Assembly method for orthotropic steel bridge deck of all-welded steel truss girder

Abstract

The present invention discloses an assembly method for an orthotropic steel bridge deck of a fully welded steel truss girder, which relates to the technical field of bridge construction. The method includes the following steps: cross beams of the current bridge deck mother section with a set length are arranged at intervals along a set direction, bridge deck units are laid above the cross beams with the set length, and the ends of the bridge deck units are left suspended; cross beams with the length of the suspended part of the bridge deck units of the previous bridge deck mother section are arranged at intervals along the set direction, and cross beams of the next bridge deck mother section with the set length are continuously arranged. The bridge deck units of the previous bridge deck mother section are spliced with the cross beams at the suspended positions, and the next bridge deck units are laid on the cross beams of the next bridge deck mother section. This step is repeated until the installation of a bridge deck assembly section is completed. The transverse shrinkage generated during welding when adjacent bridge deck units are laid is adapted through the self-deformation of the end suspended sections to ensure the transverse position accuracy of the longitudinal ribs of the bridge deck.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge construction, and particularly relates to an assembly method for an orthotropic steel bridge deck of a fully welded steel truss girder. Background Art

[0002] The orthotropic steel bridge deck is a commonly used deck structure form for fully welded steel truss girder structures. At present, some steel truss girders adopt an upper and lower double-layer form, and the side edges between the upper and lower decks are connected by truss members. The deck units are laid on the T-shaped cross beams of the upper and lower decks. Since each part is manufactured separately during the manufacturing process, during on-site assembly, due to bolt connection, high precision requirements are imposed, so pre-assembly is essential after manufacturing is completed.

[0003] The steel bridge deck between steel truss girder segments is generally welded. There are mainly two connection forms for the longitudinal ribs of the deck: connection by welding of the filling section and connection by high-strength bolts. The connection by welding of the filling section can adapt to the transverse position error of the longitudinal ribs between segments, but the on-site welding of the filling section is overhead welding, with poor welding quality and poor structural fatigue performance. The connection by high-strength bolt splicing avoids on-site overhead welding and shortens the connection time, but has high requirements for the transverse position accuracy of the longitudinal ribs. When the longitudinal rib joint offset exceeds 1 mm, it should be trimmed or additional filler plates should be added according to the specifications, which will greatly increase the connection time and the amount of steel. During actual construction, forced installation with bolts is mostly used. According to finite element analysis, at this time, the stress of the longitudinal ribs and the splicing plates has exceeded the yield strength. There are also some construction parties. To eliminate the transverse position error of the longitudinal ribs, the welds of a certain length of the longitudinal ribs and the deck plate in the splicing area are not welded, and then welded after bolt connection. At this time, this section of the weld is also on-site overhead welding, with poor welding quality and is also not advisable. The deck directly bears the wheel load. Under the current background of widespread overloading and huge traffic flow, the fatigue performance requirements for the deck are getting higher and higher. It is very necessary to improve the transverse position accuracy of the longitudinal ribs and the fatigue resistance of the deck. Summary of the Invention

[0004] Aiming at the defects existing in the prior art, the purpose of the present invention is to provide an assembly method for an orthotropic steel bridge deck of a fully welded steel truss girder to solve the problems of low transverse position accuracy of longitudinal ribs and poor fatigue resistance of the deck in the prior art.

[0005] To achieve the above purpose, the technical solution adopted by the present invention is:

[0006] The present application provides an assembly method for an orthotropic steel bridge deck of a fully welded steel truss girder, including the following steps:

[0007] Set cross beams of the current deck mother section with a set length at intervals along a set direction, lay deck units above the cross beams of the set length, and make the ends of the deck units suspended;

[0008] Set crossbeams at intervals along the set direction with lengths corresponding to the lengths of the overhanging parts of the deck units of the previous deck panel mother segment, and continue to set crossbeams for the next deck panel mother segment with a set length. Splice the deck units of the previous deck panel mother segment to the crossbeams at the overhanging positions, and lay the next deck unit on the crossbeams of the next deck panel mother segment. Repeat this step until the installation of a bridge assembly segment is completed.

[0009] In some alternative embodiments, lay deck units above the crossbeams with the set length, including, after positioning the deck units and the crossbeams, welding the longitudinal butt welds between two adjacent deck units perpendicular to the set direction for the set length.

[0010] In some alternative embodiments, before setting crossbeams at intervals along the set direction for the current deck panel mother segment with a set length, install at least one deck panel segment along the set direction at a position far from the overhanging position, and connect the deck of the deck panel segment to the deck units of the current deck panel mother segment by longitudinal rib bolts. After the deck units are welded and fixed to the crossbeams, remove the longitudinal rib bolts.

[0011] In some alternative embodiments, after splicing the deck units of the previous deck panel mother segment to the crossbeams at the overhanging positions, weld the longitudinal butt welds at the overhanging ends of the deck units.

[0012] In some alternative embodiments, the deck units are perpendicular to the crossbeams and are installed from the middle to both sides in the transverse direction of the bridge.

[0013] In some alternative embodiments, the ratio of the set length to the length of the deck panel mother segment is 3:2.

[0014] In some alternative embodiments, after setting crossbeams at intervals along the set direction with lengths corresponding to the lengths of the overhanging parts of the deck units of the previous deck panel mother segment, continue to set at least one deck panel segment along the set direction, and then continue to set crossbeams for the next deck panel mother segment with a set length along the set direction.

[0015] In some alternative embodiments, connect the deck of the deck units of the previous deck panel mother segment to the deck of the deck panel segment by longitudinal rib bolts, and remove the longitudinal rib bolts after the deck units are welded to the crossbeams.

[0016] In some alternative embodiments, the longitudinal rib bolts are temporary bolts and are installed between two adjacent deck units in the set direction by using the permanent bolt holes on the longitudinal ribs of the deck units.

[0017] In some alternative embodiments, the crossbeams include a plurality of crossbeam block units connected in sequence.

[0018] Compared with the prior art, the advantages of the present invention are as follows: By laying the bridge deck units above the crossbeams of a set length and leaving the ends of the bridge deck units suspended, splicing the bridge deck units of the previous bridge deck segment with the crossbeams at the suspended positions, and laying the next bridge deck units on the crossbeams of the next bridge deck segment, the transverse shrinkage generated during welding when adjacent bridge deck units are laid is adapted by the self-deformation of the end suspended segments to accommodate the transverse shrinkage of the longitudinal ribs of the bridge deck units, so as to ensure the transverse position accuracy of the longitudinal ribs of the bridge deck and improve the anti-fatigue performance of the bridge deck. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0020] Figure 1 Schematic diagram of the cross-section of the bridge deck in the embodiment of the assembling method of a fully welded steel truss girder orthotropic steel bridge deck according to the present invention;

[0021] Figure 2 Schematic diagram of step S1 of the assembling method of a fully welded steel truss girder orthotropic steel bridge deck according to the present invention;

[0022] Figure 3 Schematic diagram of step S2 of the assembling method of a fully welded steel truss girder orthotropic steel bridge deck according to the present invention;

[0023] Figure 4 Schematic diagram of the structure of a fully welded steel truss girder segment of the assembling method of a fully welded steel truss girder orthotropic steel bridge deck according to the present invention.

[0024] In the figure: 1, bridge deck mother segment; 11, bridge deck unit; 12, crossbeam; 121, crossbeam block unit; 3, web member; 4, chord member; 5, bridge deck segment. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts fall within the scope of protection of the present application.

[0026] The following further elaborates on the embodiments of the present invention with reference to the accompanying drawings.

[0027] The present application provides an assembling method for an orthotropic steel bridge deck of a fully welded steel truss girder, including the following steps:

[0028] S1: As shown in Figure 1 and Figure 2 , crossbeams 12 of the current bridge deck mother segment with a set length are arranged at intervals along a set direction, a bridge deck unit 11 is laid above the crossbeams 12 of the set length, and the ends of the bridge deck unit 11 are left suspended.

[0029] It can be understood that the bridge deck unit 11 includes a top plate and longitudinal ribs located below the top plate. Before laying the bridge deck unit 11, it is necessary to process the bridge deck unit 11 first, and weld the top plate and the longitudinal ribs together to form a bridge deck unit 11. The top plate of each bridge deck unit 11 is a strip-shaped plate structure. When laying, the longitudinal ribs of the bridge deck unit 11 are positioned with the crossbeams 12, and the top plate is arranged perpendicular to the crossbeams 12. Since the crossbeams 12 are laid within a set length and the length of the bridge deck unit 11 along the set direction is greater than the set length, after the bridge deck unit 11 is laid on the crossbeams 12, there will be an end with a length of H left suspended, waiting for the next step of installation with the crossbeams 12.

[0030] In this example, the set direction is the longitudinal bridge direction, and the length direction of the crossbeams 12 is the transverse bridge direction. When assembling a bridge deck mother segment 1, multiple bridge deck units 11 are laid on the crossbeams 12 along the transverse bridge direction.

[0031] Preferably, the crossbeams 12 are positioned on an assembly jig to ensure that the adjacent two crossbeams 12 are spaced at a set distance. It can be understood that in some alternative embodiments, each crossbeam 12 is arranged at equal intervals, which is convenient for construction and balanced stress. Of course, the interval distances between multiple crossbeams 12 can also be unequal, and are specifically set according to the construction conditions. Whether the intervals between the crossbeams 12 are equal or not does not affect the implementation effect of the embodiments of the present application.

[0032] In some alternative embodiments, multiple crossbeam block units 121 are first positioned on an assembly jig, and the butt welds between the crossbeam block units 121 are welded to form the above-mentioned crossbeams 12. The length direction of the crossbeams 12 is perpendicular to the set direction.

[0033] In some alternative embodiments, the above step S1 includes:

[0034] S11: Install at least one bridge deck segment 5 at the end along the set direction.

[0035] It can be understood that the bridge deck segment 5 also includes multiple crossbeams and the bridge deck laid on the crossbeams. Optionally, the longitudinal bridge length of the bridge deck segment 5 is the same as the longitudinal bridge length of the bridge deck mother segment 1.

[0036] S12: Arrange cross beams 12 of the current bridge deck mother segment 1 with a set length at intervals along the set direction. Lay the bridge deck units 11 above the cross beams 12 of the set length, and make the end of the bridge deck unit 11 away from the bridge deck segment 5 hang in the air. Position the bridge deck unit 11 and the cross beam 12.

[0037] In some alternative embodiments, when positioning the bridge deck unit 11 above the cross beam 12, align the length direction of the bridge deck unit 11 with the set direction, and install and position the bridge deck unit 11 in the order from the middle of the cross beam 12 to both sides in the transverse direction of the bridge, so as to ensure the accuracy of the relative position between the bridge deck unit 11 and the cross beam 12.

[0038] It can be understood that a plurality of stiffening rib notches are uniformly arranged along the length direction on the cross beam 12, and the cross beam 12 and the bridge deck unit 11 are initially positioned through the notches.

[0039] S12: Connect the bridge deck units 11 of the bridge deck mother segment 1 and the bridge deck of the bridge deck segment 5 in the set direction through longitudinal rib bolts.

[0040] After the bridge deck unit 11 is positioned on the cross beam 12, connect the bridge deck units 11 of the bridge deck mother segment 1 and the bridge deck of the bridge deck segment 5 in the set direction through longitudinal rib bolts, so as to fix the relative positions of the adjacent bridge deck units 11 of the bridge deck mother segment 1 and the bridge deck segment 5 in the set direction.

[0041] S13: Weld the longitudinal welds of two adjacent bridge deck units 11 of the bridge deck mother segment 1 perpendicular to the set direction, and the welding length is the set length. Weld the longitudinal welds of two adjacent bridge deck units 11 of the bridge deck segment 5 perpendicular to the set direction, and the welding length is the length of this segment.

[0042] It can be understood that after a plurality of bridge deck units 11 on the bridge deck mother segment 1 are assembled together on the cross beam 12, the adjacent two bridge deck units 11 in the transverse direction of the bridge are connected and fixed by welding to form an integral body. Since when welding the longitudinal butt welds of two adjacent bridge deck units 11, the weld shrinkage and arrangement deviation will cause transverse displacement between the bridge deck units 11, thus when splicing the bridge deck units 11 of the next bridge deck mother segment 1 and the bridge deck units 11 of the previous bridge deck mother segment 1, there will be a problem of uneven splicing.

[0043] Therefore, weld the longitudinal butt welds of two adjacent bridge deck units 11 of the bridge deck mother segment 1 perpendicular to the set direction to the set length, and do not weld the longitudinal butt welds at the hanging ends of the bridge deck units 11, and adapt to the transverse displacement through the self-deformation of the non-welded section.

[0044] In some alternative embodiments, the ratio of the above-mentioned set length to the length of the mother section 1 of the bridge deck is 2:3.

[0045] It can be understood that the specific value of the set length needs to meet the requirements that it can ensure the connection reliability between the bridge deck units 11, so as to ensure the stability of the overall bridge deck segment 5 during hoisting. At the same time, there should be sufficient deformation between the bridge deck units 11 where the longitudinal butt welds are not welded within the set length range to accommodate the transverse shrinkage and installation deviation after welding. Those skilled in the art can make corresponding selections according to actual processing requirements to meet the above conditions.

[0046] S14: After the bridge deck units 11 of the mother section 1 of the bridge deck are welded and fixed to the cross beam 12, remove the above-mentioned longitudinal rib bolts.

[0047] After the bridge deck units 11 are welded and fixed to the cross beam, the relative positions between the bridge deck units 11 and the relative positions between the bridge deck units 11 and the cross beam 12 have been determined. At this time, the longitudinal rib bolts can be removed.

[0048] It can be seen that the longitudinal rib bolts are temporary bolts. They are installed between two longitudinally adjacent bridge deck units 11 using the permanent bolt holes of the longitudinal ribs of the bridge deck units 11 to initially fix the positions between the two adjacent bridge deck units 11 in the set direction, so that the bridge deck units 11 can be accurately connected when welding the longitudinal butt welds. After the bridge deck units 11 are welded and fixed to the cross beam 12, the longitudinal rib bolts are no longer needed to fix the relative positions between the bridge deck units 11 and can be removed.

[0049] S2: As Figure 3 shown, arrange the cross beams 12 at intervals along the set direction with the length of the suspended part of the bridge deck units 11 of the previous mother section 1 of the bridge deck, and continue to arrange the cross beams 12 of the next mother section 1 of the set length. Position the bridge deck units 11 of the previous mother section 1 of the bridge deck with the cross beams 12 at the suspended positions, and lay the next bridge deck unit 11 on the cross beams 12 of the next mother section 1 of the bridge deck. Repeat this step until the installation of a bridge assembly segment is completed.

[0050] In some alternative embodiments, the above step S2 includes:

[0051] S21: Arrange the cross beams 12 at intervals along the set length direction on the assembly jig with the length of the suspended part of the bridge deck units 11 of the previous mother section 1 of the bridge deck, and continue to arrange the cross beams 12 of the next mother section 1 of the set length.

[0052] It can be understood that the length of the suspended part is H. In some alternative embodiments, the ratio of H to the set length is 1:3.

[0053] S22: Hoist the previous mother section 1 of the bridge deck onto the cross beams 12 at the length of the suspended part.

[0054] S23: Position the deck unit 11 of the previous deck panel mother segment 1 and the cross beam 12 at the suspended position.

[0055] In some alternative embodiments, after step S23, at least one deck panel segment 5 is arranged at the suspended position along a set direction, and then the cross beam 12 of the next deck panel mother segment 1 with a set length is continuously arranged along the set direction.

[0056] It can be understood that the deck unit 11 of the previous deck panel mother segment 1 and the deck panels of the adjacent deck panel segments 5 are temporarily connected and fixed by longitudinal rib bolts. After the longitudinal butt welds between the multiple deck units 11 in the transverse direction of the suspension and the welding between the deck unit 11 and the cross beam 12 are completed, the longitudinal rib bolts are removed. That is to say, a deck panel segment 5 can also be added between two adjacent deck panel mother segments 1. At this time, the deck unit 11 of the previous deck panel mother segment 1 and the deck unit 11 of the next deck panel mother segment 1 are connected through the deck panel of the deck panel segment 5.

[0057] Preferably, the length of each of the above-mentioned deck panel segments 5 is the same as the length of one deck panel mother segment 1. That is to say, after installing one deck panel mother segment 1, at least one deck panel segment 5 can be arranged at the above-mentioned end along the above-mentioned set direction. Each deck panel segment 5 includes the already installed deck unit and cross beam. The deck panel mother segment 1 and the deck panel segment 5 are connected by longitudinal rib bolts to align the deck panel ends of the deck unit 11 of the deck panel mother segment 1.

[0058] In this example, as Figure 3 shown, it is a deck panel assembly segment including four deck panel segments 5.

[0059] In other embodiments, the number of deck panel segments 5 in each deck panel assembly segment can be set according to the specific requirements during processing. The purpose of setting multiple deck panel segments 5 is to reduce the steps of each round of construction and improve the construction efficiency.

[0060] S24: Position the deck unit 11 on the cross beam 12 with a set length of the next deck panel mother segment 1, and make the end of the deck unit 11 suspended. Connect the deck unit 11 of the previous deck panel mother segment 1 and the deck unit 11 of the next deck panel mother segment 1 by longitudinal rib bolts.

[0061] S25: Weld the longitudinal butt welds between the deck units 11 at the suspended part of the deck unit 11 of the previous deck panel mother segment 1, and the longitudinal butt welds between the deck units 11 of the next deck panel mother segment 1.

[0062] S26: After welding the cross beam 12 and the deck unit 11, remove the above-mentioned longitudinal rib bolts.

[0063] It can be understood that after the current bridge deck mother segment 1 is installed in step S1, the ends of the bridge deck units 11 are suspended. At this time, the construction of the first round is completed, but there are still some cross beams 12 not installed at the suspended ends of the current bridge deck mother segment 1. At the beginning of the next round of construction, first, cross beams with a length of H equal to the length of the suspended part of the previous bridge deck mother segment 1 are arranged at intervals along the set length direction on the assembly jig, and then cross beams 12 of the next bridge deck segment with a set length are continuously arranged at intervals along the set length direction on the assembly jig. The previous bridge deck segment is lifted, and the bridge deck units 11 of the previous bridge deck segment are positioned with the cross beams 12 with a suspended length of H set at the beginning of this round of construction. Then, the next bridge deck unit 11 is laid on the cross beams 12 with a set length of the next bridge deck segment, and the ends of the bridge deck units 11 are also suspended, waiting to be installed with the corresponding cross beams 12 during the next round of construction.

[0064] Therefore, during the installation of a bridge assembly segment, some cross beams 12 near the ends are reserved without installation, and the ends of the bridge deck units 11 are suspended there to serve as the mother segment for the next round of construction. After being positioned with the cross beams 12 with a corresponding suspended length H during the next round of construction, they are fixedly connected to the bridge deck units 11 of the next bridge deck segment through longitudinal rib bolts, thus ensuring the transverse accuracy of the splicing of the bridge deck units 11 on two adjacent bridge deck segments.

[0065] It should be noted that when installing and splicing two adjacent bridge deck mother segments 1, the longitudinal rib bolts can be removed only after the longitudinal welds between the bridge deck units 11 and the welding between the cross beams 12 are completed, so as to ensure the accuracy during assembly.

[0066] As Figure 4 shown, the upper and lower two bridge deck mother segments 1 are connected by web members 3 and chord members 4 to form a fully welded steel truss beam segment, and each of the upper and lower two bridge deck mother segments 1 is spliced by the above construction method.

[0067] In some alternative embodiments, high-strength bolts can be used for splicing connection between two adjacent bridge assembly segments to improve the anti-fatigue performance of the bridge deck units 11.

[0068] A method for assembling an orthotropic steel bridge deck of a fully welded steel truss girder. Position the bridge deck units above the crossbeams of a set length, with the ends of the bridge deck units suspended. Weld the longitudinal welds of two adjacent bridge deck units perpendicular to the set direction for the set length. After welding and fixing the bridge deck units to the crossbeams, splice the bridge deck units of the previous bridge deck mother section with the crossbeams at the suspended positions, thus avoiding the problem that when welding the longitudinal butt welds of two adjacent bridge deck units, the process of thermal expansion and contraction will cause lateral contraction between the bridge deck units, resulting in misalignment when splicing the bridge deck units of the next bridge deck mother section with those of the previous bridge deck mother section. Weld the longitudinal butt welds of two adjacent bridge deck units perpendicular to the set direction on one bridge deck mother section for the set length, and do not weld the longitudinal butt welds at the suspended ends of the bridge deck units, and adapt to the lateral contraction through the self-deformation of the non-welded section. Temporarily connect two adjacent bridge deck units in the set direction with longitudinal rib bolts. After the longitudinal welds between the bridge deck units and the welding with the crossbeams are completed, remove the longitudinal rib bolts, thereby fixing the relative positions of two adjacent bridge deck units in the set direction and making the splicing of two adjacent bridge deck units in the set direction more accurate. Connect at least one bridge deck segment between the bridge deck mother section completed in the previous construction round and the bridge deck mother section completed in the next construction round, so as to reduce the construction steps of each bridge deck assembly segment and improve the construction efficiency.

[0069] In the description of the present application, it should be noted that the orientation or positional relationship indicated by terms such as "upper" and "lower" is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application. Unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0070] It should be noted that in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variation thereof is intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the said element.

[0071] The above are only specific embodiments of the present application, enabling those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but rather will conform to the broadest scope consistent with the principles and novel features claimed herein.

Claims

1. A method for assembling an orthotropic steel bridge deck of a fully welded steel truss girder, characterized in that, It includes the following steps: The cross beams (12) of the current bridge deck mother section (1) with a set length are arranged at intervals along the set direction. The bridge deck units (11) are laid above the cross beams (12) of the set length, and the ends of the bridge deck units (11) are left hanging. The cross beams (12) with the length of the hanging part of the bridge deck units (11) of the previous bridge deck mother section are arranged at intervals along the set direction, and then the cross beams (12) of the next bridge deck mother section (1) with a set length are continuously arranged. The bridge deck units (11) of the previous bridge deck mother section (1) are spliced with the cross beams (12) at the hanging positions, and the next bridge deck units (11) are laid on the cross beams (12) of the next bridge deck mother section. Repeat this step until the installation of a bridge assembly segment is completed. Laying the bridge deck units (11) above the cross beams (12) of the set length includes, after the bridge deck units (11) are positioned with the cross beams (12), welding the longitudinal butt welds of two adjacent bridge deck units (11) perpendicular to the set direction for the set length. Before arranging the cross beams (12) of the current bridge deck mother section (1) with a set length at intervals along the set direction, at least one bridge deck segment (5) is installed along the set direction at a position far from the hanging position, and the bridge deck of the bridge deck segment (5) is connected to the bridge deck units (11) of the current bridge deck mother section (1) by longitudinal rib bolts. After the bridge deck units (11) are welded and fixed to the cross beams (12), the longitudinal rib bolts are removed.

2. The method for assembling an orthotropic steel bridge deck of a fully welded steel truss girder according to claim 1, characterized in that, After splicing the bridge deck units (11) of the previous bridge deck mother section with the cross beams (12) at the hanging positions, weld the longitudinal butt welds at the hanging ends of the bridge deck units (11).

3. The method for assembling an orthotropic steel bridge deck of a fully welded steel truss girder according to claim 1, characterized in that, The bridge deck units (11) are perpendicular to the cross beams (12) and are installed from the middle to both sides in the transverse bridge direction.

4. The method for assembling an orthotropic steel bridge deck of a fully welded steel truss girder according to claim 1, characterized in that, The ratio of the set length to the length of the bridge deck mother section (1) is 2:

3.

5. The method for assembling an orthotropic steel bridge deck of a fully welded steel truss girder according to claim 1, characterized in that, After arranging the cross beams (12) with the length of the hanging part of the bridge deck units (11) of the previous bridge deck mother section at intervals along the set direction, at least one bridge deck segment (5) is continuously arranged along the set direction, and then the cross beams (12) of the next bridge deck mother section (1) with a set length are continuously arranged along the set direction.

6. The method for assembling an orthotropic steel bridge deck of a fully welded steel truss girder according to claim 5, characterized in that, Connect the bridge deck of the bridge deck units (11) of the previous bridge deck mother section (1) and the bridge deck of the bridge deck segment (5) by longitudinal rib bolts, and remove the longitudinal rib bolts after the bridge deck units (11) are welded to the cross beams (12).

7. The method for assembling an orthotropic steel bridge deck of a fully welded steel truss girder according to claim 6, characterized in that, The longitudinal rib bolts are temporary bolts and are installed between two adjacent bridge deck units (11) in the set direction by using the permanent bolt holes on the longitudinal ribs of the bridge deck units (11).

8. The method for assembling an orthotropic steel bridge deck of a fully welded steel truss girder according to claim 1, characterized in that, The cross beam (12) includes a plurality of cross beam block units (121) connected in sequence.

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