JP6018691B1 - Suspension scaffold construction method and suspension scaffold with float in bridge structure - Google Patents

Abstract

A suspension scaffold that can be easily installed on a bridge is provided. A method for constructing a scaffold in a bridge structure, the step of preparing a suspended scaffold 1 with a float 2 fixed to a lower side of the suspended scaffold, and a suspension scaffold 1 with a float as an object to be constructed. A step of floating on the water to the lower side of the bridge structure 100 and a step of connecting the suspended scaffolding 1 with a float to the first bridge side surface on both sides of the bridge structure 100 with the first wire 26; Lifting the wire 26 and suspending the suspended suspension scaffold 1 from the bridge structure 100. [Selection] Figure 1

Description

  The present invention relates to a suspension scaffold construction method for inspection of a bridge structure and a suspension scaffold with a float.

  Structures such as bridges and tunnels need to be properly maintained and repaired after construction. That is, in order to avoid accidents due to deterioration over time, it is required that the road administrator periodically inspects the structure. In particular, the Ministry of Land, Infrastructure, Transport and Tourism started on July 1, 2014, with the fall of the Chuo Expressway Choshi Tunnel ceiling plate that occurred on December 2, 2012. Must be checked once every five years. The inspection method is based on close-up visual observation rather than conventional far-sight visual inspection.

  However, in order to perform the close visual inspection on the back side of the bridge, as shown in FIG. 20, it is necessary to assemble a scaffold 500 that allows an operator to enter the back side of the bridge structure 100, which is extremely time consuming and expensive. There is. It is said that there are about 700,000 bridges over 2m nationwide, of which about 480,000 are managed by the municipalities. There is concern that the cost of inspection will be a heavy burden.

  On the other hand, as shown in FIG. 19, by using a dedicated bridge inspection vehicle 400, the arm is pushed out from the side surface of the bridge structure 100 and turned to the back side of the bridge, thereby enabling visual inspection of the back side without assembling a scaffold. A way to do this is also conceivable. However, in this method, it is necessary to place the bridge inspection vehicle 400 on the road, and at least one lane is closed during the inspection work, which hinders traffic. In order to prevent traffic congestion, it may be possible to perform an inspection work at night. In this case, however, there is a concern that the visual workability is deteriorated and the reliability of the inspection is affected. Furthermore, for large bridges with wide bridges, such as four lanes, it is necessary to prepare a large bridge inspection vehicle that extends to the center side of the back surface, in order to stably fix such a bridge inspection vehicle. In addition, as a result of occupying a larger area on the bridge, the hindrance to traffic will be significant. In general, a bridge with a large number of lanes has a large amount of traffic, so the economic impact due to the hindrance to movement and logistics cannot be ignored. In addition, in the case of a wide bridge structure, it may be assumed that the scaffold does not reach the center of the bridge and inspection by proximity visual inspection becomes impossible.

  As described above, the conventional inspection method has problems such as traffic regulation being required, man-hours and high human costs, and a simple and inexpensive inspection method that does not interfere with traffic has not been established. . In particular, in areas where there are many bridge structures to be inspected, there is a concern that the cost will rise, and budget creation becomes a social problem, and a simple and inexpensive inspection method is required.

  On the other hand, for example, Patent Documents 1 and 2 describe a scaffold that can be used for maintenance of a water structure that can be moved on the water. However, for example, the scaffold of Patent Document 1 has a predetermined height, and cannot be used for inspection of a bridge structure having an extremely different height from the scaffold. On the other hand, although the scaffold of Patent Document 2 has a variable height, it is necessary to dip the spud can into the bottom of the water. For example, it cannot be used when the bottom of the water is concrete or rock, or the water depth is deeper than expected. There's a problem. Furthermore, any of the patent documents has a problem that it is necessary to occupy the surface of the water during the inspection, and there is a restriction on the traffic of the ship. Furthermore, since the size is also determined in advance, it cannot be used depending on the form of the river or bridge girder, and furthermore, it is difficult to carry on land.

JP-A-10-25731 JP 2000-320131 A JP 2001-248298 A

  The present invention has been made in view of the above problems. An object of the present invention is to provide a suspension scaffold erection method in a bridge structure that can be easily used, and a suspension scaffold with a float used for the erection.

Means for Solving the Problems and Effects of the Invention

In order to solve the above-described problem, a suspension scaffold erection method in the first bridge structure according to the present invention includes a suspension scaffold with a float in which a float part is fixed to a lower side of the suspension scaffold part. A step of preparing a plurality of suspension scaffolds according to the width of the object, a step of floating the suspended scaffold with a float to the lower part of the bridge structure to be constructed, and moving the suspended scaffold with the float in the longitudinal direction Lifting from the water surface toward the back of the bridge so that the width of the bridge structure matches the width of the bridge structure, and connecting the suspended scaffold with floats to the first bridge side surface on both sides of the bridge structure with the first wire; , raising the first wire, the step of suspending the float with suspended scaffold bridge structure, after the float with suspended scaffold suspended bridge structure, the bridge girder fixture provided in a scaffold hanging with the float More, and a step of fixing the float with suspended scaffold in a part of the bridge structure.

  According to the above construction method, it can be arranged below the target bridge structure by a simple method. In particular, unlike existing structures, it is not necessary to wait for scaffolds and frames before assembling on a road or water carrier on a bridge structure, so a suspended scaffold should be constructed without blocking the bridge structure or water for a long time. Can do. Furthermore, since the suspension scaffold can be easily constructed in a short time, the human cost can be reduced. Further, by connecting the suspension scaffold with a float, the entire length of the suspension scaffold can be easily adjusted according to the width of the bridge structure to be constructed.

Furthermore , according to the above construction method, since the suspended scaffold with a float can be mechanically fixed to a part of the bridge girder, it is possible to suppress shaking due to wind and vibration during work, stabilize the scaffold, and perform the work safely.

Further , in the second method for suspending a suspended scaffold in the bridge structure according to the present invention, after the suspended scaffold with a float is further suspended from the bridge structure, the suspended scaffold with a float is moved in the longitudinal direction of the bridge structure. Including the step of

Further , according to the third method of suspending a suspended scaffold in the bridge structure of the present invention, the step of moving the suspended scaffold with a float in the longitudinal direction of the bridge structure is provided on both sides of the bridge structure, The step of connecting the suspension scaffold with a float with the second wire to the side position of the second bridge that is separated in the moving direction of the suspension scaffold with a float when viewed from the side of one bridge, and loosening the first wire while lifting the second wire Moving the attached suspension scaffold from the first bridge side face position toward the second bridge side face position.
According to the above construction method, the suspended suspension scaffold with float can be easily moved over the entire length of the bridge structure. In addition, the number of operations can be reduced because the scaffold can be moved while hung on the bridge structure without being lowered on the water during the movement.

Furthermore, the fourth method for constructing a suspension scaffold in a bridge structure according to the present invention is a method for constructing a suspension scaffold in a bridge structure, wherein a suspension scaffold with a float having a float portion fixed to the lower side of the suspension scaffold portion is provided. A step of preparing one to a plurality according to the width of the bridge structure to be constructed; and a step of floating and moving the suspended scaffold with a float to the bottom of the bridge structure to be constructed; and Lift the suspension scaffold with float so that its longitudinal direction matches the width of the bridge structure from the water surface toward the back of the bridge, and suspend the suspension scaffold with float at the first bridge side surface on both sides of the bridge structure. A step of connecting a scaffold with a first wire, a step of lifting the first wire and suspending the suspended scaffold with a float on a bridge structure, and suspending the suspended scaffold with a float on the bridge structure Moving the suspension scaffold with float in the longitudinal direction of the bridge structure, and moving the suspension scaffold with float in the longitudinal direction of the bridge structure on both sides of the bridge structure, Connecting the suspended scaffold with a float to the second bridge side face spaced apart in the moving direction of the suspended scaffold with respect to the first bridge side face position, loosening the first wire, Pulling up the wire and moving the suspension scaffold with float from the first bridge side face position to the second bridge side face position.
According to the above construction method, the suspended suspension scaffold with float can be easily moved over the entire length of the bridge structure. In addition, the number of operations can be reduced because the scaffold can be moved while hung on the bridge structure without being lowered on the water during the movement.

  Furthermore, in the fifth method for suspending a suspension scaffold in a bridge structure according to the present invention, when the suspension scaffold with a float and the bridge structure are connected by the second wire, the first wire for lifting is connected to one end of the second wire. A step of connecting the two power parts.

  According to the above construction method, the second wire can be easily pulled up by the second power unit, and the process of moving to the second bridge side surface position can be performed easily and in a short time.

  Furthermore, in the sixth method for suspending a suspended scaffold in a bridge structure, when the suspended scaffold with a float and the bridge structure are connected with the first wire, the first wire for lifting is connected to one end of the first wire. Connecting a power unit.

  According to the above construction method, the first wire can be easily pulled up by the first power unit, and the process of suspending the suspension scaffold with float or moving it toward the second bridge side surface can be performed in a simple and short time. It can be carried out.

Furthermore, the seventh suspended scaffold with a float according to the present invention is a scaffold provided on the back side of the bridge structure in a posture in which the longitudinal direction thereof matches the width of the bridge structure, and has a float part having buoyancy. A suspended scaffolding part provided on the upper surface of the float part and having a plate-like scaffolding plate part to which an operator can move, a fence part covering the periphery of the scaffolding board part, and both ends of the floating part and / or the suspended scaffolding part The wire connection portion provided on the suspension portion, and the fence portion is provided with a suspension scaffold coupling portion for coupling with another suspension scaffold with a float .
According to the said structure, the suspension scaffold with a float can be connected and the full length of a suspension scaffold with a float can be adjusted according to the width | variety of a bridge structure. Thereby, the suspension scaffold with a float of this invention can be utilized for bridge structures of various width.

According to the above configuration, the suspension scaffold with a float is moved from the water to the lower part of the bridge structure, and the suspension structure is easily installed on the bridge structure by connecting the bridge structure and the wire connection portion with a wire. Can do. As a result, there is no need to put the scaffolding and framework before assembly on a road on a bridge structure or a water carrier, so a suspension scaffold can be constructed without blocking the bridge structure or water for a long time. Can do. Furthermore, since the suspension scaffold can be easily constructed in a short time, the human cost can be reduced.
Furthermore, the suspension scaffold construction method in the eighth bridge structure according to the present invention is a suspension scaffold with a float to be provided on the back side of the bridge structure in a posture in which the longitudinal direction thereof matches the width of the bridge structure. A suspension part having a float part having buoyancy, a flat scaffolding plate part provided on an upper surface of the float part and movable by an operator, and a fence part covering the periphery of the scaffolding board part, comprising a wire connecting portion provided at both ends of the float and / or suspended scaffold portion, and a bridge girder fixture for fixing the float with suspended scaffolding girder.
According to the above configuration, the suspension scaffold with a float is mechanically fixed to the bridge girder by the bridge girder fixing device, so that it is possible to suppress shaking due to wind and vibration during work, stabilize the scaffold, and perform the work safely.

Furthermore, in the ninth suspended scaffold with float according to the present invention, the float portion includes a float material having buoyancy and a float outer peripheral plate covering the periphery of the float material, and the float material is made of synthetic foamed resin.

  According to the said structure, a lightweight float material can be manufactured cheaply.

Furthermore, in the tenth suspension scaffold with float according to the present invention, the float outer peripheral plate and / or the suspension scaffold part is made of aluminum.

  According to the said structure, since it is made from aluminum, it is lightweight and can be conveyed even with a small number of people.

Furthermore, the eleventh suspended suspension scaffold according to the present invention includes a power section that pulls the wire at one end of the wire that connects the wire connection section and the bridge structure.

  According to the said structure, a suspension scaffold with a float can be raised / lowered freely by a power part.

Furthermore, the twelfth floated suspension scaffold of the present invention comprises a control device for electrically controlling the power section that can be operated from the suspension scaffold section.

  According to the above configuration, since the suspended scaffold with float can be lifted and lowered with the visual observation of the worker, it is easy to adjust to a suitable height according to the construction position and work content.

  Furthermore, the thirteenth suspended suspension scaffold according to the present invention includes a towing connection portion for towing the suspended suspension scaffold in a floating state.

  According to the said structure, the boat etc. provided with the outboard motor can be connected, and the suspension scaffold with a float can be towed to under the bridge to be examined.

Furthermore, the fourteenth suspended suspension scaffold according to the present invention is detachably fixed to the lower surface of the suspended scaffold portion.

  According to the said structure, when lifting a suspension scaffold with a float toward the lower surface of a bridge structure from a water surface, it becomes possible to achieve weight reduction by removing and lifting a float part.

FIG. 1 is a front view showing a suspended scaffold according to Embodiment 1 of the present invention. FIG. 2 is a perspective view showing a suspended scaffold with a float according to Embodiment 1 of the present invention. FIG. 3 is a perspective view showing the float portion according to Embodiment 1 of the present invention. 4 is a cross-sectional view taken along line IV-IV in FIG. FIG. 5 shows a modification of the float unit according to the first embodiment of the present invention. FIG. 6 is a perspective view showing a state in which the outboard motor is attached to the float unit according to the first embodiment of the present invention. FIG. 7 is a perspective view showing a suspended scaffolding according to Embodiment 1 of the present invention. FIG. 8 is an exploded view of the suspended scaffold with float according to Embodiment 1 of the present invention. FIG. 9 is a perspective view showing a state in which a wire and a winch are connected to a suspended scaffold with a float according to Embodiment 1 of the present invention. FIG. 10 is a flowchart showing a construction method according to Embodiment 1 of the present invention. FIG. 11 is a cross-sectional view showing a method for connecting a suspended scaffold with a float according to Embodiment 1 of the present invention. FIG. 12A is a plan view showing a method for connecting a suspended scaffold with a float according to Embodiment 1, and FIG. 12B is a view of FIG. 12A as viewed from the front. FIG. 13A is a diagram illustrating a water movement process according to the first embodiment. FIG. 13B is a diagram illustrating a wire connection process according to the first embodiment. FIG. 13C is a diagram illustrating a pulling process according to the first embodiment. FIG. 14A is a side view of FIG. 13A. FIG. 14B is a side view of FIG. 13B. FIG. 14C is a side view of FIG. 13C. FIG. 15A is a side view showing one state of the movement process under the bridge according to the first embodiment. FIG. 15B is a side view showing one state of the movement process under the bridge according to the first embodiment. FIG. 15C is a side view showing one state of the movement process under the bridge according to the first embodiment. FIG. 15D is a side view showing one state of the movement process under the bridge according to the first embodiment. FIG. 16 is a perspective view showing a bridge girder fixing device according to the second embodiment. FIG. 17A is a front view showing a state in which a suspended scaffold with a float according to Embodiment 2 is fixed to a bridge girder, and FIG. 17B is an enlarged view of a main part of FIG. 17A. FIG. 18 is a perspective view showing a state in which a suspended scaffold with a float according to Embodiment 3 is fixed to a bridge girder. FIG. 19 is a diagram showing a method for inspecting a bridge structure using a conventional bridge inspection vehicle. FIG. 20 is a diagram showing a conventional method for inspecting a bridge structure using a suspended scaffold.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the embodiment described below is an example for embodying the technical idea of the present invention, and the present invention is not limited to the following. Moreover, this specification does not specify the member shown by the claim as the member of embodiment. In particular, the dimensions, materials, shapes, relative arrangements, and the like of the component parts described in the embodiments are not intended to limit the scope of the present invention only to specific examples unless otherwise specified. Only. Note that the size, positional relationship, and the like of the members shown in each drawing may be exaggerated for clarity of explanation. Furthermore, in the following description, the same name and reference sign indicate the same or the same parts, and detailed description will be omitted as appropriate. Furthermore, each element constituting the present invention may be configured such that a plurality of elements are constituted by the same member and the plurality of elements are shared by one member, and conversely, the function of one member is constituted by a plurality of members. It can also be realized by sharing.
(Embodiment 1)

The suspended scaffold with float according to Embodiment 1 of the present invention is used for inspecting the back side of a bridge structure. In other words, the suspension scaffold can be installed below the bridge structure by a simple method so that the operator can visually inspect the back side of the bridge structure. As shown in FIG. 1, the suspension scaffold according to the first embodiment has a bridge structure in which the first wire 26 is connected and pulled up by towing the water on the bottom of the bridge structure 100 with a boat 200 or the like. A close visual inspection of the back side of the object 100 can be performed. This suspension scaffold is formed by connecting a plurality of suspension scaffolds 1 with floats to be described below. The pier 103 illustrated in FIGS. 1 and 13A to 15D is a part of the bridge structure 100. 1 and 13A to 13C are shown for easy understanding of the shape of the bridge structure 100. In FIGS. 1 and 13A to 13C, it seems that the suspended scaffolding 1 with the float is located on the same plane, but actually, it is separated from the suspended scaffolding 1 with the float as shown in FIGS. 14A to 15D. ing.
(Suspended scaffold with float 1)

A suspended scaffold 1 with a float shown in FIG. 2 includes a float part 2 and a suspended scaffold part 4. This suspended scaffold 1 with a float can be floated on the water by the float part 2. Furthermore, the suspended scaffolding part 4 is connected by the first power side wire 53 and the first wire 26 of the first power part 50 for lifting installed in the bridge structure, and the first power part 50 connects the first wire 26. By pulling up, it can be hung on a bridge structure as a suspension scaffold. Furthermore, this suspension scaffold 1 with a float can be connected with other suspension scaffolds 1 with a float in the longitudinal direction, and the overall length of the suspension scaffold can be adjusted according to the width of the bridge structure to be constructed.
(Float part 2)

FIG. 3 shows a perspective view of the float unit 2. 4 is a vertical sectional view taken along line IV-IV in FIG. The float part 2 includes a float material 10 having buoyancy and a float outer peripheral plate 11 covering the periphery of the float material 10.
(Float material 10)

The float material 10 has a buoyancy that can float on the water in a state where at least components such as the float part 2 and the suspension scaffold part 4 and the weight of the worker are added. In the first embodiment, the float material 10 uses a foamed synthetic resin formed in a rectangular parallelepiped. For example, polystyrene foam can be used as the foamed synthetic resin. The float material 10 only needs to be able to float on water, and the material and shape are not particularly specified. In addition to the foamed synthetic resin, for example, a metal material or a resin material having a hollow interior can be used. FIG. 5 is a view showing a float part 2 ′ which is a modification of the float part 2. As shown in the vertical sectional view of FIG. 5, the float part 2 may be a float part 2 ′ formed by laminating a plurality of float materials 10 ′ or by arranging them in the horizontal direction. By using a plurality of float materials 10 ′, the total volume of the float materials 10 ′ can be easily increased and the buoyancy can be improved.
(Float outer peripheral plate 11)

  As shown in FIGS. 3 and 4, the float portion 2 is configured by covering the periphery of the float material 10 with a float outer peripheral plate 11. The float outer peripheral plate 11 is made of a lightweight metal member such as aluminum. The float outer peripheral plate 11 is preferably lightweight, but the member is not specified as long as the float portion 2 can maintain a floating state on the water, and may be made of a metal other than aluminum such as iron. In addition, for example, resin or wood may be used. The float outer peripheral plate 11 protects the float material 10 from impacts, floating matters on the water, and the like. Moreover, the float outer peripheral board 11 is provided with the suspension scaffold fixing | fixed part 12 for fixing with the suspension scaffold part 4. FIG. Furthermore, the float outer peripheral plate 11 includes a towing connecting portion 13 that can be connected to another float portion 2 or the boat 200. Furthermore, each surface of the float outer peripheral plate 11 has a net shape except for the outer edge portion, thereby protecting the float material 10 while reducing the weight. The float outer peripheral plate 11 preferably covers the entire surface of the float material 10, but may cover only a part of the surface for weight reduction.

In the first embodiment, the float portion 2 is formed by the float material 10 and the float outer peripheral plate 11. However, a plate material such as a resin plate or a metal plate is formed in a rectangular parallelepiped shape, and the interior is hollow and floats on the water. Thus, you may form the float part 2 with a single member. Alternatively, an intervening layer such as a layer for absorbing an impact or a layer for protecting the surface of the float material 10 may be provided between the float material 10 and the float outer peripheral plate 11. Furthermore, you may provide the floating body different from the float material 10 in order to improve a buoyancy.
(Connection of outboard motor 210)

As shown in FIG. 6, the suspended scaffold fixing portion 12 of the float outer peripheral plate 11 can also be used as an attachment destination of the outboard motor 210 instead of attaching the fence portion 21. By attaching the outboard motor 210, the float unit 2 can be towed instead of the boat 200 shown in FIG. 1 or FIG. 13A. The float part 2 to which the outboard motor 210 is attached is connected to the other float part 2 by being connected by the towing connecting part 13. A rope, a chain, a jig, or the like can be used to connect the float portion 2.
(Suspended scaffolding 4)

FIG. 7 shows a perspective view of the suspended scaffold part 4. The suspended scaffolding part 4 includes a scaffolding plate 20 that serves as a scaffolding for workers and a fence part 21 that covers the periphery of the scaffolding plate 20. This suspended scaffold part 4 is fixed to the upper part of the float part 2.
(Scaffold board 20)

A scaffold plate 20 shown in FIG. 7 is a plate-like member on which an operator rides and works. A lightweight aluminum material is preferable, but if the strength is sufficient, the material is not specified. As shown in FIG. 2, the scaffold board 20 is extended | stretched rather than the length of the longitudinal direction of the float part 2, and when the suspended scaffolds 1 with a float are connected, the scaffold boards 20 can be arrange | positioned without gap. . As shown in FIG. 7, the scaffold plate 20 is provided with a plurality of anti-slip holes 29, and the periphery of the anti-slip holes 29 is raised. This anti-slip hole 29 makes it possible to reduce the weight of the scaffolding plate 20 and further prevent the operator from sliding the foot.
(Fence part 21)

  The suspension scaffold part 4 shown in FIG. 7 includes a fence part 21 so as to cover the four sides of the upper surface of the scaffold plate 20. The fence part 21 is a fence for preventing a worker from falling. As for this fence part 21, the upper end surface and the both end surfaces of a longitudinal direction are open | released. Thereby, when erected on the bridge structure, the worker can take the body out from the upper part and inspect the back side of the bridge structure. Moreover, since both end surfaces are open | released, it can move on the scaffold board | plate part 20 to another suspension scaffold with a float. In the first embodiment, lightweight aluminum is used for the fence portion 21. Although the fence part 21 is preferably a lightweight member, the material is not particularly specified as long as it has sufficient strength.

  Further, a fence fixing fastening hole 31 for connecting the suspended scaffold part 4 and the float part 2 is provided at the lower end of the fence part 21. As shown in the exploded view of FIG. 8, the fence portion 21 and the float portion 2 are fixed by bolts 30. Thereby, the float part 2 and the suspension scaffold part 4 can be utilized as the integral suspension scaffold 1 with the float.

  Furthermore, the suspension scaffold connecting portions 22a and 22b are provided at both ends in the longitudinal direction of the fence portion 21 shown in FIG. 7 so as to protrude from the length in the longitudinal direction of the float portion 2, respectively. The upper half of the suspended scaffold connecting portion 22a protrudes from the lower half, and the lower half of the suspended scaffold connecting portion 22b protrudes from the upper half. Thereby, when connecting the suspended scaffold 1 with the float, by engaging the unevenness of the suspended scaffold connecting portions 22a and 22b, the range of the swing can be limited even on the water that is likely to swing up and down. Is easy to connect. In addition, the suspension scaffold coupling parts 22a and 22b are connected to the suspension scaffold coupling part 22a or 22b of the other suspended suspension scaffold 1 with the first fence connection hole 23 as an end face and the second fence connection hole 24 as a side face, respectively. Prepare.

  Furthermore, the fence part 21 is reinforced by the diagonal material 28 in order to support the load concerning the suspension scaffold 1 with a float, when it suspends to the bridge structure 100. FIG. The diagonal member 28 is a reinforcing material provided in an oblique direction from the central upper portion of the fence portion 21 toward the lower ends of both ends. The slanting member 28 improves the durability of the fence portion 21 against the force applied in the vertical direction of the fence portion 21 when the suspended suspension scaffold 1 is suspended.

When the above-mentioned fence part 21 connects the suspended scaffold 1 with a float to form a suspended scaffold, a string-like body, a rod-like body, etc. are disposed on the open end faces of the fence part 21 at both ends of the suspended scaffold. However, it is preferable to prevent the worker from falling from the end face.
(Wire connection part 25)

  The fence portion 21 includes wire connection portions 25 in the vicinity of both ends in the longitudinal direction. When the suspended scaffold 1 with a float is suspended from the bridge structure 100, one end of the first wire 26 is connected to the wire connecting portion 25 as shown in FIG. 9, and the other end of the first wire 26 is connected to the bridge structure. It is connected to a first hook 51 provided at the tip of a first power side wire 53 extending from a first power unit 50 for lifting installed on 100.

  For example, an electric winch can be used for the first power unit 50. By pulling up with the first power unit 50, the height of the suspension scaffold can be freely operated. The first power unit 50 includes a control device 52 for instructing driving / stopping of power. As this control device, a device that electrically transmits a signal, such as a wired console or a wireless remote controller, can be used. One control device 52 may be provided for each first power unit 50, but it is preferable that a plurality of first power units 50 be linked and operated by one control device 52. Thereby, operation | movement of the 1st power part 50 connected to the both ends of a suspension scaffold can be synchronized, and a suspension scaffold can be pulled up safely.

  In the present embodiment, the first power unit 50 is installed in the bridge structure 100. For example, the first power unit 50 is directly attached to the float unit 2 or the suspension scaffold unit 4, and the first hook 51 side is connected to the bridge. You may fix to a part of structure 100. FIG.

In addition, when the number of suspension scaffolds 1 with floats is small and the total weight is sufficiently light, the first power unit 50 is not installed, and workers on the bridge structure 100 and workers on the suspension scaffolds The suspension scaffold may be manually pulled up with a tool that pulls up the first wire 26.
(Construction of scaffolding according to Embodiment 1)

  A method of constructing the suspension scaffold with a float 1 as described above will be described in the order of steps shown in the flowchart of FIG. 11 and 12 are diagrams showing a connecting step. Moreover, FIG. 13A-C is a front view which respectively shows from a water movement process to a raising process, and FIG. 14A-C is the figure which looked at FIG. 13A-C from the side, respectively. Further, FIGS. 15A to 15D are diagrams showing a moving process.

The suspension scaffolding method includes a step S101 which is a step of preparing the suspension scaffold 1 with a float, a step S102 which is a step of connecting the suspension scaffold 1 with a float, and the suspension scaffold 1 with a float floating on the water. Step S103, which is a process of moving below 100, Step S104, which is a process of connecting the bridge structure 100 and the suspension scaffold with a wire, and Step S105, which is a process of lifting the first wire 26 and pulling it up to the bridge structure 100. And step S106 which is a process of moving in the longitudinal direction of the bridge structure 100 in a suspended state.
(Preparation process)

First, in step S101, as shown in FIG. 8, the suspension scaffold 4 is fixed to the float 2 and one or more suspension scaffolds 1 with floats are prepared according to the width of the bridge to be erected.
(Linking process)

  Next, the connection process of step S102 will be described. In this connecting step, the suspended suspension scaffold 1 prepared in step S101 is connected to form a suspended scaffold.

  FIGS. 11 to 12B are diagrams showing a method of connecting the suspension scaffold connection portion 22a of the fence portion 21 of the suspension scaffold 1 with float and the suspension scaffold connection portion 22b ′ of the fence portion 21 ′ of another suspension scaffold with float. is there. FIG. 11 shows a connection method in the vertical sectional view of the fence portion 21 taken along the line XI-XI in FIG. FIG. 12A is a plan view showing a method of connecting the scaffold connecting portions 22a and 22b ′, and FIG. 12B is a view of FIG. 12A as viewed from the side. In addition, since the fence part 21 'and the suspension scaffold connection parts 22a' and 22b 'have the same form as the fence part 21 of the suspension scaffold 1 with a float, detailed description is omitted.

  First, as shown in FIG. 11, the concavo-convex portions of the suspension scaffold coupling portions 22a and 22b 'are engaged with each other and connected to the first rail connection holes 23 provided on the respective end faces through bolts 40.

  Next, as shown in FIGS. 12A and 12B, the second fence connection holes 24 provided above and below the suspension scaffold coupling portions 22 a and 22 b ′ are sandwiched from both sides by the connection plates 42 and connected by bolts 41.

  With the above method, the suspended scaffold 1 with a float of Embodiment 1 can be connected. The number to be linked can be linked to the width of the bridge structure, and by adjusting the overall length of the suspension scaffold, it is possible to cope with bridge structures of various sizes.

  This connection process may be mixed with the following water movement process. For example, it is possible to prepare two suspension scaffolds connected to half of the necessary number during berthing and move the bottom of the bridge structure and then connect the two suspension scaffolds.

In addition, when the length of the suspension scaffold 1 with a float is sufficient with respect to the width | variety of a bridge structure, this connection process may be abbreviate | omitted.
(Water movement process)

Next, the water movement process of step S103 will be described. If the suspended scaffold 1 with a float is connected as mentioned above, the water movement process of step S102 will be performed. FIG. 13A is a front view showing a water movement process, and FIG. 14A is a side view of FIG. 13A. In the water movement step, the suspended suspension scaffold 1 is floated on the water as shown in FIGS. 13A and 14A and moved to below the bridge structure 100 to be inspected. In order to move, the boat 200 can be connected to the towing connection part 13 provided in the float part 2 and towed. Further, as shown in FIG. 6, instead of the boat 200, the outboard motor 210 may be attached to the float unit 2 to be self-propelled. In addition, you may move by human power, such as using oars. In this specification, towing is not limited to the case of moving by pulling on the water, but includes the case of moving by pushing.
(Wire connection process)

Furthermore, the wire connection process of step S104 will be described. After moving to a predetermined position as described above, the wire connection process of step S104 is performed next. In the wire connection process, as shown in FIGS. 13B and 14B, the first power parts 50 are respectively installed at the first bridge side surface positions 101a on both sides of the bridge structure 100, and the suspension scaffold 1 with the floats at both ends of the suspension scaffold is installed. The first wire 26 is attached to the wire connecting portion 25, and the first power portion 50 and the first wire 26 are connected by the first hook 51 attached to the tip of the first power side wire 53 extending from the first power portion 50. To do. Here, the first bridge side surface position 101a is a side surface of the bridge structure, and indicates a position where the suspension scaffold is first suspended and the inspection is started. For example, a part of the bridge structure 100 such as the balustrade 104 can be used as a destination where the first power unit 50 is installed.
(Pulling process)

  Furthermore, the step S105 pulling process will be described. In the lifting process, the suspension scaffold connected to the bridge structure 100 in step S104 is driven by pulling the suspension scaffold from the water surface toward the back of the bridge as shown in FIGS. 13C and 14C. The suspension scaffold can be suspended from the bridge structure 100. At this time, it is preferable to pull up until the upper end of the fence portion 21 of the suspended scaffold 1 with a float contacts the bridge girder 102 of the bridge structure 100. By making the fence part 21 and the bridge girder 102 contact each other, the suspended suspension scaffold 1 can be stabilized, and the suspension scaffold can be prevented from shaking due to wind or vibration during operation. Moreover, it is preferable that the control apparatus 52 which can operate the 1st power part 50 in the case of a raising process is provided so that it can operate from on a suspension scaffold. By enabling the first power unit 50 to be operated from the suspension scaffold, the worker can sequentially confirm the relative positions of the suspension scaffold and the bridge girder 102 during the upward movement of the suspension scaffold 1 with a float. It becomes easy to adjust to an appropriate height according to the installation position and work content.

However, when the total weight of the suspension scaffold is sufficiently light, the suspension scaffold may be pulled up manually or manually using a tool without using power.
(Transfer process under the bridge)

  Furthermore, step S106 in which the suspension scaffold suspended in step S105 is moved in the length direction of the bridge structure will be described. FIGS. 15A to 15D are views of one state of the method of moving the suspended scaffold as seen from the side. 15A to 15D, the traveling direction of the suspended scaffolding is on the right side. In the following moving method, in addition to the first power unit 50 and the first wire 26, the second power unit 50 'and the second wire 26' are used.

  First, as shown in FIG. 15A, the suspension scaffold is connected to the first power unit 50 installed on the balustrade 104 at the first bridge side surface position 101a by the pulling process in step S105. Next, the second power unit 50 ′ is installed on the balustrade 104 at the second bridge side surface position 101b in the direction desired to move as viewed from the first bridge side surface position 101a, and the second wire 26 ′ is connected to the wire connecting unit 25, the second It connects with 2nd hook 51 'provided at the front-end | tip of 2nd power side wire 53' of power part 50 '.

  Next, as shown in FIG. 15B, the first power side wire 53 is loosened by the first power unit 50 and at the same time the second power side wire 53 ′ is drawn by the second power unit 50 ′, so that the suspension scaffold advances. Move in the direction. The first power unit 50 and the second power unit 50 ′ are preferably linked and driven by the control device 52. This is because the suspension scaffold can be moved while maintaining a horizontal state.

  When the first power side wire 53 is loosened by the first power unit 53 and the second power side wire 53 'is continuously pulled, the suspension scaffold moves to the second bridge side surface position 101b as shown in FIG. 15C. When the suspension scaffold moves to below the second bridge side surface position 101b, the first power unit 50 and the second power unit 50 'are stopped.

  When the suspension scaffold moves below the second bridge side surface position 101b, the direction in which the first power unit 50 is removed from the balustrade 104 at the first bridge side surface position 101a as shown in FIG. The first power unit 50 is attached to the third bridge side surface position 101c.

  Thereafter, the bridge structure 100 is suspended with a float in the length direction by repeating the same method as the third bridge side face position 101c, the fourth bridge side face position (not shown), the fifth bridge side face position (not shown),. The scaffold 1 can be moved, and the back side of the bridge structure 100 can be sequentially inspected and inspected at each position. When there is a pier 103, when the pier 103 is reached, the suspension scaffold is lowered onto the water, and the first hook 51 and the second hook 51 ′ are removed from the first wire 26 and the second wire 26 ′, respectively. It is possible to continue the inspection without separating the connected suspension scaffolds by moving to the next bridge side position.

  However, in the above construction method, the worker operates the first power unit 50 and the second power unit 50 ′ from the suspension scaffold on the suspension scaffold. The power unit 50 ′ may be operated, and may be lifted or moved under the bridge without a worker on the suspension scaffold. For example, by providing a ladder, a rope, or the like between the suspension scaffold and the bridge, the worker can freely go to and from the suspended suspension scaffold. After the worker climbs on the bridge using a ladder, etc., the suspension scaffold can be returned to the water safely by operating the first power unit 50 or the second power unit 50 'from the bridge, or the bridge structure. You can move behind the object.

  Moreover, the above erection method is an example, and the back side of the bridge structure may be inspected by suspending a suspended scaffold by another process. For example, two or more suspension scaffolds are prepared in the connecting step, an operator on the bridge fixes the first suspension scaffold to the first bridge side surface position 101a, and an operator on the suspension scaffold Inspect the back of the. Next, while the worker on the suspension scaffold is inspecting at the first bridge side surface position 101a, the worker on the bridge fixes the second suspension scaffold at the second bridge side surface position 101b. Upon completion of the inspection at the first bridge side surface position 101a, the worker on the first suspension scaffold moves to the bridge by a ladder or the like provided on the first suspension scaffold, and the second suspension scaffold. Move to the second suspension scaffold by a ladder or the like. While the worker on the suspension scaffold is inspecting the back side of the bridge structure at the second bridge side face position 101b, the worker on the bridge lowers the first suspension scaffold onto the water, and the third bridge side face position 101c. To secure the suspension scaffold. Similarly, the third bridge side face position 101c, the fourth bridge side face position, the fifth bridge side face position, etc. can be inspected. In this erection method, while the worker on the suspension scaffold is inspecting, the worker on the bridge can construct the suspension scaffold at the next bridge side surface position, so the work time can be shortened. .

  According to the suspension scaffold construction method and the suspension scaffold 1 with the float described above, the suspension scaffold 1 with the float is connected at the pier or shallow water, moved to under the bridge structure to be inspected, and the first wire 26 and the first power The suspension scaffold can be easily constructed under the bridge structure by suspending it at the portion 50. Furthermore, concerns that hinder traffic and ship operations are eliminated. In addition, the construction method is simple and the removal is easy as well, so that the work period can be greatly reduced. Therefore, there is no need to put the scaffold and frame before assembly on a road on a bridge structure or a water carrier, and it is possible to construct a suspended scaffold without stopping the operation on the bridge structure or on the water for a long time. is there.

  Further, at the time of suspension and movement, at least personnel operating the first power unit 50 and the second power unit 50 ′ on the suspension scaffold, and the first power unit 50 and the second power unit at the bridge side surface position on the bridge. If there are personnel to attach 50 ', the suspension scaffold can be moved. As described above, since the bridge structure can be inspected with the minimum number of personnel, the human cost can be suppressed.

  Furthermore, since it consists of the float material 10 which consists of a foaming synthetic resin, the float outer peripheral board 11 formed with lightweight members, such as aluminum, and the suspension scaffold part 4, it is lightweight as a whole and can be easily conveyed by a small number of people. it can.

  Furthermore, since the connection is released when not in use and the float part 2 and the suspension scaffold part 4 are disassembled, they do not become bulky at the time of storage or transportation.

The suspension scaffold erection method and the suspended suspension scaffold 1 described above are optimal for inspection of bridge structures over water, but may be used for inspection of bridge structures on the land and elevated roads. In that case, instead of moving on the water, the suspension scaffold 1 with the float is transported to the bottom of the inspection object using a vehicle, a truck, etc., and then connected and suspended in the same process as the bridge structure on the water. It can be performed.
(Embodiment 2)

In the first embodiment, the example in which the suspended scaffold 1 with a float is fixed by the first wire 26 has been described. However, the present invention is not limited to this configuration, and the suspended scaffolding portion 1 with a float can be fixed to a part of the bridge structure using the bridge girder fixing tool 60. Such an example will be described below as Embodiment 2 with reference to FIGS. 16 to 17B.
(Construction method of Embodiment 2)

  The erection method according to the second embodiment is an erection method that can be suitably used for a bridge structure using a member having a flange portion such as H steel, angle steel, or grooved steel in a bridge girder. The erection method of Embodiment 2 further includes a step of connecting a bridge girder fixing tool 60 for fixing the fence 21 of the suspension scaffolding and the bridge girder 102 of the bridge structure 100 after the lifting step. FIG. 17A is a view showing a state in which the suspension scaffold is fixed to the bridge girder 102 by the bridge process tool 60, and FIG. 17B is an enlarged view of a main part of FIG. 17A. The bridge girder fixing tool 60 fixes the fence 21 of the suspension scaffold and the flange portion of the bridge girder 102 in a sandwiched state. In this step, the bridge girder fixing tool 60 is fixed to at least one of the fence portions of the suspension scaffold. Preferably, the bridge structure 100 is fixed to the fence portion 21 of the suspension scaffold 1 with a float located near the center in the width direction. However, in order to make it more stable, you may fix the some bridge girder fixing tool 60 also to the fence parts 21 other than a center as needed.

  FIG. 16 shows a bridge girder fixing tool 60. The bridge girder fixing tool 60 includes a claw portion 61 for hanging on the bridge girder 102 and a pressing bolt 62 that presses the fence portion 21 and fixes the fence portion 21 and the bridge girder 102. With the claw 62 sandwiching the fence 21 and the bridge girder 102, the pressing bolt 62 is tightened to press and fix the fence 21 and the bridge girder 102. However, although the specific shape of the bridge girder fixing tool 60 is shown here, the fixing method of the suspension scaffold and the bridge girder 102 is not particularly specified. If the flange of the bridge girder 102 and a part of the suspension scaffold 1 with the float can be fixed, other jigs can be used as a fixture.

According to the above erection method, in addition to the same advantages as the erection method of the first embodiment, the suspension scaffold and the bridge structure 100 are mechanically connected by the bridge girder fixing device 60. Thus, the resistance to the wind to the suspension scaffold and the vibration of the work can be further enhanced. The erection method of the second embodiment can be suitably used for inspection of a bridge structure having a flange portion on the bridge girder.
(Embodiment 3)

On the other hand, even when H steel or the like is not provided on the lower surface side of the bridge structure, when the bridge girder is constricted, a fixing structure using this can be realized. Such an example will be described below as Embodiment 3 with reference to FIG.
(Construction method of Embodiment 3)

  The erection method of the third embodiment further includes a step of connecting a bridge girder fixing tool 65 for fixing the fence 21 and the bridge structure 100 after the step of suspending the suspension scaffold. FIG. 18 shows a state where the bridge structure 100 and the suspension scaffold are fixed by the bridge girder fixing tool 65. However, FIG. 18 omits one of the bridge girders 102 at both ends of the bridge girder fixing member 65 in order to easily understand the form of the bridge girder fixing member 65.

  The bridge girder fixing tool 65 includes expansion / contraction portions 67 at both ends of the support plate 66. Further, a fence holding part 68 is provided, and the fence holding part 68 and the support plate 66 are connected by a height adjusting screw 69. First, the bridge girder fixing tool 65 is disposed between the bridge girders 102, and the length of the expansion / contraction part 67 provided on both sides is adjusted, so that the bridge girder fixing tool 65 is fixed in a state where it is laid across the bridge girder 102. Next, the bridge holding part 68 is adjusted to the height of the fence part 21 with the height adjusting screw 69, and the fence part 21 is held with the fence holding part 68, whereby the bridge structure 100 and the suspension scaffold are mechanically connected. Can be fixed to. In this step, the bridge girder fixing tool 65 is fixed to at least one location of the suspended fence scaffold 21. Preferably, the bridge structure 100 is fixed to the fence portion 21 of the suspension scaffold 1 with a float located near the center in the width direction. However, in order to make it more stable, a plurality of bridge girder fixtures 65 may be arranged as necessary and fixed to the fence portion 21 other than the center.

  As mentioned above, although the construction method of Embodiment 3 and the bridge girder fixing tool 65 used for the construction method were demonstrated, the form of the bridge girder fixing device which fixes a suspension scaffold and the bridge girder 102 is not specified above. The bridge girder fixing tool 65 described above is an example for specifically explaining the means for connecting the bridge girder 102 and the suspension scaffold. If there is at least a member for horizontally laying the bridge girder fixing member 65 between the bridge girders 102 and a member for connecting the bridge girder fixing member 65 and a part of the suspension scaffold 1 with the float, the installation method of the third embodiment is realized. be able to.

  According to the above erection method, in addition to the same advantages as those of the erection method of the first embodiment, the suspension scaffold and the bridge structure 100 are mechanically connected by the bridge girder fixing device 65, so that a stronger fixation can be achieved. As a result, the resistance to the wind to the suspension scaffold and the vibration of the work can be further enhanced. The erection method of the third embodiment can be suitably used for inspection of a bridge structure having a constriction in a bridge girder.

  The suspension scaffold part 1 with a float described above has a structure in which the float part 2 is fixed to the lower surface of the suspension scaffold part 4. However, the present invention is not limited to the structure of the suspended scaffold part with the float, and the float part may be detachable from the suspended scaffold part. In this way, when moving on the water, float the suspended scaffold with float at the float, move it to the desired position, and lift the suspended scaffold with float from the water surface toward the lower surface of the bridge structure. In this case, by lifting the float part from the suspended scaffold part, the suspended scaffold part can be made lightweight, and the load of lifting and moving can be reduced. Further, in this configuration, it is not always necessary to fix the float part to the scaffold part. For example, as a float part, a moving body such as a tug boat having a flat top surface is used, and a suspended scaffold part is provided on the upper surface of the movable body. It can also be set as the structure which raises only a suspension scaffold part toward the bottom face side of a bridge structure in a desired position. In the present invention, it is sufficient that the float part can be held so that the suspended scaffold part does not fall off when towing on the surface of the water, and the placing of the suspended scaffold part on such a float part is also referred to as the float part in the present invention. Included in fixing the suspension scaffold.

  According to the suspension scaffold with a float and the suspension scaffold construction method in the bridge structure of the present invention, it is most suitable as a scaffold for inspection of a bridge constructed on the water and its construction method. Moreover, it can be used as a scaffold for inspection of not only bridge structures over water but also overpass roads and bridge structures on land.

DESCRIPTION OF SYMBOLS 1 ... Suspension scaffold with a float 2 ... Float part 2 '... Float part 4 ... Suspension scaffold part 10 ... Float material 10' ... Float material 11 ... Float outer peripheral plate 12 ... Suspended scaffold fixing part 13 ... Towing connection part 20 ... Scaffold board 21 ... Fence part 21 '... Fence part 22a ... Suspension scaffold connection part 22a' ... Suspension scaffold connection part 22b ... Suspension scaffold connection part 22b '... Suspension scaffold connection part 23 ... First fence connection hole 24 ... Second fence connection hole 25 ... Wire connection part 26 ... First wire 26 '... Second wire 28 ... Diagonal material 29 ... Slip-proof hole 30 ... Bolt 31 ... Fence fixing fastening hole 40 ... Bolt 41 ... Bolt 42 ... Connecting plate 50 ... First power Part 50 '... Second power part 51 ... First hook 51' ... Second hook 52 ... Control device 53 ... First power side wire 53 '... Second power side wire 60 ... Bridge girder fixture 61 ... Claw part 62 ... Pressing Bolt 65 ... Bridge girder fixture 66 ... Support Plate 67 ... Expandable part 68 ... Fence holding part 69 ... Height adjusting screw 100 ... Bridge structure 101a ... First bridge side face position 101b ... Second bridge side face position 101c ... Third bridge side face position 102 ... Bridge girder 103 ... Bridge pier 104 ... Railing 200 ... boat 210 ... outboard motor 400 ... bridge inspection car 500 ... scaffolding

Claims (14)

A construction method of a suspension scaffold in a bridge structure,
Preparing a plurality of suspension scaffolds with floats with a float part fixed to the lower side of the suspension scaffold part according to the width of the bridge structure to be constructed;
Floating and moving the suspended scaffold with float to the bottom of the bridge structure to be constructed; and
Lift the suspension scaffold with float so that its longitudinal direction matches the width of the bridge structure from the water surface toward the back of the bridge, and with the float at the first bridge side surface on both sides of the bridge structure Connecting the suspension scaffold with the first wire ;
Pulling up the first wire and suspending the suspension scaffold with float on a bridge structure;
After hanging the suspended scaffold with a float on a bridge structure, fixing the suspended scaffold with a float to a part of the bridge structure with a bridge girder fixture provided in the suspended scaffold with the float;
Of suspension scaffolds in bridge structures including It is a construction method of the suspension scaffold in the bridge structure according to claim 1 , further comprising:
A method for constructing a suspended scaffold in a bridge structure, comprising: a step of suspending the suspended scaffold with a float on a bridge structure and then moving the suspended scaffold with a float in a longitudinal direction of the bridge structure. A construction method of a suspension scaffold in the bridge structure according to claim 2 ,
The step of moving the suspension scaffold with float in the longitudinal direction of the bridge structure,
Connecting the suspension scaffold with a float with a second wire to the side surfaces on both sides of the bridge structure, the second bridge side surface spaced from the first bridge side surface position in the moving direction of the suspension scaffold with a float; and
A method for constructing a suspension scaffold in a bridge structure, comprising: loosening the first wire while pulling up the second wire and moving the float-attached suspension scaffold from a first bridge side face position to a second bridge side face position. A construction method of a suspension scaffold in a bridge structure,
Preparing a plurality of suspension scaffolds with floats with a float part fixed to the lower side of the suspension scaffold part according to the width of the bridge structure to be constructed;
Floating and moving the suspended scaffold with float to the bottom of the bridge structure to be constructed; and
Lift the suspension scaffold with float so that its longitudinal direction matches the width of the bridge structure from the water surface toward the back of the bridge, and with the float at the first bridge side surface on both sides of the bridge structure Connecting the suspension scaffold with the first wire;
Pulling up the first wire and suspending the suspension scaffold with float on a bridge structure;
A step of suspending the suspended scaffold with a float on a bridge structure and then moving the suspended scaffold with a float in a longitudinal direction of the bridge structure;
Including
The step of moving the suspension scaffold with float in the longitudinal direction of the bridge structure,
Connecting the suspension scaffold with a float with a second wire to the side surfaces on both sides of the bridge structure, the second bridge side surface spaced from the first bridge side surface position in the moving direction of the suspension scaffold with a float; and
A method for constructing a suspension scaffold in a bridge structure, comprising: loosening the first wire while pulling up the second wire and moving the float-attached suspension scaffold from a first bridge side face position to a second bridge side face position. A method for constructing a suspension scaffold in a bridge structure according to claim 3 or 4, further comprising:
A method of constructing a suspension scaffold for a bridge structure, including a step of connecting a second power unit for lifting to one end of the second wire when the suspension scaffold with a float and the bridge structure are connected by the second wire. . A method for constructing a suspension scaffold in a bridge structure according to any one of claims 1 to 5, further comprising:
A method for constructing a suspension scaffold in a bridge structure including a step of connecting a first power unit for lifting to one end of the first wire when the suspension scaffold with a float and the bridge structure are connected by the first wire. . A suspension scaffold with a float to be provided on the back side of the bridge structure in a posture in which the longitudinal direction thereof matches the width of the bridge structure,
A float having buoyancy;
Provided on the upper surface of the float part;
A plate-like scaffolding plate part to which an operator can move;
A suspended scaffold part having a fence part covering the periphery of the scaffold plate part;
Wire connecting portions provided at both ends of the float part and / or the suspended scaffold part ;
A suspension scaffold with a float, comprising: a suspension scaffold connection portion for coupling to the fence portion with another suspension scaffold with a float . A suspension scaffold with a float to be provided on the back side of the bridge structure in a posture in which the longitudinal direction thereof matches the width of the bridge structure,
A float having buoyancy;
Provided on the upper surface of the float part;
A plate-like scaffolding plate part to which an operator can move;
A suspended scaffold part having a fence part covering the periphery of the scaffold plate part;
Wire connecting portions provided at both ends of the float part and / or the suspended scaffold part;
Float with hanging scaffolds comprising <br/> the bridge girder fixture for fixing the float with suspended scaffolding girder. The suspended scaffold with float according to claim 7 or 8 , further comprising:
The float part includes a float material having buoyancy and a float outer peripheral plate covering the periphery of the float material, and the float material is a suspended scaffold with a float made of synthetic foamed resin. A suspended scaffold with a float according to any one of claims 7 to 9 ,
The suspended scaffold with a float in which the float outer peripheral plate and / or the suspended scaffold part is made of aluminum. A suspended scaffold with a float according to any one of claims 7 to 10 , further comprising:
A suspended scaffold with a float, comprising a power part that pulls the wire at one end of a wire connecting the wire connecting part and the bridge structure. The float scaffold with a float according to claim 11 , further comprising:
A suspension scaffold with a float, comprising a control device for electrically controlling the power section, operable from the suspension scaffold section. The suspended scaffold with a float according to any one of claims 7 to 12, further comprising:
A suspension scaffold with a float provided with a towing connection part for towing the suspension scaffold with a float while floating on water. A suspended scaffold with a float according to any one of claims 7 to 13 ,
A suspension scaffold with a float, wherein the float portion is detachably fixed to a lower surface of the suspension scaffold portion.

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