Precision control method for high-precision construction and carrying of large-span deck segments

Abstract

The invention discloses a precision control method for segmented high-precision construction and carrying of a large-span deck, and the method specifically comprises the following steps: carrying out the manufacturing and precision control of a jig frame, carrying out the welding precision control of jointed plates, laying plates on the side of the deck from the center line of the jig frame, carrying out the lineation and precision control of a framework, and carrying out the assembly and precision control of the framework. The deck longitudinal bone is hung on the deck jointed board according to the installation position and positioned and welded, then the longitudinal girder, the cross beam and the bulkhead structure are sequentially hung, completed measurement and carrying precision control are conducted, deck segments are carried in an inlaying mode, and after all butt joint segments on the periphery of the deck are carried and welded, the deck joint board is obtained. And carrying out three-dimensional measurement on the butt joint area with the deck by using a total station. According to the method, the segmented construction strength and precision are improved, the total group positioning difficulty is reduced, the total group positioning error is reduced, and the efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of shipbuilding, and particularly relates to a precision control method for high-precision construction and mounting of large-span deck sections. BACKGROUND

[0002] In view of the characteristics of large-span deck sections, such as large transverse dimension, weak structure form strength, high flatness requirement of the deck surface after mounting, and no structural support below, which is prone to central collapse, the method is used to implement whole-process management and control on this type of section, and effective precision control measures are taken to improve the construction precision of the section, provide strong foundation guarantee for general assembly and mounting, improve efficiency, and reduce cost. SUMMARY

[0003] The present application aims to overcome the deficiencies in the prior art, and provides a precision control method for high-precision construction and mounting of large-span deck sections, which improves the construction strength and precision of the section, reduces the difficulty of general assembly positioning, reduces the error of general assembly positioning, and improves efficiency.

[0004] In order to achieve the above-mentioned application purpose, the technical scheme provided by the present application patent is as follows:

[0005] A precision control method for high-precision construction and mounting of large-span deck sections, which specifically comprises the following steps:

[0006] S1, cradle manufacturing and precision control, remove the debris in the section construction site, and draw the cradle center line and rib inspection line on the construction site through the laser theodolite, then draw the transverse and longitudinal grid lines, after the drawing is completed, use the total station instrument to measure the drawing precision of the construction site; install the cradle column on the construction site according to the construction drawing, and install the truss transverse bracing on the cradle column;

[0007] S2, precision control of plate welding, deck is laid from the center line of the cradle to the side, the center line of the deck is aligned with the center line of the cradle by using a line hammer, and the ground projection line of the bow and stern excess edge is parallel to the ground line rib inspection line; the deck plate and the cradle bracing are fixed by positioning welding;

[0008] S3, structure line drawing and precision control, the center line of the deck plate is taken as the reference, and the excess edge is taken as the reference to draw the structure installation line to the side and the stern part respectively, and the center line and the rib inspection line are checked by using the total station instrument before drawing;

[0009] S4, structure assembly and precision control, the deck longitudinal is hoisted onto the deck plate according to the installation position and positioned and welded, and then the longitudinal girder, cross beam and bulkhead structure are hoisted in turn;

[0010] S5, final measurement, after the completion of all the positioning welding of the deck segments and the cradle connection, the final measurement of the deck segments is carried out according to the final measurement drawing of the deck segments, three-dimensional measurement is carried out by using a total station, a theoretical model is matched with actual data by using ECO-BLOCK software, and the precision deviation of the horizontal, main dimension and the like is analyzed and corrected; finally, 150mm joint lines and segment center lines are drawn at four corners of the deck surface;

[0011] S6, precision control during loading, the deck segments are loaded by embedding and filling, after all the loading and welding of the abutting deck segments are completed, three-dimensional measurement is carried out on the abutting area of the deck by using a total station, simulated abutting is carried out on the deck segments by using ECO-OTS software, the abutting precision is analyzed, and the precision problems such as the deck allowance, the horizontal, the structural misplacement and the discontinuity are corrected in advance to ensure the abutting precision during hoisting; finally, 150mm joint lines and segment center lines are drawn at four corners of the deck segments and the abutting deck segments, the rapid positioning is carried out by using the joint lines during loading, and meanwhile, in order to prevent the deformation of the deck segments after loading, support frames are arranged below the deck segments before loading, and the support frames are removed after the loading and welding are completed.

[0012] Further, the rib distance is 600mm, the precision of the cradle center line and the rib detection line is ±1mm, after the cradle center line and the rib detection line are drawn, the cradle center line and the rib detection line are knocked by a chisel; 3-grade channel steels are embedded for transverse reinforcement, and are arranged dispersedly at the first, middle and tail positions and fixed by positioning welding between the deck and the channel steels.

[0013] Further, the cradle stand is installed with a middle arch deformation along the width direction, and the height is increased by 1.5mm every 1000mm to the two sides of the ship side based on the cradle center line.

[0014] Further, the positioning welding interval between the deck spliced boards and the cradle braces is 300mm, the center line alignment error is ±1mm, and arc extinguishing plates are respectively installed at both ends of the plate joint before the deck spliced boards and the cradle braces are welded, the size of the arc extinguishing plate is t*100*100, wherein t is the thickness of the thinner plate in the deck spliced boards.

[0015] Further, the positioning and welding in S4 is as follows: the longitudinal bone positioning and welding is burned at the side of the ball head of the ball flat steel, the deck longitudinal bone is welded by using an automatic angle welding machine, the welding is carried out in the order of division and retreat, the longitudinal bone is welded after two grades are burned, and then the longitudinal girder and the beam are hoisted and the bulkhead structure is arranged.

[0016] Further, the positioning welding interval of the strong frame is 200-300 mm, the positioning welding length of the strong frame is 50-80 mm, the positioning welding interval of the frame other than the strong frame is 150-200 mm, and the positioning welding length is 30-50 mm; the strong frame comprises a longitudinal girder and a strong rib.

[0017] Based on the above technical solution, the precision control method for high-precision construction and loading of large-span deck segments of the application has the following technical advantages after practical application:

[0018] 1. The precision control method for high-precision construction and loading of large-span deck segments of the application ensures the construction precision to meet the relevant design requirements by implementing whole-process precision control on each stage of the jig manufacturing, deck planking, welding, frame scribing, frame assembly, frame welding, completion measurement and loading, and adopting jig reverse deformation setting, strengthening setting, welding shrinkage allowance, total station three-dimensional measurement analysis, pre-simulation and other means, thereby improving the segment construction strength and precision, reducing the difficulty of total assembly positioning, reducing the error of total assembly positioning, and improving the efficiency.

[0019] 2. The precision control method for high-precision construction and loading of large-span deck segments of the application ensures the construction precision to meet the relevant design requirements by adopting jig reverse deformation setting, strengthening setting, welding shrinkage allowance, total station three-dimensional measurement analysis, pre-simulation and other means, thereby effectively avoiding the deformation and main size shrinkage or allowance cutting during the segment construction process, and further improving the segment construction and loading efficiency and precision, and releasing the crane resources. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a deck segment schematic diagram in the precision control method for high-precision construction and loading of large-span deck segments.

[0021] Figure 2 is a deck paneling schematic diagram in the precision control method for high-precision construction and loading of large-span deck segments.

[0022] Figure 3 is a jig reverse deformation schematic diagram in the precision control method for high-precision construction and loading of large-span deck segments. DETAILED DESCRIPTION

[0023] To make the purpose, technical solutions and advantages of the application more clear and understandable, the application will be described below through specific examples shown in the drawings. However, it should be understood that these descriptions are only exemplary and do not limit the scope of the application. In addition, in the following description, the description of known structures and technologies is omitted to avoid unnecessary confusion of the concept of the application.

[0024] Example 1

[0025] The application relates to a precision control method for large-span deck segment high-precision construction and loading, which comprises the following steps.

[0026] S1, tire frame manufacturing and precision control, removing sundries in a segment construction site, and drawing a tire frame center line and a rib inspection line in the construction site through a laser theodolite, then drawing a transverse and longitudinal grid line, after the line drawing is completed, measuring the line drawing precision of the construction site by using a total station instrument; installing a tire frame stand column on the construction site according to construction drawings, and installing a truss transverse bracing on the tire frame stand column;

[0027] pre-buried three-grade channel steel is used for horizontal strengthening, and is dispersedly arranged at the middle and tail of the deck, and is fixed by positioning welding;

[0028] S2, plate splicing precision control, deck plates are laid from the tire frame center line to the sides, the center line of the deck plates is controlled to be aligned with the tire frame center line by using a line hammer, and the ground projection line of the no-residual-edge bow and stern is parallel to the ground line rib inspection line; the deck plate splicing and the tire frame bracing are fixed by positioning welding;

[0029] S3, frame line drawing and precision control, the deck plate center line is used as a reference, and the no-residual-edge bow is used as a reference to draw a structure installation line to the sides and the stern respectively, and the center line and the rib inspection line are checked by using a total station instrument before drawing;

[0030] S4, frame assembly and precision control, deck longitudinal frames are hoisted onto the deck plate according to the installation positions and are positioned and welded, then longitudinal girders, cross beams and bulkhead structures are hoisted in sequence;

[0031] S5, completion measurement, after the completion of all the segment reverse-state electric welding, all the positioning welds connecting the deck segments and the tire frame are removed, then the deck segment completion measurement is carried out according to the deck segment completion measurement drawing, three-dimensional measurement is carried out by using a total station instrument, a theoretical model and actual data are matched and analyzed by using ECO-BLOCK software, the precision deviation of the horizontal, main dimension and the like is analyzed and corrected, and finally 150mm joint lines and segment center lines are drawn at four corners of deck smooth surfaces;

[0032] S6, loading precision control, the deck segments are loaded by embedding, after the completion of the welding of all the deck abutting segments, three-dimensional measurement is carried out on the abutting area of the deck by using a total station instrument, abutting is simulated by using ECO-OTS software and the deck segments, the abutting precision is analyzed, the deck excess, the horizontal, structure dislocation, height difference and other precision problems are corrected in advance, and the hoisting and abutting precision is ensured; finally, 150mm joint lines and segment center lines are drawn at four corners of the deck segments and the abutting segments, the joint lines are used for rapid positioning during loading, meanwhile, in order to prevent the deck segments from being deformed after being loaded, support frames are arranged under the deck segments before loading, and the support frames are removed after the completion of the loading welding.

[0033] The rib distance is 600 mm, the precision of the tire rack center line and the rib detection line is ±1 mm, after the tire rack center line and the rib detection line are drawn, knock the ocean along the tire rack center line and the rib detection line; embed 3 grooved steel for transverse reinforcement, and arrange the first, middle and tail parts dispersedly, and position and weld fixedly between the deck and the deck.

[0034] The tire rack stand is installed along the width direction and is deformed in the middle arch, and the height is increased to the two sides of the side, taking the tire rack center line as the reference, and the height is increased by 1.5 mm per 1000 mm.

[0035] The distance between the positioning welding of the deck plate and the tire rack brace is 300 mm, the center line alignment error is ±1 mm, the arc extinguishing plates are installed at both ends of the plate joint before the deck plate and the tire rack brace are welded, and the size of the arc extinguishing plate is t*100*100, wherein t is the plate thickness of the thinner plate in the deck plate.

[0036] The positioning and welding in S4 is that the longitudinal bone positioning and welding is burned on one side of the ball head of the ball flat steel, the deck longitudinal bone is welded by using an automatic fillet welding machine, the welding is performed according to the sequence of division and retreat welding, the longitudinal bone is welded after one row is burned, and then the longitudinal girder and the beam are hoisted and the bulkhead structure is installed.

[0037] The positioning welding distance of the strong frame is 200-300 mm, the positioning welding length of the strong frame is 50-80 mm, the positioning welding distance of the frame except the strong frame is 150-200 mm, and the positioning welding length is 30-50 mm; the strong frame includes the longitudinal girder and the strong rib.

[0038] Finally, it should be noted that: the above examples are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that; the specific embodiments of the application can be modified or some technical features can be replaced by equivalent; without departing from the spirit of the technical solutions of the present application, they should be covered in the technical solution range of the present application.

Claims

1. A precision control method for high-precision construction and mounting of a large-span deck segment, characterized in that, The method specifically comprises the following steps: S1, the frame is made and the precision is controlled, the segmented construction site is cleared of sundries, and the frame center line and the rib inspection line are drawn on the construction site through a laser theodolite, then the horizontal and vertical grid lines are drawn, after the drawing is completed, the drawing precision of the construction site is measured by using a total station instrument; according to the construction drawing, the frame stand is installed on the construction site, and a truss horizontal bracing is installed on the frame stand; S2, the plate welding precision is controlled, the deck is laid from the frame center line to the side, the center line of the deck is aligned with the frame center line by using a line hammer, and the ground projection line of the bow and stern non-excess edge is parallel to the ground line rib inspection line; the deck plate and the frame bracing are fixed by positioning welding; S3, the frame is drawn and the precision is controlled, the structure installation line is surveyed to the side and the stern according to the deck plate center line and the non-excess edge as the reference, and the center line and the rib inspection line angle scale are checked by using a total station instrument before the surveying; S4, the frame is assembled and the precision is controlled, the deck longitudinal is hoisted on the deck plate according to the installation position and is positioned and welded, then the longitudinal truss, the beam and the bulkhead structure are hoisted in sequence; S5, the completion measurement, after the segmented reverse state electric welding is completed, all the positioning welds of the deck segment and the frame connection are removed, then the deck segment completion measurement is carried out according to the deck segment completion measurement drawing, the three-dimensional measurement is carried out by using a total station instrument, the theoretical model and the actual data are matched and analyzed by using ECO-BLOCK software, the horizontal, main size and other precision deviation conditions are analyzed and corrected; finally, 150mm joint lines and deck segment center lines are drawn at four corners of the deck surface; S6, the loading precision control, the deck segment is loaded by the embedded method, after the deck four surrounding joint segments are all loaded and welded, the three-dimensional measurement is carried out on the deck joint area by using a total station instrument, the ECO-OTS software is used to simulate the joint of the deck segment, the joint precision is analyzed, the deck excess, the horizontal, the structure dislocation, the gap and other precision problems are corrected in advance, and the hoisting joint precision is ensured; finally, 150mm joint lines and deck segment center lines are drawn at four corners of the deck segment and the joint segment, the joint lines are used for rapid positioning during the loading, and meanwhile, in order to prevent the deck segment from being deformed after the loading, support frames are arranged under the deck segment before the loading, and then the support frames are removed after the loading welding is completed.

2. The precision control method for high-precision construction and mounting of large-span deck segments according to claim 1, characterized in that, The rib distance is 600mm, the precision of the frame center line and the rib inspection line is ±1mm, after the frame center line and the rib inspection line are drawn, the frame center line and the rib inspection line are knocked by a Chinese chisel; 3-grade channel steel is embedded for horizontal strengthening, and is arranged in the middle of the first, the second and the third, and is fixed by positioning welding between the deck.

3. The precision control method for high-precision construction and mounting of large-span deck segments according to claim 1, characterized in that, When the frame stand is installed, the middle arch deformation is arranged along the width direction, the height is increased to the side of the frame center line, and the height is increased by 1.5mm every 1000mm.

4. The precision control method for high-precision construction and mounting of large-span deck segments according to claim 1, characterized in that, The positioning welding spacing between the deck plate and the frame bracing is 300mm, the center line alignment error is ±1mm, the arc extinguishing plates are installed at both ends of the plate joint before the deck plate and the frame bracing are welded, and the size of the arc extinguishing plate is t*100*100, wherein t is the plate thickness of the thinner plate in the deck plate.

5. The precision control method for high-precision construction and mounting of large-span deck segments according to claim 1, characterized in that, The positioning and welding in the S4 is specifically that longitudinal bone positioning and welding is performed on one side of the ball head of the ball flat steel, an automatic fillet welder is used to weld the deck longitudinal bone, welding is performed according to the sequence of division and retreat welding, and after one pitch is welded, two pitches are left to weld the longitudinal bone, and then the longitudinal girder and the beam are hoisted and the bulkhead structure is hoisted.

6. The precision control method for high-precision construction and mounting of large-span deck segments according to claim 5, characterized in that, The positioning and welding interval of the strong frame is 200mm-300mm, the positioning and welding length of the strong frame is 50mm-80mm, the positioning and welding interval of the frame other than the strong frame is 150mm-200mm, and the positioning and welding length is 30mm-50mm; the strong frame comprises a longitudinal girder and a strong rib.

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