JP6779740B2 - Elevated structure inspection method - Google Patents

Description

The present invention relates to an elevated structure inspection device that can be directly inspected by a person, an installation method of the elevated structure inspection device, and an inspection method using the elevated structure inspection device.

There are various types of elevated structures such as bridges and roads. For example, in the case of bridges, inspection is obligatory once every five years.
When working at heights for inspection, workers were inspecting by building scaffolding or hanging gondola.
However, it took time and effort to build a foothold, and there was a danger of being hit by the wind when using a gondola.

Patent Document 1 describes a first support trolley arranged on a bridge and movable along the bridge, and a second support trolley arranged on the bridge and movable together with the first support trolley along the bridge. , Attached to a support base provided on the first support carriage and extending downward on one side of the bridge, and attached to a support base provided on the second support carriage. A second suspension support that extends downward on the other side of the bridge, and a nested structure that is stretchable in the longitudinal direction and is attached to the lower end of the first suspension support. A first beam body that extends horizontally toward the lower side and a first beam body that is stretchable in the longitudinal direction due to a nested structure and are attached to the lower end of the second suspension support and horizontally toward the lower side of the bridge. For inspection, the second beam body that extends and is connected to the tip of the first beam body at the tip, and guide rails provided on the upper part of the first beam body and the upper part of the second beam body can be moved. A bridge inspection device characterized by having an apparatus is described.

In the bridge inspection device described in Patent Document 1, the above problem can be solved by inspecting by an inspection machine, but the accuracy is inferior to that of a worker performing a tapping sound inspection or visual confirmation.

Japanese Unexamined Patent Publication No. 2016-41861

The present invention provides an elevated structure inspection device, an installation method thereof, and an elevated structure inspection method, which can be inspected while ensuring the safety of inspection workers and can easily install the inspection device in order to solve the conventional problems. provide.

In the elevated structure inspection device of the present invention, the method of installing the elevated structure inspection device for inspecting the lower surface of an elevated structure such as a bridge is as follows.
A first support means and a second support means, which are installed in the vicinity of each of the both side edges of the elevated structure and have a hanging portion extending below the lower surface of the elevated structure, respectively.
A scaffold forming member which is attached to the lower end side of the hanging portion in the first supporting means and can expand and contract between the extension position and the retracted position along a direction intersecting the axis of the hanging portion, and a scaffold. A scaffolding means including a telescopic means for expanding and contracting the forming member between an extension position and a retracted position, and a scaffolding means.
A rotating means provided in the first supporting means and rotating the scaffolding means around the axis of the hanging portion of the first supporting means.
A connecting means for detachably connecting the lower end side of the hanging portion in the second supporting means and the tip end side of the scaffolding forming member in an extended state.
It is an elevated structure inspection device characterized by being provided with.

The method for installing an elevated structure of the present invention is an elevated structure inspection device for inspecting the lower surface of an elevated structure such as a bridge.
A first support means and a second support means, which are installed in the vicinity of each of the both side edges of the elevated structure and have a hanging portion extending below the lower surface of the elevated structure, respectively.
A scaffold forming member which is attached to the lower end side of the hanging portion in the first supporting means and can expand and contract between the extension position and the retracted position along a direction intersecting the axis of the hanging portion, and a scaffold. A scaffolding means including a telescopic means for expanding and contracting the forming member between an extension position and a retracted position, and a scaffolding means.
A rotating means provided in the first supporting means and rotating the scaffolding means around the axis of the hanging portion of the first supporting means is used.
A step of installing the second support means in the vicinity of one side edge of the elevated structure so that the lower end of the hanging portion is located below the lower surface of the elevated structure.
The step of attaching the scaffolding means to the lower end side of the hanging portion of the first supporting means,
A step of locating the scaffolding means attached to the first support means below the lower surface of the elevated structure.
The step of installing the first support means in the vicinity of the other side edge of the elevated structure,
A step of rotating the scaffolding means by the rotating means and adjusting the expansion / contraction direction of the scaffolding forming member of the scaffolding means so as to be in the direction toward the hanging portion of the second supporting means.
The step of extending the scaffolding forming member of the scaffolding means by the telescopic means until it reaches the lower end side of the hanging portion of the second supporting means, and the tip end side of the scaffolding forming member of the second supporting means. The process of detachably connecting to the lower end side of the hanging part of
It is a method of installing an elevated structure inspection device, which is characterized by including.

The elevated structure inspection method of the present invention is an elevated structure inspection method characterized in that the lower surface of the elevated structure is inspected by using the elevated structure inspection device.

In the elevated structure inspection device of the present invention, a first support means and a second support means are provided in the vicinity of both side edges of the elevated structure, and scaffolding is provided on the lower end side of the first support means and the second support means. Since the means can be supported, the scaffolding means can be firmly fixed.
Since the scaffolding means can be firmly fixed, the worker can safely and directly inspect the elevated structure.
In addition, since the scaffolding means can be expanded and contracted, the length of the scaffolding means can be adjusted according to the width of the elevated structure.

In the method of installing the elevated structure inspection device of the present invention, the passage is restricted in order to park the work vehicle by providing the first support means and the second support means in the vicinity of both side edges of the elevated structure. It doesn't have to be.
In addition, since the scaffolding means can be expanded and contracted, it can be adjusted according to the width of the elevated structure.

By using the elevated structure inspection method of the present invention, it is possible for a worker to safely and directly inspect the elevated structure.

It is a figure which shows the state that after the 2nd support means was installed near one side edge of an elevated structure, the 1st support means was suspended by a crane for installing near the other side edge of an elevated structure. It is a figure which shows the appearance which the 1st support means was installed near the side edge of an elevated structure. It is a figure which shows the state that the scaffolding means was rotated after the first support means was installed in an elevated structure. It is a figure which shows the state which extended the scaffolding means, reached the lower end side of the hanging part of the 2nd support means, and connected to the 2nd support means. It is the figure which moved the scaffolding means in the axial direction of the suspension part, and brought it close to the lower surface of an elevated structure.

The present invention will be described in detail below, but the present invention is not limited to the description of the present specification, and the prior art may be appropriately used.

The elevated structure inspection device of the present invention will be described with reference to FIG.
The elevated structure (B) according to the present invention refers to, for example, a bridge such as a suspension bridge or a truss bridge, an expressway or an elevated railway, and the type of the elevated structure is not particularly limited.
In FIGS. 1 to 5, the elevated structure (B) is represented by a cross-sectional view in the width direction and the pier is represented by a virtual line, but the structure of the elevated structure of the present invention is not limited to this.

The first support means (1) is a fixing portion (1a) for fixing to the elevated structure (B), a hanging portion (1b), and a connecting portion for connecting the fixing portion (1a) and the hanging portion (1b). (1c) and a mounting portion (1d) for mounting the scaffolding means (3) are provided.
The first support means (1) further includes a fixing means for fixing the elevated structure (B) to the fixing portion (1a) and a mounting means for attaching the scaffolding means to the mounting portion (1d).
The first support means (1) is installed near the side edge of an elevated structure such as a roadside band or a gutter, and is fixed by the fixing means.
The scaffolding means (3) is attached to the lower end side of the first support means (1) by the attachment portion (1d), and bolts, pins, or the like are used as the attachment portion (1d).
The first support means (1) may be provided with a telescopic means (4) in the hanging portion (1b).
A hydraulic cylinder may be used as the expansion / contraction means (4), and expansion / contraction may be performed at a plurality of locations.
By installing the first support means (1), the scaffolding means (3) can be lowered at a position lower than the lower surface (U) of the elevated structure (B).
The first supporting means (1) further includes a rotating means (6) for rotating the scaffolding means (3) around the axis of the hanging portion (1b) of the first supporting means (1). ..

The scaffolding means (3) includes a scaffolding forming member that can expand and contract between an extension position and a retracting position along a direction (for example, 90 degrees) that intersects the axis of the hanging portion (1b), and a scaffolding forming member. It includes an expansion / contraction means (7) that expands / contracts between an extension position and a retracted position. The scaffolding means (3) has an attachment portion (30) for the first support means and an attachment portion (31) for the second support means.
The scaffolding forming member is composed of a plurality of plate-shaped bodies (3a), and the plate-shaped bodies (3a) may overlap at the time of reduction.
The scaffolding forming member is preferably made of a lightweight and high-strength material, and aluminum, carbon graphite, or the like can be used.
The scaffolding forming member is provided with the telescopic means (7) and is configured to be stretchable according to the width of the elevated structure (B).
As the expansion / contraction means (7), a method as described in Japanese Patent Application No. 2014-117087 filed by the present applicant may be used, or may be composed of a plurality of rollers and wires.
The scaffolding means (3) may include a weight (8) for reducing the moment acting on the scaffolding forming member in the extended state, centering on the attachment portion (30) with respect to the hanging portion (1b).
The scaffolding means (3) may include a generator that supplies electric power to drive the rotating means (6) and the telescopic means (7).
This generator can also serve as the weight (8).
It is preferable that the scaffolding means (3) is provided with a stretchable handrail from the viewpoint of ensuring the safety of workers.
The handrail may be expanded or contracted using a rope, a wire or the like and a pulley, or a plurality of nested tubular members may be extended.

The second supporting means (2) is a fixing means (2a) for installing near the side edge of an elevated structure such as a roadside band or a gutter, a hanging portion (2b), a fixing means (2a) and a hanging portion. A connecting portion (2c) for connecting (2b) is provided. The attachment portion (2d) at the lower end of the suspension portion (2b) may be provided with a connecting means for fixing the scaffolding means (3). Bolts, pins, electromagnets, and the like may be provided as the connecting means.
Further, the second supporting means (2) may be provided with the expanding / contracting means (5), and may be fixed in the retracted position and then extended in the vertical direction, for example.
For example, a hydraulic cylinder may be used as the telescopic means (5).
The extended scaffolding means (3) is connected to and fixed to the second supporting means (2) by the connecting means.

The first support means (1) and the second support means (2) may further include a traveling means for moving along the longitudinal direction of the elevated structure (B), and the traveling means may include a roller. It may be used, or the rail may be laid on an elevated structure and moved on the rail.
By providing the traveling means, it is possible to inspect the lower surface (U) of the elevated structure (B) while moving, which is efficient.

The traveling means may be driven by, for example, electricity supplied from a generator, or may be operated by remote control.
The traveling means may be provided with a control device or may be operated remotely in order to make the moving speed of the first supporting means (1) and the moving speed of the second supporting means (2) the same.

The elevated structure inspection device of the present invention may include an elevating means for the worker (P) to reciprocate between the scaffolding means (3) and the upper surface of the elevated structure (B).
For example, a ladder can be used as the lifting means.

Next, the installation method of the elevated structure inspection device will be described with reference to the drawings.
As shown in FIG. 1, first, the lower end of the hanging portion of the second supporting means (2) to which the scaffolding means (3) is not attached is located below the lower surface (U) of the elevated structure (B). As described above, it is installed and fixed near one side edge of the elevated structure.
The scaffolding means (3) is oriented so that the expansion and contraction direction of the scaffolding forming member is parallel to the longitudinal direction of the elevated structure (B), and then the attachment portion (30) of the scaffolding means (3) is attached to the first support means. It is attached to the attachment portion (1d) on the lower end side of the hanging portion (1b) of (1).
Next, as shown in FIG. 2, the first supporting means (1) is installed by the crane (C) near the side edge opposite to the installation location of the second supporting means (2). At this time, the virtual line connecting the first supporting means (1) and the second supporting means (2) is installed so as to be perpendicular to the longitudinal direction of the elevated structure (B), and then the first supporting means (1). ) Is fixed near the side edge.
The scaffolding means (3) attached to the first support means (1) by this fixing is arranged below the lower surface (U) of the elevated structure (B).

As shown in FIG. 3, after installing the first support means (1), the scaffolding means (3) is rotated by the rotating means (6), and the expansion / contraction direction of the scaffolding forming member of the scaffolding means (3) is changed. , Adjust so that the direction is toward the hanging portion (2b) of the second support means (2).
After rotating the scaffolding means (3), for example, the scaffolding forming member of the scaffolding means (3) is supported by the second support by using the expansion / contraction means described in Japanese Patent Application No. 2014-117087 or a plurality of rollers and wires. It is extended until it reaches the lower end side of the hanging portion (2b) of the means (2).

As shown in FIG. 4, after the scaffolding forming member is extended to the lower end of the hanging portion (2b) of the second supporting means (2), the attachment portion (31) on the tip end side of the scaffolding forming member is attached to the second. Installation is completed by detachably connecting to the attachment portion (2d) at the lower end of the suspension portion (2b) of the support means (2).
Examples of the connecting means include bolts, pins, electromagnets, etc., which may be connected by remote control.

After installing the elevated structure inspection device, the axial lengths of the hanging portions of the first supporting means (1) and the second supporting means (2) are changed by the telescopic means (4, 5). The work may be performed by adjusting the distance between the lower surface (U) of the elevated structure (B) and the scaffolding means (3).
The adjustment method may be, for example, a structure in which the suspended portion is expanded and contracted in the vertical direction by using a hydraulic cylinder as the expansion and contraction means (4, 5), but the adjustment method is not limited to this.

As shown in FIG. 5, after adjusting the position of the scaffolding means (3), the worker (P) visually inspects, taps, and the like.
In this case, the worker (P) moves to the scaffolding forming member by a ladder or the like.

The lower surface (U) of the elevated structure (B) is inspected by installing a lifting means such as a jack on the scaffolding means (3) and placing a worker (P) on the lifting means without moving the scaffolding means in the axial direction. You may.

In the above-mentioned installation method of the elevated structure inspection device, the second support means (2) is installed and then the first support means (1) is installed, but the first support means (C) is used. The support means (1) and the second support means (2) may be installed at the same time.
The first support means (1) may be installed and then the second support means (2) may be installed.

By using the elevated structure inspection device of the present invention, for example, a stable scaffold can be provided even in a situation where a mountain wind is blowing, and the worker can safely perform the inspection work.
Further, by using the method for installing the elevated structure inspection device of the present invention, the elevated structure inspection device can be installed in a short time.

1 First support means 1a Fixing part 1b Hanging part 1c Connecting part 1d Mounting part 2 Second supporting means 2a Fixing part 2b Hanging part 2c Connecting part 2d Mounting part at the lower end 3 Scaffolding means 3a Plate-like body 4 Telescopic Means 5 Telescopic means 6 Rotating means 7 Telescopic means 8 Weight 30 Mounting part 31 Mounting part B Elevated structure C Crane P Worker U Underside of elevated structure

Claims (6)

This is an elevated structure inspection method that inspects the underside of elevated structures such as bridges.
A first support means and a second support means, which are installed in the vicinity of each of the both side edges of the elevated structure and have a hanging portion extending below the lower surface of the elevated structure, respectively.
A scaffold forming member attached to the lower end side of the hanging portion of the first supporting means and capable of expanding and contracting between an extension position and a retracted position along a direction intersecting the axis of the hanging portion, and a scaffold. A scaffolding means including a telescopic means for expanding and contracting the forming member between an extension position and a retractable position, and a stretchable handrail.
A rotating means provided in the first supporting means and rotating the scaffolding means around the axis of the hanging portion of the first supporting means.
A connecting means made of bolts or pins for detachably connecting the lower end side of the suspended portion in the second supporting means and the tip end side of the scaffolding forming member in an extended state is provided.
The scaffolding means is a method for inspecting an elevated structure, which comprises inspecting the lower surface of the elevated structure by using an elevated structure inspection device having a strength that allows a person to ride on it. The scaffolding forming member of the scaffolding means includes a plurality of plate-like bodies whose surfaces are laminated so as to intersect the axis of the hanging portion, and each plate-like body is relative to each other along the plane direction. The method for inspecting an elevated structure according to claim 1, wherein the structure is slidable. The method for inspecting an elevated structure according to claim 1 or 2, wherein the scaffolding means includes a weight for reducing a moment acting on the scaffolding forming member in an extended state, centering on a mounting portion with respect to the suspended portion. The method for inspecting an elevated structure according to any one of claims 1-3, wherein the first and second support means can change the axial length of the suspended portion. The method for inspecting an elevated structure according to any one of claims 1-4, wherein the first and second supporting means further include traveling means for moving along the longitudinal direction of the elevated structure. The method for inspecting an elevated structure according to any one of claims 1-5, which is used for inspecting a bridge having a width of 20 m or more.

Images