CN114472116A - Winter welding and coating construction method for steel truss girder and multi-type support - Google Patents
Winter welding and coating construction method for steel truss girder and multi-type support Download PDFInfo
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- CN114472116A CN114472116A CN202111551265.7A CN202111551265A CN114472116A CN 114472116 A CN114472116 A CN 114472116A CN 202111551265 A CN202111551265 A CN 202111551265A CN 114472116 A CN114472116 A CN 114472116A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/24—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2202/00—Metallic substrate
- B05D2202/10—Metallic substrate based on Fe
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2504/00—Epoxy polymers
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Abstract
The invention relates to a winter welding and coating construction method of a steel truss girder and a multi-type support, which comprises the steps of firstly welding the steel truss girder and a support short column, then welding the support short column and a fixed hinged support, and then welding the support short column and a one-way sliding hinged support; and after welding, adding an epoxy diluent into the oily paint to prepare a welding seam paint, and constructing the welding seam paint at the welding seam. The method of the invention has the advantages of flow construction process, simple symmetrical welding operation, strong applicability and good welding effect. The welding seam coating is reasonably prepared, the mixing proportion of the epoxy diluent in the welding seam coating is adjusted according to the environment temperature, the construction performance of the welding seam coating can be greatly adjusted, the same paintability of the welding seam coatings used in different environments is ensured, and the construction quality is ensured.
Description
Technical Field
The invention belongs to the technical field of building construction, particularly relates to welding construction of a steel truss girder and a support in winter construction, and particularly relates to a winter welding and coating construction method of the steel truss girder and a multi-type support.
Background
The steel has the characteristics of high strength, light dead weight, good integral rigidity and strong deformability, and is particularly suitable for building large-span, ultrahigh and extra-heavy buildings; the material has good homogeneity and isotropy, belongs to an ideal elastomer and most conforms to the basic assumption of general engineering mechanics; the material has good plasticity and toughness, can deform greatly and can bear dynamic load well; the construction period is short, the industrialization degree is high, and the specialized production with high mechanization degree can be carried out.
As a green and environment-friendly product, compared with the traditional concrete structure, the steel structure has the advantages of light dead weight, high strength, good anti-seismic performance and the like. The method is suitable for structures with smaller proportion of total load of live load points, and is more suitable for large-span space structures and high-rise structures and for construction on soft soil foundations. The method also conforms to the national policy of environmental protection, saving and intensive resource utilization, the comprehensive economic benefit of the method is more and more accepted by investors, and designers and developers are objectively promoted to select steel structures.
In winter construction, higher requirements are put on welding between the steel truss girder and the multi-type support due to low field environment temperature. In the welding construction process of the steel truss girder and the multi-type support, the high-altitude welding operation is more, the splicing welding seams of the truss are concentrated, the welding seams are more and thick, and in addition, the temperature is low and the temperature difference is large in winter, so that the uneven deformation of the welding seams is very easy to cause. Therefore, in order to solve the above problems, it is urgently needed to develop new welding techniques and coatings under the special condition of low temperature in winter.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides a winter welding and coating construction method for a steel truss girder and a multi-type support.
The invention is realized by the following technical scheme:
a winter welding and coating construction method for a steel truss beam and a multi-type support comprises the following steps:
1) welding of steel truss girder and support
Firstly, welding the steel truss girder and the support short column
The steel truss girder is transported to a construction site, the steel truss girder is welded with the support short column, and hoisting operation is carried out after the welding is finished;
Firstly, welding a first welding seam and a second welding seam which are perpendicular to the main structure at the position of a fixed hinged support, welding in the welding direction from the end of the main structure to the outside, simultaneously welding multiple layers and multiple channels at two sides by two persons, wherein the welding direction of each welding seam is the same, and the welding seams at two sides start and end simultaneously;
after the two welding seams are finished, welding the remaining third welding seam and the remaining fourth welding seam, if the welding seam is an outer beam, welding the welding seams from outside to inside, performing multilayer multi-pass welding, and simultaneously starting and finishing the welding seams at two sides; if the inner side beam (both sides are provided with steel beams), the direction does not need to be regulated, the two sides are welded in the same direction, and the welding seams at the two sides start and end simultaneously;
thirdly, welding the short column of the support and the one-way sliding hinged support
After the fixed hinged support is welded, starting welding the one-way sliding hinged support; firstly, welding a fifth welding seam and a sixth welding seam which are perpendicular to the main structure at the position of the one-way sliding hinged support, welding in the welding direction from the end of the main structure to the outside, simultaneously welding the two sides at multiple layers and multiple paths by two persons, wherein the welding direction of each welding seam is the same, and the welding seams at the two sides start and end simultaneously;
after the two welding seams are finished, welding the remaining seventh welding seam and the remaining eighth welding seam, if the welding seam is an outer side beam, welding the welding seams from outside to inside, performing multi-layer and multi-pass welding, and simultaneously starting and finishing the welding seams at two sides; if the inner side beam (both sides are provided with steel beams), the direction does not need to be regulated, the two sides are welded in the same direction, and the welding seams at the two sides start and end simultaneously;
2) coating construction at welding seam
Preparation of epoxy diluent
Epoxy diluents are as described in petroleum xylene: cyclohexanone: butanol = 7: 1: 2 (mass ratio), adding an epoxy diluent into the oily paint to prepare a welding seam paint;
cleaning up the welding seam part before painting;
thirdly, polishing and sand blasting are carried out, and the base material is exposed out of the original steel surface and has no oil stain, rust and oxidation layer;
fully stirring the welding seam coating, keeping the color uniform, and ensuring no flowing and falling and no brush lines during coating due to the working viscosity and consistency of the welding seam coating;
when the first layer of welding seam coating is coated, the coating direction is coated from top to bottom along the welding seam, the width of the coating is connected with the original coating surface by 100mm, and the coating is orderly connected and rubbed;
sixthly, after the first welding seam coating is dried, coating the second welding seam coating, wherein the coating direction of the second welding seam coating is vertical to the coating direction of the first welding seam coating, and sequentially coating the second welding seam coating, so that the thickness of a paint film is uniform and consistent.
Further, in the step 2), when the ambient temperature is higher than 0 ℃, the mass percentage of the epoxy diluent in the welding seam coating is 20%; when the ambient temperature is lower than 0 ℃ and higher than-5 ℃, the mass percentage of the epoxy diluent in the welding seam coating is 25%; when the ambient temperature is lower than-5 ℃, the mass percentage of the epoxy diluent in the welding seam coating is 30%.
And further, after the step 2) is finished, fireproof coating is performed, the surface of the steel structure is cleaned before coating, after coating, the steel structure needs to be covered when meeting strong wind or rain and snow weather within 4 hours, so that the adhesion of the coating is prevented from being affected by sticking dust and water vapor, and the coated steel structure is consistent in coating color and free of wrinkled skin and pimples.
Compared with the prior art, the invention has the following beneficial effects:
the method of the invention makes the construction process flow, ensures that the temperature difference is overlarge due to low environmental temperature when the support is welded, the deformation quantity is different, and the structural stability of the steel structure is damaged, and the symmetrical welding operation is simple, the applicability is strong, and the welding effect is good. The welding seam coating is reasonably prepared, the mixing proportion of the epoxy diluent in the welding seam coating is adjusted according to the environment temperature, the construction performance of the welding seam coating can be greatly adjusted, the same paintability of the welding seam coatings used in different environments is ensured, and the construction quality is ensured. The method can ensure the welding quality of the steel structure, improve the coating brushing performance, greatly accelerate the construction progress, and is safe, reliable, economical and reasonable.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate exemplary embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention.
Fig. 1 is a schematic connection diagram of a steel truss girder and a multi-type support.
Fig. 2 is a top view of fig. 1.
In the figure: the method comprises the following steps of 1-steel truss girder, 2-support short column, 3-fixed hinged support, 4-one-way sliding hinged support, 5-main structure, 6-first welding line, 7-second welding line, 8-third welding line, 9-fourth welding line, 10-fifth welding line, 11-sixth welding line, 12-seventh welding line and 13-eighth welding line.
Detailed Description
In order that those skilled in the art will better understand the present invention, a more complete and complete description of the present invention is provided below in conjunction with the accompanying drawings and embodiments. In addition, the features of the embodiments and examples in the present application may be combined with each other without conflict.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
A winter welding and coating construction method for a steel truss beam and a multi-type support comprises the following steps:
1) welding of steel truss girder 1 and support
Firstly, welding the steel truss girder 1 and the support short column 2
The steel truss girder 1 is transported to a construction site, the steel truss girder 1 and the support short column 2 are welded firstly, and then hoisting operation is carried out;
As shown in fig. 1 and 2, a first welding line 6 and a second welding line 7 which are vertical to a main body structure 5 are welded at a fixed hinged support 3, the welding direction is outward from the end of the main body structure 5, two persons weld multiple layers and multiple welding lines at two sides at the same time, the welding direction of each welding line is the same, and the welding lines at two sides start and end at the same time;
after the two welding seams are finished, the remaining third welding seam 8 and the remaining fourth welding seam 9 are welded, if the welding seams are outside beams, the welding seams are welded from outside to inside, and the welding seams at two sides start and end simultaneously in multi-layer and multi-pass welding; if the inner side beam (both sides are provided with steel beams), the two sides are welded in the same direction without specifying the direction, and the welding seams at the two sides start and end simultaneously;
thirdly, welding the support short column 2 and the one-way sliding hinged support 4
As shown in fig. 1 and 2, after the fixed hinge support 3 is welded, the welding of the one-way sliding hinge support 4 is started; firstly, welding a fifth welding seam 10 and a sixth welding seam 11 which are vertical to the main body structure 5 at the position of the one-way sliding hinged support 4, welding in the welding direction from the end of the main body structure 5 to the outside, simultaneously welding multiple layers and multiple channels at two sides by two persons, wherein the welding direction of each welding seam is the same, and the welding seams at two sides start and end simultaneously;
after the two welding seams are finished, welding the remaining seventh welding seam 12 and the remaining eighth welding seam 13, if the welding seams are outside beams, welding the welding seams from outside to inside, performing multi-layer and multi-pass welding, and simultaneously starting and finishing the welding seams at two sides; if the inner side beam (both sides are provided with steel beams), the direction does not need to be regulated, the two sides are welded in the same direction, and the welding seams at the two sides start and end simultaneously;
2) coating construction at welding seam
Preparation of epoxy diluent
Epoxy diluents are as described in petroleum xylene: cyclohexanone: butanol = 7: 1: 2 (mass ratio), adding an epoxy diluent into the oily paint to prepare a welding seam paint;
when the ambient temperature is higher than 0 ℃, the mass percentage of the epoxy diluent in the welding seam coating is 20%; when the environmental temperature is lower than 0 ℃ and higher than-5 ℃, the mass percentage of the epoxy diluent in the welding seam coating is 25%; when the ambient temperature is lower than-5 ℃, the mass percentage of the epoxy diluent in the welding seam coating is 30%;
cleaning the welding seam part before brushing;
thirdly, polishing and sand blasting are carried out, and the base material is exposed out of the original steel surface and has no oil stain, rust and oxidation layer;
fully stirring the welding seam coating, keeping the color uniform, and ensuring no flowing and falling and no brush lines during coating due to the working viscosity and consistency of the welding seam coating;
when the first layer of welding seam coating is coated, the coating direction is coated from top to bottom along the welding seam, the width of the coating is connected with the original coating surface by 100mm, and the coating is orderly connected and rubbed;
sixthly, after the first welding seam coating is dried, coating the second welding seam coating, wherein the coating direction of the second welding seam coating is vertical to the coating direction of the first welding seam coating, and sequentially coating the second welding seam coating, so that the thickness of a paint film is uniform and consistent.
3) Fire-retardant coating
The surface of the steel structure is cleaned before coating, and after coating, the steel structure needs to be covered when meeting strong wind or rain and snow within 4 hours, so that the adhesion of a coating is prevented from being affected by dust and moisture, the coated color is consistent, and no wrinkles or pimples are generated.
The scope of the invention is not limited to the above embodiments, and various modifications and changes may be made by those skilled in the art, and any modifications, improvements and equivalents within the spirit and principle of the invention should be included in the scope of the invention.
Claims (3)
1. A winter welding and coating construction method for a steel truss beam and a multi-type support is characterized by comprising the following steps of:
1) welding of steel truss girder and support
Firstly, welding the steel truss girder and the support short column
The steel truss girder is transported to a construction site, the steel truss girder is welded with the support short column, and hoisting operation is carried out after the welding is finished;
Firstly, welding a first welding seam and a second welding seam which are perpendicular to the main structure at the position of a fixed hinged support, welding in the welding direction from the end of the main structure to the outside, simultaneously welding multiple layers and multiple channels at two sides by two persons, wherein the welding direction of each welding seam is the same, and the welding seams at two sides start and end simultaneously;
after the two welding seams are finished, welding the remaining third welding seam and the remaining fourth welding seam, if the welding seam is an outer beam, welding the welding seams from outside to inside, performing multilayer multi-pass welding, and simultaneously starting and finishing the welding seams at two sides; if the beam is an inner beam, the direction does not need to be specified, two sides are welded in the same direction, and welding seams at two sides start and end simultaneously;
thirdly, welding the short column of the support and the one-way sliding hinged support
After the fixed hinged support is welded, starting welding the one-way sliding hinged support; firstly, welding a fifth welding seam and a sixth welding seam which are perpendicular to the main structure at the position of the one-way sliding hinged support, welding in the welding direction from the end of the main structure to the outside, simultaneously welding the two sides at multiple layers and multiple paths by two persons, wherein the welding direction of each welding seam is the same, and the welding seams at the two sides start and end simultaneously;
after the two welding seams are finished, welding the remaining seventh welding seam and the remaining eighth welding seam, if the welding seam is an outer side beam, welding the welding seams from outside to inside, performing multi-layer and multi-pass welding, and simultaneously starting and finishing the welding seams at two sides; if the beam is an inner beam, the direction does not need to be specified, two sides are welded in the same direction, and welding seams at two sides start and end simultaneously;
2) coating construction at welding seam
Preparation of epoxy diluent
Epoxy diluents are as described in petroleum xylene: cyclohexanone: butanol = 7: 1: 2 (mass ratio), adding an epoxy diluent into the oily paint to prepare a welding seam paint;
cleaning up the welding seam part before painting;
thirdly, polishing and sand blasting are carried out, and the base material is exposed out of the original steel surface and has no oil stain, rust and oxidation layer;
fully stirring the welding seam coating, keeping the color uniform, and ensuring no flowing and falling and no brush lines during coating due to the working viscosity and consistency of the welding seam coating;
when the first layer of welding seam coating is coated, the coating direction is coated from top to bottom along the welding seam, the width of the coating is connected with the original coating surface by 100mm, and the coating is orderly connected and rubbed;
sixthly, after the first welding seam coating is dried, coating the second welding seam coating, wherein the coating direction of the second welding seam coating is vertical to the coating direction of the first welding seam coating, and sequentially coating the second welding seam coating, so that the thickness of a paint film is uniform and consistent.
2. The winter welding and paint construction method of the steel truss girder and the multi-type support according to claim 1, wherein: in the step 2), when the ambient temperature is higher than 0 ℃, the mass percentage of the epoxy diluent in the welding seam coating is 20%; when the ambient temperature is lower than 0 ℃ and higher than-5 ℃, the mass percentage of the epoxy diluent in the welding seam coating is 25%; when the ambient temperature is lower than-5 ℃, the mass percentage of the epoxy diluent in the welding seam coating is 30%.
3. The winter welding and paint construction method of the steel truss girder and the multi-type support according to claim 1 or 2, wherein: and 2) after finishing the step 2), performing fireproof coating, cleaning the surface of the steel structure before coating, and after coating, covering the steel structure when meeting the weather of strong wind or rain and snow within 4 hours to prevent the steel structure from being stained with dust and moisture and influence the adhesive force of the coating, wherein the coated steel structure has consistent coating color and is free from wrinkled skin and pimples.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114841040A (en) * | 2022-05-20 | 2022-08-02 | 上交(徐州)新材料研究院有限公司 | Method suitable for making large truss welding process |
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|---|---|---|---|---|
| CN105904063A (en) * | 2016-05-25 | 2016-08-31 | 中建钢构武汉有限公司 | Forged steel piece welding method |
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2021
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| CN105904063A (en) * | 2016-05-25 | 2016-08-31 | 中建钢构武汉有限公司 | Forged steel piece welding method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114841040A (en) * | 2022-05-20 | 2022-08-02 | 上交(徐州)新材料研究院有限公司 | Method suitable for making large truss welding process |
| CN114841040B (en) * | 2022-05-20 | 2024-05-07 | 上交(徐州)新材料研究院有限公司 | Formulation method suitable for large truss welding process |
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