Bridge construction cast-in-place support dismantling device and implementation method

Abstract

The invention discloses a bridge construction cast-in-place support dismantling device and an implementation method. Comprising a multi-point limiting longitudinal moving trolley and moving equipment used for dismantling a cast-in-place support in bridge construction. I-shaped steel beams are used as rails and are supported by steel pipe stand columns; the trolley is driven by a traction winch to transport the bailey truss to a position to be hoisted and dismantled. The invention aims to solve the problems that in the process of dismantling the bailey beam bracket, as the beam bottom space at the top surface of the bailey beam bracket is narrow, the bailey beam bracket cannot be directly hoisted and dismantled under a beam, if the bailey frame is directly dragged by adopting equipment such as a winch, the bailey frame is easy to roll over, and if a distribution beam at the bottom of the bailey frame is not flat, the construction cost is low. The sudden increase of resistance can cause the breakage of a steel rope of the winch to cause safety accidents; therefore, the safety risk in the Bailey beam dismantling process can be reduced, and the construction efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the field of bridge construction, and in particular to a mobile device and an implementation method for dismantling a cast-in-place support (Bailey beam) in bridge construction, which can be specifically used in construction such as dismantling Bailey beams in narrow space areas. Background Art

[0002] In the field of bridge construction, the removal of cast-in-place supports (such as Bailey beams) is a critical and challenging task. Taking the Tuojiang Fourth Bridge in Luzhou City as an example, the bottom of the concrete cast-in-place box beam is as high as 40m from the ground, and a steel pipe Bailey frame support is used for casting. In this case, the Bailey frame cannot be directly removed by a large crane. In the conventional removal of Bailey beam supports in the narrow space at the bottom of the bridge, it is difficult to directly lift and remove the beam under the beam due to the narrow space at the bottom of the beam above the top surface of the Bailey support. It is usually necessary to move the Bailey frame group at the bottom of the beam to the edge of the flange cantilever section, and then lift and remove it. However, if the Bailey frame group is directly dragged by the traditional dragging process, the Bailey beam is very likely to tip over, which undoubtedly brings great safety hazards to the construction. In addition, in the longitudinal movement operation of the Bailey frame group when removing the Bailey beam support, the ordinary movement method is difficult to ensure the integrity of the Bailey frame, and there is a high safety risk, and the construction efficiency is also low. At the same time, the existing technology cannot effectively prevent the mobile equipment from derailing when dealing with problems such as uneven gravity distribution and eccentric traction, which leads to obstruction of the demolition work and even safety accidents. Therefore, there is an urgent need to develop a safe and efficient bridge construction cast-in-place bracket removal device that can ensure the integrity of the Bailey frame. Summary of the invention

[0004] Therefore, in order to solve the above-mentioned deficiencies, the present invention provides a device and implementation method for removing cast-in-place brackets for bridge construction; the invention of this device eliminates the safety risk of rollover during the longitudinal movement of the Bailey beam, ensures the safety of Bailey frame removal construction in narrow space areas during bridge construction, and greatly improves construction efficiency. The purpose of the present invention is to solve the problem that during the removal of the Bailey beam bracket, due to the narrow space at the bottom of the beam at the top surface of the Bailey beam bracket, it is impossible to directly hoist and remove it under the beam. If the Bailey frame is directly dragged by a winch or other equipment, it will easily roll over. If the distribution beam at the bottom of the Bailey frame is uneven, the sudden increase in resistance may cause the winch steel rope to break and cause safety accidents. How to safely move the Bailey frame group at the bottom of the beam to the flange cantilever section for hoisting and removal and ensure the integrity of the Bailey frame, reduce the safety risk of the Bailey beam removal process, and improve construction efficiency.

[0005] The present invention is implemented by constructing a cast-in-place bracket removal device for bridge construction, which is characterized by: It includes a multi-point limited longitudinal movement trolley, which is a mobile device used for dismantling cast-in-place supports (Bailey beams) during bridge construction; It also includes utilizing I-beams as tracks, the I-beams being supported by steel tube columns; The mobile equipment used for dismantling cast-in-place brackets (Bailey beams) during bridge construction includes a side guide wheel assembly, a frame, an axle end baffle, bolts, spring washers, roller shafts, bushings, retaining rings, bearings, and rollers; the trolley is then driven by a traction winch to transport the Bailey frame to a location to be hoisted and dismantled.

[0006] According to the invention, a cast-in-place bracket removal device for bridge construction; the frame body is composed of two groups of channel steels and steel plates, each channel steel is used as one group, and the spacing between the two groups of channel steels is determined by the width of the I-beam rail flange. The frame directly bears the weight of the Bailey frame group, and is mainly used to bear the weight and transfer gravity to the bearings; There are 4 walking roller assemblies in total, which are arranged at the end of the frame, and are composed of the walking roller, roller shaft, bushing, bearing, bolt, and shaft end baffle. The walking roller is connected to the outer channel steel of the frame by the roller shaft and bearing, so that the walking roller can roll; it is mainly used for bearing weight and transferring gravity to the I-beam track; the guide wheels are arranged on the sides of the front and rear ends of the frame, a total of 4, and a rotating shaft is set in each guide wheel; the guide wheels are mainly used to limit the left and right positions of the longitudinal moving trolley when it is walking on the flange of the I-beam track, to ensure that the trolley will not leave the I-beam track due to problems such as uneven gravity distribution and eccentric traction during movement.

[0007] According to the present invention, a device for removing cast-in-place supports for bridge construction is provided; the device uses an I-beam as a track and cooperates with guide wheels to ensure that the trolley will not derail due to problems such as uneven gravity distribution and eccentric traction during the walking process; the device is used for removing cast-in-place supports (Bailey beams) during bridge construction.

[0008] According to the invention, a device for removing cast-in-place supports for bridge construction is described; during the longitudinal movement of the Bailey frame group, an I-beam is used as a longitudinal movement track, and a traction winch is installed on the bridge deck or under the beam to tow the longitudinal movement trolley. The trolley will be horizontally guided and limited by the guide wheels, and then the 4 sets of walking roller assemblies are coordinated with the rotating shaft to allow the walking rollers to roll. The transmission of the trolley load and the safe operation are ensured by the arrangement of the above-mentioned rotating shaft, bearings and walking rollers.

[0009] An implementation method according to the above-mentioned bridge construction cast-in-place bracket removal device; comprising the following implementation process; (1) Pre-construction preparation: Site survey and planning: Conduct a comprehensive survey of the bridge construction site to determine suitable locations for installing steel pipe columns and I-beam rails; Materials and equipment preparation: According to the design requirements, prepare sufficient steel pipe columns, I-beams, multi-point limit longitudinal movement trolleys and their components, such as side guide wheel assemblies, frames, shaft end baffles, bolts, spring washers, roller shafts, bushings, retaining rings, bearings, rollers, and traction winches; Equipment assembly: First assemble the frame body 2 at a suitable location on the construction site; the frame body is composed of 2 groups of channel steels and steel plates. According to the design spacing requirements, fix every 2 channel steels as a group to ensure that the frame can stably bear the weight of the Bailey frame group; then, install the travel roller assembly at the end of the frame. Each assembly includes a travel roller, roller shaft, bushing, bearing, bolt, and shaft end baffle. The travel roller is firmly connected to the channel steel on the outside of the frame through the roller shaft and bearing to ensure that the travel roller can roll flexibly. A total of 4 guide wheels are installed on the sides of the front and rear ends of the frame. A rotating shaft is set in each guide wheel to complete the assembly of the multi-point limited longitudinal movement trolley; Track construction: Use steel pipe columns to support I-beams and build longitudinal tracks; according to the bridge structure and the moving route of the Bailey frame group, accurately adjust the position and height of the I-beams to ensure the flatness and stability of the track so that the longitudinal trolley can run smoothly on the track; (2) Bailey frame removal implementation process: Connect the traction equipment: install the traction winch at a suitable position on the bridge deck or under the beam, and connect it to the multi-point limited longitudinal movement trolley to ensure that the traction rope is firm and the guidance is smooth; Place the Bailey frame on the trolley: Place the Bailey frame group to be removed stably on the frame of the multi-point limit longitudinal movement trolley, adjust the position of the Bailey frame so that its center of gravity coincides with the center of the frame as much as possible, ensure uniform distribution of gravity, and reduce safety hazards during subsequent movement; Start traction and limit guidance: Start the traction winch and start to slowly pull the longitudinal trolley; at this time, the guide wheels installed on the front and rear sides of the frame play a role, limiting and guiding the trolley to the left and right when it is moving on the flange of the I-beam track; due to the rotating shaft design of the guide wheel, it can flexibly adapt to the direction change of the trolley during movement, ensuring that the trolley will not leave the I-beam track due to problems such as uneven gravity distribution and eccentric traction; at the same time, the walking roller assembly cooperates with the rotating shaft to make the walking roller roll smoothly, stably transfer the trolley load to the I-beam track, and ensure the safe operation of the trolley; Transport to the cantilever section: Continue to pull the trolley to safely transport the Bailey frame assembly at the bottom of the beam to the edge of the flange cantilever section to be hoisted and removed; during the transportation process, closely observe the running status of the trolley, the fixing of the Bailey frame, and the stability of the track. If there is any abnormality, stop the machine and make adjustments in time; (3) Lifting and dismantling operations: Prepare lifting equipment: Arrange suitable lifting equipment, such as cranes, at the edge of the flange cantilever section in advance and check their performance and safety; Dismantling of Bailey frames: Use hoisting equipment to hoist the Bailey frames transported to the cantilever section one by one to the designated storage area; During the hoisting process, strictly follow the hoisting operation procedures to ensure that the Bailey frame dismantling process is safe and orderly; (4) Equipment dismantling and site cleaning: Dismantle the track and trolley: After the Bailey frame is dismantled, the traction winch 103, the multi-point limit longitudinal movement trolley, the I-beam track and the steel pipe column are dismantled in the reverse order of the erection; during the dismantling process, pay attention to protecting the equipment to avoid damage so as to facilitate subsequent reuse.

[0010] The present invention has the following advantages: (1) Preventing the risk of derailment: By setting up a side guide wheel assembly, a total of 4 guide wheels are installed on the sides of the front and rear ends of the frame, and a rotating shaft is set in each guide wheel, which effectively realizes the left and right limit of the longitudinal movement trolley when it travels on the flange of the I-beam track. This design can ensure that the trolley will not deviate from the I-beam track due to common problems such as uneven gravity distribution and eccentric traction during movement, fundamentally avoiding serious safety accidents caused by trolley derailment, and greatly ensuring the safety of construction workers and equipment on the construction site. (2) Preventing Bailey beams from tipping over: In order to solve the problem that the traditional dragging process can easily cause Bailey beams to tip over when removing Bailey beam brackets in the narrow space at the bottom of the bridge, this patented device uses a multi-point limited longitudinal movement trolley and an I-beam track to stably move the Bailey frame group at the bottom of the beam to the edge of the flange cantilever section. Compared with other dragging processes, this greatly reduces the risk of Bailey beams tipping over during movement, providing a reliable guarantee for construction safety. (3) Improve construction efficiency: The efficient transportation method uses a traction winch to drive a multi-point limited longitudinal shifting trolley to quickly transport the Bailey frame to the location to be hoisted and removed. For example, in the application and implementation of actual projects such as the Tuojiang Fourth Bridge in Luzhou City, the device successfully solved the problem that the Bailey frame could not be directly removed by a large crane. Through efficient longitudinal shifting operations, the construction time was reduced and the progress of the removal of the cast-in-place bracket of the entire bridge construction was accelerated. (4) Optimized structural design: The frame is composed of two sets of channel steel and steel plates. The spacing between the two sets of channel steel is determined according to the width of the I-beam rail flange. It can directly bear the weight of the Bailey frame and efficiently transfer gravity to the bearings. A total of four walking roller assemblies are set at the end of the frame. The walking rollers are connected to the outer channel steel of the frame using roller shafts and bearings, so that the walking rollers can roll smoothly, ensuring the smooth transmission of the trolley load and safe operation, and further improving the efficiency of the Bailey frame longitudinal movement operation. (5) Ensure the integrity of the Bailey frame: During the longitudinal movement of the Bailey frame group when removing the Bailey beam support, the longitudinal movement trolley can safely move the Bailey frame group at the bottom of the beam to the flange cantilever section for lifting and removal. The entire process effectively ensures the integrity of the Bailey frame. This not only reduces the cost of replacing equipment due to Bailey frame damage, but also avoids construction delays caused by equipment damage, which is of great significance for ensuring project quality and construction progress. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1-Figure 2 Overall structural diagram of Bailey frame longitudinal movement; Figure 3-Figure 6 It is a schematic diagram of the implementation of the longitudinal shift trolley of this application.

[0012] Among them: longitudinal movement trolley 100, I-beam rail 101, cast-in-place bracket (Bailey beam) 102, traction winch 103, steel pipe column 104, concrete box beam 105; side guide wheel assembly 1, frame 2, shaft end baffle 3, bolt 4, spring washer 5, roller shaft 6, bushing 7, retaining ring 8, bearing 9, roller 10. DETAILED DESCRIPTION

[0013] The following will be combined with the attached Figure 1-Figure 6 The present invention is described in detail, and the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0014] The present invention provides a device and method for removing cast-in-place supports for bridge construction; the following is a detailed description; in the removal of Bailey beam supports in the narrow space at the bottom of the bridge, due to the narrow space at the bottom of the beam above the top surface of the Bailey support, it is impossible to directly lift and remove it under the beam, and the Bailey frame group at the bottom of the beam needs to be moved to the edge of the flange cantilever section for lifting and removal. If other towing processes are used for direct dragging, the Bailey beam often overturns, posing a huge safety hazard. At the same time, combined with the bottom of the concrete cast-in-place box girder of the Tuojiang Fourth Bridge in Luzhou City, which is 40m from the ground, a steel pipe Bailey frame support is used for casting, and the Bailey frame cannot be directly removed by a large crane. Therefore, the multi-point limited longitudinal shift trolley in this article is developed for the longitudinal movement of the Bailey frame group when the cast-in-place box girder support is removed, eliminating safety hazards and improving construction efficiency.

[0015] The present application provides a device for removing cast-in-place supports for bridge construction; a mobile device for removing cast-in-place supports (Bailey beams) during bridge construction. When removing Bailey beam supports in the narrow space at the bottom of the bridge, the space at the bottom of the beam above the top surface of the Bailey support is narrow, so it is impossible to directly lift and remove the beam. The Bailey frame group at the bottom of the beam needs to be moved to the edge of the flange cantilever section before lifting and removing. If other towing processes are used to directly drag the beam, the Bailey beam often tips over, which poses a great safety hazard. Figure 1 As shown in the figure, this equipment uses "I-beam" as track, sets guide wheels in front and behind the trolley, and sets 4 walking rollers at the bottom to ensure the moving safety of the longitudinal moving trolley. The invention of this equipment eliminates the safety risk of Bailey beam rollover during longitudinal movement, ensures the safety of Bailey frame dismantling construction in narrow space areas during bridge construction, and greatly improves construction efficiency.

[0016] like Figure 3-Figure 6 As shown, the mobile equipment used for dismantling the cast-in-place support (Bailey beam) in bridge construction includes a side guide wheel assembly 1, a frame 2, an axle end baffle 3, a bolt 4, a spring washer 5, a roller shaft 6, a bushing 7, a retaining ring 8, a bearing 9, and a roller 10; the trolley 100 is then driven by a traction winch 103 to transport the Bailey frame 102 to the position to be hoisted and dismantled.

[0017] In specific implementation, the frame body 2 is composed of 2 groups of channel steels and steel plates, with 2 channel steels as 1 group. The spacing between the 2 groups of channel steels is determined by the width of the flange of the I-beam track. The frame directly bears the weight of the Bailey frame group, and is mainly used for bearing weight and transferring gravity to the bearing. There are 4 walking roller assemblies, which are arranged at the end of the frame, and are composed of the walking roller 10, the roller shaft 6, the bushing 7, the bearing 9, the bolt 4, and the shaft end baffle 3. The walking roller 10 is connected to the outer channel steel of the frame body by the roller shaft 6 and the bearing 9, so that the walking roller can roll; it is mainly used for bearing weight and transferring gravity to the I-beam track 101; the guide wheels 1 are arranged on the sides of the front and rear ends of the frame, a total of 4, and a rotating shaft is arranged in each guide wheel; the guide wheels are mainly used for left and right limit when the longitudinal moving trolley is walking on the flange of the I-beam track, to ensure that the trolley will not be separated from the I-beam track 101 due to problems such as uneven gravity distribution and eccentric traction during movement.

[0018] The purpose of the present invention is to solve the problem that during the dismantling of a Bailey beam support, the space at the bottom of the beam at the top surface of the Bailey beam support is narrow and it is impossible to directly lift and dismantle the beam. If a winch or other equipment is used to directly drag the Bailey frame, the Bailey frame will easily tip over. If the distribution beam at the bottom of the Bailey frame is uneven, a sudden increase in resistance may cause the winch rope to break, leading to a safety accident. The problem of how to safely move the Bailey frame group at the bottom of the beam to the flange cantilever section for lifting and dismantling while ensuring the integrity of the Bailey frame is solved, thereby reducing the safety risk in the Bailey beam dismantling process and improving construction efficiency.

[0019] The implementation method of the present invention is that the guide wheels are arranged at the front and rear ends of the moving wheel seat, and a rotating shaft is arranged in each guide wheel; the guide wheels are mainly used for left and right limit and guidance when the longitudinal moving trolley walks on the top surface of the I-beam flange, ensuring that the trolley will not derail due to problems such as uneven gravity distribution and eccentric traction force during the walking process. The trolley walking roller group is arranged at the end of the frame, and the walking roller is connected to the outer channel steel by a roller shaft and a bearing, so that the walking roller can roll, and the transmission of the trolley load and the safe operation are ensured by the arrangement of the above-mentioned rotating shaft, bearing and walking roller.

[0020] The beneficial effect of the present invention is that during the longitudinal movement of the Bailey frame group when the Bailey beam support is removed, the Bailey frame group at the bottom of the beam can be safely moved to the flange cantilever section by using the longitudinal movement trolley, and then hoisted and removed to ensure the integrity of the Bailey frame, thereby reducing the safety risk of the Bailey beam removal process and improving construction efficiency. During the longitudinal movement of the Bailey frame group, an I-beam is used as a longitudinal movement track, and a traction winch is installed on the bridge deck or under the beam to tow the longitudinal movement trolley. The trolley will be horizontally guided and limited by the guide wheel, and then the 4 sets of walking roller assemblies are matched with the rotating shaft to allow the walking roller to roll. The above-mentioned rotating shaft, bearing and walking roller are set to ensure the transmission of the trolley load and safe operation.

[0021] The implementation process of this application is described below; (1) Pre-construction preparation: Site survey and planning: Conduct a comprehensive survey of the bridge construction site to determine the location suitable for installing steel pipe columns and I-beam rails. For situations such as the Tuojiang Fourth Bridge in Luzhou City where the bottom of the beam is high above the ground, it is particularly important to evaluate the terrain stability and surrounding environment to create conditions for subsequent equipment installation. Material and equipment preparation: According to the design requirements, prepare sufficient steel pipe columns 104, I-beams 101, multi-point limited longitudinal shift trolleys 100 and their components, such as side guide wheel assembly 1, frame 2, shaft end baffle 3, bolt 4, spring washer 5, roller shaft 6, bushing 7, retaining ring 8, bearing 9, roller 10, etc., and prepare the traction winch 103. Equipment assembly: First assemble the frame body 2 at a suitable location on the construction site. The frame body is composed of 2 groups of channel steels and steel plates. According to the design spacing requirements, every 2 channel steels are fixed as a group to ensure that the frame can stably bear the weight of the Bailey frame group. Subsequently, the travel roller assembly is installed at the end of the frame. Each assembly includes a travel roller 10, a roller shaft 6, a bushing 7, a bearing 9, a bolt 4, and an axle end baffle 3. The travel roller 10 is firmly connected to the channel steel on the outside of the frame through the roller shaft 6 and the bearing 9 to ensure that the travel roller can roll flexibly. A total of 4 guide wheels 1 are installed on the sides of the front and rear ends of the frame. A rotating shaft is set in each guide wheel to complete the assembly of the multi-point limited longitudinal shift trolley 100. Track construction: Use steel pipe columns 104 to support I-beams 101 and build longitudinal tracks. According to the bridge structure and the moving route of the Bailey frame group, accurately adjust the position and height of the I-beams to ensure the flatness and stability of the track so that the longitudinal trolley can run smoothly on the track. (2) Bailey frame removal implementation process: Connect the traction equipment: install the traction winch 103 at a suitable position on the bridge deck or under the beam, and connect it to the multi-point limited longitudinal movement trolley 100 to ensure that the traction rope is firm and the guidance is smooth. Place the Bailey frame on the trolley: Place the Bailey frame assembly 102 to be removed stably on the frame of the multi-point limit longitudinal movement trolley 100, adjust the position of the Bailey frame so that its center of gravity coincides with the center of the frame as much as possible, ensure uniform gravity distribution, and reduce safety hazards during subsequent movement. Start traction and limit guidance: Start the traction winch 103, and start to slowly pull the longitudinal movement trolley. At this time, the guide wheels 1 installed on the front and rear sides of the frame come into play, limiting and guiding the trolley to the left and right when it is traveling on the flange of the I-beam track. Due to the rotating shaft design of the guide wheel, it can flexibly adapt to the direction change of the trolley during movement, ensuring that the trolley will not leave the I-beam track 101 due to problems such as uneven gravity distribution and eccentric traction. At the same time, the walking roller assembly cooperates with the rotating shaft to make the walking roller 10 roll smoothly, stably transfer the trolley load to the I-beam track 101, and ensure the safe operation of the trolley. Transport to the cantilever section: Continue to pull the trolley to safely transport the Bailey frame assembly at the bottom of the beam to the edge of the flange cantilever section to be hoisted and removed. During the transportation process, closely observe the running status of the trolley, the fixation of the Bailey frame, and the stability of the track. If there is any abnormality, stop the machine and make adjustments in time. (3) Lifting and dismantling operations: Prepare lifting equipment: Arrange suitable lifting equipment, such as cranes, at the edge of the flange cantilever section in advance and check its performance and safety. Dismantling of Bailey Frame: Use hoisting equipment to hoist the Bailey Frame groups transported to the cantilever section one by one to the designated storage area. During the hoisting process, strictly follow the hoisting operation procedures to ensure that the Bailey Frame dismantling process is safe and orderly. (4) Equipment dismantling and site cleaning: Dismantle the track and trolley: After the Bailey frame is dismantled, the traction winch 103, the multi-point limit longitudinal movement trolley 100, the I-beam track and the steel pipe column 104 are dismantled in the reverse order of the erection. During the dismantling process, pay attention to protecting the equipment to avoid damage so that it can be reused later. Site cleaning: Clean up the construction site, sort and sort the dismantled equipment and materials, and transport them away from the site. Properly dispose of the waste generated during the construction process to restore the cleanliness and safety of the construction site.

[0022] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A device for removing cast-in-place brackets for bridge construction, characterized in that ； It comprises a multi-point limited longitudinal movement trolley (100), which is a mobile device used for dismantling cast-in-place brackets (102) during bridge construction; It also includes using an I-beam as a track (101), wherein the I-beam (101) is supported by a steel pipe column (104); The mobile equipment for dismantling a cast-in-place support (102) during bridge construction comprises a side guide wheel assembly (1), a frame (2), an axle end baffle (3), bolts (4), a spring washer (5), a roller shaft (6), a bushing (7), a baffle (8), a bearing (9), and a roller (10); the trolley (100) is then driven by a traction winch (103) to transport the Bailey frame (102) to a position to be hoisted and dismantled.

2. According to claim 1, a cast-in-place bracket removal device for bridge construction, characterized in that: The frame body (2) is composed of two groups of channel steels and steel plates, with two channel steels forming one group. The spacing between the two groups of channel steels is determined by the width of the flange of the I-beam track. The frame directly bears the weight of the Bailey frame group and is mainly used to bear the weight and transfer gravity to the bearings. There are four walking roller assemblies arranged at the end of the frame, and they are composed of the walking roller (10), a roller shaft (6), a bushing (7), a bearing (9), a bolt (4), and an axle end baffle (3). The walking roller (10) is connected to the outer channel steel of the frame by the roller shaft (6) and the bearing (9), so that the walking roller can roll. It is mainly used for bearing weight and transmitting gravity to the I-beam track (101). The guide wheels (1) are arranged on the side of the front and rear ends of the frame, and there are four guide wheels in total. A rotating shaft is arranged in each guide wheel. The guide wheels are mainly used for left and right limit when the longitudinal moving trolley is walking on the flange of the I-beam track, so as to ensure that the trolley will not leave the I-beam track (101) due to problems such as uneven gravity distribution and eccentric traction during movement.

3. According to claim 1, a cast-in-place bracket removal device for bridge construction, characterized in that: The device uses an I-beam as a track and cooperates with a guide wheel (1) to ensure that the trolley (100) will not derail due to problems such as uneven gravity distribution and eccentric traction during the walking process; the device is used for dismantling cast-in-place brackets (102) during bridge construction.

4. According to claim 1, a cast-in-place bracket removal device for bridge construction, characterized in that: During the longitudinal movement of the cast-in-place support Bailey frame (102), an I-beam is used as a longitudinal movement track, and a traction winch is installed on the bridge deck or under the beam to pull the longitudinal movement trolley. The trolley is horizontally guided and limited by the guide wheel, and then the 4 sets of walking roller assemblies cooperate with the rotating shaft so that the walking roller can roll. The above-mentioned setting of the rotating shaft, bearing and walking roller ensures the transmission of the trolley load and the safe operation.

5. A method for implementing the cast-in-place bracket removal device for bridge construction according to claim 1, characterized in that; The implementation process includes the following: (1) Pre-construction preparation: Site survey and planning: Conduct a comprehensive survey of the bridge construction site to determine suitable locations for installing steel pipe columns and I-beam rails; Preparation of materials and equipment: According to the design requirements, prepare sufficient steel pipe columns (104), I-beams (101), multi-point limit longitudinal shifting trolleys (100) and their components, such as side guide wheel assemblies (1), frames (2), shaft end baffles (3), bolts (4), spring washers (5), roller shafts (6), bushings (7), retaining rings (8), bearings (9), rollers (10), and prepare traction winches (103); Equipment assembly: First, assemble the frame body 2 at a suitable location on the construction site; the frame body is composed of 2 groups of channel steels and steel plates. According to the design spacing requirements, each 2 channel steels are fixed as a group to ensure that the frame can stably bear the weight of the Bailey frame group; then, install the walking roller assembly at the end of the frame, each assembly includes a walking roller (10), a roller shaft (6), a bushing (7), a bearing (9), a bolt (4), and an axle end baffle (3). The walking roller (10) is firmly connected to the channel steel on the outer side of the frame through the roller shaft (6) and the bearing (9) to ensure that the walking roller can roll flexibly; a total of 4 guide wheels (1) are installed on the sides of the front and rear ends of the frame, and a rotating shaft is set in each guide wheel to complete the assembly of the multi-point limited longitudinal movement trolley (100); Track construction: Use steel pipe columns (104) to support the I-beam (101) to build the longitudinal track; According to the bridge structure and the moving route of the Bailey frame group, the position and height of the I-beam are accurately adjusted to ensure the flatness and stability of the track so that the longitudinal moving trolley can run smoothly on the track; (2) Bailey frame removal implementation process: Connecting the traction equipment: Install the traction winch (103) at a suitable position on the bridge deck or under the beam, and connect it to the multi-point limited longitudinal movement trolley (100) to ensure that the traction rope is firm and the guidance is smooth; Placing the Bailey frame on the trolley: stably placing the Bailey frame assembly (102) to be removed on the frame of the multi-point limit longitudinal movement trolley (100), adjusting the position of the Bailey frame so that its center of gravity coincides with the center of the frame as much as possible, ensuring uniform distribution of gravity and reducing safety hazards during subsequent movement; Start traction and limit guide: Start the traction winch (103) and start to slowly pull the longitudinal moving trolley; At this time, the guide wheels (1) installed on the front and rear sides of the frame play a role in limiting and guiding the trolley to the left and right when it travels on the flange of the I-beam rail. Due to the design of the rotating shaft of the guide wheel, it can flexibly adapt to the direction change of the trolley during the movement, ensuring that the trolley will not leave the I-beam rail (101) due to problems such as uneven gravity distribution and eccentric traction. At the same time, the walking roller assembly cooperates with the rotating shaft to make the walking roller (10) roll smoothly, stably transferring the trolley load to the I-beam rail (101), thereby ensuring the safe operation of the trolley. Transport to the cantilever section: Continue to pull the trolley to safely transport the Bailey frame assembly at the bottom of the beam to the position to be hoisted and removed at the edge of the flange cantilever section; (3) Lifting and dismantling operations: Arrange suitable lifting equipment in advance at the edge of the cantilever section of the flange; use the lifting equipment to lift the Bailey frame groups transported to the cantilever section one by one to the designated storage area; during the lifting process, strictly follow the lifting operation procedures to ensure that the Bailey frame removal process is safe and orderly; (4) Equipment dismantling and site cleaning: Dismantling the track and trolley: After the Bailey frame is dismantled, the traction winch (103), the multi-point limit longitudinal movement trolley (100), the I-beam track and the steel pipe column (104) are dismantled in the reverse order of the erection. During the dismantling process, pay attention to protecting the equipment to avoid damage so that it can be reused later.

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