JP3172245U - Avalanche prevention fence - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stabilize an anchor that locks a main rope cable of a suspension type avalanche prevention fence without moving even if an avalanche load is applied to an avalanche prevention fence and necessary for an avalanche prevention fence per unit Provide avalanche prevention fences with fewer anchors. SOLUTION: In an avalanche prevention fence 10 in which a plurality of avalanche prevention fences 10 installed on an inclined slope are connected to an anchor 3 by a main rope cable 4, two main rope cables 4 are lowered from one anchor 3 to the lower end. The two main rope cables 4 were hung in a V shape so that the sides were separated, and the lower ends of the two main rope cables 4 were connected to the inside of each adjacent avalanche prevention fence 10. [Selection] Figure 2

Description

  The present invention relates to an avalanche prevention fence that reduces the number of anchors that are placed when there is little snow on the slope of an anchor that locks a main rope cable of a suspended avalanche prevention fence.

  In snowfall areas, avalanche prevention fences are installed to prevent avalanches from occurring on slopes that slope above the road during snowfall in winter.

  As the hanging type avalanche prevention fence, as shown in Japanese Utility Model Publication No. 48-7461, the four sides of the avalanche prevention fence pillars with the horizontal sides attached to the pillars at appropriate intervals are set upward. The rising plate is fixed upward, and a bar of an appropriate length is fixed to the back of the column at a position slightly above the plate, and a wire locking bracket is attached to the vertical position of the column. One is known in which one end is locked to an anchor provided at an upper position of an inclined surface where an avalanche prevention fence is desired and the other end is locked to a small hole of a locking bracket of a support column.

  According to this device, since the tray is provided at the lower end of the support column, when the snow is accumulated on the upper inclined surface of the arranged fence and a load is applied to the fence from above, the plate is stabilized while sliding slightly on the inclined surface. It is said that.

  Moreover, as a similar suspended rock fall prevention fence, as shown in Japanese Patent Publication No. 4-17245, a fence body is constructed by stretching a wire mesh on a fence frame, and this fence body is almost perpendicular to the slope of the cliff. The support wire rope is led out from the upper and lower parts of the fence body, the suspension wire rope is lowered from the upper part of the inclined surface, and the support wire rope is connected to the suspension wire rope to fence. Those that support the body are known.

  According to the present invention, the impact of falling rocks can be mitigated by utilizing the elastic elongation of the support wire rope and the suspension wire rope, so that the durability can be improved, and the fence body is simply supported by the support wire rope and The construction is supported by the suspension wire rope, so the construction is simple, it is advantageous in terms of both work and economy, and it is easy to dispose of falling rocks and earth and sand, as well as easy removal and relocation as needed. It can be done.

Japanese Utility Model Publication No. 48-7461 Japanese Patent Publication No. 4-17245

  In areas with a lot of snow, normally, as shown in the above Japanese Patent Publication No. 4-17245, a plurality of wire ropes and a number of anchors corresponding to the number of wire ropes are placed on one avalanche prevention fence. is doing.

  Even if there is little snow (about 1m) but steep slopes, there is still a risk of avalanches. Therefore, it is conceivable to install a fence with a relatively low fence height, but the load on the fence is small, and the number of anchors to be placed becomes excessive.

  FIG. 5 shows an avalanche prevention fence 20 having a relatively low fence height, and a single avalanche prevention fence 20 is supported by two anchors 21, two main rope cables 22 and a support rope 23, respectively. It is what you are doing. Although it is stable even when an unbalanced load is applied to the avalanche prevention fence 20, two anchors 21 are required for one avalanche prevention fence 20.

  FIG. 6 shows an avalanche prevention fence 30 having a relatively low fence height, and one avalanche prevention fence 30 is arranged in one anchor 31, one main rope cable 32 and a V-shape. The two supporting ropes 33 are supported. Although only one anchor 31 is required for one avalanche prevention fence 30, the avalanche prevention fence 30 moves so as to rotate when an unbalanced load is applied and is not stable.

  Therefore, the present invention provides an avalanche prevention fence that is stable without moving even if an unbalanced load is applied to the avalanche prevention fence and that reduces the number of anchors required for an avalanche prevention fence per unit. For the purpose.

  The avalanche prevention fence according to the first aspect of the present invention is the avalanche prevention fence 10 in which a plurality of avalanche prevention fences 10 installed on an inclined slope 1 are connected to the anchor 3 by the main cable 4 to one anchor 3 to 2. The main rope cables 4 are hung in a V shape so that the lower ends are separated from each other, and the lower ends of the two main rope cables 4 are connected to the inside of each adjacent avalanche prevention fence 10.

  According to the first aspect of the present invention, two main rope cables 4 are suspended from one anchor 3 in a V shape so that the lower ends are separated from each other, and the lower ends of the two main rope cables 4 are prevented from being adjacent to an avalanche. Since the number of anchors 3 is one more than the number of avalanche prevention fences 10 to be installed by connecting to the inside of each fence 10, the number of anchors 3 required for the avalanche prevention fence 10 per unit is increased. Can be reduced.

  Also, since one avalanche prevention fence 10 is supported at both ends by two anchors 3 and the main cable 4 at a distance, the avalanche prevention fence 10 should move so as to rotate even if an avalanche load is applied. And can stably support the avalanche barrier 10.

FIG. 1 is a sectional view showing Example 1 of the avalanche prevention fence. 2 is a view taken in the direction of arrow A in FIG. FIG. 3 is a B-arrow view of FIG. FIG. 4 is a partially enlarged view showing a main part of FIG. FIG. 5 is a diagram showing a prior art of an avalanche prevention fence. FIG. 6 is a view showing another prior art of an avalanche prevention fence.

  The purpose of providing an avalanche prevention fence that is stable without moving even if an avalanche load is applied to the avalanche prevention fence 10 and that reduces the number of anchors 3 required for the avalanche prevention fence 10 per unit. , The two main rope cables 4 are hung down in a V shape so that the lower ends are separated from one anchor 3, and the lower ends of the two main rope cables 4 are connected to the inside of each adjacent avalanche prevention fence 10. It was realized by doing.

  1 to 4 show an avalanche prevention fence 10 according to Embodiment 1 of the present invention.

  The avalanche prevention fence 10 includes a plurality of anchors 3 placed on a substantially flat step 2 above a slope 1 inclined above a road, and a plurality of avalanches prevention fences installed on the slope 1. 10 is a suspension type in which main rope cables 4 are connected.

  The avalanche prevention fence 10 has a pair of right and left square steel pipe columns 11, a steel plate base plate 12 in contact with the mounting surface 1 at the lower end of each column, and a support that diagonally connects the columns 11 and the base plate 12. 13 and a frame member 14 in which a rectangular steel pipe is assembled in a rectangular shape between a pair of left and right columns 11 and a welded wire mesh 15 stretched over the entire surface of the mountain side of the frame member 14.

  Although the avalanche is received by the welded wire mesh 15, the welded wire mesh 15 is used instead of the steel pipe to prevent the powder snow-like avalanche from slipping through. In the embodiment, the height of the frame member 14 is about 0.5 m, the width of the frame member 14 is about 3 m, and the interval between the columns 11 is about 2 m.

  Anchors 3 are positioned above a plurality of avalanche fences 10 arranged in a row, and two main rope cables 4 are hung down in a V shape so that the lower ends are separated from one anchor 3 directly. The support rope 5 is connected to the lower end of the main cable 4. The support rope 5 is separated into a V shape in the vertical direction and is connected to the vertical direction of the support column 11.

  A support rope 5 at the lower end of two main rope cables 4 from one anchor 3 is connected to the inside of each adjacent avalanche prevention fence 10. That is, when viewed from one avalanche prevention fence 10, the main rope cable 4 is connected from the right column 11 to the right anchor 3 and from the left column 11 to the left anchor 3 and is suspended.

  One main rope cable 4 is suspended from the anchors 3 at both ends of the plurality of avalanche prevention fences 10 arranged in a row.

  As a result, the number of anchors 3 is one more than the number of avalanche prevention fences 10 to be installed, so the number of anchors 3 required for each avalanche prevention fence 10 is reduced.

  In the above embodiment, an example in which a plurality of avalanche prevention fences 10 are arranged in a line is shown, but adjacent avalanche prevention fences 10 may be alternately positioned above and below.

  In addition, an example in which two main rope cables 4 are hung directly from one anchor 3 is shown, but one main rope cable is hung from the anchor to the middle, and two main rope cables are hung from the middle to the bottom. It may be lowered.

  Further, although an example in which the welded wire mesh 15 is stretched on the frame member 14 as the avalanche prevention fence 10 is shown, horizontal steel pipes may be arranged vertically.

1 slope 3 anchor 4 main rope cable
10 Avalanche prevention fence

Claims (1)

  In an avalanche fence that connects multiple avalanche fences installed on slopes to anchors with main rope cables, the two main rope cables are suspended from one anchor in a V shape so that the lower ends are separated. The avalanche prevention fence which connected the lower end of the two main rope cables to the inside of each adjacent avalanche prevention fence.

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