CN114837069A - Pier beam consolidation structure of steel box girder bridge and construction method thereof - Google Patents
Pier beam consolidation structure of steel box girder bridge and construction method thereof Download PDFInfo
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- CN114837069A CN114837069A CN202210447922.1A CN202210447922A CN114837069A CN 114837069 A CN114837069 A CN 114837069A CN 202210447922 A CN202210447922 A CN 202210447922A CN 114837069 A CN114837069 A CN 114837069A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 462
- 239000010959 steel Substances 0.000 title claims abstract description 462
- 238000007596 consolidation process Methods 0.000 title claims abstract description 39
- 238000010276 construction Methods 0.000 title claims abstract description 21
- 238000003466 welding Methods 0.000 claims abstract description 82
- 238000009434 installation Methods 0.000 claims abstract description 5
- 238000005192 partition Methods 0.000 claims description 12
- 230000002093 peripheral effect Effects 0.000 claims description 7
- 238000005086 pumping Methods 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 7
- 230000005540 biological transmission Effects 0.000 abstract description 4
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 3
- 238000005266 casting Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 230000002277 temperature effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009415 formwork Methods 0.000 description 1
- 238000009417 prefabrication Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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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
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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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- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/60—Planning or developing urban green infrastructure
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- Engineering & Computer Science (AREA)
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- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention relates to a pier beam consolidation structure of a steel box girder bridge and a construction method thereof, belonging to the technical field of bridge engineering. According to the invention, the prefabricated steel structure comprising the core steel cylinder, the pier top steel plate and the steel box girder is manufactured in a factory in advance, and the mode of on-site integral transportation and installation is adopted, so that on-site large-range overhead welding is avoided, the construction quality is better satisfied, the force transmission effect is better, and the integral structure is more stable.
Description
Technical Field
The invention belongs to the technical field of bridge engineering, and relates to a pier beam consolidation structure of a steel box girder bridge and a construction method thereof.
Background
In the urban bridge, the influence of construction on traffic is reduced as much as possible, the upper structure is usually a steel box girder, but the steel structure is sensitive to temperature, and under the action of a temperature effect, the situation of the separation of a transverse support is often caused, so that the design of a consolidation pier is often adopted in the steel bridge. The traditional steel box girder bridge pier girder consolidation structure comprises a steel column, a steel box girder connected to the steel column and concrete poured in the steel box girder and the steel column; the construction steps are as follows: firstly, fixing a steel column at the installation position of a pier, then hoisting a steel box girder to the steel column, carrying out on-site welding, and pouring concrete after the welding is finished. The traditional steel box girder bridge pier beam consolidation structure has the following problems:
1. because the traditional steel box girder bridge pier girder consolidation structure adopts a mode of filling concrete in a steel pipe, the tight connection between the concrete and a steel column cannot be ensured, and the connection at the pier girder combining part is unreliable; on the other hand, the steel tube is filled with concrete, so that the pier has high rigidity and high distributed stress, but the concrete parts in the steel column and the steel box girder cannot effectively share the stress, and finally the steel column bears the high stress and the stress is unreasonable, so that the large steel column is required to bear the stress, and the economical efficiency is poor.
2. Steel column and steel box girder bottom adopt the welding seam to carry out the on-the-spot welding continuously usually among traditional steel box girder bridge pier concreties the structure, because the stress that the steel column shared is very big, make the stress of welding seam also very big, the design height that causes the fillet weld is very high, still need adopt groove weld sometimes, but steel column and steel box girder's welding all welds at the scene among traditional steel box girder bridge pier concreties the structure, because carry out on-the-spot overhead welding on a large scale, make the construction quality of welding seam hardly guarantee, lead to steel box girder bridge pier concreties the structure and has certain potential safety hazard.
Disclosure of Invention
In view of the above, the present invention provides a pier-girder consolidation structure of a steel box girder bridge and a construction method thereof, which adopts a prefabricated steel structure in a factory and a pier-girder consolidation structure of binding and pouring concrete pier studs on site to solve the above problems.
In order to achieve the purpose, the invention provides the following technical scheme:
on one hand, the invention provides a pier beam consolidation structure of a steel box girder bridge, which comprises a concrete pier column, a core steel cylinder embedded in the concrete pier column, a steel box girder installed on the concrete pier column and a pier top steel plate installed on the concrete pier column and close to one side of the steel box girder, wherein the steel box girder comprises a steel box girder bottom plate, a steel box girder top plate and a steel box girder web plate for connecting the steel box girder bottom plate and the steel box girder top plate;
the core steel cylinder penetrates through the pier top steel plate and the steel box girder bottom plate to the steel box girder top plate, and is fixedly connected with the pier top steel plate, the steel box girder bottom plate and the steel box girder top plate;
concrete is filled in the core steel cylinder, the steel box girder and the concrete pier stud, and a plurality of welding nails are arranged on the outer side of the core steel cylinder to enhance the connection stability of the core steel cylinder and the concrete;
the pier top steel plate is connected with the concrete pier column through a shear key embedded in the concrete pier column, and the pier top steel plate is fixedly connected with the steel box girder bottom plate.
In some embodiments of the present disclosure, a plurality of longitudinal stiffening ribs arranged along the bridge direction of the steel box girder bridge are uniformly arranged on one side of the steel box girder bottom plate and one side of the steel box girder top plate facing the inside of the steel box girder.
In some embodiments of the present disclosure, a stiffening diaphragm plate is arranged in the steel box girder along the steel box girder bridge cross bridge direction, and the stiffening diaphragm plate is respectively connected with the steel box girder bottom plate, the steel box girder web plate and the steel box girder top plate in a welding manner.
In some embodiments of the present disclosure, the stiffening diaphragms include a central stiffening diaphragm and two-side stiffening diaphragms, the central stiffening diaphragm is located to match the core steel cylinder and is connected to the core steel cylinder by welding, and the two-side stiffening diaphragms are located on two sides of the core steel cylinder to form a concrete casting cavity bounded by a steel box girder web and the two-side stiffening diaphragms.
In some embodiments of the present disclosure, a longitudinal stiffening rib plate is arranged in the steel box girder along the bridge direction of the steel box girder bridge, and the longitudinal stiffening rib plate is respectively connected to the two-side stiffening diaphragms and the steel box girder bottom plate in a welding manner.
In some embodiments of the present disclosure, the longitudinal stiffening rib plates include a central longitudinal stiffening rib plate and two side longitudinal stiffening rib plates, the height of the central longitudinal stiffening rib plate is consistent with the height of the steel box girder, and is connected with the top plate of the steel box girder and the core steel cylinder by welding, the two side longitudinal stiffening rib plates are installed on two sides of the core steel cylinder, and are connected with the central stiffening diaphragm plate by welding, and the height of the two side longitudinal stiffening rib plates is less than the height of the steel box girder so as to ensure that a concrete pumping pipe in the steel box girder passes through.
On the other hand, the invention also provides a construction method of the pier beam consolidation structure of the steel box girder bridge, which comprises the following steps:
s1: manufacturing each part of the pier beam consolidation structure in a factory, welding the shear key on one side of the pier top steel plate far away from the steel box beam, enabling the core steel cylinder to penetrate through the pier top steel plate and the steel box beam bottom plate to reach the steel box beam top plate, welding and connecting the core steel cylinder with the pier top steel plate, the steel box beam bottom plate and the steel box beam top plate, welding and connecting the steel box beam web plate with the steel box beam bottom plate and the steel box beam top plate, and welding the welding nails on the outer side of the core steel cylinder to obtain a prefabricated steel structure;
s2: temporary buttresses are arranged on two sides of the concrete pier column mounting position along the bridge direction of the steel box girder bridge, and the prefabricated steel structure is transported to the site and then positioned and supported through the temporary buttresses.
S3: and binding the steel bars of the concrete pier stud, setting up a peripheral template after the binding is finished, and pouring concrete of the concrete pier stud, the steel box girder and the core steel cylinder after the template is set up, so that the construction is finished.
In some embodiments of the present disclosure, after the tied steel bar is welded to the pier top steel plate near one end of the pier top steel plate in step S3, a peripheral formwork is set up.
In some embodiments of the present disclosure, in step S1, the steel box girder further includes a central stiffening bulkhead and two side stiffening bulkheads disposed in the steel box girder along the steel box girder bridge cross-bridge direction, the central stiffening bulkhead is located to match the core steel cylinder, and the two side stiffening bulkheads are located at two sides of the core steel cylinder to form a concrete casting cavity bounded by the steel box girder web and the two side stiffening bulkheads.
Center diaphragm and both sides diaphragm of putting more energy into all link to each other with steel box girder bottom plate, steel box girder web and the welding of steel box girder roof board, just the core steel cylinder with the diaphragm welding of putting more energy into in center links to each other.
After the core steel cylinder is welded with the pier top steel plate, the steel box girder bottom plate and the steel box girder top plate, the central stiffening diaphragm plate and the two side stiffening diaphragm plates are welded, and then the welding nails are welded.
In some embodiments of the present disclosure, in step S1, the steel box girder further includes a central longitudinal stiffening rib plate and two side longitudinal stiffening rib plates disposed along the bridge direction in the steel box girder bridge, and the central longitudinal stiffening rib plate and the two side longitudinal stiffening rib plates are both connected to the two side stiffening diaphragms and the steel box girder bottom plate by welding.
The height of the central longitudinal stiffening rib plate is consistent with the height of the steel box girder, and is connected with the steel box girder top plate and the core steel cylinder in a welding mode, the longitudinal stiffening rib plates on two sides are installed on two sides of the core steel cylinder, the longitudinal stiffening rib plates on two sides are connected with the central reinforcing diaphragm plate in a welding mode, and the height of the longitudinal stiffening rib plates is smaller than that of the steel box girder so as to ensure that a concrete pumping pipe in the steel box girder passes through.
And the welding of the central longitudinal stiffening rib plate and the longitudinal stiffening rib plates at the two sides and the welding of the central stiffening diaphragm plate and the stiffening diaphragm plates at the two sides are carried out simultaneously.
In some embodiments of the present disclosure, the concrete pouring cavity of the steel box girder and the concrete in the concrete pier are both made of C40 micro-expansive concrete.
The invention has the beneficial effects that:
1. the invention is characterized in that the core steel cylinder is pre-embedded in the concrete pier stud and passes through the pier top steel plate and the steel box girder bottom plate to reach the steel box girder top plate, and the core steel cylinder is respectively connected with the pier top steel plate, the steel box girder bottom plate and the steel box girder top plate in a welding way by adopting a slit welding seam, the core steel cylinder is connected with the central stiffening diaphragm plate and the central longitudinal stiffening rib plate which are arranged in the steel box girder by adopting a split welding seam to further strengthen the connection stability of the core steel cylinder and the steel box girder, and the close connection between the core steel cylinder and the steel box girder is greatly strengthened by matching with the cylindrical welding nails and the micro-expansion concrete filled in the steel box girder chamber, the core steel cylinder is embedded into the concrete pier stud, and the connection function between the core steel cylinder and the concrete pier stud is enhanced by virtue of the stress mode that the core steel cylinder and the cylindrical welding nails are wrapped in the concrete pier stud, the load effect on the upper part of the steel box girder can be effectively transmitted to the concrete pier column through the core steel cylinder; the pier top steel plate is connected with the steel box girder bottom plate through a peripheral welding line, a large number of shear force keys at the bottom of the pier top steel plate are pre-embedded inside the concrete pier stud, and the top of the steel bars bound in the concrete pier stud is welded with the pier top steel plate, so that the pier top steel plate becomes another effective way for transmitting the load effect at the upper part of the steel box girder to the concrete pier stud.
2. Compared with the common pier beam consolidation structure which is constructed by constructing pier columns and erecting upper steel box beams, the construction method of the pier beam consolidation structure of the steel box beam bridge provided by the invention has the advantages that the prefabricated steel structure comprising the core steel cylinder, the pier top steel plate and the steel box beams is manufactured in a factory in advance, and the whole operation and installation mode is carried out on site, so that the site large-range overhead welding is avoided, the construction quality is better satisfied, and the safety is better.
3. Compared with the common steel pipe consolidation piers, the concrete pier column wrapped core steel cylinders are adopted, and the concrete pier column can be in various appearance forms, so that the overall attractiveness of the bridge can be further improved.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and combinations particularly pointed out hereinafter.
Drawings
For the purposes of promoting a better understanding of the objects, aspects and advantages of the invention, reference will now be made to the following detailed description taken in conjunction with the accompanying drawings in which:
FIG. 1 is a schematic overall structure diagram of a pier beam consolidation structure of a steel box girder bridge;
FIG. 2 is a plan view of the steel box girder top plate of the pier beam consolidation structure of the steel box girder bridge and the relative relationship with the core steel cylinder;
FIG. 3 is a plan view of a steel box girder bottom plate of a pier beam consolidation structure of a steel box girder bridge and a relative relationship with a core steel cylinder and a pier top steel plate;
FIG. 4 is a first schematic sectional view of a pier-girder consolidation structure of a steel box girder bridge;
fig. 5 is a schematic sectional structure view of a pier-beam consolidation structure of a steel box girder bridge.
Reference numerals: 1-core steel cylinder, 2-cylindrical welding nail, 3-pier top steel plate, 4-steel box girder bottom plate, 5-steel box girder web plate, 6-steel box girder top plate, 7-longitudinal stiffening rib, 8-stiffening diaphragm plate, 8-1-central stiffening diaphragm plate, 8-2-two-side stiffening diaphragm plate, 9-stiffening rib plate, 9-1-central longitudinal stiffening rib plate, 9-2-two-side longitudinal stiffening rib plate, 10-concrete pier stud, 11-reserved pouring and vibrating hole, 11-1-pier top steel plate reserved pouring hole, 11-2-core steel cylinder pouring hole, 11-3-top plate pouring hole, 12-top plate reserved temporary manhole and 13-shear key.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention in a schematic way, and the features in the following embodiments and examples may be combined with each other without conflict.
Wherein the showings are for the purpose of illustrating the invention only and not for the purpose of limiting the same, and in which there is shown by way of illustration only and not in the drawings in which there is no intention to limit the invention thereto; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", etc., based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not an indication or suggestion that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes, and are not to be construed as limiting the present invention, and the specific meaning of the terms may be understood by those skilled in the art according to specific situations.
Example 1
Please refer to fig. 1 to 5, which are views of a pier beam consolidation structure of a steel box girder bridge, including a core steel cylinder 1, a concrete pier stud 10 and a steel box girder, wherein the steel box girder includes a steel box girder bottom plate 4, a steel box girder web 5 and a steel box girder top plate 6, a large number of cylindrical welding nails 2 are arranged around the core steel cylinder 1, the core steel cylinder 1 is pre-embedded in the concrete pier stud 10, a pre-embedded pier top steel plate 3 is arranged on the top of the concrete pier stud 10, and the core steel cylinder 1 passes through the pier top steel plate 3 and the steel box girder bottom plate 4 to reach the steel box girder top plate 6.
A plurality of longitudinal stiffening ribs 7 arranged along the bridge direction of the steel box girder bridge are arranged on one surfaces, facing the inside of the steel box girder, of the steel box girder bottom plate 4 and the steel box girder top plate 6, stiffening transverse partition plates 8 arranged along the bridge direction of the steel box girder bridge are arranged in the steel box girder, each stiffening transverse partition plate 8 comprises a central stiffening transverse partition plate 8-1 and two side stiffening transverse partition plates 8-2, each of the central stiffening transverse partition plate 8-1 and the two side stiffening transverse partition plates 8-2 is connected with the steel box girder bottom plate 4, the steel box girder web 5 and the steel box girder top plate 6 in a welding mode, the central stiffening transverse partition plate 8-1 is further connected with the core steel cylinder 1 in a welding mode, and the two side stiffening transverse partition plates 8-2 are located on two sides of the core steel cylinder 1 and used for forming a concrete pouring cavity with the steel box girder web 5 and the two side stiffening transverse partition plates 8-2 as boundaries; the steel box girder is internally provided with longitudinal stiffening rib plates 9 arranged along the steel box girder bridge along the bridge direction, each longitudinal stiffening rib plate 9 comprises a central longitudinal stiffening rib plate 9-1 and two side longitudinal stiffening rib plates 9-2, the height of each central longitudinal stiffening rib plate 9-1 is consistent with that of the steel box girder and is respectively connected with the steel box girder bottom plate 4, the steel box girder top plate 6, the two side stiffening diaphragms 8-2 and the core steel cylinder 1 in a welding mode, the two side longitudinal stiffening rib plates 9-2 are connected with the steel box girder bottom plate 4, the central stiffening diaphragm plate 8-1 and the two side stiffening diaphragms 8-2 in a welding mode, and the height of each longitudinal stiffening rib plate is smaller than that of the steel box girder so as to ensure that a concrete pump in the steel box girder passes through a delivery pipe.
A large number of shear keys 13 are arranged between the pier top steel plate 3 and the concrete pier stud 10, the pier top steel plate 3 and the steel box girder bottom plate 4 are connected through fillet welds, and the core steel cylinder 1 is connected with the steel box girder top plate 6, the steel box girder bottom plate 4 and the pier top steel plate 3 through a slit weld.
The core steel cylinder 1 is rectangular in shape and formed by welding steel plates, and is further provided with a reserved pouring and vibrating hole 11 in the embodiment, wherein the reserved pouring hole 11 comprises a pier top steel plate reserved pouring hole 11-1 arranged on a steel box girder bottom plate 4 and a pier top steel plate 3, a core steel cylinder pouring hole 11-2 arranged on a steel box girder top plate 6 and corresponding to the core steel cylinder 1, and a top plate pouring hole 11-3 arranged on the steel box girder top plate 6 and corresponding to a concrete pouring chamber, the pier top steel plate reserved pouring hole 11-1 is used for concrete pouring and vibrating of the pier stud concrete pier 10, the core steel cylinder pouring hole 11-2 is used for concrete pouring and vibrating of the interior of the core steel cylinder 1 and the concrete pier stud 10, and the top plate pouring hole 11-3 is used for concrete pouring and vibrating of the interior of the steel box girder box chamber; in the embodiment, a top plate reserved temporary manhole 12 is further arranged on the top plate 6 of the steel box girder and is used for welding the cylindrical welding nails 2, the bottom plate 4 of the steel box girder, the top plate 6 of the steel box girder, the central stiffening diaphragm 8-1 and the central longitudinal stiffening rib plate 9-1 in the steel box girder with the core steel cylinder 1, and the top plate reserved temporary manhole can also be used for concrete pouring and vibrating holes of the steel box girder; in the embodiment, all exposed steel structure components are subjected to anticorrosion and antirust treatment. Arranging temporary buttresses on site, wherein the positions of the temporary buttresses correspond to the positions of the stiffening transverse clapboards 8-2 on the two sides; the shear key 13 arranged on the pier top steel plate 3, the cylindrical welding nails 2 arranged around the core steel cylinder 1 are matched with the arrangement of the concrete pier stud 10 steel bars.
Specifically, the total width of the bridge deck of the steel box girder is 5700mm, wherein the width b1 of the box chamber is 3300mm, the width b2 of flanges at two sides is 1200mm, and the height of the steel box girder is 1700 mm; the steel box girder bottom plate 4, the steel box girder web 5, the steel box girder top plate 6, the stiffening transverse partition plate 8 and the stiffening rib plate 9 are all made of steel plates with the thickness of 20mm, and the longitudinal stiffening rib 7 is made of steel plates with the thickness of 16 mm; the length L of the steel box girder manufacturing segment is 4500mmm, the longitudinal length of the steel box girder bottom plate 4 is 4500mm consistent with the length of the segment, the longitudinal length of the steel box girder top plate 6 is 35000mm, the length of the longitudinal stiffening rib 7 is 4000mm, and the steel box girder web 5 is of a Z-shaped steel structure. Due to the fact that the width of the bridge deck is large, transportation conditions are combined, and when the steel box girder top plate is prefabricated in a factory, the width of the b2-100mm of the outer side of the flange of the steel box girder top plate 6 is processed in the factory and then is transported to the site to be spliced.
The concrete pier column 10 is shaped as a vase pier, the bottom section size is a rectangle with the radius of 100mm round chamfer of which the transverse bridge direction is 1400mm multiplied by the longitudinal bridge direction is 1100mm, and the range of the pier top 2500mm gradually changes to a rectangle with the radius of 100mm round chamfer of which the transverse bridge direction is 3000mm multiplied by the longitudinal bridge direction is 1100 mm.
The length of the core steel cylinder 1 embedded in the concrete pier stud 10 is 2500mm, and the top of the core steel cylinder extends to the steel box girder top plate 6; the core steel cylinder 1 is formed by processing a 20mm thick steel plate, and the external dimension is a rectangle with the transverse bridge direction 500mm multiplied by the longitudinal bridge direction 400 mm; a large amount of cylindrical welding nails 2 are arranged around the core steel cylinder 1, the horizontal spacing of the cylindrical welding nails 2 is 100mm, and the vertical spacing is 200 mm.
The pier top steel plate 3 is a 20mm thick steel plate, the plane size is consistent with the size of the top of the concrete pier column 10, rectangular holes with the size of 500mm in the transverse bridge direction and 400mm in the longitudinal bridge direction are formed in the center of the pier top steel plate 3 and the steel box girder bottom plate 4, the size of the rectangular holes is equal to the size of the core steel cylinder 1 in the transverse bridge direction, the longitudinal bridge direction is equal to the size of the longitudinal bridge direction, a cut is formed in the periphery of the hole, and the cut is welded with the core steel cylinder 1; and peripheral fillet weld welding is adopted between the pier top steel plate 3 and the steel box girder bottom plate 4.
The periphery of the bottom surface of the pier top steel plate 3 is provided with a large number of shear keys 13, the shear keys 13 are bent into a U shape with hooks at the end parts by adopting reinforcing steel bars with the total length of 800mm and the diameter of 20mm, the shear keys 13 and the pier top steel plate 3 are subjected to double-side welding, and the welding length is 100 mm.
The top of the core steel cylinder 1 is provided with a groove, the groove is welded with the steel box girder top plate 4, the central stiffening diaphragm 8-1 and the central stiffening rib plate 9-1 are provided with grooves, and the groove is welded with the core steel cylinder 1.
The reserved pouring hole 11-1 of the pier top steel plate is a round end rectangle, and the width is 200mm and the length is 300 mm; a core steel cylinder pouring hole 11-2 adopts a circular hole with the diameter of 200mm, and a top plate pouring hole 11-3 adopts a circular hole with the diameter of 150 mm; the temporary manhole 12 reserved on the top plate adopts a cross-bridge direction 300mm multiplied by a longitudinal bridge direction 400mm rectangle with a round chamfer with the radius of 100mm, and the size of the hole is reduced as much as possible under the condition that workers can pass through the temporary manhole.
The concrete pier column 10 and the box chamber are filled with C40 micro-expansion concrete.
The specific construction method of the embodiment comprises the following steps:
firstly, processing a steel box girder bottom plate 4, a steel box girder web plate 5, a steel box girder top plate 6, a longitudinal stiffening rib 7, a stiffening diaphragm plate 8, a stiffening rib plate 9, a core steel cylinder 1 and a pier top steel plate 2 according to a pre-designed size and a large-scale drawing, wherein the lengths of the steel box girder top plate 6, the longitudinal stiffening rib 7 arranged on the steel box girder bottom plate 4 and the steel box girder bottom plate 4 are different, so that when the steel box girder segment is assembled with a subsequent adjacent steel box girder segment, the joints of the longitudinal stiffening rib 7, the steel box girder bottom plate 4 and the steel box girder top plate 6 are not in the same position, and the strength of the joint of the steel box girder bridge segment is guaranteed;
secondly, connecting the pier top steel plate 3 and the shear key 13 by adopting a split weld, and carrying out fillet weld connection on the pier top steel plate 3 and the steel box girder bottom plate 4 to form a part BJ 1;
thirdly, vertically fixing the manufactured core steel cylinder 1 through a factory forming die, enabling a part BJ1 to penetrate through the core steel cylinder 1 through an opening with the same overall dimension as that of the core steel cylinder 1, namely a pier top steel plate 3, a steel box girder bottom plate 4 and the core steel cylinder 1, and enabling a BJ1 and the core steel cylinder 1 to be connected through a split welding seam to form a part BJ 2;
fourthly, on the basis of BJ2, welding a steel box girder web 5, a longitudinal stiffening rib 7, a stiffening diaphragm plate 8 and a stiffening rib plate 9 with a steel box girder bottom plate 4 at corresponding positions, and connecting a central stiffening diaphragm plate 8-1 and a central longitudinal stiffening rib plate 9-1 core steel cylinder 1 through a seam to form a part BJ 3;
fifthly, welding the longitudinal stiffening ribs 7 with the top plate 6 of the steel box girder to form a part BJ 4;
sixthly, turning over the BJ4, installing the part BJ3, and welding the core steel cylinder 1, the steel box girder web 5, the stiffening diaphragm plate 8 and the top of the stiffening rib plate 9 with the steel box girder top plate 6, wherein the core steel cylinder 1 is connected with the steel box girder top plate 6 by adopting a groove welding seam;
and seventhly, welding the core steel cylinder 1 and the cylindrical welding nails 2 is completed, the welding work of the cylindrical welding nails 2 in the range of the steel box girder enters and is completed through a top plate temporary manhole 12 reserved on a top plate 6 of the steel box girder, and the prefabrication work of the factory is finished and the stroke of the complete component BJ is completed.
Eighthly, arranging temporary buttresses at two sides of the pier stud position on site, wherein the positions of the temporary buttresses correspond to the stiffening diaphragm 8-2, and carrying out positioning and supporting on the complete component BJ after the complete component BJ is transported to the site;
ninth, binding reinforcing steel bars of the concrete pier stud 10 outside the complete component BJ after installation and positioning, welding one end, close to a pier top steel plate 3, of the reinforcing steel bars with a pier top steel plate 3, erecting a template after welding, performing concrete pouring and vibrating of the concrete pier stud 1 through a steel box girder top plate corresponding to a core steel cylinder pouring hole 11-2 and a pier top steel plate reserved pouring hole 11-1, enabling workers to enter the interior of the box chamber through a top plate reserved temporary manhole 12, performing concrete vibrating on the concrete pier stud 1 through the pier top steel plate reserved pouring hole 11-1, and simultaneously matching with an attached vibrator outside the template to vibrate to ensure vibrating quality;
and tenth, performing micro-expansive concrete filling and pouring on the pier top steel box girder part through the steel box girder top plate pouring hole 11-3 and the top plate reserved temporary manhole 12, and filling and pouring all reserved holes in the steel box girder top plate 1 after pouring is completed.
Example 2
The present embodiment is different from embodiment 1 in that the concrete pier 10 in the present embodiment is shaped like a rectangular parallelepiped.
The concrete pier column 10 is combined with the common steel column consolidation piers and optimized and improved, the steel column consolidation piers are replaced by the core steel cylinder 1 pre-embedded in the concrete pier column 10 in an optimized mode, the mutual relation among the core steel cylinder 1, the concrete pier column 10 and the steel box girder is strengthened through various structural measures, and the safe and firm steel box girder pier girder fixing structure is formed. Such pier beam consolidation structures contain two force transmission paths:
1) the core steel cylinder 1 is in multi-welding connection with the steel box girder bottom plate 4, the steel box girder top plate 6, the stiffening transverse partition plate 8 and the stiffening rib plate 9, and meanwhile, the core steel cylinder 1 is embedded into the concrete pier column 10 to a larger depth by matching with the cylindrical welding nails 2 and the micro-expansion concrete filled in the box chamber, and the connection between the core steel cylinder 1 and the concrete pier column 10 is enhanced by means of the stress mode that the core steel cylinder 1 and the cylindrical welding nails 2 are wrapped inside the concrete pier column 10, so that the load effect on the upper part of the steel box girder can be effectively transmitted to the concrete pier column 10 through the core steel cylinder 1;
2) pier top steel sheet 3 and steel box girder bottom plate 4 adopt peripheral welding seam to be connected, and 3 a large amount of shear force keys 13 in pier top steel sheet bottom wrap up inside concrete pier stud 10, and the reinforcing bar top of ligature is welded with pier top steel sheet 3 in the concrete pier stud 10 for pier top steel sheet 3 becomes another effective way of steel box girder upper portion load effect to concrete pier stud 10 transmission.
According to the pier beam consolidation structure of the steel box girder bridge, the force transmission effect between the steel box girder and the concrete pier column is effectively enhanced through the application of the core steel cylinder 1, on one hand, compared with a common steel column consolidation pier, the pier beam consolidation structure of the steel box girder bridge improves the stress of the pier column, and simultaneously optimizes the connection form between the steel box girder and the concrete pier column, so that the pier beam consolidation structure can more easily meet the stress requirement of the steel box girder bridge when the temperature effect is considered, and the structure is safer and more reliable; on the other hand, the construction method provided by the invention reduces a large amount of field overhead welding workload by prefabricating the steel structure in a factory, and greatly improves the construction quality and safety.
Finally, the above embodiments are only for illustrating the technical solution of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solution of the present invention without departing from the spirit and scope of the technical solution, and all shall fall within the scope of the claims of the present invention.
Claims (10)
1. The utility model provides a pier beam concreties structure of steel box girder bridge which characterized in that: the steel box girder comprises a concrete pier stud (10), a core steel cylinder (1) pre-embedded in the concrete pier stud (10), a steel box girder installed on the concrete pier stud (10) and a pier top steel plate (3) installed on the concrete pier stud (10) and close to one side of the steel box girder, wherein the steel box girder comprises a steel box girder bottom plate (4), a steel box girder top plate (6) and a steel box girder web plate (5) for connecting the steel box girder bottom plate (4) and the steel box girder top plate (6);
the core steel cylinder (1) penetrates through the pier top steel plate (3) and the steel box girder bottom plate (4) to reach the steel box girder top plate (6), and the core steel cylinder (1) is fixedly connected with the pier top steel plate (3), the steel box girder bottom plate (4) and the steel box girder top plate (6);
concrete is filled in the core steel cylinder (1), the steel box girder and the concrete pier stud (10), and a plurality of welding nails (2) are arranged on the outer side of the core steel cylinder (1) to strengthen the connection stability of the core steel cylinder (1) and the concrete;
the pier top steel plate (3) is connected with the concrete pier column (10) through a shear key (13) in the concrete pier column (10) in a pre-buried mode, and the pier top steel plate (3) is fixedly connected with the steel box girder bottom plate (4).
2. The pier beam consolidation structure of a steel box girder bridge according to claim 1, wherein: and a plurality of longitudinal stiffening ribs (7) which are arranged along the bridge direction of the steel box girder bridge are uniformly arranged on one surfaces of the steel box girder bottom plate (3) and the steel box girder top plate (6) facing the inside of the steel box girder.
3. The pier beam consolidation structure of a steel box girder bridge according to claim 1, wherein: be equipped with in the steel box girder along steel box girder bridge cross bridge to arranging stiffening bulkhead (8), stiffening bulkhead (8) link to each other with steel box girder bottom plate (4), steel box girder web (5) and steel box girder roof board (6) welding respectively.
4. The pier beam consolidation structure of a steel box girder bridge according to claim 3, wherein: the stiffening diaphragm plate (8) comprises a center stiffening diaphragm plate (8-1) and two side stiffening diaphragm plates (8-2), the position of the center stiffening diaphragm plate (8-1) is matched with the core steel cylinder (1) and is connected with the core steel cylinder (1) in a welding mode, and the two side stiffening diaphragm plates (8-2) are located on two sides of the core steel cylinder (1) and used for forming a concrete pouring cavity bounded by a steel box girder web plate (5) and the two side stiffening diaphragm plates (8-2).
5. The pier beam consolidation structure of a steel box girder bridge according to claim 4, wherein: the steel box girder is internally provided with longitudinal stiffening rib plates (9) which are arranged along the steel box girder bridge along the bridge direction, and the longitudinal stiffening rib plates (9) are respectively connected with the stiffening transverse partition plates (8-2) on the two sides and the steel box girder bottom plate (4) in a welding manner.
6. The pier beam consolidation structure of a steel box girder bridge according to claim 5, wherein: the longitudinal stiffening rib plate (9) comprises a central longitudinal stiffening rib plate (9-1) and two side longitudinal stiffening rib plates (9-2), the height of the central longitudinal stiffening rib plate (9-1) is consistent with that of the steel box girder, the central longitudinal stiffening rib plate (9-1) is connected with the steel box girder top plate (6) and the core steel cylinder (1) in a welding mode, the two side longitudinal stiffening rib plates (9-2) are installed on two sides of the core steel cylinder (1) and connected with the central stiffening diaphragm plate (8-1) in a welding mode, and the height of the longitudinal stiffening rib plate is smaller than that of the steel box girder so as to ensure that a concrete pumping pipe in the steel box girder passes through.
7. A construction method of a pier-girder consolidation structure of a steel box girder bridge according to any one of claims 1 to 6, comprising the steps of:
s1: manufacturing each part of the pier beam consolidation structure in a factory, welding the shear key (13) on one side of the pier top steel plate (3) far away from the steel box beam, enabling the core steel cylinder (1) to penetrate through the pier top steel plate (3) and the steel box beam bottom plate (4) to reach the steel box beam top plate (6) and be connected with the pier top steel plate (3), the steel box beam bottom plate (4) and the steel box beam top plate (6) in a welding mode, enabling the steel box beam web plate (5) to be connected with the steel box beam bottom plate (4) and the steel box beam top plate (6) in a welding mode, and welding the welding nails (2) on the outer side of the core steel cylinder (1) to obtain a prefabricated steel structure;
s2: temporary buttresses are arranged on two sides of the installation position of the concrete pier column (10) along the bridge direction of the steel box girder bridge, and the prefabricated steel structure is transported to the site and then positioned and supported through the temporary buttresses;
s3: and (2) binding the steel bars of the concrete pier column (10), then setting up a peripheral template after the binding is finished, and pouring concrete of the concrete pier column (10), the steel box girder and the core steel cylinder (1) after the template is set up, so that the construction is finished.
8. The construction method of the pier-girder consolidation structure of the steel box girder bridge according to claim 7, wherein: and in the step S3, after one end of the bound steel bar close to the pier top steel plate (3) is welded and connected with the pier top steel plate (3), a peripheral template is set.
9. The construction method of the pier-girder consolidation structure of the steel box girder bridge according to claim 7, wherein: in step S1, the steel box girder further includes a central stiffening bulkhead (8-1) and two side stiffening bulkheads (8-2) disposed in the steel box girder along the steel box girder bridge cross bridge direction, the position of the central stiffening bulkhead (8-1) is matched with the core steel cylinder (1), the two side stiffening bulkheads (8-2) are located on two sides of the core steel cylinder (1) and are used for forming a concrete pouring cavity bounded by a steel box girder web (5) and the two side stiffening bulkheads (8-2);
the central stiffening diaphragm plate (8-1) and the stiffening diaphragm plates (8-2) at the two sides are welded with the steel box girder bottom plate (4), the steel box girder web plate (8) and the steel box girder top plate (6), and the core steel cylinder (1) is welded with the central stiffening diaphragm plate (8-1);
after the core steel cylinder (1) is welded with the pier top steel plate (3), the steel box girder bottom plate (4) and the steel box girder top plate (6), the central stiffening diaphragm plate (8-1) and the two side stiffening diaphragm plates (8-2) are welded, and then the welding nails (2) are welded.
10. The construction method of the pier-girder consolidation structure of the steel box girder bridge according to claim 9, wherein: in step S1, the steel box girder further includes a central longitudinal stiffening rib plate (9-1) and two side longitudinal stiffening rib plates (9-2) disposed along the bridge direction in the steel box girder along the steel box girder bridge, and both the central longitudinal stiffening rib plate (9-1) and the two side longitudinal stiffening rib plates (9-2) are welded to the two side stiffening diaphragms (8-2) and the steel box girder bottom plate (4);
the height of the central longitudinal stiffening rib plate (9-1) is consistent with that of the steel box girder, and the central longitudinal stiffening rib plate is connected with the steel box girder top plate (6) and the core steel cylinder (1) in a welding manner, the longitudinal stiffening rib plates (9-2) at two sides are arranged at two sides of the core steel cylinder (1) and are connected with the central stiffening diaphragm plate (8-1) in a welding manner, and the height of the central longitudinal stiffening rib plate is less than that of the steel box girder so as to ensure that a concrete pumping pipe in the steel box girder passes through;
the welding of the central longitudinal stiffening rib plate (9-1) and the longitudinal stiffening rib plates (9-2) at the two sides and the welding of the central stiffening diaphragm plate (8-1) and the stiffening diaphragm plates (8-2) at the two sides are carried out simultaneously.
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