A super-large cross-section steel-concrete double-wall crossbeam member structure with attached steel bars

Abstract

The present invention relates to a steel-concrete cross beam member structure with super-large cross-section and attached steel bars. The outer wall of the steel-concrete cross beam with a super-large cross-section and attached steel bars in a double-wall plate and "hui"-shaped structure has a height and width of 7.8×8.5 m, and the length of the cross beam is equal to or greater than 41 m. The double-wall steel-concrete cross beam member is composed of multiple cross beam members, and each steel-concrete cross beam member is composed of an inner wall plate unit, an outer wall plate unit and a partition. Two partitions are respectively distributed at both ends of each cross beam member, and mesh steel bars are installed between the two sealing plates. Advantages: First, it solves the problems of few partitions, low stiffness, small operation space, difficult segment assembly, and difficult deformation control in the double-wall steel shell cross beam; second, it not only ensures the connection accuracy of steel bars, but also ensures the manufacturing accuracy of the cross beam member; third, it reduces the overall assembly time, improves the assembly efficiency, reduces the high-altitude operation time, and ensures the safe operation of construction personnel.

Description

Technical Field

[0001] The present invention relates to a super-large cross-section reinforced double-wall steel-concrete crossbeam member structure combining a reinforced block and horizontal long-line total assembly, belonging to the field of manufacturing of crossbeams between bridge towers. Background Art

[0002] Traditionally, the crossbeam between middle towers is of box structure, and basically follows the manufacturing mode of plate element → trough type → member; recently, the steel shell structure is mainly applied to the design of tower columns, and its manufacturing process is also basically the vertical assembly section process of plate elements. However, the above processes are not applicable to the manufacturing of the reinforced steel shell crossbeam members. The reasons are as follows: Although the reinforced steel shell crossbeam members belong to super-large cross-section and extra-long members, their welding and steel bar assembly operations are completed between the double walls. The net distance between the double walls is 1.05 - 1.48 m, and stiffening ribs, shear studs and steel bars are densely arranged. The actual operating space is extremely narrow, and the manufacturing of the crossbeam is extremely difficult. Moreover, the welding of the crossbeam members, the installation of steel bars, the dimensional accuracy of the member structure and the matching degree with the tower column joints are the key points and also the difficulties in the manufacturing of the crossbeam. How to complete the manufacturing of the reinforced crossbeam members while ensuring various processing precisions is the difficulty and also the key point in the manufacturing of the crossbeam. Summary of the Invention

[0003] Design purpose: To avoid the deficiencies in the background art, design a super-large cross-section reinforced double-wall steel-concrete crossbeam member structure that can not only solve the problems such as few diaphragms, low stiffness, small operating space, great difficulty in segment assembly, great difficulty in deformation control, etc. of the double-wall steel shell crossbeam, but also effectively ensure high manufacturing precision of the crossbeam members, short total assembly time, high assembly efficiency, reduce the high-altitude operation time, and ensure the safe operation of construction workers.

[0004] Design scheme: In order to achieve the above design purpose, the present invention is designed as follows: First, for super-large cross-section and extra-long members, in order to simplify the manufacturing process and reduce the processing difficulty, a length segmentation structure is adopted, and the cross-sectional direction is a block structure. When dividing the blocks, by reserving lap joints, adjusting the weld direction and the lap relationship between plate parts, the high-altitude operation and the operation amount in a narrow space are reduced; Second, for the characteristics that the stiffening plates and steel bars are densely arranged in the rectangular area of the crossbeam, the operating space is narrow, the cross-section is extremely high and large, and the operations such as assembly and welding are extremely difficult, the complex structure of the crossbeam is dispersed into each manufacturing link. Through the operations of reinforced plate element → reinforced block → horizontal long-line total assembly, the operations of plate parts and steel bars are completed crosswise with each other, simplifying the manufacturing process; Third, according to the erection attitude of the crossbeam and its structural form, the total assembly adopts horizontal assembly, and a long-line assembly process is adopted.

[0005] Technical requirements for the cross-tower section of the lower crossbeam of the steel tower in the present invention. The cross-sectional dimensions are 6.8×8m and 7.8×8.5m respectively, and the crossbeam is about 41m long, belonging to an ultra-large cross-section and extra-long double-wall loop-shaped member. The crossbeam is a steel-concrete structure. In addition to the double-layer wall panels and diaphragms, in order to increase the bonding force between the steel and concrete and make them work together, longitudinal steel bars, circumferential steel bars and hook bars between the circumferential steel bars are arranged between the double walls of the loop shape. At the same time, shear studs are densely arranged on the side wall panels of the crossbeam casting. All steel bars must be arranged through the reserved holes on the stiffeners of the wall panels. There is a solid part in the middle of the crossbeam, and mesh steel bars are arranged therein, and hook bars are erected between the mesh steel bars.

[0006] To meet the technical requirements of the present invention, the present invention solves the problems such as few diaphragms, low stiffness, small operation space, great difficulty in segment assembly, and great difficulty in deformation control of the double-wall steel shell crossbeam by adopting a manufacturing method combining the attached steel bar block and long-line horizontal overall assembly. Second, through the cross-operation of assembling parts and steel bars and step-by-step welding, the manufacturing of the crossbeam members of the attached steel bar steel shell type is realized, which can not only ensure the connection accuracy of the steel bars, but also effectively ensure the manufacturing accuracy of the crossbeam members.

[0007] 1. Block division plan

[0008] Longitudinal division of the crossbeam segment: In order to meet the hoisting capacity at the construction site, facilitate transportation and construction, the crossbeam members are longitudinally divided into several small segments to ensure that there are at least two diaphragms distributed at both ends of each crossbeam member to play the role of connecting and supporting between the inner and outer wall panels. At the same time, in order to facilitate the hoisting and docking construction at the bridge site, the joint parts at both ends of the crossbeam and the tower columns are made into a whole, and the middle members are manufactured separately. The longitudinal division plan of the crossbeam is as Figure 6 shown.

[0009] Transverse block division of the crossbeam segment: The single crossbeam member adopts the horizontal overall assembly process. In order to improve the assembly efficiency, ensure the manufacturing accuracy, and facilitate construction at the same time, the crossbeam is divided into 4 blocks, namely upper, lower, left and right, for manufacturing, as shown in Figure 7 .

[0010] The block division of the crossbeam mainly considers the assembly sequence of the blocks and the auxiliary positioning function. The blocks positioned first can act as the inner tire or outer tire of the subsequent upper blocks during the assembly process to improve the assembly efficiency and accuracy. As shown in Figure 7 , at the partition and web at the position of No. ①, straight edges and wall panels are reserved respectively. When the blocks K2 and K3 are in place, the settings at the position of No. ① can play the role of the outer tire when positioning the block K1; similarly, the settings at the position of No. ② can play the role of the inner tire when positioning the side blocks K2 and K3, which is beneficial to the auxiliary positioning of the blocks and ensures the assembly accuracy (where the block includes a set of inner and outer wall panels of the crossbeam, the wall panel spacer and the steel bars between the wall panels).

[0011] Steel bar division inside the cross beam: Multi-directional steel bars are arranged between the double walls of the cross beam (i.e., inner and outer ring steel bars along the length direction of the cross beam, circumferential steel bars of the inner and outer rings of the cross beam, and hook steel bars between the inner and outer ring steel bars). Under the combined action of the plate members, shear studs and concrete, the bearing capacity of the cross beam is improved. To ensure the simplicity and feasibility of the assembly of the cross beam segments, while longitudinally and transversely dividing its plate members (for example, Figure 6 as shown, the cross beam is divided into 6 segments in the total length direction of the cross beam; as Figure 7 shown, according to the idea of block production, based on the double-square structure, the inner and outer walls of the four sides of the cross beam are each taken as a group to form a block), it is necessary to disconnect the steel bars affecting the assembly according to the different assembly positions and connection relationships of the steel bars (according to the different steel bar arrangements, the steel bars along the length direction of the cross beam can be inserted from one end when the cross beam member assembly is completed; for the circumferential steel bars parallel to the inner and outer walls of the cross beam port, they cannot be installed after the cross beam assembly. Especially, the outer ring circumferential steel bars are arranged in a closed loop, and the steel bars pass through the circumferential stiffeners of the outer wall plate. To realize the installation of the steel bars, they must be divided into several small segments.), and design the lap joint (welded lap joint) form (see Figure 9 ).

[0012] (1) Division method of longitudinal steel bars inside the cross beam segment (see Figure 17 ): The longitudinal steel bars are arranged longitudinally and continuously along the inner and outer wall plates of the cross beam, matching the cross beam segment division (the cross beam segment division is set according to the lifting capacity at the bridge site, and the steel bar disconnection position is consistent with the cross beam segment). At the cross beam disconnection position, the longitudinal steel bars are simultaneously disconnected, and the mechanical connection form is adopted to realize the continuous setting of the steel bars.

[0013] (2) Division method of circumferential steel bars inside the cross beam segment (see Figure 4 and 18 ): The cross beam segment adopts the production process of first making blocks and then segments. To realize the above manufacturing process, the division of the circumferential steel bars attached to the inner and outer wall plates of the cross beam must match the plate member division (the circumferential steel bars inside the cross beam are divided into two layers, the longitudinal and transverse steel bars on the inner layer cross section are in a lap relationship, and they respectively belong to the four blocks divided by the cross beam, so there is no need to be segmented. The outer ring steel bars are designed in a closed loop. To match the block division, the disconnection positions of the outer ring steel bars are respectively set at the lap connection and mechanical connection parts in the following figure).

[0014] The circumferential steel bars 6 of the inner wall panel of the crossbeam are arranged in contact with the inner wall panel and are four separate ones, so there is no need to re-break them. The circumferential steel bars 5 of the outer wall panel are arranged in a closed manner around the outer wall panel. Whether the crossbeam segment is fabricated by overall welding or by the block process, break points need to be set for the steel bars to complete the assembly operation. To match the fabrication process of first making blocks and then segments, break points are set inside the left and right blocks of the circumferential steel bars 5 of the outer wall panel. The steel bars are mechanically connected at the break point positions, and the distance between the mechanical connection positions and the angular welds between the wall panels needs to meet the welding distance requirements to ensure the weld quality. Between the upper and lower blocks, a lap joint form is adopted. The main reason is that the circumferential steel bars 5 of the outer wall panel are in a U-shaped structure on the upper and lower blocks, and their bending positions are exactly at the four corners of the crossbeam segment, close to the angular welds. To ensure the welding quality of the angular parts, a lap joint form is set. During the fabrication of the crossbeam segment, the steel bars can be telescoped in the length direction according to the assembled state to avoid affecting the welding operation.

[0015] In addition to the above steel bars, mesh steel bars are installed between the two sealing plates inside the crossbeam segment (the mesh steel bar label is marked in the figure). The steel bars here are planned to be installed during the assembly of the crossbeam segment.

[0016] 2. Segment refinement plan: The crossbeam member structure is complex. The inner and outer wall plates are densely distributed with stiffening plates and shear studs, and there are circumferential steel bars attached to the roots of the inner and outer wall plates. The inner and outer circumferential steel bars are connected by hook bars. At the same time, longitudinal steel bars penetrate through the member. The steel bars at different positions pass through the stiffening openings, partition openings, etc. separately or simultaneously.

[0017] To improve the accuracy of the processed parts and ensure the smooth and accurate assembly of the internal components, the crossbeam member is modeled with CATIA, and the relationships between the parts are inspected from the model to form the opening dimensions and the contour dimensions of each part.

[0018] Technical solution: A super-large cross-section steel-concrete composite crossbeam member with attached steel bars. The cross-section of the super-large cross-section steel-concrete composite crossbeam member is a double-wall panel in a square frame structure. The height and width of the outer wall of the steel-concrete composite crossbeam with a double-wall panel in a square frame structure are 7.8×8.5 m, and the length of the crossbeam is equal to or greater than 41 m. The double-wall steel-concrete composite crossbeam member is composed of multiple crossbeam members, and each steel-concrete composite crossbeam member is composed of an inner wall panel unit, an outer wall panel unit, and a partition. Two partitions are respectively distributed at both ends of each crossbeam member, and mesh steel bars 11 are installed between the two sealing plates.

[0019] Compared with the background art, the present invention has the following advantages: Firstly, by adopting the technical solution of combining the attached-rib block and the long-line horizontal overall assembly, it solves the problems such as few diaphragms, low stiffness, small operation space, great difficulty in segment assembly and deformation control in the double-wall steel shell type cross beam; Secondly, through the cross-operation of assembling parts and steel bars and welding step by step, the fabrication of the cross beam members of the attached-rib steel shell type is realized; while ensuring the connection accuracy of the steel bars, it also effectively ensures the fabrication accuracy of the cross beam members; Thirdly, the present invention reduces the overall assembly time, improves the assembly efficiency, and will reduce the high-altitude operation time, ensuring the safe operation of the construction personnel; Fourthly, the technology is advanced and reliable, saving costs and significantly accelerating the construction progress, with remarkable economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the cross section of the cross beam.

[0021] Figure 2 It is a front view schematic diagram of the cross beam.

[0022] Figure 3 It is a schematic diagram of the arrangement of cross beam panel members.

[0023] Figure 4 It is a schematic diagram of the arrangement of cross beam section steel bars.

[0024] Figure 5 It is a schematic diagram of the arrangement of steel bars in the middle solid concrete part.

[0025] Figure 6 It is a schematic diagram of the longitudinal division of cross beam members.

[0026] Figure 7 It is a schematic diagram of the block division of cross beam members.

[0027] Figure 8 It is a schematic diagram of the circumferential reinforcement division of the cross beam outer wall.

[0028] Figure 9 It is a schematic diagram of the disconnection of the circumferential steel bar 5 of the outer wall plate.

[0029] Figure 10 It is a schematic diagram of the welding form of the cross beam.

[0030] Figure 11 It is a schematic diagram of the 3D model of the cross beam member.

[0031] Figure 12 It is a schematic diagram of the attached-rib block structure.

[0032] Figure 13 It is a schematic diagram of the plate unit structure.

[0033] Figure 14 It is a schematic diagram of the attached-rib block structure.

[0034] Figure 15It is a schematic diagram of the assembly of the crossbeam members.

[0035] Figure 16 It is a schematic diagram of the long-line operation of the crossbeam members.

[0036] Figure 17 It is a schematic diagram of the division method of the internal longitudinal steel bars of the crossbeam segment.

[0037] Figure 18 It is a schematic diagram of the division method of the internal circumferential steel bars of the crossbeam segment.

[0038] Figure 19 It is a main elevation schematic diagram of the assembly flat tire.

[0039] Figure 20 It is a schematic diagram of the mechanical connection of the steel bars at the break point. Specific implementation mode

[0040] Example 1: Refer to Appendix Figure 1 --20. A super-large cross-section double-wall steel-concrete composite crossbeam member structure, the cross-section of the super-large cross-section double-wall steel-concrete composite crossbeam member is a double-wall plate square structure, the dimensions of the steel-concrete composite crossbeam member of the double-wall plate square structure are that the inner wall width is equal to or greater than 6.8 m × the inner wall length is equal to or greater than 8 m, the outer wall width is equal to or greater than 7.8 × the outer wall length is equal to or greater than 8.5 m, the crossbeam length is equal to or greater than 41 m, the double-wall steel-concrete composite crossbeam member is composed of multiple crossbeam members, and each steel-concrete composite crossbeam member is composed of an inner wall plate unit, an outer wall plate unit and a partition board. Two partition boards 4 are respectively distributed at both ends of each crossbeam member, and mesh steel bars 11 are installed between the two sealing plates 4.

[0041] The inner wall panel unit is composed of an inner wall panel 2, longitudinal stiffening plates 3, and shear studs 10. Multiple longitudinal stiffening plates 3 are arranged at intervals on the surface of the inner wall panel 2, and multiple shear studs 10 are arranged between the multiple longitudinal stiffening plates 3; the outer wall panel unit is composed of an outer wall panel 1, longitudinal stiffening plates 3, and shear studs 10. Multiple longitudinal stiffening plates 3 are arranged at intervals on the outer wall panel surface, and multiple shear studs 10 are arranged between the multiple longitudinal stiffening plates. Longitudinal steel bars, circumferential steel bars, and hook bars between the circumferential steel bars are arranged between the double U-shaped wall panels, that is, between the inner wall panel and the outer wall panel. Shear forces are evenly distributed on the side wall panels of the crossbeam casting. A solid part is arranged in the middle of the crossbeam, and mesh steel bars are arranged therein, and hook bars are erected between the mesh steel bars. The reinforced concrete crossbeam member of the double-wall panel U-shaped structure is composed of four reinforced block bodies on the upper, lower, left, and right. The reinforced block body is composed of an outer wall panel 1, an inner wall panel 2, a partition 4, an outer wall panel circumferential steel bar 5, an inner wall panel circumferential steel bar 6, an outer wall panel longitudinal steel bar 7, and an inner wall panel longitudinal steel bar 8; the partition 4 is assembled based on the reference line of the inner wall panel 2, the outer wall panel 1 is assembled by aligning the lines, the fillet welds of the partition 4 with the outer wall panel 1 and the inner wall panel 2 are welded, and the fillet welds of the longitudinal stiffening plate 3 with the partition 4 are welded. The outer wall panel circumferential steel bar 5 and the inner wall panel circumferential steel bar 6 are respectively arranged on the outer wall panel 1 and the inner wall panel 2. The outer wall panel longitudinal steel bar 7 is arranged on the outer wall panel circumferential steel bar 5, and the inner wall panel longitudinal steel bar 8 is arranged on the inner wall panel circumferential steel bar 6. The inner wall panel circumferential steel bar 6 is arranged in contact with the inner wall panel and is set separately in four pieces.

[0042] The outer wall panel circumferential steel bar 5 is arranged in a closed loop along the circumference of the outer wall panel, and break points need to be set on the outer wall panel circumferential steel bar 5. Break points are set inside the left and right block bodies of the outer wall panel circumferential steel bar 5, and mechanical connections are used at the break point positions of the steel bars. The distance between the mechanical connection positions and the fillet welds at the edges of the wall panels. The reinforced block bodies are arranged in a vertical and horizontal arrangement. Between the upper and lower reinforced block bodies, the outer wall panel circumferential steel bar 5 is in a U-shaped structure on the upper and lower blocks, and its bending position is exactly at the four corners of the crossbeam section, and lap joint forms are arranged close to the fillet welds at the edges. During the production of the crossbeam section, the steel bars can be telescoped in the length direction in the assembled state by adopting lap joint forms.

[0043] The manufacturing method of the super-large cross-section reinforced double-wall steel-concrete crossbeam member:

[0044] 1. The manufacturing includes the following steps:

[0045] (1) Manufacturing of the panel unit: Taking the K1 block as an example, the manufacturing process of the panel unit and the reinforced block body is introduced. First, the structure of the reinforced block body K1 is as Figure 12 shown, that is

[0046] A single reinforced block body K1 is composed of a panel unit K1-1, a panel unit K1-2, a partition 4, an outer wall panel circumferential steel bar 5, an inner wall panel circumferential steel bar 6, an outer wall panel longitudinal steel bar 7, and an inner wall panel longitudinal steel bar 8.

[0047] The production of the reinforcing bar block follows the process of plate element production → reinforcing bar block production, which is specifically described as follows:

[0048] The plate elements K1-1 and K1-2 are respectively composed of an outer wall plate 1, an inner wall plate 2, longitudinal stiffening plates 3, and shear studs 10.

[0049] The production process of the plate element: See Appendix Figure 13 。

[0050] ① To ensure the assembly accuracy of the plate element and the flatness of the wall plate, the production of the plate element is completed on a special assembly flat jig. The flatness of the top surface of the flat jig should be ≤ 2.0 mm.

[0051] ② During the assembly process of the plate element, longitudinal and transverse baseline lines are drawn on the outer wall plate 1, and based on the longitudinal and transverse baseline lines, the assembly position lines of the longitudinal stiffening plates 3 and the shear studs 10 are drawn, and the longitudinal stiffening plates 3 are assembled according to the lines.

[0052] ③ To ensure the welding quality of the plate element and reduce welding deformation, the plate element welding can be carried out with pre-set reverse deformation welding on the ship position jig, and at the same time, the welding should be carried out symmetrically from the middle to both ends synchronously.

[0053] ④ Weld the shear studs 10 according to the lines, trim the welding deformation of the plate element, and ensure that the flatness is ≤ 1.0 mm / m.

[0054] ⑵ The manufacture of the reinforcing bar crossbeam block: See Figure 14 。To speed up the production efficiency of the crossbeam members, improve the assembly accuracy and welding quality, reduce high-altitude operations, and ensure relatively safe construction, the crossbeam members are first manufactured in block form. During the block production process, the welds between the partition plates and the inner and outer wall plates, as well as the installation of the steel bars within a single block, will be completed, greatly simplifying the manufacturing difficulty of the crossbeam. The crossbeam block is manufactured using a horizontal assembly method, and the assembly process and control key points are as follows:

[0055] ① On the jig of the longitudinal and crossbeam system, first lay the inner wall plate unit K1-2, and then assemble the partition plate 4 based on the reference line of the inner wall plate unit K1-2, and assemble the inner wall plate unit K1-1 while aligning the lines.

[0056] ② Check the assembly dimensions. After meeting the requirements, weld the fillet welds of the partition plate 4 with the outer wall plate unit K1-1 and the inner wall plate unit K1-2 panels, and weld the fillet welds of the longitudinal stiffening plate 3 with the partition plate 4.

[0057] ③ Check the external dimensions after welding, and trim the welding deformation through methods such as flame straightening to ensure the overall dimensional accuracy of the block K1.

[0058] ④ Install the circumferential steel bars 5 and 6 of the inner and outer wall plates and fix them relatively. The circumferential steel bars 5-1 and 5-2 of the outer wall plate are not temporarily lap-welded.

[0059] ⑤ Install longitudinal steel bars 7 and 8, and the longitudinal steel bars are connected and fixed to the block by binding.

[0060] ⑶ Total assembly and fabrication of crossbeam members: See Figure 15 and Figure 16 . A single crossbeam member consists of a total of four blocks, namely K1, K2, K3, and K4. The crossbeam connects the two tower columns and is installed in a horizontal state. Considering the structural form and installation position of the crossbeam, the fabrication of the crossbeam members adopts the long-line operation of horizontal total assembly. The specific manufacturing process is as follows:

[0061] ① Inspect the crossbeam total assembly jig to be qualified, with the overall flatness ≤ 2 mm, and draw longitudinal and transverse baselines on the jig.

[0062] ② Align the longitudinal and transverse baselines of the bottom plate of the first lower block K4 of the crossbeam with the baselines drawn on the jig, adjust the relative position and various positions of block K4, and then fix it to the jig with horses.

[0063] ③ Align the longitudinal baselines of the blocks, control the transverse baseline spacing between adjacent member blocks K4, and place the remaining member blocks K4 in sequence. At the same time, focus on controlling the offset of the inner and outer wall plates between adjacent blocks.

[0064] ④ Align the transverse baselines, position and assemble the side blocks K2 and K3 of the first crossbeam member, control the spacing between the two blocks, and the perpendicularity between them and the wall plate of the lower block. Fix the blocks with horses, and at the same time add rigid supports to prevent the side blocks from tipping over.

[0065] ⑤ Align the longitudinal baselines of the side blocks K2 and K3 on both sides of the first member, and align the transverse baseline of the lower block K4 of its own member, and then position and assemble the remaining side blocks K2 and K3 in sequence.

[0066] ⑥ Install the hook bars 9 at the circumferential steel bars of the inner and outer wall plates of blocks K2, K3, and K4. At the same time, install the casing, mesh bars, circumferential steel bars around the casing, and hook bars between the mesh bars in the solid section of the crossbeam.

[0067] ⑦ Align the transverse baselines, position and assemble the upper block K1 of the first crossbeam member, control the box opening dimensions at both ends of the crossbeam member, and fix the blocks with horses.

[0068] ⑧ Align the longitudinal baseline of the upper block K1 of the first member, and align the transverse baseline of the upper block K1 of its own member, and then position and assemble the remaining side blocks K1 in sequence.

[0069] ⑨ Shrink the circumferential steel bars 5-1 and 5-2 of the outer wall plate inward to leave enough welding space for the welds between the outer wall plate and the web. Complete the welding of the welds between the blocks, and pay attention to controlling the welding shrinkage to reduce the welding deformation.

[0070] ⑩ Adjust the circumferential steel bars 5-1 and 5-2 of the outer wall plate to the specified positions, complete the lap welding between the two steel bars, and at the same time complete the mechanical connection between the circumferential steel bars of the outer wall plate at the remaining web positions.

[0071] ⑾ Trim various deformations of the crossbeam members. After rectification and qualification, inspect the positional relationship between the members and the matching degree of the box openings. Pre-connect the mechanical connection joints between the longitudinal steel bars at the ring opening positions and check their matching;

[0072] ⑿ After the overall inspection is qualified, install the matching parts at the ring opening positions of the crossbeam.

[0073] 2. Welding plan: The crossbeam members are members with an extra-large cross-section. Through block production, most of the welding operations are completed during the production of plate units and blocks. To facilitate the welding operations during the production of the members and ensure the weld quality, the groove direction and the welding position state of the groove are mainly considered in welding.

[0074] During the production of the members, the welding operations of the welds of types I - V in the figure are mainly completed. Among them, the welding of the upper end welds are all high-altitude operations. To facilitate the operation and ensure the construction safety and reliability, different lapping and welding forms are given for different positions in the welding form design, as shown in Figure 10 .

[0075] Weld I is the weld between the outer web and the outer top plate. The welding groove is opened on the outside of the top plate to ensure that the operator can weld outside the top plate;

[0076] Weld II is the butt weld of the diaphragm. Here, mainly considering the welding space, the weld form is designed as a single-sided welding with double-sided forming groove. A backing plate is pasted on the inner side of the box and welded on the outside, which is convenient for welding;

[0077] Weld III is the weld between the inner web and the inner top plate. The welding groove is opened on the outside of the inner top plate to ensure that the operator can weld outside the inner top plate and avoid overhead welding at high altitude;

[0078] Weld IV is the weld between the outer web and the outer bottom plate. The welding groove is opened on the outside of the outer web to ensure that the operator can weld in a flat position;

[0079] Weld V is the weld between the inner web and the inner bottom plate. The welding groove is opened on the outside of the inner web to ensure that the operator can weld in a flat position;

[0080] It should be understood that: Although the above embodiments have made a relatively detailed written description of the design concept of the present invention, these written descriptions are only simple written descriptions of the design concept of the present invention, rather than limitations on the design concept of the present invention. Any combination, addition or modification that does not exceed the design concept of the present invention falls within the protection scope of the present invention.

Claims

1. A super-large cross-section steel-concrete double-wall beam member structure with attached reinforcement, characterized in that: The cross-section of the super-large cross-section double-wall steel-concrete crossbeam member is a double-wall plate square structure. The outer wall of the steel-concrete crossbeam with the double-wall plate square structure has a height-width of 7.8×8.5 m, and the length of the crossbeam is greater than or equal to 41 m. The double-wall steel-concrete crossbeam member is composed of multiple crossbeam members, and each steel-concrete crossbeam member is composed of an inner wall plate unit, an outer wall plate unit, and a partition. Two sealing plates are respectively distributed at both ends of each crossbeam member, and a mesh reinforcement is installed between the two sealing plates; the inner wall plate unit is composed of an inner wall plate, longitudinal stiffening plates, and shear studs. Multiple longitudinal stiffening plates are arranged at intervals on the inner wall plate surface, and multiple shear studs are arranged between the multiple longitudinal stiffening plates; the outer wall plate unit is composed of an outer wall plate, longitudinal stiffening plates, and shear studs. Multiple longitudinal stiffening plates are arranged at intervals on the outer wall plate surface, and multiple shear studs are arranged between the multiple longitudinal stiffening plates; the steel-concrete crossbeam member with the double-wall plate square structure is composed of four reinforced blocks on the top, bottom, left, and right; the reinforced block is composed of an outer wall plate, an inner wall plate, a partition, outer wall plate circumferential reinforcement, inner wall plate circumferential reinforcement, outer wall plate longitudinal reinforcement, and inner wall plate longitudinal reinforcement; the partition is assembled based on the reference line of the inner wall plate, the outer wall plate is assembled by aligning the lines, the fillet welds of the partition with the outer wall plate and the inner wall plate surface are welded, the fillet welds of the longitudinal stiffening plates with the partition are welded, the outer wall plate circumferential reinforcement and the inner wall plate circumferential reinforcement are respectively arranged on the outer wall plate and the inner wall plate, the outer wall plate longitudinal reinforcement is arranged on the outer wall plate circumferential reinforcement, and the inner wall plate longitudinal reinforcement is arranged on the inner wall plate circumferential reinforcement; the inner wall plate circumferential reinforcement is arranged in contact with the inner wall plate and is set separately as four; the outer wall plate circumferential reinforcement is arranged in a closed loop along the circumference of the outer wall plate. The outer wall plate circumferential reinforcement is provided with breakpoints inside the left and right blocks, and the reinforcement is mechanically connected at the breakpoint positions, and the welds between the blocks are welded.

2. The super-large cross-section double-wall steel-concrete crossbeam member structure according to claim 1, characterized in that: A solid part is arranged in the middle of the crossbeam, and mesh reinforcement is arranged therein, and hook reinforcement is erected between the mesh reinforcements.

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