CN114808750A - Manufacturing and assembling process for double-layer highway bridge deck steel truss girder segments - Google Patents
Manufacturing and assembling process for double-layer highway bridge deck steel truss girder segments Download PDFInfo
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- CN114808750A CN114808750A CN202210436272.0A CN202210436272A CN114808750A CN 114808750 A CN114808750 A CN 114808750A CN 202210436272 A CN202210436272 A CN 202210436272A CN 114808750 A CN114808750 A CN 114808750A
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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
- E01D21/06—Methods or apparatus specially adapted for erecting or assembling bridges by translational movement of the bridge or bridge sections
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
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- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/12—Grating or flooring for bridges; Fastening railway sleepers or tracks to bridges
- E01D19/125—Grating or flooring for bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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Abstract
The invention relates to a manufacturing and assembling process of double-layer highway bridge deck steel truss girder segments, which is characterized by comprising the following steps of: the specific manufacturing and assembling process comprises the following steps: s1: manufacturing a truss sheet; s2: manufacturing an upper layer bridge deck plate; s4: manufacturing a lower-layer bridge deck plate; s5: integrally assembling the double-layer highway bridge deck steel truss girder sections; through adopting the modularization to assemble the bridge, the place of reproduction bridge just can assemble the module of part bridge, has reduced the degree of difficulty of on-the-spot bridge construction, has reduced the amount of labour that the bridge was made, has shortened the time that the bridge was made, has promoted the efficiency of work.
Description
Technical Field
The invention relates to the technical field of double-deck highway bridge deck manufacturing, in particular to a manufacturing and assembling process of steel truss girder segments of double-deck highway bridge decks.
Background
With the rapid development of social economy, the pressure of land traffic is more and more prominent, in order to solve the pressure, the construction of a large number of projects such as railways, highways and the like is imperative, in order to cross large rivers and rivers which are passed by roads, the use of large-span bridges tends to be inevitable, and people also design the structures of bridges with different distances.
At present, part of steel trussed beams adopt an upper-lower double-layer form, the side edges of an upper bridge floor and a lower bridge floor are connected by truss pieces, and bridge deck units are paved on the upper bridge floor and the lower bridge floor on T-shaped crossbeams. Because each part is manufactured separately in the manufacturing process, the precision requirement is very high due to bolt connection when the parts are assembled on a construction site, and therefore, pre-assembly is necessary after the parts are manufactured; because the steel truss girder bridge has large section size and heavy weight of each part, the three-dimensional assembly has high requirements on hoisting equipment, and the equipment cost is increased; the stereo assembly has large workload and long period.
Disclosure of Invention
The invention aims to solve the technical problem of providing a manufacturing and assembling process of double-layer highway bridge deck steel truss girder segments, which can solve the problems of poor assembling precision and low integral assembling efficiency of common double-layer highway steel truss girder large segments.
In order to solve the technical problems, the technical scheme of the invention is as follows: a manufacturing and assembling process for double-layer highway bridge deck steel truss girder segments is characterized by comprising the following steps: the specific manufacturing and assembling process comprises the following steps:
s1: manufacturing a truss sheet: the truss piece comprises an upper chord, a lower chord, an oblique rod and a vertical rod;
s1.1: manufacturing the upper chord: the upper chord member comprises an upper horizontal plate, a lower horizontal plate, a gusset plate, a beam web joint plate, a beam flange joint plate and a vertical plate; blanking each plate unit through numerical control cutting, and finishing independent processing and finishing of each plate unit; the upper chord members are assembled in an inverted mode, the upper horizontal plate is placed on the jig frame, the partition plate and the vertical plate are sequentially assembled to form a groove shape, and after welding and trimming, the upper horizontal plate is assembled to form a box shape; drilling positioning holes of each hole group by using a double-gantry numerical control drilling machine for bolt holes of the upper chord member box body, and then drilling other bolt holes by using a small-sized mechanical sample plate;
s1.2: manufacturing the lower chord: cutting and blanking each plate unit of the lower chord according to the processing requirement, placing a lower horizontal plate of the lower chord on a jig frame, sequentially placing a partition plate of the lower chord on the lower horizontal plate of the lower chord, arranging vertical plate units on two sides of the partition plate to form a groove-shaped structure, and finishing; then assembling the upper horizontal plate of the lower chord to form a box shape; drilling positioning holes of each hole group by using a double-gantry numerical control drilling machine for the bolt holes of the lower chord member box body, and then drilling other bolt holes by using a small-sized mechanical sample plate;
s1.3: assembling truss pieces: the truss sheet assembly adopts a scheme of multi-section continuous matching assembly, namely each group is not less than 4 whole sections, and one section is left as a mother section of the next group to participate in the assembly after the assembly of the previous group is finished; placing the upper chord member and the lower chord member on an assembling jig frame to enable the upper chord member and the lower chord member to be in line with the camber, and adjusting the azimuth dimension to be in line with the standard requirement; after the detection is qualified, adopting a temporary positioning measure for positioning; sequentially assembling web members formed by the diagonal rods and the vertical rods, and matching the web members with a push pick when the web members are in place; after the sizes of all parts are detected to be qualified, welding of the welding seam is completed; detecting and recording after welding and trimming as a basis for reserving shrinkage of subsequent units; after the inspection is qualified, the single truss is disassembled into single truss pieces, and a section of the single truss piece is reserved to be used as a mother section of the next round to participate in assembly;
s2: manufacturing an upper layer bridge deck plate: the upper deck comprises an upper bridge deck unit and an upper T-shaped cross beam; dividing the bridge deck units according to the design process parameters of the upper bridge deck units, finishing the manufacture of each upper bridge deck unit, and then assembling the bridge deck units on a jig frame through simulated chords and auxiliary positioning; the upper T-shaped cross beams are laid on the jig frame in parallel according to the design requirements, then the upper bridge deck units are assembled from the middle part to two sides in sequence, the assembled joints are welded in sequence, and finally the non-reference ends are scribed and cut;
s4: manufacturing a lower-layer bridge deck plate: the lower deck comprises a lower bridge deck unit, a lower T-shaped cross beam and a bottom plate unit; the lower bridge deck unit adopts a parallel process scheme of continuous matching assembly welding and trial assembly, namely 5 whole sections are assembled by each wheel set, and a section is left to be used as a female section of the next wheel to participate in assembly after the assembly of the previous wheel is completed; dividing and manufacturing the bottom plate unit according to designed parameters, and then laying and positioning the bottom plate unit on a jig frame; arranging a lower T-shaped cross beam on the bottom plate unit, temporarily positioning the lower T-shaped cross beam through the simulation chord members, mounting web plate units on two sides of the lower T-shaped cross beam, and assembling the heavy pressure area reinforcing ribs; dividing the lower bridge deck units according to the design process parameters of the lower bridge deck units, and finishing the manufacture of each lower bridge deck unit; assembling the lower bridge deck units from the middle part to the two sides in sequence, welding assembling seams in sequence at the same time, and finally scribing and cutting off the non-reference ends;
s5: the integral assembly of the double-layer highway bridge surface steel truss girder sections: laying the finished lower deck on a jig frame and positioning; then, mounting a truss sheet on one side of the lower deck, and stabilizing the truss sheet through a tool; secondly, installing a truss sheet at the other side and assisting with a temporary fixing device; finally, assembling an upper layer bridge deck, and after the assembly is finished, detecting quality stop points, wherein the quality stop points comprise a horizontal surface angle difference, an upper bridge deck elevation and a main truss center distance, and scribing for secondarily cutting the length of the bridge deck; sequentially carrying out positioning of the lower deck, truss piece assembling on two sides and upper deck assembling; and after the assembly welding is finished, detecting quality stop points, including total length, lateral bending, truss width, diagonal difference and camber, disassembling and transferring the tire after the quality stop points are qualified, and leaving a mother section to participate in the next round of whole section assembly.
Further, in the integral assembly of the S5 double-layer highway bridge deck steel truss girder segment, the integral segment is assembled on a jig frame, the elevation of the jig frame is linearly arranged according to the camber, and the elevation is measured and adjusted every turn; temporary supporting and fixing devices are arranged on the jig frame to ensure stable and safe assembly and assembly precision; the three integral truss pieces of the same integral section have consistent truss height deviation directions and are within an allowable deviation range; and the central line matching deviation of each main truss rod piece on the construction site connecting section of the adjacent sections is controlled within the allowable deviation range of the manufacturing rule.
Further, in the assembly of the S1.3 truss sheets; the welding seams among the diagonal rods, the vertical rods and the nodes of the upper chord rod and the lower chord rod are divided into two times, namely, the side of the upper chord rod is welded firstly, and then the side of the lower chord rod is welded, so that the influence of partial welding shrinkage on the truss height is avoided.
Furthermore, in the assembly of the S1.3 truss sheets, the central line matching deviation of the upper chord member, the lower chord member and the diagonal web member of the adjacent whole sections is controlled to be less than or equal to +/-0.5 mm; the truss sheet is not turned over in the manufacturing process, the vertical plate below the truss sheet and the welding line of the gusset plate adopt asymmetric double-sided welding lines or single-sided welding lines, and the web plate of the box-shaped web member can be reserved with an embedding section, so that the welding construction space of the lower welding line is ensured.
The invention has the advantages that:
1) according to the invention, a continuous assembly mode is adopted, the truss sheets, the upper layer bridge deck and the lower layer bridge deck are independently installed by adopting multiple wheels, and a section of truss sheets is left to participate in installation as a female section of a next wheel on the basis of the assembly of the previous wheel, so that the smooth connection between adjacent structures can be ensured, and the installation precision is ensured; the assembly sequence of the lower deck, the truss pieces and the upper deck is sequentially assembled, the last bridge piece is disassembled and assembled on site, the overall assembly efficiency of the large sections of the steel truss girder is improved, and the assembly precision is guaranteed.
2) The modular assembly method is adopted to realize the modular assembly of the steel truss girder, the truss segment module is divided into a plurality of small modules for independent assembly, the matching assembly between the related small modules can be realized, the assembly process is reasonable, the assembly operation is simple, partial modules of the steel truss girder can be assembled in a production field, the difficulty of on-site bridge construction is reduced, the labor amount of the steel truss girder manufacture is reduced, the time of the steel truss girder manufacture is shortened, and the work efficiency is improved; in the process of assembling the steel truss girder sections, a special jig frame is adopted for assembling each module, so that the assembling precision of each section module is ensured; and after welding of each welding part is finished, an ultrasonic detector is adopted to detect the flaw of the welding part, so that the welding effect is ensured.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a flow chart of the manufacturing and assembling process of the double-deck steel truss girder segment of the invention.
FIG. 2 is a state diagram of the truss sheet manufacturing of the double deck steel truss girder segment assembly process of the present invention.
FIG. 3 is a manufacturing state diagram of an upper deck plate block of the double-deck highway deck steel truss girder segment manufacturing and assembling process of the invention.
FIG. 4 is a manufacturing state diagram of an upper deck plate block of the double-deck highway deck steel truss girder segment manufacturing and assembling process of the invention.
FIG. 5 is a final assembled state view of a process for manufacturing and assembling double deck steel truss girder segments of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The manufacturing and assembling process of the double-deck highway deck steel truss girder segment shown in fig. 1 to 5 specifically comprises the following steps:
s1: manufacturing a truss sheet: the truss piece comprises an upper chord, a lower chord, an oblique rod and a vertical rod;
s1.1: manufacturing the upper chord: the upper chord member comprises an upper horizontal plate, a lower horizontal plate, a gusset plate, a beam web joint plate, a beam flange joint plate and a vertical plate; blanking each plate unit through numerical control cutting, and finishing independent processing and finishing of each plate unit; the upper chord members are assembled in an inverted mode, the upper horizontal plate is placed on the jig frame, the partition plate and the vertical plate are sequentially assembled to form a groove shape, and after welding and trimming, the upper horizontal plate is assembled to form a box shape; drilling positioning holes of each hole group by using a double-gantry numerical control drilling machine for bolt holes of the upper chord member box body, and then drilling other bolt holes by using a small-sized mechanical sample plate;
s1.2: manufacturing the lower chord: cutting and blanking each plate unit of the lower chord according to the processing requirement, placing a lower horizontal plate of the lower chord on a jig frame, sequentially placing a partition plate of the lower chord on the lower horizontal plate of the lower chord, arranging vertical plate units on two sides of the partition plate to form a groove-shaped structure, and finishing; then assembling the upper horizontal plate of the lower chord to form a box shape; drilling positioning holes of each hole group by using a double-gantry numerical control drilling machine for the bolt holes of the lower chord member box body, and then drilling other bolt holes by using a small-sized mechanical sample plate;
s1.3: assembling truss pieces: the truss sheet assembly adopts a scheme of multi-section continuous matching assembly, namely each group is not less than 4 whole sections, and one section is left as a mother section of the next group to participate in the assembly after the assembly of the previous group is finished; placing the upper chord member and the lower chord member on an assembling jig frame to enable the upper chord member and the lower chord member to be in line with the camber, and adjusting the azimuth dimension to be in line with the standard requirement; after the detection is qualified, adopting a temporary positioning measure for positioning; sequentially assembling web members formed by the diagonal rods and the vertical rods, and matching the web members with a push pick when the web members are in place; after the sizes of all parts are detected to be qualified, welding of the welding seam is completed; detecting and recording after welding and trimming as a basis for reserving shrinkage of subsequent units; after the inspection is qualified, the single truss is disassembled into single truss pieces, and a section of the single truss piece is reserved to be used as a mother section of the next round to participate in assembly;
s2: manufacturing an upper layer bridge deck plate: the upper deck comprises an upper deck panel unit and an upper T-shaped cross beam; dividing the bridge deck units according to the design process parameters of the upper bridge deck units, finishing the manufacture of each upper bridge deck unit, and then assembling the bridge deck units on a jig frame through simulated chords and auxiliary positioning; the upper T-shaped cross beams are laid on the jig frame in parallel according to the design requirements, then the upper bridge deck units are assembled from the middle part to two sides in sequence, the assembled joints are welded in sequence, and finally the non-reference ends are scribed and cut;
s4: manufacturing a lower-layer bridge deck plate: the lower deck comprises a lower bridge deck unit, a lower T-shaped cross beam and a bottom plate unit; the lower bridge deck unit adopts a parallel process scheme of continuous matching assembly welding and trial assembly, namely 5 whole sections are assembled by each wheel set, and a section is left to be used as a female section of the next wheel to participate in assembly after the assembly of the previous wheel is completed; dividing and manufacturing the bottom plate unit according to designed parameters, and then laying and positioning the bottom plate unit on a jig frame; arranging a lower T-shaped cross beam on the bottom plate unit, temporarily positioning the lower T-shaped cross beam through the simulation chord members, mounting web plate units on two sides of the lower T-shaped cross beam, and assembling the heavy pressure area reinforcing ribs; dividing the lower bridge deck units according to the design process parameters of the lower bridge deck units, and finishing the manufacture of each lower bridge deck unit; assembling the lower bridge deck units from the middle part to the two sides in sequence, welding assembling seams in sequence at the same time, and finally scribing and cutting off the non-reference ends;
s5: wholly assembling the steel truss girder sections of the double-layer highway bridge surface: laying the finished lower deck on a jig frame and positioning; then, mounting a truss sheet on one side of the lower deck, and stabilizing the truss sheet through a tool; secondly, installing a truss sheet at the other side and assisting with a temporary fixing device; finally, assembling an upper layer bridge deck, and after the assembly is finished, detecting quality stop points, wherein the quality stop points comprise a horizontal surface angle difference, an upper bridge deck elevation and a main truss center distance, and scribing for secondarily cutting the length of the bridge deck; sequentially carrying out positioning of the lower deck, truss piece assembling on two sides and upper deck assembling; and after the assembly welding is finished, detecting quality stop points, including total length, lateral bending, truss width, diagonal difference and camber, disassembling and transferring the tire after the quality stop points are qualified, and leaving a mother section to participate in the next round of whole section assembly.
Further, in the integral assembly of the S5 double-layer highway bridge surface steel truss girder segment, the whole segment is assembled on a jig frame, the elevation of the jig frame is linearly arranged according to the camber, and the elevation is measured and adjusted every turn; temporary supporting and fixing devices are arranged on the jig frame to ensure stable and safe assembly and assembly precision; the three integral truss pieces of the same integral section have consistent truss height deviation directions and are within an allowable deviation range; and the central line matching deviation of each main truss rod piece on the construction site connecting section of the adjacent sections is controlled within the allowable deviation range of the manufacturing rule.
Further, in the assembly of the S1.3 truss sheets; the welding seams among the diagonal rods, the vertical rods and the nodes of the upper chord rod and the lower chord rod are divided into two times, namely, the side of the upper chord rod is welded firstly, and then the side of the lower chord rod is welded, so that the influence of partial welding shrinkage on the truss height is avoided.
Furthermore, in the assembly of the S1.3 truss sheets, the central line matching deviation of the upper chord member, the lower chord member and the diagonal web member of the adjacent whole sections is controlled to be less than or equal to +/-0.5 mm; the truss sheet is not turned over in the manufacturing process, the vertical plate below the truss sheet and the welding line of the gusset plate adopt asymmetric double-sided welding lines or single-sided welding lines, and the web plate of the box-shaped web member can be reserved with an embedding section, so that the welding construction space of the lower welding line is ensured.
It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are given by way of illustration of the principles of the present invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, and such changes and modifications are within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (4)
1. A manufacturing and assembling process for double-layer highway bridge deck steel truss girder segments is characterized in that: the specific manufacturing and assembling process comprises the following steps:
s1: manufacturing a truss sheet: the truss piece comprises an upper chord, a lower chord, an oblique rod and a vertical rod;
s1.1: manufacturing the upper chord: the upper chord comprises an upper horizontal plate, a lower horizontal plate, a gusset plate, a beam web joint plate, a beam flange joint plate and a vertical plate; blanking each plate unit through numerical control cutting, and finishing independent processing and finishing of each plate unit; the upper chord members are assembled in an inverted mode, the upper horizontal plate is placed on the jig frame, the partition plate and the vertical plate are sequentially assembled to form a groove shape, and after welding and trimming, the upper horizontal plate is assembled to form a box shape; drilling positioning holes of each hole group by using a double-gantry numerical control drilling machine for bolt holes of the upper chord member box body, and then drilling other bolt holes by using a small-sized mechanical sample plate;
s1.2: manufacturing the lower chord: cutting and blanking each plate unit of the lower chord according to the processing requirement, placing a lower horizontal plate of the lower chord on a jig frame, sequentially placing a partition plate of the lower chord on the lower horizontal plate of the lower chord, arranging vertical plate units on two sides of the partition plate to form a groove-shaped structure, and finishing; then assembling the upper horizontal plate of the lower chord to form a box shape; drilling positioning holes of each hole group by using a double-gantry numerical control drilling machine for the bolt holes of the lower chord member box body, and then drilling other bolt holes by using a small-sized mechanical sample plate;
s1.3: assembling truss pieces: the truss sheet assembly adopts a scheme of multi-section continuous matching assembly, namely each group is not less than 4 whole sections, and one section is left as a mother section of the next group to participate in the assembly after the assembly of the previous group is finished; placing the upper chord member and the lower chord member on an assembling jig frame to enable the upper chord member and the lower chord member to be in line with the camber, and adjusting the azimuth dimension to be in line with the standard requirement; after the detection is qualified, adopting a temporary positioning measure for positioning; sequentially assembling web members formed by the diagonal rods and the vertical rods, and matching the web members with a push pick when the web members are in place; after the sizes of all parts are detected to be qualified, welding of the welding seam is completed; detecting and recording after welding and trimming as a basis for reserving shrinkage of subsequent units; after the inspection is qualified, the single truss is disassembled into single truss pieces, and a section of the single truss piece is reserved to be used as a mother section of the next round to participate in assembly;
s2: manufacturing an upper layer bridge deck plate: the upper deck comprises an upper bridge deck unit and an upper T-shaped cross beam; dividing the bridge deck units according to the design process parameters of the upper bridge deck units, finishing the manufacture of each upper bridge deck unit, and then assembling the bridge deck units on a jig frame through simulated chords and auxiliary positioning; the upper T-shaped cross beams are laid on the jig frame in parallel according to the design requirements, then the upper bridge deck units are assembled from the middle part to two sides in sequence, the assembled joints are welded in sequence, and finally the non-reference ends are scribed and cut;
s4: manufacturing a lower-layer bridge deck plate: the lower deck comprises a lower bridge deck unit, a lower T-shaped cross beam and a bottom plate unit; the lower bridge deck unit adopts a parallel process scheme of continuous matching assembly welding and trial assembly, namely 5 whole sections are assembled by each wheel set, and a section is left to be used as a female section of the next wheel to participate in assembly after the assembly of the previous wheel is completed; dividing and manufacturing the bottom plate unit according to designed parameters, and then laying and positioning the bottom plate unit on a jig frame; arranging a lower T-shaped cross beam on the bottom plate unit, temporarily positioning the lower T-shaped cross beam through the simulation chord members, mounting web plate units on two sides of the lower T-shaped cross beam, and assembling the heavy pressure area reinforcing ribs; dividing the lower bridge deck units according to the design process parameters of the lower bridge deck units, and finishing the manufacture of each lower bridge deck unit; assembling the lower bridge deck units from the middle part to the two sides in sequence, welding assembling seams in sequence at the same time, and finally scribing and cutting off the non-reference ends;
s5: the integral assembly of the double-layer highway bridge surface steel truss girder sections: laying the finished lower deck on a jig frame and positioning; then, mounting a truss sheet on one side of the lower deck, and stabilizing the truss sheet through a tool; secondly, installing a truss sheet at the other side and assisting with a temporary fixing device; finally, assembling an upper layer bridge deck, and after the assembly is finished, detecting quality stop points, wherein the quality stop points comprise a horizontal surface angle difference, an upper bridge deck elevation and a main truss center distance, and scribing for secondarily cutting the length of the bridge deck; sequentially carrying out positioning of the lower deck, truss piece assembling on two sides and upper deck assembling; and after the assembly welding is finished, detecting quality stop points, including total length, lateral bending, truss width, diagonal difference and camber, disassembling and transferring the tire after the quality stop points are qualified, and leaving a mother section to participate in the next round of whole section assembly.
2. The process of claim 1 for manufacturing and assembling double deck steel truss girder sections, wherein: in the integral assembly of the S5 double-layer highway bridge deck steel truss girder segment, the whole segment is assembled on a jig frame, the elevation of the jig frame is linearly arranged according to the camber, and the elevation is measured and adjusted every turn; temporary supporting and fixing devices are arranged on the jig frame to ensure stable and safe assembly and assembly precision; the three integral truss pieces of the same integral section have consistent truss height deviation directions and are within an allowable deviation range; and the central line matching deviation of each main truss rod piece on the construction site connecting section of the adjacent sections is controlled within the allowable deviation range of the manufacturing rule.
3. The process of claim 1 for manufacturing and assembling double deck steel truss girder sections, wherein: s1.3, assembling the truss sheets; the welding seams among the diagonal rods, the vertical rods and the nodes of the upper chord rod and the lower chord rod are divided into two times, namely, the side of the upper chord rod is welded firstly, and then the side of the lower chord rod is welded, so that the influence of partial welding shrinkage on the truss height is avoided.
4. The process of claim 1 for manufacturing and assembling double deck steel truss girder sections, wherein: in the S1.3 truss piece assembly, the central line matching deviation of the upper chord member, the lower chord member and the diagonal web member of the whole adjacent section is controlled to be less than or equal to +/-0.5 mm; the truss sheet is not turned over in the manufacturing process, the vertical plate below the truss sheet and the welding line of the gusset plate adopt asymmetric double-sided welding lines or single-sided welding lines, and the web plate of the box-shaped web member can be reserved with an embedding section, so that the welding construction space of the lower welding line is ensured.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210436272.0A CN114808750A (en) | 2022-04-25 | 2022-04-25 | Manufacturing and assembling process for double-layer highway bridge deck steel truss girder segments |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210436272.0A CN114808750A (en) | 2022-04-25 | 2022-04-25 | Manufacturing and assembling process for double-layer highway bridge deck steel truss girder segments |
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| CN114808750A true CN114808750A (en) | 2022-07-29 |
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| CN202210436272.0A Pending CN114808750A (en) | 2022-04-25 | 2022-04-25 | Manufacturing and assembling process for double-layer highway bridge deck steel truss girder segments |
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