CN110055881B - Bridge deck continuous construction and construction method suitable for simply supported girder bridge - Google Patents
Bridge deck continuous construction and construction method suitable for simply supported girder bridge Download PDFInfo
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- CN110055881B CN110055881B CN201910484734.4A CN201910484734A CN110055881B CN 110055881 B CN110055881 B CN 110055881B CN 201910484734 A CN201910484734 A CN 201910484734A CN 110055881 B CN110055881 B CN 110055881B
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- 238000010276 construction Methods 0.000 title claims abstract description 26
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 175
- 239000010959 steel Substances 0.000 claims abstract description 175
- 239000004567 concrete Substances 0.000 claims abstract description 25
- 238000007906 compression Methods 0.000 claims abstract description 24
- 238000004873 anchoring Methods 0.000 claims abstract description 19
- 230000006835 compression Effects 0.000 claims abstract description 17
- 238000005336 cracking Methods 0.000 claims abstract description 12
- 210000001503 joint Anatomy 0.000 claims description 16
- 238000011065 in-situ storage Methods 0.000 claims description 11
- 239000010426 asphalt Substances 0.000 claims description 5
- 239000000835 fiber Substances 0.000 claims description 4
- 230000003014 reinforcing effect Effects 0.000 claims 2
- 238000003825 pressing Methods 0.000 abstract description 7
- 238000006073 displacement reaction Methods 0.000 description 7
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 5
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000009417 prefabrication Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
Classifications
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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
- E01D19/06—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
- E01D19/00—Structural or constructional details of bridges
- E01D19/12—Grating or flooring for bridges; Fastening railway sleepers or tracks to bridges
- E01D19/125—Grating or flooring for bridges
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The bridge deck continuous structure comprises a simply supported beam, wherein the bridge deck continuous structure is arranged at a structural joint, the bridge deck continuous structure comprises a top end limiting device and a bottom end limiting device, the top end limiting device comprises a tensile steel plate, the tensile steel plate is fixed at the bottoms of two adjacent limiting notch grooves along the bridge width through anchoring steel bars and covers the structural joint, and the top surface of the tensile steel plate is fixed with a plurality of anti-crack steel bars side by side along the bridge length direction; the anchoring steel bars are symmetrically distributed at two ends of the structural joint; the bottom end limiting device comprises a tensile compression steel pipe; the prefabricated end cross beams at two ends of the structural joint are internally provided with embedded steel cylinders, steel sleeves are fixed between the adjacent embedded steel cylinders, and the tensile steel pressing pipes are fixed in the embedded steel cylinders and the steel sleeves. The construction method comprises the following steps: prefabricating a simply supported beam; abutting the beams; the bridge is connected into a whole; constructing a paving layer; constructing a bottom end limiting device; and (5) constructing a top end limiting device. The invention can solve the technical problem of concrete cracking at the continuous part of the existing bridge deck.
Description
Technical Field
The invention relates to the field of bridge structure construction, in particular to a bridge deck continuous construction and a construction method suitable for a simply supported girder bridge.
Background
At present, the bridge deck continuous structure of the domestic simply supported beam bridge mainly adopts embedded bars and cast-in-place concrete bridge deck to form bridge deck continuous, and the relative rotation angle and longitudinal displacement of the beam ends of the precast beams at two ends are limited due to the lack of effective constructional measures on the precast beams, so that after the bridge is passed through, the beam ends at the continuous position of the bridge deck are easy to generate larger longitudinal and rotation angle displacement, and further, the concrete at the continuous position of the bridge deck is cracked, so that the travelling comfort is affected. Therefore, the operation stage needs to repair the bridge deck continuous structure for multiple times, which not only affects the normal operation, but also increases the overall engineering cost.
Disclosure of Invention
In order to overcome the defects and shortcomings of the technology, the invention provides a bridge deck continuous structure and a construction method suitable for a simply supported girder bridge, which can solve the technical problems that the bridge end of the bridge deck continuous part of the existing simply supported girder bridge is easy to generate larger longitudinal and corner displacement, and further the concrete at the bridge deck continuous part is cracked.
The invention adopts the following technical scheme:
the bridge deck continuous structure suitable for the simply supported girder bridge comprises a simply supported girder, wherein the simply supported girder comprises a main girder and prefabricated end cross beams at two sides of the girder end, the simply supported girder is arranged into one or a plurality of simply supported girders side by side, and cast-in-situ end cross beams and wet joints are arranged between the simply supported girders to connect the simply supported girders into an integral bridge in the bridge width direction; the bridge is formed by integrating multiple sections in pairs in the length direction of the bridge, structural joints are reserved between the butted bridges, bridge deck continuous structures are arranged at the structural joints, each bridge deck continuous structure comprises a top end limiting device and a bottom end limiting device,
the upper corners of the butt joint sides of the two butted simply supported beams are symmetrically provided with limit notch grooves which are parallel to the structural slits, transversely span the bridge width and are open on the upper surface and the opposite surface, and are communicated with the middle structural slits; the top surface of the concrete in the wet joint is level with the bottom surface of the limiting notch groove;
the top end limiting device comprises a tensile steel plate, the tensile steel plate is fixed at the bottoms of two adjacent limiting notch grooves along the bridge width through anchor steel bars and covers the structural joint, and the top surface of the tensile steel plate is fixedly provided with a plurality of anti-cracking steel bars side by side along the bridge length direction; the anchoring steel bars are symmetrically distributed at two ends of the structural joint; pouring concrete on the tensile steel plate, filling the limit notch groove and trowelling the upper part of the structural joint;
the bottom end limiting device comprises a tensile compression steel pipe; the prefabricated end cross beams at two ends of the structural joint are internally provided with embedded steel cylinders along the length direction of the bridge, steel sleeves which are coaxial with the embedded steel cylinders and have equal diameters are fixed between the adjacent embedded steel cylinders, and the tensile steel pressing sleeves are internally fixed in the adjacent embedded steel cylinders and the steel sleeves.
Two ends of the tensile compression steel pipe respectively penetrate through embedded steel cylinders in the beams at the two ends of the prefabricated end, and stiffening ribs are arranged at the end parts; and stiffening ribs are arranged at two ends of the steel sleeve.
A ring-shaped flange is arranged at both ends of the embedded steel cylinder, and the outer end face of the flange is clung and parallel to the outer side face of the precast end beam; and the stiffening ribs at the two ends of the tensile compression steel pipe and the steel sleeve are respectively welded and fixed with the flange of the embedded steel cylinder.
The anti-cracking reinforcing steel bars are rectangular annular closed reinforcing steel bars and comprise a pair of vertical reinforcing steel bars and a pair of horizontal reinforcing steel bars, and the horizontal reinforcing steel bars at the bottom are welded and fixed on two sides of the tensile steel plate.
The anchoring steel bar is U-shaped and comprises a pair of vertical bars and a horizontal bar at the bottom, the horizontal bar is embedded into the bridge, and the top end of the vertical bar passes through the tensile steel plate; the tensile steel plate is connected with the top end of the anchoring steel bar through an anchoring bolt in a threaded manner and anchored in each limit notch groove.
A construction method suitable for bridge deck continuous construction of a simply supported girder bridge comprises the following steps:
1) Prefabricating a simply supported beam: a gap is reserved at the upper part of the butt joint end of the simply supported beam, anchoring steel bars are embedded in the gap, and an embedded steel cylinder is arranged in a prefabricated end cross beam of the butt joint end of the simply supported beam;
2) The simple supporting beams are arranged on the bridge site and erected on the support; the simply supported beams are butted in the bridge length direction to form a structural joint;
3) Constructing a cast-in-situ end cross beam and a cast-in-situ wet seam among the simply supported beams, and connecting the simply supported beams into an integral bridge in the width direction;
4) Constructing a concrete bridge deck pavement layer and an asphalt pavement layer on the anti-collision guardrails on two sides of the bridge and the upper part of the bridge;
5) Fixing steel sleeves between the pre-embedded steel cylinders in the two precast end cross beams at the two ends of the structural joint, and fixing the tensile steel pressing pipes by welding through the pre-embedded steel cylinders at the two ends of the structural joint and the steel sleeves in the middle; the two ends of the tensile pressing steel pipe extend out of the embedded steel cylinder;
6) Stiffening ribs are arranged at two ends of the tensile pressing steel pipe, stiffening ribs are arranged at two ends of the steel sleeve, and the stiffening ribs at all positions are welded and fixed with flanges at the ends of the embedded steel cylinder at corresponding positions respectively;
7) Placing a tensile pressing steel plate with an annular anti-cracking steel bar fixed at the top in the gap, the upper part of the structural joint and a limit gap groove on the top surface of wet joint concrete, and fixing the tensile pressing steel plate on the embedded anchoring steel bar by using an anchoring bolt;
8) C50 steel fiber concrete is filled in the limit notch groove.
The invention has the following positive and beneficial effects: the steel members are arranged at the upper edge and the lower edge of the beam end at the continuous position to limit the displacement (longitudinal and corner displacement) of the beam end, so that the common reinforced concrete bridge deck at the continuous position is in a small-strain working state, further the crack generation and development at the continuous position can be controlled or delayed, the continuous service life of the bridge deck is prolonged, and the total engineering cost is reduced.
In particular, the following five advantages can be obtained:
1) The tensile compression limiting steel plate is arranged at the upper edge of the continuous end of the simply supported beam, so that the negative bending moment generated by live load can be borne, the corner and the longitudinal displacement of the beam end can be limited, and the steel plate can be used as a template for pouring bridge deck continuous concrete;
2) The tensile limiting steel plate is fixed on the embedded anchoring steel bar through bolts, so that the construction is simple and convenient, the connection is firm and reliable, the tensile limiting steel plate can be replaced, and the replacement in the operation process is also convenient;
3) The annular anti-cracking steel bars are welded on the tensile steel plates, so that the strength is high, the anti-cracking capacity is high, the construction is convenient, and the later maintenance is easy to operate;
4) The tensile pressure limiting device is arranged at the lower edge of the continuous end of the simply supported beam, so that the pressure generated by live load and temperature rise and the tensile force generated by temperature, shrinkage and creep can be counteracted, and the purposes of limiting the corner and longitudinal displacement of the beam end are achieved;
5) The bottom tensile compression limiting device consists of three parts of an end beam embedded steel cylinder, a steel sleeve and a rear penetrating steel pipe, and the structure is easy to replace.
Drawings
FIG. 1 is a schematic diagram of a cross-sectional structure of a bridge of the present invention;
FIG. 2 is a schematic view of a bridge vertical section structure of the present invention;
FIG. 3 is a schematic view of a bridge deck continuous construction forward-vertical section structure of the present invention;
FIG. 4 is a schematic cross-sectional view of a deck continuous construction of the present invention;
FIG. 5 is a schematic illustration of a forward-looking structural view of the deck continuous construction of the present invention;
FIG. 6 is a front view of an end beam embedded steel cylinder of the present invention;
FIG. 7 is a left side view of the end beam embedded steel cylinder of the present invention;
FIG. 8 is a cross-sectional view of the steel bushing of the present invention;
FIG. 9 is a left side view of the steel bushing of the present invention;
fig. 10 is a front view of the tension-compression steel pipe of the present invention;
fig. 11 is a left side view of the tension-compression steel pipe of the present invention.
Figure number: the concrete bridge comprises a main beam, a prefabricated end beam, a 3-cast-in-situ end beam, a 4-wet joint, a 5-structural joint, a 6-top end limiting device, a 61-tensile steel plate, a 62-anti-cracking steel bar, a 63-anchoring steel bar, a 7-bottom end limiting device, a 71-tensile steel tube, a 72-pre-buried steel cylinder, a 721-flange, a 73-steel sleeve, a 74-stiffening rib, an 8-limiting notch groove, a 9-support, a 101-anti-collision guardrail, a 102-concrete bridge deck pavement and a 103-asphalt pavement.
Detailed Description
The following describes the embodiments of the present invention further with reference to the drawings.
The following examples are given for the purpose of illustration only and are not intended to limit the embodiments of the invention. Various other changes and modifications may be made by one of ordinary skill in the art in light of the following description, and such obvious changes and modifications are contemplated as falling within the spirit of the present invention.
Referring to fig. 1 and 2, a bridge deck continuous structure suitable for a simply supported girder bridge comprises a simply supported girder, wherein the simply supported girder comprises a main girder 1 and prefabricated end cross beams 2 at two sides of the girder end of the main girder 1, the simply supported girder is arranged in one or a plurality of side by side, a cast-in-situ end cross beam 3 and a wet joint 4 are arranged between the simply supported girders to connect the simply supported girder into an integral bridge in the bridge width direction; the bridge is formed by integrating multiple sections in pairs in the length direction of the bridge, a structural seam 5 is reserved between the butted bridges, a bridge deck continuous structure is arranged at the structural seam 5, the bridge deck continuous structure comprises a top end limiting device 6 and a bottom end limiting device 7,
referring to fig. 3, the upper corners of the butt joint sides of the two butt joint simply supported beams are symmetrically provided with limit notch grooves 8 which are parallel to the structural joint 5 and span the bridge width and are open on the upper surface and the opposite surface, and are communicated with the middle structural joint 5; the top surface of the concrete in the wet joint 4 is flush with the bottom surface of the limit notch groove 8;
referring to fig. 3, 4 and 5, the top end limiting device 6 includes a tensile steel plate 61, the tensile steel plate 61 is fixed at the bottoms of two adjacent limiting notch grooves 8 along the bridge width by an anchor steel bar 63 and covers the structural joint 5, and a plurality of anti-cracking steel bars 62 are fixed on the top surface of the tensile steel plate 61 side by side along the bridge length direction; the anchoring steel bars 63 are symmetrically distributed at two ends of the structural joint 5; pouring concrete on the tensile steel plates 61, filling the limit notch grooves 8 and trowelling the upper parts of the structural joints 5;
referring to fig. 4, the bottom end stop 7 includes a tension-compression steel pipe 71; the prefabricated end cross beams 2 at two ends of the structural joint 5 are internally provided with embedded steel cylinders 72 along the length direction of the bridge, steel sleeves 73 which are coaxial with the embedded steel cylinders 72 and have equal diameters are fixed between the adjacent embedded steel cylinders 72, and the tensile compression steel pipes 71 are sleeved in the adjacent embedded steel cylinders 72 and the adjacent steel sleeves 73 for fixation.
Two ends of the tensile compression steel pipe 71 respectively penetrate through embedded steel cylinders 72 in the two prefabricated end cross beams 2, and stiffening ribs 74 are arranged at the end parts; stiffening ribs 74 are provided at both ends of the steel sleeve 73.
Referring to fig. 3, 6 and 7, a ring-shaped flange 721 is arranged at both ends of the embedded steel cylinder 72, and the outer end surface of the flange 721 is clung and parallel to the outer side surface of the precast end beam 2; referring to fig. 3 and 8-11, the stiffening ribs 74 at both ends of the steel tube 71 and the steel sleeve 73 are welded and fixed to the flange 721 of the embedded steel cylinder 72.
Referring to fig. 3, the anti-crack steel bar 62 is a rectangular ring-shaped closed steel bar, and includes a pair of vertical bars and a pair of horizontal bars, and the horizontal bars at the bottom are welded and fixed on both sides of the tensile steel plate 61.
Referring to fig. 3, the anchoring bar 63 is U-shaped and includes a pair of vertical bars and a horizontal bar at the bottom, the horizontal bar is embedded in the bridge, and the top end of the vertical bar passes through the tension-compression steel plate 61; the tensile steel plates 61 are connected with the top ends of the anchoring steel bars 63 through the anchoring bolts in a threaded mode and are anchored in the limiting notch grooves 8.
A construction method suitable for bridge deck continuous construction of a simply supported girder bridge comprises the following steps:
1) Prefabricating a simply supported beam: a gap is reserved at the upper part of the butt joint end of the simply supported beam, an anchor bar 63 is embedded in the gap, and an embedded steel cylinder 72 is arranged in the prefabricated end cross beam 2 of the butt joint end of the simply supported beam;
2) The simple supporting beams are arranged on the bridge site and are erected on the support 9; the simply supported beams are butted in the bridge length direction to form a structural joint 5;
3) Constructing a cast-in-situ end cross beam 3 and a cast-in-situ wet joint 4 among the simply supported beams, and connecting the simply supported beams into an integral bridge in the width direction;
4) Constructing anti-collision guardrails 101 on two sides of a bridge, a concrete bridge deck pavement layer 102 on the upper part of the bridge and an asphalt pavement layer 103;
5) A steel sleeve 73 is fixed between the pre-embedded steel cylinders 72 in the two precast end cross beams 2 at the two ends of the structural joint 5, and the tensile compression steel pipe 71 passes through the pre-embedded steel cylinders 72 at the two ends of the structural joint 5 and the middle steel sleeve 73 and is welded and fixed; the two end parts of the tensile compression steel pipe 71 extend out of the embedded steel cylinder 72;
6) Stiffening ribs 74 are arranged at two end parts of the tensile compression steel pipe 71, stiffening ribs 74 are arranged at two ends of the steel sleeve 73, and the stiffening ribs 74 at each position are respectively welded and fixed with flanges 721 at the end parts of the embedded steel cylinder 72 at corresponding positions;
7) A tensile steel plate 61 with an annular anti-cracking steel bar 62 fixed at the top is placed in the gap, the upper part of the structural joint 5 and a limit gap groove 8 on the concrete top surface of the wet joint 4, and is fixed on an embedded anchor steel bar 63 by an anchor bolt;
8) C50 steel fiber concrete is filled in the limit notch groove 8.
Examples
The invention relates to a continuous structural design of a bridge deck of a simply supported girder bridge, which takes a simply supported small box girder bridge as an example.
The bridge deck continuous construction steps of the invention are as follows:
1) Prefabricating a simply supported beam in a factory, reserving a 5cm deep notch at the upper edge of the continuous end of the simply supported beam, pre-burying an anchor bar 63, pre-burying a steel cylinder 72 in a beam 2 at the prefabrication end, wherein the inner diameter is 304mm, and the wall thickness is 10mm;
2) Transporting the simply supported beams to the bridge site and erecting the main beams 1 on the supports 9;
3) A cast-in-situ wet joint 4 between the construction main beams 1 and the cast-in-situ end cross beam 5 are constructed;
4) Constructing an anti-collision guardrail 101, a 10cm concrete bridge deck pavement layer 102 and a 10cm asphalt pavement layer 103;
5) Placing a tensile compression steel pipe 71 (without stiffening ribs 74) through the two prefabricated end beams 2 and the middle steel sleeve 73;
6) The steel pipe stiffening rib 74 is penetrated after welding, and the stiffening rib 74 is welded with a flange 721 at the end part of the pre-embedded steel cylinder 72 in the precast end cross beam 2;
7) Placing a tensile steel plate 61 (an annular anti-cracking steel bar 32 is welded on the top of the tensile steel plate 61 in advance) in the gap, the upper part of the structural joint 5 and the limit gap groove 8 on the concrete top surface of the wet joint 4, and fixing the tensile steel plate on the embedded anchor steel bar 63 by bolts;
8) And the limit notch groove 8 is filled with C50 steel fiber concrete.
Claims (6)
1. The bridge deck continuous structure suitable for the simply supported girder bridge comprises simply supported girders, wherein the simply supported girders comprise main girders (1) and prefabricated end cross girders (2) at two sides of the girder ends of the main girders (1), the simply supported girders are arranged in one or a plurality of side by side, cast-in-place end cross girders (3) and wet joints (4) are arranged between the simply supported girders to connect the simply supported girders into an integral bridge in the bridge width direction; the bridge is formed by integrating multiple sections in pairs in the length direction of the bridge, a structural seam (5) is reserved between the butted bridges, and a bridge deck continuous structure is arranged at the structural seam (5), which is characterized in that the bridge deck continuous structure comprises a top end limiting device (6) and a bottom end limiting device (7),
limiting notch grooves (8) which are parallel to the structural slits (5) and transversely span the bridge width and are opened on the upper surface and the opposite surface are symmetrically arranged at the upper corners of the butt joint sides of the two butted simply supported beams and are communicated with the middle structural slits (5); the top surface of the concrete in the wet joint (4) is flush with the bottom surface of the limit notch groove (8);
the top end limiting device (6) comprises a tensile steel plate (61), the tensile steel plate (61) is fixed at the bottoms of two adjacent limiting notch grooves (8) along the bridge width through anchoring steel bars (63) and covers the structural joint (5), and a plurality of anti-cracking steel bars (62) are fixed on the top surface of the tensile steel plate (61) side by side along the bridge length direction; the anchoring steel bars (63) are symmetrically distributed at two ends of the structural joint (5); concrete is poured on the tensile steel plates (61) and fills the limit notch grooves (8) and the upper parts of the structural joints (5) are smoothed;
the bottom end limiting device (7) comprises a tensile steel pipe (71); the prefabricated end cross beams (2) at two ends of the structural joint (5) are internally provided with embedded steel cylinders (72) along the length direction of the bridge, steel sleeves (73) which are coaxial with the embedded steel cylinders (72) and have equal diameters are fixed between the adjacent embedded steel cylinders (72), and the tensile compression steel pipes (71) are sleeved in the adjacent embedded steel cylinders (72) and the adjacent steel sleeves (73) to be fixed.
2. A deck continuous construction suitable for simply supported girder bridge according to claim 1, characterized in that both ends of said tension-compression steel pipe (71) are respectively penetrated out of pre-buried steel cylinders (72) in both said prefabricated end cross beams (2), and stiffening ribs (74) are provided at the ends; stiffening ribs (74) are arranged at two ends of the steel sleeve (73).
3. A bridge deck continuous construction suitable for simply supported girder bridge as claimed in claim 2, characterized in that a circle of annular flanges (721) are arranged at both ends of the embedded steel cylinder (72), and the outer end surfaces of the flanges (721) are clung and parallel to the outer side surfaces of the prefabricated end cross beams (2); the stiffening ribs (74) at the two ends of the tensile compression steel pipe (71) and the steel sleeve (73) are respectively welded and fixed with the flange (721) of the embedded steel cylinder (72).
4. A deck continuous construction suitable for use in a simply supported girder bridge as claimed in claim 1, wherein said anti-crack reinforcing bars (62) are rectangular ring-shaped closed reinforcing bars comprising a pair of vertical bars and a pair of horizontal bars, and said horizontal bars at the bottom are welded and fixed to both sides of said tension-compression steel plate (61).
5. A deck continuous construction suitable for use in a simply supported girder bridge as claimed in claim 1, wherein said anchor bars (63) are U-shaped and comprise a pair of vertical bars and a horizontal bar at the bottom, said horizontal bar being buried in the bridge, the top ends of said vertical bars passing through said tension-compression steel plates (61); the tensile steel plates (61) are connected with the top ends of the anchoring steel bars (63) through the anchoring bolts in a threaded mode and are anchored in the limiting notch grooves (8).
6. The construction method suitable for bridge deck continuous construction of the simply supported girder bridge is characterized by comprising the following steps of:
1) Prefabricating a simply supported beam: a gap is reserved at the upper part of the butt joint end of the simply supported beam, an anchor bar (63) is embedded in the gap, and an embedded steel cylinder (72) is arranged in a prefabricated end cross beam (2) of the butt joint end of the simply supported beam;
2) The simple supporting beams are arranged on the bridge site and are erected on the support (9); the simply supported beams are butted in the bridge length direction to form a structural joint (5);
3) Constructing a cast-in-situ end cross beam (3) among the simply supported beams and connecting the simply supported beams into an integral bridge in the width direction by a cast-in-situ wet joint (4);
4) Constructing anti-collision guardrails (101) on two sides of a bridge and a concrete bridge deck pavement layer (102) and an asphalt pavement layer (103) on the upper part of the bridge;
5) A steel sleeve (73) is fixed between the pre-buried steel cylinders (72) in the two precast end cross beams (2) at the two ends of the structural joint (5), and the tensile compression steel pipes (71) penetrate through the pre-buried steel cylinders (72) at the two ends of the structural joint (5) and the middle steel sleeve (73) and are welded and fixed; the two end parts of the tensile compression steel pipe (71) extend out of the embedded steel cylinder (72);
6) Stiffening ribs (74) are arranged at two ends of the tensile compression steel pipe (71), the stiffening ribs (74) are arranged at two ends of the steel sleeve (73), and the stiffening ribs (74) at all positions are welded and fixed with flanges (721) at the ends of the embedded steel cylinder (72) at corresponding positions respectively;
7) A tensile steel plate (61) with an annular anti-cracking steel bar (62) fixed at the top is placed in the gap, the upper part of the structural joint (5) and a limit gap groove (8) on the top surface of the wet joint (4) concrete, and is fixed on the embedded anchor steel bar (63) by an anchor bolt;
8) C50 steel fiber concrete is filled in the limit notch groove (8).
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| CN201910484734.4A CN110055881B (en) | 2019-06-05 | 2019-06-05 | Bridge deck continuous construction and construction method suitable for simply supported girder bridge |
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| CN201910484734.4A CN110055881B (en) | 2019-06-05 | 2019-06-05 | Bridge deck continuous construction and construction method suitable for simply supported girder bridge |
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| CN110055881A CN110055881A (en) | 2019-07-26 |
| CN110055881B true CN110055881B (en) | 2023-11-21 |
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