JPS633082B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention aims to protect bridges in snowy regions, particularly bridges on mountain roads in heavy snowy regions, from snow damage. Most of the bridges on mountain roads are left abandoned during the winter due to snowfall and blizzards, with no snow plows available.As a result, the snow in the valleys and the snow on the bridges continue to form a huge amount of snow, and this build-up Snow can bury the windward end of a long bridge, or the entire bridge if it is short.

By the way, this accumulated snow increases its settling force during the snow melting season, and due to the stickiness of the snow, there is a resultant force of not only the snow on the bridge but also the settling force of the surrounding snow and snow pressure on the slope. The heavy weight is not only the snow load on the bridge, but also several tens to hundreds of times the surrounding snow depth depending on the topography, and the load due to this settling force is an uneven load depending on the topography, wind direction, etc. This often results in damage to bridges, which is a major problem in road management.

As a result of repeated tests and research this winter in order to solve the current situation as described above, the present invention has been developed by erecting lower protection fences and dividing fences on both sides of the bridge, thereby reducing the settling force of the snow on the bridge and the surrounding snow. It was found that the bridge is protected safely because only the snow load on the bridge is applied to the bridge.

To describe the present invention in detail with reference to the illustrated embodiment, a lower protection fence 5 is installed on the side of the bridge girder 3 at the windward end 2 of a bridge 1 built across a valley to protect the side surface of the bridge girder 3. However, this lower protective fence 5
First, columns 6, 6'... at the height of the upper edge of the bridge girder 3 are erected on the slope 4, and in the upper part between the columns 6, 6'..., transverse rods 7, 7' and wires 8, 8'... A wire mesh 9, 9' is stretched across the bridge, and these wire meshes 9, 9' prevent snow from adhering to the bridge girder 3 and protect the bridge 1 from side snow pressure.

Next, the dividing fences 10, 10' are removably attached to the posts 6, 6'... of the lower protective fence 5.
1, 11'... and the horizontal fence rods 12, 12', which are removably installed horizontally between the fence posts 11, 11'... and the horizontal fence rods 12, 1.
2'... consists of short fence-like fence pieces 13, 13', which are detachable. As a means for detachably attaching the fence posts 11, 11'... to the posts 6, 6'..., the posts 6, 6'...
A mounting bracket 14 is provided on the outside of the upper end of the fence post 11,
The base end of 11'... can be inserted and removed freely, and the fence posts 11, 1
1'... are fixed to the parapet 15 of the bridge 1 with a wire 17 via a square member 16. Fence post 11, 11'
The height of ... should be greater than the maximum snowfall height on Bridge 1. The fence pieces 13, 13'... are fixed to the horizontal fence posts 12, 12'... by wires 18, but the fence pieces 13, 13'... are spaced apart so that the transmittance is about 40%. Set it up. It is preferable that the height of these fence pieces 13, 13'... is higher than the expected maximum snowfall height on the bridge 1 from the lower end of the parapet 15 of the bridge 1, but normally during the snow melting season, compacted snow As the snow ages, the height of the snow falls, and the settling power increases from that time on, so it is good even if it is slightly lower than the height of the snow during the coldest season.

If there is snow on only one side of the bridge due to various conditions such as topography and main wind direction in winter, it is only necessary to install a lower protective fence and dividing fence on one side of the bridge. In areas where the entire bridge 1 is buried, a lower protective fence and dividing fence will be installed along almost the entire length.

The present invention is embodied as described above, and to explain its operation and effect, the snow on the bridge 1 and the surrounding snow tend to settle together, but the snow on the bridge and the surrounding snow are separated. Fence 10,10'
As shown in Figure 2, the snow on the bridge 1 is divided into snow A and snow on the left and right sides B and B', and the lower protective fence 5 causes the sides of the bridge 1 to be affected by lateral snow pressure. The load on the bridge 1 is only the snow load on the bridge 1, and in addition, it is only the vertical load, so the bridge 1 can be managed safely without being damaged.

The lower protective fence 5 uses wire mesh 9, 9', that is, has transmittance, and the divided fences 10, 10'
The reason why the fence bodies 11, 11', .

The dividing fences 10, 10' can be easily disassembled in seasons other than winter, and the natural beauty will not be spoiled.

[Brief explanation of the drawing]

FIG. 1 is an explanatory side view of the apparatus of the present invention, FIG. 2 is a front vertical sectional view thereof, and FIG. 3 is a partially enlarged view of the main parts. 1 is the bridge, 3 is the bridge girder, 4 is the lower protection fence, 6,
6'... are posts, 9, 9' are wire meshes, 10, 10' are dividing fences, 11, 11'... are fence posts, 13, 13'... are fence bodies.

Claims (1)

[Claims] 1. Erect the pillars of the lower protection fence to protect the sides of the bridge on the slope of the ground on one or both sides of the bridge,
A device for dividing the settling force of snow on a bridge is provided on the pillars of this protective fence with a dividing fence having a height that separates the snow on the bridge from the snow on one side or both sides of the bridge.