JPS5850204A - Prevention of bottom snowslide - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] Conventionally, in order to prevent avalanches, the avalanche path has been de-energized, guided, and protected by using preparation tanks, concrete IJ-t retaining walls, etc. to guide the avalanche in a direction that does not cause damage or to stop the avalanche. I expected a lot of snowfall,
Not only is it difficult to judge the natural environment such as slope length, slope angle, topography, temperature, and wind, but also because snowfall conditions are not uniform every year, it is difficult to judge economic effects, construction costs, and construction methods. It was extremely difficult to prevent damage.

Therefore, various construction methods such as avalanche prevention fences, hanging frames, hanging fences, stairs, and avalanche prevention piles that try to stop avalanches at the source have been considered, and are comprehensively combined to prevent, reduce, guide, and
Although avalanche prevention measures have been implemented, there are still many cases of buildings being overturned or damaged due to unexpected snowfall, such as large snowfalls with a probability of 30 to 50 years.In fact, the damage caused by avalanches is not just economic or material loss. The current situation is that many people's lives are being taken away.

In addition, facilities constructed using conventional construction methods have the disadvantage that when the parts used are relatively large and damaged, it is difficult and labor-intensive to cause secondary damage and to clean up afterwards.

In view of the above-mentioned drawbacks, the object of the present invention is to prevent bottom avalanches (all layers) by suppressing and stopping ground sliding of snow on slopes in avalanche source areas.

The details will be explained below with reference to an illustrative diagram.
Deploy vertical and horizontal ropes l...-2... in the deep ground where an avalanche occurs in IF, so as to intersect eyes of appropriate size.
The ends are stretched with suspension wires 3, and the skeleton vertical and horizontal ropes 1.
.

・#2. - This is a structure in which an appropriate number of abrasive plate numbers or abrasive plate numbers' are fixed to the fixing fittings 5 or binding band wires 5'.

As a result of research, the movement of snow on slopes can be classified into displacement creep that occurs inside the snow and glide that moves up the surface of the slope, but bottom avalanches (full thickness) are mainly caused by glide that slides on the surface of the slope. If small resistance elements that can stop this slippage at a small rate are installed and fixed on the slope and arranged at small intervals and small pitches over the entire area of the predicted avalanche source,
It has been found that the glide can be stopped before it becomes too thick and can prevent the movement of snow on the slope.

slope length)), slope angle (f), snow cover R (d), snow cover density (r), viscosity coefficient (7C), /r()''i number (/
/), slope voltage (S I found out that it can be made small. Therefore, the resistor does not receive a large slope voltage, so
As long as it is not a large-scale resistive object and has a certain amount of soil bearing capacity, it can be constructed by burying it in the ground or driving it into the ground.

The resistor must not deform or collapse due to external forces such as snow sedimentation pressure during construction or from falling rocks, etc., and there are local conditions where it is difficult to expect it to be constructed due to the topography and geology of the avalanche source. Therefore, during construction, for example, vertical ropes are hung at appropriate intervals, and the ropes are attached to stable foundations or bedrock above the slope or on the opposite side beyond the top with anchors. A must-have for dividing slopes with these few vertical ropes! ! Horizontal ropes are stretched at appropriate intervals and fixed with cross clips at the intersections with the public inspection ropes. The horizontal coupe can also be pulled out as needed and fixed to a tree or anchor outside the designated area at its length.

In this way, the resistor is driven across the horizontal rope stretched over the entire area of the avalanche source, or is buried in the soil to a predetermined depth, and is tied and fixed to the horizontal coupe with a fixing metal fitting, a bind wire, or the like. %
In soft ground, a fixing method is used to prevent the resistor from sinking, and in places where it is not possible to fix the resistor by driving it into place, such as in rocks, fix it to an a-pu so that it does not slide or move.

As mentioned above, the present invention not only allows small resistors to be arranged at any pitch, but also allows construction of small resistors on soft ground or in places where fixation is impossible. Not only is it easy to achieve the intended purpose, but it is also easy to install, and secondary damage and damage in the event of damage are minimized. Since the wire rope does not have to be loaded with rope K, and only the positioning and the hanging load of some of the resistors are required, there is no urgent load on the wire rope, and resources can be saved. In addition, the native or vegetated trees at the construction site of this project can grow without bending in two directions and then becoming an upright tree trunk, so it is possible to grow an upright tree in the position, which is an i-effect. This is an invention that brings about great effects and advantages that have never existed before, such as the ability to quickly create a permanent forest that prevents avalanches from existing avalanche sources.

(4. Brief explanation of the drawings The drawing is a plan view of an example of the present invention, and Figure 2 is an enlarged sloped view of an example of a resistor.
-G, &,...: Horizontal rose, 3: Suspension wire, 4:
Resistance element, 4': Resistance plate, 5: Fixing metal fittings, 5': Binding wire 6: Anchor bolt, ): Cross clip.

Applicant: Asahi Wire Mesh Co., Ltd.

Claims (1)

[Claims] Vertical and horizontal ropes are placed in the avalanche-prone area of the snow-covered slope area so as to intersect with large-sized eyes, and the ends of the ropes are strung with suspension wires. A method for preventing bottom avalanche by fixing a resistor or a resistor plate with a fixing metal fitting or binding wire.