JPH0336962B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a floating bridge that can be loaded onto a transport vehicle or the like and moved to any location, and that is erected in an emergency over a river, etc. narrowing the width of time,
The present invention also relates to a floating bridge suitable for widening the bridge width during bridge construction.

[Background of the invention]

A conventional floating bridge will be explained with reference to FIGS. 1 and 2. Figure 1 is a cross-sectional view in the installed state, Figure 2
The figure is a cross-sectional view in a conveyed state. In FIG. 1, the floating bridge consists of two main bridge bodies 2 connected by hinges 1 and auxiliary floating bodies 4 connected to both sides by hinges 3. A vehicle 5 passes on the upper surface and crosses the river. 6 is a water surface, and flowing water flows below the main bridge body 2 and the auxiliary floating body 4 in the direction of arrow V. Since the load of the vehicle 5 needs to be supported by the increase in displacement (buoyancy) due to the subsidence of the main bridge body 2 and the auxiliary floating body 4, the bridge width B
The height (thickness) D of the main bridge body 2 and the auxiliary floating body 4 must be considerably large. In addition, the main bridge body 2,
The lower surface of the auxiliary floating body 4 is inclined at both ends A of the auxiliary floating body 4 in order to reduce water resistance and facilitate the passage of driftwood, etc. The lower surface of the main bridge body 2 forms a continuous plane with a horizontal surface, and the upper surface of the main bridge body 2 secures the roadbed necessary for the passage of vehicles 5, and in order to prevent waves from covering the upper surface of these bridges, both ends of the auxiliary floating body 2 are It has an elegantly constructed structure. Next, as shown in FIG. 2, when transporting the floating bridge, the main bridge body 2 and the auxiliary floating body 4 are folded and loaded onto a transport vehicle 7, and the vehicle travels on the ground 8. However, as mentioned above, the height (thickness) D of the main bridge body 2 and the auxiliary floating body 4 is high (thick).
Therefore, the width B′ when folded becomes very wide.
The drawback was that it was difficult to drive on the road.

[Purpose of the invention]

In view of the above points, an object of the present invention is to provide a floating bridge that can widen the effective width of the bridge in an erected state, reduce water resistance on the underside of the bridge, and reduce the width during transportation. This is what I did.

[Summary of the invention]

The present invention makes the height (thickness) of the auxiliary floating body lower (thinner) than that of the main bridge body to reduce the width during transportation, and also makes the lower surfaces of the main bridge body and the auxiliary floating body flush with each other during erection. By doing so, the resistance of flowing water is reduced, and the height (thickness) of the auxiliary floating body is
This feature is characterized in that a rotary wave suppressing member prevents the end portion from being covered with waves due to the lower (thinner) end portion.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to FIGS. 3 and 4. FIG. 3 is a cross-sectional view in an erected state, and FIG. 4 is a cross-sectional view in a transported state. In the figure, the floating bridge has two main bridge bodies 9 whose submerged parts are watertight and which also serve as floating bodies, connected by a central hinge 1, and hinges 3 and connecting pins 1 on both sides.
It is constructed by connecting an auxiliary floating body 11 via 0. A wave suppressing plate 13 is connected to the upper side of the auxiliary floating body 11 through a connecting pin 12, and supported by a support rod 14. The height (thickness) D' of the auxiliary floating body 11 is made lower (thinner) than the height (thickness) D of the main bridge body 9 in order to reduce the vehicle width when folded. Also, during the bridge construction, the lower surface of the auxiliary floating body 11 is made to be on the same plane as the lower surface of the main bridge body 9,
In addition, the lower surfaces of both ends A are sloped to reduce resistance to running water and to facilitate passage of the lower surface of driftwood and the like. The wave suppression plate 13 has a sufficient height D'' to match the slope of the lower side A of the auxiliary floating body 11, to allow running water, driftwood, etc. to easily flow to the lower surface of the floating bridge, and to prevent waves from overlapping the floating bridge. Let it stand.
Further, on the upper surface of the main bridge body 9, a track bed plate 15 which also serves as a compression member against the bending moment of the bridge is arranged, and a lower chord member 16 which serves as a tension member is provided at the lower part, and a web member 17 is provided between the two. Combine with . In the transportation state, the support rods 14 are moved or removed, the wave suppressing plate 13 is folded, and the main bridge body 9 and the auxiliary floating body 11 are folded and loaded onto the carrier vehicle 7.

According to such a configuration, when the wave suppression plate 13 is folded, the height (thickness) of the auxiliary floating body 11 is lower (thinner) than the height (thickness) D of the main bridge body 9, and the height (thickness) of the auxiliary floating body 11 is lower (thinner) than the height (thickness) D of the main bridge body 9. Since the height D'' required for By lowering (thinner) the height (thickness) D' of the floating body 11, the dimensions required to tilt both ends A become smaller, so when the entire bridge is folded and loaded onto the transport vehicle 7, Since the width of the auxiliary floating body 11 in the bridge state is restricted by the limited height H, the effective width C against buoyancy can be made larger than that of the conventional one, increasing the effective width of the entire floating bridge. There is an effect that can be done.

Next, other embodiments of the present invention are shown in FIGS. 5 and 6.
This will be explained using figures. FIG. 5 is a cross-sectional view of the erected state, and FIG. 6 is a cross-sectional view of the transported state. In the figure, the difference between this embodiment and the previous embodiment is that the auxiliary floating body 11' has a sloped portion A on both sides, and the height H is approximately the same as the height of the main bridge body 9 in the folded state. The point is that a wave suppressing floating body 13' is provided.

According to such a configuration, the width in the transportation state is
The auxiliary floating body
Since the height (thickness) D' of 1' can be increased (thickness), the buoyancy of the entire floating bridge can be increased, and heavier vehicles etc. can pass through it than in the previous embodiment.

In addition, when the edge hits a wave, a restoring force is generated that reduces the torsional force acting on the bridge, which reduces the torsional load on the bridge and reduces the slope of the roadbed due to torsion, making it easier for vehicles to pass. It can be easily done.

〔Effect of the invention〕

As explained above, according to the present invention, the effective width of the bridge can be increased in the constructed state, the water resistance on the underside of the bridge can be reduced, and the width can be reduced during transportation.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of a conventional floating bridge in an erected state, FIG. 2 is a cross-sectional view of the floating bridge of FIG. 1 in a transported state, and FIG. 3 is a cross-sectional view of an embodiment of a floating bridge according to the present invention in an erected state. 4 is a cross-sectional view of the floating bridge shown in FIG. 3 in a transported state, FIG. 5 is a cross-sectional view of another embodiment of the floating bridge according to the present invention in an erected state, and FIG. 6 is a cross-sectional view of the floating bridge shown in FIG. FIG. 3 is a cross-sectional view in a transported state. 1, 3... Hinge, 9... Main bridge body, 11... Auxiliary floating body, 12... Connection pin, 13... Wave suppressing plate.

Claims (1)

[Claims] 1. Consisting of a foldable main bridge body and an auxiliary floating body rotatably provided on the side of the main bridge body, the main bridge body and the auxiliary floating body are folded and transported, In a floating bridge that is expanded and bridged, the height of the auxiliary floating body when bridged is smaller than that of the main bridge body, and the lower surfaces of the auxiliary floating body and the main bridge body are flush with each other in the expanded state. 1. A floating bridge, characterized in that an auxiliary floating body and a main bridge body are connected to each other, and a foldable wave suppressing member is provided at an end of the auxiliary floating body. 2. In claim 1, the lower surface side of the end of the auxiliary floating body when deployed is inclined,
A floating bridge characterized in that the wave suppressing member is configured to correspond to the slope portion.