CN116289619A - Large-span curve steel box girder installation system and construction method - Google Patents
Large-span curve steel box girder installation system and construction method Download PDFInfo
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- CN116289619A CN116289619A CN202310438074.2A CN202310438074A CN116289619A CN 116289619 A CN116289619 A CN 116289619A CN 202310438074 A CN202310438074 A CN 202310438074A CN 116289619 A CN116289619 A CN 116289619A
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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
- 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
- E01D21/10—Cantilevered erection
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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
- Y02A30/30—Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways
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Abstract
The invention relates to a large-span curve steel box girder installation system and a construction method, wherein the system comprises a steel pipe support, a steel pipe pile reducing connection structure, a beam cantilever hoisting device, an arch rib installation support, an arch rib temporary locking frame and an alarm navigation anti-collision pile; the method comprises the following steps: and (3) erecting a steel box girder bracket, hoisting the steel box girder, erecting an arch rib bracket, assembling an arch rib and driving an anti-collision pile. The beneficial effects of the invention are as follows: the steel pipe supports support the steel box girders, a construction platform system is formed between the steel box girders by adopting transverse tie beams, and the problems of high assembly difficulty and insufficient construction space of the large-span curve steel box girders are solved; the variable-diameter connecting structure of the steel pipe pile column solves the problems that the clearance under the steel box girder is too large, and the rigidity of a single-diameter steel pipe pile erection bracket is insufficient; the cantilever hoisting technology solves the problem that the deviation amplitude is too large to be controlled in the hoisting process of the beam; and an arch rib mounting bracket is also arranged, so that the problem of difficulty in the assembling process of the curve arch rib is solved.
Description
Technical Field
The invention belongs to the field of installation and construction of large-span curve steel box girders, and particularly relates to a large-span curve steel box girder installation system and a construction method.
Background
Steel box girder bracket erection and arch rib bracket erection are often challenging tasks during installation and implementation of large span curve steel box girders. This is because in the case of curved bridges, the brackets of the steel box girders and ribs have to be precisely adjusted and installed according to the curved shape of the bridge, which may require the use of special tools and techniques.
The steel box girder support is erected by considering the initial position, the inclination angle, the bending radius and other factors of the girder body so as to ensure that the girder body is kept stable in the installation process and is accurately matched with other bridge components. The bracket erection of the arch rib also needs to consider factors such as the shape, the length, the bending degree and the like of the arch rib so as to ensure that the arch rib can bear the weight and the pressure of the bridge and keep stable.
Moreover, the implementation of the closure segments of the ribs is also a challenging task. In this process, a plurality of ribs need to be precisely connected together to form the primary support structure of the bridge. This typically requires the use of high precision measuring instruments and tools to ensure that the position and angle of each rib meets design requirements.
Therefore, aiming at the problems, the invention provides a large-span curve steel box girder installation system and a construction method, which provide a plurality of convenient construction structures for the installation and construction of the large-span curve steel box girder, improve the installation and construction efficiency of the steel box girder and the closure section of the arch rib, and simultaneously ensure the stability of the steel box bracket.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a large-span curve steel box girder installation system and a construction method.
The large-span curve steel box girder installation system comprises a steel pipe support, a steel pipe pile diameter-changing connection structure, a beam cantilever hoisting device, an arch rib installation support, an arch rib temporary locking frame and an alarm navigation anti-collision pile;
the steel pipe support comprises a steel pipe pile, and the top of the steel pipe pile is provided with column top I-steel and column-to-column connecting I-steel; the steel pipe piles at the bottom of part of the steel pipe support are spliced with thick-diameter steel pipe piles to form a steel pipe pile diameter-changing connection structure, steel box girders are arranged on I-steel at the top of the steel pipe pile, and transverse tie girders are adopted for splicing between the steel box girders;
the cantilever hoisting device of the tie beam comprises a crane for hoisting a steel box girder to be installed or a closure section of an arch rib to be installed, and an anchor box is arranged on the steel box girder;
the steel box girder is also provided with steel pipe brackets, steel sections are welded on inter-column connecting I-steel of the steel pipe brackets on the steel box girder, and the steel sections are arranged according to the line type of the arch ribs to form arch rib mounting brackets;
the arch rib closure section is provided with an arch rib temporary locking frame, and the arch rib temporary locking frame comprises an arch rib sleeve and a steel pipe cross brace; the arch ribs on two sides of the arch rib closure section are respectively connected with arch rib sleeves, and the steel pipe cross braces are connected with the arch rib sleeves on two sides;
the warning navigation anti-collision piles are arranged on two sides of the steel box support and comprise anti-collision pile connecting rods and anti-collision piles, wherein gravel fillers are filled in the anti-collision piles.
As preferable: the steel pipe support comprises a main body formed by four steel pipe piles arranged at four corners of a square, steel plates are welded and connected between the steel pipe piles in the vertical direction, I-steel cross bars and I-steel diagonal struts are welded and connected between the adjacent steel pipe piles in the horizontal direction, steel pipe pile grooves are formed in the top end of the uppermost steel pipe pile of the steel pipe support, I-steel is connected between columns to connect the tops of the two steel pipe piles through the steel pipe pile grooves, I-steel is connected between the two columns through the welding and connection of the I-steel at the top of the column, a steel bottom plate is arranged at the bottom of a steel pipe support construction platform, anchor bolt holes are formed in the four corners of the steel bottom plate, the steel bottom plate is horizontally embedded on a concrete foundation and connected through anchor bolts, a reinforcing steel plate is welded and connected between the steel pipe support and the steel bottom plate, a steel box girder is arranged on the I-steel at the top of the upper part of the steel pipe support, and transverse tie beam splicing is adopted between the two steel box girders.
As preferable: the steel pipe pile is connected with the thick diameter steel pipe pile through a round steel plate and a fixed steel plate, a cross steel plate frame is welded inside the top end of the thick diameter steel pipe pile, the round steel plate is welded with the thick diameter steel pipe pile and the cross steel plate frame, and the steel pipe pile is welded with the round steel plate and the fixed steel plate.
As preferable: the steel pipe pile at the bottom of the steel pipe support is connected with the steel box girder through a steel bottom plate in a welded mode, U-shaped gaskets are arranged on inter-column connection I-steel at the top of the steel pipe support on the steel box girder, a Bailey beam steel pipe pile is arranged below a corresponding position of the steel box girder to be installed in a beating mode, the Bailey beam support is spliced on the Bailey beam steel pipe pile, a steel plate platform serving as a construction platform of a crane is welded on the Bailey beam support, an anchor box is arranged on the installed steel box girder and the steel box girder to be installed, the crane is hung on the steel box girder to be installed through a lifting hook, a steel stranded wire and a hanging hook, one end of the steel stranded wire is connected with the anchor box on the steel box girder, and the other end of the steel stranded wire penetrates through the U-shaped gaskets on the steel pipe support and is connected with the anchor box on the steel box girder to be installed.
As preferable: the arch rib sleeve is provided with arch rib sleeve lugs up and down, the side is provided with arch rib sleeve side sleeve, the lower part is provided with arch rib sleeve bottom sleeve, the beam arch rib sleeve passes through the arch rib sleeve lugs through the fixing bolts to anchor the arch rib, the steel pipe cross brace passes through the arch rib sleeve side sleeve and the arch rib sleeve bottom sleeve on the arch rib sleeve at two ends of the arch rib closure section, and the arch rib closure section is locked through the cooperation of the arch rib sleeve and the steel pipe cross brace.
As preferable: the warning navigation anti-collision pile comprises an anti-collision pile connecting rod and an anti-collision pile, wherein the bottom of each anti-collision pile is driven into a river bed bearing layer, the upper part of each anti-collision pile is horizontally welded with the corresponding anti-collision pile connecting rod, and sand and stone fillers are filled in the anti-collision pile.
The construction method of the large-span curve steel box girder installation system comprises the following steps:
step one, erecting a steel pipe support through a steel pipe pile, embedding the steel pipe support into a concrete foundation, or connecting a thick-diameter steel pipe pile at the lower part of the steel pipe support by adopting a variable-diameter connecting structure and driving the steel pipe pile into a river bed bearing layer; placing the steel box girders on I-steel at the top of the upper column of the construction platform, and splicing the steel box girders by adopting transverse tie girders;
step two, erecting a steel pipe bracket on the steel box girder, constructing a Beehive girder steel pipe pile in a work area where the steel box girder to be installed is located, welding a construction platform of a crane, arranging anchor boxes on the installed steel box girder and the end parts of the steel box girder to be installed, and hoisting the steel box girder to be installed;
step three, erecting a steel pipe bracket on the steel box girder, connecting I-steel between upper columns of the steel pipe bracket, welding profile steel on the I-steel, and arranging the profile steel according to the line type of the arch rib to form an arch rib mounting bracket;
hoisting the arch rib sections by using a crane and completing installation, and when the arch rib sections are constructed to the closure sections, locking by using an arch rib temporary locking frame, hoisting the arch rib closure sections to be installed by using the crane, and completing closure of the arch ribs;
and fifthly, arranging warning navigation anti-collision piles on two sides of the steel box support, driving the anti-collision piles into a river bed bearing layer, filling sand and stone fillers into the anti-collision piles, pulling out the anti-collision piles after bridge construction is completed and the steel box support is removed, and enabling the sand and stone fillers to fall into pile holes left after the anti-collision piles are pulled out.
Preferably, in the first step: the method comprises the steps of erecting a steel pipe support through steel pipe piles, welding and connecting the steel pipe piles, reinforcing the steel pipe piles by adopting steel plate welding, arranging four steel pipe piles subjected to welding and reinforcing at four corners of a square, welding and reinforcing the four steel pipe piles by adopting I-steel cross bars and I-steel diagonal braces, connecting I-steel among columns, welding and connecting the tops of the two steel pipe piles by penetrating steel pipe pile grooves, connecting I-steel among the two columns by adopting column top I-steel welding, arranging a steel bottom plate at the bottom of the steel pipe piles, horizontally embedding the steel bottom plate on a concrete foundation, reinforcing and connecting by adopting an anchor bolt, welding and connecting a construction platform and the steel bottom plate by adopting a reinforced steel plate; when the clearance of the steel box girder is too high, adopting a variable-diameter connecting structure, welding a cross steel plate frame in the top end of the large-diameter steel pipe pile, welding a round steel plate with the large-diameter steel pipe pile and the cross steel plate frame, welding the steel pipe pile with the round steel plate, reinforcing the steel pipe pile by welding a fixed steel plate, erecting the steel pipe pile on the upper part of the large-diameter steel pipe pile to form a steel pipe bracket, and driving the large-diameter steel pipe pile into a river bed bearing layer; during construction, the steel box girders are arranged on I-steel at the top of the upper column of the construction platform, and the two steel box girders are spliced by adopting a transverse tie beam.
Preferably, the second step specifically comprises: the steel box girder is erected with a steel pipe support, a Bailey girder steel pipe pile is arranged in a work area where the steel box girder is to be installed and the Bailey girder support is spliced, a steel plate platform is welded on the Bailey girder support to serve as a construction platform of a crane, anchor boxes are arranged on the installed steel box girder and the end part of the steel box girder to be installed, the steel box girder to be installed is lifted through the crane, one end of a steel strand is connected with an anchor box on the steel box girder, the other end of the steel strand penetrates through a U-shaped gasket on the steel pipe support on the steel box girder to be connected with the anchor box on the steel box girder to be installed, and prestress is applied to the steel strand in the anchor box to assist in crane lifting.
Preferably, in the fourth step: and (3) enabling the arch rib sleeve to pass through the arch rib sleeve lug blocks through the fixing bolts to hoop the arch rib, enabling the steel pipe cross brace to pass through the arch rib sleeve side sleeve and the arch rib sleeve bottom sleeve on the arch rib sleeve at the two ends of the arch rib closure section, and temporarily locking the arch rib closure section through the cooperation of the arch rib sleeve and the steel pipe cross brace.
The beneficial effects of the invention are as follows:
1) The structure of the invention can solve the construction problem of the large-span curve steel box girder installation system and has better technical benefit.
2) The steel pipe supports are used for supporting the steel box girders, and the transverse tie beams are used for forming a construction platform system between the steel box girders, so that the problems of high assembly difficulty and insufficient construction space of the large-span curve steel box girders are solved.
3) The steel pipe pile diameter-variable connection structure solves the problems that the clearance under a steel box girder is overlarge and the rigidity of a single-diameter steel pipe pile erection support is insufficient.
4) The problem that the deviation amplitude is too large to control in the beam hanging process is solved by adopting the beam hanging cantilever hanging technology.
5) The construction platform system is also provided with a steel pipe support, and the height of the steel pipe support is provided with section steel according to the line type of the arch rib, so that an arch rib mounting support is formed, and the problem of difficulty in the assembling process of the curve arch rib is solved.
6) The arch rib closing section construction technology is adopted, the temporary arch rib locking frame is arranged, the arch rib sleeves are respectively connected with the arch ribs on two sides of the arch rib closing section, and the steel pipe cross braces are connected with the arch rib sleeves on two sides, so that the problem that the arch rib closing precision is difficult to control during the arch rib closing section construction is solved.
7) The warning navigation anti-collision pile technology is adopted, and warning navigation anti-collision piles are arranged on two sides of the steel box support, so that the problem that potential safety hazards occur in construction due to the fact that the lower steel pipe support is prone to external impact in the bridge construction process is solved.
Drawings
FIG. 1 is a construction schematic diagram of a large-span curved steel box girder installation system;
FIG. 2 is a schematic diagram of a steel pipe support construction platform architecture;
FIG. 3 is an enlarged view of the upper circle of FIG. 3;
FIG. 4 is an enlarged view of the lower circle of FIG. 3;
FIG. 5 is a left side view of a steel pipe support construction platform system;
FIG. 6 is a construction schematic diagram of a steel pipe support construction platform system;
fig. 7 is a schematic structural diagram of a steel pipe pile reducing connection technology;
FIG. 8 is a schematic view of a steel single pipe pile reducing connection structure;
FIG. 9 is a schematic view of a structure of a thick-diameter steel pipe;
fig. 10 is a construction schematic diagram of a steel pipe pile reducing connection technology;
FIG. 11 is a schematic illustration of a beam cantilever lifting technique construction;
FIG. 12 is a schematic view of an auxiliary hoisting bracket for a steel box girder;
FIG. 13 is a schematic view of an unwelded steel structure of the rib bracket system;
FIG. 14 is a schematic view of construction of a rib bracket system after welding section steel;
FIG. 15 is a rear left side view of a rib bracket system welded section steel;
FIG. 16 is a rear elevational view of a rib bracket system welded section steel;
FIG. 17 is a schematic view of a temporary arch rib locking frame construction technique in an arch rib closure section;
FIG. 18 is a schematic cross-sectional view of a rib temporary locking shelf;
FIG. 19 is a schematic view of rib closure construction;
FIG. 20 is a front view of a warning navigation anti-collision pile technique;
FIG. 21 is a top view of a warning navigation anti-collision pile technique;
fig. 22 is a schematic view of a crash pile structure.
Wherein: the steel pile comprises a column top I-steel 1, inter-column connection I-steel 2, a steel pipe pile 3, a steel pipe pile grooving 4, a steel plate 5, a reinforced steel plate 6, a steel bottom plate 7, an anchor bolt 8, a concrete foundation 9, a steel box girder 10, a transverse tie girder 11, a round steel plate 12, an I-steel cross rod 13, a thick steel pipe pile 14, a fixed steel plate 15, a cross steel plate frame 16, a U-shaped gasket 17, an anchor box 18, a steel strand 19, a lifting hook 20, an I-steel diagonal brace 21, a hanging hook 22, a steel box girder 23 to be installed, a crane 24, a steel plate platform 25, a bailey girder bracket 26, a bailey girder steel pipe pile 27, a section steel 28, an arch rib sleeve 29, a steel pipe cross brace 30, an arch rib sleeve ear block 31, a fixed bolt 32, an arch rib sleeve side sleeve 33, an arch rib sleeve bottom sleeve 34, an arch rib 35, an arch rib closure segment to be installed 36, an anti-collision pile connecting rod 37, an anti-collision pile 38 and a sand filling 39.
Detailed Description
The invention is further described below with reference to examples. The following examples are presented only to aid in the understanding of the invention. It should be noted that it will be apparent to those skilled in the art that modifications can be made to the present invention without departing from the principles of the invention, and such modifications and adaptations are intended to be within the scope of the invention as defined in the following claims.
Example 1
As an embodiment, as shown in fig. 1 to 22, a large-span curve steel box girder installation system comprises a steel pipe bracket, a steel pipe pile reducing connection structure, a tie beam cantilever hoisting device, an arch rib installation bracket, an arch rib temporary locking frame and an alarm navigation anti-collision pile;
the steel pipe support comprises a steel pipe pile 3, wherein the top of the steel pipe pile 3 is provided with a column top I-steel 1 and a column-to-column connecting I-steel 2; the steel pipe pile 3 at the bottom of a part of the steel pipe support is spliced with a thick-diameter steel pipe pile 14 to form a steel pipe pile diameter-changing connection structure, steel box girders 10 are arranged on I-steel 1 at the top of the pile, and the steel box girders 10 are spliced by adopting transverse tie girders 11;
the cantilever hoisting device of the tie beam comprises a crane 24 for hoisting a steel box beam 23 to be installed or a rib closure section 36 to be installed, and an anchor box 18 is arranged on the steel box beam 10;
the steel box girder 10 is also provided with steel pipe brackets, steel sections 28 are welded on the inter-column connecting I-steel 2 of the steel pipe brackets on the steel box girder 10, and the height of the steel sections 28 is set according to the line type of the arch ribs 35 to form arch rib mounting brackets;
the arch rib closure section is provided with an arch rib temporary locking frame which comprises an arch rib sleeve 29 and a steel pipe cross brace 30; the arch ribs 35 on two sides of the arch rib closure section are respectively connected with arch rib sleeves 29, and the steel pipe cross braces 30 are connected with the arch rib sleeves 29 on two sides;
the warning navigation anti-collision piles are arranged on two sides of the steel box support and comprise anti-collision pile connecting rods 37 and anti-collision piles 38, wherein gravel fillers 39 are filled in the anti-collision piles 38.
Referring to fig. 2-6, the steel pipe support construction platform system comprises a main body formed by four steel pipe piles 3 arranged at four corners of a square, wherein the steel pipe piles 3 are vertically connected by welding and reinforced by steel plates 5, adjacent steel pipe piles 3 are horizontally connected by welding I-steel cross bars 13 and I-steel diagonal struts 21, steel pipe pile slots 4 are formed in the top ends of the steel pipe piles 3 on the upper part of the construction platform, inter-column connection I-steel 2 penetrates through the steel pipe pile slots 4 to connect the tops of the two steel pipe piles 3, column top I-steel 1 connects the two columns by welding the I-steel 2, a steel bottom plate 7 is arranged at the bottom of the construction platform, anchor bolt holes are formed in the four corners of the steel bottom plate 7, the steel bottom plate 7 is horizontally embedded on a concrete foundation 9 and reinforced by anchor bolts 8, the construction platform is welded and reinforced by the steel plates 6, steel box girders 10 are arranged on the I-steel 1 on the column top of the upper part of the construction platform, and the two steel box girders 10 are spliced by the cross tie girders 11.
Referring to fig. 7 to 10, in the steel pipe pile reducing connection structure, a cross steel plate frame 16 is welded inside the top end of the large-diameter steel pipe pile 14, a round steel plate 12 is welded with the large-diameter steel pipe pile 14 and the cross steel plate frame 16, and a steel pipe pile 3 is welded with the round steel plate 12 and reinforced by a fixed steel plate 15.
Referring to fig. 11-12, a steel pipe bracket is arranged on a steel box girder 10, a steel pipe pile 3 at the bottom of the steel pipe bracket is welded with the steel box girder 10 through a steel bottom plate 7, a U-shaped gasket 17 is arranged on a connection I-steel 2 between steel pipe bracket top posts, a bailey girder steel pipe pile 27 is arranged in a work area where a steel box girder 23 to be installed is located, a bailey girder bracket 26 is spliced, a steel plate platform 25 is welded on the bailey girder bracket 26 to serve as a crane 24 construction platform, an anchor box 18 is arranged on the installed steel box girder 10 and the steel box girder 23 to be installed, a hook 22 is used for lifting the steel box girder 23 to be installed through a lifting hook 20 of the crane 24 in cooperation with a steel stranded wire 19, one end of the steel stranded wire 19 is connected with an anchor box on the steel box girder 10, the U-shaped gasket 17 on the steel box girder 23 to be installed is penetrated through, and a prestress is applied to the steel stranded wire 19 in the anchor box 18 to assist in lifting the steel box girder 23 to be installed.
As shown in fig. 13-16, the arch rib installing support is formed by welding section steel 28 on the I-steel 2 connected between the upper columns of the steel pipe support, and the section steel 28 is arranged according to the arch rib line type.
Referring to fig. 17-19, in the arch rib folding section construction technology, the arch rib temporary locking frame is composed of an arch rib sleeve 29 and a steel pipe cross brace 30, arch rib sleeve lugs 31 are arranged on the upper portion and the lower portion of the arch rib sleeve 29, arch rib sleeve side sleeves 33 are arranged on the side face of the arch rib sleeve 29, arch rib sleeve bottom sleeves 34 are arranged on the lower portion of the arch rib sleeve, the beam arch rib sleeve 29 penetrates through the arch rib sleeve lugs 31 through fixing bolts 32 to hoop arch rib 35, the steel pipe cross brace 30 penetrates through the arch rib sleeve side sleeves 33 and the arch rib sleeve bottom sleeves 34 on the arch rib sleeve 29 at two ends of the arch rib closure section, the arch rib closure section is temporarily locked through the cooperation of the arch rib sleeve 29 and the steel pipe cross brace 30, and the arch rib closure section 36 to be installed is hoisted by adopting a crane 24 to complete the arch rib folding.
20-22, warning navigation anti-collision piles are arranged on two sides of a steel box support during bridge construction, the warning navigation anti-collision piles are composed of anti-collision pile connecting rods 37 and anti-collision piles 38, the anti-collision piles 38 are formed by three steel pipe piles driven into a bearing layer of a river bed, the anti-collision pile connecting rods 37 are welded on the upper portion of each anti-collision pile 38 in a horizontal mode, and sand and stone fillers 39 are filled in the anti-collision piles 38.
Example two
As another embodiment, the construction method of the large span curve steel box girder installation system provided in the first embodiment includes the following steps:
step one, a steel box girder bracket is erected, steel pipe piles 3 are welded and connected and reinforced by adopting steel plates 5, four steel pipe piles 3 which are welded and reinforced are arranged at four corners of a square, I-steel cross bars 13 and I-steel diagonal braces 21 are welded and reinforced among the four steel pipe piles 3, inter-column connection I-steel 2 passes through steel pipe pile grooves 4 and is welded and connected with the tops of the two steel pipe piles 3, two inter-column connection I-steel 2 passes through post top I-steel 1 and is welded and connected with the bottoms of the steel pipe piles 3, a steel bottom plate 7 is arranged at the bottoms of the steel pipe piles 3, the steel bottom plate 7 is horizontally embedded on a concrete foundation 9 and is reinforced and connected by adopting anchor bolts 8, a construction platform is welded and connected with the steel bottom plate 7 by adopting reinforced steel plates 6, and the steel box girder bracket is erected up; when the steel box girder 10 is excessively high in clearance, adopting a reducing connection technology, welding a cross steel plate frame 16 in the top end of the large-diameter steel pipe pile 14, welding a round steel plate 12 with the large-diameter steel pipe pile 14 and the cross steel plate frame 16, welding a steel pipe pile 3 with the round steel plate 12, and reinforcing by welding a fixed steel plate 15, wherein the upper steel pipe pile 3 is connected by adopting the steel box girder bracket erection method, and the lower large-diameter steel pipe pile 14 is driven into a river bed bearing layer; during construction, the steel box girders 10 are arranged on the I-steel 1 at the top of the upper column of the construction platform, and the two steel box girders 10 are spliced by adopting a transverse tie girder 11.
Step two, hoisting the steel box girder, during construction, erecting a steel pipe support on the steel box girder 10, welding the steel pipe pile 3 at the bottom of the steel pipe support with the steel box girder 10 through a steel bottom plate 7, beating a Bailey girder steel pipe pile 27 at a work area where the steel box girder 23 is to be installed, splicing the Bailey girder support 26, welding a steel plate platform 25 on the Bailey girder support 26 as a crane 24 construction platform, arranging anchor boxes 18 on the installed steel box girder 10 and the end part of the steel box girder 23 to be installed, hoisting the steel box girder 23 to be installed through the crane 24, connecting one end of a steel stranded wire 19 with the anchor box on the steel box girder 10, connecting the U-shaped gasket 17 on the steel pipe support with the anchor box 18 on the steel box girder 23 to be installed, and applying prestress to the steel stranded wire 19 in the anchor box 18 to enable the end part of the steel box girder 23 to be installed to obtain the tension from the steel stranded wire 19, thereby assisting in crane hoisting.
And thirdly, erecting an arch rib support, erecting a steel pipe support on the steel box girder 10, welding section steel 28 on the I-steel 2 connected between the upper columns of the steel pipe support, and arranging the section steel 28 according to the arch rib line type to form an arch rib mounting support.
And fourthly, assembling arch ribs, namely hoisting the sections of the arch ribs 25 by adopting a crane 24, completing the installation, locking by adopting an arch rib temporary locking frame when constructing a closure section, enabling an arch rib sleeve 29 to pass through an arch rib sleeve lug 31 through a fixing bolt 32 to hoop an arch rib 35, enabling a steel pipe cross brace 30 to pass through an arch rib sleeve side sleeve 33 and an arch rib sleeve bottom sleeve 34 on the arch rib sleeve 29 at two ends of the arch rib closure section, temporarily locking the arch rib closure section by adopting the crane 24 in cooperation with the steel pipe cross brace 30, and hoisting the arch rib closure section 36 to be installed by adopting the crane 24, thus completing the closure of the arch ribs.
Step five, the anti-collision piles are driven, during construction, warning navigation anti-collision piles are arranged on two sides of the steel box support, three anti-collision piles 38 are driven into a river bed bearing layer, anti-collision pile connecting rods 37 are welded horizontally on the upper parts of the anti-collision piles 38, sand and stone fillers 39 are filled in the anti-collision piles 38, after the bridge construction is completed and the steel box support is removed, the anti-collision pile connecting rods 37 are removed, the anti-collision piles 38 are pulled out, and the sand and stone fillers 39 fall into pile holes left after the anti-collision piles 38 are pulled out.
Claims (10)
1. The large-span curve steel box girder installation system is characterized by comprising a steel pipe support, a steel pipe pile reducing connection structure, a tie beam cantilever hoisting device, an arch rib installation support, an arch rib temporary locking frame and an alarm navigation anti-collision pile;
the steel pipe support comprises a steel pipe pile (3), wherein a column top I-steel (1) and a column-to-column connecting I-steel (2) are arranged at the top of the steel pipe pile (3); the steel pipe pile (3) at the bottom of a part of the steel pipe support is spliced with a thick-diameter steel pipe pile (14) to form a steel pipe pile diameter-changing connection structure, steel box girders (10) are arranged on I-steel (1) at the top of the steel pipe, and transverse tie girders (11) are adopted for splicing the steel box girders (10);
the cantilever hoisting device of the tie beam comprises a crane (24) for hoisting a steel box beam (23) to be installed or a rib closure section (36) to be installed, and an anchor box (18) is arranged on the steel box beam (10);
the steel box girder (10) is also provided with a steel pipe bracket, steel sections (28) are welded on inter-column connecting I-steel (2) of the steel pipe bracket on the steel box girder (10), and the height of the steel sections (28) is linearly arranged according to arch ribs (35) to form arch rib mounting brackets;
the arch rib closure section is provided with an arch rib temporary locking frame, and the arch rib temporary locking frame comprises an arch rib sleeve (29) and a steel pipe cross brace (30); arch ribs (35) on two sides of the arch rib closure section are respectively connected with arch rib sleeves (29), and steel pipe cross braces (30) are connected with the arch rib sleeves (29) on two sides;
the warning navigation anti-collision piles are arranged on two sides of the steel box support and comprise anti-collision pile connecting rods (37) and anti-collision piles (38), wherein gravel fillers (39) are filled in the anti-collision piles (38).
2. The large-span curve steel box girder installation system according to claim 1, wherein the steel pipe support comprises a main body formed by four steel pipe piles (3) arranged at four corners of a square, steel plates (5) are adopted for welding connection between the steel pipe piles (3) in the vertical direction, adjacent steel pipe piles (3) are welded and connected by I-shaped steel cross bars (13) and I-shaped steel diagonal braces (21) in the horizontal direction, steel pipe pile grooving (4) are arranged at the top end of the steel pipe pile (3) at the uppermost part of the steel pipe support, I-shaped steel (2) is connected between columns through the steel pipe pile grooving (4) to connect the tops of the two steel pipe piles (3), I-shaped steel (1) at the top of the column is welded and connected with I-shaped steel (2) between the two columns, steel bottom plates (7) are arranged at the bottom of a steel pipe support construction platform, steel bottom plates (7) are provided with steel bolt holes, the steel bottom plates (7) are horizontally embedded on a concrete foundation (9) and are connected by adopting anchor bolts (8), the steel pipe support and the steel bottom plates (7) are welded and connected by adopting reinforced steel plates (6), the steel box girders (10) are arranged on the top of the I-shaped steel pile (1) at the upper part of the steel pipe support, and the steel box girders (10) are spliced by adopting the anchor girders (11).
3. The large-span curved steel box girder installation system according to claim 1, wherein the steel pipe pile (3) and the large-diameter steel pipe pile (14) are connected through a round steel plate (12) and a fixed steel plate (15), a cross steel plate frame (16) is welded inside the top end of the large-diameter steel pipe pile (14), the round steel plate (12) is welded with the large-diameter steel pipe pile (14) and the cross steel plate frame (16), and the steel pipe pile (3) is welded with the round steel plate (12) and is welded with the fixed steel plate (15).
4. The large-span curve steel box girder installation system according to claim 1, wherein a steel pipe support is arranged on a steel box girder (10), a steel pipe pile (3) at the bottom of the steel pipe support is welded with the steel box girder (10) through a steel bottom plate (7), a U-shaped gasket (17) is arranged on inter-column connection I-steel (2) at the top of the steel pipe support on the steel box girder (10), a bailey girder steel pipe pile (27) is arranged below a corresponding position of the steel box girder (23) to be installed, a bailey girder support (26) is spliced on the bailey girder steel pipe pile (27), a steel plate platform (25) is welded on the bailey girder support (26) to serve as a construction platform of a crane (24), an anchor box (18) is arranged on the installed steel box girder (10) and the steel box girder (23) to be installed, the steel box girder (23) to be installed is hung and connected with one end of the steel stranded wire (19) through a lifting hook (20), the other end of the steel stranded wire (19) is connected with an anchor box (18) on the steel box girder (10) through the steel pipe support (17) to be installed on the anchor box girder (23).
5. The large-span curve steel box girder installation system according to claim 1, wherein arch rib sleeves (29) are provided with arch rib sleeve lugs (31) up and down, side surfaces are provided with arch rib sleeve side sleeves (33), lower parts are provided with arch rib sleeve bottom sleeves (34), the girder arch rib sleeves (29) penetrate through the arch rib sleeve lugs (31) through fixing bolts (32) to hold arch ribs (35) in the hoops, steel pipe cross braces (30) penetrate through the arch rib sleeve side sleeves (33) and the arch rib sleeve bottom sleeves (34) on the arch rib sleeves (29) at two ends of an arch rib closure section, and the arch rib closure section is locked through the arch rib sleeves (29) in cooperation with the steel pipe cross braces (30).
6. The large-span curve steel box girder installation system according to claim 1, wherein the warning navigation anti-collision piles comprise anti-collision pile connecting rods (37) and anti-collision piles (38), the bottoms of the three anti-collision piles (38) are driven into a river bed bearing layer, the anti-collision pile connecting rods (37) are horizontally welded at the upper parts of the anti-collision piles (38), and sand and stone fillers (39) are filled in the anti-collision piles (38).
7. The construction method of the large span curve steel box girder installation system as claimed in any one of claims 1 to 6, comprising the steps of:
step one, erecting a steel pipe support through a steel pipe pile (3), embedding the steel pipe support into a concrete foundation (9), or connecting a thick steel pipe pile (14) at the lower part of the steel pipe support by adopting a reducing connecting structure and driving the steel pipe support into a river bed bearing layer; placing steel box girders (10) on I-steel (1) at the top of a column at the upper part of a construction platform, and splicing the steel box girders (10) by adopting transverse tie girders (11);
step two, erecting a steel pipe bracket on the steel box girder (10), erecting a Beehive girder steel pipe pile (27) and welding a construction platform of a crane (24) in a work area where the steel box girder (23) to be installed is positioned, arranging anchor boxes (18) on the installed steel box girder (10) and the end part of the steel box girder (23) to be installed, and hoisting the steel box girder (23) to be installed;
step three, erecting a steel pipe bracket on the steel box girder (10), connecting I-steel (2) between upper columns of the steel pipe bracket, welding section steel (28), and arranging the section steel (28) according to the arch rib line type to form an arch rib mounting bracket;
hoisting the arch rib (35) sections by adopting a crane (24) and completing installation, locking by adopting an arch rib temporary locking frame when constructing the closure section, hoisting the arch rib closure section (36) to be installed by adopting the crane (24), and completing closure of the arch rib;
step five, arranging warning navigation anti-collision piles on two sides of the steel box support, driving the anti-collision piles (38) into a river bed bearing layer, filling sand and stone fillers (39) into the anti-collision piles (38), pulling out the anti-collision piles (38) after bridge construction is completed and the steel box support is removed, and enabling the sand and stone fillers (39) to fall into pile holes left after the anti-collision piles (38) are pulled out.
8. The construction method of the large-span curved steel box girder installation system according to claim 7, wherein in the step one: the method comprises the steps of erecting a steel pipe support through steel pipe piles (3), welding and connecting the steel pipe piles (3) and reinforcing the steel pipe piles by adopting steel plates (5), arranging four steel pipe piles (3) subjected to welding and reinforcing at four corners of a square, welding and reinforcing the four steel pipe piles (3) by adopting I-shaped steel cross bars (13) and I-shaped steel diagonal braces (21), connecting I-shaped steel (2) among columns, penetrating steel pipe pile grooving (4) to weld the tops of the two steel pipe piles (3), connecting the I-shaped steel (2) among the two columns, welding and connecting the I-shaped steel (2) through column top I-shaped steel (1), arranging a steel bottom plate (7) at the bottom of the steel pipe piles (3), horizontally embedding the steel bottom plate (7) on a concrete foundation (9) and reinforcing the steel bottom plate by adopting anchor bolts (8), welding and reinforcing the steel plate (6) between a construction platform and the steel bottom plate (7); when the clearance of the steel box girder (10) is too high, adopting a reducing connection structure, welding a cross steel plate frame (16) in the top end of the thick-diameter steel pipe pile (14), welding a round steel plate (12) with the thick-diameter steel pipe pile (14) and the cross steel plate frame (16), welding and connecting the steel pipe pile (3) with the round steel plate (12) and reinforcing the steel pipe pile by welding a fixed steel plate (15), erecting the steel pipe pile (3) on the upper part of the thick-diameter steel pipe pile (14) to form a steel pipe bracket, and driving the thick-diameter steel pipe pile (14) into a river bed bearing layer; during construction, the steel box girders (10) are arranged on the I-steel (1) at the top of the upper part of the construction platform, and the two steel box girders (10) are spliced by adopting a transverse tie beam (11).
9. The construction method of the large-span curve steel box girder installation system according to claim 7, wherein the second step is specifically: a steel pipe support is erected on a steel box girder (10), a bailey girder steel pipe pile (27) is erected in a work area where a steel box girder (23) to be installed is located, the bailey girder support (26) is spliced, a steel plate platform (25) is welded on the bailey girder support (26) to serve as a construction platform of a crane (24), anchor boxes (18) are arranged on the installed steel box girder (10) and the end part of the steel box girder (23) to be installed, the steel box girder (23) to be installed is hoisted through the crane (24), one end of a steel stranded wire (19) is connected with an anchor box (18) on the steel box girder (10), a U-shaped gasket (17) on the steel pipe support on the steel box girder (10) is penetrated through the other end of the steel box girder to be connected with the anchor box (18) on the steel box girder (23) to be installed, and prestress auxiliary hoisting is applied to the steel stranded wire (19) in the anchor boxes (18).
10. The construction method of the large-span curve steel box girder installation system according to claim 7, wherein in the fourth step: the arch rib sleeve (29) passes through the arch rib sleeve lug blocks (31) through the fixing bolts (32), the arch rib (35) is hooped, the steel pipe cross brace (30) passes through the arch rib sleeve side sleeve (33) and the arch rib sleeve bottom sleeve (34) on the arch rib sleeve (29) at the two ends of the arch rib closure section, and the arch rib closure section is temporarily locked through the arch rib sleeve (29) and the steel pipe cross brace (30).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310438074.2A CN116289619A (en) | 2023-04-20 | 2023-04-20 | Large-span curve steel box girder installation system and construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310438074.2A CN116289619A (en) | 2023-04-20 | 2023-04-20 | Large-span curve steel box girder installation system and construction method |
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| CN202310438074.2A Pending CN116289619A (en) | 2023-04-20 | 2023-04-20 | Large-span curve steel box girder installation system and construction method |
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| Country | Link |
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| CN (1) | CN116289619A (en) |
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