel bar cage;
eighthly, overlapping steel bars are erected between adjacent overhanging steel bars and are firmly bound with the steel bar cage after being welded;
ninthly, pouring self-compacting concrete to enable the corrugated steel web and the precast concrete top plate to be connected integrally, penetrating through the reinforced perforated steel plate formed by the first steel plate and the second steel plate through the embedded through steel bars, and forming shear keys under the combined action of cast-in-place concrete in the mortise.
The reinforced perforated steel plate combined by the first steel plate and the second steel plate and the shear key formed by the combined action of the embedded through steel bars and the concrete can effectively improve the shearing resistance, and the arrangement of a steel reinforcement cage can better restrain the concrete, so that the shear key and the concrete structure are more effectively coupled together, further prevent external force from cracking and deforming the concrete structure, and ensure the safety of the concrete structure.
Furthermore, the semi-closed stirrup is roughly trapezoidal with a wide upper part and a narrow lower part, and comprises a first stirrup leg and a second stirrup leg which are positioned at the lower part and are oppositely arranged, a gap between the first stirrup leg and the second stirrup leg forms the opening, and the opening can be used for each embedded steel bar embedded in the mortise to enter.
Furthermore, each embedded steel bar in the fifth step is perpendicular to the embedded through steel bars, and comprises a first embedded steel bar and a second embedded steel bar which are positioned below the embedded through steel bars, a first hoop foot of the semi-closed hoop hoops the first embedded steel bar, and a second hoop foot of the semi-closed hoop hoops the second embedded steel bar. Because the first stirrup leg of the semi-closed stirrup hoops the first embedded steel bar and the second stirrup leg of the semi-closed stirrup hoops the second embedded steel bar, the reinforcement cage and post-cast concrete can form a same stressed whole, the stress coordination can be ensured, the balanced distribution of shear force is facilitated, the longitudinal shear resistance performance is strong, and the anti-pulling effect is good.
Compared with the prior art, the invention has the advantages that the precast concrete top plate with the reserved discontinuous mortises is directly hoisted to the upper flange steel plate of the corrugated steel web, the assembly can be finished only by connecting discontinuous shear connectors, the connection between the precast concrete top plate and the corrugated steel web is effectively enhanced by connecting the embedded through steel bars and the discontinuous perforated first steel plate and pouring concrete after the mortises with large upper openings and small lower openings; the prefabricated concrete top plate with the reserved discontinuous large-upper-small mortises and the reserved small-lower-upper-small mortises is adopted to reduce the disassembly of components, ensure the integrity of the components and realize the assembly construction of the corrugated steel web plate combined box girder top plate.
Drawings
FIG. 1 is a schematic perspective view of an assembled prefabricated corrugated steel web composite box girder of the present invention after an intermittent connection structure and a precast concrete top plate are assembled;
FIG. 2 is a front view of the assembled prefabricated corrugated steel web composite box girder of the present invention after the intermittent connecting structure and the prefabricated concrete top plate are assembled;
FIG. 3 is a schematic perspective view of an intermittent connection structure of the prefabricated corrugated steel web composite box girder according to the present invention;
FIG. 4 is a left side view of the intermittent connecting structure of the prefabricated corrugated steel web composite box girder of the present invention;
FIG. 5 is a schematic structural view of the reinforcement cage of the present invention;
FIG. 6 is a schematic structural view of a second steel plate according to the present invention;
FIG. 7 is a schematic structural view of a first steel plate according to the present invention;
FIG. 8 is a schematic structural view of a reinforced perforated steel plate formed by a second steel plate and a first steel plate and welded to the upper surface of an upper flange steel plate according to the present invention;
fig. 9 is a schematic structural view of the top plate of the present invention.
Detailed Description
The invention is described in further detail below with reference to the accompanying examples.
As shown in FIGS. 1 to 9, the preferred embodiment of the present invention is shown. The connection structure of prefabricated assembled corrugated steel web combination box girder roof in this embodiment, including roof 1, corrugated steel web 2 and the shear force connecting piece of connection between roof 1 and corrugated steel web 2, corrugated steel web 2 is including last flange steel sheet 3, at least two tongue-and-groove 11 have been seted up to roof 1 interval, and still be provided with the pre-buried reinforcing bar 4 that link up of two at least perpendicular to corrugated steel web 2 at the lower edge of each tongue-and-groove 11, and shear force connecting piece is including connecting the first steel sheet 8 on last flange steel sheet 3, first steel sheet 8 is seted up the card income portion 81 that the pre-buried reinforcing bar 4 card that link up that supplies to correspond two at least confession along its length direction interval, thereby realize: each embedded through reinforcement 4 can be engaged into the corresponding engaging portion 81 in a state where the top plate 1 is connected to the upper surface of the upper flange steel plate 3 of the corrugated steel web 2.
In order to facilitate the insertion of the embedded through steel bars 4, each insertion portion 81 is formed by an L-shaped notch 82 partially opened in the vertical steel plate of the first steel plate 8, and each insertion portion 81 has the same reverse shape as the L-shaped notch 82. In order to prevent the embedded through-bars 4 from falling out of the embedded through-bars 81 of the first steel plate 8, each embedded part 81 includes a base 811 made of a transverse steel plate of the first steel plate 8, a transverse part 812 parallel to the base 811, and a vertical part 813 connecting the base 811 and the transverse part 812, a head 8122 is formed by partially having a concave part 8121 concave upward from bottom to top on a lower surface of the transverse part 812, and a relative distance H1 between the head 8122 and the base 811 is smaller than a relative distance H2 between the concave part 8121 and the base. The base 811, the transverse portion 812 and the head 8122 together form an accommodating space for accommodating the embedded through-bars 4, and since the relative distance H1 between the head 8122 and the base 811 of the transverse portion 812 is smaller than the relative distance H2 between the concave portion 8121 and the base, the embedded through-bars 4 are not easy to fall out of the clamping portion 81 of the first steel plate 8. In order to further prevent the embedded through steel bars 4 from falling out of the clamping-in portions 81 of the first steel plates 8, the shear connector further comprises second steel plates 9, at least two grooves 91 which are recessed from bottom to top and communicated with the corresponding clamping-in portions 81 are formed in the second steel plates 9 at intervals along the length direction of the second steel plates 9, and shielding portions 92 capable of shielding vertical portions 821 of the L-shaped notches 82 are formed between the adjacent grooves 91. Wherein the groove 91 is preferably in the form of an inverted C-shape or U-shape. The mortise 11 is an inverted trapezoidal mortise 11 with a large top and a small bottom, wherein the mortise 11 has a structure with a large top and a small bottom, and can be filled with concrete stably in the inverted trapezoidal mortise 11.
The embodiment also provides a construction method of a connecting structure applying the prefabricated corrugated steel web combined box girder top plate, which comprises the following steps:
firstly, prefabricating a concrete top plate 1 with at least two mortises 11, and embedding embedded through steel bars 4 at the lower edges of the mortises 11 of the top plate 1;
embedding an overhanging reinforcing steel bar 7 vertical to the direction of the corrugated steel web plate 2 on the upper edge of the notch of the mortise 11;
embedding a plurality of embedded steel bars 50 vertical to the embedded through steel bars 4 in the mortise 11, wherein the embedded steel bars 50 are positioned below the overhanging steel bars 7 and are uniformly distributed along the wall of the mortise 11;
fourthly, arranging the first steel plate 8 along the length direction of the corrugated steel web 2, and fixing the first steel plate at the upper surface of the upper flange steel plate 3 at the upper end of the corrugated steel web 2 by welding;
placing the top plate 1 on the upper surface of the upper flange steel plate 3 of the corrugated steel web 2 through hoisting, and clamping each embedded through steel bar 4 into the corresponding clamping part 81 of each first steel plate 8;
sixthly, a second steel plate 9 penetrates through the mortise 11 from top to bottom and is fixed on the upper surface of the upper flange steel plate 3 of the corrugated steel web 2 through field welding, the second steel plate is arranged on the outer side of the vertical steel plate of the first steel plate 8, and the first steel plate 8 and the second steel plate 9 are connected through bolts to form a reinforced perforated steel plate so as to fix the position of the embedded through steel bar 4;
seventhly, inserting at least two semi-closed stirrups with downward opening openings 510 arranged at intervals along the length direction of the corrugated steel web 2 into the mortise 11 in sequence, and binding the plurality of embedded steel bars 50 in the step three to form a steel bar cage 5; the semi-closed stirrup 51 in the step (c) is roughly trapezoidal with a wide upper part and a narrow lower part, and comprises a first stirrup 511 and a second stirrup 512 which are positioned at the lower part and are oppositely arranged, wherein a gap between the first stirrup 511 and the second stirrup 512 forms an opening 510, the opening 510 can be used for each embedded steel bar 50 embedded in the mortise 11 to enter, each embedded steel bar 50 in the step (c) is arranged perpendicular to the embedded through steel bar 4 and comprises a first embedded steel bar 501 and a second embedded steel bar 502 which are positioned below the embedded through steel bar 4, the first stirrup 511 of the semi-closed stirrup 51 hoops the first embedded steel bar 501, and the second stirrup 512 of the semi-closed stirrup 51 hoops the second embedded steel bar 502. Because the first hoop foot 511 of the semi-closed hoop 51 hoops the first embedded steel bar 501 and the second hoop foot 512 of the semi-closed hoop 51 hoops the second embedded steel bar 502, the reinforcement cage 5 and the post-cast concrete can form a same stressed whole, so that the stress coordination can be ensured, the balanced distribution of the shearing force is facilitated, the longitudinal shearing resistance performance is strong, and the pulling resistance effect is good. As shown in fig. 5, each embedded steel bar 50 has, in addition to the first strap 511 and the second strap 512 below the embedded through steel bar 4, other embedded steel bars 50 that are located above the embedded through steel bar 4 and below the external steel bar 7 and are uniformly distributed along the wall of the mortise 11, although the number of each embedded steel bar 50 can be adaptively changed according to the construction requirements, and each embedded steel bar 50 protrudes from the mortise 11, so that the coupling between the concrete and the member is achieved with a large deflection stiffness.
Eighthly, overlapping steel bars 6 are erected between the adjacent overhanging steel bars 7 and are welded through the overlapping steel bars 6 and then firmly bound with the steel bar cage 5;
ninthly, pouring self-compacting concrete at last to enable the corrugated steel web 2 and the precast concrete top plate 1 to be connected into a whole, and pre-buried through reinforcement 4 runs through the reinforced perforated steel plate formed by the first steel plate 8 and the second steel plate 9 and forms a shear key with the cast-in-place concrete in the mortise 11. The embedded through steel bars 4 embedded at the lower edges of the mortises 11 of the top plate 1 protrude from the mortises 11, have high deviation rigidity, realize the coupling between concrete and members, and can stably transfer the shearing force acting between the concrete and the shear connecting piece. In addition, the reinforced perforated steel plate formed by combining the first steel plate 8 and the second steel plate 9 and the shear key formed by the combined action of the embedded through steel bars 4 and the concrete can effectively improve the shearing resistance, and the arrangement of the steel reinforcement cage 5 can better restrain the concrete, so that the shear key and the concrete structure are coupled together more effectively, the cracking and the deformation of the concrete structure caused by external force are further prevented, and the safety of the concrete structure is ensured. In the embodiment, the precast concrete top plate 1 reserved with the discontinuous large-upper-small-lower-opening mortise 11 is directly hoisted to the upper flange steel plate 3 of the corrugated steel web 2, and the assembly can be finished only by connecting the discontinuous shear connecting piece, and the connection between the precast concrete top plate 1 and the corrugated steel web 2 is effectively enhanced by pre-burying the through steel bars 4 and the discontinuous perforated steel plate and pouring concrete after the mortise 11 with the large upper opening and the small lower opening; the prefabricated concrete top plate 1 reserved with the discontinuous large-upper small-lower mortise 11 is adopted to reduce component disassembly, ensure component integrity and realize the assembly construction of the corrugated steel web 2 combined box girder top plate 1.
Claims (9)
1. The utility model provides a connection structure of prefabricated assembled corrugated steel web combination box girder roof, including roof (1), corrugated steel web (2) and connect the shear force connecting piece between roof (1) and corrugated steel web (2), corrugated steel web (2) are including top flange steel sheet (3), its characterized in that: roof (1) has seted up two at least tongue-and-groove (11) at an interval, and each the lower edge of tongue-and-groove (11) still is provided with pre-buried penetrating steel (4) of two at least perpendicular to wave form steel web (2), and shear force connecting piece is including connecting first steel sheet (8) on top flange steel sheet (3), first steel sheet (8) have seted up two at least confessions along its length direction interval and have corresponded card income portion (81) that pre-buried penetrating steel (4) were gone into to realize: the top plate (1) is connected to the upper surface of the upper flange steel plate (3) of the corrugated steel web (2), and the embedded through steel bars (4) can be clamped into the corresponding clamping parts (81).
2. The connecting structure of the prefabricated corrugated steel web combined box girder top plate according to claim 1, is characterized in that: each clamping part (81) is formed by an L-shaped notch (82) formed in a part of the first steel plate (8), and the reverse shape of each clamping part (81) is the same as that of the L-shaped notch (82).
3. The connecting structure of the prefabricated corrugated steel web combined box girder top plate according to claim 2, is characterized in that: each clamping part (81) comprises a base part (811) which is made of the first steel plate (8), a transverse part (812) which is parallel to the base part (811), and a vertical part (813) which connects the base part (811) and the transverse part (812), wherein the lower surface of the transverse part (812) is locally provided with a concave part (8121) which is concave upwards from bottom to top to form a head part (8122), and the relative distance H1 between the head part (8122) and the base part (811) is smaller than the relative distance H2 between the concave part (8121) and the base.
4. The connecting structure of the prefabricated corrugated steel web combined box girder top plate according to claim 3, is characterized in that: the shear connector further comprises a second steel plate (9), at least two grooves (91) which are recessed from bottom to top and are communicated with the corresponding clamping-in portions (81) are formed in the second steel plate (9) along the length direction of the second steel plate at intervals, and shielding portions (92) capable of shielding vertical portions (821) of the L-shaped notches (82) are formed between the adjacent grooves (91).
5. The connecting structure of the prefabricated corrugated steel web combined box girder top plate according to claim 4, is characterized in that: the groove (91) is in an inverted C shape or U shape.
6. The connecting structure of the prefabricated corrugated steel web combined box girder top plate according to any one of claims 1 to 5, wherein: the mortise (11) is an inverted trapezoidal mortise (11) with a large upper part and a small lower part.
7. A construction method for applying a connecting structure of a prefabricated corrugated steel web combined box girder top plate according to any one of claims 1 to 6 is characterized in that: the method comprises the following steps:
prefabricating a concrete top plate (1) with at least two mortises (11), and embedding the embedded through steel bars (4) at the lower edges of the mortises (11) of the top plate (1);
embedding an outward extending reinforcing steel bar (7) vertical to the direction of the corrugated steel web plate (2) in the upper edge of the notch of the mortise (11);
embedding a plurality of embedded steel bars (50) vertical to the embedded through steel bars (4) in the mortises (11), wherein the embedded steel bars (50) are positioned below the overhanging steel bars (7) and are uniformly distributed along the groove walls of the mortises (11);
fourthly, arranging the first steel plate (8) along the length direction of the corrugated steel web (2), and fixing the first steel plate at the upper surface of the upper flange steel plate (3) at the upper end of the corrugated steel web (2) through welding;
placing the top plate (1) on the upper surface of an upper flange steel plate (3) of the corrugated steel web plate (2) through hoisting, and clamping each embedded through steel bar (4) into the clamping part (81) of each corresponding first steel plate (8);
sixthly, the second steel plate (9) penetrates through the mortise (11) from top to bottom and is fixed on the upper surface of the upper flange steel plate (3) of the corrugated steel web plate (2) through field welding, the second steel plate is arranged on the outer side of the vertical steel plate of the first steel plate (8), and the first steel plate (8) and the second steel plate (9) are connected through bolts to form a reinforced perforated steel plate so as to fix the position of the embedded through steel bar (4);
seventhly, inserting at least two semi-closed stirrups with downward opening openings (510) arranged at intervals along the length direction of the corrugated steel web (2) into the mortises (11) in sequence, and binding the embedded steel bars (50) in the step III to form a steel bar cage (5);
eighthly, overlapping steel bars (6) are erected between the adjacent overhanging steel bars (7), and the overlapping steel bars (6) are welded and then firmly bound with the steel bar cage (5);
ninthly, pouring self-compacting concrete at last to enable the corrugated steel web (2) and the precast concrete top plate (1) to be connected integrally, penetrating through the reinforced perforated steel plate formed by the first steel plate (8) and the second steel plate (9) in a pre-buried mode, and forming a shear key under the combined action of cast-in-place concrete in the mortise (11).
8. The construction method according to claim 7, wherein: the semi-closed stirrup (51) in the step (c) is roughly in a trapezoid shape with a wide upper part and a narrow lower part, and comprises a first hoop leg (511) and a second hoop leg (512) which are positioned at the lower part and oppositely arranged, a gap between the first hoop leg (511) and the second hoop leg (512) forms the opening (510), and the opening (510) can be used for each embedded steel bar (50) embedded in the mortise (11) to enter.
9. The construction method according to claim 8, wherein: the embedded steel bars (50) in the step (c) comprise first embedded steel bars (501) and second embedded steel bars (502) which are located below the embedded through steel bars (4), the first embedded steel bars (501) are hooped by first hooping feet (511) of the semi-closed hooping (51), and the second embedded steel bars (502) are hooped by second hooping feet (512) of the semi-closed hooping (51).
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| CN112376385A (en) * | 2020-12-09 | 2021-02-19 | 南京工业大学 | Prefabricated corrugated steel web composite beam bridge and construction method thereof |
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| CN112376385A (en) * | 2020-12-09 | 2021-02-19 | 南京工业大学 | Prefabricated corrugated steel web composite beam bridge and construction method thereof |
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