CN111648243A - Method for assembling large sections of bolted and welded combined steel truss girder - Google Patents
Method for assembling large sections of bolted and welded combined steel truss girder Download PDFInfo
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- CN111648243A CN111648243A CN202010380053.6A CN202010380053A CN111648243A CN 111648243 A CN111648243 A CN 111648243A CN 202010380053 A CN202010380053 A CN 202010380053A CN 111648243 A CN111648243 A CN 111648243A
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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
- E01D6/00—Truss-type bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/30—Metal
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Abstract
The invention relates to a method for assembling large sections of a bolt-welded combined steel truss girder, which is characterized by comprising the following steps of: the specific assembly method comprises the following steps: s1: assembling the truss sheets; s2: assembling an upper layer bridge deck; s3: assembling a lower bridge deck; s4: assembling the whole sections; 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.
Description
Technical Field
The invention relates to the technical field of steel structure bridge assembly, in particular to a method for assembling large sections of a bolt-welded combined steel truss girder.
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 method for splicing large sections of a bolt-welded combined steel truss girder, which can solve the problems of poor splicing precision and low overall splicing efficiency of the large sections of the common steel truss girder.
In order to solve the technical problems, the technical scheme of the invention is as follows: a method for splicing large sections of a bolt-welded combined steel truss girder has the innovation points that: the specific assembly method comprises the following steps:
s1: assembling truss pieces: the truss piece comprises an upper chord, a lower chord, an oblique rod and a vertical rod; 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;
s1.1: positioning the chord members: 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;
s1.2: 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;
s1.3: 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 an upper layer bridge deck: the upper deck comprises an upper bridge deck unit and an upper T-shaped cross beam; the upper bridge deck unit adopts a parallel process scheme of continuous matching assembly welding and trial assembly, namely 4 whole sections are assembled by each wheel set, and a section is left after the assembly of the previous wheel is finished and is used as a female section of the next wheel to participate in the assembly;
s2.1: manufacturing an upper bridge panel unit: 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;
s2.2: assembling the upper bridge panel unit: 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;
s3: assembling a lower bridge deck: 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;
s3.1: manufacturing and assembling a bottom plate unit: dividing and manufacturing the bottom plate unit according to designed parameters, and then laying and positioning the bottom plate unit on a jig frame;
s3.2: assembling a lower T-shaped beam: 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;
s3.3: manufacturing and assembling a lower bridge deck unit: 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;
s4: assembling the whole sections: laying the lower layer bridge deck finished by the S2 assembling method 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.
Furthermore, the web members are assembled in the S1.2, when welding seams among the web members, the upper chord member and the lower chord member are welded, the welding seams are divided into two times, namely the upper chord member side is welded firstly, and then the lower chord member side is welded, so that the influence of welding shrinkage on the truss height is avoided.
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 an overall structural view of a large section of a bolted and bonded steel truss according to the present invention.
Fig. 2 to 4 are views illustrating a process for assembling large-section truss pieces of a bolted steel truss girder according to the present invention.
Fig. 5 to 8 are diagrams illustrating the assembly process of the upper deck of the large section of the bolted and welded steel beam according to the invention.
Fig. 9 to 13 are diagrams illustrating the process of assembling the lower deck of the large section of the bolted and welded steel beam according to the 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.
As shown in fig. 1 to 13, a method for assembling large sections of a bolted and bonded steel truss girder specifically includes the following steps:
s1: assembling truss pieces: the truss piece comprises an upper chord, a lower chord, an oblique rod and a vertical rod; 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;
s1.1: positioning the chord members: 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;
s1.2: 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; when welding seams among the web members, the upper chord member and the lower chord member are welded, the welding is performed twice, namely the upper chord member side is welded firstly, and then the lower chord member side is welded, so that the influence of welding shrinkage on the truss height is avoided;
s1.3: 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 an upper layer bridge deck: the upper deck comprises an upper bridge deck unit and an upper T-shaped cross beam; the upper bridge deck unit adopts a parallel process scheme of continuous matching assembly welding and trial assembly, namely 4 whole sections are assembled by each wheel set, and a section is left after the assembly of the previous wheel is finished and is used as a female section of the next wheel to participate in the assembly;
s2.1: manufacturing an upper bridge panel unit: 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;
s2.2: assembling the upper bridge panel unit: 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;
s3: assembling a lower bridge deck: 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;
s3.1: manufacturing and assembling a bottom plate unit: dividing and manufacturing the bottom plate unit according to designed parameters, and then laying and positioning the bottom plate unit on a jig frame;
s3.2: assembling a lower T-shaped beam: 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;
s3.3: manufacturing and assembling a lower bridge deck unit: 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;
s4: assembling the whole sections: laying the lower layer bridge deck finished by the S2 assembling method 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.
It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (2)
1. A method for assembling large sections of a bolted and combined steel truss girder is characterized by comprising the following steps: the specific assembly method comprises the following steps:
s1: assembling truss pieces: the truss piece comprises an upper chord, a lower chord, an oblique rod and a vertical rod; 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;
s1.1: positioning the chord members: 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;
s1.2: 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;
s1.3: 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 an upper layer bridge deck: the upper deck comprises an upper bridge deck unit and an upper T-shaped cross beam; the upper bridge deck unit adopts a parallel process scheme of continuous matching assembly welding and trial assembly, namely 4 whole sections are assembled by each wheel set, and a section is left after the assembly of the previous wheel is finished and is used as a female section of the next wheel to participate in the assembly;
s2.1: manufacturing an upper bridge panel unit: 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;
s2.2: assembling the upper bridge panel unit: 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;
s3: assembling a lower bridge deck: 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;
s3.1: manufacturing and assembling a bottom plate unit: dividing and manufacturing the bottom plate unit according to designed parameters, and then laying and positioning the bottom plate unit on a jig frame;
s3.2: assembling a lower T-shaped beam: 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;
s3.3: manufacturing and assembling a lower bridge deck unit: 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;
s4: assembling the whole sections: laying the lower layer bridge deck finished by the S2 assembling method 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 method for assembling large sections of bolted and combined steel trussed beams according to claim 1, wherein the method comprises the following steps: and S1.2, the web members are assembled, and when welding seams among the web members, the upper chord members and the lower chord members are welded, the welding is performed twice, namely, the upper chord member side is welded firstly, and then the lower chord member side is welded, so that the influence of welding shrinkage on the truss height is avoided.
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| CN113585098A (en) * | 2021-09-28 | 2021-11-02 | 南通华川交通装备有限责任公司 | Construction method of steel structure bridge of super-large bridge |
| CN114808751A (en) * | 2022-04-25 | 2022-07-29 | 中铁山桥(南通)有限公司 | Whole section assembling process for steel truss girder of main channel bridge |
| CN114808750A (en) * | 2022-04-25 | 2022-07-29 | 中铁山桥(南通)有限公司 | Manufacturing and assembling process for double-layer highway bridge deck steel truss girder segments |
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Application publication date: 20200911 |
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