CN111576184A - Large-span arched multi-cavity variable-cross-section variable-plate-thickness box beam and manufacturing method thereof - Google Patents
Large-span arched multi-cavity variable-cross-section variable-plate-thickness box beam and manufacturing method thereof Download PDFInfo
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- CN111576184A CN111576184A CN202010480901.0A CN202010480901A CN111576184A CN 111576184 A CN111576184 A CN 111576184A CN 202010480901 A CN202010480901 A CN 202010480901A CN 111576184 A CN111576184 A CN 111576184A
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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
- E01D4/00—Arch-type bridges
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/20—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of concrete, e.g. reinforced concrete, or other stonelike material
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/342—Structures covering a large free area, whether open-sided or not, e.g. hangars, halls
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/38—Arched girders or portal frames
- E04C3/44—Arched girders or portal frames of concrete or other stone-like material, e.g. with reinforcements or tensioning members
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Abstract
The invention relates to a steel structural member, in particular to a large-span arched multi-cavity variable-section variable-plate-thickness box beam and a manufacturing method thereof. The box-type beam comprises variable cross-section arc box-type sections, thick plate box-type joint sections, multi-cavity thick plate straight box-type sections and multi-cavity inclined box-type sections, adjacent variable cross-section arc box-type sections are connected through thick plate box-type joint sections and multi-cavity thick plate straight box-type sections which are arranged at intervals, the variable cross-section arc box-type section in the middle of the box-type beam is connected with the variable cross-section arc box-type sections at two ends of the box-type beam through the thick plate box-type joint sections, and the multi-cavity inclined box-type sections are arranged at two ends; the variable cross-section arc box type section comprises a first variable cross-section arc box type section arranged in the middle of the box type beam and second variable cross-section arc box type sections arranged in the front and the rear of the box type beam; the plate thickness of the first variable cross-section arc-shaped box section is smaller than that of the second variable cross-section arc-shaped box section, and a U-shaped reinforcing rib is arranged on the inner side of a web plate of the first variable cross-section arc-shaped box section. The invention increases the bending strength and the shearing strength of the box girder.
Description
Technical Field
The invention relates to a steel structural member, in particular to a large-span arched multi-cavity variable-section variable-plate-thickness box beam and a manufacturing method thereof.
Background
At present, a box beam is one of the widely used members in a steel structure, and an arched box beam has a variable cross-section structure and has the advantages of high strength, light weight, high reliability and the like. With the increase of the span of the arch box girder, the box girder with a simple section has poor stability and can not meet the requirements of bending resistance and shear strength.
Disclosure of Invention
The invention aims to solve the technical problems and provides a large-span arched multi-cavity variable cross-section variable plate thickness box girder with high strength.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a large-span arched multi-cavity variable-cross-section variable-plate-thickness box beam is arched as a whole and is of a variable-cross-section structure, the box beam comprises variable-cross-section arc box sections, thick-plate box joint sections, multi-cavity thick-plate straight box sections and multi-cavity inclined box sections, adjacent variable-cross-section arc box sections are connected with the multi-cavity thick-plate straight box sections through thick-plate box joint sections arranged at intervals, the variable-cross-section arc box section in the middle of the box beam is connected with the variable-cross-section arc box sections at two ends of the box beam through the thick-plate box joint sections, and the multi-cavity inclined box sections are arranged at two ends of the box beam; the variable cross-section arc box type section comprises a first variable cross-section arc box type section arranged in the middle of the box type beam and second variable cross-section arc box type sections arranged in the front and the rear of the box type beam; the plate thickness of the first variable cross-section arc-shaped box section is smaller than that of the second variable cross-section arc-shaped box section, and a U-shaped reinforcing rib is arranged on the inner side of a web plate of the first variable cross-section arc-shaped box section.
Compared with the prior art, the invention adopting the technical scheme has the beneficial effects that:
variable cross-section arc box section adopts different thick boards, and middle variable cross-section arc box section is equipped with the strengthening rib, and thick plate box node section and the straight box section interval of multi-chamber thick plate set up, have increased bending resistance, shear strength of box girder, have increased life.
The further optimization scheme of the invention is as follows:
the multi-cavity inclined box type section comprises an inclined box type part, a straight box type bracket and a parallelogram box type bracket, wherein a plurality of layers of vertical first partition plates, second partition plates and third partition plates are arranged in the inclined box type part from the middle to two sides respectively, and a plurality of layers of horizontal first transverse rib plates are arranged between the adjacent first partition plates; the straight box type portion is located the inboard of oblique box type portion, has vertical fourth baffle and fifth baffle in the straight box type portion, is equipped with the first horizontal gusset of multilayer horizontally between the web of fourth baffle and oblique box type portion, and the oblique box type portion outside is equipped with the straight bracket of parallelogram box type bracket and big box type, is equipped with the straight bracket of parallelogram box type between the both sides of straight box type portion and the oblique box type.
The multi-cavity thick plate vertical box section comprises a multi-cavity thick plate vertical box body, a large box type straight bracket and a parallelogram box type bracket, wherein a transverse first vertical partition plate and a transverse second vertical partition plate are arranged in the middle of the multi-cavity thick plate vertical box body; the both sides at the middle part of the straight case type body of multi-chamber thick plate are equipped with the straight bracket of big box respectively, from interior to exterior is equipped with vertical sixth vertical baffle in proper order in the straight bracket portion of big case type of one side, the seventh vertical baffle, eighth vertical baffle and ninth vertical baffle, the both sides of the straight bracket of big case type of this side are equipped with parallelogram box bracket respectively, from interior to exterior is equipped with the tenth vertical baffle of horizontally in proper order in the straight bracket of big case type of opposite side, vertical eleventh vertical baffle and vertical twelfth vertical baffle, one side of the straight bracket of big case type of this side is equipped with parallelogram box bracket.
The first vertical partition plate, the second vertical partition plate and the fourth vertical partition plate are equal in thickness, and the third vertical partition plate and the fifth vertical partition plate are smaller than the first partition plate in thickness.
The inside thirteenth vertical baffle, the fourteenth vertical baffle, the fifteenth vertical baffle, the sixteenth vertical baffle that are equipped with of thick plate box node section, be equipped with the horizontally cross slab between thirteenth vertical baffle and the fourteenth vertical baffle.
A method for manufacturing a long-span arch-shaped multi-cavity variable cross-section variable thickness box girder according to any one of claims 1 to 5, comprising the steps of:
A. disassembling picture and composing
Disassembling the drawing according to the drawing requirements, and performing part typesetting through PRENEST professional typesetting software after the drawing is disassembled;
B. discharging
Carrying out numerical control flame cutting after typesetting, carrying out part identification after cutting, and beveling by a semi-automatic flame cutting machine;
C. variable cross-section arc box section, thick plate box type node section, multi-cavity thick plate straight box section and multi-cavity inclined box section of assembly welding variable cross-section variable plate thick box beam
1) Assembly welding of first variable cross-section arc-shaped box section and second variable cross-section arc-shaped box section
Firstly, a lower wing plate of a first variable cross-section arc-shaped box section is placed on a flat tire, U-shaped reinforcing ribs are welded on the inner side surfaces of two webs, the webs are welded on the lower wing plate, and finally an upper wing plate is welded; the welding method of the second variable cross-section arc box section is the same as that of the first variable cross-section arc box section;
2) assembly welding of multi-cavity inclined box section
(1) The lower wing plate of the inclined box type part of the multi-cavity inclined box type section is placed on a flat tire, the welding area is polished,
(2) assembling the two webs of the inclined box-shaped part,
(3) assembling each partition plate and the transverse rib plate in the inclined box type part, and buckling and covering;
(4) assembling a lower wing plate and a web plate of the straight box-shaped part, assembling each partition plate and a transverse rib plate in the straight box-shaped part, and buckling and covering;
(5) welding box-type main seams of the inclined box-type part and the straight box-type part;
(6) assembling and welding a parallelogram box bracket and a large box straight bracket;
3) assembly welding multi-cavity thick plate straight box section
(1) Placing the box-shaped lower wing plate on a flat tire, and polishing a welding area;
(2) assembling two box-type webs, and assembling the box-type webs into a U shape;
(3) assembling each partition plate and each rib plate in the box-shaped part, and buckling and covering;
(4) after the main body is welded, an outer large box-shaped straight bracket is assembled;
(5) after the main body is welded, assembling an outer parallelogram box-type corbel;
4) assembling and welding a thick plate box type node section;
(1) firstly, placing a box-shaped lower wing plate on a flat tire, and polishing a welding area;
(2) secondly, assembling two box-type webs to form a U shape;
(3) assembling each partition plate and each rib plate in the box-shaped part, and buckling and covering;
d assembled small unit
Assembling and welding two sections of variable cross-section arc box sections, a thick plate box node section and a multi-cavity thick plate straight box section into an assembled small unit, erecting a vertical surface jig frame before assembling the assembled small unit, drawing a central line and a datum line of a steel beam body at the position of the jig frame, assembling the assembled small unit by controlling a lifting point and a bracket angle, and inspecting after welding;
e integral assembly
After the assembled small units are subjected to size acceptance, a plurality of assembled small units are assembled into a large-span arched multi-cavity variable-section variable-plate-thickness box-type beam, and the inspection is performed after welding, wherein the inspection mode is the same as that of the assembled small units.
Drawings
FIG. 1 is an overall perspective view of an embodiment of the present invention;
FIG. 2 is a perspective view of a first variable cross-section curved box section of an embodiment of the present invention;
FIG. 3 is a perspective view of a second variable cross-section curved box section of an embodiment of the present invention;
FIG. 4 is a perspective view of the internal structure of a multi-chambered, slanted box section of an embodiment of the present invention;
FIG. 5 is an overall perspective view of a multi-chamber ramp-box section of an embodiment of the present invention;
FIG. 6 is a perspective view of the internal structure of a multi-chamber thick plate straight box section of an embodiment of the present invention;
FIG. 7 is an overall perspective view of a multi-cavity thick plate straight box section of an embodiment of the present invention;
FIG. 8 is a perspective view of a plank box type node section of an embodiment of the present invention;
in the figure, a multi-cavity inclined box type section 1; a tilt box type portion 101; a straight box-shaped portion 102; a first separator 103; a second partition 104; a third partition plate 105; first transverse web 106; a fourth partition plate 107; a fifth partition 108; a second variable cross-section arc box section 2; a first variable cross-section arc box section 3; a lower flange plate 301; a web 302; an upper flange plate 303; a reinforcing rib 304; a multi-cavity thick plate straight box section 4; a first vertical partition 401; a second vertical partition 402; a third vertical partition 403; a fourth vertical partition 404; a fifth vertical partition 405; a first rib plate 406; a second rib plate 407; a third rib plate 408; a fourth rib plate 409; a fifth rib 410; a sixth vertical partition 411; a seventh vertical partition 412; an eighth vertical partition 413; a ninth vertical partition 414; a tenth vertical partition 415; an eleventh vertical partition 416; a twelfth vertical partition 417; a thick plate box type node section 5; a thirteenth vertical partition 501; a fourteenth vertical partition 502; a fifteenth vertical partition 503; a sixteenth vertical partition 504; a bulkhead 505; a parallelogram corbel 6; a partition plate 601; a large box-shaped straight bracket 7.
Detailed Description
The invention is further described in detail below with reference to the figures and examples.
Referring to fig. 1, the present embodiment is a large-span arched multi-cavity variable cross-section variable plate thickness box beam, the whole box beam is arched, and has a variable cross-section structure and a span of 90.6 meters. The box girder consists of a multi-cavity inclined box section 1, a second multi-section variable-cross-section arc-shaped box section 2, a first variable-cross-section arc-shaped box section 3, a multi-cavity thick plate straight box section 4, a thick plate box node section 5, a parallelogram bracket 6 and a large box straight bracket 7. The four first variable cross-section arc box-shaped sections 3 are arranged in the middle of the box-shaped beam, the five second variable cross-section arc box-shaped sections 2 are arranged at the front of the box-shaped beam, the six second variable cross-section arc box-shaped sections 2 are arranged at the rear of the box-shaped beam, and the front end and the rear end of the box-shaped beam are respectively provided with a multi-cavity inclined box-shaped section 1.
The first variable cross-section arc-shaped box section 3 is rectangular in cross section (shown in fig. 2), and is composed of a lower flange plate 301, two webs 302, an upper flange plate 303 and reinforcing ribs 304, wherein two longitudinal reinforcing ribs 304 are respectively welded to the inner side surfaces of the two webs 302, and the cross section of each reinforcing rib 304 is U-shaped. The second variable cross-section arc box section 2 is composed of a lower flange plate 301, two web plates 302 and an upper flange plate 303 (shown in fig. 3), and the plate thickness of the first variable cross-section arc box section 3 is smaller than that of the second variable cross-section arc box section 2. The variable cross-section arc-shaped box sections of the box-shaped beam are connected with each other by welding through multi-cavity thick plate straight box sections 4 and thick plate box type node sections 5 which are arranged at intervals. The first variable cross-section arc-shaped box section 3 positioned in the middle of the box beam is connected with the first variable cross-section arc-shaped box sections 3 at two ends of the first variable cross-section arc-shaped box section in a welding mode through thick plate box type node sections 5.
The multi-cavity inclined box type section comprises an inclined box type part 101, a straight box type part 102, a straight box type corbel 7, a parallelogram box type corbel 6 and the like (shown in figures 4 and 5), the section of the inclined box type part is rectangular and transversely arranged, a body of the inclined box type part comprises a lower flange plate 301, two web plates 302 and an upper flange plate 303, three layers of vertical first partition plates 103 are arranged from the middle to two sides in the inclined box type part 101 respectively, two layers of second partition plates 104 are arranged on the left side of each first partition plate 103, and one layer of third partition plate 105 is arranged on the left side of each second partition plate 104; a layer of second separator 104 and a layer of third separator 105 are provided on the right side of the first separator 103. The first partition plate 103, the second partition plate 104, and the third partition plate 105 are welded to the main body of the bellows-shaped portion 101. And 3 layers of horizontal first transverse rib plates 106 are arranged between the adjacent first partition plates 103. The straight box type part 102 is located on the inner side of the inclined box type part 101, the body of the straight box type part 102 is composed of a lower flange plate 301, two web plates 302 and an upper flange plate 303, a vertical fourth partition plate 107 and a vertical fifth partition plate 108 are arranged in the straight box type part 102, and 3 layers of horizontal first transverse rib plates 106 are arranged between the fourth partition plate 107 and the web plates 302 of the inclined box type part 101. The inner end of the straight box-shaped part 102 is welded with the first variable cross-section arc-shaped box-shaped section 3. The outer side of the inclined box type part 101 is provided with a parallelogram box type corbel 6 and a large box type straight corbel 7, and the parallelogram box type corbel 6 is arranged between the two sides of the straight box type part 102 and the inclined box type part 101. The first partition plate 103, the fourth partition plate 107 and the second partition plate 104 are formed with circular holes, and the third partition plate 105 and the fifth partition plate 108 are formed with rectangular holes.
The multi-cavity thick plate straight box section 4 is composed of a multi-cavity thick plate straight box body, a parallelogram box bracket 6 and a large box straight bracket 7 (shown in fig. 6 and 7), the multi-cavity thick plate straight box body is composed of a lower flange plate 301, two web plates 302 and an upper flange plate 303, a transverse first vertical partition plate 401 and a transverse second vertical partition plate 402 are arranged in the middle of the multi-cavity thick plate straight box body, a fourth vertical partition plate 404 is arranged on the outer side of the first vertical partition plate 401, a third vertical partition plate 403 is arranged on the outer side of the second vertical partition plate 402, and fifth vertical partition plates 405 are arranged at two ends of the multi-cavity thick plate straight box body respectively. The first vertical partition 401, the second vertical partition 402, the third vertical partition 403 and the fourth vertical partition 404 are provided with round holes, and the fifth vertical partition 405 is provided with a rectangular hole. A longitudinal first rib plate 406 and a longitudinal second rib plate 407 are arranged between the first vertical partition plate 401 and the second vertical partition plate 402, a horizontal third rib plate 408 and a longitudinal fourth rib plate 409 are arranged between the first vertical partition plate 401 and the fourth vertical partition plate 404, and a fifth rib plate 410 is arranged between the web plates 302 at the inner side of the third vertical partition plate 403. The thicknesses of the first vertical partition board 401, the second vertical partition board 402 and the fourth vertical partition board 404 are equal, and the thicknesses of the third vertical partition board 403 and the fifth vertical partition board 405 are smaller than that of the first partition board 401.
Two ends of the body of the multi-cavity thick plate straight box section 4 are respectively welded with the variable cross-section arc box section. The two sides of the middle part of the multi-cavity thick plate straight box type 4 body are respectively welded with a big box type straight corbel part 7, a vertical sixth vertical partition 411, a seventh vertical partition 412, an eighth vertical partition 413 and a ninth vertical partition 414 are sequentially arranged in the left big box type straight corbel part 7 from inside to outside, round holes are machined in the sixth vertical partition 411, the seventh vertical partition 412 and the eighth vertical partition 413, and a rectangular hole is machined in the ninth vertical partition 414. The front side and the rear side of the large box type straight bracket part on the side are respectively welded with a parallelogram box type bracket 6; the large box-type straight bracket 7 on the right side is internally provided with a tenth vertical partition 415, an eleventh vertical partition 416 and a twelfth vertical partition 417 from inside to outside in sequence, the eleventh vertical partition 416 is provided with a round hole, the twelfth vertical partition 417 is provided with a rectangular hole, the front side of the large box-type straight bracket 7 on the side is welded with a parallelogram box-type bracket 6, and a partition 601 is arranged in the parallelogram box-type bracket 6.
The body of the thick plate box-type node section 5 is composed of a lower flange plate 301, two webs 302 and an upper flange plate 303 (shown in fig. 8), a thirteenth vertical partition plate 501, a fourteenth vertical partition plate 502, a fifteenth vertical partition plate 503 and a sixteenth vertical partition plate 504 which are vertical are arranged inside the body, a horizontal transverse partition plate 505 is arranged between the thirteenth vertical partition plate 5 and the fourteenth vertical partition plate 502, and rectangular holes are processed in the fifteenth vertical partition plate 503 and the sixteenth vertical partition plate 504. The two ends of the body of the thick plate box type node section 5 are respectively welded with the variable cross-section arc box type section. The various baffles in this embodiment are provided with a manhole structure.
The main part of this embodiment comprises the multi-chamber node, and the baffle assembly welding order is more in the cavity, and the main part span is 90.6 meters arch box roof beams, and the connection bracket is the parallelogram bracket between the roof beam, and the space size control degree of difficulty is great, and the node board is thick to reach 85 millimeters, and the weldability is relatively poor, and preparation quality and accuracy control degree of difficulty are big, and consequently, the processing preparation technology of the variable-cross-section variable-thickness box roof beam of large-span arch multi-chamber is very important in this engineering. In the embodiment, a construction scheme of single-section manufacture in a factory and integral assembly in a construction site is adopted, and the large-span arched beam of 90.6 meters is divided into eight sections.
A method for manufacturing a large-span arched multi-cavity variable-cross-section variable-plate-thickness box beam comprises the following steps of:
A. disassembling picture and composing
The drawing is disassembled according to the drawing requirements, most of the large-span arched multi-cavity variable cross-section variable plate thickness box-shaped beams are of special-shaped structures, most of the parts are special-shaped parts, and 1:1 lofting is needed. The machining allowance and the welding shrinkage are considered when the drawing is disassembled, and the parts are typeset through PRENEST professional typesetting software after the drawing is disassembled;
B. discharging
Carrying out numerical control flame cutting after typesetting, carrying out part identification, part number identification and groove angle after cutting, and grooving by a semi-automatic flame cutting machine to control the groove angle;
C. variable cross-section arc box section, thick plate box type node section 5, multi-cavity thick plate straight box section 4 and multi-cavity inclined box section 1 of assembly welding variable cross-section variable plate thick box type beam
1) Assembly welding of a first variable cross-section arc box section 3 and a second variable cross-section arc box section 2
Firstly, a lower wing plate 301 of a first variable cross-section arc-shaped box section 3 is placed on a flat tire, U-shaped reinforcing ribs 304 are welded on the inner side surfaces of two web plates 302, the web plates 302 are welded on the lower wing plate 301, and finally an upper wing plate 303 is welded; the welding method of the second variable cross-section arc box section is the same as that of the first variable cross-section arc box section;
2) assembly welding of multi-cavity inclined box section
(1) The lower wing plate 301 of the inclined box part of the multi-cavity inclined box section is placed on a flat tire, the welding area is polished,
(2) assembling two webs 302 of the inclined box-shaped part, assembling the box-shaped parts into a U shape,
(3) assembling three first partition plates 103 and three first transverse rib plates 106 in the inclined box type part, performing cover buckling after welding, performing welding of a second partition plate 104, a third partition plate 105, a first transverse rib plate 106, a fourth partition plate 107 and a fifth partition plate 108 after cover buckling is completed, and finally performing cover buckling plate welding, wherein operators of partition plate vertical plates which cannot be welded in the box can perform welding in the hole through the manhole hole;
(4) assembling a lower wing plate 301 and a web plate 302 of the straight box-shaped part, assembling a fourth partition plate 107, a fifth partition plate 108 and a first transverse rib plate 106 in the straight box-shaped part, and buckling and covering;
(5) welding box-type main seams of the inclined box-type part and the straight box-type part;
(6) assembling and welding a parallelogram box type bracket 6 and a large box type straight bracket 7;
3) assembling and welding a multi-cavity thick plate straight box section;
(1) placing the box-shaped lower wing plate 301 on a flat tire, and polishing a welding area;
(2) assembling two box type webs 302, and assembling the box type webs into a U-shaped structure;
(3) assembling two first vertical partition boards 401 and a second vertical partition board 402 in a box shape, assembling all first rib plates 406 and second rib plates 407 between the first vertical partition boards 401 and the second vertical partition boards 402, covering after welding, and welding the first vertical partition boards 401, the second vertical partition boards 402, the first rib plates 406, the second rib plates 407 and the final covering plates after covering;
(4) after welding, the fifth rib plate 410, the third vertical partition plate 403 and the fifth vertical partition plate 405 are assembled and welded from inside to outside in sequence; the other end is sequentially welded with a third rib plate 408, a fourth rib plate 409, a fourth vertical clapboard 404 and a fifth vertical clapboard 405;
(5) after the main body is welded, assembling an outer box-type corbel, firstly assembling two side webs 302 on an assembled lower wing plate 301, and sequentially welding a left sixth vertical partition 411, a seventh vertical partition 4.12, an eighth vertical partition 413 and a ninth vertical partition 414 after the assembly is completed; a tenth vertical clapboard 415, an eleventh vertical clapboard 416 and a twelfth vertical clapboard 417 are welded on the right side in sequence,
(6) after the main body is welded, assembling an outer parallelogram box-type corbel 6;
4) assembly welding thick plate box type node section
(1) Firstly, placing a box-shaped lower wing plate 301 on a flat tire, and polishing a welding area;
(2) secondly, assembling two box-type webs 302, and assembling the box-type webs into a U shape;
(3) assembling two thirteenth vertical partition boards 501 and a fourteenth vertical partition board 502 in the box, assembling a transverse partition board 505 between the thirteenth vertical partition board 501 and the fourteenth vertical partition board 502, performing buckle closure on the transverse partition board 505 after welding, performing welding on the thirteenth vertical partition board 501, the fourteenth vertical partition board 502 and the final buckle closure board after the buckle closure is completed, and assembling and welding a fifteenth vertical partition board 503 and a sixteenth vertical partition board 504 from inside to outside in sequence after welding is completed;
d assembled small unit
Two sections of variable cross-section arc-shaped box sections, a thick plate box node section 4 and a multi-cavity thick plate straight box section 5 are assembled and welded into an assembled small unit, the embodiment is composed of 8 sections of assembled small units, a vertical surface jig frame needs to be erected before the small units are assembled, a central line and a reference line of a steel beam body are drawn at the position of the jig frame, then the assembled small units are assembled by controlling lifting points and bracket angles, and the inspection is carried out after the welding is finished. TEKLA drawing software draws a three-dimensional model for guiding the manufacture of a large-span arched multi-cavity variable-section variable-plate-thickness box-shaped beam, virtually splicing small units in the three-dimensional model, measuring the elevation and horizontal size of each section of small unit splicing node in the three-dimensional model, guiding a factory to set up a vertical surface jig frame according to the size, drawing a central line and a datum line of a steel beam body at the position of the jig frame, setting small splicing unit lifting points, and sequentially hoisting and aligning the small nodes after the marks are clear. After the assembled small unit main body is lifted and adjusted, the actual small unit bracket is adjusted through the point-to-point size of the outer opposite bracket measured by the three-dimensional model until the actual assembled size is matched with the simulated size, so that the standard requirement is met, and welding and communication can be carried out;
e integral assembly
And after the small assembled units are subjected to checking and acceptance, the small assembled units are integrally assembled, a plurality of small assembled units are assembled into a large-span arched multi-cavity variable-section variable-plate-thickness box-type beam, actual assembling and welding are guided by the virtual assembling size of the three-dimensional model according to the small assembled units, and the checking mode is the same as that of the small assembled units after the welding is finished.
The invention adopts the construction scheme of single-section manufacture of a factory and integral assembly of a construction site, namely, a 90.6-meter large-span arched beam is divided into eight sections, a three-dimensional model is drawn through TEKLA drawing software and used for guiding the manufacture of the large-span arched multi-cavity variable-section variable-thickness box-shaped beam, pre-assembly simulation is carried out through the TEKLA drawing software, various control sizes required by factory assembly are simulated, the factory and the construction site are guided to be assembled through the given various control sizes, part of nodes of the large-span arched multi-cavity variable-section variable-thickness box-shaped beam are multi-cavity boxes, a plurality of layers of transverse and longitudinal clapboards are arranged in each box, and the multi-cavity clapboards in each box are welded in one hundred percent by adopting a mode of removing and welding the.
Compared with the traditional processing mode, the invention has the beneficial effects that the ground sample is well laid on the flat tire according to the plane drawing, the shape of the component is made into a plumb bob according to the ground sample, and then the component is assembled: the steel beam body is formed by butt joint of a plurality of multi-cavity nodes and a plurality of variable cross-section box-shaped nodes, the span is 90.6 meters, a plurality of large box-shaped straight brackets and a plurality of parallelogram box-shaped inclined brackets are arranged outside the nodes, the brackets are more in distribution and are mostly space parallelogram brackets, and the structure is complex. To this structural style, carry out the segmentation preparation of mill with the large-span roof beam, with multicavity body node segmentation preparation in mill, with the butt joint of interior division of diaphragm group, realize that the diaphragm hundred per cent welds in the multicavity node, through the mode of the whole concatenation in building site, realize 90.6 meters large-span roof beam installation. Adopt this construction method effectual assurance assembly accuracy and welding quality, the three-dimensional solid model simulation laying-out that the mill drawn through TEKLA, the simulation assembly, use three-dimensional drawing size to carry out the monomer component preparation, guarantee the whole concatenation of large-span roof beam through three-dimensional size control, the assembly of the straight bracket of big box type and the oblique bracket of parallelogram box type, the preparation degree of difficulty has been reduced, the machining efficiency is improved, solve mill, building site construction difficult problem, fill the technological blank in this structure in the field when reducing the preparation degree of difficulty of this kind of complicated steel construction.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the present invention, which is defined in the appended claims.
Claims (6)
1. The large-span arched multi-cavity variable-cross-section variable-plate-thickness box beam is arched and has a variable cross-section structure and is characterized in that the box beam comprises a variable cross-section arc box section, a thick-plate box node section, a multi-cavity thick-plate straight box section and a multi-cavity inclined box section, adjacent variable cross-section arc box sections are connected with the multi-cavity thick-plate straight box section through thick-plate box node sections arranged at intervals, the variable cross-section arc box section in the middle of the box beam is connected with the variable cross-section arc box sections at two ends of the box beam through the thick-plate box node sections, and the multi-cavity inclined box sections are arranged at two ends of the box beam; the variable cross-section arc box type section comprises a first variable cross-section arc box type section arranged in the middle of the box type beam and second variable cross-section arc box type sections arranged in the front and the rear of the box type beam; the plate thickness of the first variable cross-section arc-shaped box section is smaller than that of the second variable cross-section arc-shaped box section, and a U-shaped reinforcing rib is arranged on the inner side of a web plate of the first variable cross-section arc-shaped box section.
2. The large-span arched multi-cavity variable-cross-section variable-thickness box-type beam according to claim 1, wherein the multi-cavity inclined box-type section comprises an inclined box-type part, a straight box-type corbel and a parallelogram box-type corbel, a plurality of layers of vertical first partition plates, a plurality of layers of vertical second partition plates and a plurality of layers of vertical third partition plates are arranged in the inclined box-type part from the middle to two sides, and a plurality of layers of horizontal first transverse rib plates are arranged between the adjacent first partition plates; the straight box type portion is located the inboard of oblique box type portion, has vertical fourth baffle and fifth baffle in the straight box type portion, is equipped with the first horizontal gusset of multilayer horizontally between the web of fourth baffle and oblique box type portion, and the oblique box type portion outside is equipped with the straight bracket of parallelogram box type bracket and big box type, is equipped with the straight bracket of parallelogram box type between the both sides of straight box type portion and the oblique box type.
3. The large-span arched multi-cavity variable-cross-section variable-thickness box-type beam according to claim 1, which is characterized in that a multi-cavity thick plate straight box section comprises a multi-cavity thick plate straight box-type body, a large box straight corbel and a parallelogram box corbel, a first transverse vertical partition plate and a second transverse vertical partition plate are arranged in the middle of the multi-cavity thick plate straight box-type body, a fourth vertical partition plate is arranged on the outer side of the first vertical partition plate, a third vertical partition plate is arranged on the outer side of the second vertical partition plate, fifth vertical partition plates are respectively arranged at two ends of the multi-cavity thick plate straight box-type part, a first longitudinal rib plate and a second longitudinal rib plate are arranged between the first vertical partition plate and the second vertical partition plate, a horizontal third rib plate and a longitudinal fourth longitudinal rib plate are arranged between the first partition plate and the fourth vertical partition plate, and a fifth rib plate is arranged between webs on the inner side of the; the both sides at the middle part of the straight case type body of multi-chamber thick plate are equipped with the straight bracket of big box respectively, from interior to exterior is equipped with vertical sixth vertical baffle in proper order in the straight bracket portion of big case type of one side, the seventh vertical baffle, eighth vertical baffle and ninth vertical baffle, the both sides of the straight bracket of big case type of this side are equipped with parallelogram box bracket respectively, from interior to exterior is equipped with the tenth vertical baffle of horizontally in proper order in the straight bracket of big case type of opposite side, vertical eleventh vertical baffle and vertical twelfth vertical baffle, one side of the straight bracket of big case type of this side is equipped with parallelogram box bracket.
4. The long-span arch-shaped multi-cavity variable cross-section variable thickness box girder according to claim 3, wherein the first vertical partition, the second vertical partition and the fourth vertical partition have the same thickness, and the third vertical partition and the fifth vertical partition have a thickness smaller than that of the first partition.
5. The large-span arched multi-cavity variable-cross-section variable-thickness box-type beam as claimed in claim 1, wherein a thirteenth vertical partition plate, a fourteenth vertical partition plate, a fifteenth vertical partition plate and a sixteenth vertical partition plate are vertically arranged in the thick plate box-type node section, and a horizontal transverse partition plate is arranged between the thirteenth vertical partition plate and the fourteenth vertical partition plate.
6. A method for manufacturing a long-span arch-shaped multi-cavity variable cross-section variable thickness box girder according to any one of claims 1 to 5, comprising the steps of:
A. disassembling picture and composing
Disassembling the drawing according to the drawing requirements, and performing part typesetting through PRENEST professional typesetting software after the drawing is disassembled;
B. discharging
Carrying out numerical control flame cutting after typesetting, carrying out part identification after cutting, and beveling by a semi-automatic flame cutting machine;
C. variable cross-section arc box section, thick plate box type node section, multi-cavity thick plate straight box section and multi-cavity inclined box section of assembly welding variable cross-section variable plate thick box beam
1) Assembly welding of first variable cross-section arc-shaped box section and second variable cross-section arc-shaped box section
Firstly, a lower wing plate of a first variable cross-section arc-shaped box section is placed on a flat tire, U-shaped reinforcing ribs are welded on the inner side surfaces of two webs, the webs are welded on the lower wing plate, and finally an upper wing plate is welded; the welding method of the second variable cross-section arc box section is the same as that of the first variable cross-section arc box section;
2) assembly welding of multi-cavity inclined box section
(1) The lower wing plate of the inclined box type part of the multi-cavity inclined box type section is placed on a flat tire, the welding area is polished,
(2) assembling the two webs of the inclined box-shaped part,
(3) assembling each partition plate and the transverse rib plate in the inclined box type part, and buckling and covering;
(4) assembling a lower wing plate and a web plate of the straight box-shaped part, assembling each partition plate and a transverse rib plate in the straight box-shaped part, and buckling and covering;
(5) welding box-type main seams of the inclined box-type part and the straight box-type part;
(6) assembling and welding a parallelogram box bracket and a large box straight bracket;
3) assembly welding multi-cavity thick plate straight box section
(1) Placing the box-shaped lower wing plate on a flat tire, and polishing a welding area;
(2) assembling two box-type webs, and assembling the box-type webs into a U shape;
(3) assembling each partition plate and each rib plate in the box-shaped part, and buckling and covering;
(4) after the main body is welded, an outer large box-shaped straight bracket is assembled;
(5) after the main body is welded, assembling an outer parallelogram box-type corbel;
4) assembling and welding a thick plate box type node section;
(1) firstly, placing a box-shaped lower wing plate on a flat tire, and polishing a welding area;
(2) secondly, assembling two box-type webs to form a U shape;
(3) assembling each partition plate and each rib plate in the box-shaped part, and buckling and covering;
d assembled small unit
Assembling and welding two sections of variable cross-section arc box sections, a thick plate box node section and a multi-cavity thick plate straight box section into an assembled small unit, erecting a vertical surface jig frame before assembling the assembled small unit, drawing a central line and a datum line of a steel beam body at the position of the jig frame, assembling the assembled small unit by controlling a lifting point and a bracket angle, and inspecting after welding;
e integral assembly
After the assembled small units are subjected to size acceptance, a plurality of assembled small units are assembled into a large-span arched multi-cavity variable-section variable-plate-thickness box-type beam, and the inspection is performed after welding, wherein the inspection mode is the same as that of the assembled small units.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010480901.0A CN111576184A (en) | 2020-05-30 | 2020-05-30 | Large-span arched multi-cavity variable-cross-section variable-plate-thickness box beam and manufacturing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010480901.0A CN111576184A (en) | 2020-05-30 | 2020-05-30 | Large-span arched multi-cavity variable-cross-section variable-plate-thickness box beam and manufacturing method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114250908A (en) * | 2020-12-31 | 2022-03-29 | 江苏沪宁钢机股份有限公司 | Longitudinal and transverse partition plate inside super-large-section box body and manufacturing method thereof |
-
2020
- 2020-05-30 CN CN202010480901.0A patent/CN111576184A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114250908A (en) * | 2020-12-31 | 2022-03-29 | 江苏沪宁钢机股份有限公司 | Longitudinal and transverse partition plate inside super-large-section box body and manufacturing method thereof |
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