CN114808751A - Whole section assembling process for steel truss girder of main channel bridge - Google Patents
Whole section assembling process for steel truss girder of main channel bridge Download PDFInfo
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- CN114808751A CN114808751A CN202210436284.3A CN202210436284A CN114808751A CN 114808751 A CN114808751 A CN 114808751A CN 202210436284 A CN202210436284 A CN 202210436284A CN 114808751 A CN114808751 A CN 114808751A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 46
- 239000010959 steel Substances 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000003466 welding Methods 0.000 claims description 68
- 238000010276 construction Methods 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 238000005192 partition Methods 0.000 claims description 6
- 238000012544 monitoring process Methods 0.000 claims description 3
- 238000003908 quality control method Methods 0.000 claims description 3
- 238000009434 installation Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009966 trimming 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
- 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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- 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
- 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
- E01D6/00—Truss-type bridges
-
- 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
- E01D2101/34—Metal non-ferrous, e.g. aluminium
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention relates to a whole section assembling process of a steel truss girder of a main channel bridge, which is characterized by comprising the following steps of: the specific assembly process is as follows: s1: assembling the truss sheets; s2: assembling steel bridge deck boards of the upper layer of the highway; s3: assembling the lower-layer railway steel box bridge deck; s4: assembling the whole sections; by adopting a continuous assembly mode, the truss sheets, the upper deck and the lower deck are independently installed by adopting multiple wheels, and a section of truss sheet is left to participate in installation as a female section of the 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.
Description
Technical Field
The invention relates to the field of steel trussed beams, in particular to a whole section assembling process of a steel trussed beam of a main channel bridge.
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 the bolt connection when the parts are assembled on the construction site, and therefore, the parts are necessary to be assembled in advance 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 three-dimensional assembly workload is large and the period is long.
Disclosure of Invention
The invention aims to solve the technical problem of providing a whole section assembling process of a main channel bridge steel truss girder, which can solve the problems of poor whole section assembling precision and low assembling efficiency of the general main channel bridge steel truss girder.
In order to solve the technical problems, the technical scheme of the invention is as follows: a whole section assembling process for a steel truss girder of a main channel bridge has the innovation points that: the specific assembly process is as follows:
s1: assembling truss sheets: the truss sheet assembly adopts a scheme of multi-section continuous matching assembly, namely a scheme of simultaneously carrying out truss sheet assembly and trial assembly, each round is required to be not less than 4 whole sections, and a section is left to be used as a parent section of the next round to participate in assembly after the last round of assembly is finished; the assembly sequence is positioning the upper chord member and the lower chord member → assembling the web members → welding seams between the welding web members and the upper chord nodes → welding seams between the welding web members and the lower chord nodes;
s2: assembling steel bridge deck boards of the upper layer of the highway: splicing the second bridge deck unit and the first bridge deck unit, and temporarily positioning the cross beam on the jig frame; mounting bridge deck units on the cross beams, assembling the bridge deck units from the middle part to two sides in sequence, welding the joints of the bridge deck units, assembling single rings of the bridge deck at the middle parts of adjacent sections, and finally welding the single rings according to the sequence of longitudinal joints, transverse joints and other joints;
s3: assembling the bridge deck of the lower railway steel box: welding two steel box bridge plate units into one piece on a special jig frame for splicing two pieces into one piece; laying a bottom plate on the jig frame from the middle to two sides, welding longitudinal seams firstly, and then welding transverse seams; assembling a cross beam on the bottom plate, and positioning by using a simulated tire positioning device; inserting the railway longitudinal beam into the partition plate, temporarily disconnecting the railway longitudinal beam, welding the railway longitudinal beam with the partition plate after the railway longitudinal beam is welded with the top plate, and then positioning the middle top plate unit; splicing the middle top plate, assembling the two side top plates, welding longitudinal joints, welding transverse joints, and welding the welding seams of the cross beam and the top bottom plate;
s4: assembling the whole sections: the whole section assembly adopts a multi-section continuous matching assembly and welding scheme, the first section is carried out according to the process sequence of one side railway steel box bridge floor in place → middle truss piece assembly → other side railway steel box bridge floor assembly → two side truss piece assembly → transverse connection piece assembly → upper layer highway bridge floor plate assembly, the subsequent whole section is sequentially pushed according to the process sequence of middle truss piece assembly → two side railway steel box bridge floor assembly → two side truss piece assembly → transverse connection piece assembly → upper layer highway bridge floor plate assembly, and the quality control points are arranged three times in the whole section assembly process, so that the omnibearing assembly monitoring is realized.
Furthermore, in the S1 truss piece assembly, the central line matching deviation of the upper chord member, the lower chord member and the diagonal web members 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.
Further, in the assembly of the whole segment of S4: the whole segments are 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.
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.
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 whole section assembling process of the main channel bridge steel truss girder.
Fig. 2 is a schematic diagram of the truss piece assembling state of the whole section assembling process of the main channel bridge steel truss girder.
FIG. 3 is an assembly state diagram of the upper layer highway steel bridge deck plate of the main channel bridge steel truss girder whole section assembly process of the invention.
FIG. 4 is a diagram of the assembling state of the lower-layer railway steel box bridge deck slab of the whole-segment assembling process of the main channel bridge steel truss girder.
FIG. 5 is a state diagram of the whole section assembling process of the main channel bridge steel truss girder.
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 whole section assembling process of the steel truss girder of the main channel bridge as shown in fig. 1 to 5 comprises the following specific assembling processes:
s1: assembling truss pieces: the truss sheet assembly adopts a scheme of multi-section continuous matching assembly, namely a scheme of simultaneously carrying out truss sheet assembly and trial assembly, each round is required to be not less than 4 whole sections, and a section is left to be used as a parent section of the next round to participate in assembly after the last round of assembly is finished; the assembly sequence is positioning the upper chord member and the lower chord member → assembling the web members → welding the welding seams between the welding web members and the upper chord nodes → welding the welding seams between the welding web members and the lower chord nodes.
S1.1: the assembly jig frame is arranged: arranging positioning piers, reserving welding shrinkage between the positioning piers, and taking out the connecting punch nails before welding; setting longitudinal and transverse base lines and reference points on a jig frame to ensure the dimensions of each part; after the truss sheet is fed into the tire in each round, the tire frame is detected again, detection records are made, and assembly in the next round can be carried out after the truss sheet is qualified;
s1.2: positioning the chord members: placing the upper chord member and the lower chord member on the assembling jig frame to enable the upper chord member and the lower chord member to be in line with the camber, and adjusting the sizes of all the azimuth to be in line with the standard requirements; after the detection is qualified, adopting a temporary positioning measure for positioning;
s1.3: assembling the web members: 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;
s1.4: detection and disintegration: 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: assembling steel bridge deck boards of the upper layer of the highway: splicing the second bridge deck unit and the first bridge deck unit, and temporarily positioning the cross beam on the jig frame; mounting bridge deck units on the cross beams, assembling the bridge deck units from the middle part to two sides in sequence, welding the joints of the bridge deck units, assembling single rings of the bridge deck at the middle parts of adjacent sections, and finally welding the single rings according to the sequence of longitudinal joints, transverse joints and other joints;
s3: assembling the bridge deck of the lower railway steel box: welding two steel box bridge plate units into one piece on a special jig frame for splicing two pieces into one piece; laying a bottom plate on the jig frame from the middle to two sides, welding longitudinal seams firstly, and then welding transverse seams; assembling a cross beam on the bottom plate, and positioning by using a simulated tire positioning device; inserting the railway longitudinal beam into the partition plate, temporarily disconnecting the railway longitudinal beam, welding the railway longitudinal beam with the partition plate after the railway longitudinal beam is welded with the top plate, and then positioning the middle top plate unit; splicing the middle top plate, assembling the two side top plates, welding longitudinal joints, welding transverse joints, and welding the welding seams of the cross beam and the top bottom plate;
s4: assembling the whole sections: the whole section assembly adopts a multi-section continuous matching assembly and welding scheme, the first section is carried out according to the process sequence of one side railway steel box bridge deck in place → middle truss piece assembly → the other side railway steel box bridge deck assembly → two side truss piece assembly → transverse connection piece assembly → upper layer highway bridge deck plate assembly, the subsequent whole section is sequentially pushed according to the process sequence of middle truss piece assembly → two side railway steel box bridge deck assembly → two side truss piece assembly → transverse connection piece assembly → upper layer highway bridge deck plate assembly, and three quality control points are arranged in the whole section assembly process, so that the omnibearing assembly monitoring is realized;
s4.1: positioning a lower layer railway steel box bridge floor on one side of the jig frame; installing a middle truss sheet, adopting a temporary positioning measure and assisting a tool to stabilize; installing a lower railway steel box bridge floor on the other side, adopting a temporary positioning measure and assisting a tool to stabilize; installing two pieces of side girders and assisting with a temporary fixing device, and paying attention to control the verticality of the girder pieces, wherein the geometric size deviation of the three pieces of girders needs to be matched; the transverse connection sheet body is installed and is assisted with a temporary positioning measure. After assembly is completed, detecting quality stop points including the center distance of the main girders and the diagonal difference of the cross section, and performing next assembly after the main girders are qualified; assembling upper-layer plates on two sides, after the assembly is finished, detecting a quality stop point, wherein the quality stop point comprises a horizontal surface angle difference, an upper bridge deck elevation and a main girder center distance, and scribing for secondary cutting of the length of the bridge deck; sequentially assembling subsequent whole sections according to the sequence of the middle truss sheet → the lower layer steel box bridge floor → the side trusses on the two sides → the transverse connection sheet → the upper layer bridge floor plate; 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.
S1, in the 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 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.
S4 in the whole-segment assembly: assembling the whole segments on a jig frame, arranging the elevation of the jig frame according to the camber line shape, and measuring and adjusting the elevation in each 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.
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 (3)
1. A whole section assembling process for a steel truss girder of a main channel bridge is characterized by comprising the following steps: the specific assembly process is as follows:
s1: assembling truss pieces: the truss sheet assembly adopts a scheme of multi-section continuous matching assembly, namely a scheme of simultaneously carrying out truss sheet assembly and trial assembly, each round is required to be not less than 4 whole sections, and a section is left to be used as a parent section of the next round to participate in assembly after the last round of assembly is finished; the assembly sequence is positioning the upper chord member and the lower chord member → assembling the web members → welding seams between the welding web members and the upper chord nodes → welding seams between the welding web members and the lower chord nodes;
s2: assembling steel bridge deck boards of the upper layer of the highway: splicing the second bridge deck unit and the first bridge deck unit, and temporarily positioning the cross beam on the jig frame; mounting bridge deck units on the cross beams, assembling the bridge deck units from the middle part to two sides in sequence, welding the joints of the bridge deck units, assembling single rings of the bridge deck at the middle parts of adjacent sections, and finally welding the single rings according to the sequence of longitudinal joints, transverse joints and other joints;
s3: assembling the bridge deck of the lower railway steel box: welding two steel box bridge plate units into one piece on a special jig frame for splicing two pieces into one piece; laying a bottom plate on the jig frame from the middle to two sides, welding longitudinal seams firstly, and then welding transverse seams; assembling a cross beam on the bottom plate, and positioning by using a simulated tire positioning device; inserting the railway longitudinal beam into the partition plate, temporarily disconnecting the railway longitudinal beam, welding the railway longitudinal beam with the partition plate after the railway longitudinal beam is welded with the top plate, and then positioning the middle top plate unit; splicing the middle top plate, assembling the two side top plates, welding longitudinal joints, welding transverse joints, and welding the welding seams of the cross beam and the top bottom plate;
s4: assembling the whole sections: the whole section assembly adopts a multi-section continuous matching assembly and welding scheme, the first section is carried out according to the process sequence of one side railway steel box bridge floor in place → middle truss piece assembly → other side railway steel box bridge floor assembly → two side truss piece assembly → transverse connection piece assembly → upper layer highway bridge floor plate assembly, the subsequent whole section is sequentially pushed according to the process sequence of middle truss piece assembly → two side railway steel box bridge floor assembly → two side truss piece assembly → transverse connection piece assembly → upper layer highway bridge floor plate assembly, and the quality control points are arranged three times in the whole section assembly process, so that the omnibearing assembly monitoring is realized.
2. The main channel bridge steel box girder whole-section assembling process according to claim 1, characterized in that: in the S1 truss piece assembly, the central line matching deviation of the upper chord member, the lower chord member and the diagonal web members 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.
3. The main channel bridge steel box girder whole-section assembling process according to claim 1, characterized in that: s4 in the whole-segment assembly: the whole segments are 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.
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| CN202210436284.3A CN114808751A (en) | 2022-04-25 | 2022-04-25 | Whole section assembling process for steel truss girder of main channel bridge |
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| CN202210436284.3A CN114808751A (en) | 2022-04-25 | 2022-04-25 | Whole section assembling process for steel truss girder of main channel bridge |
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| CN114134796A (en) * | 2021-11-26 | 2022-03-04 | 中铁宝桥（扬州）有限公司 | Stress-free manufacturing method for oversized section of steel truss girder bridge |
-
2022
- 2022-04-25 CN CN202210436284.3A patent/CN114808751A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017069313A1 (en) * | 2015-10-21 | 2017-04-27 | 한국철도기술연구원 | Method for launching/constructing bridge using assembly of precast bottom plate and concrete-filled steel tube truss girder |
| CN105735129A (en) * | 2016-02-26 | 2016-07-06 | 江苏中铁山桥重工有限公司 | Full-welding truss section modularized splicing method |
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