A steel box girder butt joint assembly type connecting node device

Abstract

The utility model discloses a kind of steel box girder butt joint assembly type connecting joint device, girder inlaying constraint steel end plate, constraint cover plate and central plugging steel plate, girder inlaying constraint steel end plate includes inlaying part and annular wing plate, side part constraint ring seal plate is equipped with the side insertion rib of insertion girder end installation gap, the side help board of constraint cover plate is equipped with the cover insertion rib of insertion girder end installation gap, constraint cover plate and side part constraint ring seal plate mortise and tenon connection;Central plugging steel plate is through and plugging central installation gap, one end is limited, the other end is limited through bolt anchoring. The utility model is steel box girder butt joint assembly type connecting joint device, all adopt assembly type connection, welding operation is not needed, by setting constraint component in steel box girder inside, outside, make it under external force piece common action, constraint box girder butt joint connecting end position does not produce relative displacement and corner between, to reach box girder effective butt joint fixed.

Description

Technical Field

[0001] This utility model belongs to the field of steel structure, and in particular to a prefabricated connection node device for butt joints of steel box girders. Background Technology

[0002] Currently, on-site connection of steel box girders mainly relies on two types of processes:

[0003] I. Bolted and welded joint process:

[0004] When the space requirements for operators to enter the box girder are met, high-strength bolts and double-clamped plates are used to connect the bottom plate and side plates, and the top plate is welded on site. When this method is used, the ventilation and lighting conditions inside the large box girder are poor, the accumulation of welding fumes leads to a harsh working environment, and the welding quality cannot be guaranteed. At the same time, the welding heat-affected zone is prone to cause local buckling deformation of the box girder web.

[0005] II. Full welding process:

[0006] This method is suitable for enclosed, small-section box girders where the interior cannot be accessed. When this method is applied, weld quality control depends entirely on the welder's skills, and the shortcomings of the welding process become more apparent.

[0007] In existing prefabricated construction technologies, steel components are typically connected with bolt groups, resulting in low assembly efficiency.

[0008] Therefore, existing technologies suffer from poor process adaptability, uncontrollable welding quality, and low assembly efficiency, and there is an urgent need to develop a welding-free, high-precision, and quick-assembly connection device. Utility Model Content

[0009] The purpose of this utility model is to provide a prefabricated connection node device for steel box girder butt joints, which solves the technical problems in the construction of steel box girder butt joints of existing steel frame structures, such as the inability to separate welding operations, low construction efficiency, difficulty in controlling welding quality, high fire hazards, and impact on the health of workers. At the same time, it solves the technical problem of low assembly efficiency in the existing prefabricated technology that uses steel components with bolt groups for connection.

[0010] To achieve the above objectives, the present invention adopts the following technical solution:

[0011] A prefabricated connection node device for butt joints of steel box girders includes:

[0012] Two sets of symmetrically arranged beams are embedded with restraining steel end plates. Each set includes an embedded part that fits against the inner wall of the steel box girder and an exposed annular wing plate. An installation gap is formed between the annular wing plate and the end of the steel box girder. A central installation gap is reserved between the two annular wing plates.

[0013] The side restraint ring sealing plates are symmetrically arranged front and rear. The side restraint ring sealing plates are provided with side insert ribs on their inner side for inserting into the beam end installation gap. The side insert ribs are also provided with mortises above and below.

[0014] The U-shaped constraint cover plate with symmetrical upper and lower parts includes a side panel and a back cover plate. The inner side of the side panel is provided with a cover insert rib that inserts into the beam end installation gap, and the two ends form tenons that are connected to the mortise and tenon joint.

[0015] The central sealing steel plate penetrates and seals the central installation gap until it passes through the central shaft hole of the constraint ring sealing plates on both sides. One end is fixed with a limiting pad, and the other end is anchored and limited by a high-strength bolt and double nut pad assembly.

[0016] The inner frame plate is a rectangular inner frame plate with a vertical annular wing plate. Its outer wall is clearance-fitted with the inner wall of the steel box girder, and its inner wall matches the inner hole of the annular wing plate.

[0017] The side restraint ring sealing plate includes a fixing plate that fits onto the same side annular wing plate. The central hole on the fixing plate is a rectangular through hole, the height of which is adapted to the height of the annular wing plate, and the width of which is adapted to the sum of the thicknesses of the two annular wing plates and the central sealing steel plate.

[0018] The side insert rib extends inward along the inner wall of the central shaft hole, and its thickness is adapted to the width of the beam end installation gap. The end face abuts against the outer wall of the embedded part.

[0019] The U-shaped groove of the constraint cover plate is fastened to the top or bottom of the annular wing plate and the central sealing steel plate. The thickness of the cover rib is adapted to the installation gap at the beam end, and the end face abuts against the outer wall of the inner part.

[0020] The height of the central sealing steel plate is adapted to the height of the central shaft hole, the width of the limiting pad is greater than the width of the central shaft hole, and the bolt holes at the other end are arranged in a row.

[0021] The double nut pad assembly includes a pad and a nut. The thickness of the pad is greater than the thickness of the side insert rib. A high-strength bolt passes through the pad and is then locked by the nut.

[0022] The embedded part of the steel end plate is welded and fixed to the inner wall of the steel box girder.

[0023] Compared with the prior art, this utility model has the following features and beneficial effects:

[0024] 1. Eliminating welding operations: Construction quality is easier to control, eliminating fire hazards caused by welding operations on site, as well as problems affecting workers' health, ensuring pollution-free construction, and conforming to the concept of green environmental protection.

[0025] II. Modular prefabrication of node devices: All components can be produced in a standardized manner in the factory. The whole set of devices can form a system and integration, realize collaborative operation, and adopt integrated design, processing and assembly technology during the implementation phase to ensure the efficient application of the system.

[0026] III. Triple mechanical interlocking of the joint device to ensure structural safety: This device can improve the mechanical performance of the docking joint. The first level of constraint is the interlocking and embedding of the side rib and the cover rib, which suppresses the warping deformation of the box girder end. The second level of constraint is the meshing and locking of the tenon and mortise, which improves the shear resistance of the joint. The third level of constraint is the synergistic effect of the preload of the high-strength bolts, which improves the bending resistance of the joint.

[0027] IV. Rapid construction: Through the mortise and tenon guide positioning and bolt co-tightening, the bolts only need to be arranged in a single row, shortening the construction positioning time. Attached Figure Description

[0028] The present invention will now be described in further detail with reference to the accompanying drawings.

[0029] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0030] Figure 2 This is a three-dimensional structural diagram of the present invention from another angle.

[0031] Figure 3 yes Figure 1 A schematic diagram showing the structure where the steel box girder on one side is removed, revealing the connection between the surrounding steel restraint components and the embedded part.

[0032] Figure 4 This is an exploded three-dimensional structural diagram of the present invention.

[0033] Figure 5 This is a three-dimensional structural diagram of a beam with embedded restraining steel end plates.

[0034] Figure 6 This is a three-dimensional structural diagram showing the connection between the embedded restraint steel end plate and the steel box girder.

[0035] Figure 7 This is a top view of the structure, showing the beam end installation gap and the central installation gap formed after the steel box girders on both sides are connected by embedded restraint steel end plates.

[0036] Figure 8 This is a three-dimensional structural diagram showing the connection relationship between the constraint cover plate and the side constraint ring sealing plate.

[0037] Figure 9 yes Figure 8 A three-dimensional structural diagram showing the connection between the side constraint ring sealing plate on one side and the annular wing plate, and the sealing of the beam end installation gap.

[0038] Figure 10 yes Figure 9 A top-view structural diagram.

[0039] Figure 11 This is a three-dimensional structural diagram of the central sealing steel plate.

[0040] Figure 12 yes Figure 11 Schematic diagram of the three-dimensional structure after the central sealing steel plate is installed.

[0041] Figure 13 yes Figure 12 A top-view structural diagram.

[0042] Figure 14 yes Figure 12 A top view of the structure with the side constraint ring sealing plate removed.

[0043] Figure 15 yes Figure 12 A schematic diagram of the three-dimensional structure after the constraint cover plate is installed.

[0044] Figure 16 yes Figure 15 A three-dimensional structural diagram of the side constraint ring sealing plate installed on the other side.

[0045] Figure 17 yes Figure 16 A schematic diagram of the completed 3D structure.

[0046] Figure 18 yes Figure 17 A three-dimensional structural diagram of the assembly with high-strength bolts and a double-nut pad on one side.

[0047] Figure 19 yes Figure 18 A three-dimensional structural diagram of the double nut pad assembly on the other side.

[0048] Reference numerals: 1 - Steel box girder, 2 - Embedded restraint steel end plate, 21 - Embedded part, 22 - Annular wing plate, 23 - Stiffening plate, 24 - Vent hole, 3 - Beam end installation gap, 4 - Central installation gap, 5 - Side restraint ring sealing plate, 51 - Central shaft hole, 52 - Fixing plate, 53 - Side insert rib, 54 - Mortise, 6 - Restraint cover plate, 61 - Side panel plate, 62 - Back cover plate, 63 - Cover insert rib, 64 - Tenon, 7 - Central sealing steel plate, 71 - Limiting pad, 72 - Bolt hole, 73 - Main plate, 8 - High-strength bolt, 9 - Double nut pad assembly, 91 - Pad, 92 - Nut. Detailed Implementation

[0049] See the examples. Figure 1-7 As shown, a prefabricated connection node device for butt joints of steel box girders is described. (See also...) Figure 5-7 As shown, it includes two sets of symmetrically arranged beam-embedded restraint steel end plates 2. Each set includes an embedded part 21 that fits against the inner wall of the steel box girder 1 and an exposed annular wing plate 22. A beam end installation gap 3 is formed between the annular wing plate 22 and the end of the steel box girder 1. A central installation gap 4 is reserved between the two annular wing plates 22.

[0050] The embedded part 21 is a rectangular inner frame plate of a vertical annular wing plate 22. Its outer wall is clearance-fitted with the inner wall of the steel box girder 1, and its inner wall matches the inner hole of the annular wing plate 22. The embedded part 21 of the beam-embedded constraint steel end plate 2 is welded and fixed to the inner wall of the steel box girder 1. The connecting end of the steel box girder contacts the inner wall of the steel box girder 1 through the embedded part 21, constraining the relative displacement and rotation between the exposed annular wing plates 22, affecting the relative displacement and rotation of the embedded part, thereby restricting the relative displacement and rotation between the butt joints of the steel box girder connecting ends. A stiffening plate 23 is also provided inside the inner frame plate, and an exhaust hole 24 is opened in the center of the stiffening plate 23.

[0051] See Figure 8-10 As shown in Figure 16, the node device also includes symmetrically arranged side constraint ring sealing plates 5. The side constraint ring sealing plates 5 have side insert ribs 53 on their inner sides for inserting into the beam end installation gap 3. The side insert ribs 53 also have mortises 54 above and below them. The side constraint ring sealing plates 5 constrain the sides of the node.

[0052] The U-shaped constraint cover plate 6, which is symmetrically arranged on the top and bottom, includes a side plate 61 and a back cover plate 62. The inner side of the side plate 61 is provided with a cover rib 63 for inserting into the beam end installation gap 3. The two ends form tenons 64 and are mortised and tenoned with the groove 54. The constraint cover plate 6 constrains the top or bottom of the node and restricts the side constraint ring sealing plates 5 on both sides.

[0053] See Figure 11-15 As shown, the node device also includes a central sealing steel plate 7, which penetrates and seals the central installation gap 4 until it exits through the central shaft hole 51 of the side constraint ring sealing plates 5. One end is fixed with a limiting pad 71, and the other end is anchored and limited by a high-strength bolt 8 and a double-nut pad assembly 9. The double-nut pad assembly 9 includes a pad 91 and a nut 92. The thickness of the pad 91 is greater than the thickness of the side insert rib 53. The high-strength bolt 8 penetrates the pad 91 and is locked by the nut 92. The central sealing steel plate 7 completes the interlocking connection of the entire node.

[0054] The side restraint ring sealing plate 5 includes a fixing plate 52 that fits onto the same side annular wing plate 22. The central shaft hole 51 on the fixing plate 52 is a rectangular through hole, the height of which is adapted to the height of the annular wing plate 22, and the width is adapted to the sum of the thicknesses of the two annular wing plates 22 and the central sealing steel plate 7.

[0055] The side insert rib 53 extends inward along the inner wall of the central shaft hole 51, and its thickness is adapted to the width of the beam end installation gap 3. Its end face abuts against the outer wall of the embedded part 21.

[0056] See Figure 16-19 As shown, the height of the central sealing steel plate 73 is adapted to the height of the central shaft hole 51, the width of the limiting pad 71 is greater than the width of the central shaft hole 51, and the bolt holes 72 at the other end are arranged in a row.

[0057] The connection and fixing mechanisms between various components include interlocking, mortise and tenon joints, and bolt connections. The outer perimeter of the beam is constrained by a pre-reserved safety gap that tightens against the embedded part. The embedded constraint steel end plate, steel box girder, and central sealing steel plate are connected by interlocking side constraint ring seals, ensuring mutual clamping. The constraint cover plate is fixed to the side constraint ring seals on both sides through mortise and tenon joints. The anchor bolt node on one side of the central sealing steel plate serves as the final limiting device, ensuring the overall unit forms a complete unit. Within the unit body, the components are fixed by planing and clamping each other, mutually constraining and restricting each other to form a unit body, ensuring reliable constraint of the structural unit in all directions. The entire process employs prefabricated connections, avoiding welding operations.

[0058] The construction method and steps for this type of prefabricated connection node device for steel box girder butt joints are as follows:

[0059] Step 1: Based on the dimensions of the steel box girder 1 to be connected, design the dimensions of each component of the assembled connection node device for the steel box girder butt joint, and process them in the factory. The embedded restraint steel end plate 2 of the beam has been welded in advance.

[0060] Step 2: After the steel box girder 1 on one side is installed, the steel box girder 1 on the other side, which is to be installed, is hoisted into place.

[0061] Step 3: Install the side constraint ring sealing plate 5 on one side of the node, limit the two annular wing plates 22 on that side, and make the installation gap 3 at the beam end on that side tight.

[0062] Step 4: Insert the central sealing steel plate 7 to seal the central installation gap 4, and secure the limiting pad 71 to the outside of the side constraint ring sealing plate 5 in Step 3.

[0063] Step 5: Install the constraint cover plate 6 to make the top and bottom of the node tight. One end of the constraint cover plate 6 is mortised and tenoned with the side constraint ring sealing plate 5 in Step 3.

[0064] Step six: Install the side constraint ring sealing plate 5 on the other side of the node, limit the two annular wing plates 22 on this side and make the installation gap 3 at the beam end of this side tight, and at the same time limit the constraint cover plate 6, that is, the other end of the constraint cover plate 6 is mortised and tenoned with the side constraint ring sealing plate 5 in this step. At this time, the central sealing steel plate 7 passes through the central shaft hole 51 of the side constraint ring sealing plate 5 in this step and exposes the bolt hole 72. Thus, the installation gap between the nodes is tight and can transmit the load.

[0065] Step 8: Insert high-strength bolts 8 into bolt holes 72, and insert pads 91 through both ends and anchor them with nuts 92 to limit and fix the side constraint ring sealing plate 5, restricting the displacement between the components. The components interact and restrict each other under load, so that the components form an integral load-bearing unit. The steel box girder is connected, and the final beam-column joint assembly construction is completed.

Claims

1. A prefabricated connection node device for butt joints of steel box girders, characterized in that, include: Two sets of symmetrically arranged beams are embedded with steel end plates (2). Each set includes an embedded part (21) that fits against the inner wall of the steel box girder (1) and an exposed annular wing plate (22). A beam end installation gap (3) is formed between the annular wing plate (22) and the end of the steel box girder (1). A central installation gap (4) is reserved between the two annular wing plates (22). The side restraint ring sealing plate (5) is symmetrically arranged front and back. The side restraint ring sealing plate (5) has a side insert rib (53) on its inner side for inserting into the beam end installation gap (3). The side insert rib (53) also has a mortise (54) above and below. The U-shaped groove constraint cover plate (6) is symmetrically arranged on the top and bottom, including a side plate (61) and a back cover plate (62). The side plate (61) has a cover rib (63) for inserting into the beam end installation gap (3) on the inner side, and the two ends form tenons (64) and mortise and tenon joints with the groove (54). The central sealing steel plate (7) passes through and seals the central installation gap (4) until it passes through the central shaft hole (51) of the two side restraint ring sealing plates (5). One end is fixed with the limiting pad (71), and the other end is anchored and limited by the high-strength bolt (8) and the double nut pad assembly (9).

2. The assembled connection node device for steel box girder butt joints according to claim 1, characterized in that: The inner part (21) is a rectangular inner frame plate of the vertical annular wing plate (22), the outer wall of which is clearance-fitted with the inner wall of the steel box girder (1), and the inner wall is matched with the inner hole of the annular wing plate (22).

3. The assembled connection node device for steel box girder butt joints according to claim 1, characterized in that: The side restraint ring sealing plate (5) includes a fixing plate (52) that fits onto the same side annular wing plate (22). The central shaft hole (51) on the fixing plate (52) is a rectangular through hole with a height that matches the height of the annular wing plate (22) and a width that matches the sum of the thicknesses of the two annular wing plates (22) and the central sealing steel plate (7).

4. The assembled connection node device for steel box girder butt joints according to claim 3, characterized in that: The side insert rib (53) extends inward along the inner wall of the central shaft hole (51), and its thickness is adapted to the width of the beam end installation gap (3). Its end face abuts against the outer wall of the embedded part (21).

5. The assembled connection node device for steel box girder butt joints according to claim 1, characterized in that: The U-shaped groove of the constraint cover plate (6) is fastened to the top or bottom of the annular wing plate (22) and the central sealing steel plate (7). The thickness of the cover insert rib (63) is adapted to the beam end installation gap (3), and the end face abuts against the outer wall of the inner part (21).

6. The assembled connection node device for steel box girder butt joints according to claim 1, characterized in that: The height of the plate (73) of the central sealing steel plate (7) is adapted to the height of the central shaft hole (51), the width of the limiting pad (71) is greater than the width of the central shaft hole (51), and the bolt holes (72) at the other end are arranged in rows.

7. The assembled connection node device for steel box girder butt joints according to claim 6, characterized in that: The double nut pad assembly (9) includes a pad (91) and a nut (92). The thickness of the pad (91) is greater than the thickness of the side insert rib (53). The high-strength bolt (8) passes through the pad (91) and is then locked by the nut (92).

8. The assembled connection node device for steel box girder butt joints according to claim 1, characterized in that: The embedded part (21) of the embedded restraint steel end plate (2) of the beam is welded and fixed to the inner wall of the steel box girder (1).

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