A production process for steel structure bridges

Abstract

The present application discloses a production process for a steel structure bridge, which relates to the technical field of bridges and enables the jig to adapt to the support of more different types of box girders. It includes Step 1: manufacturing the box girder, placing the box girder top plate, web plate, side bottom plate and box girder bottom plate of the box girder on the jig for splicing and welding; Step 2: hoisting the box girder, hoisting the box girder onto the pier and connecting adjacent box girders. Among them, the jig in Step 1 includes a support, two support plates for supporting the box girder bottom plate are symmetrically arranged on the support, and an adjusting mechanism for adjusting the distance between adjacent support plates is further provided on the support; one end of each of the two support plates away from each other is hinged with a diagonal support plate for supporting the side bottom plate, and an accommodating cavity for supporting the box girder is formed between the two diagonal support plates and the support plates. Through the two adjustable support plates and diagonal support plates, the present application can adapt to the erection of box girders of different specifications.

Description

Technical Field

[0001] This application relates to the technical field of bridges, and particularly to a production process for steel structure bridges. Background Art

[0002] At present, a steel structure bridge refers to a bridge whose main load-bearing structure is made of steel, also known as a steel structure bridge. A steel structure bridge generally consists of bridge piers and multiple steel box girders erected on the bridge piers.

[0003] The steel box girder mainly consists of components such as a box girder top plate, a web plate, side bottom plates, and a box girder bottom plate, enclosing an inverted trapezoidal box cavity structure. The components are connected by welding technology. In engineering, a steel box girder often uses a jig as an external support, and then the box girder top plate, web plate, side bottom plates, and box girder bottom plate are placed on the jig for splicing and welding operations.

[0004] Since there are different models of steel box girders, the sizes of the box girder bottom plates and the inclination angles between the box girder bottom plates and the side bottom plates of different models are also different. Therefore, each time different models of steel box girders are assembled, different models of jigs need to be welded. Summary of the Invention

[0005] In order to enable the jig to support more different models of steel box girders, this application provides a production process for steel structure bridges.

[0006] This application provides a production process for steel structure bridges, adopting the following technical solutions:

[0007] A production process for steel structure bridges includes

[0008] Step 1: Fabrication of the box girder. Place the box girder top plate, web plate, side bottom plates, and box girder bottom plate of the box girder on the jig for splicing and welding;

[0009] Step 2: Hoist the box girder. Hoist the box girder onto the bridge pier and connect adjacent box girders;

[0010] Among them, the jig in Step 1 includes a support, on which two support plates for supporting the box girder bottom plate are symmetrically arranged. The support is also provided with an adjustment mechanism for adjusting the distance between adjacent support plates; at both ends of the two support plates away from each other, there are articulated inclined support plates for supporting the side bottom plates. An accommodation cavity for supporting the box girder is formed between the two inclined support plates and the support plates. A control member for adjusting the inclination angle of the inclined support plate is provided between the support plate and the inclined support plate; an auxiliary positioning mechanism is also provided on the inclined support plate, and the auxiliary positioning mechanism is used to drive the side bottom plate to abut against the inner wall of the inclined support plate.

[0011] By adopting the above technical solution, when erecting the box girder, the two support plates are adjusted to a suitable size by means of the adjusting mechanism, and then the bottom plate of the box girder is placed on the two support plates. Then, after adjusting the inclined support plate to the required angle by the control member, the inclined support plate is leaned against the inclined support plate, and the auxiliary positioning mechanism is used to make the side bottom plate abut against the inclined support plate, improving the stability of the side bottom plate. This solution enables the falsework to adapt to the erection of box girders of different sizes through adjustable inclined support plates and support plates.

[0012] Optionally, a hinge rod is fixedly connected to one end of the inclined support plate close to the support plate, and the end of the hinge rod away from the inclined support plate is hinged to the support plate.

[0013] By adopting the above technical solution, the inclined support plate forms a hinge with the support plate by means of the hinge rod, leaving a gap between the inclined support plate and the support plate, so that workers can weld the side bottom plate and the bottom plate of the box girder through this gap.

[0014] Optionally, the auxiliary positioning mechanism includes a mounting plate movably arranged above the inclined support plate and parallel to the inclined support plate. At least two guide rods are vertically connected to one end of the mounting plate close to the inclined support plate. Guide holes for the guide rods to pass through are formed in the inclined support plate, and the guide rods are inserted into the guide holes; an activity groove is formed on one side of the mounting plate facing the accommodation cavity, and an activity plate slidably connected in the activity groove is arranged on the mounting plate. A connecting rod is fixed to the side of the activity plate away from the accommodation cavity. A connecting hole communicating with the activity groove and for the connecting rod to extend out is formed on the side of the mounting plate away from the accommodation cavity. A first spring for driving the blocking block to drive the activity plate to move towards the inside of the activity groove is also arranged on the connecting rod; several clamping blocks extending towards the support plate are arranged at one end of the activity plate extending out of the activity groove.

[0015] By adopting the above technical solution, when the side bottom plate of the box girder abuts against the inclined support plate, the mounting plate is moved so that the activity plate on the mounting plate abuts against the upper end surface of the side bottom plate, and the clamping blocks press the side bottom plate tightly against the inclined support plate under the action of the first spring, thereby improving the stability of the side bottom plate during support.

[0016] Optionally, a groove is formed on the side of the activity plate facing the support plate, and a limiting block slidably connected in the groove is also arranged on the activity plate. A second spring for driving the limiting block to partially extend out of the groove is installed in the groove; when the limiting block extends out of the groove and abuts against the side of the mounting plate close to the accommodation cavity, the distance between the clamping block and the mounting plate is greater than the thickness of the side bottom plate.

[0017] By adopting the above technical solution, before use, the limiting block abuts against one side of the mounting plate under the action of the second spring, enabling the clamping block to be kept in the position to be clamped, and then the clamping block is released by the extrusion of the side bottom plate, and the operation process is relatively convenient.

[0018] Optionally, a mounting groove is provided on one side of the diagonal support plate close to the accommodating cavity, and the guide hole is connected to the mounting groove; a block is provided on the diagonal support plate and is slidably connected to the mounting groove; the block is used to support the guide rod so that the mounting plate is located away from the diagonal support plate; a through hole adapted to the guide rod is provided on the block; a third spring is installed in the mounting groove; the third spring pushes the block part to extend out of the surface of the diagonal support plate and staggers the through hole and the guide hole; when the block moves away from the side of the mounting groove to be flush with the surface of the diagonal support plate, the through hole is connected to the guide hole for the guide rod to pass through.

[0019] By adopting the above technical solution, the setting of the stop block can keep the mounting plate in the position to be installed. When the side bottom plate is placed on the diagonal support plate and the stop block is squeezed into the mounting groove, the mounting plate moves downward under the action of its own gravity, further improving the convenience of supporting the side bottom plate.

[0020] Optionally, an upwardly extending extension plate is fixed to one side of the diagonal support plate away from the accommodating cavity, and a mounting block is provided on the extension plate above the mounting plate; a fourth spring is provided between the mounting block and the mounting plate for driving the mounting plate to move toward the support plate.

[0021] By adopting the above technical solution, the provision of the fourth spring can provide the mounting plate with power to move toward the diagonal support plate.

[0022] Optionally, the adjustment mechanism includes a bidirectional screw and a motor; a guide groove is provided on the upper end surface of the support, the bidirectional screw is rotatably connected in the guide groove, a slider is fixed on the side of the support plate close to the support frame, the slider extends out of the guide groove and is threadedly connected to the bidirectional screw; the motor is fixedly mounted on the support; the output shaft of the motor is coaxially fixedly connected to the bidirectional screw.

[0023] By adopting the above technical solution, when the motor drives the bidirectional screw to rotate, the bidirectional screw moves the two sliders toward or away from each other, thereby adjusting the support range of the two support plates to adapt to box beam bottom plates of different sizes.

[0024] Optionally, the control member comprises a cylinder, the piston rod end of the cylinder is hinged to a side of the diagonal support plate away from the accommodating cavity, and the cylinder body is hinged to the support plate at one end away from the diagonal support plate.

[0025] By adopting the above technical solution and using a cylinder as a control component, the invention has the advantages of simple structure and stable force.

[0026] In summary, the present application includes at least one of the following beneficial effects:

[0027] 1. The present application can adapt to the erection of box girders of different specifications through two adjustable support plates and a diagonal bracing plate;

[0028] 2. By setting up the auxiliary positioning mechanism, the stability during the erection of the side bottom plate can be effectively improved. Description of the Drawings

[0029] Figure 1 is the overall structural schematic diagram of this embodiment;

[0030] Figure 2 is the exploded schematic diagram of this embodiment;

[0031] Figure 3 is the structural schematic diagram of the auxiliary positioning mechanism of this embodiment;

[0032] Figure 4 is the cross-sectional schematic diagram of the mounting plate of this embodiment;

[0033] Figure 5 is the structural schematic diagram showing the control member of this embodiment;

[0034] Figure 6 is the cross-sectional schematic diagram of the diagonal bracing plate of this embodiment;

[0035] Figure 7 is the cross-sectional schematic diagram showing the block protruding from the surface of the diagonal bracing plate of this embodiment.

[0036] Description of the Reference Numerals: 1, box girder; 11, box girder bottom plate; 12, side bottom plate; 2, support; 21, motor; 22, bidirectional lead screw; 23, guide groove; 3, support plate; 31, slider; 4, diagonal bracing plate; 41, hinge rod; 42, guide hole; 43, installation groove; 44, block; 441, through hole; 45, third spring; 46, extension plate; 47, mounting block; 48, fourth spring; 5, accommodation cavity; 6, control member; 7, auxiliary positioning mechanism; 71, mounting plate; 711, guide rod; 712, movable plate; 7121, first spring; 7122, blocking block; 7123, limiting block; 7124, second spring; 7125, connecting rod; 7126, groove; 713, movable groove; 714, clamping block; 715, connection hole. Detailed Embodiment

[0037] The following further describes the present application in detail with reference to the drawings.

[0038] The embodiment of the present application discloses a production process for a steel structure bridge.

[0039] The production process for a steel structure bridge includes the following steps:

[0040] Step 1: Fabrication of the box girder. Place the top plate, web, side bottom plate, and bottom plate of the box girder on the jig for splicing and welding.

[0041] Step 2: Lift and install the box girder. Lift the box girder onto the pier and connect adjacent box girders to complete the construction of the steel bridge.

[0042] Among them, referring to Figure 1 , 2 , the jig in Step 2 includes a support 2. There are two support plates 3 on the support 2 that are in the same horizontal plane. The two support plates 3 are parallel to each other, and the two support plates 3 jointly support the bottom plate 11 of the box girder. The support 2 is also provided with an adjustment mechanism. The adjustment mechanism is used to adjust the distance between adjacent support plates 3 to adapt to box girder bottom plates 11 of different sizes.

[0043] Referring to Figure 2 , the adjustment mechanism includes a bidirectional lead screw 22 and a motor 21. A guide groove 23 is opened on the upper end surface of the support 2. The bidirectional lead screw 22 is rotatably connected in the guide groove 23 through a bearing. The motor 21 is fixedly installed on the support 2; the output shaft of the motor 21 is coaxially and fixedly connected to the bidirectional lead screw 22. Sliders 31 are welded to the bottoms of the two support plates 3, and the two sliders 31 both extend into the guide groove 23 and are threadedly connected to the bidirectional lead screw 22. It should be noted here that the bidirectional lead screw 22 includes thread patterns on the left half and the right half that are opposite. The two sliders 31 are symmetrically distributed on the bidirectional lead screw 22. When the bidirectional lead screw 22 rotates, it can drive the two sliders 31 to move towards each other or away from each other. Referring to Figure 1 , hinge plates 4 are hinged to the upper end surfaces of the two support plates 3. An accommodation cavity 5 for supporting the box girder 1 is formed between the two hinge plates 4 and the support plates 3. The two hinge plates 4 are respectively used to support the two side bottom plates 12 connected to the bottom plate 11 of the box girder. Specifically, a hinge rod 41 is welded to the end of the hinge plate 4 close to the support plate 3. In this embodiment, the number of hinge rods 41 is two, and the two hinge rods 41 are respectively located at both ends of the support plate 3 in the length direction. The end of the hinge rod 41 away from the hinge plate 4 is hinged to the support plate 3 through a hinge seat, so that there is a gap between the hinge plate 4 and the support plate 3, allowing workers to connect the side bottom plate 12 and the bottom plate 11 of the box girder through this gap.

[0044] Referring to Figure 2 , 3 , a control member 6 is provided between the support plate 3 and the hinge plate 4. The control member 6 is used to adjust the inclination angle of the hinge plate 4 so that the hinge plate 4 can adapt to the processing of side bottom plates 12 with different inclination angles. Specifically, the control member 6 is a cylinder. The end of the piston rod of the cylinder is hinged to the side of the hinge plate 4 away from the accommodation cavity 5, and the cylinder block away from the hinge plate 4 is hinged to the support plate 3.

[0045] Referring toFigure 3 , 4 , an auxiliary positioning mechanism 7 is further provided on the diagonal bracing plate 4, and the auxiliary positioning mechanism 7 is used to drive the side bottom plate 12 to abut against the inner wall of the diagonal bracing plate 4.

[0046] The auxiliary positioning mechanism 7 includes a mounting plate 71. The mounting plate 71 is located above the diagonal bracing plate 4 and is parallel to the upper end surface of the diagonal bracing plate 4. At least two guide rods 711 are welded on the side of the mounting plate 71 facing the diagonal bracing plate 4. In this embodiment, two guide rods 711 are taken as an example for illustration. The two guide rods 711 are symmetrically arranged at both ends in the length direction of the mounting plate 71. A guide hole 42 adapted to the guide rod 711 is opened on the side of the diagonal bracing plate 4 away from the support plate 3. The guide rod 711 is inserted into the guide hole 42, so that the diagonal bracing plate 4 can move toward or away from the diagonal bracing plate 4 by means of the guide rod 711. The side of the mounting plate 71 close to the accommodating cavity 5 and the side of the diagonal bracing plate 4 close to the accommodating cavity 5 are in the same plane.

[0047] An activity groove 713 is opened on the side of the mounting plate 71 close to the accommodating cavity 5. An activity plate 712 slidably connected in the activity groove 713 is provided on the mounting plate 71. A plurality of clamping blocks 714 spaced along the length direction of the activity plate 712 are welded at one end of the activity plate 712 extending out of the activity groove 713. The clamping blocks 714 are parallel to the diagonal bracing plate 4 and extend toward the support plate 3. A connecting rod 7125 is welded at the end of the activity plate 712 away from the accommodating cavity 5. A connecting hole 715 communicating with the activity groove 713 and for the connecting rod 7125 to extend out is opened on the side of the mounting plate 71 away from the accommodating cavity 5. A first spring 7121 is sleeved on the part of the connecting rod 7125 extending out of the activity groove 713, and a blocking block 7122 is threadedly connected to the end of the connecting rod 7125 away from the mounting plate 71. One end of the first spring 7121 abuts against the blocking block 7122, and the other end abuts against the side of the mounting plate 71 away from the accommodating cavity 5. Without external force, the first spring 7121 pushes the blocking block 7122 to drive the activity plate 712 to move toward the inside of the activity groove 713, so that the clamping blocks 714 can clamp and hold the side bottom plate 12 tightly on the diagonal bracing plate 4.

[0048] Refer to Figure 4 , 5A groove 7126 is provided on the side of the movable plate 712 facing the support plate 3, and a stopper 7123 is provided on the movable plate 712 to be slidably connected to the groove 7126. A second spring 7124 is installed in the groove 7126, and one end of the second spring 7124 is fixedly connected to the groove bottom of the groove 7126, and the other end is fixedly connected to the stopper 7123. Under the action of the second spring 7124, the stopper 7123 will partially extend out of the groove 7126 and abut against the side of the mounting plate 71 close to the accommodating cavity 5 to fix the movable plate 712, and at this time, the distance between the clamping block 714 and the mounting plate 71 is greater than the thickness of the side bottom plate 12. When the side bottom plate 12 of the box beam 1 is against the diagonal support plate 4, the mounting plate 71 is moved downward, and the diagonal support plate 4 enters between the clamping block 714 and the mounting plate 71, and the limit block 7123 is pushed into the groove 7126, and the clamping block 714 clamps the side bottom plate 12 of the box beam 1 under the action of the first spring 7121.

[0049] Reference Figure 6 , 7 The side of the diagonal support plate 4 close to the accommodating cavity 5 is provided with a mounting groove 43, and the mounting groove 43 is located at the end of the diagonal support plate 4 away from the supporting plate 3. The guide hole 42 is connected with the mounting groove 43, and the diagonal support plate 4 is provided with a stopper 44 slidably connected in the mounting groove 43, and the stopper 44 blocks the sliding path of the guide rod 711. The stopper 44 is provided with a through hole 441 adapted to the guide rod 711. When the stopper 44 moves to the side close to the accommodating cavity 5 and is in the same plane as the side of the diagonal support plate 4 close to the accommodating cavity 5, the through hole 441 and the guide hole 42 are in a coaxial position, and the guide rod 711 can slide downward through the through hole 441.

[0050] The diagonal support plate 4 is located in the installation groove 43 and is further provided with a third spring 45, one end of which is connected to the stopper 44, and the other end of which is connected to the bottom of the installation groove 43. In the absence of external force, the third spring 45 drives the stopper 44 to partially extend out of the surface of the diagonal support plate 4, and causes the through hole 441 to be offset from the guide hole 42, so as to prevent the guide rod 711 from falling.

[0051] Reference Figure 5 An extension plate 46 extending in a direction away from the support plate 3 is welded on the side of the diagonal support plate 4 away from the accommodating cavity 5. The extension plate 46 is provided with a mounting block 47 above the mounting plate 71. A fourth spring 48 is provided between the mounting block 47 and the mounting plate 71. One end of the fourth spring 48 is connected to the mounting plate 71, and the other end is connected to the mounting block 47. The fourth spring 48 can drive the mounting plate 71 to move toward one side of the diagonal support plate 4, and enable the side bottom plate 12 of the box beam 1 on the diagonal support plate 4 to push the limit block 7123 into the groove 7126 to release the fixation of the clamping block 714.

[0052] The implementation principle of a steel structure bridge production process in the embodiment of the present application is:

[0053] When manufacturing the box girder 1, start the motor 21, adjust the two support plates 3 to the required size, place the box girder bottom plate 11 on the two support plates 3, then adjust the inclined support plate 4 to the required angle through the cylinder, and lean the side bottom plate 12 of the box girder 1 against the inner wall of the inclined support plate 4. When the side bottom plate 12 of the box girder 1 leans against the inclined support plate 4, it will squeeze the stop block 44 on the inclined support plate 4, causing the stop block 44 to move into the installation groove 43 until it is flush with the surface of the inclined support plate 4. At this time, the through hole 441 is communicated with the guiding hole 42, and the guiding rod 711 and the mounting plate 71 move towards the inclined support plate 4 under the action of their own gravity and the fourth spring 48. When the movable plate 712 on the mounting plate 71 contacts the upper end surface of the side bottom plate 12 of the box girder 1, the limiting block 7123 on the movable plate 712 is squeezed by the side bottom plate 12 of the box girder 1 and will be received into the groove 7126, enabling the movable plate 712 to, under the action of the first spring 7121, drive the clamping block 714 to tightly press the side bottom plate 12 against the inclined support plate 4, improving the stability when the inclined support plate 4 is erected.

[0054] The above are all the preferred embodiments of this application, and the protection scope of this application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of this application shall be covered within the protection scope of this application.

Claims

1. A production process for a steel structure bridge, characterized in that: Including Step 1: Fabrication of the box girder (1). Place the top plate, web, side bottom plate (12) and bottom plate (11) of the box girder (1) on the jig for splicing and welding; Step 2: Lift and install the box girder (1). Lift the box girder (1) onto the pier and connect adjacent box girders (1); Among them, the jig in Step 1 includes a support (2). Two support plates (3) for supporting the bottom plate (11) of the box girder are symmetrically arranged on the support (2). The support (2) is also provided with an adjusting mechanism for adjusting the distance between adjacent support plates (3); One end of each of the two support plates (3) away from each other is hinged with a diagonal support plate (4) for supporting the side bottom plate (12). An accommodating cavity (5) for supporting the box girder (1) is formed between the two diagonal support plates (4) and the support plate (3). A control member (6) for adjusting the inclination angle of the diagonal support plate (4) is provided between the support plate (3) and the diagonal support plate (4); An auxiliary positioning mechanism (7) is also provided on the diagonal support plate (4). The auxiliary positioning mechanism (7) is used to drive the side bottom plate (12) to abut against the inner wall of the diagonal support plate (4); The auxiliary positioning mechanism (7) includes a mounting plate (71) movably arranged above the diagonal support plate (4) and parallel to the diagonal support plate (4). At least two guide rods (711) are vertically connected to one end of the mounting plate (71) close to the diagonal support plate (4). A guide hole (42) for the guide rod (711) to pass through is formed on the diagonal support plate (4). The guide rod (711) is inserted into the guide hole (42); An activity groove (713) is formed on one side of the mounting plate (71) facing the accommodating cavity (5). The mounting plate (71) is provided with an activity plate (712) slidably connected in the activity groove (713). A connecting rod (7125) is fixed to one side of the activity plate (712) away from the accommodating cavity (5). A connecting hole (715) communicating with the activity groove (713) and for the connecting rod (7125) to extend out is formed on one side of the mounting plate (71) away from the accommodating cavity (5). A first spring (7121) for driving a blocking block (7122) to drive the activity plate (712) to move towards the inside of the activity groove (713) is also provided on the connecting rod (7125); A number of clamping blocks (714) extending towards the support plate (3) are provided at one end of the activity plate (712) extending out of the activity groove (713); A groove (7126) is formed on one side of the activity plate (712) facing the support plate (3). The activity plate (712) is also provided with a limiting block (7123) slidably connected in the groove (7126). A second spring (7124) for driving the limiting block (7123) to partially extend out of the groove (7126) is installed in the groove (7126); When the limiting block (7123) extends out of the groove (7126) and abuts against one side of the mounting plate (71) close to the accommodating cavity (5), the distance between the clamping block (714) and the mounting plate (71) is greater than the thickness of the side bottom plate (12).

2. The production process of a steel structure bridge according to claim 1, characterized in that: One end of the diagonal support plate (4) close to the support plate (3) is fixedly connected to a hinge rod (41), and one end of the hinge rod (41) away from the diagonal support plate (4) is hinged to the support plate (3).

3. A production process for a steel structure bridge according to claim 1, characterized in that: A mounting groove (43) is provided on a side of the diagonal support plate (4) close to the accommodating cavity (5), and the guide hole (42) is communicated with the mounting groove (43); a stopper (44) is provided on the diagonal support plate (4) and is slidably connected to the mounting groove (43); the stopper (44) is used to support the guide rod (711) so that the mounting plate (71) is located away from the diagonal support plate (4); a through hole (441) adapted to the guide rod (711) is provided on the stopper (44); a third spring (45) is installed in the mounting groove (43); the third spring (45) pushes the stopper (44) to partially extend out of the surface of the diagonal support plate (4) and causes the through hole (441) to be staggered with the guide hole (42); when the side of the stopper (44) away from the mounting groove (43) moves to be flush with the surface of the diagonal support plate (4), the through hole (441) is communicated with the guide hole (42) so that the guide rod (711) can pass through.

4. A production process of a steel structure bridge according to claim 3, characterized in that: An extension plate (46) extending upward is fixed to a side of the diagonal support plate (4) away from the accommodating cavity (5); a mounting block (47) is provided on the extension plate (46) above the mounting plate (71); and a fourth spring (48) is provided between the mounting block (47) and the mounting plate (71) for driving the mounting plate (71) to move towards the support plate (3).

5. The production process of a steel structure bridge according to claim 1, characterized in that: The adjustment mechanism comprises a bidirectional lead screw (22) and a motor (21); a guide groove (23) is provided on the upper end surface of the support (2), the bidirectional lead screw (22) is rotatably connected to the guide groove (23), a slider (31) is fixed to a side of the support plate (3) close to the support frame, the slider (31) extends out of the guide groove (23) and is threadedly connected to the bidirectional lead screw (22); the motor (21) is fixedly mounted on the support (2); and an output shaft of the motor (21) is coaxially and fixedly connected to the bidirectional lead screw (22).

6. The production process of a steel structure bridge according to claim 1, characterized in that: The control member (6) comprises a cylinder, the piston rod end of the cylinder is hinged to a side of the diagonal support plate (4) away from the accommodating chamber (5), and the cylinder body of the cylinder is hinged to the support plate (3) at one end away from the diagonal support plate (4).

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