CN112719795A - Manufacturing method of large steel box girder - Google Patents
Manufacturing method of large steel box girder Download PDFInfo
- Publication number
- CN112719795A CN112719795A CN202011501542.9A CN202011501542A CN112719795A CN 112719795 A CN112719795 A CN 112719795A CN 202011501542 A CN202011501542 A CN 202011501542A CN 112719795 A CN112719795 A CN 112719795A
- Authority
- CN
- China
- Prior art keywords
- welding
- manufacturing
- steel box
- unit element
- shaped rib
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 46
- 239000010959 steel Substances 0.000 title claims abstract description 46
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 43
- 238000003466 welding Methods 0.000 claims abstract description 68
- 238000000034 method Methods 0.000 claims abstract description 24
- 238000010276 construction Methods 0.000 claims abstract description 9
- 238000012545 processing Methods 0.000 claims abstract description 7
- 238000003754 machining Methods 0.000 claims abstract description 4
- 238000012360 testing method Methods 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims description 9
- 210000001503 joint Anatomy 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 238000004458 analytical method Methods 0.000 claims description 3
- 239000010953 base metal Substances 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- 238000007689 inspection Methods 0.000 claims description 3
- 239000000049 pigment Substances 0.000 claims description 3
- 230000009194 climbing Effects 0.000 abstract description 2
- 238000009434 installation Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
Classifications
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention relates to a manufacturing method of a large-scale steel box girder, which comprises the following steps of manufacturing unit elements, assembling and pre-splicing girder segments, hoisting and welding the steel box girder on a construction site, wherein the manufacturing method of the unit elements comprises the following steps: designing a drawing: designing a drawing by using AUTOCAD software, modeling, determining a theoretical size, and determining welding and machining compensation quantities; and (3) analyzing the manufacturability: A. welding manufacturability test, B, measured data of the manufactured bridge, C, and part processing requirements. Compared with the prior art, the invention adopts a forward mounting method and a reverse mounting method, namely, the base plate unit element is firstly assembled, and then the web plate unit element, the diaphragm plate unit element, the panel unit element and the cantilever unit element are sequentially assembled, wherein the cantilever unit element adopts the reverse mounting method. The method has the advantage of enabling most of the welding seams to be welded in a horizontal or climbing position. During welding, the welding deformation is effectively controlled by using the principles of constraint, self-constraint, strong constraint and flexible constraint, so that all geometric size deviations of all steel box girders are in a very small range.
Description
Technical Field
The invention relates to the technical field of large-scale steel box girders, in particular to a manufacturing method of a large-scale steel box girder.
Background
The steel box girder is also called steel plate box girder, and is a common structural form of a large-span bridge. The steel box girder is generally used on a bridge with a large span and is called a steel box girder because the shape of the steel box girder is like a box, in a large-span cable support bridge, the span of the steel box girder reaches hundreds of meters and thousands of meters, the steel box girder is generally manufactured and installed by being divided into a plurality of beam sections, the cross section of the steel box girder has the characteristics of wide width and flat shape, the height-width ratio reaches about 1:10, and the steel box girder is generally formed by connecting a top plate, a bottom plate, a web plate, a transverse clapboard, a longitudinal clapboard, a stiffening rib and the like in a full welding mode. The top plate is an orthotropic bridge deck composed of a cover plate and longitudinal stiffening ribs.
The large steel box girder is assembled and welded by adopting a multi-section assembling method in the construction process, the engineering speed is high in the assembling process, but the risk is high, the staggered welding is easy to occur, and the rework risk is high, so that the manufacturing method of the large steel box girder is provided.
Disclosure of Invention
The invention aims to provide a manufacturing method of a large steel box girder, which aims to solve the problems that the large steel box girder proposed in the background technology adopts a multi-section assembling method for assembling and welding in the construction process, the engineering speed is high in the assembling process, but the risk is high, the staggered welding is easy to occur, and the rework risk is high.
In order to achieve the purpose, the invention provides the following technical scheme: the manufacturing method of the large-scale steel box girder comprises the steps of manufacturing unit pieces, assembling and pre-splicing beam sections, hoisting and welding the steel box girder on the construction site, wherein the manufacturing method comprises the steps of
Manufacturing a unit piece:
1) and designing a drawing: designing a drawing by using AUTOCAD software, modeling, determining a theoretical size, and determining welding and machining compensation quantities;
2) and analyzing the manufacturability: A. welding manufacturability test, B, measured data of the manufactured bridge, C, part processing requirements;
3) group analysis: A. a part blanking mode, a part processing mode, a beam section and part demand;
3) and (3) analyzing the material utilization rate: A. the numerical control blanking parts are automatically analyzed by numerical control programming software, the area proportion of AUTOCAD software is used as a judgment basis for the non-numerical control blanking parts B, and the sleeve materials which do not meet the conditions C must be approved by a master engineer before passing through.
Preferably, the preferred, the beam section assembling and pre-splicing specific steps include:
6) scribing: drawing a single element longitudinal and transverse datum line, a structure assembly line, a port inspection line and the like according to the requirements of a single element manufacturing drawing, wherein a measuring tool within the measuring validity period is required for marking.
7) Assembling the T-shaped rib plate: and aligning the T-shaped rib plate with the port line of the T-shaped rib plate at one end for assembling and spot welding. Measuring the length of each T-shaped rib plate needing to be lengthened, and manufacturing the T-shaped rib plate according to the actual measurement length;
8) and lengthening the longitudinal T-shaped rib plate: and (5) lengthening the longitudinal T-shaped rib plate and performing spot welding. And welding butt-joint welding seams between the T-shaped rib plates. Lengthening fillet welds between the longitudinal T-shaped rib plates and the bottom plate;
9) unit two pieces (arm picking only): two bottom plate unit pieces are spliced on a platform;
10) and standard sample: the mark should be punched as required.
3. The manufacturing method of the large steel box girder according to claim 2, wherein the manufacturing method comprises the following steps: and 80mm of non-welding is reserved at two ends of the beam section assembly pre-spliced T-shaped rib plate respectively.
Preferably, in the unit element manufacturing, the flame straightening is used for the unit element deformation, the straightening temperature is controlled to be 600-800 ℃, and the natural cooling is carried out.
Preferably, the standard: the mark is made of a pigment or ink pen which is not easy to fade.
Preferably, the concrete steps of hoisting and welding the steel box girder at the construction site comprise:
1) and the welding sequence adopts symmetrical welding, deformation and reverse deformation are fully considered, the welding direction is required to be the same, and the welding speed is consistent. Intermittent symmetrical welding can be adopted when necessary;
2) the bottom plate, the T-shaped rib plate, the lengthened longitudinal T-shaped rib plate, the top plate and the butt weld joint are welded by adopting submerged arc automatic welding as much as possible; selecting welding materials and groove forms according to the principle of equal strength with the tensile strength of base metal, wherein V-shaped grooves are adopted for butt joint of steel plates, and the back of the steel plates is cleaned by carbon arc gouging;
3) the butt joint and angle joint welding seams of the stiffening members of the steel box girder bottom plate, the web plate and the top plate are welded by adopting CO2 gas shielded welding;
4) the hoisting adopts a forward mounting method and a reverse mounting method, namely, a base plate unit element is firstly assembled, and then a web plate unit element, a diaphragm plate unit element, a panel unit element and a cantilever unit element are sequentially assembled, wherein the cantilever unit element adopts the reverse mounting method.
Compared with the prior art, the invention has the following beneficial effects:
the method adopts a positive installation method and a negative installation method, namely, a base plate unit element is assembled firstly, and then a web plate unit element, a diaphragm plate unit element, a panel unit element and a cantilever unit element are assembled in sequence, wherein the cantilever unit element adopts the negative installation method. The method has the advantage of enabling most of the welding seams to be welded in a horizontal or climbing position. During welding, the welding deformation is effectively controlled by using the principles of constraint, self-constraint, strong constraint and flexible constraint, all geometric size deviations of all steel box girders are in a very small range, and the sizes of the relative segment box girder ports meet the requirement of accurate matching.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a technical scheme that: the manufacturing method of the large-scale steel box girder comprises the steps of manufacturing unit pieces, assembling and pre-splicing beam sections, hoisting and welding the steel box girder on the construction site, wherein the manufacturing method comprises the steps of
Manufacturing a unit piece:
1) and designing a drawing: designing a drawing by using AUTOCAD software, modeling, determining a theoretical size, and determining welding and machining compensation quantities;
2) and analyzing the manufacturability: A. welding manufacturability test, B, measured data of the manufactured bridge, C, part processing requirements;
3) group analysis: A. a part blanking mode, a part processing mode, a beam section and part demand;
3) and (3) analyzing the material utilization rate: A. the numerical control blanking parts are automatically analyzed by numerical control programming software, the area proportion of AUTOCAD software is used as a judgment basis for the non-numerical control blanking parts B, and the sleeve materials which do not meet the conditions C must be approved by a master engineer before passing through.
Preferably, the preferred, the beam section assembling and pre-splicing specific steps include:
11) scribing: drawing a single element longitudinal and transverse datum line, a structure assembly line, a port inspection line and the like according to the requirements of a single element manufacturing drawing, wherein a measuring tool within the measuring validity period is required for marking.
12) Assembling the T-shaped rib plate: and aligning the T-shaped rib plate with the port line of the T-shaped rib plate at one end for assembling and spot welding. Measuring the length of each T-shaped rib plate needing to be lengthened, and manufacturing the T-shaped rib plate according to the actual measurement length;
13) and lengthening the longitudinal T-shaped rib plate: and (5) lengthening the longitudinal T-shaped rib plate and performing spot welding. And welding butt-joint welding seams between the T-shaped rib plates. Lengthening fillet welds between the longitudinal T-shaped rib plates and the bottom plate;
14) unit two pieces (arm picking only): two bottom plate unit pieces are spliced on a platform;
15) and standard sample: the mark should be punched as required.
3. The manufacturing method of the large steel box girder according to claim 2, wherein the manufacturing method comprises the following steps: and 80mm of non-welding is reserved at two ends of the beam section assembly pre-spliced T-shaped rib plate respectively.
Preferably, in the unit element manufacturing, the flame straightening is used for the unit element deformation, the straightening temperature is controlled to be 600-800 ℃, and the natural cooling is carried out.
Preferably, the standard: the mark is made of a pigment or ink pen which is not easy to fade.
Preferably, the concrete steps of hoisting and welding the steel box girder at the construction site comprise:
1) and the welding sequence adopts symmetrical welding, deformation and reverse deformation are fully considered, the welding direction is required to be the same, and the welding speed is consistent. Intermittent symmetrical welding can be adopted when necessary;
2) the bottom plate, the T-shaped rib plate, the lengthened longitudinal T-shaped rib plate, the top plate and the butt weld joint are welded by adopting submerged arc automatic welding as much as possible; selecting welding materials and groove forms according to the principle of equal strength with the tensile strength of base metal, wherein V-shaped grooves are adopted for butt joint of steel plates, and the back of the steel plates is cleaned by carbon arc gouging;
3) the butt joint and angle joint welding seams of the stiffening members of the steel box girder bottom plate, the web plate and the top plate are welded by adopting CO2 gas shielded welding;
4) the hoisting adopts a forward mounting method and a reverse mounting method, namely, a base plate unit element is firstly assembled, and then a web plate unit element, a diaphragm plate unit element, a panel unit element and a cantilever unit element are sequentially assembled, wherein the cantilever unit element adopts the reverse mounting method.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.
Claims (6)
1. A manufacturing method of a large-scale steel box girder is characterized by comprising the following steps: the manufacturing method comprises the steps of manufacturing a single element, assembling and pre-splicing beam sections, hoisting and welding the steel box beam on the construction site, wherein
Manufacturing a unit piece:
1) and designing a drawing: designing a drawing by using AUTOCAD software, modeling, determining a theoretical size, and determining welding and machining compensation quantities;
2) and analyzing the manufacturability: A. welding manufacturability test, B, measured data of the manufactured bridge, C, part processing requirements;
3) group analysis: A. a part blanking mode, a part processing mode, a beam section and part demand;
3) and (3) analyzing the material utilization rate: A. the numerical control blanking parts are automatically analyzed by numerical control programming software, the area proportion of AUTOCAD software is used as a judgment basis for the non-numerical control blanking parts B, and the sleeve materials which do not meet the conditions C must be approved by a master engineer before passing through.
2. The manufacturing method of the large steel box girder according to claim 1, wherein the manufacturing method comprises the following steps: the beam section assembling and pre-splicing specific steps comprise:
1) scribing: drawing a unit longitudinal and transverse datum line, a structure assembly line, a port inspection line and the like according to the requirements of a unit manufacturing drawing, wherein a measuring tool within the measuring validity period is required for scribing;
2) assembling the T-shaped rib plate: assembling and spot-welding the T-shaped rib plates aligned with the port line of the T-shaped rib plate at one end, measuring the length of each T-shaped rib plate needing to be lengthened, and manufacturing T-shaped rib plates according to the measured length;
3) and lengthening the longitudinal T-shaped rib plate: lengthening longitudinal T-shaped rib plates, performing spot welding, welding butt welding seams among the T-shaped rib plates, and lengthening fillet welding seams between the longitudinal T-shaped rib plates and the bottom plate;
4) unit two pieces (arm picking only): two bottom plate unit pieces are spliced on a platform;
5) and standard sample: the mark should be punched as required.
3. The manufacturing method of the large steel box girder according to claim 2, wherein the manufacturing method comprises the following steps: and 80mm of non-welding is reserved at two ends of the beam section assembly pre-spliced T-shaped rib plate respectively.
4. The manufacturing method of the large steel box girder according to claim 2, wherein the manufacturing method comprises the following steps: in the unit element manufacturing, the unit element deformation is corrected by flame, the correction temperature is controlled to be 600-800 ℃, and the unit element is naturally cooled.
5. The manufacturing method of the large steel box girder according to claim 2, wherein the manufacturing method comprises the following steps: the standard sample comprises: the mark is made of a pigment or ink pen which is not easy to fade.
6. The manufacturing method of the large steel box girder according to claim 1, wherein the manufacturing method comprises the following steps: the concrete steps of hoisting and welding the steel box girder in the construction site comprise:
1) the welding sequence adopts symmetrical welding, deformation and reverse deformation are fully considered, the welding directions are required to be the same, the welding speed is consistent, and intermittent symmetrical welding can be adopted if necessary;
2) the bottom plate, the T-shaped rib plate, the lengthened longitudinal T-shaped rib plate, the top plate and the butt weld joint are welded by adopting submerged arc automatic welding as much as possible; selecting welding materials and groove forms according to the principle of equal strength with the tensile strength of base metal, wherein V-shaped grooves are adopted for butt joint of steel plates, and the back of the steel plates is cleaned by carbon arc gouging;
3) the butt joint and angle joint welding seams of the stiffening members of the steel box girder bottom plate, the web plate and the top plate are welded by adopting CO2 gas shielded welding;
4) the hoisting adopts a forward mounting method and a reverse mounting method, namely, a base plate unit element is firstly assembled, and then a web plate unit element, a diaphragm plate unit element, a panel unit element and a cantilever unit element are sequentially assembled, wherein the cantilever unit element adopts the reverse mounting method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011501542.9A CN112719795A (en) | 2020-12-17 | 2020-12-17 | Manufacturing method of large steel box girder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011501542.9A CN112719795A (en) | 2020-12-17 | 2020-12-17 | Manufacturing method of large steel box girder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112719795A true CN112719795A (en) | 2021-04-30 |
Family
ID=75603298
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011501542.9A Pending CN112719795A (en) | 2020-12-17 | 2020-12-17 | Manufacturing method of large steel box girder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112719795A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113458718A (en) * | 2021-06-07 | 2021-10-01 | 中铁十八局集团隧道工程有限公司 | Steel box girder manufacturing process |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104652284A (en) * | 2015-01-09 | 2015-05-27 | 安徽水安建设集团股份有限公司 | Reverse splicing construction method for steel box girder |
| WO2018072584A1 (en) * | 2016-10-20 | 2018-04-26 | 南通振华重型装备制造有限公司 | Construction technology for sliding frame of cantilever beam for jack-up drilling rig |
| CN208517830U (en) * | 2018-03-12 | 2019-02-19 | 湖州市交通工程建设集团有限公司 | A kind of Prebending type bridge formwork |
| CN110170799A (en) * | 2019-06-04 | 2019-08-27 | 上海绿地建筑钢结构有限公司 | Steel box-girder manufacture craft |
| 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 |
-
2020
- 2020-12-17 CN CN202011501542.9A patent/CN112719795A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104652284A (en) * | 2015-01-09 | 2015-05-27 | 安徽水安建设集团股份有限公司 | Reverse splicing construction method for steel box girder |
| WO2018072584A1 (en) * | 2016-10-20 | 2018-04-26 | 南通振华重型装备制造有限公司 | Construction technology for sliding frame of cantilever beam for jack-up drilling rig |
| CN208517830U (en) * | 2018-03-12 | 2019-02-19 | 湖州市交通工程建设集团有限公司 | A kind of Prebending type bridge formwork |
| CN110170799A (en) * | 2019-06-04 | 2019-08-27 | 上海绿地建筑钢结构有限公司 | Steel box-girder manufacture craft |
| 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 |
Non-Patent Citations (3)
| Title |
|---|
| 季华荣等: "苏州高架桥工程钢箱梁制作技术", 《钢结构》 * |
| 武芳文等: "曲线桥单箱多室钢箱梁制作技术与质量控制", 《铁道建筑》 * |
| 熊伍能: "飞龙岛大桥钢箱梁制造施工技术", 《企业导报》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113458718A (en) * | 2021-06-07 | 2021-10-01 | 中铁十八局集团隧道工程有限公司 | Steel box girder manufacturing process |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108049302B (en) | A kind of manufacturing method of full welding steel case and full bolt truss combined bridge lower edge steel box-girder | |
| CN102277825B (en) | Steel truss bridge and method for fabricating same | |
| CN111496405B (en) | Processing and manufacturing method of split type steel box girder | |
| CN108103938B (en) | A kind of double deck module solid trial assembly method of large steel girder | |
| CN107498269B (en) | A kind of large-scale ship reception chamber manufacturing method suitable for dry type ship compartment room | |
| CN104060523A (en) | Ultra-large type bridge box girder component, dedicated jig frame and assembling method thereof | |
| CN108708497A (en) | A kind of large span ladder type roofing steel truss stand manufacturing method | |
| CN202099719U (en) | Steel truss bridge | |
| CN111254835A (en) | Continuous matching construction method for steel box girder segments in factory | |
| CN112719795A (en) | Manufacturing method of large steel box girder | |
| CN115008053A (en) | Machining and manufacturing method for curved variable-section steel box girder | |
| CN107199437A (en) | Preparation method of steel anchor beam segment | |
| CN114043171B (en) | Manufacturing method of curve cable tower steel anchor box | |
| CN110695558B (en) | Manufacturing method of suspension bridge main cable saddle | |
| CN115262973A (en) | Construction method of multidirectional multi-curvature large-span curved surface latticed shell system | |
| CN115455771B (en) | Deformation error control method caused by temperature effect in manufacturing of large-section steel box girder | |
| CN107012951B (en) | Connection node structure and method for main truss and secondary truss in space pipe truss | |
| CN117182461A (en) | Manufacturing and construction control method for small-curvature high-pier continuous steel box girder | |
| CN114043170B (en) | Manufacturing method of hexagonal steel box arch | |
| CN114164759B (en) | Method for manufacturing bridge anchoring structure | |
| CN111576221A (en) | Manufacturing process of self-propelled movable formwork main beam structure and main beam structure | |
| CN115365690B (en) | Construction method of large-section steel S690 high-strength steel box-type arch rib of large-scale steel bridge | |
| CN113894452A (en) | Y-shaped tree-shaped special-shaped thick plate steel structure column | |
| CN108381128B (en) | Manufacturing method of I-shaped weather-resistant steel edge girder with lifting point penetrating out | |
| CN112982138A (en) | Split bridge deck jig frame device of steel truss suspension bridge and manufacturing method of steel truss suspension bridge |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210430 |