Steel shell tower section structure and section ring opening welding deformation control method

Abstract

The invention relates to the technical field of engineering application, in particular to a steel shell tower section structure and a section ring opening welding deformation control method. The invention provides a steel shell tower segment structure which comprises plate units, the plate units are used for forming a shell structure of the segment structure, splicing weld joints are arranged between the multiple plate units, the multiple plate units are connected through welding treatment of the splicing weld joints, and the plate units are connected with the shell structure of the segment structure. The welding treatment of the assembly welding seam is carried out based on a preset welding shrinkage amount. By the adoption of the method, traditional rigid constraint is not adopted to limit ring opening welding deformation, the welding shrinkage amount is preset step by step according to the manufacturing stage to enable the welding shrinkage amount to freely shrink so as to control the ring opening welding deformation, the ring opening welding deformation control precision during steel shell tower in-plant manufacturing is greatly improved, and the bridge site steel shell tower section matching precision is improved.

Description

Technical Field

[0001] The present application relates to the field of engineering application technology, and in particular to a steel shell tower segment structure and a method for controlling segment ring welding deformation. Background Art

[0002] The steel-concrete hybrid tower column is a new type of bridge tower column structure that has emerged in recent years. It is composed of an outer "shell-shaped" steel wall plate and an inner layer of reinforced concrete. The outer steel wall plates are welded, and there is no cross partition in the steel shell. This structure combines the characteristics of steel structure and reinforced concrete structure. It is a high-performance structure with simple structure, high material utilization, efficient construction, and excellent seismic performance. The outer steel shell not only serves as a concrete formwork, but also has a load-bearing function.

[0003] The cross-section of steel shell towers is relatively large. Generally, plate units are first made in the factory, and then the plate units are assembled and welded into steel shell segments. Finally, the rings of the segments are welded together at the bridge site and concrete is poured in sections. The specification requires that the misalignment of the wall panels should not be greater than 1mm when the rings are welded. Therefore, the matching accuracy of the large-section rings of the steel shell tower segments is a technical difficulty.

[0004] In the related technology, the ring mouth matching accuracy mainly relies on the rigid constraint when the segments are assembled to limit the welding deformation. However, since there is no partition in the steel shell and no inner tube support, the rigid constraint method of controlling the ring mouth welding deformation is less effective. In addition, due to the height limit of the workshop, the steel shell tower segments cannot be manufactured by continuous matching, which often causes the ring mouth of the steel shell tower segments to be unable to match when connected at the bridge site. Therefore, the current application of the steel shell tower segment ring mouth preparation still needs to be optimized. Summary of the invention

[0005] Based on this, it is necessary to provide a method for controlling the ring welding deformation by allowing it to shrink freely without using traditional rigid constraints to limit the ring welding deformation in response to the above-mentioned technical problems. This method greatly improves the control accuracy of the ring welding deformation during the manufacturing of the steel shell tower in the factory, improves the matching accuracy of the steel shell tower segments at the bridge site, and provides a steel shell tower segment structure and a method for controlling the ring welding deformation of the segment.

[0006] In a first aspect, the present application provides a steel shell tower segment structure, the segment structure comprising:

[0007] A plate unit is used to form a shell structure of the segment structure. An assembling weld is provided between several of the plate units. Several of the plate units are connected by welding the assembling weld. The welding of the assembling weld is performed based on a preset welding shrinkage amount.

[0008] In one embodiment, the plate thicknesses of several plate units are the same.

[0009] In one embodiment, the groove patterns of several plate units are the same.

[0010] In one embodiment, the assembly welds include fillet welds and butt welds.

[0011] In one embodiment, the plate unit includes a wall panel and a stiffening rib, wherein the stiffening rib is fixed to the wall panel and is arranged on the inner side of the segment structure formed by the plate unit, and the stiffening rib is used to correct the welding deformation of the plate unit in a preset direction.

[0012] In a second aspect, the present application also provides a method for controlling welding deformation of a steel shell tower segment ring, the method comprising:

[0013] Providing a plurality of plate units, wherein the connecting sides of the plate units are provided with a splicing groove, and the plate thickness and groove type of the plate units are the same;

[0014] Based on the shape of the steel shell tower, segment assembly is performed to determine the connection method between the plate units;

[0015] Based on a preset first welding shrinkage amount, welding is performed on the fillet welds between the plate units to form a fillet member;

[0016] Based on a preset second welding shrinkage, welding is performed on the butt welds between the plate units, and the fillet members are assembled to form a segment structure;

[0017] Free shrinkage is performed based on the first welding shrinkage and the second welding shrinkage to control welding deformation of the segment structure.

[0018] In one embodiment, the providing of a plurality of plate units, the connecting sides of the plate units being provided with a splicing groove, the plate thickness and groove type of the plate units being the same comprises:

[0019] Welding to form the plate unit;

[0020] The welding deformation of the plate unit is leveled.

[0021] In one embodiment, the segment assembly based on the shape of the steel shell tower and determining the connection mode between the plate units include:

[0022] When the segment structure of the steel shell tower is assembled, a butt weld is arranged in each direction of the segment ring mouth cross section.

[0023] In one embodiment, the method includes: determining the first welding shrinkage and the second welding shrinkage of the plate unit by performing a welding test on a test plate unit.

[0024] In one embodiment, the providing of a plurality of plate units, the connecting sides of the plate units being provided with a splicing groove, the plate thickness and groove type of the plate units being the same comprises:

[0025] Before the plate unit is welded and formed, an anti-deformation structure in a first direction is arranged on the plate unit;

[0026] After the plate unit is welded and formed, the welding deformation is leveled by mechanical or flame correction in a second direction, wherein the first direction is perpendicular to the second direction.

[0027] The above-mentioned steel shell tower segment structure and the control method of segment ring welding deformation are derived through the technical features in the claims, and can achieve the beneficial effects of the technical problems in the corresponding background technology:

[0028] The present application provides a steel shell tower segment structure, the segment structure comprising: a plate unit, the plate unit is used to form a shell structure of the segment structure, a plurality of the plate units are provided with assembly welds, the plurality of the plate units are connected by welding the assembly welds, and the welding of the assembly welds is performed based on a preset welding shrinkage. In implementation, when processing the assembly welds of the plate unit, a certain welding shrinkage is pre-set, which helps to achieve the control of the welding deformation of the steel shell tower segment structure without setting up additional external devices, so that the traditional rigid constraint is not used to limit the ring welding deformation, but the welding shrinkage is preset in steps according to the manufacturing stage to allow it to shrink freely and control the ring welding deformation. This method greatly improves the control accuracy of the ring welding deformation during the in-plant manufacturing of the steel shell tower and improves the matching accuracy of the bridge site steel shell tower segment. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0030] Figure 1 A schematic diagram of a steel shell structure and welds of a steel shell tower in the related art;

[0031] Figure 2 A structural schematic diagram of a steel shell tower segment structure in an embodiment; a steel shell tower segment structure and a method for controlling segment ring welding deformation

[0032] Figure 3 It is a flow chart of a method for controlling welding deformation of a ring opening of a steel shell tower segment in one embodiment;

[0033] Figure 4 A schematic diagram of assembling plate unit segments in a method for controlling welding deformation of a ring opening of a steel shell tower segment in one embodiment;

[0034] Figure 5 A schematic diagram of a corner joint assembly in a method for controlling welding deformation of a ring opening of a steel shell tower segment in an embodiment;

[0035] Figure 6 It is a schematic diagram of the corner joint assembly in a method for controlling the welding deformation of the ring mouth of a steel shell tower segment in another embodiment;

[0036] Figure 7 is a schematic diagram of a first welding shrinkage amount in one embodiment;

[0037] Figure 8 FIG. 4 is a schematic diagram of the second welding shrinkage in one embodiment. DETAILED DESCRIPTION

[0038] In order to facilitate understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Embodiments of the present application are provided in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0040] It is understood that the terms "first", "second", etc. used in this application may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish a first element from another element. For example, without departing from the scope of this application, a first resistor may be referred to as a second resistor, and similarly, a second resistor may be referred to as a first resistor. Both the first resistor and the second resistor are resistors, but they are not the same resistor.

[0041] It can be understood that the “connection” in the following embodiments should be understood as “electrical connection”, “communication connection”, etc. if the connected circuits, modules, units, etc. have electrical signals or data transmission between each other.

[0042] It can be understood that “at least one” means one or more, “plurality” means two or more, and “at least a portion of an element” means a part or all of an element.

[0043] When used herein, the singular forms "a", "an", and "said / the" may also include plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include / comprise" or "have" and the like specify the presence of stated features, wholes, steps, operations, components, parts, or combinations thereof, but do not exclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof. At the same time, the term "and / or" used in this specification includes any and all combinations of the relevant listed items.

[0044] This application is made by the inventor based on the recognition and research of the following issues, specifically:

[0045] The steel-concrete hybrid tower column is a new type of bridge tower column structure that has emerged in recent years. It is composed of an outer "shell-shaped" steel wall plate and an inner layer of reinforced concrete. The outer steel wall plates are welded, and there is no cross partition in the steel shell. This structure combines the characteristics of steel structure and reinforced concrete structure. It is a high-performance structure with simple structure, high material utilization, efficient construction, and excellent seismic performance. The outer steel shell not only serves as a concrete formwork, but also has a load-bearing function.

[0046] The cross-section of steel shell towers is relatively large. Generally, plate units are first made in the factory, and then the plate units are assembled and welded into steel shell segments. Finally, the rings of the segments are welded together at the bridge site and concrete is poured in sections. The specification requires that the misalignment of the wall panels should not be greater than 1mm when the rings are welded. Therefore, the matching accuracy of the large-section rings of the steel shell tower segments is a technical difficulty.

[0047] In the related art, Figure 1 As shown in the figure, the ring mouth matching accuracy mainly relies on the rigid constraint when the segments are assembled to limit the welding deformation. However, since there is no partition in the steel shell and no inner tube support, the rigid constraint method to control the ring mouth welding deformation is less effective. In addition, due to the height limit of the workshop, the steel shell tower segments cannot be manufactured by continuous matching, which often causes the ring mouth of the steel shell tower segments to be unable to match when connected at the bridge site. Therefore, the current application of the steel shell tower segment ring mouth preparation still needs to be optimized.

[0048] Based on the above problems, the embodiments of the present application provide a steel shell tower segment structure and a method for controlling segment ring welding deformation.

[0049] In one embodiment, it can be Figure 2 As shown, an embodiment of the present application provides a steel shell tower segment structure, and the segment structure includes:

[0050] A plate unit is used to form a shell structure of the segment structure. An assembling weld is provided between several of the plate units. Several of the plate units are connected by welding the assembling weld. The welding of the assembling weld is performed based on a preset welding shrinkage amount.

[0051] By implementing the above-mentioned steel shell tower segment structure, the following beneficial effects can be achieved:

[0052] The present application provides a steel shell tower segment structure, the segment structure comprising: a plate unit, the plate unit is used to form a shell structure of the segment structure, a plurality of the plate units are provided with assembly welds, the plurality of the plate units are connected by welding the assembly welds, and the welding of the assembly welds is performed based on a preset welding shrinkage. In implementation, when processing the assembly welds of the plate unit, a certain welding shrinkage is pre-set, which helps to achieve the control of the welding deformation of the steel shell tower segment structure without setting up additional external devices, so that the traditional rigid constraint is not used to limit the ring welding deformation, but the welding shrinkage is preset in steps according to the manufacturing stage to allow it to shrink freely and control the ring welding deformation. This method greatly improves the control accuracy of the ring welding deformation during the in-plant manufacturing of the steel shell tower and improves the matching accuracy of the bridge site steel shell tower segment.

[0053] In one embodiment, the plate thicknesses of several plate units are the same.

[0054] In one embodiment, the groove patterns of several plate units are the same.

[0055] In this embodiment, the plate thickness and groove type of the plate unit are the same, which is helpful for performing a unified calculation of welding shrinkage, thereby improving the control efficiency of welding deformation.

[0056] In one embodiment, the assembly welds include fillet welds and butt welds.

[0057] In one embodiment, the plate unit includes a wall panel and a stiffening rib, wherein the stiffening rib is fixed to the wall panel and is arranged on the inner side of the segment structure formed by the plate unit, and the stiffening rib is used to correct the welding deformation of the plate unit in a preset direction.

[0058] In this embodiment, the specific structure of the plate unit includes a wall panel and stiffening ribs. The stiffening ribs are used to help correct the welding deformation of the wall panel in a specific direction, thereby improving the overall welding deformation.

[0059] Based on the same inventive concept, the embodiment of the present application also provides a method for controlling the welding deformation of the ring mouth of a steel shell tower segment, which can be as follows: Figure 3 As shown, including:

[0060] Step 301: providing a plurality of plate units, wherein the connecting sides of the plate units are provided with a splicing groove, and the plate thickness and groove type of the plate units are the same.

[0061] Step 303: Assemble segments based on the shape of the steel shell tower and determine the connection method between the plate units.

[0062] Step 305: Based on a preset first welding shrinkage amount, welding is performed on the fillet welds between the plate units to form fillet components.

[0063] Step 307: Based on a preset second welding shrinkage amount, welding is performed on the butt welds between the plate units, and the fillet components are assembled to form a segment structure.

[0064] Step 309: Freely shrink based on the first welding shrinkage and the second welding shrinkage to control welding deformation of the segment structure.

[0065] By implementing the above-mentioned method for controlling the welding deformation of the ring opening of a steel shell tower segment, the following beneficial effects can be achieved:

[0066] Through the corresponding process flow, it is helpful to control the welding deformation of the steel shell tower segment structure without setting up additional external devices, so that the traditional rigid constraint is not used to limit the ring welding deformation, but the welding shrinkage amount is preset step by step according to the manufacturing stage to allow it to shrink freely and control the ring welding deformation. This method greatly improves the control accuracy of the ring welding deformation during the in-plant manufacturing of the steel shell tower and improves the matching accuracy of the steel shell tower segments at the bridge site.

[0067] In one embodiment, step 301 includes:

[0068] Step 401: welding to form the plate unit;

[0069] Step 403: Leveling the welding deformation of the plate unit.

[0070] In this embodiment, after the plate unit is formed by welding, the welding deformation of the plate unit is adjusted, which helps to improve the flatness and stability of the plate unit, thereby improving the overall stability of the segment ring.

[0071] In one embodiment, step 303 includes:

[0072] Step 501: When assembling the segment structure of the steel shell tower, a butt weld is provided in each direction of the segment ring cross section.

[0073] In one embodiment, the method comprises:

[0074] Step 601: Determine the first welding shrinkage and the second welding shrinkage of the plate unit by performing a welding test on the test plate unit.

[0075] In one embodiment, step 301 includes:

[0076] Step 701: before the plate unit is welded and formed, an anti-deformation structure in a first direction is provided on the plate unit;

[0077] Step 703: After the plate unit is welded, the welding deformation is leveled in a second direction by mechanical or flame correction, wherein the first direction is perpendicular to the second direction.

[0078] In this embodiment, the plate unit is subjected to welding deformation treatment in two directions. An anti-deformation structure is directly configured in the first direction, and mechanical or flame correction is performed in the second direction, which helps to improve the stability of the plate unit.

[0079] In a most specific embodiment, it can be Figure 4-8 As shown, the present application provides a method for controlling the welding deformation of the ring opening of a steel shell tower segment, comprising the following steps:

[0080] 1) Weld the plate units and level the welding deformation of each plate unit;

[0081] Each plate unit is a wall plate + stiffening rib structure. The transverse reverse deformation is preset before welding, and no transverse bending deformation will occur after welding; it is only necessary to level the longitudinal bending welding deformation through mechanical or flame correction.

[0082] 2) Using the same plate thickness, groove type and welding method for fillet welds, determine the welding shrinkage in both directions of the fillet welds through tests , ;

[0083] In order to ensure accurate welding shrinkage test results, the width of the test plate should be ≥500mm; , .

[0084] 3) Welding shrinkage determined by test , preset welding shrinkage, welding shrinkage and welding shrinkage determined by test Equally, weld the fillet welds between the A11-A12, A21-A22, B11-B12, B21-B22, C11-A12, C21-C22, D11-D12, D21-D22 plate units and correct the welding angle deformation;

[0085] 4) Welding shrinkage determined by test , preset welding shrinkage, welding shrinkage and welding shrinkage determined by test Equally, weld the fillet welds between A1-A2, B1-B2, C1-C2, D1-D2 and correct the welding angle deformation;

[0086] 5) Use the same plate thickness, groove type and welding method as the butt weld, and determine the welding shrinkage of the butt weld through experiments .

[0087] In order to ensure accurate welding shrinkage test results, the width of the test plate should be ≥500mm; .

[0088] 6) When assembling segments, a butt weld is set in each direction of the ring cross section, and the welding shrinkage is determined according to the test. , preset welding shrinkage (welding shrinkage and welding shrinkage determined by test) equal), welding the butt welds between the four corner members A, B, C, and D.

[0089] It should be understood that, although the various steps in the flowcharts involved in the above-mentioned embodiments are displayed in sequence according to the indication of the arrows, these steps are not necessarily executed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps does not have a strict order restriction, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above-mentioned embodiments can include multiple steps or multiple stages, and these steps or stages are not necessarily executed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a part of the steps or stages in other steps.

[0090] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0091] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A steel shell tower segment structure, characterized in that: The segment structure comprises: A plate unit is used to form a shell structure of the segment structure. An assembling weld is provided between several of the plate units. Several of the plate units are connected by welding the assembling weld. The welding of the assembling weld is performed based on a preset welding shrinkage amount.

2. A steel shell tower segment structure according to claim 1, characterized in that: The plate thicknesses of the plurality of plate units are the same.

3. The steel shell tower segment structure according to claim 1, characterized in that: The groove types of several plate units are the same.

4. The steel shell tower segment structure according to claim 1, characterized in that: The assembly welds include fillet welds and butt welds.

5. The steel shell tower segment structure according to claim 1, characterized in that: The plate unit includes a wall plate and a stiffening rib, wherein the stiffening rib is fixed to the wall plate and arranged on the inner side of the segment structure formed by the plate unit, and the stiffening rib is used to correct the welding deformation of the plate unit in a preset direction.

6. A method for controlling the welding deformation of the ring mouth of a steel shell tower segment, characterized in that: The method comprises: Providing a plurality of plate units, wherein the connecting sides of the plate units are provided with a splicing groove, and the plate thickness and groove type of the plate units are the same; Based on the shape of the steel shell tower, segment assembly is performed to determine the connection method between the plate units; Based on a preset first welding shrinkage amount, welding is performed on the fillet welds between the plate units to form a fillet member; Based on a preset second welding shrinkage, welding is performed on the butt welds between the plate units, and the fillet members are assembled to form a segment structure; Free shrinkage is performed based on the first welding shrinkage and the second welding shrinkage to control welding deformation of the segment structure.

7. A method for controlling welding deformation of a steel shell tower segment ring according to claim 6, characterized in that: The method of providing a plurality of plate units, wherein the connecting sides of the plate units are provided with a splicing groove, and the plate thickness and groove type of the plate units are the same includes: Welding to form the plate unit; The welding deformation of the plate unit is leveled.

8. A method for controlling welding deformation of a steel shell tower segment ring according to claim 6, characterized in that: The segment assembly based on the shape of the steel shell tower and determining the connection mode between the plate units include: When the segment structure of the steel shell tower is assembled, a butt weld is arranged in each direction of the segment ring mouth cross section.

9. A method for controlling welding deformation of a steel shell tower segment ring according to claim 6, characterized in that: The method comprises: determining the first welding shrinkage amount and the second welding shrinkage amount of the plate unit by performing a welding test on a test plate unit.

10. A method for controlling welding deformation of a steel shell tower segment ring according to claim 7, characterized in that: The method of providing a plurality of plate units, wherein the connecting sides of the plate units are provided with a splicing groove, and the plate thickness and groove type of the plate units are the same includes: Before the plate unit is welded and formed, an anti-deformation structure in a first direction is arranged on the plate unit; After the plate unit is welded and formed, the welding deformation is leveled by mechanical or flame correction in a second direction, wherein the first direction is perpendicular to the second direction.

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