Quick replacement device for suspender of steel box arch bridge

Abstract

The utility model discloses a steel box arch bridge suspender quick replacement device, which belongs to the technical field of bridge engineering construction and comprises a steel box arch rib, a bridge deck arranged below the steel box arch rib and a suspender arranged between the steel box arch rib and the bridge deck. The arch rib moving mechanism is connected with a lifting operation platform; the arch rib moving mechanism comprises a walking assembly arranged above a steel box arch rib, a driving motor arranged on the walking assembly and a supporting operation platform arranged above the walking assembly. The lifting operation platform comprises a lifting block used for bearing the load transmitted by the bridge deck after the lifting rod is dismantled and the force supply block used for outputting resistance to counteract the load transmitted by the lifting block. The steel box arch bridge suspender rapid replacement device adopting the structure is stable in structure, high in practicability, convenient to operate and labor-saving, the device transfer time in the suspender replacement period can be saved, the suspender replacement efficiency is improved, and therefore rapid replacement is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge engineering construction, in particular to a device for quickly replacing the suspenders of a steel box arch bridge. Background Technique

[0002] The steel box arch bridge has a novel design shape, clear structural stress, and relatively less material consumption compared with other structural forms. However, the overall performance of this type of bridge structure is relatively poor, and the cost of maintenance and regular inspection during normal operation is relatively high. At present, due to the substantial increase in traffic flow, the suspenders are also in an overloaded state for a long time and have not reached their designed service life, so they have to be replaced.

[0003] The steel box arch bridge has a special structural form, and there are few reference cases for replacing the suspenders of this type of bridge. When replacing the suspenders, a temporary support structure needs to be set up to bear the tension transmitted from the bridge deck after the suspenders are removed until the suspenders are reinstalled and tensioned. At present, the methods for replacing the suspenders can be divided into the arch rib support method, the temporary sling method, the bracket method, etc. The temporary sling method has reasonable force and is relatively economical and practical, and is widely used in related projects for replacing the suspenders. However, in actual operation, first, a fixing frame needs to be installed at the arch rib where the suspender is to be replaced. Four steel cable ropes are arranged around the fixing frame and connected to the I-shaped steel load-bearing frame under the bridge deck. A jack lifting platform is set between the arch rib and the bridge deck. After replacing an old suspender, it will move to the next old suspender to reinstall. On the one hand, the entire lifting system is heavy and consumes a lot of labor, further reducing the efficiency of suspender replacement. Secondly, because the installation steps of the fixing frame are relatively cumbersome, it will also cause a certain degree of wear to the arch rib during the installation process. Considering that the arch rib in the form of a steel box adopts a variable cross-section structure in design, the fixing frame also has the problem of not being reusable. Content of the Utility Model

[0004] The purpose of the utility model is to provide a device for quickly replacing the suspenders of a steel box arch bridge to solve the problems in the above background technique, and has the advantages of reducing labor consumption and ensuring the safety and high efficiency of the suspender replacement work.

[0005] To achieve the above purpose, the utility model provides a device for quickly replacing the suspenders of a steel box arch bridge, including a steel box arch rib, a bridge deck arranged under the steel box arch rib, and a suspender arranged between the steel box arch rib and the bridge deck. An arch rib moving mechanism is arranged above the steel box arch rib, and the arch rib moving mechanism is connected with a lifting operation platform; the arch rib moving mechanism includes a walking component arranged above the steel box arch rib, a driving motor arranged on the walking component, and a support operation platform arranged above the walking component. The lifting operation platform includes a lifting block for bearing the load transmitted from the bridge deck after the removed suspender unloads the force and a force supply block for outputting a resistance force to offset the load transmitted from the lifting block.

[0006] Preferably, the traveling assembly includes traveling rollers which are arranged on both sides of the top of the steel box arch rib, and several traveling rollers are arranged on each side. A transmission rod shaft is arranged between two opposite traveling rollers on both sides of the steel box arch rib. The driving motor is arranged on the transmission rod shaft. Parking calipers are arranged on the sides of the traveling rollers on the same side of the steel box arch rib away from each other.

[0007] Preferably, the supporting operation platform includes a load-bearing platform and a bait block arranged at the bottom of the load-bearing platform. The traveling rollers are connected to the load-bearing platform through the bait block. A rotating anchor seat is arranged on the top of the load-bearing platform.

[0008] Preferably, the force supply block includes a lifting support and a hydraulic jack connected to the bottom of the lifting support. One end of the lifting support and the free end of the hydraulic jack are both connected to the top of the load-bearing platform through the rotating anchor seat. A fixed anchor seat is arranged at the bottom of the lifting support.

[0009] Preferably, the lifting block includes an I-shaped steel platform arranged below the bridge deck. A steel cable is connected to the I-shaped steel platform. The end of the steel cable away from the I-shaped steel platform is connected to the fixed anchor seat, and a round hole for the steel cable to pass through is arranged on the bridge deck.

[0010] Preferably, one end of the suspender is connected to the bottom of the steel box arch rib, and the other end is anchored to the bottom of the bridge deck.

[0011] Preferably, two traveling rollers are arranged on each side of the top of the steel box arch rib.

[0012] Preferably, the rotating anchor seat and the load-bearing platform, the bait block and the load-bearing platform, and the I-shaped steel platform and the steel cable are all connected by bolts.

[0013] Therefore, for the steel box arch bridge suspender rapid replacement device with the above structure of the present utility model, the force supply block is arranged above the steel box arch rib instead of between the steel box arch rib and the bridge deck, reducing the number of components such as jacks used, being economical and practical, and also avoiding its shaking to improve the overall stability; using the arch rib moving mechanism to replace the traditional fixed frame structure, on the one hand, the load of the whole system can be transmitted to the force supply part at the top of the steel box arch rib, avoiding the collision and wear of the steel box arch rib structure in the traditional structure, and also making the operation of the operators more convenient and saving manpower. On the other hand, the system transfer time during the suspender replacement can be saved, improving the suspender replacement efficiency and realizing rapid replacement.

[0014] The technical solution of the present utility model will be further described in detail below through the drawings and embodiments. Description of the Drawings

[0015] Figure 1 It is a side view in the longitudinal direction of the bridge of an embodiment of the steel box arch bridge suspender rapid replacement device of the present utility model;

[0016] Figure 2 This is a transverse elevation schematic diagram of an embodiment of a device for quickly replacing the suspender of a steel box arch bridge according to the present utility model;

[0017] Reference numerals

[0018] 1. Steel box arch rib; 2. Bridge deck; 3. Suspender; 4. Traveling roller; 5. Transmission rod shaft; 6. Parking caliper; 7. Driving motor; 8. Bait block; 9. Rotating anchor seat; 10. Load-bearing platform; 11. Lifting bracket; 12. Hydraulic jack; 13. I-shaped steel platform; 14. Steel cable; 15. Fixed anchor seat; 16. Bolt. Detailed implementation manners

[0019] The technical solutions of the present utility model will be further described below with reference to the drawings and embodiments.

[0020] Unless otherwise defined, the technical terms or scientific terms used in the present utility model shall have the ordinary meanings understood by those of ordinary skill in the field to which the present utility model belongs. The "first", "second" and similar terms used in the present utility model do not denote any order, quantity or importance, but are only used to distinguish different components. The terms such as "comprising" or "including" mean that the elements or objects appearing before the term cover the elements or objects listed after the term and their equivalents, without excluding other elements or objects. The terms such as "connected" or "coupled" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The terms such as "upper", "lower", "left" and "right" are only used to represent relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0021] Embodiment

[0022] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the drawings.

[0023] As Figure 1-2As shown in the figure, a device for quickly replacing the suspenders of a steel box arch bridge includes a steel box arch rib 1, a bridge deck 2 arranged below the steel box arch rib 1, and a suspender 3 arranged between the steel box arch rib 1 and the bridge deck 2. One end of the suspender 3 is connected to the bottom of the steel box arch rib 1, and the other end is anchored to the bottom of the bridge deck 2. The steel box arch rib 1 may adopt a variable cross-section structural form. An arch rib moving mechanism is arranged above the steel box arch rib 1, and the arch rib moving mechanism is connected with a lifting operation platform; the arch rib moving mechanism includes a walking assembly arranged above the steel box arch rib 1, a driving motor 7 arranged on the walking assembly, and a supporting operation platform arranged above the walking assembly. The lifting operation platform includes a lifting block for bearing the load transmitted from the bridge deck 2 after the suspender 3 is removed and a force supply block for outputting a resistance force to offset the load transmitted from the lifting block.

[0024] The walking assembly includes walking rollers 4. The walking rollers 4 are arranged on both sides of the top of the steel box arch rib 1, and two are arranged on each side. A stop caliper 6 is arranged on the side away from each other of the two walking rollers 4 on each side. The stop caliper 6 is a magnetically adsorbable device and has the ability to be firmly connected to the steel box arch rib 1. Its function is to keep the lifting operation platform stable during the replacement of the suspender 3. The walking rollers 4 are used to move the lifting operation platform. A transmission rod shaft 5 is arranged between the two walking rollers 4 on opposite sides of the steel box arch rib 1. The transmission rod shaft 5 is an adjustable and self-adaptive telescopic system, and the length of the transmission rod shaft 5 can be adjusted corresponding to the variable cross-section width of the steel box arch rib 1 to ensure that the walking rollers 4 always remain in the track on the steel box arch rib 1. The driving motor 7 is arranged on the transmission rod shaft 5, and the power of the driving motor 7 comes from an external alternating voltage.

[0025] The supporting operation platform includes a load-bearing platform 10 and a bait block 8 arranged at the bottom of the load-bearing platform 10. The walking rollers 4 are connected to the load-bearing platform 10 through the bait block 8, and a rotating anchor seat 9 is arranged on the top of the load-bearing platform 10.

[0026] The force supply block includes a lifting support 11 and a hydraulic jack 12 connected to the bottom of the lifting support 11. The hydraulic jack 12 is located in the middle of the load-bearing platform 10. One end of the lifting support 11 and the free end of the hydraulic jack 12 are both connected to the top of the load-bearing platform 10 through the rotating anchor seat 9. The rotating anchor seat 9 is firmly connected to the load-bearing platform 10 through bolts 16. A fixed anchor seat 15 is arranged at the bottom of the lifting support 11. The fixed anchor seat 15 can be connected to the lifting support 11 in a prefabricated or welded form. To ensure the balanced force and stability of the lifting support 11, a cross structure can be arranged at the fixed anchor seat 15 where the force is concentrated.

[0027] The lifting block includes an I-shaped steel platform 13 arranged below the bridge deck 2. A steel cable 14 is connected to the I-shaped steel platform 13 by bolts 16. The connection between the bolts 16 and the steel cable 14 should be firm to meet the load-bearing requirements of the bridge deck 2. One end of the steel cable 14 away from the I-shaped steel platform 13 is connected to the fixed anchor seat 15, and round holes for the steel cable 14 to pass through are provided on the bridge deck 2.

[0028] During specific use, the arch rib moving mechanism is rotated to a specified position on the steel box arch rib 1, and the adsorbable vehicle stop caliper 6 is used to fix the front and rear traveling rollers 4 to ensure the overall stability of the entire replacement device during operation. After precise measurement and positioning, round holes are drilled on the bridge deck 2. The size of the round holes can allow the steel cable 14 to pass through. The steel cable 14 is tightly connected to the I-shaped steel platform 13 by bolts 16, and the upper part of the steel cable 14 is connected to the fixed anchor seat 15. In the initial state, the lifting bracket 11, the hydraulic jack 12, and the load-bearing platform 10 are in a parallel mode. When the I-shaped steel platform 13 below is ready, the operation starts. The hydraulic jack 12 is filled with liquid and extends, rotates around the rotating anchor seat 9, and pushes the lifting bracket 11 to rotate around the rotating anchor seat 9 together. At the same time, the fixed anchor seat 15 drives the steel cable 14 to climb. When the hanger 3 is unloaded, the above operations stop, and at the same time, the hanger 3 is disassembled and replaced. After the hanger 3 is replaced, the hydraulic jack 12 is retracted, the steel cable 14 is unloaded, the vehicle stop caliper 6 is removed, and the driving motor 7 is used to move the device to the next specified position. By operating in this cycle, the replacement of the hanger 3 can be quickly realized.

[0029] Therefore, the steel box arch bridge hanger rapid replacement device adopting the above structure in the present utility model has a stable structure, strong practicability, effectively avoids the collision and wear of the steel box arch rib structure in the traditional structure, is convenient to operate, saves manpower, can also save the device transfer time during the hanger replacement, improves the hanger replacement efficiency, and thus realizes rapid replacement.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model and are not intended to limit them. Although the present utility model has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that they can still modify or equivalently replace the technical solutions of the present utility model, and these modifications or equivalent replacements cannot make the modified technical solutions deviate from the spirit and scope of the technical solutions of the present utility model.

Claims

1. A quick replacement device for a steel box arch bridge suspender, comprising a steel box arch rib, a bridge deck arranged below the steel box arch rib, and a suspender arranged between the steel box arch rib and the bridge deck, characterized in that: An arch rib moving mechanism is arranged above the steel box arch rib, and the arch rib moving mechanism is connected to a lifting operation platform; the arch rib moving mechanism includes a traveling assembly arranged above the steel box arch rib, a driving motor arranged on the traveling assembly and a supporting working platform arranged above the traveling assembly, and the lifting operation platform includes a lifting block for bearing the load transmitted from the bridge deck after the force is unloaded by the dismantling boom, and a force supply block for outputting resistance to offset the load transmitted from the lifting block.

2. The steel box arch bridge suspender rod quick replacement device according to claim 1 is characterized in that: The walking assembly includes walking rollers, which are arranged on both sides of the top of the steel box arch rib, and a plurality of walking rollers are arranged on each side. A transmission rod shaft is arranged between two opposite walking rollers on both sides of the steel box arch rib, and a driving motor is arranged on the transmission rod shaft. A stop caliper is arranged on the side away from the walking rollers on the same side of the steel box arch rib.

3. The quick replacement device for the hanger rod of a steel box arch bridge according to claim 2 is characterized in that: The supporting working platform comprises a load-bearing platform and a bait block arranged at the bottom of the load-bearing platform, the walking roller is connected with the load-bearing platform through the bait block, and a rotating anchor seat is arranged on the top of the load-bearing platform.

4. The quick replacement device for the hanger rod of a steel box arch bridge according to claim 3 is characterized in that: The force supply block includes a lifting bracket and a hydraulic jack connected to the bottom of the lifting bracket. One end of the lifting bracket and the free end of the hydraulic jack are connected to the top of the load-bearing platform through a rotating anchor seat, and a fixed anchor seat is provided at the bottom of the lifting bracket.

5. The quick replacement device for the hanger rod of a steel box arch bridge according to claim 4 is characterized in that: The lifting block includes an I-shaped steel platform arranged below the bridge deck, the I-shaped steel platform is connected to a steel cable, one end of the steel cable away from the I-shaped steel platform is connected to a fixed anchor seat, and a circular hole for the steel cable to pass through is arranged on the bridge deck.

6. The quick replacement device for steel box arch bridge suspenders according to claim 1 is characterized in that: One end of the hanger is connected to the bottom of the steel box arch rib, and the other end is anchored to the bottom of the bridge deck.

7. The steel box arch bridge suspender rod quick replacement device according to claim 2 is characterized in that: Two walking rollers are provided on each side of the top of the steel box arch rib.

8. The quick replacement device for steel box arch bridge suspenders according to claim 5 is characterized in that: The rotating anchor seat and the load-bearing platform, the bait block and the load-bearing platform, and the I-beam steel platform and the steel cable are all connected by bolts.

Images