A slip-form construction device for a bridge girder

Abstract

The utility model discloses a kind of sliding construction devices for bridge girder, comprising: slide support mechanism, it is set below the two sides of bridge girder design position;Distribution beam, it is spaced apart in the slide support mechanism above along bridge transverse direction;Slide, it is set in the distribution beam above along longitudinal bridge direction;Slide shoe, it can match on the slide sliding;Traction mechanism, it is set in the beginning of slide, can match with the rear end of slide shoe detachable connection;Pull mechanism, it includes counterforce seat and pull jack, the counterforce seat is set in the end of slide, the pull jack is fixed in counterforce seat side, its steel strand can match through slide shoe.Sliding construction device of the utility model can solve the problem of bridge girder river-crossing construction under narrow terrain environment.

Description

Technical Field

[0001] This invention relates to the field of bridge construction technology, and in particular to a sliding construction device for bridge main beams. Background Technology

[0002] With the rapid development of infrastructure construction and the increasing awareness of the public, environmental and ecological issues in the construction industry are receiving more and more attention. Bridge construction, as a crucial component of infrastructure, must further meet the demands of green construction and sustainable development. To reduce the environmental impact of bridge construction, most bridge main beams are currently prefabricated in multiple segments, manufactured in a prefabrication plant, and then transported to the construction site for installation. This method effectively increases construction speed, reduces environmental pollution, and promotes standardized bridge construction, thereby improving bridge quality.

[0003] For the installation of precast bridge main girder segments, the more mature technologies currently used are the incremental launching method and the cable hoisting method. The incremental launching method involves assembling the steel box girder behind the abutment and then using horizontal jacks to push it segment by segment to the design position. However, the incremental launching method requires close-range pier support, has high construction costs, and is not suitable for large-span river crossing construction. The cable hoisting method is a construction method that uses a cable system to hoist the precast main girder segments to the bridge position one by one. This system consists of a main cable, working cables, towers, and anchoring devices. The main cable is used to bear the load and provide a sliding track. However, in some terrains with limited space, it is difficult to build towers and anchor them, making the method difficult to implement.

[0004] Therefore, it is essential to find a main beam construction device suitable for installation across rivers in narrow terrain environments. Utility Model Content

[0005] This utility model discloses a sliding construction device for bridge main beams, which can solve the problem of bridge main beams crossing rivers in narrow terrain environments.

[0006] To solve the above problems, the technical solution of this utility model is as follows: A sliding construction device for bridge main beams, comprising: The slide support mechanism is located on both sides below the designed position of the main beam of the bridge; Distribution beams are spaced along the transverse direction on the slide support mechanism; A slide, which is arranged along the longitudinal direction of the bridge on the distribution beam; A sliding shoe that can slide on the track; A traction mechanism is provided at the beginning of the slide and can be detachably connected to the rear end of the skid. The pulling mechanism includes a reaction seat and a pulling jack. The reaction seat is located at the end of the slide, and the pulling jack is fixed to one side of the reaction seat. Its steel strand can pass through the slide shoe and pull the slide shoe to slide towards the end of the slide.

[0007] Preferably, the sliding shoe includes a sliding shoe base, a sliding shoe support block, and a lifting jack. The sliding shoe base has a sleeve through which the steel strand passes along the sliding direction. Sliding shoe support blocks are symmetrically arranged on both sides of the base. The sliding shoe support blocks are arranged along the bridge direction. The lifting jack is arranged between two sliding shoe support blocks. When the piston rod of the lifting jack retracts, it is lower than the height of the sliding shoe support block. When it is lifted, it is higher than the height of the sliding shoe support block.

[0008] More preferably, the skateboard further includes a limiting plate and a limiting connecting plate. At least two limiting plates are provided at intervals in the middle of the left and right sides of the skateboard base. The limiting plates extend to the bottom of the skateboard base. The inner side of the portion of the limiting plate on the same side extending to the bottom of the skateboard base is connected to the limiting connecting plate. The distance between the limiting connecting plates on the left and right sides can be matched to insert into the slide rail.

[0009] More preferably, the skid also includes a mounting plate, a mounting connecting plate, and an adjustment jack. At least two mounting plates are provided at both ends of the left and right sides of the skid base. The mounting plates extend to the bottom of the skid base. The inner side of the portion of the mounting plate extending to the bottom of the skid base on the same side is connected to the mounting connecting plate. An adjustment jack is fixed to the inner side of the mounting connecting plate. The adjustment jack can extend to press against the slide rail.

[0010] More preferably, the slipper base is provided with at least two base partitions along the bridge direction, wherein two of the base partitions clamp the sleeve; The slipper support block is provided with at least two support block partitions along the bridge direction. The support block partitions correspond one-to-one with the base partitions and are located directly above the base partitions.

[0011] Preferably, the slide support mechanism includes piers, crossbeams, and longitudinal beams. The piers are respectively arranged on the left and right sides below the main beam of the bridge, with at least two on each side. Each pier is fixedly connected to at least two crossbeams arranged along the transverse direction of the bridge. The crossbeams on the same side are connected to the longitudinal beams, which are constructed of Bailey panels and are arranged in at least three rows.

[0012] More preferably, the pier includes a pier foundation, columns, and transverse connections. The columns are fixedly connected to the pier foundation, the transverse connections are connected between the middle parts of the columns, and the crossbeams are connected between the tops of the columns arranged along the transverse bridge direction.

[0013] More preferably, the diagonal brace connects the crossbeam and the column near its outer end.

[0014] Preferably, a construction walkway is fixed between the distribution beam and the slide, and guardrails are provided on both sides of the construction walkway.

[0015] More preferably, a polytetrafluoroethylene (PTFE) sliding plate is also placed between the slide and the sliding shoe.

[0016] The sliding construction device for bridge main beams described above is used as follows: the sliding shoe is held at the beginning of the sliding track by the action of steel strands and traction components. The main beam segment is hoisted onto the sliding shoe using a hoisting device and its position is adjusted. Then, the connection between the traction component and the sliding shoe is released, and the traction jack is controlled to pull the sliding shoe, causing the sliding shoe to slide the main beam segment towards the end of the sliding track. When it reaches directly below the designed position of the main beam segment, the main beam segment is lifted upwards to reach the designed position and fixedly connected to the already installed main beam segment. After the above main beam segments are installed, the above steps are repeated until the installation of all main beam segments is completed.

[0017] This utility model has the following advantages: (1) This utility model solves the problem that the main beam segment cannot be installed in water by using cable hoisting in narrow spaces by using a combination of slip shoes and slides to drive the main beam segment to the design position.

[0018] (2) By setting the reaction frame and traction mechanism on the sliding track, the traction force is transformed from external force to internal force, which can reduce the horizontal force on the support and reduce the material of the support.

[0019] (3) The present invention further provides a lifting jack on the sliding shoe, which facilitates the adjustment of the vertical position of the main beam segment and reduces the difficulty of adjusting the position of the main beam segment. In addition, the present invention further provides a correction jack at the bottom of the sliding shoe, which facilitates the adjustment of the left and right deviation of the sliding shoe, and can better guide the main beam segment to the design position and reduce the slip deviation. Attached Figure Description

[0020] Figure 1 This is a structural schematic diagram of an embodiment of the present invention applied during the construction of a bridge main beam.

[0021] Figure 2 This is a schematic diagram of the left-side structure of one of the pier locations.

[0022] Figure 3 This is a structural diagram of one of the slide support mechanisms, distribution beams, and slide connections.

[0023] Figure 4 This is a schematic diagram of the structure connecting the reaction seat, the traction jack, and the sliding shoe.

[0024] Figure 5 This is a schematic diagram of the connection between the traction mechanism and the slipper.

[0025] Figure 6 This is an enlarged structural diagram of the skate.

[0026] Figure 7 yes Figure 6 A schematic diagram of the left-side view structure.

[0027] Figure 8 This is a structural diagram of the skates and the track.

[0028] Figure 9 This is a structural diagram of a lifting jack lifting a segment of the main beam.

[0029] Figure 10 This is a structural diagram showing the first steel plate placed on top after the lifting jack lifts the main beam segment.

[0030] In the diagram, the components are: 1. Pier foundation; 2. Longitudinal beam; 3. Column; 4. Main beam segment; 5. Slide shoe; 501. Slide shoe support block; 502. Slide shoe base; 503. Sleeve; 504. Mounting plate; 505. Mounting connection plate; 506. Limiting connection plate; 507. Base partition plate; 508. Support block partition plate; 509. Adjustment jack; 510. Slide rail; 6. Construction walkway; 7. Distribution beam; 8. Crossbeam; 9. Diagonal brace; 10. Horizontal connection; 11. Pulling jack; 12. Steel strand; 1201. Reaction seat; 13. Lifting jack; 14. Traction mechanism; 15. Slide plate; 16. First steel plate; 17. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0032] In the description of this utility model, it should be noted that the terms "upper", "lower", "left", "right", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0033] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0034] In this embodiment, the left and right are defined by the relative positions of the left and right spans of the bridge.

[0035] A sliding construction device for bridge main beams, such as Figure 1 As shown, it includes a slide support mechanism, a distribution beam 8, a slide 6, a slide shoe 5, a traction mechanism, and a pulling mechanism, wherein: combined with Figure 2-3 As shown, the slide support mechanism is located on both sides below the designed position of the main beam of the bridge; the distribution beam 8 is spaced along the transverse direction on the slide support mechanism; the slide 6 is located along the longitudinal direction on the distribution beam 8, and the load borne by the slide 6 can be evenly transferred to the slide support mechanism through the distribution beam 8; the slide shoe 5 can slide on the slide 6; the traction mechanism is located at the beginning of the slide 6 and can be detachably connected to the rear end of the slide shoe 5; the pulling mechanism includes a reaction seat 13 and a pulling jack 12. The reaction seat 13 is located at the end of the slide 6, and the pulling jack 12 is fixed to one side of the reaction seat 13. Its steel strand can pass through the slide shoe 5 and pull the slide shoe 5 to slide towards the end of the slide 6.

[0036] The above structure is applied to the construction of one type of bridge main girder, combined with Figure 1 As shown, the bridge in this embodiment is a land area on the east side and crosses a river on the west side. The terrain on the east side is narrow and it is impossible to build a tower. The main beam of the bridge on the east side can be installed by in-situ hoisting. The main beam of the bridge on the west side can be constructed using the above-mentioned sliding device. The sliding support mechanism is installed below the main beam of the bridge on the west side. The specific construction process is as follows: (1) The sliding shoe 5 stops at the beginning of the sliding track 6 by the action of the steel strand 1201 and the traction component. The main beam segment 4 is hoisted onto the sliding shoe 5 by the hoisting device and the position is adjusted. Then the connection between the traction component and the sliding shoe 5 is released, and the traction jack 12 is controlled to pull the sliding shoe 5 so that the sliding shoe 5 drives the main beam segment 4 to slide towards the end of the sliding track 6. When it reaches the design position of the main beam segment 4, the main beam segment 4 is lifted upward to reach the design position and fixedly connected with the main beam segment 4 that has been installed. (2) After the main beam segment 4 is installed, the traction component is connected to the sliding shoe 5, and step (1) is repeated until all the main beam segments 4 are installed.

[0037] In this embodiment, two slides are provided, and two sliding shoes 5 are matched on each slide 6. The sliding shoes 5 are respectively located on the left or right side of the main beam segment 4 near the front end and near the rear end to maintain the balance of the entire main beam segment 4. The steel strand 1201 passes through the two sliding shoes 5 in sequence. Clamps are provided on the side of the sliding shoe 5 away from the traction jack 12 to anchor the steel strand 1201. Since the clamps are located on the side away from the traction jack 12, in step (2), after the main beam segment 4 is hoisted onto the sliding shoe 5 and its position is adjusted, the connection with the traction component is released. This allows the two sliding shoes 5 to maintain a suitable distance. After the main beam segment 4 falls on the sliding shoe 5, the distance between the two sliding shoes 5 is not easily changed under the gravity of the main beam segment 4.

[0038] In this embodiment, the slide 6 is made of three I45 I-beams welded together, the distribution beam 8 is made of I20 I-beams with a spacing of 0.5-0.6m, the traction jack 12 is a 50t continuous jack, the traction mechanism 15 is a winch, and the traction component is a steel wire rope.

[0039] Preferably, due to the large self-weight of the main beam segment 4, this embodiment provides a slipper 5 structure for convenient adjustment of the vertical position of the main beam segment 4. Combined with... Figure 6-8 As shown, the sliding shoe 5 includes a sliding shoe base 502, a sliding shoe support block 501, and a lifting jack 14. In this embodiment, the sliding shoe base 502 has a sleeve 503 through which the steel strand 1201 passes along the sliding direction. Sliding shoe support blocks 501 are symmetrically arranged on both sides of the base, and are arranged along the bridge direction. Both the sliding shoe base 502 and the sliding shoe support block 501 are box-shaped structures made of steel plates, and the sleeve 503 is a hollow steel pipe for easy processing. A lifting jack 14 is arranged between the two sliding shoe support blocks 501. The lifting jack 14 is supported by the sliding shoe base 502. When the piston rod of the lifting jack 14 retracts, it is lower than the height of the sliding shoe support block 501; when lifting, it is higher than the height of the sliding shoe support block 501. Based on the above structure of the sliding shoe 5, lifting the main beam segment 4 upwards to reach the designed position 4 specifically includes: combining... Figure 9 As shown, the main beam segment 4 is lifted upwards by jack 14, combined with... Figure 10 As shown, a first steel plate 17 is placed in the vertical space between the main beam segment 4 and the slipper support block 501. Then, the lifting jack 14 is retracted, and a second steel plate is placed at the bottom of the lifting jack 14. After the position of the lifting jack 14 is adjusted, the lifting jack 14 is controlled to lift the main beam segment 4 upward. The first steel plate 17 is placed in the vertical space between the first steel plate 17 and the main beam segment 4. The above steps of placing the second steel plate, lifting the lifting jack 14, and placing the first steel plate 17 are repeated until the main beam segment 4 is lifted to the design elevation.

[0040] Preferably, combined with Figure 6-8 As shown, the skate 5 also includes a limiting plate 506 and a limiting connecting plate 507. At least two limiting plates 506 are provided at intervals in the middle of the left and right sides of the skate base 502. The limiting plates 506 extend to the bottom of the skate base 502. The inner side of the portion of the limiting plate 506 on the same side extending to the bottom of the skate base 502 is connected to the limiting connecting plate 507. The distance between the limiting connecting plates 507 on the left and right sides can be matched to insert into the slide rail 6, so as to a certain extent prevent the skate 5 from shifting left and right on the slide rail 6.

[0041] Furthermore, to facilitate adjustment of the horizontal position of the sliding shoe 5, the sliding shoe 5 also includes a mounting plate 504, a mounting connecting plate 505, and an adjustment jack 510. At least two mounting plates 504 are provided at both ends of the left and right sides of the sliding shoe base 502. The mounting plates 504 extend below the sliding shoe base 502. The inner side of the portion of the mounting plate 504 extending below the sliding shoe base 502 on the same side is connected to the mounting connecting plate 505. An adjustment jack 510 is fixed inside the mounting connecting plate 505. Figure 8 As shown, the lateral adjustment jack 510 can extend to abut the slide rail 6. In this embodiment, lateral adjustment jacks 510 are provided at the four corners of the bottom of the slide shoe 5. By extending or retracting the lateral adjustment jacks 510 at each corner, the left and right offset of the slide shoe 5 can be adjusted. Based on the structure of the slide shoe 5, if the lateral deviation of the slide shoe 5 exceeds the threshold during the process of the traction jack 12 pulling the slide shoe 5 to drive the main beam segment 4 to slide, the traction of the traction jack 12 is temporarily stopped. The lateral deviation of the slide shoe 5 is adjusted by extending and retracting the lateral adjustment jack 510 to reach the design axis, and then the traction is restarted. The setting of the lateral adjustment jack 510 greatly improves the convenience of adjusting the position of the slide shoe 5.

[0042] More preferably, to ensure the support strength of the slipper 5, the slipper base 502 is provided with at least two base partitions 508 along the bridge direction, two of which clamp the sleeve 503; the slipper support block 501 is provided with at least two support block partitions 509 along the bridge direction, the support block partitions 509 corresponding one-to-one with the base partitions 508 and located directly above the base partitions 508. By adding the base partitions 508 and the support block partitions 509, the concave deformation of the middle part of the slipper 5 can be effectively prevented.

[0043] More preferably, this embodiment provides a more specific slide support mechanism, which includes piers, crossbeams 9, and longitudinal beams 2. The piers are respectively arranged on the left and right sides below the main beam of the bridge, with at least two on each side. Each pier is fixedly connected to at least two crossbeams 9 arranged along the transverse direction of the bridge. The crossbeams 9 on the same side are connected to longitudinal beams 2, which are constructed of Bailey bridge panels and have at least three rows. In this embodiment, the crossbeams are made of double-section H700*300 steel or triple-section I45 I-beams, and the Bailey bridge panels are arranged in four rows.

[0044] More preferably, combined with Figure 2-3 As shown, the pier includes a pier foundation 1, columns 3, horizontal connectors 11, and diagonal braces 10. The pier foundation 1 can utilize existing arch rib support foundations, while concrete-concrete composite steel pipe pile foundations can be used in locations closer to land. Figure 1 The leftmost pier foundation 1 has columns 3 fixedly connected to it. A transverse connector 11 connects the middle sections of the columns 3, and a crossbeam 9 is connected to the top. The crossbeam 9 is arranged along the transverse direction of the bridge, with one crossbeam 9 matched for every two transversely arranged columns 3. A diagonal brace 10 connects the crossbeam 9 to the column 3 near its outer end. The transverse connector 11 improves the overall integrity and support rigidity of the pier, while the crossbeam 9 allows the load of the longitudinal beam 2 to be more evenly distributed to the pier. This embodiment employs a stable sliding support mechanism, ensuring the safety of the bridge main beam sliding construction.

[0045] The foregoing description of specific exemplary embodiments of the present invention is for illustrative and explanatory purposes. These descriptions are not intended to limit the present invention to the precise forms disclosed, and it will be apparent that many changes and variations can be made in accordance with the foregoing teachings. The exemplary embodiments were chosen and described in order to explain the specific principles of the present invention and its practical application, thereby enabling those skilled in the art to implement and utilize various different exemplary embodiments of the present invention, as well as various different choices and variations. The scope of the present invention is intended to be defined by the claims and their equivalents.

Claims

1. A sliding construction device for bridge main beams, characterized in that... include: The slide support mechanism is located on both sides below the designed position of the main beam of the bridge; Distribution beams are spaced along the transverse direction on the slide support mechanism; A slide, which is arranged along the longitudinal direction of the bridge on the distribution beam; A sliding shoe that can slide on the track; A traction mechanism is provided at the beginning of the slide and can be detachably connected to the rear end of the skid. The pulling mechanism includes a reaction seat and a pulling jack. The reaction seat is located at the end of the slide, and the pulling jack is fixed to one side of the reaction seat. Its steel strand can pass through the slide shoe and pull the slide shoe to slide towards the end of the slide.

2. The sliding construction device for bridge main beams according to claim 1, characterized in that: The sliding shoe includes a sliding shoe base, a sliding shoe support block, and a lifting jack. The sliding shoe base has a sleeve through which the steel strand passes along the sliding direction. Sliding shoe support blocks are symmetrically arranged on both sides of the base. The sliding shoe support blocks are arranged along the bridge direction. The lifting jack is located between two sliding shoe support blocks. When the piston rod of the lifting jack retracts, it is lower than the height of the sliding shoe support block. When it is lifted, it is higher than the height of the sliding shoe support block.

3. The sliding construction device for bridge main beams according to claim 2, characterized in that: The skate also includes a limiting plate and a limiting connecting plate. At least two limiting plates are spaced apart in the middle of the left and right sides of the skate base. The limiting plates extend to the bottom of the skate base. The inner side of the portion of the limiting plate on the same side extending to the bottom of the skate base is connected to the limiting connecting plate. The distance between the limiting connecting plates on the left and right sides can be matched to insert into the slide rail.

4. The sliding construction device for bridge main beams according to claim 2 or 3, characterized in that: The sliding shoe also includes a mounting plate, a mounting connecting plate, and an adjustment jack. At least two mounting plates are provided at both ends of the left and right sides of the sliding shoe base. The mounting plates extend to the bottom of the sliding shoe base. The inner side of the part of the mounting plate on the same side that extends to the bottom of the sliding shoe base is connected to the mounting connecting plate. An adjustment jack is fixed to the inner side of the mounting connecting plate. The adjustment jack can extend to press against the slide rail.

5. The sliding construction device for bridge main beams according to claim 2, characterized in that: The slipper base is provided with at least two base partitions along the bridge direction, two of which clamp the sleeve; The slipper support block is provided with at least two support block partitions along the bridge direction. The support block partitions correspond one-to-one with the base partitions and are located directly above the base partitions.

6. The sliding construction device for bridge main beams according to claim 1, characterized in that: The slide support mechanism includes piers, crossbeams, and longitudinal beams. The piers are respectively set on the left and right sides below the main beam of the bridge, with at least two on each side. Each pier is fixedly connected to at least two crossbeams arranged along the transverse direction of the bridge. The crossbeams on the same side are connected to the longitudinal beams, which are constructed of Bailey panels and are arranged in at least three rows.

7. The sliding construction device for bridge main beams according to claim 6, characterized in that: The pier includes a pier foundation, columns, and transverse connections. The columns are fixedly connected to the pier foundation, and the transverse connections are connected between the middle parts of the columns. The tops of the columns arranged along the transverse bridge direction are connected by the crossbeams.

8. The sliding construction device for bridge main beams according to claim 7, characterized in that: A diagonal brace connects the crossbeam and the column near its outer end.

9. The sliding construction device for bridge main beams according to claim 1, characterized in that: A construction walkway is also fixed between the distribution beam and the slide, and guardrails are installed on both sides of the construction walkway.

10. The sliding construction device for bridge main beams according to claim 1, characterized in that: A polytetrafluoroethylene (PTFE) sliding plate is also placed between the slide and the skate.

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