JP2009138479A - Temporary restoration method associated with removal of bridge expansion device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a temporary restoration method associated with the removal of a bridge expansion device, which enables a removal location to be relatively easily restored at a low cost in the removal of the bridge expansion device. <P>SOLUTION: Characteristically, this temporary restoration method comprises: a step of removing pavement on a section where the expansion device to be removed is positioned, and a section around it; a step of cutting the expansion device in a pavement-removed section so as to take out the cut expansion device onto the ground; a step of installing the covering plate in a location in which the pavement and the expansion device are removed; a step of fixing a joint member to a proper location of a girder inside the bridge in the covering plate-installed location; a step of connecting the covering plate and the joint member together by means of a wire, and of tensioning the wire; and a step of laying a paving material around and on the covering plate. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a temporary restoration method associated with removal of a bridge expansion / contraction device.

  The bridge is provided with an expansion / contraction device for the purpose of absorbing expansion and contraction of the bridge constituent member due to a temperature change or the like. Such bridge expansion and contraction devices have various scales and types depending on the installed bridge. On the other hand, the bridge expansion / contraction device may be damaged or aged due to aging, and may need to be replaced with a new expansion / contraction device.

  However, if the bridge telescopic device is to be replaced, there is an inconvenience that the passage of the part must be restricted. In particular, in the case of a large-scale expansion / contraction device, since it takes a considerable number of days to replace the device, this greatly affects the passage of the vehicle. In addition, since replacing a large-scale device requires a large amount of money, it may happen that the damaged device is removed and a new device is installed at a later date (for example, the following year). First-aid measures must be taken where the device is removed.

  The present invention has been developed in view of such a situation, and when removing the bridge expansion / contraction device, the removal of the bridge expansion / contraction device can be restored relatively easily and at low cost. The purpose is to provide a temporary restoration method.

  The temporary restoration method associated with the removal of the bridge expansion / contraction device according to claim 1 includes a step of removing the pavement of the portion where the expansion device to be removed and the surrounding portion are removed, and the expansion device of the portion where the pavement is removed. A step of cutting and taking out to the ground, a step of installing a lining plate at a place where the pavement and the expansion / contraction device have been removed, and a step of fixing a joint member at an appropriate position of a girder inside the bridge where the lining plate is installed; And a step of connecting the lining plate and the joint member with a wire and tensioning the wire, and a step of laying a paving material around and on the lining plate. Is.

  The temporary restoration method associated with the removal of the bridge expansion and contraction device according to claim 2 of the present application is the method according to claim 1, wherein a gap is provided at one end of the lining plate in order to absorb the expansion and contraction of the bridge constituting member. It is characterized by being.

  ADVANTAGE OF THE INVENTION According to this invention, temporary restoration accompanying removal of a bridge expansion-contraction apparatus can be implemented easily and at low cost for a comparatively short time. In the method of the present invention, since the lining plate is firmly fixed to the girder inside the bridge, it can withstand a predetermined traffic load. Further, by providing a gap at one end of the lining plate, it is possible to cope with the expansion and contraction of the bridge constituent member as soon as possible.

  Next, with reference to the drawings, a temporary restoration method according to a preferred embodiment of the present invention will be described in detail. FIG. 1 is a perspective view schematically showing the external appearance of a telescopic device in which a temporary restoration method according to a preferred embodiment of the present invention is implemented, and FIG. 2 is a series of steps showing the procedure of the temporary restoration method of the present invention. FIG.

  First, the pavement is removed from the portion where the telescopic device to be removed is located and the surrounding portion (see FIG. 2A). Specifically, a cutter is used to make a cut in the pavement and remove that portion of the pavement. As shown in FIG. 1, the telescopic device extends in a direction orthogonal to the bridge axis. However, since it takes a lot of work time to remove the entire telescopic device at a time, the entire telescopic device is removed at a time. Instead, it is preferable to carry out the removal work for each predetermined width (see the broken line in FIG. 1).

  Subsequently, the expansion device of the part from which the pavement is removed is cut, and the cut expansion device is taken out and removed on the ground. When removing a telescopic device, when a steel mold member located inside the bridge (pavement lower part) cushions, the steel mold is cut.

  Next, a lining board is temporarily placed on the place where the pavement and the expansion / contraction device have been removed (see FIG. 2B). Here, the lining plate includes a lining girder formed by assembling a steel plate in addition to a single steel plate. Prior to the temporary placement of the lining plate, it is desirable to clean the place where the lining plate is installed and adjust the unevenness. In addition, the lining board is designed so that it can endure the traffic load of the installation location.

  Next, the joint member is fixed with a bolt or the like at an appropriate position (for example, a box girder lower flange or the like) inside the bridge where the lining plate is to be installed (see FIG. 3C). On the other hand, a joint member is also fixed to the lower surface of the lining plate in advance. In addition, you may use a normal joint member.

  Subsequently, the joint member of the lining plate and the joint member installed at an appropriate position of the girder are connected by a wire (see FIG. 3D). At that time, it is preferable to use a lever block or the like to tension the wire and fix the tensioned wire with a wire clip.

  Lastly, the pavement is rubbed around the lining plate, and a pavement material is laid on the lining plate to complete the construction relating to the location (see FIG. 3 (e)).

  The temporary restoration work is performed by repeatedly performing the above steps along the expansion device with an appropriate width.

  In addition, since it may take a long time from the temporary restoration work to the actual restoration work (work to install a new telescopic device), as shown in FIG. It is preferable to provide a gap at one end so that the expansion and contraction of the bridge component can be absorbed.

  The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the invention described in the claims, and these are also included in the scope of the present invention. Needless to say, it is something.

  For example, in the above-described embodiment, the lining plate is formed by a single plate or girder, but two lining plates may be used depending on the traffic load.

It is the perspective view which showed roughly the external appearance of the expansion-contraction apparatus by which the temporary restoration construction method which concerns on preferable embodiment of this invention is implemented. It is a series of figures which showed the procedure of the temporary restoration construction method which concerns on preferable embodiment of this invention. It is an enlarged view of the part 3 of FIG.2 (c). It is the schematic diagram which showed the state which provided the clearance gap in one end of a covering board so that expansion / contraction can be absorbed.

Claims (2)

It is a temporary restoration method associated with the removal of the bridge telescopic device,
Removing the pavement of the portion where the telescopic device to be removed is located and the surrounding portion,
Cutting the telescopic device of the part where the pavement is removed and taking it out to the ground;
Installing a lining plate at the place where the pavement and expansion / contraction device have been removed
Fixing the joint member at an appropriate position of the girder inside the bridge where the lining plate is installed; and
Connecting the lining plate and the joint member with a wire, and tensioning the wire;
Laying paving material around the lining plate and on the lining plate;
A construction method characterized by containing. The construction method according to claim 1, wherein a gap is provided at one end of the lining plate in order to absorb expansion and contraction of the bridge constituting member.

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