Transverse multi-cell steel beam construction method

Abstract

The application provides a transverse multi-box chamber steel beam construction method, and belongs to the technical field of steel beam installation, and comprises the following steps: a plurality of steel beam segments are spliced into a pre-assembled steel beam; the plurality of steel beam segments are labeled and target papers are pasted; a reference point A is established outside the pre-assembled steel beam, a plurality of three-dimensional laser scanners are erected, the initial coordinate data of each target paper is determined with the reference point A as a reference, and a pre-assembled steel beam posture model is established; the pre-assembled steel beam posture model is compared with a preset steel beam posture model, a target posture model is obtained, and target coordinate data is determined; a plurality of three-dimensional laser scanners are erected on the periphery of a bridge support, a reference point A1 in the field is determined, the field coordinate data is compared with the target coordinate data, the position of the No. 1 steel beam segment is adjusted, and the field coordinate data is matched with the target coordinate data until the field coordinate data is matched with the target coordinate data. The transverse multi-box chamber steel beam construction method provided by the application is simple to operate, and can effectively improve the positioning accuracy of the steel beam segments.

Description

Technical Field

[0001] This invention belongs to the field of steel beam installation technology, and more specifically, relates to a construction method for transverse multi-compartment steel beams. Background Technology

[0002] The rapid pace of urbanization and the continuous improvement of economic levels have promoted the development of multi-cell steel structure bridges. Existing steel beams typically consist of multiple piers spaced apart along the erection direction, cap beams supported on the piers, and multiple steel beam segments installed on the piers.

[0003] When installing steel beam segments, it is often necessary to position each segment of the steel beam to ensure uniform stress and structural stability throughout the bridge. In the existing technology, the steel beam segments need to be hoisted onto the auxiliary positioning device first, and then placed on the pier. This increases the installation and transition process of the auxiliary positioning device, making the operation complicated. Moreover, the actual installation accuracy is limited by the positioning accuracy of the positioning device. Summary of the Invention

[0004] The purpose of this invention is to provide a construction method for transverse multi-compartment steel beams, which aims to solve the technical problems of complex operation and limited or inaccurate positioning in the existing steel beam segment installation process.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is: to provide a construction method for transverse multi-box steel beams, comprising the following steps:

[0006] S1. Establish a steel beam attitude control system, and establish a preset steel beam attitude model in the steel beam attitude control system;

[0007] S2. In the prefabrication site, multiple steel beam segments are arranged in an array and assembled into a pre-assembled steel beam; the multiple steel beam segments are numbered, and target paper is affixed to the top of each steel beam segment;

[0008] S3. Establish a reference point A outside the pre-assembled steel beam; set up multiple three-dimensional laser scanners around the pre-assembled steel beam, and make the three-dimensional laser scanners scan the target paper on each steel beam segment, and determine the initial coordinate data of each target paper with reference point A as the reference.

[0009] S4. Input the initial coordinate data of each of the target papers into the steel beam attitude control system to obtain the pre-assembled steel beam attitude model; compare the pre-assembled steel beam attitude model with the preset steel beam attitude model, and obtain the target attitude model to determine the target coordinate data of each of the steel beam segments;

[0010] S5. Transport each steel beam segment to the construction site using a transportation device; erect a bridge support structure at the construction site; install multiple three-dimensional laser scanners around the bridge support structure to determine the reference point A1 on site, and ensure that the reference point A1 matches the position of the reference point A in the steel beam attitude control system.

[0011] S6. Use hoisting tools to hoist the steel beam segment No. 1 onto the bridge support;

[0012] S7. Scan the target paper on the top of the steel beam segment using the three-dimensional laser scanner and obtain the on-site coordinate data of the steel beam segment. Compare the on-site coordinate data with the target coordinate data and adjust the position of the No. 1 steel beam segment until the on-site coordinate data matches the target coordinate data.

[0013] S8. Use hoisting tools to hoist the next steel beam segment onto the bridge support; and leave adjustment space between the next steel beam segment and the already installed steel beam segment;

[0014] S9. Repeat steps S7-S8 until all the steel beam segments are installed; fix the multiple installed steel beam segments to form a whole steel beam.

[0015] In one possible implementation, assembling multiple steel beam segments into a pre-assembled steel beam in step S2 includes the following steps:

[0016] S21. Erect the support frame according to the aerial alignment of the transverse multi-box steel beam;

[0017] S22. First, assemble the bottom plates of each box girder segment on the jig, and using the bottom plate as a reference, weld the mutually perpendicular web plates and diaphragms in sequence, so that the web plates and diaphragms extend through the bottom plate respectively; cover the bottom plate one by one with the top plate, and weld the top plate, web plate and diaphragm accordingly.

[0018] In one possible implementation, numbering the plurality of steel beam segments in step S2 includes the following steps:

[0019] S23. Define the steel beam segment placed at one end of the middle row of the pre-assembled steel beam as steel beam segment No. 1;

[0020] S24. Make the steel beam segment in the middle column that is sequentially adjacent to the steel beam segment with number 1 the next number of the steel beam segment, until the steel beam segment numbering in the middle column is completed;

[0021] S25. Number the steel beam segments in one column adjacent to the middle column sequentially, then number the steel beam segments in the other column sequentially, and so on, to gradually realize the step of numbering the pre-assembled steel beams sequentially from the middle column to both sides.

[0022] For example, the reference point A is located on the axis of the steel beam segment in the middle column and is close to the steel beam segment No. 1.

[0023] In some embodiments, in step S3, four three-dimensional laser scanners are installed around the pre-assembled steel beam, and the four three-dimensional laser scanners are located at the four corners of the pre-assembled steel beam.

[0024] In step S5, four 3D laser scanners are also installed around the bridge support, and the four 3D laser scanners are located at the four corners of the bridge support.

[0025] In one possible implementation, erecting bridge supports at the construction site includes the following steps:

[0026] Clean the mounting surface on the cap beam and determine the support position on the cap beam; set multiple temporary supports at intervals between two adjacent cap beams and set the temporary supports vertically on the ground.

[0027] In some embodiments, the process of hoisting any segment of the steel beam onto the bridge support includes the following steps:

[0028] S61. Multiple three-dimensional walking jacks are installed at the installation position of the bridge support;

[0029] S62. A set of steel pads is set on one side of each of the three-dimensional walking jacks;

[0030] S63. The steel beam segment to be installed is hoisted onto the three-dimensional walking jack and the steel pad;

[0031] S64. Increase or decrease the number of thin steel plates on the steel support block to adjust the elevation of the steel support block.

[0032] For example, after each steel beam segment is hoisted, the position of the steel pad remains unchanged, and the three-dimensional walking jack is lowered so that it can be reused when installing the next steel beam segment.

[0033] In some embodiments, the construction method for transverse multi-compartment steel beams further includes the following steps:

[0034] S10. Support the three-dimensional walking jack between the steel beam and the cap beam, and remove the steel pad and the temporary support;

[0035] S11. Lower the three-dimensional walking jack to place the steel beam as a whole on the support.

[0036] For example, the steel beam attitude control system is connected to each of the three-dimensional walking jacks to adjust the lifting height of each of the three-dimensional walking jacks.

[0037] Compared with the prior art, the solution shown in this application can determine the initial coordinate data of each steel beam segment of the pre-assembled steel beam by scanning the target paper with a 3D laser scanner and setting the reference point A. Furthermore, by comparing the pre-assembled steel beam posture model established using the initial coordinate data with the preset steel beam posture model in the steel beam posture control system, the target coordinate data of each steel beam segment is determined. This allows for accurate positioning of the steel beam segments during on-site installation by comparing the target coordinate data with the on-site coordinate data using the 3D laser scanner and reference point A1, thereby improving the accuracy and stability of the steel beam segment installation. In addition, by pre-assembling and labeling the steel beam segments at the prefabrication site, the application allows for direct installation and position adjustment at the construction site, simplifying the operation steps and effectively improving the installation efficiency of the steel beam segments. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0039] Figure 1 This is a top view of the pre-assembled steel beam provided in an embodiment of the present invention;

[0040] Figure 2 This is a side view of the pre-assembled steel beam provided in an embodiment of the present invention;

[0041] Figure 3 This is a schematic diagram of the main structure of the pre-assembled steel beam provided in an embodiment of the present invention;

[0042] Figure 4 This is a three-dimensional structural diagram of a pre-assembled steel beam provided in an embodiment of the present invention;

[0043] Figure 5 This is a schematic diagram showing the positional structure of the pre-assembled steel beam and the three-dimensional laser scanner used in an embodiment of the present invention;

[0044] Figure 6 This is a top view of the structure during the installation of steel beam segment No. 1 as used in an embodiment of the present invention.

[0045] Figure 7 This is a top view of the structure of the No. 1 steel beam segment after installation, as used in this embodiment of the invention.

[0046] Figure 8 This is a schematic diagram of the main view structure during the installation of steel beam segment No. 1 used in an embodiment of the present invention;

[0047] Figure 9 This is a top view of the structure during the installation of steel beam segment No. 2 as used in an embodiment of the present invention;

[0048] Figure 10 This is a schematic diagram of the main structure during the installation of steel beam segment No. 2 in an embodiment of the present invention;

[0049] Figure 11 This is a schematic diagram of the structure of the steel beam after its overall installation is completed, as provided in an embodiment of the present invention.

[0050] In the picture:

[0051] 1. Steel beam segment; 11. Bottom plate; 12. Web plate; 13. Diaphragm; 14. Top plate; 141. Target paper;

[0052] 2. Tire frame;

[0053] 3. Reference point A;

[0054] 4. 3D laser scanner;

[0055] 5. Bridge support; 51. Bridge pier; 52. Bridge cap beam; 53. Bridge bearing; 54. Temporary support;

[0056] 6. Reference point A1;

[0057] 7. Three-dimensional walking jack;

[0058] 8. Steel bearing blocks;

[0059] 9. Segment division lines of steel beams. Detailed Implementation

[0060] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0061] It should be noted that when an element is referred to as being "set on" another element, it can be directly on or indirectly on that other element. It should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention.

[0062] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a number" means two or more, unless otherwise explicitly specified.

[0063] For ease of understanding, the accompanying drawings in this application use dashed lines to represent the segment lines 9 of the steel beams, with different steel beam segments 1 on either side of the segment lines 9.

[0064] Please refer to the following: Figures 1 to 11 The construction method for transverse multi-box steel beams provided by this invention will now be described. The construction method for transverse multi-box steel beams includes the following steps:

[0065] S1. Establish a steel beam attitude control system, and establish a preset steel beam attitude model in the steel beam attitude control system;

[0066] S2. In the prefabrication site, multiple steel beam segments 1 are arranged in an array and assembled into a pre-assembled steel beam; the multiple steel beam segments 1 are numbered, and target paper 141 is affixed to the top of each steel beam segment 1;

[0067] S3. Establish benchmark point A3 outside the pre-assembled steel beam; set up multiple three-dimensional laser scanners 4 around the pre-assembled steel beam, and make the three-dimensional laser scanners 4 scan the target paper 141 on each steel beam segment 1, and determine the initial coordinate data of each target paper 141 based on benchmark point A3.

[0068] S4. Input the initial coordinate data of each target paper 141 into the steel beam attitude control system to obtain the pre-assembled steel beam attitude model; compare the pre-assembled steel beam attitude model with the preset steel beam attitude model, and obtain the target attitude model to determine the target coordinate data of each steel beam segment 1;

[0069] S5. Transport each steel beam segment 1 to the construction site using a transportation device; erect a bridge support 5 at the construction site; set up multiple three-dimensional laser scanners 4 around the bridge support 5 to determine the reference point A16 on site, and make the reference point A16 match the position of the reference point A3 in the steel beam attitude control system.

[0070] S6. Use hoisting tools to hoist steel beam segment 1 onto bridge support 5;

[0071] S7. Scan the target paper 141 on the top of the steel beam segment 1 using the 3D laser scanner 4, and obtain the on-site coordinate data of the steel beam segment 1. Compare the on-site coordinate data with the target coordinate data, and adjust the position of steel beam segment 1 until the on-site coordinate data matches the target coordinate data.

[0072] S8. Use hoisting tools to hoist the next steel beam segment 1 onto the bridge support 5; and leave adjustment space between the next steel beam segment 1 and the already installed steel beam segment 1;

[0073] S9. Repeat steps S7-S8 until all steel beam segments 1 are installed; fix the multiple installed steel beam segments 1 to form a whole steel beam.

[0074] Specifically, please refer to Figure 9 and Figure 10 When installing steel beam segment 1 of No. 2, firstly, steel beam segment 1 of No. 2 is hoisted onto bridge support 5 using hoisting tools; and adjustment space is reserved between steel beam segment 1 of No. 2 and steel beam segment 1 of No. 1; then, the target paper 141 on the top of steel beam segment 1 is scanned by a 3D laser scanner 4 to obtain the on-site coordinate data of steel beam segment 1 of No. 2. The on-site coordinate data of steel beam segment 1 of No. 2 is compared with its target coordinate data, and the position of steel beam segment 1 of No. 2 is adjusted until the on-site coordinate data matches the target coordinate data; then steel beam segment 1 of No. 3, steel beam segment 1 of No. 4, and so on, until all steel beam segments 1 of No. 1 are installed.

[0075] It should be understood that the steel beam attitude control system used in this application includes a software system for model building and a computer hardware device connected to the software system. This steel beam attitude control system can build a pre-assembled steel beam attitude model through initial coordinate data and compare the pre-assembled steel beam attitude model with the preset steel beam attitude model. Similarly, this steel beam attitude control system can also compare and analyze the on-site coordinate data with the target coordinate data on-site in order to adjust the position of the steel connecting segment in the horizontal direction. That is, the software can perform information processing for the entire hoisting process and adjust the attitude of steel beam segment 1. The internal program and working principle of the software system, as well as the connection method with the computer hardware device, are all prior art and will not be described in detail here.

[0076] Optionally, six target papers 141 are affixed to the top of each steel beam segment 1 and symmetrically distributed at both ends of the steel beam segment 1 to accurately locate the position of each steel beam segment 1.

[0077] It is important to understand that the elevation and spatial position of the benchmark point A3 are consistent, and the initial coordinate data of each steel beam segment 1 can be determined based on the coordinates of the benchmark point A3.

[0078] The transverse multi-compartment steel beam construction method provided by this invention, compared with the prior art, can determine the initial coordinate data of each steel beam segment 1 of the pre-assembled steel beam by scanning the target paper 141 with a three-dimensional laser scanner 4 and setting the reference point A3; and by comparing the pre-assembled steel beam posture model established with the preset steel beam posture model in the steel beam posture control system, the target coordinate data of each steel beam segment 1 can be determined. So that during on-site installation, the target coordinate data can be compared with the on-site coordinate data with the three-dimensional laser scanner 4 and the reference point A16, thereby accurately locating the position of the steel beam segment 1 and improving the accuracy and stability of the installation of the steel beam segment 1. In addition, by pre-assembling and labeling the steel beam segment 1 in the prefabrication site, the steel beam segment 1 can be directly installed and its position adjusted on the construction site, which can simplify the operation steps and effectively improve the installation efficiency of the steel beam segment 1.

[0079] It should be noted that the appendix in this application Figure 7 The dashed line shows the state of steel beam segment 1 before adjustment by the 3D laser scanner 4, and the solid line shows the state of steel beam segment 1 after adjustment by the 3D laser scanner 4; in the appendix Figure 8 The dashed line shows the state of steel beam segment 1 before adjustment by the three-dimensional walking jack 7, and the solid line shows the state of steel beam segment 1 after adjustment by the three-dimensional walking jack 7; in the appendix Figure 10 The image shows the state of steel beam segment 1 before it was adjusted by the 3D laser scanner 4, and uses solid lines to show the state of steel beam segment 1 after it was adjusted by the 3D laser scanner 4.

[0080] Please refer to the following: Figures 1 to 3 In some possible embodiments, in step S2, assembling multiple steel beam segments 1 into a pre-assembled steel beam includes the following steps:

[0081] S21. Erect the frame 2 according to the aerial alignment of the transverse multi-box steel beam;

[0082] S22. First, assemble the bottom plate 11 of each box girder segment on the jig 2, and then weld the mutually perpendicular web plate 12 and transverse diaphragm 13 in sequence with the bottom plate 11 as the reference, and make the web plate 12 and transverse diaphragm 13 extend through the bottom plate 11 respectively; cover the bottom plate 11 one by one with the top plate 14, and weld the top plate 14, web plate 12, and transverse diaphragm 13 accordingly.

[0083] Specifically, the plate units of the base plate 11 are assembled on the jig 2 and welded as required; then, using the base plate 11 as a reference, the web plate 12 is precisely aligned with the base plate 11, and the web plate 12 is welded to the base plate 11 to complete the assembly of the web plate 12; then, the transverse diaphragm 13 is precisely aligned with the base plate 11, and the transverse diaphragm 13 is welded to the base plate 11 to complete the assembly of the transverse diaphragm 13; after precisely aligning the top plate 14 with the web plate 12 and the transverse diaphragm 13, the top plate 14 is welded to the transverse diaphragm 13 and the web plate 12 to complete the assembly of the steel beam segment 1.

[0084] Please refer to the following: Figure 1 or Figure 4 In some possible embodiments, labeling the plurality of steel beam segments 1 in step S2 includes the following steps:

[0085] S23. Define steel beam segment 1, which is placed at one end of the middle row of the pre-assembled steel beam, as steel beam segment 1.

[0086] S24. Make the steel beam segment 1 that is in the middle column and sequentially adjacent to steel beam segment 1 of number 1 the next sequence number of steel beam segment 1, until the steel beam segment 1 of the middle column is numbered;

[0087] S25. Number the steel beam segments 1 in one of the columns adjacent to the middle column, then number the steel beam segments 1 in the other column, and so on, to gradually realize the step of numbering the pre-assembled steel beams in order from the middle column to both sides.

[0088] By first positioning the steel beam segment 1 at one end of the middle column as steel beam segment 1, a reference point A3 can be selected on the axis of the middle column. This makes it convenient to install steel beam segment 1 first at a position close to the reference point A16, and then install the subsequent steel beam segments 1 in sequence with steel beam segment 1 as a reference.

[0089] Furthermore, by first installing the middle steel beam segment 1 into place, and then sequentially installing the outer steel beam segments 1 from the inside out, the overall alignment of the final steel beam is ensured, thereby improving the overall stability of the steel beam.

[0090] Please see Figure 5 For example, reference point A3 is located on the axis of steel beam segment 1 in the middle column and is close to steel beam segment 1.

[0091] By setting the reference point A3 on the axis of the middle column of steel beam segment 1, the alignment of both sides of the steel beam is ensured, and the overall stability of the steel beam is improved. The reference point A3 is placed close to steel beam segment 1 so that steel beam segment 1 can be installed first, thus providing a reference for the installation of subsequent steel beam segments 1.

[0092] Please refer to the following: Figure 5 and Figure 6 In some embodiments, in step S3, four three-dimensional laser scanners 4 are installed around the pre-assembled steel beam, and the four three-dimensional laser scanners 4 are located at the four corners of the pre-assembled steel beam.

[0093] In step S5, four 3D laser scanners 4 are also installed around the bridge support 5, and the four 3D laser scanners 4 are located at the four corners of the bridge support 5.

[0094] By setting up four 3D laser scanners 4 around the pre-assembled steel beam, the scanning area of ​​the four 3D laser scanners 4 completely covers the pre-assembled steel beam, thereby accurately locating the position of each target paper 141; and by also setting up four corresponding 3D laser scanners 4 in step S5, the scanning range of the 3D laser scanners 4 is consistent with the scanning range in step S3; and it is convenient to ensure that the relative position of the reference point A16 and the 3D laser scanner 4 in step S5 is the same as the relative position of the reference point A3 and the 3D laser scanner 4 in step S3, thereby ensuring the positioning accuracy of the steel beam segment 1.

[0095] Please refer to the following: Figure 7 and Figure 8 In some possible embodiments, erecting bridge support 5 at the construction site includes the following steps:

[0096] Clean the mounting surface on the cap beam 52 and determine the position of the support 53 on the cap beam 52; set up multiple temporary supports 54 at intervals between two adjacent cap beams 52 and set the temporary supports 54 vertically on the ground.

[0097] Temporary supports 54 are provided to support the steel beam segment 1 on the cap beam 52 of the pier 51 and the temporary supports 54, or the steel beam segment 1 can be supported on two adjacent temporary supports 54.

[0098] It should be noted that a cap beam 52 for supporting steel beam segment 1 is provided on the pier 51. The cap beam 52 is provided with a support 53 for installing the corresponding steel beam segment 1. The structure and working principle of the cap beam 52 and the support 53 are existing technologies and will not be described in detail here.

[0099] Please refer to the following: Figure 8 and Figure 10In some embodiments, the following steps are included when hoisting any segment of the steel beam 1 onto the bridge support 5:

[0100] S61. Multiple three-dimensional walking jacks 7 are erected at the installation position of the bridge support 5;

[0101] S62. A set of steel pads 8 are set on one side of each three-dimensional walking jack 7;

[0102] S63. Hoist the steel beam segment 1 to be installed onto the three-dimensional walking jack 7 and the steel pad 8;

[0103] S64. Adjust the elevation of the steel pier 8 by increasing or decreasing the number of thin steel plates on the steel pier 8.

[0104] By setting up a three-dimensional walking jack 7 and a steel pad 8 to support the corresponding steel beam segment 1, and by setting up a thin steel plate to adjust the height of the corresponding steel pad 8, the steel pad 8 supports the bottom of the steel beam segment 1 when the three-dimensional walking jack 7 adjusts the height of the steel beam segment 1 to a suitable position.

[0105] Please refer to the following: Figure 8 and Figure 10 For example, after each steel beam segment 1 is hoisted, the position of the steel pad 8 is kept unchanged, and the three-dimensional walking jack 7 is lowered so that it can be reused when installing the next steel beam segment 1.

[0106] To improve the utilization rate of the three-dimensional walking jack 7 and save construction costs, the three-dimensional walking jack 7 can be recycled multiple times; and the aforementioned steel pad 8 and thin steel plate can effectively stop and support the bottom of the steel beam segment 1. Therefore, the three-dimensional walking jack 7 can be disassembled and recycled at this time.

[0107] Please see Figure 11 In some embodiments, the construction method for transverse multi-compartment steel beams further includes the following steps:

[0108] S10. Support the three-dimensional walking jack 7 between the steel beam and the cap beam 52, and remove the steel pad 8 and temporary support 54.

[0109] S11. Lower the three-dimensional walking jack 7 to place the steel beam onto the support 53.

[0110] After the individual steel beam segments 1 are welded into a whole steel beam, the steel pads 8 at the bottom of each steel beam segment 1 can be replaced by the support of the three-dimensional walking jack 7. Thus, by controlling the lifting and lowering of the three-dimensional walking jack 7, the overall lowering and placement of the steel beam can be achieved.

[0111] For example, the steel beam attitude control system is connected to each of the three-dimensional walking jacks 7 to adjust the lifting height of each of the three-dimensional walking jacks 7.

[0112] By connecting the steel beam attitude control system to each three-dimensional walking jack 7, the lifting stiffness of the corresponding three-dimensional walking jack 7 can be adjusted through the steel beam attitude control system, thereby adjusting the overall height position of the steel beam to achieve accurate height positioning.

[0113] Furthermore, fixing the multiple installed steel beam segments 1 in step S9 includes the following steps:

[0114] S91. Fix the beam sections of multiple steel beam segments 1 by spot welding;

[0115] S92. Weld each adjacent steel beam segment 1 as a whole according to the preset requirements.

[0116] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method of construction of a transverse multi-cell steel beam, characterised in that, Includes the following steps: S1. Establish a steel beam attitude control system, and establish a preset steel beam attitude model in the steel beam attitude control system; S2. In the prefabrication site, multiple steel beam segments are arrayed and assembled into a pre-assembled steel beam; the multiple steel beam segments are labeled, and target paper is affixed to the top of each steel beam segment; wherein, assembling multiple steel beam segments into a pre-assembled steel beam includes the following steps: S21. Erect the support frame according to the aerial alignment of the transverse multi-box steel beam; S22. First, assemble the bottom plates of each steel beam segment on the jig, and using the bottom plate as a reference, weld the mutually perpendicular web plates and transverse diaphragms in sequence, so that the web plates and transverse diaphragms extend through the bottom plate respectively; cover the bottom plate one by one with the top plate, and weld the top plate, web plate, and transverse diaphragm accordingly; S3. Establish a reference point A outside the pre-assembled steel beam; set up multiple three-dimensional laser scanners around the pre-assembled steel beam, and make the three-dimensional laser scanners scan the target paper on each steel beam segment, and determine the initial coordinate data of each target paper with reference point A as the reference. S4. Input the initial coordinate data of each of the target papers into the steel beam attitude control system to obtain the pre-assembled steel beam attitude model; compare the pre-assembled steel beam attitude model with the preset steel beam attitude model, and obtain the target attitude model to determine the target coordinate data of each of the steel beam segments; S5. Transport each steel beam segment to the construction site using a transportation device; erect a bridge support structure at the construction site; install multiple three-dimensional laser scanners around the bridge support structure to determine the reference point A1 on site, and ensure that the reference point A1 matches the position of the reference point A in the steel beam attitude control system. S6. Use hoisting tools to hoist the steel beam segment No. 1 onto the bridge support; S7. Scan the target paper on the top of the steel beam segment using the three-dimensional laser scanner and obtain the on-site coordinate data of the steel beam segment. Compare the on-site coordinate data with the target coordinate data and adjust the position of the No. 1 steel beam segment until the on-site coordinate data matches the target coordinate data. S8. Use hoisting tools to hoist the next steel beam segment onto the bridge support; and leave adjustment space between the next steel beam segment and the already installed steel beam segment; S9. Repeat steps S7-S8 until all the steel beam segments are installed; fix the multiple installed steel beam segments to form a whole steel beam.

2. The construction method for transverse multi-box steel beams as described in claim 1, characterized in that, In step S2, labeling the multiple steel beam segments includes the following steps: S23. Define the steel beam segment placed at one end of the middle row of the pre-assembled steel beam as steel beam segment No. 1; S24. Make the steel beam segment in the middle column that is sequentially adjacent to the steel beam segment with number 1 the next number of the steel beam segment, until the steel beam segment numbering in the middle column is completed; S25. Number the steel beam segments in one column adjacent to the middle column sequentially, then number the steel beam segments in the other column sequentially, and so on, to gradually realize the step of numbering the pre-assembled steel beams sequentially from the middle column to both sides.

3. The construction method for transverse multi-box steel beams as described in claim 2, characterized in that, The reference point A is located on the axis of the steel beam segment in the middle column and is close to the No. 1 steel beam segment.

4. The construction method for transverse multi-box steel beams as described in claim 3, characterized in that, In step S3, four three-dimensional laser scanners are installed around the pre-assembled steel beam, and the four three-dimensional laser scanners are located at the four corners of the pre-assembled steel beam. In step S5, four 3D laser scanners are also installed around the bridge support, and the four 3D laser scanners are located at the four corners of the bridge support.

5. The construction method for transverse multi-compartment steel beams as described in claim 1, characterized in that, The bridge scaffolding erection at the construction site includes the following steps: Clean the mounting surface on the cap beam and determine the support position on the cap beam; set multiple temporary supports at intervals between two adjacent cap beams and set the temporary supports vertically on the ground.

6. The construction method for transverse multi-box steel beams as described in claim 5, characterized in that, The following steps are included when hoisting any segment of the steel beam onto the bridge support: S61. Multiple three-dimensional walking jacks are installed at the installation position of the bridge support; S62. A set of steel pads is set on one side of each of the three-dimensional walking jacks; S63. The steel beam segment to be installed is hoisted onto the three-dimensional walking jack and the steel pad; S64. Increase or decrease the number of thin steel plates on the steel support block to adjust the elevation of the steel support block.

7. The construction method for transverse multi-box steel beams as described in claim 6, characterized in that, After each steel beam segment is hoisted, the position of the steel support remains unchanged, and the three-dimensional walking jack is lowered so that it can be reused when installing the next steel beam segment.

8. The construction method for transverse multi-box steel beams as described in claim 7, characterized in that, The construction method for transverse multi-compartment steel beams also includes the following steps: S10. Support the three-dimensional walking jack between the steel beam and the cap beam, and remove the steel pad and the temporary support; S11. Lower the three-dimensional walking jack to place the steel beam as a whole on the support.

9. The construction method for transverse multi-box steel beams as described in claim 6, characterized in that, The steel beam attitude control system is connected to each of the three-dimensional walking jacks to adjust the lifting height of each of the three-dimensional walking jacks.

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