CN113565259B - Machining process for cantilever section of steel box girder of circular arc cantilever landscape platform - Google Patents
Machining process for cantilever section of steel box girder of circular arc cantilever landscape platform Download PDFInfo
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- CN113565259B CN113565259B CN202110946011.9A CN202110946011A CN113565259B CN 113565259 B CN113565259 B CN 113565259B CN 202110946011 A CN202110946011 A CN 202110946011A CN 113565259 B CN113565259 B CN 113565259B
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
- E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
- E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
- E04C2003/0404—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects
- E04C2003/0408—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by assembly or the cross-section
- E04C2003/0413—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by assembly or the cross-section being built up from several parts
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
- E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
- E04C2003/0404—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects
- E04C2003/0443—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by substantial shape of the cross-section
- E04C2003/0465—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by substantial shape of the cross-section square- or rectangular-shaped
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- Mechanical Engineering (AREA)
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- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The invention relates to a processing technology of a cantilever section of a steel box girder of an arc cantilever landscape platform, which is characterized by comprising the following steps of: the specific method comprises the following steps: s1: processing the cantilever top plate; s2: assembling the diaphragm plate; s3: assembling the wall plates; s4: assembling the side plate stiffening ribs; s5: hoisting the side plates; s6: assembling the bottom plate unit; s7: assembling and welding a leveling plate; s8: mounting lifting lugs and side plate stiffening ribs; according to the invention, the overhanging sections of the steel box girder are spliced and assembled in an integral welding mode, compared with a sectional type welding structure, the processing technology can meet the requirement of the supporting strength of the overhanging sections of the steel box girder, meanwhile, the welding procedures among all sections are reduced, and the phenomenon that the integral strength is reduced due to multiple welding is avoided; in addition, each part of the steel box girder overhanging section can be simultaneously blanked according to the size, and the steel box girder overhanging section can be directly welded in a coordinated manner according to the set procedure during subsequent assembly welding, so that the welding time is shortened, and the forming efficiency of the whole overhanging section is improved.
Description
Technical Field
The invention relates to the technical field of steel box girder overhanging section processing, in particular to a circular arc overhanging landscape platform steel box girder
And (5) processing a cantilever section.
Background
The overhanging landscape platform steel box girder is formed by splicing a plurality of steel box girder overhanging structures. According to the technical characteristic requirements of construction of the overhanging landscape platform steel box girder, a steel box girder overhanging structure is generally required to be divided into a plurality of sections (at least one overhanging section of the steel box girder and at least one section of the steel box girder) to be processed in a factory, and then the sections are transported to a construction site to be hoisted. The concrete assembling process of the steel box girder cantilever arm structure is as follows: firstly, the steel box girder segment is placed at a preset position, then the overhanging segment of the steel box girder is butted with the steel box girder segment, and then the steel box girder segment is welded at the butted position. This kind of sectional type structure leads to overall strength greatly reduced, consequently, needs the steel box girder of an integral welding equipment section structure of encorbelmenting to satisfy the support intensity requirement of viewing platform.
Disclosure of Invention
The invention aims to solve the technical problem of providing a processing technology for an overhanging section of a steel box girder of an arc overhanging landscape platform, which can solve the problems of multiple assembly welding processes and low structural strength caused by the adoption of a split structure of the overhanging section of the steel box girder of a general landscape platform.
In order to solve the technical problems, the technical scheme of the invention is as follows: the utility model provides a section processing technology is encorbelmented to landscape platform steel box girder that encorbelments, its innovation point lies in: the specific method comprises the following steps:
s1: and (3) processing of the cantilever top plate: placing the cantilever top plate on a horizontal jig frame to weld and install the long stiffening plate along the direction vertical to the width, when the length of the long stiffening plate is more than or equal to 5m, adding 1 per mill of welding shrinkage allowance in the length direction to perform blanking, blanking the arc end of the cantilever top plate in the width direction according to the size, adding 20mm of welding shrinkage allowance at the straight end, and then hanging the cantilever top plate on an assembly jig frame to perform positioning;
s2: assembling the diaphragm plate: manufacturing the diaphragm plate in advance, and prefabricating stiffening ribs and stiffening rings on the diaphragm plate; welding stiffening ribs on two sides of the diaphragm plate, and welding stiffening rings at the positions of the round holes; three groups of transverse clapboards are adopted to be vertical to the cantilever top plate and are welded along the width direction of the cantilever top plate; double-sided fillet welds are formed among the stiffening ribs, the stiffening rings and the diaphragm plates, and double-sided fillet welds are formed among the diaphragm plates and the cantilever top plate; a support stiffening plate is welded on the diaphragm plate in the middle position, and a penetration weld in a unit 40-degree root 2mm groove form is adopted; the end, close to the arc end, of the cantilever top plate of the diaphragm plate is provided with an arc extension section which retracts into the arc end of the cantilever top plate;
s3: assembling the wall plates: after the transverse partition plate in the cantilever top plate is installed to be qualified, positioning the wall plate at the arc-shaped end of the cantilever top plate, and aligning the central line of the node, the position line of the rabbet of the port and the verticality;
s4: assembling the side plate stiffening ribs: at the position of the arc extending direction of the diaphragm plate, spot welding is carried out on the side plate stiffening rib and the side edge of the arc position of the diaphragm plate in advance, the side plate stiffening rib is welded on the diaphragm plate completely, and a double-face angle welding seam form is formed between the side plate stiffening rib and the diaphragm plate;
s5: hoisting the side plates: respectively adding 20mm allowance blanking at two ends of the side plate, and hoisting the side plate onto a jig frame for assembly and positioning; the side plate stiffening ribs and the side plates are in a double-sided fillet welding form;
s6: assembling the bottom plate unit: a base plate unit is manufactured in advance, the base plate unit carries out assembly welding on a long stiffening plate on a horizontal jig frame along the direction perpendicular to the width, a double-sided fillet weld is formed between a long stiffening rib and the base plate, and the base plate unit is lifted onto the jig frame for assembly positioning after being corrected after welding; blanking the arc-shaped end of the bottom plate unit in the width direction according to the size, and blanking the straight end with the allowance of 20 mm;
s7: assembling and welding a leveling plate: welding a leveling plate on the bottom plate unit in a fillet weld manner;
s8: installing lifting lugs and side plate stiffening ribs: after the assembly of the bottom plate unit and the welding of the leveling plate are completed, the cantilever section of the steel box girder is integrally turned over, the rest side plate stiffening ribs on the side plates are sequentially welded, and the lifting lugs are welded on the cantilever top plate.
Furthermore, the stiffening plates and the stiffening plates on the lifting lugs in the S8 and the cantilever top plate are all in the form of fillet welds; the lifting lug and the cantilever top plate are fully melted through, and a root cleaning welding groove form is adopted.
Furthermore, a penetration welding seam is formed between the wall plate and the cantilever top plate in the S3, a single-side groove form with 40-degree roots and 2mm is adopted, the groove faces outwards and is welded flat, and an 8mm fillet welding seam is adopted on the inner side.
Furthermore, a penetration weld is formed between the side edge of the side plate and the wall plate in the S5, a single-side groove form with 40-degree roots and 2mm is adopted, the groove faces the inner side of the box body, and the reverse side is blocked by a fillet weld.
The invention has the advantages that:
1) according to the invention, the overhanging sections of the steel box girder are spliced and assembled in an integral welding mode, compared with a sectional type welding structure, the processing technology can meet the requirement of the supporting strength of the overhanging sections of the steel box girder, meanwhile, the welding procedures among all sections are reduced, and the phenomenon that the integral strength is reduced due to multiple welding is avoided; in addition, each part of the steel box girder overhanging section can be simultaneously blanked according to the size, and the steel box girder overhanging section can be directly welded in a coordinated manner according to the set procedure during subsequent assembly welding, so that the welding time is shortened, and the forming efficiency of the whole overhanging section is improved.
Drawings
The invention is described in further detail below with reference to the drawings and the detailed description.
FIG. 1 is a flow chart of a processing technology of a steel box girder cantilever section of an arc cantilever landscape platform.
Fig. 2 to 9 are schematic diagrams of the processing state of the cantilever section of the steel box girder of the arc cantilever landscape platform of 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 obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection 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 stated or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may be, for example, 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 processing technology for the overhanging section of the steel box girder of the circular arc overhanging landscape platform shown in the figures 1 to 9 specifically comprises the following steps:
s1: processing the cantilever top plate: placing the cantilever top plate on a horizontal jig frame to weld and install the long stiffening plate along the direction vertical to the width, when the length of the long stiffening plate is more than or equal to 5m, adding 1 per mill of welding shrinkage allowance in the length direction to perform blanking, blanking the arc end of the cantilever top plate in the width direction according to the size, adding 20mm of welding shrinkage allowance at the straight end, and then hanging the cantilever top plate on an assembly jig frame to perform positioning;
s2: assembling the diaphragm plates: manufacturing the diaphragm plate in advance, and prefabricating stiffening ribs and stiffening rings on the diaphragm plate; welding stiffening ribs on two sides of the diaphragm plate, and welding stiffening rings at the positions of the round holes; three groups of transverse clapboards are adopted to be vertical to the cantilever top plate and are welded along the width direction of the cantilever top plate; double-sided fillet welds are formed among the stiffening ribs, the stiffening rings and the diaphragm plates, and double-sided fillet welds are formed among the diaphragm plates and the cantilever top plates; a support stiffening plate is welded on the diaphragm plate in the middle position, and a penetration weld in a unit 40-degree root 2mm groove form is adopted; the end, close to the arc end, of the cantilever top plate of the diaphragm plate is provided with an arc extension section which retracts into the arc end of the cantilever top plate;
s3: assembling the wall plates: after the transverse partition plate in the cantilever top plate is installed to be qualified, positioning the wall plate at the arc-shaped end of the cantilever top plate, and aligning the central line of the node, the position line of the rabbet of the port and the verticality;
s4: assembling the side plate stiffening ribs: at the position of the arc extending direction of the diaphragm plate, spot welding is carried out on the side plate stiffening rib and the side edge of the arc position of the diaphragm plate in advance, the side plate stiffening rib is welded on the diaphragm plate completely, and a double-face angle welding seam form is formed between the side plate stiffening rib and the diaphragm plate;
s5: hoisting the side plates: respectively adding 20mm allowance blanking at two ends of the side plate, and hoisting the side plate onto a jig frame for assembly and positioning; the side plate stiffening ribs and the side plates are in a double-sided fillet welding form;
s6: assembling the bottom plate unit: a base plate unit is manufactured in advance, the base plate unit carries out assembly welding on a long stiffening plate on a horizontal jig frame along the direction perpendicular to the width, a double-sided fillet weld is formed between a long stiffening rib and the base plate, and the base plate unit is lifted onto the jig frame for assembly positioning after being corrected after welding; blanking the arc-shaped end of the bottom plate unit in the width direction according to the size, and blanking the straight end with the allowance of 20 mm;
s7: assembling and welding a leveling plate: welding a leveling plate on the bottom plate unit in a fillet weld manner;
s8: installing lifting lugs and side plate stiffening ribs: after the assembly of the bottom plate unit and the welding of the leveling plate are completed, the cantilever section of the steel box girder is integrally turned over, other side plate stiffening ribs on the side plates are sequentially welded, and a lifting lug is welded on the cantilever top plate.
The reinforcing plates and the stiffening plates on the lifting lugs in the S8 are in fillet weld forms with the cantilever top plate; the lifting lug and the cantilever top plate are fully melted through, and a root cleaning welding groove form is adopted.
And S3, a penetration weld is formed between the middle wall plate and the cantilever top plate, a single-side 40-degree groove with 2mm roots is adopted, the groove faces outwards and is welded flat, and an 8mm fillet weld is adopted on the inner side.
In the S5 process, a penetration weld is formed between the side edge of the side plate and the wall plate, a single-side groove form of 40-degree root retaining 2mm is adopted, the groove faces the inner side of the box body, and the reverse side is blocked by a fillet weld.
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 (4)
1. The utility model provides a section processing technology is encorbelmented to landscape platform steel box girder that encorbelments which characterized in that: the specific method comprises the following steps:
s1: processing the cantilever top plate: placing the cantilever top plate on a horizontal jig frame to weld and install the long stiffening plate along the direction vertical to the width, when the length of the long stiffening plate is more than or equal to 5m, adding 1 per mill of welding shrinkage allowance in the length direction to perform blanking, blanking the arc end of the cantilever top plate in the width direction according to the size, adding 20mm of welding shrinkage allowance at the straight end, and then hanging the cantilever top plate on an assembly jig frame to perform positioning;
s2: assembling the diaphragm plates: manufacturing a diaphragm plate in advance, and prefabricating a stiffening rib and a stiffening ring on the diaphragm plate at the same time; welding stiffening ribs on two sides of the diaphragm plate, and welding stiffening rings at the positions of the round holes; three groups of transverse clapboards are adopted to be vertical to the cantilever top plate and are welded along the width direction of the cantilever top plate; double-sided fillet welds are formed among the stiffening ribs, the stiffening rings and the diaphragm plates, and double-sided fillet welds are formed among the diaphragm plates and the cantilever top plates; a support stiffening plate is welded on the transverse partition plate positioned in the middle, and a penetration weld in the form of a unit 40-degree root-retaining 2mm groove is adopted; the end, close to the arc end, of the cantilever top plate, of the transverse partition plate is provided with an arc extension section which retracts towards the arc end of the cantilever top plate;
s3: assembling the wall plates: after the transverse partition plate in the cantilever top plate is installed to be qualified, the wall plate is positioned at the arc-shaped end of the cantilever top plate, and the center line of the node, the rabbet position line of the port and the verticality are determined;
s4: assembling the side plate stiffening ribs: at the position of the arc extending direction of the diaphragm plate, spot welding is carried out on the side plate stiffening rib and the side edge of the arc position of the diaphragm plate in advance, the side plate stiffening rib is welded on the diaphragm plate completely, and a double-sided angle welding seam form is formed between the side plate stiffening rib and the diaphragm plate;
s5: hoisting side plates: respectively adding 20mm allowance blanking at two ends of the side plate, and hoisting the side plate onto a jig frame for assembly and positioning; the side plate stiffening ribs and the side plates are in a double-sided fillet welding form;
s6: assembling the bottom plate unit: a base plate unit is manufactured in advance, the base plate unit carries out assembly welding on a long stiffening plate on a horizontal jig frame along the direction perpendicular to the width, a double-sided fillet weld is formed between a long stiffening rib and the base plate, and the base plate unit is lifted onto the jig frame for assembly positioning after being corrected after welding; blanking the arc-shaped end of the bottom plate unit in the width direction according to the size, and additionally blanking the straight end by 20mm allowance;
s7: assembling and welding a leveling plate: welding a leveling plate on the bottom plate unit in a fillet welding way;
s8: installing lifting lugs and side plate stiffening ribs: after the assembly of the bottom plate unit and the welding of the leveling plate are completed, the cantilever section of the steel box girder is integrally turned over, other side plate stiffening ribs on the side plates are sequentially welded, and a lifting lug is welded on the cantilever top plate.
2. The machining process for the cantilever section of the steel box girder of the circular arc cantilever landscape platform according to claim 1, characterized in that: the reinforcing plates on the lifting lugs in the S8 and the stiffening plates and the cantilever top plate are all in the form of fillet welds; the lifting lug and the cantilever top plate are fully melted through, and a root cleaning welding groove form is adopted.
3. The machining process for the cantilever section of the steel box girder of the circular arc cantilever landscape platform according to claim 1, characterized in that: and a penetration welding seam is formed between the middle wall plate and the cantilever top plate of the S3, a single-side 40-degree root-retaining 2mm groove form is adopted, the groove faces outwards and is welded flat, and an 8mm fillet welding seam is adopted on the inner side.
4. The machining process for the cantilever section of the steel box girder of the circular arc cantilever landscape platform according to claim 1, characterized in that: and a penetration weld is formed between the side edge of the side plate and the wall plate in the S5, a single-side groove form of 40-degree root retaining 2mm is adopted, the groove faces the inner side of the box body, and the reverse side is blocked by a fillet weld.
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| CN109208486A (en) * | 2018-10-19 | 2019-01-15 | 江苏京沪重工有限公司 | Joining section manufacturing process between a kind of Steel Bridge top plate |
| CN210439118U (en) * | 2019-07-19 | 2020-05-01 | 绍兴中林预制构件有限公司 | Novel concrete bridge plate |
| CN111496405A (en) * | 2020-03-31 | 2020-08-07 | 广西路桥工程集团有限公司 | Processing and manufacturing method of split type steel box girder |
| CN111395148A (en) * | 2020-04-03 | 2020-07-10 | 安徽省交通控股集团有限公司 | Steel beam and combined beam connecting structure |
| CN111926705A (en) * | 2020-05-08 | 2020-11-13 | 江苏中铁山桥重工有限公司 | Method for integrally assembling ultra-wide framing steel box girder |
| CN111975278A (en) * | 2020-10-26 | 2020-11-24 | 中铁隧道局集团路桥工程有限公司 | Splicing welding jig frame for steel box girder and splicing welding process thereof |
| CN112536542A (en) * | 2020-12-11 | 2021-03-23 | 洛阳豫安金属结构有限公司 | Manufacturing method of ramp steel box girder |
| CN112496590A (en) * | 2020-12-31 | 2021-03-16 | 江苏京沪重工有限公司 | Cantilever type steel box girder manufacturing process |
| CN112496589A (en) * | 2020-12-31 | 2021-03-16 | 江苏京沪重工有限公司 | Manufacturing process of anchoring section box girder |
| CN112963028A (en) * | 2021-02-09 | 2021-06-15 | 北京城建六建设集团有限公司 | Assembly structure of overlong overhanging variable-section arc beam of stand and construction method thereof |
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