Portal rope displacement construction method and displacement device suitable for space cable suspension bridge

Abstract

The present application belongs to the field of bridge construction technology, and discloses a portal rope displacement construction method and displacement device suitable for spatial cable suspension bridges, comprising the following steps. Step one, setting the portal rope displacement device and the portal rope; step two, setting the catwalk and the main cable; the main cable setting is completed by the portal rope pulling the main cable. Step three, tightening the main cable; the main cable spacing is expanded, the portal rope displacement device is adjusted, and the cable tightening machine is used for tightening the main cable. Step four, installing the cable clamp; the portal rope displacement device is adjusted according to the installation position of the cable clamp, and the cable clamp is installed with the help of the zenith car. Step five, winding the main cable; the winding machine is hoisted by the zenith car arranged on the portal rope, the winding machine moves along the main cable and performs the winding operation. The present application enables the portal rope and the zenith car to move transversely with the equipment on the main cable, and solves the problem of lifting and hoisting in the construction process of the superstructure of the spatial cable suspension bridge.

Description

Technical Field

[0001] This invention belongs to the field of bridge construction technology, and relates to a method and device for portal rope displacement construction applicable to spatial cable suspension bridges. Background Technology

[0002] In the construction of the superstructure of suspension bridges, the gantry crane plays a crucial role as a lifting device in the stages of catenary installation and dismantling, main cable erection, cable tightening, cable clamp installation, beam lifting, and wire winding. However, due to the large spatial angle of long-span, large-angle spatial cable suspension bridges, the spacing of the main cables varies at each of the above stages. Since the gantry crane relies on gantry ropes for movement, significant changes in the main cable spacing during the construction process, coupled with the immobility of the gantry ropes, render the gantry crane unusable. Therefore, existing technologies require the use of other equipment during construction, increasing the complexity and difficulty of the project. Summary of the Invention

[0003] The purpose of this invention is to provide a gantry rope displacement construction method suitable for space cable suspension bridges, in order to solve the technical problem in the prior art where the main cable spacing changes greatly during the construction process of large-span, large-angle space cable suspension bridges, making it impossible to use the gantry crane normally and causing construction difficulties.

[0004] The method for gantry rope displacement construction applicable to spatial cable suspension bridges includes the following steps.

[0005] Step 1: Install the gantry rope positioning device and the gantry rope; the gantry rope positioning device can move laterally on the gantry at the top of the tower, and the gantry rope is installed on the gantry rope positioning device and can move with the gantry rope positioning device.

[0006] Step 2: Install the catwalk and main cable; complete the main cable installation by pulling the main cable with gantry ropes.

[0007] Step 3: Tighten the main cable; the main cable spacing is increased, the gantry rope positioning device is adjusted according to the initial jacking of the main cable, and the cable tightening machine is hoisted by a trolley set on the gantry rope and used to tighten the main cable.

[0008] Step 4: Install the cable clamps; the gantry rope positioning device is adjusted according to the installation position of the cable clamps, and the cable clamp installation is assisted by the gantry crane.

[0009] Step 5: Perform main cable winding; the winding machine is hoisted by a trolley mounted on the gantry rope. The winding machine moves along the main cable and performs winding operations. The gantry rope positioning device moves laterally in accordance with the winding machine as it moves along the main cable to achieve adaptive positioning.

[0010] Preferably, in step one, the two ends of the gantry rope bracket extend symmetrically from the top of the tower top gantry to both sides, and a pair of gantry rope displacement devices are symmetrically arranged on the gantry rope bracket. After the winch pulls, the gantry rope is parallel to the main axis of the bridge.

[0011] Preferably, in step three, during the main cable tensioning stage, the catwalk gantry is first removed, and the main cable spacing is increased by a certain distance by pushing through the cross bracing device at the cable saddle exit. The main cable spacing is the distance between a pair of main cables at the mid-span position. The gantry rope displacement device moves laterally in accordance with the tensioning machine as it moves along the main cable.

[0012] Preferably, in step five, during the main cable winding stage, the gantry rope is moved by the gantry rope displacement device to the main cable position at the top of the tower, and the gantry trolley hoists the winding machine, which is then installed onto the main cable from the top of the tower.

[0013] Preferably, the gantry rope displacement device should be locked during cable tightening operations and during cable clamp installation operations.

[0014] The present invention also provides a gantry rope displacement device suitable for space cable suspension bridges, applied to a gantry rope displacement construction method for space cable suspension bridges as described above, comprising a walking displacement device and a winch, wherein the winch is used to pull the gantry rope, the walking displacement device is used to move along the gantry rope bracket in a walking manner, and the winch is fixedly installed on the base of the walking displacement device and moves with the walking displacement device.

[0015] Preferably, the walking-type positioning device includes a base, a limiting device, a reaction seat, and a telescopic power device. The top of the gantry rope bracket is evenly provided with multiple limiting holes along its own length direction. The base and the reaction seat are connected through the power device. The reaction seat is detachably fixed to the top of the gantry rope bracket. The limiting device is disposed on the base and can pass through the base and the limiting holes to limit the base.

[0016] Preferably, a method for gantry rope displacement construction suitable for space cable suspension bridges employs a gantry rope displacement device as described above. In step one, the specific method for setting up the gantry rope displacement device includes: fixing the reaction seat to the top of the tower top gantry; setting the base on the top of the tower top gantry, with a certain distance between the base and the reaction seat; connecting the base and the reaction seat via a power device; fixing the winch on the base; and pulling up the gantry rope using the winch.

[0017] Preferably, a method for gantry rope displacement construction suitable for space cable suspension bridges employs a gantry rope displacement device as described above. In steps three to five, the specific method of operating the gantry rope displacement device includes: the operator manipulating the power unit to extend or retract in the direction of movement, driving the base to move laterally. The movement stops when a set position or limit position is reached. If further movement is needed after reaching the limit position, the base is first locked by a limiting device. Then, the connection between the reaction seat and the top of the gantry rope bracket is released. The power unit is then operated to move the reaction seat in the direction of the set position. When the power unit reaches the limit position, the reaction seat is fixed again to the top of the tower gantry. The process of driving the base laterally is repeated until the base reaches the set position.

[0018] Preferably, the installation and removal of the limiting device and the reaction seat are completed by the workers on the gantry rope bracket. During the main cable tightening stage and the cable clamp installation stage, the power unit is operated by the workers on the gantry rope bracket to ensure that the limiting device can be connected to the limiting hole at the corresponding working position. During the main cable winding stage, the workers performing the winding operation operate the power unit. When the power unit moves to the limiting hole near the limit position, the workers on the gantry rope bracket lock the base, and then the reaction seat is disassembled, moved, and re-fixed. After that, the workers performing the winding operation operate the power unit again.

[0019] The present invention has the following advantages: 1. It provides a stable and reliable hoisting equipment and construction method in the construction process of the superstructure of a space cable suspension bridge, allowing the gantry rope and the trolley to move laterally along with the equipment on the main cable, thus solving the hoisting problem in the construction process of the superstructure of a space cable suspension bridge.

[0020] 2. During the cable tightening and wire winding stages, use gantry ropes and trolleys to assist in fixing the cable tightening machine and wire winding machine to prevent them from tipping over during construction and movement.

[0021] 3. By using a limit device to lock the gantry rope, the stability of the hoisting equipment during the cable tightening and clamp installation stages is ensured, providing a safe, reliable, and efficient method for gantry rope displacement construction. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of a portal rope displacement construction method applicable to a spatial cable suspension bridge according to the present invention.

[0023] Figure 2 This is a schematic diagram of the structure on the cable tower in this invention.

[0024] Figure 3 for Figure 2 The structural diagram of the gantry rope displacement device in the described structure.

[0025] Figure 4 This is a schematic diagram of the structure of the tower and the cable tensioning machine during step three of the present invention.

[0026] Figure 5 This is a schematic diagram of the structure of the cable tower and the winding machine during step five of the present invention, when the main cable is wound at the top of the cable tower.

[0027] Figure 6 This is a schematic diagram of the structure on the tower and the winding machine during step five of the present invention, when the main cable is wound across the span.

[0028] Figure 7 This is a schematic diagram of the catwalk structure provided in this invention.

[0029] The reference numerals in the attached drawings include: 1. Tower, 2. Saddle, 3. Tower top gantry, 4. Gantry rope support, 5. Gantry rope displacement device, 501. Winch, 502. Base, 503. Walking push cylinder, 504. Reaction seat, 505. Limiting device, 6. Top turret, 7. Cable tensioner, 8. Catwalk, 9. Winding machine, 10. Catwalk gantry. Detailed Implementation

[0030] The following detailed description of the embodiments, with reference to the accompanying drawings, will further illustrate the specific implementation of the present invention, in order to help those skilled in the art to have a more complete, accurate, and in-depth understanding of the inventive concept and technical solution of the present invention.

[0031] like Figures 1 to 7 As shown, the present invention provides a method for portal rope displacement construction applicable to spatial cable suspension bridges, comprising the following steps:

[0032] Step 1: Set up the gantry rope displacement device 5 and the gantry rope.

[0033] In this step, firstly, a transverse gantry rope bracket 4 is erected on the top gantry 3 of the tower 1. Both ends of the gantry rope bracket 4 extend symmetrically from the top of the top gantry 3 to both sides. Then, a pair of gantry rope displacement devices 5 are symmetrically installed on the gantry rope bracket 4, and these devices can move along the gantry rope bracket 4. Next, the gantry rope is installed, and both ends of the gantry rope are pulled by winches 501 on the corresponding gantry rope displacement devices 5. After pulling, the gantry rope is parallel to the main axis of the bridge.

[0034] Step 2: Install catwalk 8 and main cable.

[0035] During the main cable erection phase, the gantry rope is positioned at the main cable erection location, and a catwalk 8 is erected at the corresponding location. The gantry rope is pulled by the winch 501 in the gantry rope positioning device 5, and the main cable is then erected by pulling the gantry rope. When installing the main cable, a cable traction mechanism connected to the main cable is installed on the gantry rope. The winch 501 pulls the gantry rope to achieve traction of the main cable, and then the main cable is installed on the saddle 2 at the top of the tower 1.

[0036] Step 3: Tighten the main cable.

[0037] During the main cable tightening stage, the catwalk gantry 10 is first removed. The main cable spacing is then increased by a certain distance (in this embodiment, the main cable spacing needs to be pushed to 2m) by the lateral support device at the exit of the cable saddle 2. The main cable spacing is the distance between a pair of main cables at the mid-span position. The gantry rope positioning device 5 is adjusted according to the initial pushing of the main cable. Then, a gantry trolley 6 is installed on the gantry rope. The cable tightening machine 7 is hoisted by the gantry trolley 6. The cable tightening machine 7 tightens the main cable. The gantry rope positioning device 5 moves laterally in accordance with the movement of the cable tightening machine 7 along the main cable. The gantry rope positioning device 5 must be locked during the cable tightening operation.

[0038] Step 4: Install the cable clamps.

[0039] During the cable clamp installation phase, the gantry rope positioning device 5 is adaptively adjusted according to the installation position of the cable clamp on the main cable. The gantry rope positioning device 5 moves laterally to position the gantry trolley 6 in the cable clamp installation position. The gantry trolley 6 assists in the installation of the cable clamp. The gantry rope positioning device 5 must be locked during the cable clamp installation operation.

[0040] Step 5: Perform wire wrapping on the main cable.

[0041] During the main cable winding stage, the gantry rope is moved to the main cable position at the top of tower 1 by the gantry rope positioning device 5. The gantry trolley 6 hoists the winding machine 9, and the winding machine 9 is installed on the main cable from the top of tower 1. After that, the winding machine 9 moves along the main cable and performs winding operations. The gantry rope positioning device 5 is adjusted accordingly with the winding machine 9. The gantry rope positioning device 5 moves laterally accordingly as the winding machine 9 moves along the main cable.

[0042] To achieve the above construction method, the present invention also provides a gantry rope displacement device 5 suitable for spatial cable suspension bridges, including a walking displacement device and a winch 501. The winch 501 is used to pull the gantry rope, and the walking displacement device is used to move along the gantry rope bracket 4. The winch 501 is fixedly installed on the base 502 of the walking displacement device and moves with the walking displacement device.

[0043] Specifically, the walking-type positioning device includes a base 502, a limiting device 505, a reaction seat 504, and a telescopic power device. The top of the gantry rope bracket 4 has multiple limiting holes evenly distributed along its length (in this embodiment, the spacing between adjacent limiting holes is 50cm). The base 502 and the reaction seat 504 are connected via the power device, and the reaction seat 504 is detachably fixed to the top of the gantry rope bracket 4. The power device is a walking-type jacking cylinder 503, with both ends connected to the base 502 and the reaction seat 504, respectively. The limiting device 505 (e.g., a limiting pin) is disposed on the base 502, and the limiting device 505 can pass through the base 502 and the limiting holes to limit the position of the base 502.

[0044] In step one above, the method for setting the gantry rope displacement device 5 includes: fixing the reaction seat 504 to the top of the tower top gantry 3, setting the base 502 on the top of the tower top gantry 3 with a certain distance between the base 502 and the reaction seat 504, connecting the base 502 and the reaction seat 504 through a power device, and then fixing the winch 501 on the base 502 to pull up the gantry rope through the winch 501.

[0045] In steps three to five above, this method operates the gantry rope positioning device 5 to move in a step-like manner, moving the winch 501 mounted on the base 502 to the set position, thus completing the lateral adjustment of the gantry rope. Specifically, the operator manipulates the power unit to extend or retract in the direction of movement, driving the base 502 to move laterally. The movement stops when the set position or limit position is reached. If further movement is needed after reaching the limit position, the base 502 is first locked by the limiting device 505. Then, the connection between the reaction seat 504 and the top of the gantry rope bracket 4 is released. The power unit is then operated to move the reaction seat 504 towards the set position. When the power unit reaches the limit position, the reaction seat 504 is fixed back to the top of the gantry 3. The steps of driving the base 502 to move laterally are repeated, and this cycle continues until the base 502 reaches the set position.

[0046] In the above steps, the installation and removal of the limiting device 505 and the reaction seat 504 are completed by the workers on the gantry rope bracket 4. After the reaction seat 504 is fixedly installed, the operation of the power unit can be completed by the workers on the gantry rope bracket 4 or remotely operated by the workers performing specific operations along the main cable via a remote control device. The specific operations include cable tightening, cable clamp installation, and wire winding. Since the workers performing specific operations along the main cable can more intuitively judge the distance of the gantry rope 6 on the catwalk 8 relative to the working position, they can better determine whether the gantry rope has reached the set position.

[0047] During the main cable tightening and cable clamp installation stages, the gantry rope needs to withstand significant forces during these operations. Therefore, the base 502 must be locked before the operation begins. Consequently, the power unit is operated by personnel on the gantry rope bracket 4 to ensure that the limiting device 505 can connect with the limiting hole at the corresponding work position. However, during the wire winding operation, the gantry rope experiences less force, and the gantry trolley 6 moves slowly with a short lateral movement distance each time. Therefore, the personnel performing the wire winding operation on the catwalk 8 operate the power unit. Only when the power unit moves close to the limiting hole at the limit position is the personnel on the gantry rope bracket 4 locked to the base 502. Then, the reaction seat 504 is disassembled, moved, and re-fixed. After that, the personnel performing the wire winding operation operate the power unit again.

[0048] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution of the present invention to other occasions without modification, are all within the protection scope of the present invention.

Claims

1. A method for constructing a portal rope displacement system suitable for a spatial cable suspension bridge, characterized in that: Includes the following steps: Step 1: Install a horizontal gantry rope bracket (4) on the top gantry (3) of the tower (1), and install a gantry rope displacement device (5) and a gantry rope; the gantry rope displacement device (5) can move laterally on the top gantry (3) of the tower (1), and the gantry rope is set on the gantry rope displacement device (5) and can move with the gantry rope displacement device (5); Step 2: Install the catwalk (8) and main cable; complete the main cable installation by pulling the main cable with the gantry rope; Step 3: Tighten the main cable; the main cable spacing is increased, the gantry rope displacement device (5) is adjusted according to the initial jacking of the main cable, and the cable tightening machine (7) is hoisted by the gantry trolley (6) set on the gantry rope and used to tighten the main cable. Step 4: Install the cable clamps; the gantry rope positioning device (5) adjusts the position according to the installation location of the cable clamps, and the cable clamps are installed by the gantry trolley (6); Step 5: Perform main cable winding; the winding machine (9) is hoisted by the gantry trolley (6) set on the gantry rope. The winding machine (9) moves along the main cable and performs winding operation. The gantry rope displacement device (5) moves laterally in accordance with the winding machine (9) along the main cable to achieve adaptive positioning. The gantry rope displacement device (5) includes a walking displacement device and a winch (501). The winch (501) is used to pull the gantry rope. The walking displacement device is used to move along the gantry rope bracket (4). The winch (501) is fixedly installed on the base (502) of the walking displacement device and moves with the walking displacement device. The walking displacement device includes a base (502), a limiting device (505), a reaction seat (504), and a telescopic power device. The top of the gantry rope bracket (4) is evenly provided with multiple limiting holes along its own length direction. The base (502) and the reaction seat (504) are connected through the power device. The reaction seat (504) is detachably fixed to the top of the gantry rope bracket (4). The limiting device (505) is provided on the base (502). The limiting device (505) can pass through the base (502) and the limiting holes to limit the base (502).

2. The method for portal rope displacement construction applicable to spatial cable suspension bridges according to claim 1, characterized in that: In step one, the two ends of the gantry rope bracket (4) extend symmetrically from the top of the tower top gantry (3) to both sides, and a pair of gantry rope displacement devices (5) are symmetrically arranged on the gantry rope bracket (4). After the winch (501) pulls, the gantry rope is parallel to the main axis of the bridge.

3. The method for portal rope displacement construction applicable to spatial cable suspension bridges according to claim 1, characterized in that: In step three, during the main cable tensioning stage, the catwalk gantry (10) is first removed, and the main cable spacing is increased by a certain distance by the lateral support device at the exit of the cable saddle (2). The main cable spacing is the distance between a pair of main cables at the mid-span position. The gantry rope displacement device (5) moves laterally in accordance with the tensioning machine (7) along the main cable.

4. The method for portal rope displacement construction applicable to spatial cable suspension bridges according to claim 1, characterized in that: In step five, during the main cable winding stage, the gantry rope is moved by the gantry rope displacement device (5) to the main cable position at the top of the tower (1), and the gantry trolley (6) hoists the winding machine (9), which is then installed on the main cable from the top of the tower (1).

5. The method for portal rope displacement construction applicable to spatial cable suspension bridges according to claim 1, characterized in that: When performing cable tightening operations, the gantry rope displacement device (5) must be locked. When performing cable clamp installation operations, the gantry rope displacement device (5) must be locked.

6. The method for portal rope displacement construction applicable to spatial cable suspension bridges according to claim 5, characterized in that: In step one, the specific method for setting the gantry rope displacement device (5) includes: fixing the reaction seat (504) on the top of the gantry rope bracket (4), setting the base (502) on the top of the gantry rope bracket (4), leaving a certain distance between the base (502) and the reaction seat (504), connecting the base (502) and the reaction seat (504) through a power device, and then fixing the winch (501) on the base (502) to pull up the gantry rope through the winch (501).

7. The method for portal rope displacement construction applicable to spatial cable suspension bridges according to claim 5, characterized in that: In steps three to five, the specific method of operating the gantry rope displacement device (5) includes: the operator controls the power device to extend or retract in the direction to be moved, driving the base (502) to move laterally. When the set position or limit position is reached, the operation stops. If the base (502) still needs to be moved after the limit position is reached, the base (502) is first locked by the limit device (505), and then the connection between the reaction seat (504) and the top of the gantry rope bracket (4) is released. The power device is then operated to move the reaction seat (504) in the direction of the set position. When the power device reaches the limit position, the reaction seat (504) is fixed again on the top of the gantry rope bracket (4). The step of driving the base (502) to move laterally is repeated. This cycle continues until the base (502) reaches the set position.

8. The method for portal rope displacement construction applicable to spatial cable suspension bridges according to claim 7, characterized in that: The installation and removal of the limiting device (505) and the reaction seat (504) are completed by the workers on the gantry rope bracket (4). During the main cable tightening stage and the cable clamp installation stage, the power unit is operated by the workers on the gantry rope bracket (4) to ensure that the limiting device (505) can be connected to the limiting hole at the corresponding working position. During the main cable winding stage, the workers performing the winding operation operate the power unit. When the power unit moves to the limiting hole near the limit position, the workers on the gantry rope bracket (4) lock the base (502), and then disassemble, move and re-fix the reaction seat (504). After that, the workers performing the winding operation operate the power unit again.

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