Method for manufacturing spatial curved steel box girder

Abstract

The present invention relates to the technical field of bridge construction, and provides a method for manufacturing a spatial curved steel box girder. The method comprises the following steps: acquiring three-dimensional coordinates of each curved plate unit of a spatial curved steel box girder on the basis of a data model of the spatial curved steel box girder; after establishing a unified coordinate system on a mounting plane, building an assembly jig by incorporating the three-dimensional coordinates of each curved plate unit; by adjusting the heights of elevation adjusting base plates, sequentially machining each curved plate unit on the built assembly jig; drawing positioning lines on all the curved plate units; on the basis of the positioning lines, assembling the components of a first segment of the spatial curved steel box girder other than an anchor tube onto the assembly jig; on the basis of the positioning lines and the three-dimensional coordinates of the corresponding curved plate units, assembling the anchor tube on the first segment to complete the assembly of the first segment; and repeating the steps of assembling the first segment until the assembly of the remaining segments of the spatial curved steel box girder is completed. The present invention effectively improves the prefabrication efficiency of spatial curved steel box girders.

Description

Manufacturing method of spatial curved surface steel box girder TECHNICAL FIELD

[0001] The present application relates to the technical field of bridge construction, in particular to a manufacturing method of spatial curved surface steel box girder. BACKGROUND

[0002] At present, the steel box girder is usually constructed by the method of factory prefabrication and on-site assembly. Specifically, an arch rib segment is accurately manufactured in a factory according to a design drawing, the prefabricated arch rib segment is transported to a construction site by a special transportation device, and then a large crane is used for accurate hoisting.

[0003] In the related art, the spatial curved surface steel box girder is a complex bridge structure form, and the main arch structure presents a spatial curved surface shape instead of a traditional plane or a simple curve shape. The spatial curved surface can be a complex geometric surface in a free form, such as a hyperbolic paraboloid, a twisted surface, a saddle surface, etc., and the design usually relies on advanced three-dimensional modeling software (such as CATIA).

[0004] However, the inventors have realized that, in the actual manufacturing process, since the spatial curved surface steel box girder presents a spatial curved surface shape, the manufacturing difficulty of the spatial curved surface steel box girder is greater than that of an ordinary plane steel box girder, especially the manufacturing difficulty of the plate unit and the positioning difficulty of the anchor pipe of the spatial curved surface steel box girder are relatively large, thereby resulting in low prefabrication efficiency of the spatial curved surface steel box girder.

[0005] SUMMARY

[0006] The problem solved by the present application is how to improve the prefabrication efficiency of the spatial curved surface steel box girder.

[0007] To solve the above problems, the present application provides a manufacturing method of spatial curved surface steel box girder, comprising the following steps:

[0008] S100, obtaining three-dimensional coordinates of each curved surface plate unit of the spatial curved surface steel box girder according to a data model of the spatial curved surface steel box girder;

[0009] S200, after establishing a unified coordinate system on an erection plane, assembling a fitting jig in combination with the three-dimensional coordinates of each curved surface plate unit; wherein the fitting jig comprises a plurality of elevation adjusting backing plates;

[0010] S300, sequentially processing each curved surface plate unit on the assembled fitting jig by adjusting the height of the elevation adjusting backing plate;

[0011] S400, drawing a positioning line on all the curved surface plate units;

[0012] S500, assembling components of the first segment of the spatial curved steel box girder except anchor pipes on the assembling jig according to the positioning line;

[0013] S500, assembling anchor pipes on the first segment according to the positioning line and three-dimensional coordinates corresponding to the curved panel unit to complete assembly of the first segment;

[0014] Repeat steps S500 to S600 until assembly of the remaining segments of the spatial curved steel box girder is completed.

[0015] Optionally, after the unified coordinate system is established on the erection plane, the assembling jig is erected in combination with the three-dimensional coordinates of each panel unit, comprising:

[0016] After the unified coordinate system is established, the coordinates of the control points on the horizontal plane of the curved panel unit are obtained and identified;

[0017] The assembling jig is erected according to the identified control point coordinates.

[0018] Optionally, the assembling jig further comprises upright columns and cross beams; and the assembling jig is erected according to the identified control point coordinates, comprising:

[0019] The upright columns are arranged at the positions of the identified control point coordinates;

[0020] The upright columns arranged in the first direction are connected by the cross beams, and the cross beams are located on the top of the upright columns;

[0021] The elevation adjustment pads are arranged on the top of the cross beams, and the elevation adjustment pads are arranged on the cross beams corresponding to the positions of the control point coordinates.

[0022] Optionally, the control point coordinates comprise the bending point coordinates of the curved panel unit, the control point coordinates of the partition line, the coordinates of the change point of curvature, and the control point coordinates of the anchor box installation line.

[0023] Optionally, the curved panel units are sequentially processed on the erected assembling jig by adjusting the height of the elevation adjustment pads, comprising:

[0024] Before processing the curved panel unit each time, all the elevation adjustment pads are adjusted to a set height;

[0025] A flat panel to be processed is laid on the assembling jig, and the to-be-processed panel is deformed by a preset processing method until the curved panel unit is formed.

[0026] Optionally, the preset processing method comprises fire adjustment or heavy pressing.

[0027] Optionally, the method for manufacturing the spatial curved steel box girder further comprises: assembling stiffening ribs on the curved panel units after the curved panel units are manufactured.

[0028] Optionally, the positioning lines comprise partition plate positioning lines, web positioning lines and anchor box positioning lines; assembling components of the first segment of the spatial curved steel box girder on the assembling jig except anchor pipes according to the positioning lines comprises:

[0029] fixing one of the curved panel units on the assembled assembling jig as a bottom plate of the first segment;

[0030] assembling partition plate, web and anchor box unit elements of the first segment on the bottom plate according to the partition plate positioning lines, the web positioning lines and the anchor box positioning lines;

[0031] assembling the curved panel units on both sides of the first segment according to the partition plate positioning lines, the web positioning lines and the anchor box positioning lines first, and then assembling the curved panel unit on the top of the first segment.

[0032] Optionally, the positioning lines further comprise anchor pipe positioning lines; assembling anchor pipes on the first segment according to the positioning lines and three-dimensional coordinates of the corresponding curved panel to complete assembly of the first segment comprises:

[0033] positioning the anchor pipes according to the anchor pipe positioning lines, anchor point coordinates of the anchor pipes and out-rope point coordinates of the anchor pipes;

[0034] installing the anchor pipes at the anchor box unit elements to complete assembly of the first segment.

[0035] Optionally, after the anchor pipes are installed, the method further comprises:

[0036] measuring whether parameters of the first segment meet design requirements in the unified coordinate system, wherein the parameters of the first segment comprise out-rope point coordinates of the anchor pipes, control point coordinates of the first segment and box opening dimensions of the first segment;

[0037] when the parameters of the first segment do not meet the design requirements, reassembling.

[0038] Compared with the prior art, the method has the following beneficial effects:

[0039] In the manufacturing of the spatial curved surface steel box girder, the curved surface plate units of the spatial curved surface steel box girder are manufactured first, specifically, three-dimensional coordinates of each curved surface plate unit of the spatial curved surface steel box girder are acquired according to a data model of the spatial curved surface steel box girder; after a unified coordinate system is established on an erection plane, a splicing jig is erected in combination with the three-dimensional coordinates of each plate unit; the height of the adjusting pad is adjusted by adjusting the height of the splicing jig, and each curved surface plate unit is sequentially processed on the completed splicing jig, so that the manufacturing of multiple curved surface plate units is completed on one splicing jig, which effectively reduces the manufacturing difficulty of the curved surface plate units; then each segment of the spatial curved surface steel box girder is manufactured, specifically, positioning lines are drawn on all the curved surface plate units; components of a first segment of the spatial curved surface steel box girder except anchor pipes are assembled on the splicing jig according to the positioning lines; the anchor pipes are assembled on the first segment according to the positioning lines and the three-dimensional coordinates of the corresponding curved surface plate, so as to complete the assembly of the first segment; the assembly of the first segment is repeated until the assembly of the remaining segments of the spatial curved surface steel box girder is completed, so that reliable positioning of the anchor pipes can be realized in the manufacturing process of each segment, thereby reducing the installation difficulty of the anchor pipes. In summary, the manufacturing difficulty of the plate units and the positioning difficulty of the anchor pipes of the spatial curved surface steel box girder are reduced, and the prefabrication efficiency of the spatial curved surface steel box girder is effectively improved. BRIEF DESCRIPTION OF DRAWINGS

[0040] Fig. 1 is a flowchart of the manufacturing method of the spatial curved surface steel box girder according to an embodiment of the present application;

[0041] Fig. 2 is a sectional view of the splicing jig according to an embodiment of the present application;

[0042] Fig. 3 is a use state diagram of the splicing jig according to an embodiment of the present application.

[0043] Marked explanation: 1, splicing jig; 11, height adjusting pad; 12, vertical column; 13, cross beam; 14, support plate; 15, inclined strut; 2, spatial curved surface steel box girder. DETAILED DESCRIPTION

[0044] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the drawings.

[0045] One or more embodiments of the present application disclose a manufacturing method of a spatial curved surface steel box girder, as shown in Fig. 1, which comprises the following steps:

[0046] S100, acquiring three-dimensional coordinates of each curved surface plate unit of the spatial curved surface steel box girder 2 according to a data model of the spatial curved surface steel box girder 2;

[0047] In this embodiment, the data model is a three-dimensional model, which can be modeled and generated in three-dimensional software such as CATIA, UG, SOLIDWORKS, etc.

[0048] S200, after establishing the unified coordinate system on the erection plane, the assembling jig 1 is erected in combination with the three-dimensional coordinates of each curved panel unit; wherein the assembling jig 1 comprises a plurality of elevation adjusting pads;

[0049] In this embodiment, the erection plane is generally a rigid ground, and the unified coordinate system can be established on the rigid ground by using a total station.

[0050] S300, by adjusting the height of the elevation adjusting pad 11, each curved panel unit is sequentially processed on the assembled jig 1 which has been erected;

[0051] In this embodiment, the height of the elevation adjusting pad 11 is adjusted by a jacking oil cylinder, which can be adjusted individually or simultaneously, and the present application does not limit this, which is determined according to actual needs.

[0052] S400, draw the positioning line on all curved panel units;

[0053] In this embodiment, a brush or ink bucket can be used to draw the positioning line on the curved panel unit.

[0054] S500, according to the positioning line, the components of the first segment of the spatial curved surface steel box girder 2 except the anchor pipe are assembled on the assembling jig 1;

[0055] S600, according to the positioning line and the three-dimensional coordinates of the corresponding curved panel unit, the anchor pipe is assembled on the first segment to complete the assembly of the first segment;

[0056] S700, repeat the steps of S500 to S600 until the assembly of the remaining segments of the spatial curved surface steel box girder 2 is completed.

[0057] The method for manufacturing the spatial curved surface steel box girder 2 in the embodiment is used to manufacture the spatial curved surface steel box girder 2, first, the three-dimensional coordinates of each curved surface panel unit of the spatial curved surface steel box girder 2 are obtained according to the data model of the spatial curved surface steel box girder 2; after the unified coordinate system is established, the assembling jig 1 is erected in combination with the three-dimensional coordinates of each panel unit, and the effect of the assembling jig 1 is shown in FIG. 2; the height of the height adjustment pad 11 is adjusted by adjusting the height of the assembling jig 1, and each curved surface panel unit is sequentially processed on the completed assembling jig 1, therefore, the manufacturing difficulty of the curved surface panel unit is effectively reduced by adjusting the height of the height adjustment pad 11, that is, one assembling jig 1 can complete the manufacturing of multiple curved surface panel units; then, each segment of the spatial curved surface steel box girder 2 is manufactured, specifically, the positioning lines are drawn on all the curved surface panel units; the components of the first segment of the spatial curved surface steel box girder 2 except the anchor pipe are assembled on the assembling jig 1 according to the positioning lines; the anchor pipe is assembled on the first segment according to the positioning lines and the three-dimensional coordinates of the corresponding curved surface panel, so as to complete the assembly of the first segment; the steps of assembling the first segment are repeated until the assembly of the remaining segments of the spatial curved surface steel box girder 2 is completed, and the effect is shown in FIG. 3, therefore, the reliable positioning of the anchor pipe can be realized in the manufacturing process of each segment, and the installation difficulty of the anchor pipe is reduced. In summary, the manufacturing difficulty of the panel unit and the positioning difficulty of the anchor pipe of the spatial curved surface steel box girder 2 are reduced, and the prefabrication efficiency of the spatial curved surface steel box girder 2 is effectively improved.

[0058] Optionally, the step S200 comprises:

[0059] After the unified coordinate system is established, the control point coordinates on the horizontal plane of the curved surface panel unit are obtained and marked.

[0060] In the embodiment, the control point coordinates are the XY coordinates at the control points, and the control point coordinates are marked by means such as marking lines or coloring after being found.

[0061] The assembling jig 1 is erected according to the marked control point coordinates.

[0062] Specifically, as shown in FIG. 2, the assembling jig 1 further comprises a stand column 12 and a cross beam 13; the assembling jig 1 is erected according to the marked control point coordinates, which comprises:

[0063] The stand column 12 is arranged at the position of the marked control point coordinates;

[0064] The multiple stand columns 12 arranged along the first direction are connected by the cross beam 13, and the cross beam 13 is located at the top of the multiple stand columns 12;

[0065] The multiple height adjustment pads 11 are arranged at the top of the cross beam 13, and the cross beam 13 is provided with the height adjustment pad 11 at the position corresponding to the control point coordinates.

[0066] In the embodiment, the control point coordinates include the bending point coordinates of the curved panel unit, the control point coordinates of the partition line, the coordinates of the point of curvature change, and the control point coordinates of the anchor box mounting line.

[0067] In this way, after the erection of the assembled jig frame 1 is completed, the cross beam 13 serves as a connecting beam of the plurality of columns 12, ensuring the strength of the plurality of columns 12, and thereby enhancing the structural strength of the assembled jig frame 1; at the same time, by adjusting the height of all the elevation adjustment pads 11, the curved panel unit manufacturing can be adapted to different curved surfaces.

[0068] Further, as shown in FIG. 2, the assembled jig frame 1 further comprises a support plate 14 and a diagonal brace 15. Before the column 12 is installed, the support plate 14 is laid for the installation of the column 12, and after the column 12 is installed on the support plate 14, the diagonal brace 15 is used for auxiliary support, thereby enhancing the strength and stability of the column 12.

[0069] Optionally, the step S300 comprises:

[0070] Before each time the curved panel unit is processed, all the elevation adjustment pads 11 are adjusted to a set height;

[0071] On the assembled jig frame 1, a flat panel to be processed is laid, and the panel to be processed is deformed by a preset processing method until the curved panel unit is formed.

[0072] In the embodiment, the standard for the completion of the curved panel unit processing is configured as that the bottom of the curved panel unit is tightly attached to all the elevation adjustment pads 11 covered thereby.

[0073] In the embodiment, the preset processing method includes heating or pressing. In this way, the curved panel unit is quickly formed by heating or pressing.

[0074] Further, the method for manufacturing the spatial curved surface steel box girder further comprises: after the curved panel unit is manufactured, a stiffening rib is assembled on the curved panel unit. Since the curved panel unit is not in a flat state at this time, the stiffening rib can be partially disconnected and reconnected to eliminate the influence of the spatial curved surface on the installation of the stiffening rib.

[0075] Optionally, the positioning line includes a partition positioning line, a web positioning line, and an anchor box positioning line; and the components of the first segment of the spatial curved surface steel box girder 2 assembled on the assembled jig frame 1 according to the positioning line, except for the anchor pipe, include:

[0076] One of the curved panel units is fixed to the assembled jig frame 1 as the bottom plate of the first segment;

[0077] According to the partition positioning line, the web positioning line, and the anchor box positioning line, the partition, the web, and the anchor box unit element of the first segment are assembled on the bottom plate;

[0078] According to the partition positioning line, the web positioning line and the anchor box positioning line, the curved panel units on both sides of the first segment are assembled first, and then the curved panel units on the top of the first segment are assembled.

[0079] In this way, the assembly accuracy of the first segment except the anchor pipe is effectively increased under the action of the partition positioning line, the web positioning line and the anchor box positioning line.

[0080] Optionally, the positioning line further comprises an anchor pipe positioning line; and the anchor pipe is assembled on the first segment according to the three-dimensional coordinates of the positioning line and the corresponding curved panel, so as to complete the assembly of the first segment, which comprises:

[0081] The anchor pipe is positioned according to the anchor pipe positioning line, the anchor point coordinates of the anchor pipe and the out-rope point coordinates of the anchor pipe;

[0082] The anchor pipe is installed at the anchor box unit element to complete the assembly of the first segment.

[0083] In this way, the assembly accuracy of the anchor pipe of the first segment is effectively increased under the action of the anchor pipe positioning line, the anchor point coordinates and the out-rope point coordinates.

[0084] Optionally, after the installation of the anchor pipe is completed, the method further comprises:

[0085] Whether the parameters of the first segment meet the design requirements is measured in the unified coordinate system, wherein the parameters of the first segment comprise the out-rope point coordinates of the anchor pipe, the control point coordinates of the first segment and the box opening size of the first segment;

[0086] When the parameters of the first segment do not meet the design requirements, the assembly is re-performed.

[0087] In this way, after the first segment is manufactured, the situation that the first segment is not assembled accurately with other segments due to the size deviation can be effectively reduced.

[0088] It should be understood by the reader that the description of the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" and the like in the description of the specification means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the description, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, the skilled person in the art can combine and combine the different embodiments or examples described in the specification and the features of the different embodiments or examples without contradiction.

[0089] Although the present application has been disclosed with reference to the above embodiments, the scope of the present application is not limited to the above. Various changes and modifications can be made to the present application without departing from the spirit and scope thereof, and such changes and modifications are intended to fall within the scope of the present application.

Claims

1. A method for manufacturing a spatial curved steel box girder, characterized in that: The following steps are involved: S100, obtaining the three-dimensional coordinates of each curved panel unit of the spatial curved steel box girder according to a data model of the spatial curved steel box girder; S200, after establishing a unified coordinate system on the erection plane, erecting an assembly frame in combination with the three-dimensional coordinates of each of the curved panel units; wherein the assembly frame includes a plurality of elevation adjustment pads; S300, sequentially processing each of the curved panel units on the assembled cradle by adjusting the height of the elevation adjustment pad; S400, drawing positioning lines on all the curved panel units; S500, assembling components of the first segment of the spatial curved steel box girder except the anchor pipe on the assembly jig according to the positioning line; S600, assembling the anchor pipe on the first segment according to the positioning line and the three-dimensional coordinates corresponding to the curved panel unit to complete the assembly of the first segment; Repeat steps S500 to S600 until the assembly of the remaining segments of the spatial curved steel box girder is completed.

2. The method for manufacturing a spatial curved steel box girder according to claim 1, characterized in that: After establishing a unified coordinate system on the erection plane, erecting an assembly cradle in combination with the three-dimensional coordinates of each of the panel units includes: After the unified coordinate system is established, the coordinates of the control points on the horizontal plane of the curved panel unit are obtained and marked; The assembly frame is set up according to the identified control point coordinates.

3. The method for manufacturing a spatial curved steel box girder according to claim 2, characterized in that: The assembly frame further includes columns and beams; and the step of setting up the assembly frame according to the identified control point coordinates includes: Setting the pillar at the position of the identified control point coordinates; The plurality of columns arranged along the first direction are connected by the crossbeam, and the crossbeam is located a top portion of a plurality of said columns; A plurality of elevation adjustment pads are provided on the top of the beam, and the elevation adjustment pads are provided at positions of the beam corresponding to the coordinates of the control points.

4. The method for manufacturing a spatial curved steel box girder according to claim 3, characterized in that: The control point coordinates include the bending point coordinates of the curved panel unit, the partition line control point coordinates, the curvature change point coordinates and the anchor box installation line control point coordinates.

5. The method for manufacturing a spatial curved steel box girder according to claim 1, characterized in that: The step of sequentially processing each of the curved panel units on the assembled cradle by adjusting the height of the elevation adjustment pad comprises: Before processing the curved panel unit each time, adjusting all the elevation adjustment pads to a set height; A flat panel to be processed is laid on the assembly frame, and the panel to be processed is bent and deformed by a preset processing method until the curved panel unit is formed.

6. The method for manufacturing a spatial curved steel box girder according to claim 5, characterized in that: The preset processing method includes fire adjustment or weight pressing.

7. The method for manufacturing a spatial curved steel box girder according to claim 5, characterized in that: Also includes: After the curved panel unit is manufactured, stiffening ribs are assembled on the curved panel unit.

8. The method for manufacturing a spatial curved steel box girder according to claim 2, characterized in that: The positioning lines include a diaphragm positioning line, a web positioning line, and an anchor box positioning line; and the components of the first section of the spatial curved steel box girder assembled on the assembly jig according to the positioning lines, excluding the anchor pipe, include: Fixing one of the curved panel units to the assembled cradle as the bottom plate of the first segment; assembling the diaphragm, web and anchor box unit components of the first section on the bottom plate according to the diaphragm positioning lines, the web positioning lines and the anchor box positioning lines; The curved panel units on both sides of the first segment are assembled first according to the partition positioning line, the web positioning line and the anchor box positioning line, and then the curved panel unit on the top of the first segment is assembled.

9. The method for manufacturing a spatial curved steel box girder according to claim 8, characterized in that: The positioning line also includes an anchor pipe positioning line; and assembling the anchor pipe on the first segment according to the positioning line and the three-dimensional coordinates corresponding to the curved panel to complete the assembly of the first segment includes: Positioning the anchor pipe according to the anchor pipe positioning line, the anchor point coordinates of the anchor pipe and the anchor pipe cable-out point coordinates; The anchor pipe is installed at the anchor box unit to complete the assembly of the first segment.

10. The method for manufacturing a spatial curved steel box girder according to claim 9, characterized in that: After the anchor pipe is installed, the method further includes: Measuring parameters of the first segment in the unified coordinate system to determine whether they meet design requirements, wherein the parameters of the first segment include the coordinates of the cable-out point of the anchor pipe, the coordinates of each control point of the first segment, and the size of the box opening of the first segment; When the parameters of the first segment do not meet the design requirements, reassembly is performed.

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