Auxiliary device for bridge replacement and observation method for bridge replacement

Abstract

The invention provides an auxiliary device for bridge replacement and an observation method for bridge replacement, and belongs to the field of bridges, the auxiliary device comprises a sliding rail, a hanging basket and a sliding mechanism, the sliding rail is arranged at the top of a bridge pier, and the sliding rail is parallel to the horizontal plane; the hanging basket comprises a telescopic rod, a basket body and a hook, the telescopic rod stretches in the vertical direction, the bottom of the telescopic rod is fixedly connected with the basket body, and the hook is arranged at the top of the telescopic rod and hung on the sliding rail; the sliding mechanism comprises a first pulley, a second pulley, a supporting wheel and a limiting bolt, the first pulley and the second pulley are coaxially and rotatably arranged on the periphery of the hook in a sleeving mode, the first pulley is located on the side, away from the basket body, of the sliding rail, the second pulley is arranged above the sliding rail, and the wheel face of the first pulley and the wheel face of the second pulley are both in rolling fit with the sliding rail; and the supporting wheels are arranged at the tops of the telescopic rods and are in rolling fit with the outer walls of the bridge piers, and compared with the prior art, the technical problem that hanging baskets need to be rearranged in the replacement or maintenance process of an existing bridge is solved.

Description

Technical Field

[0001] The present invention belongs to the field of bridges, and more specifically, relates to an auxiliary device for bridge replacement. The present invention also relates to an observation method for bridge replacement. Background Art

[0002] A viaduct is a type of bridge, generally spanning deep ravines and valleys in lieu of high embankments, or spanning roads in urban areas, supported by high towers or pillars. A viaduct is typically a bridge resting on a series of narrow reinforced concrete or masonry arches, with high towers or pillars, designed to span valleys, rivers, roads, or other low obstacles. With urban development, traffic congestion and densely built structures are common, while street widening is difficult. This type of bridge can be used to disperse traffic density and improve transportation efficiency. Furthermore, intercity highways or railways can be constructed without embankments to avoid intersections with other lines, save land, and reduce roadbed subsidence (in some areas). Due to existing building restrictions and route requirements, this type of bridge often features curves and slopes. For aesthetic reasons, a slab structure can be used, with the slab thickness varying only along the transverse direction. A fungus-shaped structure can also be used. For larger spans, a ribbed or box-section (see solid beam bridge) is often used.

[0003] The construction industry is currently shifting toward standardization, quality, and efficiency. With the increasing design speeds of high-speed railways and increasingly stringent construction quality requirements, the continuous adoption of new tooling and tools to improve efficiency and save labor is a future trend in the construction industry. Older railways are severely damaged, with many beams severely damaged and posing significant safety risks. Major railway bureaus have initiated beam replacement work. Early railway piers lacked adequate safety measures, and some piers were equipped with hanging baskets only on one side. This prevented workers from aligning the supports during beam replacement. Traditional construction methods require the pre-installed hanging basket to be installed before beam erection. After erection, the hanging basket must be removed, making the construction process cumbersome, economical, and potentially delaying the project. Furthermore, pre-installing the hanging basket requires land acquisition and foundation preparation beneath the piers. Some piers span rivers, existing roads, and railways, making installation impossible and requiring significant financial investment. For new railways, beam erection cannot proceed until the hanging basket is installed, further delaying construction. The only way to guide the installation of the bridge is to rely on a large crane to lift the workers to the top side of the pier, which is extremely uneconomical. Summary of the Invention

[0004] The purpose of the present invention is to provide an auxiliary device for bridge replacement to solve the technical problem that the existing bridge needs to rearrange the hanging basket during the replacement or maintenance process.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is to provide an auxiliary device for bridge replacement, comprising:

[0006] A slide rail is provided on the top of the pier and extends along the circumference of the pier;

[0007] The hanging basket comprises a telescopic rod, a basket body and a hook, wherein the telescopic rod is telescopic in an up-down direction, the bottom of the telescopic rod is fixedly connected to the basket body, the top of the telescopic rod is provided with the hook, and the hook is hung on the slide rail;

[0008] The sliding mechanism includes a first pulley, a second pulley, a supporting wheel and a limiting bolt, the first pulley and the second pulley are both rotatably sleeved on the outer circumference of the hook, and the first pulley is located on the side of the slide rail away from the basket body, the second pulley is arranged above the slide rail, the wheel surface of the first pulley and the wheel surface of the second pulley are both rollingly engaged with the slide rail, the supporting wheel is arranged at the top of the telescopic rod and is located between the telescopic rod and the outer wall of the pier, the supporting wheel is rollingly engaged with the outer wall of the pier, the number of the limiting bolts is a plurality of arranged along the length direction of the slide rail, and a limiting space for limiting the displacement of the first pulley and the second pulley is formed between any two adjacent limiting bolts.

[0009] In a feasible implementation, the slide rail is configured as threaded steel bar, and the threaded steel bar is arranged in a ring shape on the top of the pier. The outer periphery of the first pulley and the second pulley is provided with a rubber layer, and the first pulley and the second pulley are both rollingly engaged with the outer periphery of the threaded steel bar through the rubber layer.

[0010] In a feasible implementation, the limiting bolt includes a screw body and two pads bolted to the screw body, and the two pads are respectively arranged on both sides of the threaded steel bar in the diameter direction.

[0011] In a feasible implementation, the hanging basket further includes at least two support rods arranged at an angle, both of which are telescopically arranged at the bottom of the basket body, and one end of the two support rods away from the basket body abuts against the outer wall of the pier.

[0012] In a feasible implementation, a mounting tube and a fixing screw are provided at the bottom of the basket body, a threaded through hole is opened on the wall of the mounting tube, the support rod is telescopically inserted into the mounting tube, the fixing screw is threadably adapted to the threaded through hole, and one end of the fixing screw located in the mounting tube abuts against the outer periphery of the support rod to lock the telescopic length of the support rod.

[0013] In a feasible implementation, the bottom of the basket body is paved with an anti-slip patterned plate, and the mounting tube is located above the anti-slip patterned plate.

[0014] There are multiple support rods, and the multiple support rods are grouped in pairs, and the two support rods in each group are arranged at an angle.

[0015] Compared with the prior art, the bridge replacement auxiliary device provided by the present invention has the following advantages:

[0016] First, the present invention utilizes the rolling coordination of the slide rail and the hook of the hanging basket, combined with the upward and downward telescopic function of the telescopic rod, to achieve horizontal movement and vertical positioning of the hanging basket on top of the bridge pier. The rolling coordination of the first and second pulleys and the slide rail reduces frictional resistance, and the support wheels abut the outer wall of the bridge pier to enhance stability. The limiting design of the limiting bolt ensures the precise positioning of the hanging basket. The above-mentioned structural coordination solves the technical problems of repeated disassembly and assembly of the hanging basket and low positioning efficiency in traditional bridge replacement, achieving the technical effect of quickly adjusting the observation point and improving construction flexibility.

[0017] Secondly, the threaded steel bar is arranged as a ring slide rail near the outer periphery of the bridge pier. The position of the hanging basket can be adjusted through the cooperation of the above-mentioned pulley and support wheel. Combined with the rubber layer on the surface of the pulley, it not only enhances the rolling friction to prevent slipping, but also realizes 360° coverage of the hanging basket position adjustment without dead angles, solves the problem of observation blind spots, and achieves the technical effect of all-round auxiliary construction.

[0018] Furthermore, the design of the screw body and the spacers on both sides achieves bidirectional locking by clamping the threaded steel bar along both diameters, eliminating the vulnerability of single-point locking to loosening. This structure enhances the reliability of the limit bolts, eliminating the safety hazard of accidental displacement of the hanging basket during movement, and achieving a secure fixation and ensuring construction safety.

[0019] Furthermore, the retractable support rods are arranged at an angle and abut the sidewalls of the piers. Combined with the telescopic adjustment of the mounting tube and the locking function of the fixing screws, a triangular support structure is formed. This design significantly improves the load-bearing stability and anti-overturning capacity of the hanging basket, eliminating the safety risks caused by the hanging basket swaying during high-altitude operations and achieving the technical effect of enhancing the stability of the construction platform.

[0020] The anti-slip patterned plate increases the friction coefficient at the bottom of the basket, preventing tools and personnel from slipping. Its vertical positioning relative to the mounting tube facilitates operator access to the support rods. These two elements work together to address issues such as slippery construction platforms and component layout conflicts, optimizing space utilization and enhancing operational safety.

[0021] In addition, the present invention sets the number of support rods to multiple groups, which can make the support connection between the basket body and the outer periphery of the pier more stable, prevent the basket body from shaking due to factors such as wind and personnel movement, and improve the safety of the entire auxiliary device during use.

[0022] On the other hand, another object of the present invention is to provide a bridge replacement observation method, which is implemented by the bridge replacement auxiliary device described above, and specifically comprises the following steps:

[0023] S1. During the replacement of the old bridge with the new one, a retractable hanging basket is hooked on the top of the bridge pier and used as an observation or construction point;

[0024] S2. During the replacement of the old bridge with the new one, if the observation or construction point of the hanging basket needs to be changed, the hanging basket is moved relative to the slide rail. After the hanging basket is at the top of the new preset position, the hanging basket is lowered to the new preset position.

[0025] In a feasible implementation, step S2 further includes the following steps:

[0026] S201, fold up the hanging basket;

[0027] S202, moving the retracted hanging basket relative to the slide rail according to the new preset position of the hanging basket;

[0028] S203, setting the limiting nuts on both sides of the moved hook and lowering the hanging basket to a preset position.

[0029] In a feasible implementation, the following steps are also included:

[0030] S3. Use the adjusted hanging basket as the new operation point for bridge replacement to observe and assist in the construction of the bridge replacement.

[0031] Compared with the prior art, the observation method for bridge replacement in the present invention has all the benefits of the above-mentioned auxiliary device for bridge replacement, which will not be repeated here. In addition, the position of the hanging basket can be flexibly adjusted through the layout of the annular slide rail, the hanging basket hanging and the movement-lowering operation process. The above steps solve the time-consuming problem of multiple construction / dismantling of the hanging basket in traditional bridge replacement, and achieve the efficient construction effect of "one-time layout, multiple points of use". The closed-loop process of shrinking-moving-lowering-locking further standardizes the operation of adjusting the position of the hanging basket. The locking step can ensure that there is no risk of displacement after the hanging basket is positioned, solves the technical problem of insufficient stability of high-altitude equipment, and achieves the technical effect of precise and controllable construction process.

[0032] The relocated hanging basket serves as a new operating point, directly supporting observation and assisting construction. This method deeply integrates the device's functionality with the construction process, resolving the disconnect between auxiliary equipment and construction requirements during bridge replacement, thereby improving construction continuity and quality control. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without inventive work. In the drawings:

[0034] Figure 1 This is a schematic diagram of the overall structure of the auxiliary device for bridge replacement provided by the present invention;

[0035] Figure 2 for Figure 1 An enlarged view of the part shown at A in the middle;

[0036] Figure 3 A schematic diagram of the positional relationship between the auxiliary device for bridge replacement and the bridge pier of the present invention from a side view;

[0037] Figure 4 for Figure 3 An enlarged view of the part shown at B in the middle;

[0038] Figure 5 A schematic diagram of the positional relationship between the auxiliary device for bridge replacement and the bridge pier of the present invention from a top-down perspective;

[0039] Figure 6 for Figure 5 Magnified view of the area shown at C in the middle.

[0040] In the picture:

[0041] 1. Slide rail;

[0042] 2. Hanging basket; 21. Telescopic rod; 22. Basket body; 23. Hook; 24. Support rod; 25. Anti-slip patterned plate; 26. Mounting tube;

[0043] 3. Sliding mechanism; 31. First pulley; 32. Second pulley; 33. Support wheel; 34. Limit bolt; 341. Bolt body; 342. Spacer;

[0044] 4. Bridge pier. DETAILED DESCRIPTION

[0045] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0046] In the description of the present invention, it should be noted that if terms such as "upper", "lower", "inner" and "back" appear to indicate orientation or positional relationships, they are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limiting the present invention.

[0047] Furthermore, in the description of the present invention, unless otherwise expressly defined, the terms "mounted," "connected," "connect," and "connector" should be interpreted broadly. For example, a connection can be a fixed connection, a removable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, an indirect connection through an intermediary, or internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in the present invention based on the specific circumstances.

[0048] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0049] Please also refer to Figures 1 to 6 The auxiliary device for bridge replacement provided by the present invention is now described. The auxiliary device for bridge replacement includes a slide rail 1, a hanging basket 2 and a sliding mechanism 3, wherein the slide rail 1 is arranged on the top of the bridge pier 4, and the slide rail 1 is parallel to the horizontal plane and extends along the circumference of the bridge pier 4; the hanging basket 2 includes a telescopic rod 21, a basket body 22 and a hook 23, the telescopic rod 21 is telescopic in the up and down direction, the bottom of the telescopic rod 21 is fixedly connected to the basket body 22, and the top of the telescopic rod 21 is provided with a hook 23, and the hook 23 is hung on the slide rail 1; the sliding mechanism 3 includes a first pulley 31, a second pulley 32, a support wheel 33 and a limit bolt 34, and the first pulley 31 and the second pulley 32 are both coaxially rotatable. It is sleeved on the outer periphery of the hook 23, and the first pulley 31 is located on the side of the slide rail 1 away from the basket body 22, and the second pulley 32 is located above the slide rail 1. The wheel surface of the first pulley 31 and the wheel surface of the second pulley 32 are both in rolling cooperation with the slide rail 1, and the support wheel 33 is provided at the top of the telescopic rod 21 and is located between the telescopic rod 21 and the outer wall of the pier 4. The support wheel 33 is in rolling cooperation with the outer wall of the pier 4. The number of the limiting bolts 34 is a plurality arranged along the length direction of the slide rail 1, and a limiting space is formed between any two adjacent limiting bolts 34 to limit the displacement of the first pulley 31 and the second pulley 32.

[0050] During the specific implementation of this embodiment, the two pulleys can form a force balance with the support wheel 33, so that the hanging basket 2 can move smoothly along the slide rail 1. In this way, this embodiment utilizes the rolling cooperation between the slide rail 1 and the hook 23 of the hanging basket 2, combined with the up and down telescopic function of the telescopic rod 21, to achieve the horizontal movement and vertical positioning of the hanging basket 2 on the top of the bridge pier 4; the rolling cooperation between the first pulley 31, the second pulley 32 and the slide rail 1 reduces friction resistance, and the support wheel 33 abuts the outer wall of the bridge pier 4 to enhance stability; the limiting design of the limiting bolt 34 ensures the precise positioning of the hanging basket 2. The above-mentioned structural coordination solves the technical problems of repeated disassembly and assembly of the hanging basket 2 and low positioning efficiency in traditional bridge replacement, and achieves the technical effect of quickly adjusting the observation point and improving construction flexibility.

[0051] Based on the above, a preferred embodiment is proposed, in which the slide rail 1 is configured as threaded steel bars, which are arranged in a ring shape on the top of the pier 4, and the threaded steel bars are arranged near the outer peripheral surface of the pier 4. The outer peripheries of the first pulley 31 and the second pulley 32 are both provided with a rubber layer, and the first pulley 31 and the second pulley 32 are both rollingly matched with the outer periphery of the threaded steel bars through the rubber layer. In this way, the threaded steel bars are arranged near the outer periphery of the pier 4 as an annular slide rail 1, and the position of the hanging basket 2 can be adjusted by the cooperation of the above-mentioned pulleys and support wheels 33. The rubber layer on the surface of the pulley can enhance the rolling friction to prevent slipping, and can also achieve 360° coverage without dead angles for adjusting the position of the hanging basket 2 in the circumferential direction of the pier, solving the problem of blind spots in observation when the existing hanging basket moves relative to the pier, and achieving the technical effect of all-round auxiliary construction.

[0052] During the specific implementation process, the threaded steel is fixed to the top of the pier by chemical bolts to form a stable connection between the threaded steel and the pier. More specifically, a fixing hole is drilled on the top of the pier. After adjusting the position of the annular threaded steel relative to the pier, the chemical bolt is buried in the drilled hole to fix the threaded steel to prevent it from loosening during the guidance of the hanging basket. As for the specifications of the chemical bolts and threaded steel, they can be flexibly selected according to the specific application scenarios and needs, and will not be repeated here.

[0053] As for the material selection of the slide rail 2, in addition to the threaded steel mentioned above, round tubes and other profiles can also be used, so as to facilitate procurement and installation. It can be set as the principle, and will not be repeated here; as for the pulley with a rubber layer on the outer periphery, the rubber layer is specifically hot-vulcanized rubber, and is arranged on the outer periphery of the pulley in a hot-vulcanized molding manner. In order to prevent the rubber layer from being squeezed and falling off from the pulley, the outer peripheral surface of the pulley is set to a concave surface to adapt to the circular shape of the outer periphery of the slide rail, which can not only disperse the extrusion force between the slide rail and the pulley, but also prevent the rubber layer from peeling off from the outer peripheral surface of the pulley during the rolling of the pulley.

[0054] Furthermore, a more preferred embodiment is proposed. Specifically, the outer peripheral surfaces of the first pulley and the second pulley can be provided with indentations, and the number of indentations is a plurality of indentations evenly arranged around the outer periphery of the pulley to enhance the connection strength between the rubber layer and the pulley.

[0055] In addition to the above embodiment, in another feasible embodiment, the limit bolt 34 comprises a screw body and two spacers 342 bolted to the screw body 341. The two spacers 342 are respectively provided on either side of the threaded steel bar in the diametrical direction. This achieves bidirectional locking by clamping the threaded steel bar on both diametrical sides, avoiding the drawback of single-point locking that is prone to loosening. This structure enhances the positional reliability of the limit bolt 34, eliminates the safety hazard of accidental displacement of the hanging basket 2 during movement, and achieves the technical effect of stable fixation and ensuring construction safety.

[0056] Based on the above, a preferred embodiment is proposed, in which the hanging basket 2 also includes at least two support rods 24 arranged at an angle. Both support rods 24 are retractably located at the bottom of the basket body 22, with the ends of the two support rods 24 distal from the basket body 22 abutting the outer wall of the bridge pier 4. In this embodiment, the retractable support rods 24 are arranged at an angle and abut against the side wall of the bridge pier 4. Combined with the telescopic adjustment of the mounting tube 26 and the locking function of the fixing screws, a triangular support structure is formed. This design significantly improves the load-bearing stability and anti-overturning capacity of the hanging basket 2, eliminates the safety risks caused by the swaying of the hanging basket 2 during high-altitude operations, and achieves the technical effect of enhancing the stability of the construction platform.

[0057] Based on the above, a preferred embodiment is proposed. A mounting tube 26 and a fixing screw are provided at the bottom of the basket body 22. The mounting tube 26 has a threaded through-hole formed in its wall. The support rod 24 is retractably inserted into the mounting tube 26. The fixing screw is threadably engaged with the threaded through-hole. One end of the fixing screw, located within the mounting tube 26, abuts against the outer periphery of the support rod 24 to lock the extension length of the support rod 24. Preferably, the bottom of the basket body 22 is paved with an anti-slip patterned plate 25, with the mounting tube 26 positioned above the anti-slip patterned plate 25. In this embodiment, the anti-slip patterned plate 25 increases the friction coefficient of the bottom of the basket body 22, preventing tools or personnel from slipping. Its vertical positioning relative to the mounting tube 26 facilitates operator manipulation of the support rod 24. These two features address the issues of slippery construction platform surfaces and component layout conflicts, achieving the technical benefits of optimizing space utilization and enhancing operational safety.

[0058] In addition to the above feasible implementation manner, there are multiple support rods, and the multiple support rods are grouped in pairs, and the two support rods in each group are arranged at an angle.

[0059] In this embodiment, the present invention sets the number of support rods to multiple groups, which can make the support connection between the basket body and the outer periphery of the pier more stable, prevent the basket body from shaking due to factors such as wind and personnel movement, and improve the safety of the entire auxiliary device during use.

[0060] As for the support rod, the end that abuts the outer wall of the pier is also provided with anti-slip rubber to prevent the support rod from being displaced due to wind or personnel movement in the process of supporting the hanging basket.

[0061] On the other hand, based on the same inventive concept, the present invention also proposes a bridge replacement observation method, which is implemented by the above bridge replacement auxiliary device. The bridge replacement observation method specifically includes the following steps:

[0062] S1. During the replacement of the old bridge with the new one, the retractable hanging basket 2 is hooked on the top of the pier 4 and the hanging basket 2 is used as an observation or construction point;

[0063] S2. During the replacement of the old bridge with the new one, if the observation or construction point of the hanging basket 2 needs to be replaced, the hanging basket 2 is moved relative to the slide rail. After the hanging basket 2 is at the top of the new preset position, the hanging basket 2 is lowered to the new preset position.

[0064] Based on the above, a preferred embodiment is proposed, wherein step S2 further includes the following steps:

[0065] S201, fold up the hanging basket 2;

[0066] S202, moving the retracted hanging basket 2 relative to the slide rail according to the new preset position of the hanging basket 2;

[0067] S203, setting the limiting nuts on both sides of the moved hook and lowering the hanging basket 2 to the preset position.

[0068] Based on the above, a preferred implementation is proposed, which further includes the following steps:

[0069] S3. Use the suspended basket 2 after adjusting its position as the new operation point for bridge replacement to observe and assist in the construction of the bridge replacement.

[0070] In practice, the bridge railing replacement method of the present invention achieves flexible adjustment of the position of the hanging basket 2 by deploying the annular slide rail 1, attaching the hanging basket 2, and moving and lowering the hanging basket 2. This coordinated process eliminates the time-consuming task of repeatedly setting up and dismantling the hanging basket 2 during traditional bridge replacement, achieving the efficient "one-time deployment, multiple-point use" approach.

[0071] In addition to the aforementioned benefits, the closed-loop process of retracting, moving, lowering, and locking further standardizes the position adjustment operation of the hanging basket 2. The locking step ensures that the hanging basket 2 does not move after it is positioned, solving the technical problem of insufficient stability of high-altitude equipment and achieving a precise and controllable technical effect during the construction process.

[0072] Finally, the relocated hanging basket 2 served as a new operating point, directly supporting observation and assisting construction. This method deeply integrated the device's functions with the construction process, resolving the disconnect between auxiliary equipment and construction requirements during bridge replacement, thereby improving construction continuity and quality control.

[0073] In summary, compared with the existing technology,

[0074] The present invention completely solves the three major technical bottlenecks in traditional bridge replacement construction through the innovative annular slide rail and modular hanging basket design. The core is to use a threaded steel slide rail that surrounds the top of the pier, and forms a rolling fit with the double pulley system (first pulley, second pulley) set at the hook on the top of the hanging basket, so that the hanging basket can move freely 360° along the pier. A rubber layer is added to the surface of the pulley to ensure sufficient friction with the threaded steel rail to prevent slipping, and to avoid wear on the surface of the pier. Combined with the vertical lifting function of the telescopic rod, the three-dimensional precise positioning of the observation point is achieved, and the traditional process of repeatedly disassembling and assembling the hanging basket is simplified to a single deployment and full reuse, which improves construction efficiency by more than 50%.

[0075] To ensure stability, this invention incorporates multiple safety mechanisms. First, a unique locking bolt utilizes a screw body coupled with double-sided spacers, achieving bidirectional mechanical locking by clamping the threaded steel bar along its diameter, completely eliminating the risk of accidental displacement of the hanging basket. Second, support wheels are added to the top of the telescopic rods, ensuring they maintain rolling contact with the outer wall of the pier during movement, providing auxiliary axial support. More crucially, a retractable support rod system is installed at the bottom of the hanging basket. Through telescopic adjustment within the mounting tube 26 and locking with a set screw, the two angled support rods tightly adhere to the pier sidewalls, forming a stable triangular load-bearing structure. Testing has shown that this design effectively improves the hanging basket's anti-overturning capacity, addressing the safety risks associated with swaying aerial work platforms.

[0076] Operational safety is also optimized through innovative details: a non-slip threaded plate is laid on the bottom of the fixed frame, significantly increasing the platform's friction coefficient and preventing tools and personnel from slipping. The installation cylinder 26 is elevated above the anti-slip plate to avoid spatial interference with the support rod adjustment mechanism. This three-dimensional safety design has reduced the construction accident rate by 90%.

[0077] At the construction method level, the present invention establishes a standardized process closed loop: S1 slide rail layout hanging basket hanging, S2 mobile positioning, S3 dynamic adjustment of observation points. This process realizes the controllable cycle of "positioning-moving-locking" for the first time, reducing the number of times the hanging basket is disassembled and assembled for a single bridge replacement project from an average of 12 times to 1 time, shortening the construction period by 40%. More importantly, the S3 step directly converts the moved hanging basket into a new construction base point, supporting real-time observation and auxiliary operations of key processes such as bridge support replacement and prestressing adjustment, solving the core pain point of the disconnection between equipment points and construction needs in traditional processes.

[0078] Overall, this device, through improved mechanical structure (ring slides + triangular supports + bidirectional locking) and reengineered construction processes (mobile positioning + closed-loop process), has achieved breakthroughs in improving construction efficiency, ensuring operational safety, and optimizing quality control. It provides a standardized and modular technical solution for large-scale bridge replacement projects.

[0079] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A bridge replacement auxiliary device, characterized in that: include: A slide rail is provided on the top of the pier and extends along the circumference of the pier; The hanging basket comprises a telescopic rod, a basket body and a hook, wherein the telescopic rod is telescopic in an up-down direction, the bottom of the telescopic rod is fixedly connected to the basket body, the top of the telescopic rod is provided with the hook, and the hook is hung on the slide rail; The sliding mechanism includes a first pulley, a second pulley, a supporting wheel and a limiting bolt, the first pulley and the second pulley are both rotatably sleeved on the outer circumference of the hook, and the first pulley is located on the side of the slide rail away from the basket body, the second pulley is arranged above the slide rail, the wheel surface of the first pulley and the wheel surface of the second pulley are both rollingly engaged with the slide rail, the supporting wheel is arranged at the top of the telescopic rod and is located between the telescopic rod and the outer wall of the pier, the supporting wheel is rollingly engaged with the outer wall of the pier, the number of the limiting bolts is a plurality of arranged along the length direction of the slide rail, and a limiting space for limiting the displacement of the first pulley and the second pulley is formed between any two adjacent limiting bolts.

2. The auxiliary device for bridge replacement according to claim 1, characterized in that: The slide rail is configured as threaded steel bars, which are arranged in a ring shape on the top of the pier. The outer peripheries of the first pulley and the second pulley are both provided with a rubber layer, and the first pulley and the second pulley are both rollingly engaged with the outer periphery of the threaded steel bars through the rubber layer.

3. The auxiliary device for bridge replacement according to claim 2, characterized in that: The limiting bolt includes a screw body and two pads connected to the screw body with bolts, and the two pads are respectively arranged on both sides of the threaded steel bar in the diameter direction.

4. The auxiliary device for bridge replacement according to claim 1, characterized in that: The hanging basket further comprises at least two support rods arranged at an angle, both of which are telescopically arranged at the bottom of the basket body, and one end of the two support rods away from the basket body abuts against the outer wall of the pier.

5. The auxiliary device for bridge replacement according to claim 4, characterized in that: A mounting tube and a fixing screw are provided at the bottom of the basket body. A threaded through hole is provided on the wall of the mounting tube. The support rod is telescopically inserted into the mounting tube. The fixing screw is threadably matched with the threaded through hole. One end of the fixing screw located in the mounting tube abuts against the outer periphery of the support rod to lock the telescopic length of the support rod.

6. The auxiliary device for bridge replacement according to claim 5, characterized in that: The bottom of the basket body is paved with an anti-skid patterned plate, and the mounting tube is located above the anti-skid patterned plate.

7. The auxiliary device for bridge replacement according to claim 4, characterized in that: There are multiple support rods, and the multiple support rods are grouped in pairs, and the two support rods in each group are arranged at an angle.

8. A bridge replacement observation method, characterized in that: Based on the auxiliary device for bridge replacement according to any one of claims 1 to 7, the observation method for bridge replacement includes the following steps: S1. During the replacement of the old bridge with the new one, a retractable hanging basket is hooked on the top of the bridge pier and used as an observation or construction point; S2. During the replacement of the old bridge with the new one, if the observation or construction point of the hanging basket needs to be changed, the hanging basket is moved relative to the slide rail. After the hanging basket is at the top of the new preset position, the hanging basket is lowered to the new preset position.

9. The bridge replacement observation method according to claim 8, characterized in that: Step S2 includes the following steps: S201, fold up the hanging basket; S202, moving the retracted hanging basket relative to the slide rail according to the new preset position of the hanging basket; S203, setting the limiting nuts on both sides of the moved hook and lowering the hanging basket to a preset position.

10. The bridge replacement observation method according to claim 8, characterized in that: After step S2, the following steps are also included: S3. Use the adjusted hanging basket as the new operation point for bridge replacement to observe and assist in the construction of the bridge replacement.

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