Rabu, 26 April 2017
Landslides usually occur in areas where there are many slopes with a slope of above 45 degrees, although it may also occur on flat ground but the chances are smaller. To prevent the occurrence of landslides there should be knowledge of the factors of landslide occurrence. Here are the factors that cause landslides:
Covering the weather and rainfall in the area where the higher rainfall level in the slopes will be the greater the risk of landslides, especially if the absence of a vegetation penututp that serves as a retaining ground and topographic water absorbers including the steepness of a place will also affect The size of the thrust down, the more steep the greater the potential force as it is affected by gravity.
2. Geological Condition
Covering the type and level of weathering of rocks and the structure of the soil layer also contributes to the triggering of landslides. The less dense inner layer structure will reduce the retaining power of the above ground layer. So also with the level of weathering in which rock is vulnerable to cracks, especially if an earthquake occurs.
3. Water Condition
Poor drainage conditions cause the accumulation of water at one point so that water may seep into the inner layer and eros part In addition, the degree of dissolution and hydrostatic pressure also affect due to the compressive force to balance by gravity.
4. External Vibration
Land conditions that have been unstable due to water pressure and steep land would be very vulnerable to collapse if you get the vibration from the outside whether it comes from earthquakes, vibration of the engine, explosion or other vibrations. With the vibration there will be a shift so that the ground will be cracked and detached from the parent ground.