Device and method for erecting prefabricated box girder side beams of small radius curved bridge

Abstract

The present invention provides a device and method for erecting side beams of prefabricated box beams for a small radius curve bridge, and relates to the field of bridge engineering technology. The device includes guide rails, auxiliary slide rails, a jacking unit, a force transmission unit, and a horizontal push cylinder, etc. The beam body is placed on the jacking cylinder, and the sliding box body and the beam body are pushed by the horizontal push cylinder to push the beam body to the installation position. The jacking cylinder and the beam body are pushed by the longitudinal push cylinder to adjust the position of the beam body to ensure the accuracy of the installation position of the beam body. After the position adjustment of the beam body is completed, the auxiliary slide rails and the force transmission unit are removed, and the rubber bearings are installed on the support pedestal stone, and then the jacking cylinder is controlled to return oil so that the beam body falls onto the rubber bearings. The present invention effectively solves the problem that the side beams of a small radius curve bridge cannot be put into place using a walking bridge erection machine, and the adjustment of the beam body position is more convenient and accurate, and the construction is simple, safe and reliable.

Description

Technical Field

[0001] The invention relates to the technical field of bridge engineering, and in particular to a device and method for erecting side beams of prefabricated box beams for a small-radius curved bridge. Background Art

[0002] Prefabricated beams are prefabricated in factories and then transported to the construction site for installation and fixation according to the design requirements. Prefabricated beams have been widely used in the current road and bridge construction in my country. For the erection of prefabricated beams, crawler bridge erection machines are currently used. Crawler bridge erection machines have the advantages of easy installation and disassembly and high reliability, and have become the main method for erecting prefabricated beam bridges.

[0003] However, for beam bridges with small curve radius and large superelevation slope, the use of walking bridge erection machines has many limitations and technical problems. Especially when erecting side beams, the beam is difficult to move into place due to the limited lateral position of the front and rear outrigger walking wheels. If the lateral position of the walking wheels is too close to the edge and the center of gravity of the beam is outward, the bridge erection machine is prone to instability. Summary of the invention

[0004] In view of this, the purpose of the present invention is to provide a device and method for erecting side beams of prefabricated box beams for small-radius curved bridges to solve the above-mentioned problems.

[0005] Based on the above purpose, the present invention provides a device for erecting side beams of prefabricated box beams for a small radius curve bridge, comprising: guide rails, auxiliary slide rails, a lifting unit, a force transmission unit and a horizontal thrust cylinder. The prefabricated box beam comprises a cap beam, and a support pad stone is arranged on the cap beam; the cap beams at both ends of the support pad stone are respectively connected with guide rails, and the support pad stone is connected with auxiliary slide rails, and the two ends of the auxiliary slide rails are respectively connected with the guide rails on both sides, and the auxiliary slide rails are located on the same axis as the guide rails and the upper surfaces are flush; a lifting unit is arranged on the guide rail, and the lifting unit comprises a sliding box body, a lifting cylinder, a longitudinal A push cylinder and a supporting subunit, a sliding box is slidably connected to the guide rail, the sliding box is a top-open structure, a lifting cylinder is arranged in the sliding box, a longitudinal push cylinder is connected to the side wall of the sliding box, and the output end of the longitudinal push cylinder is connected to the side wall of the lifting cylinder; a force transmission unit is arranged between the two sliding boxes, the two ends of the force transmission unit are respectively abutted against one end of the two sliding boxes, and the other end of the sliding box is connected to the supporting subunit; the horizontal push cylinder is installed on the guide rail on the side opposite to the jacking direction, and the output end of the horizontal push cylinder is connected to the adjacent sliding box.

[0006] Furthermore, the guide rail includes a track and a slide rail, the track is connected to the cap beam, the end of the track is close to the support pad stone, and the slide rail is connected to the track.

[0007] Furthermore, the force transmission unit includes a threaded rod, a sleeve and a force transmission plate. The two ends of the sleeve are respectively threadedly connected with the threaded rods, the threads of the two threaded rods are in opposite directions, and the ends of the threaded rods are connected with the force transmission plates. The coordinated use of the threaded rod and the sleeve facilitates tightening and disassembly, and the contact area between the threaded rod and the sliding box is increased through the force transmission plate.

[0008] Furthermore, the jacking unit also includes a temporary support, the sliding box is slidably connected to one side of the guide rail, and a slot is opened on the guide rail between the sliding box and the other side of the guide rail, and a temporary support is installed in the slot; it is used to temporarily support and protect the beam body when the jacking cylinder fails to prevent the beam body from tilting or overturning.

[0009] Furthermore, the supporting subunit includes a vertical screw, a ratchet wrench and a support plate. The vertical screw is vertically arranged, one end of the vertical screw is threadedly connected to the sliding box, and the other end of the vertical screw is connected to the support plate. The vertical screw is mounted with a ratchet wrench; the height of the support plate is adjusted by turning the ratchet wrench.

[0010] The erection method of prefabricated box girder side beams for small radius curved bridge is carried out according to the following steps:

[0011] S1. Guide rails are laid on the cap beams at both ends of the support pedestal stone, and auxiliary slide rails are installed on the support pedestal stone. Both ends of the auxiliary slide rails are connected to the guide rails at both ends respectively. The auxiliary slide rails and the guide rails are located on the same axis and the upper surfaces are flush.

[0012] S2. Install the lifting units on the two guide rails respectively, install the force transmission unit between the two lifting units, install the horizontal push cylinder on the guide rail located in the opposite direction of the horizontal push, and connect the output end of the horizontal push cylinder with the adjacent lifting unit.

[0013] S3. Raise the telescopic ends of the jacking cylinders in the two jacking units respectively, and keep the upper surfaces of the two jacking cylinders horizontal.

[0014] S4. Adjust the heights of the support plates in the two lifting units to be lower than the height of the upper surface of the lifting cylinder.

[0015] S5. Repeat S1 to S4 and install the erection device on the support pad stone on the other side.

[0016] S6. Lift the beam onto the lifting cylinder and adjust the height of the support plate so that the support plate is close to the bottom of the beam.

[0017] S7. Tighten the force transmission unit so that the force transmission plate in the force transmission unit is in close contact with the sliding box in the lifting unit.

[0018] S8. Start the push cylinder to push the beam to the horizontal design position.

[0019] S9. Check the longitudinal position of the beam. When there is a deviation between the beam position and the longitudinal design position, start the longitudinal push cylinder to push the beam to the longitudinal design position.

[0020] S10. Remove the force transmission unit from between the two sliding boxes and dismantle the auxiliary slide rail.

[0021] S11. Install the rubber bearing on the bearing pad stone and support the anti-tilt sleepers under the transverse partitions on both sides of the beam.

[0022] S12. Remove the temporary supports and supporting subunits in the jacking unit.

[0023] S13. Control the telescopic ends of the jacking cylinder to descend simultaneously, so that the beam falls onto the rubber support, supports the beam, and completes the erection of the beam.

[0024] Furthermore, the specific steps of S1 include: laying tracks on the cap beams at both ends of the support pedestal respectively, with the ends of the tracks close to the support pedestal, and the guide rails flush with the upper surface of the support pedestal; installing slide rails on the tracks, installing auxiliary slide rails on the support pedestal, and connecting the two ends of the auxiliary slide rails to the slide rails on both sides by bolts, and the auxiliary slide rails and the slide rails are located on the same axis and the upper surfaces are flush.

[0025] Compared with the prior art, the beneficial effects of the present invention are as follows: the beam body is placed on the lifting cylinder, and the sliding box body and the beam body are pushed by the horizontal push cylinder to push the beam body to the installation position. The lifting cylinder and the beam body are pushed by the longitudinal push cylinder to adjust the position of the beam body to ensure the accuracy of the installation position of the beam body. After the position adjustment of the beam body is completed, the auxiliary slide rail and the force transmission unit are removed, and the rubber bearing is installed on the support pad stone, and then the lifting cylinder is controlled to return oil so that the beam body falls onto the rubber bearing. The present invention effectively solves the problem that the side beam of a small radius curved bridge cannot be put into place using a walking bridge erection machine. The adjustment of the beam body position is more convenient and accurate, and the construction is simple, safe and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic diagram of a device for erecting prefabricated box girder side beams for a small radius curved bridge provided by an embodiment of the present invention;

[0027] Figure 2 A side view of a prefabricated box girder side girder erection device for a small radius curved bridge provided by an embodiment of the present invention;

[0028] Figure 3 A top view of a prefabricated box girder side beam erection device for a small radius curved bridge provided by an embodiment of the present invention;

[0029] Figure 4 A rear view of a prefabricated box girder side beam erection device for a small radius curved bridge provided by an embodiment of the present invention;

[0030] Figure 5 A schematic diagram of a jacking unit of a prefabricated box girder side beam erection device for a small radius curved bridge provided by an embodiment of the present invention;

[0031] Figure 6 A schematic diagram of an erection device for erecting side beams of a prefabricated box girder for a small-radius curved bridge provided in an embodiment of the present invention.

[0032] The markings in the figure are: 1. Track; 2. Slide rail; 3. Auxiliary slide rail; 4. Sliding box; 5. Lifting cylinder; 6. Longitudinal push cylinder; 7. Vertical screw; 8. Ratchet wrench; 9. Support plate; 10. Threaded rod; 11. Sleeve; 12. Force transfer plate; 13. Push cylinder; 14. Cap beam; 15. Support pad stone; 16. Cap beam stopper; 17. Temporary support; 18. Beam body; 19. Wedge block; 20. Partition plate; 21. Rubber bearing. DETAILED DESCRIPTION

[0033] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments.

[0034] like Figures 1 to 4 As shown, the present invention proposes a prefabricated box girder side beam erection device for a small radius curve bridge, which is composed of a guide rail, an auxiliary slide rail 3, a jacking unit, a force transmission unit and a horizontal thrust cylinder 13. The prefabricated box girder includes a cap beam 14, on which a support shim 15 is arranged, and a cap beam stopper 16 is arranged at the end of the cap beam 14. The cap beam 14 at both ends of the support shim 15 is respectively connected with a guide rail, and the guide rail is composed of a track 1 and a slide rail 2. The track 1 is connected to the cap beam 14, and the end of the track 1 is close to the support shim 15. The track 1 is located on the same axis with the support shim 15 and the upper surface is flush. The track 1 is connected with a slide rail 2, and the support shim 15 is connected with an auxiliary slide rail 3. The two ends of the auxiliary slide rail 3 are respectively connected with the slide rails 2 on both sides, and the auxiliary slide rail 3 is located on the same axis with the slide rail 2 and the upper surface is flush.

[0035] A lifting unit is provided on the slide rail 2, such as Figure 5As shown, the lifting unit is composed of a sliding box 4, a lifting cylinder 5, a longitudinal push cylinder 6, a supporting subunit and a temporary support 17. The sliding box 4 is slidably connected to one side of the guide rail, and a slot is provided on the guide rail between the sliding box 4 and the other side of the guide rail, and a temporary support 17 is installed in the slot. The sliding box 4 is a top-opening structure, and a lifting cylinder 5 is provided in the sliding box 4. The side wall of the sliding box 4 is connected to the longitudinal push cylinder 6, and the output end of the longitudinal push cylinder 6 is connected to the side wall of the lifting cylinder 5. A force transmission unit is provided between the two sliding boxes 4, and the force transmission unit is composed of a threaded rod 10, a sleeve 11 and a force transmission plate 12. The two ends of the sleeve 11 are respectively threadedly connected to the threaded rod 10, and the threads of the two threaded rods 10 are opposite. The end of the threaded rod 10 is fixedly connected to the force transmission plate 12, and the force transmission plate 12 is against one end of the sliding box 4. The other end of the sliding box 4 is connected to the supporting subunit, which is composed of a vertical screw rod 7, a ratchet wrench 8 and a support plate 9. The vertical screw rod 7 is vertically arranged, one end of the vertical screw rod 7 is threadedly connected to the sliding box 4, and the other end of the vertical screw rod 7 is connected to the support plate 9. The ratchet wrench 8 is mounted on the vertical screw rod 7. A support seat is connected to the guide rail located on the side opposite to the top push, and a horizontal push cylinder 13 is installed on the support seat. The output end of the horizontal push cylinder 13 is connected to the adjacent sliding box 4.

[0036] like Figure 6 As shown in the figure, the erection method of the prefabricated box girder side beam of the small radius curve bridge is carried out in the following steps:

[0037] S1. Tracks 1 are laid on the cap beams 14 at both ends of the support stone 15. The width of track 1 is approximately equal to the width of the support stone 15. The ends of track 1 are in close contact with the support stone 15. Track 1 and support stone 15 are located on the same axis. Sleepers and steel plates can be used to support track 1 so that the upper surface of track 1 and support stone 15 are flush.

[0038] Install the slide rail 2 on the track 1, install the removable auxiliary slide rail 3 on the support pad 15, and connect the two ends of the auxiliary slide rail 3 to the slide rails 2 on both sides by bolts. The auxiliary slide rail 3 and the slide rail 2 are located on the same axis and the upper surface is flush. During installation, ensure that the slide rail 2 and the auxiliary slide rail 3 are tightly connected to avoid any gap. The elevation of the top surface of the guide rail must meet the following conditions: guide rail thickness + height of the lifting cylinder 5 + maximum stroke of the lifting cylinder 5 > height of the rubber support 21 + exposed height of the wedge block 19 at the bottom of the box beam > guide rail thickness + height of the lifting cylinder 5.

[0039] S2. Install a support frame on the slide rail 2 located in the opposite direction of the horizontal push, and connect the horizontal push cylinder 13 to the support frame. The installation position of the horizontal push cylinder 13 should be selected to be a position that can push the beam body 18 into place at one time. Install the sliding box 4 on the two slide rails 2 respectively. The sliding box 4 is located on one side of the slide rail 2. The two sliding boxes 4 are located on the same axis, and the output end of the horizontal push cylinder 13 is connected to the sliding box 4 close to the horizontal push cylinder 13 through a pin shaft. And install a force transmission unit between the two sliding boxes 4. The position of the sliding box on the slide rail 2 must ensure that the bridge erection machine can place the beam body 18 on the lifting unit. The spacing between the two sliding boxes must ensure that the distance between the lifting cylinder 5 and the outer edge of the bottom of the beam is not less than 5cm, and must not conflict with the position of the wedge block 19. After the beam body 18 reaches the horizontal position, the sliding box can completely fall off the auxiliary slide rail 3, which is convenient for the subsequent removal of the auxiliary slide rail 3.

[0040] Temporary supports 17 are respectively installed on the slide rails 2 at the sides of the two sliding boxes 4 to provide temporary support and protection for the beam 18 when the lifting cylinder fails, preventing the beam 18 from tilting or tipping over. The temporary support 17 is a sand barrel, and the height of the sand barrel is controlled to be between the lifting cylinder 5 and the rubber support 21. A slot is provided on the slide rail 2, and the sand barrel base is clamped in the slot to prevent the sand barrel from shifting during operation. The slot is a three-sided slot, which is convenient for removing the temporary support 17 when the beam 18 is in place.

[0041] S3. Raise the two lifting cylinders 5 to a preset height. To ensure the safety of the beam 18 during the lowering process of the lifting cylinders 5, the distance between the wedge block 19 at the bottom of the beam and the rubber support 21 is controlled to be 10 mm after lifting. Use a level ruler to measure the two lifting cylinders 5 to keep the top surfaces of the two lifting cylinders 5 level. In this embodiment, the lifting cylinders 5 use a 100t short-stroke jack with a height of 120 mm, a stroke of 50 mm, and an outer diameter of 150 mm.

[0042] S4. Adjust the heights of the two supporting subunits so that the support plate 9 is slightly lower than the lifting cylinder 5.

[0043] S5, repeat S1 to S4, install the erection device on the other side support pad stone 15, the longitudinal push cylinders 6 of the erection device on the two support pad stones 15 are both located between the two support pad stones, or are both located outside the two support pad stones. In order to reserve enough operating space for pushing the side beams, the order of erecting the single-span beam plate is first the side beams and then the middle beams.

[0044] S6. Use a walking bridge erecting machine to hoist the beam 18 to the vicinity of the jacking cylinder 5, lay out and mark the jacking point at the bottom of the beam, and place the beam 18 on the jacking cylinder according to the jacking point. Adjust the height of the support plate 9 so that the support plate 9 is close to the bottom of the beam 18.

[0045] S7, rotating the sleeve 11 in the force transmission unit, and the two threaded rods 10 move in directions away from each other, so that the force transmission plates 12 at both ends respectively abut against the two sliding boxes 4.

[0046] S8. Perform a comprehensive inspection of the beam 18 and the entire device to ensure that there are no abnormalities. Simultaneously start the push cylinders 13 at both ends of the beam span until the beam 18 is pushed to the transverse design position. After stopping the transverse movement and checking that the beam 18 and the device are normal again, the surveyor measures the outer flange plate of the beam 18 and the center position of the support to ensure that the net width of the bridge deck and the deviation of the support center meet the design and specification requirements.

[0047] S9, the longitudinal position of the beam 18 is detected. If there is a deviation, the longitudinal push cylinder 6 on the side opposite to the longitudinal movement is started until the beam 18 is moved to the longitudinal design position. Since the stroke of the longitudinal push cylinder 6 is limited, when the beam 18 is placed on the jacking cylinder 5, the beam 18 should be adjusted to the longitudinal design position to avoid secondary deviation correction as much as possible, and the longitudinal deviation should be controlled within the stroke range of the longitudinal push cylinder 6.

[0048] S10, after the beam body 18 is in place, the sleeve 11 is rotated in the opposite direction to remove the force transmission unit from between the two sliding boxes 4. The auxiliary slide rail 3 is also removed.

[0049] S11, install the rubber bearing 21 on the bearing pad stone 15, so that the center line of the rubber bearing 21 coincides with the designed position on the bearing pad stone 15, and the rubber bearing 21 is accurately positioned. And support the anti-tilt sleepers under the diaphragms 20 on both sides of the beam body 18.

[0050] S12, dismantling the temporary support 17 and the supporting subunit in the jacking unit.

[0051] S13, control the telescopic ends of the jacking cylinder to descend simultaneously, so that the beam body 18 falls onto the rubber support 21, temporarily supports the beam body 18, dismantles the device, cleans the debris on the support pad stone 15, and completes the installation of the beam body 18.

[0052] The embodiments of the present invention are intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for erecting prefabricated box girder side beams for a small radius curved bridge, characterized in that: Follow these steps: S1. Guide rails are laid on the cap beams at both ends of the support pedestal stone, and auxiliary slide rails are installed on the support pedestal stone. The two ends of the auxiliary slide rails are connected to the guide rails at both ends respectively. The auxiliary slide rails and the guide rails are located on the same axis and the upper surfaces are flush; S2. Install the lifting units on the two guide rails respectively, install the force transmission unit between the two lifting units, install the horizontal push cylinder on the guide rail located in the opposite direction of the horizontal push, and connect the output end of the horizontal push cylinder to the adjacent lifting unit; S3, respectively raise the telescopic ends of the jacking cylinders in the two jacking units, and keep the upper surfaces of the two jacking cylinders horizontal; S4, adjusting the heights of the support plates in the two lifting units to be lower than the height of the upper surface of the lifting cylinder; S5, repeat S1 to S4, and install the erection device on the support pad stone on the other side; S6. Lift the beam onto the lifting cylinder and adjust the height of the support plate so that the support plate is close to the bottom of the beam; S7, tighten the force transmission unit so that the force transmission plate in the force transmission unit is close to the sliding box in the jacking unit; S8. Start the horizontal push cylinder to push the beam to the horizontal design position; S9, detecting the longitudinal position of the beam body, and when there is a deviation between the position of the beam body and the longitudinal design position, starting the longitudinal push cylinder to push the beam body to the longitudinal design position; S10, remove the force transmission unit from between the two sliding boxes, and remove the auxiliary slide rail; S11. Install the rubber bearing on the bearing pad stone, and support the anti-tilt sleepers under the diaphragms on both sides of the beam; S12, dismantling the temporary support and supporting subunit in the jacking unit; S13, controlling the telescopic ends of the jacking oil cylinder to descend simultaneously, so that the beam falls onto the rubber support, supports the beam, and completes the erection of the beam; The prefabricated box girder side beam erection device for a small radius curve bridge comprises: a guide rail, an auxiliary slide rail, a lifting unit, a force transmission unit and a horizontal push cylinder. The prefabricated box girder comprises a cap beam, and a support pad stone is arranged on the cap beam; the cap beams at both ends of the support pad stone are respectively connected to the guide rails, and the support pad stone is connected to the auxiliary slide rails, and the two ends of the auxiliary slide rails are respectively connected to the guide rails on both sides, and the auxiliary slide rails and the guide rails are located on the same axis and the upper surfaces are flush; the guide rails are provided with a lifting unit, and the lifting unit comprises a sliding box body, a lifting cylinder, a longitudinal push cylinder and a support Subunit, the sliding box is slidably connected to the guide rail, the sliding box is a top-opening structure, a lifting cylinder is arranged in the sliding box, a longitudinal push cylinder is connected to the side wall of the sliding box, and the output end of the longitudinal push cylinder is connected to the side wall of the lifting cylinder; a force transmission unit is arranged between the two sliding boxes, the two ends of the force transmission unit are respectively abutted against one end of the two sliding boxes, and the other end of the sliding box is connected to the supporting subunit; the horizontal push cylinder is installed on the guide rail on the side opposite to the vertical push direction, and the output end of the horizontal push cylinder is connected to the adjacent sliding box.

2. The method for erecting prefabricated box girder side beams of a small radius curve bridge according to claim 1, characterized in that: The guide rail comprises a track and a slide rail. The track is connected to the cap beam, the end of the track is close to the support pad stone, and the slide rail is connected to the track.

3. The method for erecting prefabricated box girder side beams of a small radius curve bridge according to claim 1, characterized in that: The force transmission unit comprises a threaded rod, a sleeve and a force transmission plate. The two ends of the sleeve are respectively threadedly connected with the threaded rods, the threads of the two threaded rods are in opposite directions, and the ends of the threaded rods are connected with the force transmission plate.

4. The method for erecting prefabricated box girder side beams of a small radius curve bridge according to claim 1, characterized in that: The lifting unit also includes a temporary support. The sliding box is slidably connected to one side of the guide rail. A slot is provided on the guide rail between the sliding box and the other side of the guide rail, and the temporary support is installed in the slot.

5. The method for erecting prefabricated box girder side beams of a small radius curve bridge according to claim 1, characterized in that: The supporting subunit comprises a vertical screw rod, a ratchet wrench and a supporting plate. The vertical screw rod is vertically arranged, one end of the vertical screw rod is threadedly connected to the sliding box body, and the other end of the vertical screw rod is connected to the supporting plate. The ratchet wrench is sleeved on the vertical screw rod.

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