CN111877155A

CN111877155A - Bridge engineering construction is with preventing equipment that falls

Info

Publication number: CN111877155A
Application number: CN202010756842.5A
Authority: CN
Inventors: 孙喜军
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-07-31
Filing date: 2020-07-31
Publication date: 2020-11-03

Abstract

The invention provides anti-falling equipment for bridge engineering construction, which comprises an inner side positioning part, a cantilever part, an outer side positioning part and a pressing part, wherein the outer side positioning part can be tightly attached to the outer side surface of an anti-collision wall; the outer side positioning component can be tightly attached to the outer side surface of the anti-collision wall, the top end of the outer side positioning component is hinged to the bottom of the cantilever component, and a workbench extending towards the outer side of the bridge is fixed at the bottom end of the outer side positioning component; the outer side positioning component is further fixedly provided with a workbench extending out of the bridge, the upper surface of the workbench is provided with a fence, and the pressing component comprises a pressing plate, rollers, a traction rope and a winch. The invention has simple structure, easy manufacture and use, no influence on traffic, safety and reliability.

Description

Bridge engineering construction is with preventing equipment that falls

Technical Field

The invention relates to a falling prevention device for civil engineering construction, in particular to falling prevention equipment for bridge engineering construction.

Background

The bridge is a common structure in the traffic field, and usually, collision walls are arranged on two sides of a bridge floor, and when the bridge is overhauled, the bridge usually needs to go down from two sides and stand on a suspended workbench to inspect the condition of the bridge from the side face of the bridge, or the bridge needs to go down to the position of the side part below the bridge floor during construction. At present, for the engineering construction of bridges, a crane is generally adopted to lift a working platform to be put down from the side at a preset bridge body, the method is simple and flexible, but heavy machinery is required to be driven into a bridge floor, the traffic is influenced, and the dispatching and using cost is too high. And common wall-hanging has to hang insecurely, and the risk of falling is huge scheduling problem, consequently, at present, lacks professional anti-falling device and guarantees the personal safety of staff when the construction, especially lacks the professional equipment that can pertinence ground routine construction maintenance to the fixed position of the bridge that is equipped with the crashproof wall.

Disclosure of Invention

The invention aims to solve the problems that the anti-falling device for bridge engineering construction is provided aiming at the defects in the prior art, the anti-falling device in the prior art can influence traffic, has potential safety hazards and is high in equipment cost during construction, and the anti-falling device is particularly suitable for bridge construction with small thickness of an anti-collision wall.

In order to achieve the purpose, the invention adopts the following technical scheme:

a falling-prevention device for bridge engineering construction comprises an inner side positioning part, a cantilever part, an outer side positioning part and a pressing part, wherein the inner side positioning part can be tightly attached to the inner side surface of an anti-collision wall on the side edge of a bridge, and a first hydraulic rod is fixed on one surface of the inner side positioning part, which is far away from the anti-collision wall, and obliquely upwards towards the inner side of the bridge; the cantilever part is arranged above the anti-collision wall, one end of the cantilever part is positioned on the inner side of the bridge and is hinged with the top of the inner side positioning part, the other end of the cantilever part spans the anti-collision wall and extends out of the bridge, one side surface of the cantilever part facing the anti-collision wall can be attached to the top surface of the anti-collision wall, a sliding shaft is arranged in the cantilever part in a sliding fit manner, one end of the sliding shaft is inserted into a sliding hole of the cantilever part from the cantilever part to one end of the inner side of the bridge and is connected with the bottom of the sliding hole through an elastic element, and the other end of the sliding shaft extends out of; the outer side positioning component can be tightly attached to the outer side surface of the anti-collision wall, the top end of the outer side positioning component is hinged to the bottom of the cantilever component, a workbench extending towards the outer side of the bridge is fixed at the bottom end of the outer side positioning component, a fence is installed on the upper surface of the workbench, a cage with an open top is installed on the lower surface of the workbench, and the workbench is located right above an opening of the cage; the compressing part comprises a compressing plate, rollers, a traction rope and a winch, the compressing plate is hinged to the lower surface of one end, extending out of the bridge, of the cantilever part through an articulated shaft, one end of the compressing plate is in contact with the outer side positioning part, the other end of the compressing plate is connected to the winch through the traction rope wound on the rollers in sequence, so that the winch works by pulling the compressing plate through the traction rope, the articulated shaft is used as a fulcrum to move to compress the outer side positioning part, and the winch is installed on the upper surface of one end, located in the bridge, of the cantilever part.

During manufacturing, the inner positioning component is preferably designed as follows: the inner side positioning component comprises a first inner side sub-positioning piece, a second inner side sub-positioning piece and a second hydraulic rod which are hinged with each other, the first inner side sub-positioning piece is of a right-angled trapezoid-shaped plate body structure which can be flatly placed on the bridge, and the inclined surface of the first inner side sub-positioning piece faces to one side of the anti-collision wall; the surface of one side, facing the anti-collision wall, of the second inner side sub-positioning piece can be attached to the inner surface of the anti-collision wall, the surface of the other side of the second inner side sub-positioning piece is in a shape of a cross protruding towards the inner side of the bridge, the bottom end of the first hydraulic rod is fixed to the upper inclined plane section of the shape of the cross, and the lower inclined plane section of the first hydraulic rod can be close to the inclined plane and is finally attached to the inclined plane in the process that the two inner side sub-; the second hydraulic rod is fixedly arranged on the upper surface of the first inner side sub-positioning piece, the free end of the second hydraulic rod is hinged to the upper inclined plane section of the cross-shaped surface, a support rod is also obliquely fixed on the upper surface of the first inner side sub-positioning piece, and the support rod is fixedly connected with the surface of the hydraulic cylinder of the first hydraulic rod to support the first hydraulic rod; the second inner side sub-positioning piece comprises an upper positioning piece and a lower positioning piece which are connected through a third hydraulic rod, the upper positioning piece is hinged to the lower surface of one end, located on the inner side of the bridge, of the cantilever part, the lower positioning piece is hinged to the first inner side sub-positioning piece, and the mounting position of the third hydraulic rod needs to enable the upper positioning piece and one surface, facing the anti-collision wall, of the lower positioning piece to be coplanar all the time in the telescopic direction.

Preferably, the cantilever component is of a rectangular structure, and the inside of the cantilever component is provided with the sliding hole along the length direction; the connecting shaft of the outer side positioning component is hinged on the cantilever component and is vertically downwards fixedly connected with one positioning body of the outer side positioning component, and the connecting shaft can also be made of a hydraulic rod; one side surface of the positioning body, which is far away from the anti-collision wall, is provided with a wedge-shaped groove, and one end of the compression plate is positioned in the wedge-shaped groove and can be in embedded matching contact with the positioning body. The hard alloy layers are respectively embedded in the upper edge of the port of one end, facing the bridge, of the sliding hole and the bottom surface of one end, extending into the sliding hole, of the sliding shaft, so that the wear resistance and the strength are improved, the sliding distance of the sliding shaft in the sliding hole is limited, the sliding shaft can slide upwards in an inclined mode towards the inner side of the bridge to be lifted, the upper surface of the sliding shaft is contacted with the upper edge of the port of the sliding hole, the lower side surface, facing the outer side of one end of the bridge, of the sliding shaft is contacted with the bottom surface of the sliding hole to form interference, the sliding shaft is clamped in the cantilever component under the action of the first hydraulic rod, and the cantilever component is firmly pressed on the.

Preferably, the rollers sequentially comprise a first roller, a second roller and a third roller from top to bottom, the first roller is arranged on the upper surface of one end of the cantilever component extending out of the bridge, the second roller and the third roller are arranged in a cavity of the end of the cantilever component, and the second roller is arranged between the first roller and the third roller and is biased to one side of the sliding connecting part; the pressing plate comprises an L-shaped crutch-shaped batten, and the right-angle corner of the pressing plate is hinged to the cantilever component.

Furthermore, the inner side positioning part, the cantilever part and the outer side positioning part are all internally provided with storage bins for placing tools or are directly made into solid structures. Preferably, the cavity of the inner side positioning component is an isosceles trapezoid bin with a large upper part and a small lower part, and a taking opening or a door is arranged at the bin bottom close to the workbench. A ladder stand is penetratingly arranged on the workbench and extends into the suspension cage. The suspension cage is connected below the workbench through a plurality of steel bars. And hanging rings are fixedly connected to the upper surface of one end, facing the inner side of the bridge, of the inner side positioning component and the upper surface of one end, facing the outer side of the bridge, of the cantilever component.

Compared with the prior art, the invention has the following beneficial effects: the invention forms a clamping opening for clamping the anti-collision wall through the inner side positioning part, the cantilever part and the outer side positioning part, the anti-falling device is mainly installed by directly depending on a fixed included angle formed by the hinging motion of the inner side positioning part and the cantilever part, is similar to a lever principle, so as to install and fix the whole anti-falling device, the unique installation position of the first hydraulic rod is matched with the connecting structure of the three components, can realize automatic clamping and fixing, ensure that operating platforms such as a workbench and the like positioned outside a bridge and manned object carrying equipment are stably and reliably suspended and picked out for installation, and is characterized in that the sliding stroke of the sliding shaft is short, the sliding shaft can be clamped in the sliding hole of the cantilever part after the first hydraulic rod extends out a little length, therefore, the cantilever part is pressed and fixed, the fixed mounting action is timely and reliable, and the cantilever part is particularly suitable for mounting and fixing the anti-collision wall with small thickness. After the cantilever part of the carrier cantilever beam which is installed in a suspension mode as the outer side positioning part is firmly installed, the pressing part of the invention finally presses and fixes the outer side positioning part, so that the outer side positioning part is pressed on the anti-collision wall, the clamping opening has certain stability, the condition that the whole anti-falling device turns over due to the gravity of equipment such as a workbench and the like is avoided, and the clamping opening is safe and reliable, has simple structure, easy manufacture and lower cost, is convenient to popularize and use, and is particularly suitable for routine inspection construction of bridges with anti-collision walls.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

fig. 2 is a schematic right view of a positioning body to which a table is attached.

The anti-collision device comprises an anti-collision wall 1, an inner side positioning component 2, a first inner side positioning sub-component 201, a second hydraulic rod 202, a second inner side positioning sub-component 203, an upper positioning component 203b, a lower positioning component 203a, a third hydraulic rod 204, a first hydraulic rod 205, a support rod 206, a cantilever component 3, a rectangular pipe 301, a hard alloy layer 302, an elastic element 303, a sliding shaft 304, an outer side positioning component 4, a hinge pin 401, a connecting shaft 402, a positioning body 403, a pressing component 5, a roller 501, a traction rope 502, a pressing plate 503, a workbench 6, a fence 7, a suspension cage 8, a ladder stand 9, a suspension ring 10 and a winch 11.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the functions of the invention clearer and easier to understand, the invention is further explained by combining the drawings and the detailed implementation mode:

as shown in fig. 1, the present embodiment describes a falling prevention device for bridge engineering construction, which mainly includes an inner side positioning component 2, a cantilever component 3, an outer side positioning component 4, and a pressing component 5, wherein the inner side positioning component 2 can be tightly attached to the inner side surface of an anti-collision wall 1 on the side of a bridge, and the area of the tight attachment can be adaptively designed by those skilled in the art according to needs, and a larger area is suitable for the tight attachment, so that the effect is better. One side of the inner side positioning component 2, which faces away from the impact wall 1, is obliquely fixed with a first hydraulic rod 205 upwards towards the inner side of the bridge, and preferably, the axis position of the first hydraulic rod 205 is located on an angular bisector between the inner side surface of the impact wall 1 and the bridge floor, so as to better form stable fixing force transmission. Meanwhile, the cantilever part 3 is arranged above the anti-collision wall 1, and one end of the cantilever part is positioned on the inner side of the bridge and hinged with the top of the inner side positioning part 2, so that the inner side positioning part 2 and the cantilever part 3 form different installation included angles for fixing. Outside this cantilever part 3's the other end strideed across the bridge after crashproof wall 1, cantilever part 3 can laminate with crashproof wall 1 top surface towards one side surface energy of crashproof wall 1, and as for the area of hugging closely can the adaptive design by technical staff in the field as required, should select great area to hug closely, and the effect is better. A sliding shaft 304 is installed in the cantilever member 3 in a sliding fit manner, one end of the sliding shaft 304 is inserted into the sliding hole of the cantilever member 3 from the cantilever member 3 towards the inner side of the bridge and is connected with the bottom of the sliding hole through an elastic element 303, and the other end of the sliding shaft 304 extends out of the sliding hole and is hinged with the free end of the first hydraulic rod 205, so that the sliding shaft 304 is driven by the first hydraulic rod 205 to slide in the cantilever member 3 by a small displacement. The outer side positioning component 4 can be tightly attached to the outer side surface of the anti-collision wall 1, and similarly, the tightly attached area can be designed adaptively by a person skilled in the art according to needs, a larger area is suitable for being tightly attached, and the effect is better. The top end of the outer side positioning component 4 is hinged to the bottom of the cantilever component 3, the bottom end of the outer side positioning component is further fixed with a workbench 6 extending out towards the outer side of the bridge, a fence 7 is arranged on the upper surface of the workbench 6, a cage 8 with an open top is arranged on the lower surface of the workbench 6, and the workbench 6 is located right above an opening of the cage 8 so as to receive people or objects accidentally falling from the workbench 6 or the fence 7 when necessary. The pressing part 5 comprises a pressing plate 503, rollers 501, a traction rope 502 and a winch 11, wherein the pressing plate 503 is hinged to the lower surface of one end, extending out of the bridge, of the cantilever part 3 through a hinge shaft, one end of the pressing plate 503 is in contact with the outer side positioning part 4, the other end of the pressing plate is connected to the winch 11 through the traction rope 502 sequentially wound on the rollers 501, so that the winch 11 pulls the pressing plate 503 through the traction rope 502 during working, the hinge shaft serves as a fulcrum to do lever motion to press the outer side positioning part 4, the outer side positioning part 4 is pressed by applying pressing fixing force again, the clamping force of a clamping opening formed by the inner side positioning part and the outer side positioning part is consolidated and lifted, and a double-insurance effect of clamping and fixed installation is achieved. In addition, the winch 11 is installed on the upper surface of the cantilever member 3 at the end inside the bridge, which can reinforce the gravity moment inside the bridge, further preventing the whole construction fall-preventing device from turning outwards.

When the anti-falling device is used, a cantilever can be firstly put on the anti-collision wall 1 in a cross mode, the inner side positioning part 2 is made to be tightly attached to the inner side surface of the anti-collision wall 1, then the first hydraulic rod 205 is started to be pushed and pulled upwards in an inclined mode, at the moment, due to the sliding fit of the sliding shaft 304 and the cantilever part 3, the sliding shaft 304 moves a small section of displacement upwards in the cantilever part 3 towards the inner side of a bridge in an inclined mode, the displacement is determined according to the sliding fit clearance between the sliding shaft and the cantilever part, the larger the clearance is, the larger the displacement is, the adaptability design can be carried out according to actual requirements, for example, the sliding shaft is required to be quickly fixed and pressed, namely, when the sliding shaft 304 is quickly clamped relative to the cantilever part 3 in an. Then, the winch 11 is started, so that the pressing plate 503 which is suspended below the cantilever component 3 is firmly pressed on the anti-collision wall 1, and the positioning components on the inner side and the outer side clamp the anti-collision wall 1 from two sides to each other, so that the whole anti-falling device is installed and fixed. In view of the structure form that the first hydraulic rod 205 extends and pulls towards the inner side of the bridge obliquely upwards, the clamping opening between the inner side positioning part 2 and the cantilever part 3 is firmly clamped above the inner side of the anti-collision wall 1, the cantilever type firm installation of the cantilever part 3 is realized, and a foundation is laid for the firm installation of the outer side positioning part 4. Because the function of clamping and fixing the clamping opening is mainly realized by the clamping force of an included angle formed by the squeezing contact degrees of the inner side positioning component 2 and the cantilever component 3 with the surface of the anti-collision wall 1, the two contacts are fully ensured to be full and effective, so the bottom end of the inner side positioning component 2 is not mutually contacted with the bridge floor, namely, the inner side positioning component 2 is not suitable to be made to be long enough or high enough, the inner side positioning component 2 is prevented from touching the bottom (touching the bridge floor) when the inner side positioning component 2 and the cantilever component 3 are hinged to rotate as far as possible, and the structure is particularly suitable for the condition that the inner surface and the outer surface of the anti-collision wall 1 are vertical planes.

Based on the above embodiment, the inner positioning member 2 is designed according to the following structure: as shown in fig. 1, the inner positioning member 2 includes a first inner positioning member, a second inner positioning member and a second hydraulic rod 202 hinged to each other, the first inner positioning member is a right trapezoid-shaped plate structure capable of being flatly placed on the bridge, the inner portion of the first inner positioning member is hollow, and can be used as a working storage bin with a large capacity, a large number of tools, especially heavy tools, can be stored in the storage bin, the stabilizing force of the anti-falling device on one end of the inner side of the bridge can be increased, and the storage bin can even be placed with components such as a counterweight lead block when necessary. The inclined surface of the first inner side sub-positioning piece is arranged towards one side of the anti-collision wall 1, the surface of one side of the second inner side sub-positioning piece facing the anti-collision wall 1 can be attached to the inner surface of the anti-collision wall 1, the surface of the other side of the second inner side sub-positioning piece is in a shape of a square protruding towards the inner side of a bridge, the bottom end of the first hydraulic rod 205 is fixed to the upper inclined surface section of the square surface, and the lower inclined surface section of the first hydraulic rod can be close to and finally attached to the inclined surface in the process of mutual hinged movement of the two inner side sub-positioning pieces, so. Second hydraulic stem 202 fixed mounting is on first inboard sub-setting element upper surface, the free end of second hydraulic stem 202 articulate in the upper portion inclined plane section on "<" type surface to realize articulated rotation between two inboard sub-setting elements and fix when matching with crashproof wall 1 and bridge floor contained angle, promote whole inboard locating part 2 location, fixed mounting performance, embedded ground agrees with above-mentioned crashproof wall 1 and bridge floor contained angle, and the structure is more reliable and more stable, and anti upset power is extremely strong. Meanwhile, in this embodiment, a support rod 206 is also obliquely fixed to the upper surface of the first inner sub-positioning element, and the support rod 206 is fixedly connected to the hydraulic cylinder surface of the first hydraulic rod 205 to support the first hydraulic rod 205. The second inner side sub-positioning member comprises an upper positioning member 203b and a lower positioning member 203a which are connected through a third hydraulic rod 204, the upper positioning member 203b is hinged with the lower surface of one end of the cantilever member 3, which is positioned at the inner side of the bridge, the lower positioning member 203a is hinged with the first inner side sub-positioning member, and the installation position of the third hydraulic rod 204 needs to enable the telescopic direction of the third hydraulic rod to enable the upper positioning member 203b and the lower positioning member 203a to be always coplanar towards one surface of the anti-collision wall 1, so that the second inner side sub-positioning member can be well extended and shortened to adapt to the anti-collision walls 1 with different heights.

Based on the above embodiment, as shown in fig. 1, the cantilever member 3 is a rectangular structure, for example, a rectangular tube 301, a sliding hole is formed inside the rectangular tube along the length direction, and the connecting shaft 402 of the outer positioning member 4 is hinged to the cantilever member 3 and is vertically and downwardly fixed to one positioning body 403 of the outer positioning member 4. The connecting shaft 402 is also made of a hydraulic rod, so that the length of the outer positioning component 4 and the position of the outer positioning component close to the anti-collision wall 1 can be changed, and the connecting shaft is very suitable for the anti-collision wall 1 with a high height. Further, a wedge-shaped groove is formed in one side surface of the positioning body 403, which is away from the anti-collision wall 1, and one end of the pressing plate 503 is located in the wedge-shaped groove and can be in embedded fit contact with the positioning body 403, so that the pressing plate 503 is pressed obliquely upwards and just fits with the wedge-shaped groove to transfer force, and the outer positioning component 4 is less prone to falling and shaking. In addition, the hard alloy layer 302 is embedded in the upper edge of the port of the slide hole towards one end of the bridge, the upper surface of the slide shaft 304 and the bottom surface of the end extending into the slide hole, respectively, so as to improve the wear resistance and strength, because the slide shaft 304 in the design has a limited sliding distance in the slide hole, it can slide and lift up towards the inside direction of the bridge, so that the upper surface of the slide shaft 304 is contacted with the upper edge of the port of the slide hole, the lower side surface of the end of the slide shaft 304 towards the outside of the bridge is contacted with the bottom surface of the slide hole to form interference, and thus the slide shaft 304 is clamped in the cantilever component 3 under the action of the first hydraulic rod 205, so that the cantilever component 3 is firmly pressed on the.

Preferably, for the pressing member 5, as shown in fig. 1, the roller 501 sequentially includes a first roller 501, a second roller 501, and a third roller 501 from top to bottom, the first roller 501 is installed on the upper surface of one end of the cantilever member 3 extending out of the bridge, the second roller 501 and the third roller 501 are installed in the cavity of the end of the cantilever member 3, and the second roller 501 is located between the first roller 501 and the third roller 501 and is installed at a side offset to the sliding connection part, so as to ensure that the hauling rope 502 is reliably installed in a tensioned manner; the pressing plate 503 comprises an L-shaped crutch-shaped strip plate, and the right-angled corner of the pressing plate 503 is hinged to the cantilever component 3, so that the structural stability of lever movement is better.

Further, as shown in fig. 1, the inner positioning component 2, the cantilever component 3, and the outer positioning component 4 are all provided with storage bins for placing tools therein or are directly made into solid structures. Preferably, the cavity of the inner positioning component 2 is an isosceles trapezoid bin with a large upper part and a small lower part, and a taking opening or a door is arranged at the bin bottom close to the workbench 6. A ladder stand 9 is penetratingly arranged on the workbench 6, and the ladder stand 9 extends into the suspension cage 8 so as to facilitate the passage of people. Cage 8 passes through the steel cable and connects respectively on being located the synchronous drive's on workstation 6 electric hoist to the adjustment descends the height, can also change workstation 6 descending height in coordination with above-mentioned connecting axle 402 that the hydraulic stem made, is particularly useful for highly extremely high anticollision wall 1, rocks in order to prevent cage 8, and is more stable, can also set up the truckle with the contact of anticollision wall 1 at cage 8 lateral wall, and this kind of specially adapted anticollision wall 1 surface is the condition of vertical face. Hanging rings 10 are fixedly connected to the upper surface of one end, facing the inner side of the bridge, of the inner side positioning part 2 and the upper surface of one end, facing the outer side of the bridge, of the cantilever part 3, so that the integral hoisting can be realized when needed.

The positioning body 403 may be made into a structure as shown in fig. 2, for example, the whole body is a rectangular frame structure, and the space inside the frame body can be extended, operated or checked by the worker, and the structural size of the frame body can be designed as required. The above-mentioned table 6 can be mounted perpendicular to the frame and fixed to the bottom edge of the frame.

Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.

Claims

1. The utility model provides a bridge engineering construction is with preventing equipment that falls which characterized in that: the anti-collision device comprises an inner side positioning part, a cantilever part, an outer side positioning part and a pressing part, wherein the inner side positioning part can be tightly attached to the inner side surface of an anti-collision wall on the side edge of a bridge, and a first hydraulic rod is obliquely fixed on one surface of the inner side positioning part, which is far away from the anti-collision wall, and faces the inner side of the bridge; the cantilever part is arranged above the anti-collision wall, one end of the cantilever part is positioned on the inner side of the bridge and is hinged with the top of the inner side positioning part, the other end of the cantilever part spans the anti-collision wall and extends out of the bridge, one side surface of the cantilever part facing the anti-collision wall can be attached to the top surface of the anti-collision wall, a sliding shaft is arranged in the cantilever part in a sliding fit manner, one end of the sliding shaft is inserted into a sliding hole of the cantilever part from the cantilever part to one end of the inner side of the bridge and is connected with the bottom of the sliding hole through an elastic element, and the other end of the sliding shaft extends out of; the outer side positioning component can be tightly attached to the outer side surface of the anti-collision wall, the top end of the outer side positioning component is hinged to the bottom of the cantilever component, a workbench extending towards the outer side of the bridge is fixed at the bottom end of the outer side positioning component, a fence is installed on the upper surface of the workbench, a cage with an open top is installed on the lower surface of the workbench, and the workbench is located right above an opening of the cage; the compressing part comprises a compressing plate, rollers, a traction rope and a winch, the compressing plate is hinged to the lower surface of one end, extending out of the bridge, of the cantilever part through an articulated shaft, one end of the compressing plate is in contact with the outer side positioning part, the other end of the compressing plate is connected to the winch through the traction rope wound on the rollers in sequence, so that the winch works by pulling the compressing plate through the traction rope, the articulated shaft is used as a fulcrum to move to compress the outer side positioning part, and the winch is installed on the upper surface of one end, located in the bridge, of the cantilever part.

2. The anti-falling device for bridge engineering construction according to claim 1, wherein: the roller wheels sequentially comprise a first roller wheel, a second roller wheel and a third roller wheel from top to bottom, the first roller wheel is arranged on the upper surface of one end of the cantilever component extending out of the bridge, the second roller wheel and the third roller wheel are arranged in a cavity of the end of the cantilever component, and the second roller wheel is arranged between the first roller wheel and the third roller wheel and is deviated to one side of the sliding connecting part; the pressing plate comprises an L-shaped crutch-shaped batten, and the right-angle corner of the pressing plate is hinged to the cantilever component.

3. The anti-falling device for bridge engineering construction according to claim 1, wherein: the inside storage storehouse that is used for placing the instrument that all offers of inboard locating part, cantilever part, outside locating part, install a cat ladder with running through on the workstation, this cat ladder stretches into in the cage.

4. The anti-falling device for bridge engineering construction according to claim 1, wherein: the suspension cage is connected below the workbench through a steel rope, the steel rope is respectively connected on a synchronous drive electric hoist positioned on the workbench, and the upper surface of one end of the inner side positioning part facing the inner side of the bridge and the upper surface of one end of the cantilever part facing the outer side of the bridge are fixedly connected with hanging rings.

5. The anti-falling device for bridge engineering construction according to claim 1, wherein: hard alloy layers are respectively embedded in the upper edge of the port of one end of the sliding hole facing the bridge, the upper surface of the sliding shaft and the bottom surface of one end extending into the sliding hole.