A method for constructing a steel box girder

Abstract

The present invention discloses a method for constructing a steel box girder. The method comprises the following steps: setting grid lines in a workshop, establishing a virtual coordinate system of the workshop, utilizing software to establish three-dimensional models of each segment of the steel box girder, and importing the models into the virtual coordinate system of the workshop. During the construction process, the actual three-dimensional coordinate data of each segment of the steel box girder measured are compared with the three-dimensional coordinate data of the steel box girder segment in the virtual coordinate system of the workshop in real time to obtain a first deviation value and a second deviation value, thereby adjusting the steel box girder segment under construction according to the first deviation value and the second deviation value, thereby completing the construction of the steel box girder segment. The steel box girder segment is constructed with high precision. After the construction of each segment of the steel box girder is completed, the constructed segments of the steel box girder can be closed, and no reserved positions for pre-assembly are required during the entire construction process.

Description

Technical Field

[0001] The present invention relates to the technical field of shipbuilding, in particular to a method for constructing a steel box girder. Background Art

[0002] In the relevant technology, steel box girders are generally manufactured in sections and then welded into a whole due to their large volume and weight. During the manufacturing process of the steel box girder sections, in order to ensure the accuracy of the box girder, the steel box girder sections are required to be pre-assembled to avoid misalignment of the closing structure. However, during the construction process, in order to ensure the normal progress of the pre-assembly, a position needs to be reserved for hoisting in each round, resulting in a waste of position resources. In addition, the hoisting and pre-assembly process is also relatively complicated, which seriously affects the production progress. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a method for constructing a steel box girder, which sets grid lines in a workshop, establishes a workshop virtual coordinate system, uses software to establish three-dimensional models of each segment of the steel box girder, and imports them into the workshop virtual coordinate system. During the construction process, the actual three-dimensional coordinate data of each segment of the steel box girder measured is compared with the three-dimensional coordinate data of the steel box girder segment in the workshop virtual coordinate system in real time to obtain a first deviation value and a second deviation value, thereby adjusting the steel box girder segment under construction according to the deviation value, thereby completing the construction of the steel box girder segment. The steel box girder segment is constructed with high accuracy. After the construction of each segment of the steel box girder is completed, the constructed steel box girder segment can be closed, and the entire construction process does not require reserved positions for pre-assembly.

[0004] According to some embodiments of the present invention, a method for constructing a steel box girder is provided, wherein the steel box girder is welded from a plurality of segments, each of the segments having a closure, and each of the segments being welded from a plurality of bridge plates, each of which having a transverse base line and a longitudinal base line. The method for constructing a steel box girder comprises:

[0005] Grid lines are set up in the workshop, wherein the length direction of the grid lines coincides with the horizontal baseline of the plate, and the width direction of the grid lines coincides with the vertical baseline of the plate;

[0006] Make tire frames and set up height auxiliary lines;

[0007] Establishing a workshop virtual coordinate system based on the plate horizontal baseline, the plate vertical baseline and the height auxiliary line;

[0008] Using software to create a three-dimensional model of each segment of the steel box girder, and importing the model into the workshop virtual coordinate system so that the X axis of the three-dimensional model coincides with the horizontal baseline of the plate, the Y axis of the three-dimensional model coincides with the vertical baseline of the plate, and the Z axis of the three-dimensional model coincides with the height auxiliary line;

[0009] Dividing the steel box girder segments into a plurality of construction nodes according to a construction sequence;

[0010] The steel box girder segments are constructed on the tire frame according to the grid lines. During the construction process, the three-dimensional coordinate data of each construction node of the steel box girder segment is measured in real time, and the actual three-dimensional coordinate data of each construction node of the steel box girder segment is compared with the three-dimensional coordinate data of the construction nodes of the steel box girder segment in the workshop virtual coordinate system to obtain a first deviation value;

[0011] Adjusting the actual size of the construction nodes of the steel box girder segments in real time according to the first deviation value, thereby gradually completing the construction of the steel box girder segments;

[0012] After the steel box girder segment is entirely constructed, measuring the three-dimensional coordinate data of the closing opening after the steel box girder segment is constructed, comparing the actual three-dimensional coordinate data of the closing opening with the three-dimensional coordinate data of the closing opening in the workshop virtual coordinate system, and obtaining a second deviation value;

[0013] constructing the next steel box girder segment according to the second deviation value, thereby completing the construction of multiple steel box girder segments;

[0014] The constructed sections of the steel box girder are folded together to obtain the complete steel box girder.

[0015] The steel box girder construction method provided by some embodiments of the present invention has at least the following beneficial effects: by setting grid lines in the workshop, a virtual coordinate system of the workshop is established, and three-dimensional models of each segment of the steel box girder are established by using software, and the three-dimensional models of the steel box girder segments are associated with the virtual coordinate system of the workshop to form a complete three-dimensional coordinate comparison system; in the process of constructing each segment of the steel box girder on the frame, the three-dimensional coordinate value of each construction node of the steel box girder can be measured, and the established three-dimensional coordinate comparison system can be used in the construction process to compare the actual three-dimensional coordinate data of the measured steel box girder segment with the three-dimensional coordinate data of the steel box girder segment in the virtual coordinate system of the workshop in real time to obtain the actually constructed steel box girder. The first deviation value of the segment and the steel box girder segment in the workshop virtual coordinate system is determined so that the steel box girder segment can be adjusted in real time during construction, thereby realizing comprehensive precision management and control of the size of the steel box girder segment, which can greatly improve the construction accuracy of a single steel box girder segment. After the construction of the steel box girder segment is completed, the actual three-dimensional coordinate data of the closing mouth is measured and compared with the three-dimensional coordinate data of the closing mouth of the steel box girder segment in the workshop virtual coordinate system to obtain a second deviation value, and the next steel box girder segment is constructed according to the second deviation value. After the construction of each segment of the steel box girder is completed, the constructed steel box girder segment can be closed. The entire construction process does not require reserved positions for pre-assembly, which is beneficial to improving the utilization rate of the workshop positions and improving production efficiency.

[0016] According to the steel box girder construction method provided by some embodiments of the present invention, during the construction of the steel box girder segment, the compensation amount for constructing the steel box girder segment is determined according to the first deviation value or the second deviation value.

[0017] According to the steel box girder construction method provided in some embodiments of the present invention, when constructing the steel box girder segments, abutment plates are provided at the closing openings of two adjacent segments.

[0018] According to the steel box girder construction method provided by some embodiments of the present invention, after the steel box girder segment is integrally constructed, a total station is used to measure the three-dimensional coordinate data of the closing opening after the steel box girder segment is constructed.

[0019] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Additional aspects and advantages of the present invention will become apparent and readily understood from the following description of embodiments with reference to the accompanying drawings, in which:

[0021] Figure 1 A flow chart of a method for constructing a steel box girder provided in some embodiments of the present invention; DETAILED DESCRIPTION

[0022] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0023] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0024] In the description of the present invention, if there is a description of first and second, it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0025] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0026] In the relevant technology, steel box girders are generally manufactured in sections and then welded into a whole due to their large volume and weight. During the manufacturing process of the steel box girder sections, in order to ensure the accuracy of the box girder, the steel box girder sections are required to be pre-assembled to avoid misalignment of the closing structure. However, during the construction process, in order to ensure the normal progress of the pre-assembly, a position needs to be reserved for hoisting in each round, resulting in a waste of position resources. In addition, the hoisting and pre-assembly process is also relatively complicated, which seriously affects the production progress.

[0027] To solve this problem, an embodiment of the present invention provides a method for constructing a steel box girder, which sets grid lines in a construction workshop, establishes a virtual coordinate system of the workshop, uses software to establish three-dimensional models of each segment of the steel box girder, and imports them into the virtual coordinate system of the workshop. During the construction process, the actual three-dimensional coordinate data of each segment of the steel box girder measured is compared with the three-dimensional coordinate data of the steel box girder segment in the virtual coordinate system of the workshop in real time to obtain a first deviation value and a second deviation value, thereby adjusting the steel box girder segment under construction according to the deviation value to complete the construction of the steel box girder segment. After the construction of each segment of the steel box girder is completed, the constructed steel box girder segment can be closed. The entire construction process does not require reserved positions for pre-assembly, which is beneficial to improving the utilization rate of the workshop positions and improving production efficiency. The specific structure and function of the steel box girder construction method provided by the embodiment of the present invention will be further explained in combination with text and drawings.

[0028] Reference Figure 1 According to some embodiments of the present invention, a steel box girder construction method is provided, wherein the steel box girder is welded from a plurality of segments, each of which has a closure. Each of the steel box girder segments includes a top plate unit, a web plate unit, an inclined plate unit, and a bottom plate unit. The top plate unit, the web plate unit, etc. are welded from a plurality of bridge plates, each of which has a transverse base line and a longitudinal base line. The steel box girder construction method includes:

[0029] S100: Set up grid lines on the bottom surface of the workshop, with the length direction of the grid lines coinciding with the horizontal base of the plate, and the width direction of the grid lines coinciding with the vertical base of the plate.

[0030] It should be noted that when dividing the grid lines, you can use methods such as a plumb bob.

[0031] S200: Manufacturing a tire frame and setting a height auxiliary line on the tire pile of the tire frame; when setting the height auxiliary line, a ruler and a level can be used to quickly divide it.

[0032] S300: Using the software, select the horizontal baseline, vertical baseline, and height auxiliary line of a bridge slab as three-axis references to establish a workshop virtual coordinate system;

[0033] S400: Using software to create a three-dimensional model of each segment of the steel box girder, and importing the model into a workshop virtual coordinate system, the three-dimensional model of the steel box girder segment is associated with the workshop virtual coordinate system, so that the X axis of the three-dimensional model of each segment of the steel box girder coincides with the horizontal baseline of the plate, the Y axis of the three-dimensional model coincides with the vertical baseline of the plate, and the Z axis of the three-dimensional model coincides with the height auxiliary line, thereby forming a complete three-dimensional coordinate comparison system;

[0034] S500: Divide the steel box girder segments into multiple construction nodes according to the construction sequence. The number of construction nodes can be set according to production requirements and is not specifically limited here.

[0035] S600: The steel box girder segments are constructed without margin according to the grid lines on the workshop cradle. During the construction process, the three-dimensional coordinate data of each construction node of the steel box girder segment is measured in real time. The actual three-dimensional coordinate data of each construction node of the steel box girder segment is compared with the three-dimensional coordinate data of the construction node of the steel box girder segment in the workshop virtual coordinate system, and a first deviation value is obtained.

[0036] S700: According to the first deviation value, actual sizes of construction nodes of the steel box girder segments are adjusted in real time by trimming or mortgaging, thereby gradually completing the construction of the steel box girder segments so that the constructed steel box girder segments meet the design requirements;

[0037] S800: After the steel box girder segments are constructed as a whole, measuring the three-dimensional coordinate data of the closing mouth of the steel box girder segments after the construction is completed, comparing the actual three-dimensional coordinate data of the closing mouth with the three-dimensional coordinate data of the closing mouth in the workshop virtual coordinate system, and obtaining a second deviation value;

[0038] S900: constructing the next steel box girder segment according to the second deviation value. During the construction process, the three-dimensional coordinate data of the construction nodes are repeatedly measured and compared, thereby completing the construction of multiple steel box girder segments.

[0039] S1000: The constructed steel box girder segments are put together to obtain a complete steel box girder.

[0040] According to the steel box girder construction method provided by some embodiments of the present invention, grid lines are set in the workshop to establish a virtual coordinate system of the workshop, and three-dimensional models of each segment of the steel box girder are established by using software, and the three-dimensional models of the segments of the steel box girder are associated with the virtual coordinate system of the workshop to form a complete three-dimensional coordinate comparison system; in the process of constructing each segment of the steel box girder on the frame, the three-dimensional coordinate value of each construction node of the steel box girder can be measured, and the established three-dimensional coordinate comparison system can be used in the construction process to compare the actual three-dimensional coordinate data of the measured steel box girder segment with the three-dimensional coordinate data of the steel box girder segment in the virtual coordinate system of the workshop in real time, and the actual constructed steel box girder segment and the steel box girder segment can be obtained. The first deviation value of the beam segment in the workshop virtual coordinate system is used to adjust the steel box beam segment in real time during construction, thereby realizing comprehensive precision management and control of the size of the steel box beam segment, which can greatly improve the construction accuracy of a single steel box beam segment. After the construction of the steel box beam segment is completed, the actual three-dimensional coordinate data of the closing mouth is measured and compared with the three-dimensional coordinate data of the closing mouth of the steel box beam segment in the workshop virtual coordinate system to obtain the second deviation value, and the next steel box beam segment is constructed according to the second deviation value. After the construction of each section of the steel box beam is completed, the constructed steel box beam sections can be closed. The entire construction process does not require reserved positions for pre-assembly, which is beneficial to improving the utilization rate of the workshop positions and improving production efficiency.

[0041] According to the steel box girder construction method provided by some embodiments of the present invention, during the process of constructing the steel box girder segments, the compensation amount of each part of the steel box girder segment being constructed is determined based on the first deviation value or the second deviation value obtained by comparison, so that after the segment welding is completed, the overall accuracy meets the design requirements. For example, the compensation amount of each part of the steel box girder segment being constructed can be determined based on the first deviation value or the second deviation value.

[0042] It should be noted that during the construction process, the expansion and contraction amount of the steel box girder partition before welding is determined based on the collected three-dimensional coordinate data of the steel box girder segments, so that the accuracy requirements can be met after the steel box girder segments are welded.

[0043] According to the steel box girder construction method provided in some embodiments of the present invention, when constructing the steel box girder segments, abutment plates are set on the top plate units and the bottom plate units at the closing mouths of two adjacent segments. When the steel box girder segments are hoisted, the abutment plates of adjacent segments are abutted so that the closing mouth reaches a preset gap, which facilitates subsequent hoisting, closing and welding.

[0044] According to some embodiments of the present invention, a method for constructing a steel box girder provides a method for measuring the three-dimensional coordinates of the closure of the completed steel box girder segments using a total station after the segments are constructed. The total station is simple to use, and the measured data is accurate and reliable, reducing the need for rework and improving work efficiency.

[0045] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them. The present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A method for constructing a steel box girder, characterized in that: The steel box girder is welded by a plurality of sections, each section of the steel box girder has a closing mouth, and each section of the steel box girder is welded by a plurality of bridge plates, each bridge plate having a transverse base line and a longitudinal base line. The steel box girder construction method includes: Grid lines are set up in the workshop, wherein the length direction of the grid lines coincides with the horizontal baseline of the plate, and the width direction of the grid lines coincides with the vertical baseline of the plate; Make tire frames and set up height auxiliary lines; Establishing a workshop virtual coordinate system based on the plate horizontal baseline, the plate vertical baseline and the height auxiliary line; Using software to create a three-dimensional model of each segment of the steel box girder, and importing the model into the workshop virtual coordinate system so that the X axis of the three-dimensional model coincides with the horizontal baseline of the plate, the Y axis of the three-dimensional model coincides with the vertical baseline of the plate, and the Z axis of the three-dimensional model coincides with the height auxiliary line; Dividing the steel box girder segments into a plurality of construction nodes according to a construction sequence; The steel box girder segments are constructed on the tire frame according to the grid lines. During the construction process, the three-dimensional coordinate data of each construction node of the steel box girder segment is measured in real time, and the actual three-dimensional coordinate data of each construction node of the steel box girder segment is compared with the three-dimensional coordinate data of the construction nodes of the steel box girder segment in the workshop virtual coordinate system to obtain a first deviation value; Adjusting the actual size of the construction nodes of the steel box girder segments in real time according to the first deviation value, thereby gradually completing the construction of the steel box girder segments; After the steel box girder segment is entirely constructed, measuring the three-dimensional coordinate data of the closing opening after the steel box girder segment is constructed, comparing the actual three-dimensional coordinate data of the closing opening with the three-dimensional coordinate data of the closing opening in the workshop virtual coordinate system, and obtaining a second deviation value; constructing the next steel box girder segment according to the second deviation value, thereby completing the construction of multiple steel box girder segments; The constructed sections of the steel box girder are folded together to obtain the complete steel box girder.

2. The method for constructing a steel box girder according to claim 1, wherein: During the process of constructing the steel box girder segment, a compensation amount for constructing the steel box girder segment is determined according to the first deviation value or the second deviation value.

3. The method for constructing a steel box girder according to claim 1, wherein: When constructing the sections of the steel box beam, abutment plates are provided at the closing openings of two adjacent sections.

4. The method for constructing a steel box girder according to claim 1, wherein: After the overall construction of the steel box girder segment is completed, a total station is used to measure the three-dimensional coordinate data of the closing opening after the steel box girder segment is completed.

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