Construction method for segmental assembly of torsion box

Abstract

The construction method comprises the following steps that an adjustable movable supporting system is preset on a total assembly jig frame, jig frame datum lines are drawn, and the jig frame datum lines comprise a ground jig frame center line, a rib inspection line, a segmentation port projection line and an outer plate and inner longitudinal wall inspection line; the S side plate of the torsion box is hoisted to the total assembly jig frame in a segmented mode, and the segmented inner longitudinal wall inspection line and the jig frame inner longitudinal wall inspection line are folded; the levelness of the segmented deck surface is measured through a total station, and the height is adjusted through the adjustable supporting system; positioning the bow and stern directions of the segments based on a ground rib detection line, positioning the front and back directions of the segments based on the center line and the length size of the block, and reserving welding compensation in the length direction; positioning and welding at the lower ports of the sections; and assembling the segmented closure seams after the total assembly is completed. Under the condition that the construction quality is guaranteed, the operation amount of the crane is reduced, and compared with a past total assembly mode, the construction period and cost can be greatly shortened, and the undocking period is shortened.

Description

Technical Field

[0001] The present application relates to the technical field of ship construction methods, and in particular to a construction method for a torsion box segment assembly. Background Art

[0002] In the construction of 16,000TEU container ships, the construction process of torsion box sections and hatch coaming sections is relatively conservative due to lack of experience. The two are manufactured separately and hoisted and loaded separately during the docking phase, resulting in a long assembly cycle and restricting the docking cycle. At the same time, the current positioning method of the torsion box section assembly is inefficient and has a long positioning cycle, which affects the utilization of high-altitude resources in the dock and the shortening of the docking cycle. Specifically, the existing positioning method relies on the crane to adjust the section posture for a long time to achieve positioning accuracy, which occupies a large amount of crane resources; the torsion box is divided into two layers, and the data of the hoisted sections must be taken into account during positioning, which increases the difficulty of positioning; the 62 S-side plate sections of the entire ship are composed of 22 groups of torsion box sections, and the hoisting and positioning of each S section takes an average of 8 hours, which seriously affects the construction progress. Summary of the Invention

[0003] The purpose of the embodiments of the present invention is to provide a construction method for a torsion box segment assembly, which can solve the above-mentioned problems existing in the prior art.

[0004] To achieve the above objectives, this application adopts the following technical solutions: In one aspect, a construction method for a torsion box segment assembly is provided, comprising the following specific steps: An adjustable flexible support system is pre-set on the assembly cradle, and the cradle reference lines are marked, including the ground cradle centerline, rib inspection line, segmented port projection line, and outer plate and inner longitudinal wall inspection lines; Hoist the S side panels of the torsion box in sections onto the assembly frame, aligning the longitudinal wall inspection line of the sections with the longitudinal wall inspection line of the frame, with an accuracy deviation of ≤2mm; Measure the levelness of the segmented deck surface using a total station, and adjust the height using the movable support system so that the horizontal deviation of the segmented deck is ≤4mm; The bow and stern directions of the sections are positioned based on the ground rib inspection line, with an accuracy deviation of ≤2mm. The fore and aft directions of the sections are positioned based on the centerline and length dimensions of the entire section, with a welding compensation of +5mm to +10mm reserved in the length direction. The lower end of the segment is welded with channel steel for rigid positioning, and diagonal bracing is welded on both sides of the segment to prevent it from tipping over. After the overall assembly is completed, the sections are assembled with the seams closed and welded after passing the inspection.

[0005] Furthermore, in the above steps, the drawing of the tire frame reference line includes: drawing a center line, a rib inspection line perpendicular to the center line, a segmented port projection boundary line, and an installation positioning inspection line of the outer plate and the inner longitudinal wall on the tire frame ground according to the preset position of the torsion box segment.

[0006] Furthermore, in the above steps, when the S side panels of the torsion box are hoisted in sections to the assembly tire frame, the section rib position lines are aligned with the tire frame rib inspection lines, with an accuracy deviation of ≤2mm.

[0007] Furthermore, in the above steps, the level adjustment includes: adjusting the overall level of the segment through the active support system according to data of preset measurement points on the segment deck surface.

[0008] Furthermore, in the above steps, the total section length before welding is controlled within 0~+5mm, the deviation of the rib distance of the segmented closing mouth is ±5mm, and the dimensional tolerance of the longitudinal spacing of the compartment position after welding is 0~+5mm.

[0009] Furthermore, in the above steps, based on the segmented three-dimensional data collected by the total station, the dislocation and linear deviation of the closing seam are analyzed through computer simulation, the remaining cutting value is determined and the cutting is completed before lifting.

[0010] Furthermore, in the above steps, the bow and stern port margin lines are drawn according to the total group length and the data of the adjacent rib positions of the closing seam, and manual template gas cutting is adopted, and the gas cutting surface roughness is ≤0.4mm.

[0011] Furthermore, the active support system includes a plurality of independent height-adjustable active support heads arranged along the length direction of the segment. According to the weight distribution of the torsion box segment and the closing stress prediction model, the pre-adjusted height value of each active support head is calculated, and the active support head is adjusted to the pre-adjusted height before lifting.

[0012] Furthermore, in the above steps, differentiated preloads are applied to the support points according to the position of the segment center of gravity, so that the active support head produces an elastic pre-deformation δ, which is calculated as follows: δ=k·(W / L)·e^(-μ·d), where: k is the material deformation coefficient, W is the segment weight, L is the support span, μ is the friction factor, and d is the distance between the support point and the center of gravity.

[0013] Furthermore, in the above steps, a segmented attitude feedback control system is established, which uses the total station data as input and outputs the adjustment instructions of the active support head in real time. Each active support head is equipped with a servo motor drive with an adjustment accuracy of ±0.1mm.

[0014] The beneficial effects of the present application are as follows: by pre-setting an adjustable flexible support system and a precise tire frame reference line, a precise reference is provided for the segment lifting and positioning, which effectively improves the positioning accuracy, controls the precision deviation of the segment inner longitudinal wall inspection line and the tire frame inner longitudinal wall inspection line to ≤2mm, controls the horizontal deviation of the segment deck to ≤4mm, and controls the positioning precision deviation of the segment bow and stern direction to ≤2mm, which greatly improves the construction quality of the torsion box segment assembly. The use of an adjustable flexible support system to adjust the horizontality of the segment deck surface avoids the problem of long-term occupation of crane resources due to the difficulty in adjusting the segment posture in traditional methods, improves construction efficiency, shortens the assembly positioning cycle, and is conducive to the efficient use of high-altitude resources in the dock and the shortening of the dock cycle. The use of channel steel rigid positioning welding at the lower end of the segment and the welding of diagonal brace anti-dumping structures on both sides of the segment enhances the stability of the segment during the assembly process and reduces the safety risks during construction. At the same time, welding compensation is reserved in the length direction, which fully takes into account the shrinkage deformation during the welding process, ensures the dimensional accuracy of the torsion box segment after welding, reduces the rework and correction work caused by welding deformation, further improves construction efficiency and quality, and reduces construction costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present application is further described in detail below with reference to the accompanying drawings and examples.

[0016] Figure 1 This is a flow chart of the construction method of the torsion box segment assembly described in an embodiment of the present application. DETAILED DESCRIPTION

[0017] To make the technical problems solved by this application, the technical solutions adopted, and the technical effects achieved more clearly, the technical solutions of the embodiments of this application are further described in detail below. Obviously, the embodiments described are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making any creative efforts shall fall within the scope of protection of this application.

[0018] In the description of this application, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and can refer to internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0019] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0020] like Figure 1 As shown, this embodiment provides a construction method for a torsion box segment assembly, comprising the following specific steps: S1: An adjustable, flexible support system is pre-installed on the assembly cradle, and cradle baselines are marked. These include the cradle centerline, rib inspection lines, segmented port projection lines, and inspection lines for the outer plate and inner longitudinal wall. Marking the cradle baselines allows construction personnel to quickly and accurately locate the various cradle components, reducing installation errors and significantly improving cradle construction efficiency and quality. Furthermore, clear baselines provide a visual reference for subsequent quality inspections, facilitating the timely detection and correction of deviations during construction.

[0021] S2: Hoist the S-side panels of the torsion box in sections onto the assembly cradle, aligning the inspection lines on the inner longitudinal walls of the sections with those on the cradle with an accuracy of ≤2mm. Aligning the cradle baseline provides a unified reference for different components, ensuring a tight fit during assembly and avoiding misalignment. This significantly reduces rework, shortens the cradle assembly cycle, and improves overall structural stability. Furthermore, precise baseline alignment effectively ensures that all cradle dimensions meet design standards and project quality requirements.

[0022] S3, measure the levelness of the segmented deck surface using a total station, and adjust the height using the flexible support system so that the horizontal deviation of the segmented deck is ≤4mm; measuring the levelness of the segmented deck can immediately discover problems such as deck deformation and tilt, ensuring that the flatness of the segmented deck meets the design requirements, laying a solid foundation for subsequent installation operations, and avoiding poor connection of outfitting parts due to levelness deviation.

[0023] S4, based on the ground rib inspection line, locates the sections forward and aft with an accuracy deviation of ≤2mm. The sections are located forward and backward based on the centerline and length of the overall section, with a welding compensation allowance of +5mm to +10mm in the length direction. The positioning of the fore and aft assembly sections creates a precise overall structure for hull construction, allowing for orderly connection between sections and minimizing dimensional deviations and assembly conflicts. This not only significantly improves construction efficiency and reduces the manpower and material resources consumed by rework, but also ensures a smooth hull line.

[0024] S5, use channel steel for rigid positioning welding at the lower end of the segment, and weld diagonal bracing anti-dumping structures on both sides of the segment; S6, after the overall assembly is completed, the sections are assembled with the joints closed and welded after passing the inspection.

[0025] Based on the above solution, an adjustable flexible support system was pre-installed on the assembly jig, and a jig baseline with various key inspection lines was marked, providing a precise reference for subsequent segment hoisting and positioning. The S-shaped side panels of the torsion box were hoisted onto the assembly jig in sections. The initial precise lateral positioning of the sections was ensured by aligning the inspection lines on the inner longitudinal walls of the sections with those on the jig. The levelness of the segment decks was then measured using a total station. The height was adjusted using the adjustable flexible support system to ensure that the decks were within the allowable horizontal deviation range, ensuring vertical flatness. The sections were then positioned forward and aft, and fore and aft, based on the ground rib inspection lines and the centerline of the section. Welding offsets were reserved to allow for adjustment during subsequent welding and ensure dimensional accuracy after welding. Channel steel was used to rigidly position the lower ends of the sections, and diagonal bracing was welded on both sides to prevent them from shifting or tipping during subsequent construction. Finally, after the overall assembly is completed, the sections are assembled with the seams closed and welded after passing the inspection to ensure the quality of the entire torsion box section assembly.

[0026] Furthermore, in step S1, the drawing of the tire frame reference line includes: based on the preset position of the torsion box segment, drawing a centerline, a rib inspection line perpendicular to the centerline, a segment port projection boundary line, and an installation positioning inspection line for the outer plate and inner longitudinal wall on the tire frame ground. First, the centerline is drawn. It acts as the "backbone" of the entire tire frame, providing the most basic directional guidance for all subsequent positioning operations and clarifying the core position of the torsion box segment in the longitudinal direction. The rib inspection line perpendicular to the centerline is used to accurately locate the segment rib position. The rib position is an important strength support point in the hull structure. By drawing the rib inspection line, the accurate position of each rib position in the width direction of the segment can be ensured, so that the segment structure can be correctly spliced according to the design requirements during assembly. The drawing of the segment port projection boundary line is based on the final placement state of the segment on the tire frame, simulating the projection range of the segment port on the ground, providing an intuitive boundary reference for the initial positioning of the segment during lifting, and preventing the segment from exceeding the predetermined position during lifting. The installation positioning inspection lines for the outer plating and inner longitudinal walls are key structural components for the torsion box segments. The outer plating determines the outer contour of the hull, while the inner longitudinal walls affect the internal structural strength and stability of the hull. These two inspection lines provide precise positioning references for the installation of the outer plating and inner longitudinal walls, ensuring that they perfectly fit the designed positions during installation.

[0027] Furthermore, in step S2, during the hoisting of the torsion box's S-side panel segments onto the assembly jig, the segment rib position lines are aligned with the jig rib inspection lines with an accuracy of ≤2mm. Ribs play a crucial supporting and connecting role in the hull structure and are a key factor in determining hull strength and stability. The jig rib inspection lines are precise reference lines pre-delineated on the jig according to design requirements. They represent the ideal position of the segment ribs on the jig. The segment rib position lines, in turn, are the actual identifiers of the segment's rib position. When the segment is hoisted onto the jig, precise hoisting operations and meticulous positioning adjustments are used to gradually bring the segment rib position lines and the jig rib inspection lines closer together and ultimately align. This process requires the use of specialized hoisting equipment and measurement tools, such as total stations, to monitor and provide feedback on the segment's position in real time. Based on the measurement results, construction personnel fine-tune the segment's position to ensure that the horizontal and vertical deviations between the segment rib position lines and the jig rib inspection lines are within ≤2mm. This high-precision alignment can ensure that the installation position of the segments on the tire frame is highly consistent with the design requirements, creating good conditions for subsequent welding and assembly work.

[0028] In some embodiments, in step S3, level adjustment includes adjusting the overall levelness of the segmented deck surface using the flexible support system based on data from preset measurement points on the segmented deck surface. The data from the preset measurement points on the segmented deck surface is crucial; these measurement points are predetermined based on factors such as the hull structural design, stress analysis, and subsequent equipment installation requirements. Each measurement point corresponds to the desired level of the deck at a specific location, and together they form a data network reflecting the overall leveling of the deck. The flexible support system acts as the executor of the adjustment. The system consists of multiple independently adjustable flexible support heads, each capable of height adjustment within a certain range. After obtaining the data from the preset measurement points on the segmented deck surface, construction personnel use professional measuring tools (such as a level or total station) to measure the actual level of each measurement point, compare it with the preset data, and calculate the deviation value for each measurement point. Based on these deviation values, the height of the flexible support heads at the corresponding locations is adjusted in a targeted manner. For example, if the actual height of a certain measurement point is lower than the preset value, the active support head near that location is raised; conversely, if the actual height is higher than the preset value, the support head is lowered. In this way, the deviation of each measurement point is gradually eliminated, and ultimately the overall levelness of the segment meets the design requirements.

[0029] In step S4, the total length of the section before welding is controlled within a range of 0 to +5 mm, the deviation of the rib spacing of the segmented closure is ±5 mm, and the longitudinal spacing of the compartment positions after welding has a dimensional tolerance of 0 to +5 mm. The total length of the section before welding is controlled within a range of 0 to +5 mm to account for the thermal expansion of the steel due to heat during welding. During welding, high temperatures can cause changes in the lattice structure within the steel, causing it to expand. A certain positive tolerance (+5 mm) is pre-set for the total length to allow for welding expansion, prevent the total length of the section from exceeding the design requirements after welding, ensure that the overall dimensions of the hull meet the design standards, and maintain the stability and strength of the hull structure.

[0030] The rib spacing deviation of the block closure is controlled within ±5mm. As a critical support and connection point for the hull structure, the accuracy of rib positioning is directly related to the overall strength and stability of the hull. This ±5mm deviation range is determined after comprehensively considering construction errors, measurement errors, and the hull structure's tolerance for rib position deviation. This range ensures smooth block docking during closure and evenly distributes force across the ribs when the hull structure is subjected to stress, avoiding localized stress concentration caused by excessive rib spacing deviation, which could impact the safety and reliability of the hull.

[0031] The post-weld dimensional tolerance for the longitudinal spacing of bulkheads is 0 to +5mm. Bulkheads play an important role in separating compartments within the hull, enhancing the structural strength of the hull, and ensuring the hull's watertightness. During welding, the position of bulkheads may shift due to factors such as welding deformation. Maintaining a post-weld dimensional tolerance of 0 to +5mm ensures the accuracy of bulkhead positioning and conformance to the design layout of the internal compartments. Furthermore, a certain positive tolerance compensates for shrinkage that may occur during welding, ensuring the stability and tightness of the bulkhead structure within the hull.

[0032] In the above step S6, the three-dimensional data of the segments are collected based on the total station, and the misalignment and linear deviation of the closing seam are analyzed through computer simulation. The margin cutting value is determined and the cutting is completed before lifting. The bow and stern port margin lines are drawn according to the total group length and the data of the adjacent ribs of the closing seam. Manual gas cutting is adopted, and the surface roughness of the gas cutting is ≤0.4mm. As a high-precision measuring instrument, the total station can quickly and accurately collect the three-dimensional data of the segments, including the spatial position, size, shape and other information of the segments. These data are the basis for subsequent computer simulation and ensure the accuracy and reliability of the simulation. The computer simulation uses professional software to import the collected three-dimensional data of the segments and compare and analyze them with the design data. Through the simulated loading process, the state of the segments when closing can be intuitively seen, including the misalignment of the closing seam and the linear deviation. This is because the hull segments may undergo certain deformation during the manufacturing and transportation process, resulting in differences between the actual size and the design size. Computer simulation can detect these problems in advance and avoid the situation where the parts cannot be closed or the closing quality is poor due to dimensional deviation during the actual lifting process.

[0033] The allowance cutting value is determined based on the results of the simulated loading. Allowance cutting is performed to eliminate deformation of the segments during manufacturing and transportation, ensuring they can be perfectly closed after hoisting. Completing allowance cutting before hoisting can greatly improve hoisting efficiency and reduce the time and workload of on-site adjustments. Marking the bow and stern port allowance lines based on the overall assembly length and the position of the adjacent ribs of the closing seam provides clear guidance for allowance cutting. The overall assembly length and the position of the adjacent ribs of the closing seam are important data for determining the position and range of the allowance cutting. Precise marking ensures the accuracy of the allowance cutting.

[0034] Manual tracing gas cutting is used for excess cutting, a traditional yet highly precise cutting method. Tracing ensures straightness and shape accuracy during the cutting process. By controlling cutting parameters such as gas pressure and cutting speed, the surface roughness of the cut is maintained at ≤0.4mm. Lower surface roughness reduces subsequent grinding and finishing, improving cutting quality and also improving welding quality, as a rough cut surface can affect weld formation and strength.

[0035] In some embodiments, the flexible support system includes a plurality of independently height-adjustable flexible support heads arranged along the length of the segment. The pre-adjusted height value of each flexible support head is calculated based on the weight distribution of the torsion box segment and the closing stress prediction model, and the flexible support head is adjusted to the pre-adjusted height before lifting. The flexible support system arranges a plurality of independently height-adjustable flexible support heads along the length of the segment to meet the support requirements of the torsion box segment at different positions. The weight distribution of the torsion box segment in the length direction is often uneven, and the weight difference in different parts will cause the segment to settle unevenly when placed.

[0036] The closing stress prediction model is based on an analysis of multiple factors, including the structural characteristics, material properties, and subsequent closing process of the torsion box segments. This model simulates the forces acting on the segments during closing and predicts the magnitude and distribution of stresses likely to occur in each part. By inputting the weight distribution data of the torsion box segments into the closing stress prediction model, the model, based on mechanical principles and structural analysis algorithms, calculates the load required of each active support head and, in turn, determines the pre-adjusted height value for each active support head.

[0037] Adjusting the flexible support head to a pre-adjusted height before hoisting takes advantage of the head's height-adjustability. By precisely adjusting the support head's height, the segments remain relatively balanced and stable when placed on the support system, avoiding localized excessive stress or deformation caused by uneven weight distribution. This also creates favorable conditions for subsequent closing operations, reducing additional stress caused by improper support during the closing process.

[0038] Specifically, according to the position of the segment's center of gravity, a differentiated preload is applied to the support point, causing the flexible support head to produce an elastic pre-deformation δ, calculated as follows: δ = k·(W / L)·e^(-μ·d), where k is the material deformation coefficient, W is the segment weight, L is the support span, μ is the friction factor, and d is the distance between the support point and the center of gravity. First, the key factor of the segment's center of gravity position is clarified. Due to the uneven distribution of the segment weight, different support points need to bear different loads, resulting in differentiated preloads. Then, the elastic pre-deformation δ of the flexible support head is calculated using a specific formula. In the formula δ = k·(W / L)·e^(-μ·d), k represents the material deformation coefficient, reflecting the elastic deformation characteristics of the material when subjected to force; W is the segment weight, which directly affects the support system load; L is the support span, which is related to the stiffness and stability of the support system; μ is the friction factor, reflecting the friction characteristics between the support point and the segment; d is the distance between the support point and the center of gravity, which determines the load it needs to bear. After calculating the pre-deformation of each support point according to this formula, the height of the flexible support head is adjusted to produce corresponding elastic deformation when supporting the segment, thereby offsetting the deformation caused by the segment's own weight and ensuring the effective operation of the support system.

[0039] This method of applying differentiated preloads based on the center of gravity of the segments brings many significant benefits. From the perspective of structural safety, it can effectively reduce the deformation and stress concentration of the segments during the support process, greatly improve the structural stability and safety of the segments, and ensure the reliability of the subsequent operation of the ship. In terms of construction efficiency, accurate calculation of pre-deformation and adjustment of support head height improve the accuracy of the support system, laying a good foundation for subsequent welding and closing operations. At the same time, it reduces the frequency of rework and adjustments caused by support problems during construction, shortens the construction period, speeds up the construction progress, and reduces construction risks and costs. From the perspective of quality control, it helps to improve the first-time pass rate of hull construction and reduce quality problems. In addition, this operation reflects the application of scientific computing and intelligent technology in modern shipbuilding, promotes the continuous development and innovation of shipyard construction technology, and enhances the market competitiveness of shipyards.

[0040] More specifically, a segmented attitude feedback control system is established, which uses total station data as input and outputs adjustment instructions for the active support heads in real time. Each active support head is equipped with a servo motor drive with an adjustment accuracy of ±0.1mm. In the optimization of the support system for shipbuilding, the establishment of a segmented attitude feedback control system is the core link to achieve precise support. The system uses high-precision three-dimensional data collected by the total station as input source. The total station can monitor the spatial position, attitude and deformation of the segment in real time. By connecting the total station data to the control system, the system can analyze the deviation between the actual attitude of the segment and the theoretical design attitude in real time.

[0041] Based on real-time data feedback, the segmented posture feedback control system utilizes advanced control algorithms to calculate the required adjustment for each active support head and output the corresponding adjustment instructions. Each active support head is equipped with a high-precision servo motor drive. The servo motors offer fast response and high control accuracy, enabling precise adjustment of the support head's height and position according to the control system's instructions. Driven by the servo motors, the active support heads achieve an adjustment accuracy of ±0.1mm, ensuring the support system's ability to respond accurately and in real time to changes in segmented posture.

[0042] In the description herein, it should be understood that the terms "upper," "lower," "left," "right," and other positions or relationships are used solely for ease of description and simplified operation, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0043] In this specification, reference to terms such as "one embodiment" or "example" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example.

[0044] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0045] The technical principles of the present application have been described above in conjunction with specific embodiments. These descriptions are intended solely to explain the principles of the present application and are not to be construed in any way as limiting the scope of protection of the present application. Based on the explanations herein, those skilled in the art will be able to devise other specific implementations of the present application without inventive effort, and such implementations will fall within the scope of protection of the present application.

Claims

1. A construction method for a torsion box segmented assembly, characterized in that: The following steps are involved: An adjustable flexible support system is pre-set on the assembly cradle, and the cradle reference lines are marked, including the ground cradle centerline, rib inspection line, segmented port projection line, and outer plate and inner longitudinal wall inspection lines; Hoist the S side panels of the torsion box in sections onto the assembly frame, aligning the longitudinal wall inspection line of the sections with the longitudinal wall inspection line of the frame, with an accuracy deviation of ≤2mm; Measure the levelness of the segmented deck surface using a total station, and adjust the height using the movable support system so that the horizontal deviation of the segmented deck is ≤4mm; The bow and stern directions of the sections are positioned based on the ground rib inspection line, with an accuracy deviation of ≤2mm. The fore and aft directions of the sections are positioned based on the centerline and length dimensions of the entire section, with a welding compensation of +5mm to +10mm reserved in the length direction. The lower end of the segment is welded with channel steel for rigid positioning, and diagonal bracing is welded on both sides of the segment to prevent it from tipping over. After the overall assembly is completed, the sections are assembled with the seams closed and welded after passing the inspection.

2. The construction method of the torsion box segment assembly according to claim 1 is characterized in that: In the above steps, the drawing of the tire frame reference line includes: drawing the center line, the rib inspection line perpendicular to the center line, the segment port projection boundary line, and the installation positioning inspection line of the outer plate and the inner longitudinal wall on the tire frame ground according to the preset position of the anti-torsion box segment.

3. The construction method of the torsion box segment assembly according to claim 1, characterized in that: In the above steps, when the S side panels of the torsion box are hoisted in sections to the assembly tire frame, the section rib position lines are aligned with the tire frame rib inspection lines, with an accuracy deviation of ≤2mm.

4. The construction method of the torsion box segment assembly according to claim 1 is characterized in that: In the above steps, the level adjustment includes: adjusting the overall level of the segment through the active support system according to the data of the preset measurement points on the segment deck surface.

5. The construction method of the torsion box segment assembly according to any one of claims 1 to 4, characterized in that: In the above steps, the total section length before welding is controlled within 0~+5mm, the deviation of the rib distance of the segmented closing mouth is ±5mm, and the dimensional tolerance of the longitudinal spacing of the compartment position after welding is 0~+5mm.

6. The construction method of the torsion box segment assembly according to any one of claims 1 to 4, characterized in that: In the above steps, segmented three-dimensional data is collected based on the total station, and the misalignment and linear deviation of the closing seam are analyzed through computer simulation, the remaining cutting value is determined, and the cutting is completed before lifting.

7. The construction method of the torsion box segment assembly according to claim 6, characterized in that: In the above steps, the bow and stern port allowance lines are drawn according to the total group length and the adjacent rib position data of the closing seam, and manual template gas cutting is adopted, and the gas cutting surface roughness is ≤0.4mm.

8. The construction method of the torsion box segment assembly according to any one of claims 1 to 4, characterized in that: The active support system includes multiple independent height-adjustable active support heads arranged along the length direction of the segment. According to the weight distribution of the torsion box segment and the closing stress prediction model, the pre-adjusted height value of each active support head is calculated, and the active support head is adjusted to the pre-adjusted height before lifting.

9. The construction method of the torsion box segment assembly according to claim 8, characterized in that: In the above steps, differentiated preloads are applied to the support points according to the position of the segment center of gravity, so that the active support head produces an elastic pre-deformation δ, which is calculated as follows: δ=k·(W / L)·e^(-μ·d), where: k is the material deformation coefficient, W is the segment weight, L is the support span, μ is the friction factor, and d is the distance between the support point and the center of gravity.

10. The construction method of the torsion box segment assembly according to claim 9, characterized in that: In the above steps, a segmented attitude feedback control system is established, which uses the total station data as input and outputs the adjustment instructions of the active support head in real time. Each active support head is equipped with a servo motor drive with an adjustment accuracy of ±0.1mm.

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