CN112853826A - Straddle type single-rail steel-concrete combined rail beam box type girder assembling method - Google Patents
Straddle type single-rail steel-concrete combined rail beam box type girder assembling method Download PDFInfo
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- CN112853826A CN112853826A CN202110048407.1A CN202110048407A CN112853826A CN 112853826 A CN112853826 A CN 112853826A CN 202110048407 A CN202110048407 A CN 202110048407A CN 112853826 A CN112853826 A CN 112853826A
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B25/00—Tracks for special kinds of railways
- E01B25/08—Tracks for mono-rails with centre of gravity of vehicle above the load-bearing rail
- E01B25/10—Mono-rails; Auxiliary balancing rails; Supports or connections for rails
Abstract
The invention discloses a straddle type single-rail steel-concrete combined track beam box type girder assembling method, which relates to the technical field of track traffic and comprises the following steps: s100, assembling the main beam by adopting a flip-chip method; s200, assembling and welding cross-linking and flat-linking head plates on the main beam; s300, assembling a bottom plate; s400, completing assembly and welding of the box body and correcting deformation of the top plate and the bottom plate extending out of the flange; and S500, completing the assembly welding of the stabilizing surface members. The invention provides a straddle type single-rail steel-concrete combined rail beam box type main beam assembling method which solves the problems of high beam structure manufacturing precision and difficult control of beam linearity in manufacturing a linear structure by adopting a reasonable assembling sequence and a reasonable assembling mode and by reasonably using measures such as the use of a preset camber and linear beam manufacturing jig, the drawing of a main plate positioning line, the flame correction of an inverted arch matched jack, the splicing mode of a 'reference end hole first method + non-reference end total splicing drill' and the like.
Description
Technical Field
The invention relates to the technical field of rail transit, in particular to a straddle type single-rail steel-concrete combined rail beam box type main beam assembling method.
Background
The track beam is a track and a bearing beam, the linear precision requirement of the straddle type monorail transit beam is very high due to the characteristic of 'beam-rail integration', and any error exceeding the limit can cause product scrapping and engineering loss. The construction of the track beam is easily influenced by the environmental conditions in each link, so the requirement on the quality control in the construction process is higher, and the quality control in each link is the basic guarantee for the smooth completion of the engineering.
The straddle type monorail transit simply-supported steel-concrete combined track beam has the advantages of large bearing capacity, relatively light self weight, reasonable material stress and larger spanning capacity, overcomes the defects of heavy structure and complicated construction process of a scheme of supporting a PC track beam on a concrete continuous beam, and simultaneously solves the problems of large steel consumption, large vibration noise and easy slippage between wheels and a beam body of the steel track beam scheme. In recent years, the amount of simple steel-concrete composite track beams used as a beam for crossing a special work point has also increased year by year.
However, at present, the manufacturing, installation and acceptance of the domestic single-rail simple-supported steel-concrete combination beam are all in the starting stage, a set of complete and acknowledged process flow is not provided for the processing and assembly manufacturing of the steel main beam, and the process methods adopted by various manufacturers are different, so that a novel straddle-type single-rail steel-concrete combination track beam box-type main beam assembling method is provided for better ensuring the manufacturing precision of the steel main beam and solving the problem that the beam linearity is difficult to control by technical personnel in the field. The novel assembly method is beneficial to promoting the wide application of the simply supported steel-concrete combination beam structure in straddle type monorail traffic, and has a promoting effect on the lightening of the straddle type monorail traffic.
Disclosure of Invention
In view of the above defects in the prior art, the technical problem to be solved by the present invention is to provide a novel straddle-type monorail steel-concrete combined track beam box girder assembling method. The novel assembly method is beneficial to promoting the wide application of the simply supported steel-concrete combination beam structure in straddle type monorail traffic, and has a promoting effect on the lightening of the straddle type monorail traffic.
In order to achieve the purpose, the invention provides a straddle type single-rail steel-concrete combined rail beam box type main beam assembling method which is characterized by comprising the following steps:
s100, assembling the main beam by adopting a flip-chip method;
s200, assembling and welding cross-linking and flat-linking head plates on the main beam;
s300, assembling a bottom plate;
s400, completing assembly and welding of the box body and correcting deformation of the top plate and the bottom plate extending out of the flange;
and S500, completing the assembly welding of the stabilizing surface members.
Further, step S100 further includes:
s101, processing a main beam on a jig frame which is specially designed and manufactured in consideration of beam body camber and line type, firstly, placing a top plate on the jig frame as a bottom plate, drawing a top plate central line, and drawing web positioning lines to two sides by taking the top plate central line as a reference; drawing the positioning lines of the partition plates on the top plate according to a drawing, wherein the method comprises the steps of taking a machining allowance line with the end of the plate flush of 3-5 mm as a reference, and lofting and drawing all the positioning lines of the partition plates towards the other end;
s102, drawing a web plate central line on a web plate, positioning web plate side lines to two sides by taking the web plate central line as a reference, and trimming the side lines; drawing all partition plate positioning lines to the lofting of the other end by taking the plate end flush of 3-5 mm as a reference;
s103, placing the top plate with the positioning lines drawn on an assembly jig frame, wherein the jig frame is preset with camber, so that the vertical surface line of the top plate is naturally formed, positioning the prepared partition plate on the partition plate positioning line on the top plate, and checking the verticality of the partition plate, wherein the verticality of the partition plate and the top plate is less than or equal to 2 mm;
s104, assembling the webs at the two sides, aligning the positions of the partition positioning lines drawn on the webs with the partition side lines, aligning the lower lines of the webs with the web positioning lines drawn on the top plate, enabling the perpendicularity of the webs and the top plate to be less than or equal to 2mm, and then positioning and fixing the webs and the partitions, and the webs and the top plate.
Further, the partition plate prepared in step S103 is positioned to the top plate by adopting a gas shielded welding intermittent weld welding mode, wherein the length of the weld is 20-30mm, and the distance is 400-450 mm.
Further, in step S104, the positioning and fixing manner between the web and the partition plate and between the web and the top plate is gas shield welding intermittent weld seam welding.
Further, the step 300 further includes: respectively aligning a web plate positioning line and a partition plate positioning line drawn on the bottom plate to a web plate side line and a partition plate side line; the bottom plate and the lower edge line of the partition plate are not welded, but the bottom plate and the lower edge line of the partition plate are tightly attached, and the requirements of polishing, jacking or fusion penetration welding at the lower edge position of the supporting rib are met according to design requirements.
Further, step S400 includes: if the top plate and the bottom plate extend out of the flange and are deformed by welding, a semi-automatic flame cutting machine can be used for carrying out flame heating correction on the extending flange; when the length of the extending flange is shorter, the extending flange can be reversely deformed by heating the back surface of the extending flange before welding so as to facilitate correction; if necessary, a jack can be used to match with flame to heat and arch.
Further, step S500 further includes: when the assembly welding of the stabilizing surface component is completed, the straightness and the verticality of the stabilizing surface component need to be ensured.
Technical effects
The invention provides a straddle type single-rail steel-concrete combined rail beam box type main beam assembling method which solves the problems of high beam structure manufacturing precision and difficult control of beam linearity in manufacturing a linear structure by adopting a reasonable assembling sequence and a reasonable assembling mode and by reasonably using measures such as the use of a preset camber and linear beam manufacturing jig, the drawing of a main plate positioning line, the flame correction of an inverted arch matched jack, the splicing mode of a 'reference end hole first method + non-reference end total splicing drill' and the like.
The novel assembly process is beneficial to promoting the wide application of the simply supported steel-concrete combination beam structure in straddle type monorail traffic, and has a promoting effect on the lightening of the straddle type monorail traffic.
The conception, the specific structure and the technical effects of the present invention will be further described with reference to the accompanying drawings to fully understand the objects, the features and the effects of the present invention.
Drawings
FIG. 1 is a schematic view of the positioning of the top plate of the girder assembly according to a preferred embodiment of the present invention;
FIG. 2 is a schematic illustration of the positioning of the spar assembly webs in accordance with a preferred embodiment of the present invention;
FIG. 3 is a schematic view of a spacer assembly according to a preferred embodiment of the present invention;
FIG. 4 is a schematic illustration of the web assembly of a preferred embodiment of the present invention;
FIG. 5 is a schematic view of a weld distortion correction of a preferred embodiment of the present invention;
FIG. 6 is a schematic view of the segment joint splice assembly of a preferred embodiment of the present invention.
Detailed Description
The technical contents of the preferred embodiments of the present invention will be more clearly and easily understood by referring to the drawings attached to the specification. The present invention may be embodied in many different forms of embodiments and the scope of the invention is not limited to the embodiments set forth herein.
In the drawings, structurally identical elements are represented by like reference numerals, and structurally or functionally similar elements are represented by like reference numerals throughout the several views. The size and thickness of each component shown in the drawings are arbitrarily illustrated, and the present invention is not limited to the size and thickness of each component. The thickness of the components may be exaggerated where appropriate in the figures to improve clarity.
The invention provides a straddle type single-rail steel-concrete combined track beam box type girder assembling method which is characterized by comprising the following steps of:
s100, assembling the main beam by adopting a flip-chip method;
s200, assembling and welding cross-linking and flat-linking head plates on the main beam;
s300, assembling a bottom plate;
s400, completing assembly and welding of the box body and correcting deformation of the top plate and the bottom plate extending out of the flange;
and S500, completing the assembly welding of the stabilizing surface members.
In a preferred embodiment, step S100 further includes:
s101, processing a main beam on a jig frame which is specially designed and manufactured in consideration of beam body camber and line type, firstly, placing a top plate on the jig frame as a bottom plate, drawing a top plate central line, and drawing web positioning lines to two sides by taking the top plate central line as a reference; drawing the positioning lines of the partition plates on the top plate according to a drawing, wherein the method comprises the steps of taking a machining allowance line with the end of the plate flush of 3-5 mm as a reference, and lofting and drawing all the positioning lines of the partition plates towards the other end;
s102, drawing a web plate central line on a web plate, positioning web plate side lines to two sides by taking the web plate central line as a reference, and trimming the side lines; drawing all partition plate positioning lines to the lofting of the other end by taking the plate end flush of 3-5 mm as a reference;
s103, placing the top plate with the positioning lines drawn on an assembly jig frame, wherein the jig frame is preset with camber, so that the vertical surface line of the top plate is naturally formed, positioning the prepared partition plate on the partition plate positioning line on the top plate, and checking the verticality of the partition plate, wherein the verticality of the partition plate and the top plate is less than or equal to 2 mm;
s104, assembling the webs at the two sides, aligning the positions of the partition positioning lines drawn on the webs with the partition side lines, aligning the lower lines of the webs with the web positioning lines drawn on the top plate, enabling the perpendicularity of the webs and the top plate to be less than or equal to 2mm, and then positioning and fixing the webs and the partitions, and the webs and the top plate.
In a preferred embodiment, the partition prepared in step S103 is positioned on the top plate by intermittent welding with gas shielded welding, wherein the welding length is 20-30mm and the distance is 400-450 mm.
In a preferred embodiment, the positioning and fixing manner between the web and the partition plate and between the web and the top plate in step S104 is gas shield welding intermittent weld seam welding.
In a preferred embodiment, the step 300 further comprises: respectively aligning a web plate positioning line and a partition plate positioning line drawn on the bottom plate to a web plate side line and a partition plate side line; the bottom plate and the lower edge line of the partition plate are not welded, but the bottom plate and the lower edge line of the partition plate are tightly attached, and the requirements of polishing, jacking or fusion penetration welding at the lower edge position of the supporting rib are met according to design requirements.
In a preferred embodiment, step S400 includes: if the top plate and the bottom plate extend out of the flange and are deformed by welding, a semi-automatic flame cutting machine can be used for carrying out flame heating correction on the extending flange; when the length of the extending flange is shorter, the extending flange can be reversely deformed by heating the back surface of the extending flange before welding so as to facilitate correction; if necessary, a jack can be used to match with flame to heat and arch.
In a preferred embodiment, step S500 further includes: when the assembly welding of the stabilizing surface component is completed, the straightness and the verticality of the stabilizing surface component need to be ensured.
The invention provides a straddle type single-rail steel-concrete combined rail beam box type main beam assembling method which solves the problems of high beam structure manufacturing precision and difficult control of beam linearity in manufacturing a linear structure by adopting a reasonable assembling sequence and a reasonable assembling mode and by reasonably using measures such as the use of a preset camber and linear beam manufacturing jig, the drawing of a main plate positioning line, the flame correction of an inverted arch matched jack, the splicing mode of a 'reference end hole first method + non-reference end total splicing drill' and the like.
The novel assembling method provided by the invention is beneficial to promoting the wide application of the simply supported steel-concrete combination beam structure in straddle type monorail traffic, and has a promoting effect on the lightening of the straddle type monorail traffic. The embodiments of the present invention will be specifically described below with reference to the drawings attached to the specification.
As shown in fig. 1, a schematic diagram of positioning a top plate in assembling a main beam according to a preferred embodiment of the present invention is shown, in the present invention, the main beam is assembled by a flip-chip method, and the main beam is processed on a jig frame which is specially designed and manufactured in consideration of the camber and the line type of a beam body, first, the top plate is placed on the jig frame as a bottom plate, a center line of the top plate is drawn, and web positioning lines are drawn to both sides with the center line of the top plate as a reference; and drawing the positioning lines of the partition plates on the top plate according to a drawing, wherein the method is characterized in that all the positioning lines of the partition plates are drawn towards the other end of the top plate by lofting on the basis of a machining allowance line with the end of the top plate flush being 3-5 mm.
As shown in fig. 2, which is a schematic view illustrating the positioning of a web plate in the assembling of a main girder according to a preferred embodiment of the present invention, a center line of the web plate is drawn on the web plate, and the edge lines of the web plate are positioned to both sides and trimmed by using the center line of the web plate as a reference; and taking the machining allowance of 3-5 mm of the flush end of the web plate as a reference, and lofting the other end to draw all partition plate positioning lines.
As shown in fig. 3, which is a schematic diagram of the assembly of the partition board according to a preferred embodiment of the present invention, the top board with the positioning lines drawn thereon is placed on the assembly jig frame, the vertical surface line of the top board is naturally formed due to the preset camber of the jig frame, the prepared partition board is positioned on the positioning lines of the partition board on the top board, the verticality of the partition board is checked, and the verticality of the partition board to the top board is not greater than 2 mm. The mode that the prepared partition plate is positioned to the top plate is a gas shielded welding intermittent weld joint welding mode, wherein the length of a weld joint is 20-30mm, and the distance is 400-450 mm.
As shown in fig. 4, which is a schematic diagram of assembling a web plate according to a preferred embodiment of the present invention, the web plates at two sides are assembled, so that the positions of the partition plate positioning lines drawn on the web plates are aligned with the side lines of the partition plates, the lower lines of the web plates are aligned with the web plate positioning lines drawn on the top plate, the perpendicularity between the web plates and the top plate is less than or equal to 2mm, and then the web plates and the partition plates, and the web plates and the top.
The method solves the problem of basic linear positioning of planes and facades of the beam body by adopting a flip-chip method and presetting the camber and the linear of the beam body on a specially designed and manufactured jig frame.
The assembling process of the main beam is completed by adopting a flip-chip method, and after the top plate, the partition plate and the web plate are assembled, the transverse connection joint plate and the flat connection joint plate on the main beam are assembled and welded.
Assembling the bottom plate after the assembly is finished, and respectively aligning a web plate positioning line and a partition plate positioning line drawn on the bottom plate to a web plate side line and a partition plate side line; the bottom plate and the lower edge line of the partition plate are not welded, but the bottom plate and the lower edge line of the partition plate are tightly attached, and the requirements of polishing, jacking or fusion penetration welding at the lower edge position of the supporting rib are met according to design requirements.
As shown in fig. 5, a schematic diagram of welding distortion correction according to a preferred embodiment of the present invention, after the assembly and welding of the box body are completed, if the top and bottom plate extending flanges have welding distortion, a semi-automatic flame cutting machine may be used to perform flame heating correction on the extending flanges; when the length of the extending flange is shorter, the extending flange can be reversely deformed by heating the back surface of the extending flange before welding so as to be beneficial to correction; if necessary, a jack can be used to match with flame to heat and arch.
After the deformation correction of the extending flange is finished, the assembly welding of the stable surface components is carried out, and the straightness and the verticality of the stable surface components are guaranteed.
Fig. 6 is a schematic diagram illustrating the splicing and assembling of the segment joints according to a preferred embodiment of the present invention, in which one side of the splicing joint of the longitudinal segment of the main beam, the splicing joint of the main beam and the cross beam, and the splicing joint of the main beam and the parallel connection are used as a reference end, the other side of the splicing joint is used as a non-reference end, a hole group of the reference end is drilled by a first drilling method, that is, after the blanking of the unit piece is completed, the non-reference end is drilled in a matched manner by using the hole group of the reference end as a reference during the total splicing, and the splicing precision of the beam body is ensured by using the splicing joint in a manner of.
Because the general baffle of track roof beam structure is high wide than big, when the baffle was made the welding stiffening rib, in order to prevent that the baffle web from being heated and producing wave deformation, need carry out rigid fixation to the baffle edge. When the diaphragm unit is manufactured, the width of the diaphragm unit is subjected to negative tolerance, and the problem that the diaphragm web is heated to generate wave deformation when a stiffening rib of the diaphragm with a large height-width ratio is welded is avoided by providing a requirement for rigid fixation of the edge of the diaphragm for manufacturing the diaphragm unit.
The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.
Claims (7)
1. A straddle-type single-rail steel-concrete combined rail beam box girder assembling method is characterized by comprising the following steps:
s100, assembling the main beam by adopting a flip-chip method;
s200, assembling and welding cross-linking and flat-linking head plates on the main beam;
s300, assembling a bottom plate;
s400, completing assembly and welding of the box body and correcting deformation of the top plate and the bottom plate extending out of the flange;
and S500, completing the assembly welding of the stabilizing surface members.
2. The method of claim 1, wherein step S100 further comprises:
s101, processing a main beam on a jig frame which is specially designed and manufactured in consideration of beam body camber and line type, firstly, placing a top plate on the jig frame as a bottom plate, drawing a central line of the top plate, and drawing web positioning lines to two sides by taking the central line of the top plate as a reference; drawing positioning lines of the partition plates on the top plate, wherein the method is that all the partition plate positioning lines are drawn towards the other end of the top plate by lofting on the basis of a machining allowance line with the flush end of the top plate being 3-5 mm;
s102, drawing a web plate central line on the web plate, positioning web plate side lines to two sides by taking the web plate central line as a reference, and trimming the side lines; taking a machining allowance line of 3-5 mm of the flush end of the web plate as a reference, and lofting the other end to draw all partition plate positioning lines;
s103, the top plate with the positioning lines drawn is placed on an assembly jig frame, the jig frame is preset with camber, so that the vertical surface line of the top plate is naturally formed, the prepared partition plate is positioned at the partition plate positioning line on the top plate, the verticality of the partition plate is checked, and the verticality of the partition plate and the top plate is less than or equal to 2 mm;
s104, assembling the webs on the two sides, aligning the positions of the partition positioning lines drawn on the webs with the partition side lines and aligning the lower edge lines of the webs with the web positioning lines drawn on the top plate, wherein the perpendicularity between the webs and the top plate is less than or equal to 2mm, and then positioning and fixing the webs and the partitions, and the webs and the top plate.
3. The method as set forth in claim 2, wherein the partition prepared in step S103 is positioned to the top plate in a manner of intermittent bead welding by gas shield welding, wherein the bead length is 20-30mm and the interval is 400-450 mm.
4. The method of claim 2, wherein the positioning and fixing manner between the web and the partition plate and between the web and the top plate in the step S104 is gas shielded welding intermittent weld welding.
5. The method of claim 1, wherein the step 300 further comprises: respectively aligning a web plate positioning line and a partition plate positioning line drawn on the bottom plate to a web plate side line and a partition plate side line; the bottom plate and the lower side line of the partition plate are not welded, but the bottom plate and the lower side line of the partition plate are tightly attached to each other, and the requirements of polishing, jacking or fusion penetration welding of the lower edge position of the supporting rib are met according to design requirements.
6. The method of claim 1, wherein step S400 comprises: if the top plate and the bottom plate extend out of the flange and are deformed in welding, a semi-automatic flame cutting machine can be used for carrying out flame heating correction on the extending flange; when the length of the extending flange is shorter, the extending flange can be reversely deformed by heating the back surface of the extending flange before welding so as to facilitate correction; or a jack is adopted to match with flame to heat and arch.
7. The method of claim 1, wherein step S500 further comprises: when the assembly welding of the stabilizing surface component is completed, the straightness and the verticality of the stabilizing surface component need to be ensured.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114227045A (en) * | 2021-12-23 | 2022-03-25 | 中铁九桥工程有限公司 | Anti-deformation structure and anti-deformation method of steel truss girder chord member node plate |
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