Sectional assembly method of a railway bridge light bridge deck crane

Abstract

The application discloses a segment assembling method of a portable bridge deck crane of a railway bridge, which comprises the following steps: installing and anchoring a 0# segment; installing a single bridge builder; transporting and assembling a 1# segment; installing another bridge builder and connecting the two bridge builders in a head-to-tail mode; transporting and lifting a 2# segment; assembling the 2# segment by using a cantilever assembling method; passing the bridge builder through a hole and installing a bridge deck beam transporting vehicle; lifting a 3# segment; assembling the 3# segment by using the cantilever assembling method; repeatedly assembling the remaining segments; installing a side span transition segment; erecting a segment beam of a T structure; removing the equipment and completing the construction of the whole bridge. The construction method solves the problem that the bridge deck crane cannot feed the beam from the tail of the bridge when lifting the beam. In the construction method, the segment does not need to be rotated by 90 DEG, so that a large bending moment is not generated on the bridge. The application solves the problem that the traditional bridge deck crane needs to extend the segment to a long distance for rotation, so that the pulling force of the anchor bolt of the crane is too large and the unbalanced bending moment on the pier top is too large.

Description

Technical Field

[0001] This invention belongs to the field of bridge structure construction, specifically relating to a segmental assembly method for a lightweight bridge deck crane for railway bridges. Background Technology

[0002] Railway bridges often bear large live loads, and the individual assembled segments of railway bridges are quite heavy.

[0003] Currently, when constructing segmental precast concrete bridges using the cantilever method, if the terrain beneath the bridge is high mountains, deep valleys, rapids, or shallows, or if traffic cannot be interrupted and it is impossible to feed and lift the beams from under the bridge, a bridge deck crane cannot be used. In such cases, a larger, full-span bridge erecting machine must be used, resulting in high construction costs.

[0004] To address the aforementioned issues, there is currently no segmental assembly method that can both reduce construction costs and utilize bridge cranes. Summary of the Invention

[0005] This invention is proposed to solve the problems existing in the prior art, and its purpose is to provide a segmental assembly method for a lightweight bridge deck crane for railway bridges.

[0006] The technical solution of this invention is: a method for assembling segments of a lightweight bridge deck crane for railway bridges, comprising the following steps: A. Install and anchor segment #0; B. Install a single bridge-building machine; C. Transport and assemble segment #1; D. Install another bridge-building machine and connect the two bridge-building machines end to end; E. Transport and lift section #2; F. Segment #2 is assembled using the suspension assembly method; G. The bridge-building machine passes through the span and the bridge deck transport vehicle is installed; H. Raise segment #3; I. The No. 3 segment was assembled using the suspension assembly method; J. Repeat the assembly of the remaining segments; K. Install the side-span transition section; L. Erecting the segmental beams of the T-structure; M. Dismantle the equipment and complete the construction of the entire bridge.

[0007] Furthermore, step A involves fine-tuning and anchoring segment #0, the specific process of which is as follows: First, select two central piers of the bridge and determine the two central piers as the initial installation positions; Then, a beam lifting machine was installed at each of the two central piers; Next, the 0# segment at the top of the pier was installed using the lifting machine installed at the middle pier. Next, fine-tune the installed segment #0; Finally, the finely adjusted segment #0 was anchored.

[0008] Furthermore, the beam lifting machine in step A is a PZQ200 beam lifting machine.

[0009] Furthermore, step B involves installing a single bridge-building machine, the specific process of which is as follows: First, the finely adjusted and anchored segment #0 is used as the installation foundation; Then, a single bridge-building machine was installed on segment #0.

[0010] Furthermore, step C involves transporting and assembling segment #1, the specific process of which is as follows: First, segment #1 was transported using a beam transport vehicle under the bridge; Then, the beam transport vehicle under the bridge feeds segment #1 to both sides of the central pier; Then, the bridge-building machine installed on segment 0 was used to pre-assemble segment 1; Finally, the #1 segment was suspended and assembled.

[0011] Furthermore, in step C, segment #1 undergoes cantilever assembly, which includes the following procedures: First, apply adhesive to segment #1 before assembly; Then, temporary tensioning is performed on segment #1; Next, permanent prestressing construction will be carried out; Finally, grouting and anchor sealing were carried out to complete the cantilever assembly of segment #1.

[0012] Furthermore, step D involves installing another bridge-building machine and connecting the two bridge-building machines end to end, as detailed below: First, move the installed bridge-building machine forward through the arch; Then, install another bridge-building machine; Finally, the bridge-building machine that has moved forward through the hole is connected end to end with the bridge-building machine installed above.

[0013] Furthermore, in step D, the two bridge-building machines are connected end to end, as detailed below: First, the tail end frame of the bridge-building machine that was moved forward through the span was dismantled; Then, the rear-installed bridge-building machine is connected to the tail of the main beam of the support frame of the bridge-building machine that has been moved forward through the span.

[0014] Furthermore, step E involves transporting and lifting segment #2, as detailed below: First, two No. 2 segments were transported using a beam transport vehicle under the bridge; Then, the two No. 2 segments were lifted separately using a beam lifting machine; Finally, the two No. 2 segments were placed at the tail of the bridge-building machine.

[0015] Furthermore, step F involves assembling segment #2 using a suspension assembly method, the specific process of which is as follows: First, using two bridge-building machines, the No. 2 segment, which was placed at the rear of the bridge-building machine, was removed from the beam. Then, the No. 2 segment was lifted to the front end using two bridge-building machines; Finally, the two No. 2 segments were assembled using the suspension assembly method.

[0016] The beneficial effects of this invention are as follows: The construction method of this invention solves the problem of feeding beams from the tail of the bridge when the bridge deck crane cannot feed beams from under the bridge.

[0017] In the construction method of this invention, the segments do not need to be rotated 90°, which will not generate a large bending moment on the bridge.

[0018] In the construction method of this invention, the main beam of the bridge deck crane adopts a modular rapid assembly structure with flexible and varied dimensions, which can adapt to different bridge spans and segment sizes.

[0019] This invention solves the problems of excessive pull-out force on the anchor bolts and excessive unbalanced bending moment on the pier top caused by the traditional bridge deck crane requiring the segment to extend a long distance for rotation. Attached Figure Description

[0020] Figure 1 This is a side view of the standard hoisting segment of the present invention; Figure 2 This is a side view of the hoisting of segment #2 of the present invention; Figure 3 This is a front view of the present invention; Figure 4 This is a construction drawing of step A of the present invention; Figure 5 This is a construction drawing for step B of the present invention; Figure 6 This is a construction drawing of step C of the present invention; Figure 7 This is a construction drawing of step D of the present invention; Figure 8 This is a construction drawing of step E of the present invention; Figure 9 This is the construction drawing before the suspension assembly of step F of the present invention; Figure 10 This is the construction drawing after the suspension assembly of step F of the present invention; Figure 11 This is a construction drawing of step G of the present invention; Figure 12 This is a construction drawing of step H of the present invention; Figure 13 This is a construction drawing of step I of the present invention; Figure 14 This is a construction drawing of step J of the present invention; Figure 15 This is a construction drawing of step K of the present invention; Figure 16 This is a construction drawing of step L of the present invention. Detailed Implementation

[0021] The present invention will now be described in detail with reference to the accompanying drawings and embodiments: like Figures 1 to 16 As shown, a method for assembling segments of a lightweight bridge deck crane for railway bridges includes the following steps: A. Install and anchor segment #0; B. Install a single bridge-building machine; C. Transport and assemble segment #1; D. Install another bridge-building machine and connect the two bridge-building machines end to end; E. Transport and lift section #2; F. Segment #2 is assembled using the suspension assembly method; G. The bridge-building machine passes through the span and the bridge deck transport vehicle is installed; H. Raise segment #3; I. The No. 3 segment was assembled using the suspension assembly method; J. Repeat the assembly of the remaining segments; K. Install the side-span transition section; L. Erecting the segmental beams of the T-structure; M. Dismantle the equipment and complete the construction of the entire bridge.

[0022] Step A involves fine-tuning and anchoring segment #0, and the specific process is as follows: First, select two central piers of the bridge and determine the two central piers as the initial installation positions; Then, a beam lifting machine was installed at each of the two central piers; Next, the 0# segment at the top of the pier was installed using the lifting machine installed at the middle pier. Next, fine-tune the installed segment #0; Finally, the finely adjusted segment #0 was anchored.

[0023] The lifting machine in step A is a PZQ200 lifting machine.

[0024] Step B involves installing a single bridge-building machine, and the specific process is as follows: First, the finely adjusted and anchored segment #0 is used as the installation foundation; Then, a single bridge-building machine was installed on segment #0.

[0025] Step C involves transporting and assembling segment #1. The specific process is as follows: First, segment #1 was transported using a beam transport vehicle under the bridge; Then, the beam transport vehicle under the bridge feeds segment #1 to both sides of the central pier; Then, the bridge-building machine installed on segment 0 was used to pre-assemble segment 1; Finally, the #1 segment was suspended and assembled.

[0026] Step C involves the cantilever assembly of segment #1, which includes the following procedures: First, apply adhesive to segment #1 before assembly; Then, temporary tensioning is performed on segment #1; Next, permanent prestressing construction will be carried out; Finally, grouting and anchor sealing were carried out to complete the cantilever assembly of segment #1.

[0027] Step D involves installing another bridge-building machine and connecting the two bridge-building machines end-to-end. The specific process is as follows: First, move the installed bridge-building machine forward through the arch; Then, install another bridge-building machine; Finally, the bridge-building machine that has moved forward through the hole is connected end to end with the bridge-building machine installed above.

[0028] In step D, the two bridge-building machines are connected end to end. The specific process is as follows: First, the tail end frame of the bridge-building machine that was moved forward through the span was dismantled; Then, the rear-installed bridge-building machine is connected to the tail of the main beam of the support frame of the bridge-building machine that has been moved forward through the span.

[0029] Step E involves transporting and lifting segment #2, and the specific process is as follows: First, two No. 2 segments were transported using a beam transport vehicle under the bridge; Then, the two No. 2 segments were lifted separately using a beam lifting machine; Finally, the two No. 2 segments were placed at the tail of the bridge-building machine.

[0030] Step F involves assembling segment #2 using the suspension assembly method. The specific process is as follows: First, using two bridge-building machines, the No. 2 segment, which was placed at the rear of the bridge-building machine, was removed from the beam. Then, the No. 2 segment was lifted to the front end using two bridge-building machines; Finally, the two No. 2 segments were assembled using the suspension assembly method.

[0031] Specifically, step G involves the bridge-building machine passing through the span and installing the bridge deck transport vehicle. The specific process is as follows: First, disconnect the tail connection of the support frame beams of the two bridge-building machines; Then, the two bridge-building machines were passed through the span; Next, install the tail end frame; Finally, the bridge deck girder transport vehicle was installed.

[0032] Specifically, step H involves lifting segment #3, and the specific process is as follows: First, the No. 3 segment was transported using a beam transport vehicle under the bridge; Then, the No. 3 segment on the beam transport vehicle under the bridge is lifted by the beam lifting machine; Finally, segment #3 was placed on the bridge deck transport vehicle.

[0033] Specifically, step I involves assembling segment #3 using the suspension assembly method. The specific process is as follows: First, two bridge-building machines were used to lift segment #3 from the bridge deck transport vehicle to the front end; Then, the two No. 3 segments were assembled using the suspension assembly method.

[0034] Specifically, step J involves repeating the assembly of the remaining segments, as follows: For the remaining segments, repeat steps H and I, using the suspension assembly method for each segment.

[0035] In this embodiment, the remaining segments are segment 4, segment 5, and segment 6.

[0036] Specifically, step K involves installing the side-span transition segment, and the specific process is as follows: First, install the side span support at the corresponding position of the side span; Then, the transition section of the side span is lifted onto the side span support using a crane; Finally, adjustments were made to the transition segments of the side spans.

[0037] Even better, the transition segment of the side span is adjusted, and the adjustment unit includes elevation and position.

[0038] A more efficient construction process for the side span transition segment is as follows: First, the transition segments of the side spans are pre-assembled; Then, apply adhesive to the transition segment of the side span; Next, temporary prestressing is applied to the transition segments of the side spans; Next, wet joints are poured for the transition segments of the side spans; Finally, the internal prestressed tendons were tensioned in the transition segment of the side span to complete the construction work.

[0039] Specifically, step L involves erecting the segmental beams of the T-structure, and the specific process is as follows: After the two bridge-building machines complete the erection of one T-structure, they move to the next T-structure and use the same method to complete the erection of the segmental beams of the next T-structure.

[0040] Specifically, the following process also includes the steps between step L and step M: The middle span was wet-jointed and closed; Specifically, step M involves dismantling the equipment to complete the entire bridge construction. The detailed process is as follows: First, dismantle the bridge-building machine and the beam-lifting machine; Then, the prestressed construction of the entire bridge was carried out; Finally, the temporary anchorage of the central pier was removed, and the system conversion was completed.

[0041] Specifically, in this invention, the segments are hoisted from beside the pier onto the bridge deck transport trolley. The transport trolley then moves to below the rear of the bridge deck crane, and the longitudinal transfer trolley moves to the rear to hoist the beam.

[0042] The longitudinal trolley lifts the beam forward via the outriggers of the bridge crane, and the overhead crane lowers the beam to assemble the segments.

[0043] Bridge-building machines can be used individually or in pairs connected together.

[0044] A single bridge-building machine can be used for symmetrical cantilever assembly of segment #1.

[0045] Two bridge-building machines can be connected and spliced ​​together for symmetrical cantilever splicing of segment #2.

[0046] This invention solves the problems of excessive pull-out force on the anchor bolts and excessive unbalanced bending moment on the pier top caused by the traditional bridge deck crane requiring the segment to extend a long distance for rotation.

[0047] The frame pier of this invention is the tallest in China's railways. The prestressed crossbeams installed on the lower railway level solve the problem of lateral stiffness of ultra-high frame piers, avoid lateral sloping of the pier body, reduce the land area occupied, and save engineering costs.

[0048] This invention solves the problem of feeding beams from the tail of the bridge when the bridge deck crane cannot feed them from below.

[0049] In this invention, the segments do not need to be rotated 90°, thus avoiding a large bending moment on the bridge.

[0050] In this invention, the main beam of the bridge deck crane adopts a modular rapid assembly structure with flexible and varied dimensions, which can adapt to different bridge spans and segment sizes.

Claims

1. A method for assembling segments of a lightweight bridge deck crane for railway bridges, characterized in that: Includes the following steps: A. Install and anchor segment #0, the specific process is as follows: First, select two central piers of the bridge and determine the two central piers as the initial installation positions; Then, a beam lifting machine was installed at each of the two central piers; Next, the 0# segment at the top of the pier was installed using the lifting machine installed at the middle pier. Next, fine-tune the installed segment #0; Finally, the finely adjusted segment #0 was anchored. B. Install a single bridge-building machine; C. Transport and assemble segment #1; D. Install another bridge-building machine and connect the two bridge-building machines end to end. The specific process is as follows: First, move the installed bridge-building machine forward through the arch; Then, install another bridge-building machine; Finally, the bridge-building machine that has moved forward through the hole is connected end to end with the bridge-building machine installed above. The specific process of connecting the beginning and end is as follows: First, the tail end frame of the bridge-building machine that was moved forward through the span was dismantled; Then, the rear-installed bridge-building machine is connected to the tail of the main beam of the support frame of the bridge-building machine that has moved forward through the span. E. Transport and lift section #2; F. Segment #2 is assembled using the suspension assembly method; G. The bridge-building machine passes through the span and the bridge deck transport vehicle is installed. The specific process is as follows: First, disconnect the tail connection of the support frame beams of the two bridge-building machines; Then, the two bridge-building machines were passed through the span; Next, install the tail end frame; Finally, install the bridge deck beam transport vehicle; H. Elevate segment #3, the specific process is as follows: First, the No. 3 segment was transported using a beam transport vehicle under the bridge; Then, the No. 3 segment on the beam transport vehicle under the bridge is lifted by the beam lifting machine; Finally, segment #3 was placed on the bridge deck transport vehicle; I. The suspension assembly method was used to assemble segment #3. The specific process is as follows: First, two bridge-building machines were used to lift segment #3 from the bridge deck transport vehicle to the front end; Then, the two No. 3 segments were assembled using the suspension assembly method; J. Repeat the assembly of the remaining segments, as follows: For the remaining segments, repeat steps H and I, using the suspension assembly method for each segment. K. Install the side span transition segment, the specific process is as follows: First, install the side span support at the corresponding position of the side span; Then, the transition section of the side span is lifted onto the side span support using a crane; Finally, adjustments were made to the side-span transition segment; This includes adjusting the transition segments of the side spans, including adjusting their elevation and position; The construction process of the transition segment of the side span is as follows: First, the transition segments of the side spans are pre-assembled; Then, apply adhesive to the transition segment of the side span; Next, temporary prestressing is applied to the transition segments of the side spans; Next, wet joints are poured for the transition segments of the side spans; Finally, the internal prestressed tendons were tensioned in the transition segment of the side span to complete the construction work; L. Erecting other T-shaped segmental beams, the specific process is as follows: After the two bridge-building machines completed the erection of one T-structure, they moved to the next T-structure and used the same method to complete the erection of the segmental beams of the next T-structure. M. Dismantle the equipment and complete the entire bridge construction; The following process also exists between step L and step M: The middle span is wet-jointed and closed.

2. The segmental assembly method for a lightweight bridge deck crane for railway bridges according to claim 1, characterized in that: The lifting machine in step A is a PZQ200 lifting machine.

3. The segmental assembly method for a lightweight bridge deck crane for railway bridges according to claim 1, characterized in that: Step B involves installing a single bridge-building machine, and the specific process is as follows: First, the finely adjusted and anchored segment #0 is used as the installation foundation; Then, a single bridge-building machine was installed on segment #0.

4. The segmental assembly method for a lightweight bridge deck crane for railway bridges according to claim 1, characterized in that: Step C involves transporting and assembling segment #1. The specific process is as follows: First, segment #1 was transported using a beam transport vehicle under the bridge; Then, the beam transport vehicle under the bridge feeds segment #1 to both sides of the central pier; Then, the bridge-building machine installed on segment 0 was used to pre-assemble segment 1; Finally, the #1 segment was suspended and assembled.

5. The segmental assembly method for a lightweight bridge deck crane for railway bridges according to claim 4, characterized in that: Step C involves the cantilever assembly of segment #1, which includes the following procedures: First, apply adhesive to segment #1 before assembly; Then, temporary tensioning was performed on segment #1; Next, permanent prestressing construction will be carried out; Finally, grouting and anchor sealing were carried out to complete the cantilever assembly of segment #1.

6. The segmental assembly method for a lightweight bridge deck crane for railway bridges according to claim 1, characterized in that: Step E involves transporting and lifting segment #2, and the specific process is as follows: First, two No. 2 segments were transported using a beam transport vehicle under the bridge; Then, the two No. 2 segments were lifted separately using a beam lifting machine; Finally, the two No. 2 segments were placed at the tail of the bridge-building machine.

7. The segmental assembly method for a lightweight bridge deck crane for railway bridges according to claim 6, characterized in that: Step F involves assembling segment #2 using the suspension assembly method. The specific process is as follows: First, the No. 2 segment, which was placed at the tail of the bridge-building machine, was removed using two bridge-building machines; Then, the No. 2 segment was lifted to the front end using two bridge-building machines; Finally, the two No. 2 segments were assembled using the suspension assembly method.

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