CN116201029A - Manufacturing method of large-section thin-wall special-shaped steel shell tower segment - Google Patents
Manufacturing method of large-section thin-wall special-shaped steel shell tower segment Download PDFInfo
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- CN116201029A CN116201029A CN202310242840.8A CN202310242840A CN116201029A CN 116201029 A CN116201029 A CN 116201029A CN 202310242840 A CN202310242840 A CN 202310242840A CN 116201029 A CN116201029 A CN 116201029A
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/14—Towers; Anchors ; Connection of cables to bridge parts; Saddle supports
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Abstract
The invention discloses a manufacturing method of a large-section thin-wall special-shaped steel shell tower segment, which comprises the steps of firstly dividing the segment into a plurality of blocks, then manufacturing each block component part, arranging a beam baseline, a longitudinal baseline and each block assembly position line on an assembly platform, and fixing a supporting upright post and an inclined positioning bracket; the outer wall plate units of the inclined straight wall blocks are positioned and fixed in an angle through the positioning brackets; then hoisting and fixing the outer wall plate units of the rest straight wall blocks and adjusting the verticality of the outer wall plate units through the supporting upright posts; hoisting and fixing the inner wallboard units corresponding to all the outer wallboard units, adjusting and fixing the inner wallboard units through adjusting stay bars, and welding connection angle steel between the inner wallboard units and the outer wallboard units; sequentially hoisting and fixing the outer wall plate units and the inner wall plate units of the rest vertical curved wall blocks according to the same method, and welding connection angle steel between the inner wall plate units and the outer wall plate units; and finally welding the blocks to form the segment. The steel shell tower segment is divided into blocks which are easy to assemble, so that the manufacturing process is simplified, and the production efficiency is improved.
Description
Technical Field
The invention belongs to the technical field of bridge steel shell tower manufacturing, and particularly relates to a manufacturing method of a large-section thin-wall special-shaped steel shell tower segment.
Background
Along with the development of bridge construction technology at home and abroad, a large bridge cable tower is developed into a steel structure from an initial concrete structure, and in recent years, a thin-wall steel shell combined structure cable tower is developed, so that the advantages of steel and concrete are fully exerted, and the thin-wall steel shell combined structure cable tower has the characteristics of high construction efficiency and background construction. Although China has made great progress in the manufacture of steel cable towers, the manufacture of steel shell towers is still in an initial stage, and particularly, the large-section double-thin-wall special-shaped steel shell towers are more technical blank.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a manufacturing method of a large-section thin-wall special-shaped steel shell tower segment. The technical problems to be solved by the invention are realized by the following technical scheme:
a manufacturing method of a large-section thin-wall special-shaped steel shell tower segment comprises the following steps:
step 1: vertically dividing the segment into one inclined straight wall block, two first vertical curved wall blocks, at least two vertical straight wall blocks, two second vertical curved wall blocks and one third vertical curved wall block;
step 2: manufacturing a first straight wall inner wall plate unit and a first straight wall outer wall plate unit for composing the inclined straight wall block; manufacturing a first curved wall inner wall plate unit and a first curved wall outer wall plate unit which are used for forming the first vertical curved wall block; fabricating a second straight wall inner wall plate unit and a second straight wall outer wall plate unit for constituting the vertical straight wall block; manufacturing a second curved wall inner wall plate unit and a second curved wall outer wall plate unit which are used for forming the second vertical curved wall block; manufacturing a third curved wall inner wall plate unit and a third curved wall outer wall plate unit which are used for forming the third vertical curved wall block;
step 3: scribing a beam baseline and a longitudinal baseline on an assembly platform, and scribing assembly position lines of the inclined straight wall block, the two first vertical curved wall blocks, the at least two vertical straight wall blocks, the two second vertical curved wall blocks and the one third vertical curved wall block on the assembly platform by taking the beam baseline and the longitudinal baseline as references;
step 4: fixing a plurality of support columns and a plurality of inclined positioning brackets on an assembly platform, wherein the support columns are arranged along the inner sides of the assembly position lines, and the support columns are horizontally provided with adjusting stay bars; the inclined positioning bracket is arranged along the outer side of the assembly position line and is positioned at the outer side of the assembly position of the inclined straight wall block;
step 5: firstly, hoisting the first straight wall outer wall plate unit to the inner side of the inclined positioning bracket, positioning the first straight wall outer wall plate unit by taking an assembly position line corresponding to the inclined straight wall block as a reference, then leaning against an inclined plane at the inner side of the inclined positioning bracket, accurately adjusting the inclined plane to ensure that the deviation between the lower end of the first straight wall outer wall plate unit and the assembly position line is less than or equal to 2mm, and temporarily fixing the first straight wall outer wall plate unit and the inclined positioning bracket through a positioning plate;
step 6: respectively hoisting the two second straight wall outer wall plate units to the outer sides of the supporting columns, positioning the two second straight wall outer wall plate units by taking an assembly position line corresponding to the vertical wall block as a reference, adjusting verticality by the adjusting stay bar, and then temporarily welding and fixing the second straight wall outer wall plate units with an assembly platform;
step 7: hoisting the first straight wall inner wall plate unit to the inner side of the first straight wall outer wall plate unit and the outer side of the supporting upright post, positioning by taking an assembly position line corresponding to the inclined straight wall block as a reference, adjusting the inclined angle by the adjusting stay rod, and welding a connecting angle steel between the first straight wall inner wall plate unit and the first straight wall outer wall plate unit from bottom to top to form the inclined straight wall block; hoisting the two second straight wall inner wall plate units to the inner sides of the two second straight wall outer wall plate units and the outer sides of the supporting columns respectively, adjusting and supporting by the adjusting stay bars after positioning by taking the assembly position lines corresponding to the vertical wall blocks as references, and welding connecting angle steel between the second straight wall inner wall plate units and the second straight wall outer wall plate units from bottom to top to form two vertical wall blocks respectively;
step 8: hoisting the two first curved wall outer wall plate units, the two second curved wall outer wall plate units and one third curved wall outer wall plate unit in place in sequence according to the method in the step 6;
step 9: sequentially hoisting the two first curved wall inner wall plate units, the two second curved wall inner wall plate units and the third curved wall inner wall plate unit in place according to the method in the step 7, and then welding connecting angle steel between the inner wall plate units and the outer wall plate units from bottom to top to form two first vertical curved wall blocks, two second vertical curved wall blocks and a third vertical curved wall block respectively;
step 10: and after all the blocks are detected to be qualified, welding and connecting butt welds among the blocks to form the sections.
Further, vertical base points are arranged on the outer contour lines and the inner contour lines of the assembly position lines of all the blocks, vertical base lines are marked on the outer walls of all the plate units, and the lower ends of the vertical base lines are aligned with the vertical base points.
Further, the adjusting stay rod can be adjusted in a telescopic way.
Further, the inclined positioning bracket is of a triangular structure, and the inner inclined surface of the inclined positioning bracket is consistent with the inclination of the inclined straight wall block.
Further, the vertical base point is located at a position intermediate the outer and inner contours of the assembly position lines of all blocks, and the vertical base line is located at a position intermediate the outer walls of all plate units.
Further, in the step 8 and the step 9, when the deviation between the curved wall plate unit and the corresponding assembly position line is large, the thermal correction process is adopted to adjust, so that the deviation between the curved wall plate unit and the corresponding assembly position line is less than or equal to 2mm.
The invention has the beneficial effects that:
1. the large-section thin-wall special-shaped steel shell tower segment is divided into blocks which are easy to assemble, so that the manufacturing process is simplified, and the production efficiency is improved;
2. the assembly quality of the block is guaranteed by optimizing the assembly sequence of the plate units, and the manufacturing precision and quality of the steel shell tower segment are improved, so that the control problem of the manufacturing precision of the large-section thin-wall special-shaped steel shell tower is solved;
3. the method is simple to operate, high in practicability and good in effect through practical verification.
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Drawings
FIG. 1 is a schematic structural view of a steel shell tower segment of the present invention;
FIG. 2 is a schematic structural view of a steel shell tower segment assembly platform;
fig. 3-6 are schematic views of a manufacturing process for a profiled steel shell tower segment.
Reference numerals illustrate:
1-a sloping straight walled block; 2-a first vertical curved wall block; 3-vertical straight wall blocks; 4-a second vertical curved wall block; 5-a third vertical curved wall block; 6-assembling a platform; 7-supporting the upright post; 8-tilting a positioning bracket; 9-vertical baseline; 1-1-a first straight wall inner panel unit; 1-2-a first straight wall outer wall panel unit; 2-1-a first curved wall inner panel unit; 2-2-a first curved wall outer panel unit; 3-1-a second straight wall inner wall panel unit; 3-2-a second straight wall exterior wall panel unit; 4-1-second curved wall inner wall panel units; 4-2-second curved wall outer wall panel units; 5-1-a third curved wall inner wall panel unit; 5-2-third curved wall outer wall panel units; 6-1-cross-baseline; 6-2-longitudinal baseline; 6-3-assembly position line; 6-4-vertical base points; 7-1-adjusting stay bar.
Detailed Description
The present invention will be described in further detail with reference to specific examples, but embodiments of the present invention are not limited thereto.
Referring to fig. 1 to 6, the embodiment of the invention provides a method for manufacturing a large-section thin-wall special-shaped steel shell tower segment, wherein the thickness of an outer wall plate of the special-shaped steel shell tower segment is 16-40 mm, the thickness of an inner wall plate is 8-10 mm, and the section size is 10m multiplied by 10m, and the method specifically comprises the following steps:
step 1: the steel shell tower segment is vertically divided into an inclined straight wall block 1, two first vertical curved wall blocks 2, two vertical straight wall blocks 3, two second vertical curved wall blocks 4 and a third vertical curved wall block 5;
step 2: manufacturing a first straight wall inner wall plate unit 1-1 and a first straight wall outer wall plate unit 1-2 for composing the inclined straight wall block 1; manufacturing a first curved wall inner wall plate unit 2-1 and a first curved wall outer wall plate unit 2-2 for composing the first vertical curved wall block 2; fabricating a second straight wall inner wall plate unit 3-1 and a second straight wall outer wall plate unit 3-2 for composing the vertical straight wall block 3; making a second curved wall inner wall plate unit 4-1 and a second curved wall outer wall plate unit 4-2 for composing the second vertical curved wall block 4; manufacturing a third curved wall inner wall plate unit 5-1 and a third curved wall outer wall plate unit 5-2 for composing the third vertical curved wall block 5;
step 3: scribing a cross base line 6-1 and a vertical base line 6-2 on an assembly platform 6, and scribing assembly position lines 6-3 of the inclined straight wall block 1, the two first vertical curved wall blocks 2, the at least two vertical straight wall blocks 3, the two second vertical curved wall blocks 4 and the one third vertical curved wall block 5 on the assembly platform 6 based on the cross base line 6-1 and the vertical base line 6-2;
step 4: a plurality of supporting columns 7 and a plurality of inclined positioning brackets 8 are fixed on the assembly platform 6, the supporting columns 7 are arranged along the inner side of the assembly position line 6-3, and the supporting columns 7 are horizontally provided with adjusting supporting rods 7-1; the adjusting stay bars 7-1 can be adjusted in a telescopic manner, so that the angle of the inner wallboard unit and the angle of the outer wallboard unit can be adjusted at the same time; the telescopic structure of the adjusting support rod 7-1 is a common structure, and the embodiment of the present invention is not specifically described herein, and the inclined positioning bracket 8 is disposed along the outer side of the assembly position line 6-3 and is located at the outer side of the assembly position of the inclined straight wall block 1;
the installation height of the adjusting stay bar 7-1 is 1/3 times of the height of the supporting upright post 7, so that the angles of the inner wall plate unit and the outer wall plate unit can be accurately adjusted and stably supported.
The inclined positioning bracket is of a triangular structure, and the inner inclined surface of the inclined positioning bracket is consistent with the inclination of the inclined straight wall block 1, so that the installation accuracy of the inclined straight wall block 1 is ensured.
Step 5: firstly, hoisting the first straight wall outer wall plate unit 1-2 to the inner side of the inclined positioning bracket 8, positioning by taking an assembly position line corresponding to the inclined wall block 1 as a reference, then leaning against an inclined plane at the inner side of the inclined positioning bracket 8, accurately adjusting to ensure that the deviation between the lower end of the first straight wall outer wall plate unit 1-2 and the assembly position line is less than or equal to 2mm, checking a gap between the first straight wall outer wall plate unit 1-2 and the inclined positioning bracket 8, and temporarily fixing the first straight wall outer wall plate unit 1-2 with the inclined positioning bracket 8 through a positioning plate after the gap is less than or equal to 2 mm;
step 6: respectively hoisting the two second straight wall outer wall plate units 3-2 to the outer sides of the supporting upright posts 7, positioning by taking the assembly position line corresponding to the vertical wall block 3 as a reference, adjusting the verticality by the adjusting stay bars 7-1, and then temporarily welding and fixing with the assembly platform 6; two adjacent second straight wall outer wall plate units 3-2 are temporarily connected by a horse plate; and supports the plate unit by a chain block, a wire rope having one end fixed to one hook of the chain block and the other end fixed to the second straight wall outer wall plate unit 3-2.
Step 7: hoisting the first straight wall inner wall plate unit 1-1 to the inner side of the first straight wall outer wall plate unit 1-2 and the outer side of the supporting upright post 7, positioning by taking an assembly position line corresponding to the inclined straight wall block 1 as a reference, adjusting an inclined angle by the adjusting stay rod 7-1, fixing the adjusting stay rod 7-1 and the first straight wall inner wall plate unit 1-1, spot-welding and fixing the first straight wall inner wall plate unit 1-1 and an assembly platform, and welding connecting angle steel between the first straight wall inner wall plate unit 1-1 and the first straight wall outer wall plate unit 1-2 from bottom to top to form the inclined straight wall block 1;
hoisting the two second straight wall inner wall plate units 3-1 to the inner sides of the two second straight wall outer wall plate units 3-2 and the outer sides of the supporting columns 7 respectively, positioning by taking the assembly position line corresponding to the vertical wall block 3 as a reference, adjusting the verticality by the adjusting stay rod 7-1, fixing the adjusting stay rod 7-1 with the second straight wall inner wall plate units 3-1, fixing the second straight wall inner wall plate units 3-1 with an assembly platform by spot welding, and welding connecting angle steel between the second straight wall inner wall plate units 3-1 and the second straight wall outer wall plate units 3-2 from bottom to top to form two vertical wall blocks 3 respectively;
step 8: hoisting the two first curved wall outer wall plate units 2-2, the two second curved wall outer wall plate units 4-2 and the third curved wall outer wall plate unit 5-2 in place in sequence according to the method in the step 6, and fixing the two first curved wall outer wall plate units, the two second curved wall outer wall plate units and the third curved wall outer wall plate units with an assembling platform in a spot welding manner;
step 9: hoisting and fixing the two first curved wall inner wall plate units 2-1, the two second curved wall inner wall plate units 4-1 and the third curved wall inner wall plate unit 5-1 in place in sequence according to the method in the step 7, and then welding connecting angle steel between the inner wall plate units and the outer wall plate units from bottom to top to form two first vertical curved wall blocks 2, two second vertical curved wall blocks 4 and a third vertical curved wall block 5 respectively;
in the step 8 and the step 9, when the local position of the curved wall plate unit deviates greatly from the corresponding assembly position line, a thermal correction process is adopted for adjustment, so that the deviation between the curved wall plate unit and the respective assembly position line is less than or equal to 2mm, and the manufacturing precision of the steel shell tower segment is ensured.
Step 10: and detecting the port sizes, verticality and steel plate dislocation on all the blocks, and welding butt welds among the blocks to form the steel shell tower section after all the blocks are detected to be qualified.
Further, vertical base points 6-4 are arranged on the outer contour line and the inner contour line of the assembly position line 6-3 of all the blocks, the vertical base points 6-4 are located at the middle positions of the outer contour line and the inner contour line of the assembly position line of each block, vertical base lines 9 are drawn on the outer walls of all the plate units, the vertical base lines 9 are located at the middle positions of the outer walls of all the plate units, and the lower ends of the vertical base lines are aligned with the vertical base points 6-4, so that the plate units of each block can be positioned quickly.
The assembly scheme and the assembly sequence designed by the embodiment of the invention solve the difficult problem of control of the manufacturing precision of the large-section thin-wall special-shaped steel shell tower, thereby improving the manufacturing precision and the manufacturing quality of the special-shaped steel shell tower.
The foregoing is a further detailed description of the invention in connection with the preferred embodiments, and it is not intended that the invention be limited to the specific embodiments described. It will be apparent to those skilled in the art that several simple deductions or substitutions may be made without departing from the spirit of the invention, and these should be considered to be within the scope of the invention.
Claims (6)
1. The manufacturing method of the large-section thin-wall special-shaped steel shell tower section is characterized by comprising the following steps of:
step 1: dividing the segment vertically into one inclined straight wall block (1), two first vertical curved wall blocks (2), at least two vertical straight wall blocks (3), two second vertical curved wall blocks (4) and one third vertical curved wall block (5);
step 2: -making a first straight wall inner wall panel unit (1-1) and a first straight wall outer wall panel unit (1-2) for composing the inclined straight wall block (1); -making a first curved wall inner wall panel unit (2-1) and a first curved wall outer wall panel unit (2-2) for composing the first vertical curved wall block (2); -making a second straight wall inner wall panel unit (3-1) and a second straight wall outer wall panel unit (3-2) for constituting the vertical straight wall block (3); -making a second curved wall inner wall panel unit (4-1) and a second curved wall outer wall panel unit (4-2) for composing the second vertical curved wall block (4); -making a third curved wall inner wall panel unit (5-1) and a third curved wall outer wall panel unit (5-2) for composing the third vertical curved wall block (5);
step 3: drawing a cross base line (6-1) and a longitudinal base line (6-2) on an assembly platform (6), and drawing assembly position lines (6-3) of the inclined straight wall block (1), the two first vertical curved wall blocks (2), the at least two vertical straight wall blocks (3), the two second vertical curved wall blocks (4) and the one third vertical curved wall block (5) on the assembly platform (6) by taking the cross base line (6-1) and the longitudinal base line (6-2) as references;
step 4: a plurality of supporting columns (7) and a plurality of inclined positioning brackets (8) are fixed on an assembly platform (6), the supporting columns (7) are arranged along the inner side of an assembly position line (6-3), and an adjusting stay bar (7-1) is horizontally arranged on the supporting columns (7); the inclined positioning bracket (8) is arranged along the outer side of the assembly position line (6-3) and is positioned at the outer side of the assembly position of the inclined straight wall block (1);
step 5: firstly, hoisting the first straight wall outer wall plate unit (1-2) to the inner side of the inclined positioning bracket (8), positioning by taking an assembly position line corresponding to the inclined straight wall block (1) as a reference, then leaning against an inclined plane at the inner side of the inclined positioning bracket (8), accurately adjusting to ensure that the deviation between the lower end of the first straight wall outer wall plate unit (1-2) and the assembly position line is less than or equal to 2mm, and temporarily fixing with the inclined positioning bracket (8) by a positioning plate;
step 6: hoisting two second straight wall outer wall plate units (3-2) to the outer sides of the supporting columns (7) respectively, positioning by taking an assembly position line corresponding to the vertical wall block (3) as a reference, adjusting verticality by the adjusting stay rod (7-1), and then temporarily welding and fixing with the assembly platform (6);
step 7: hoisting the first straight wall inner wall plate unit (1-1) to the inner side of the first straight wall outer wall plate unit (1-2) and the outer side of the supporting upright post (7), positioning by taking an assembly position line corresponding to the inclined straight wall block (1) as a reference, adjusting an inclination angle by the adjusting stay bar (7-1), and then welding connecting angle steel between the first straight wall inner wall plate unit (1-1) and the first straight wall outer wall plate unit (1-2) from bottom to top to form the inclined straight wall block (1); hoisting the two second straight wall inner wall plate units (3-1) to the inner sides of the two second straight wall outer wall plate units (3-2) and the outer sides of the supporting columns (7) respectively, positioning by taking the corresponding assembly position line of the vertical wall block (3) as a reference, adjusting and supporting by the adjusting stay rod (7-1), and then welding connecting angle steel between the second straight wall inner wall plate units (3-1) and the second straight wall outer wall plate units (3-2) from bottom to top to form two vertical wall blocks (3) respectively;
step 8: hoisting two first curved wall outer wall plate units (2-2), two second curved wall outer wall plate units (4-2) and one third curved wall outer wall plate unit (5-2) in place in sequence according to the method in the step 6;
step 9: according to the method in the step 7, after hoisting the two first curved wall inner wall plate units (2-1), the two second curved wall inner wall plate units (4-1) and the one third curved wall inner wall plate unit (5-1) in place in sequence, welding connecting angle steel between the inner wall plate units and the outer wall plate units from bottom to top to form two first vertical curved wall blocks (2), two second vertical curved wall blocks (4) and one third vertical curved wall block (5) respectively;
step 10: and after all the blocks are detected to be qualified, welding and connecting butt welds among the blocks to form the sections.
2. Method for manufacturing a large-section thin-walled profiled steel shell tower segment according to claim 1 characterized in that the outer contour and the inner contour of the assembly position line (6-3) of all blocks are provided with vertical base points (6-4), that the outer walls of all plate units are scored with vertical base lines (9), and that the lower ends of the vertical base lines (9) are aligned with the vertical base points (6-4).
3. The method for manufacturing a large-section thin-wall special-shaped steel shell tower segment according to claim 1, characterized in that the adjusting stay (7-1) is telescopically adjustable.
4. The method for manufacturing the large-section thin-wall special-shaped steel shell tower segment according to claim 1, wherein the inclined positioning bracket (8) is of a triangular structure, and the inner inclined surface of the inclined positioning bracket is consistent with the inclination of the inclined straight wall block (1).
5. Method for manufacturing a large-section thin-walled profiled steel shell tower segment according to claim 2, characterized in that the vertical base point (6-4) is located in the middle of the outer and inner contour of the assembly position line (6-3) of all blocks, and the vertical base line (9) is located in the middle of the outer wall of all plate units.
6. The method for manufacturing a large-section thin-wall special-shaped steel shell tower segment according to any one of claims 1 to 5, wherein in the step 8 and the step 9, when the deviation between the curved wall plate units and the corresponding assembly position lines is large, the method adopts a thermal correction process to adjust, so that the deviation between the curved wall plate units and the respective assembly position lines is less than or equal to 2mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310242840.8A CN116201029A (en) | 2023-03-14 | 2023-03-14 | Manufacturing method of large-section thin-wall special-shaped steel shell tower segment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310242840.8A CN116201029A (en) | 2023-03-14 | 2023-03-14 | Manufacturing method of large-section thin-wall special-shaped steel shell tower segment |
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| CN116201029A true CN116201029A (en) | 2023-06-02 |
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| CN202310242840.8A Pending CN116201029A (en) | 2023-03-14 | 2023-03-14 | Manufacturing method of large-section thin-wall special-shaped steel shell tower segment |
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