Slope Stability Factors
a. Spreading rock
Type of rock or soil of the region is known penelitianharus, as well as the spread and the relationship between rocks. This needs to be done because of the physical properties and mechanical a different rocks with other rocks that hold the power load is also different.
b. Relief of the earth's surface
These factors affect the rate of erosion and deposition, and determine the direction of flow of surface water and soil.Hal is due to the steep area, high surface water runoff and erosion resulted in more intensive than in sloping areas, due to intensive erosion found many rock outcrops cause faster weathering. Weathered rock has a low power so that the stability of the slope is reduced.
c. slope geometry
Geometry covers high slope and slope angle. The slope and height strongly influence the slope stability. The greater the height of a slope and the slope stability kecil.Muka the shallow groundwater, making the most of the wet slopes and rock has a high water content, thus causing a low rock strength and slopes more prone to landslides.
d. Rock structureRock structure that greatly affect the stability of the slope is a fault, bedding and fractures. Therefore, to be considered in the analysis is a regional structure and the rock lokal.Struktur is weak areas as well as the leakage of water so that the rock becomes more prone to landslides.e. ClimateClimate affects temperature and rainfall, thus also affect the weathering process. The tropics are hot and humid with high rainfall will cause rock weathering process is much faster than the sub-tropical regions. Therefore, the thickness of the soil in the tropics is thicker and lower power than the fresh rock.f. Weathering rateRate of weathering affect the original properties of rocks, such as cohesion figures, the magnitude of the shear angle, bulk density, and others. The higher rate of weathering of the rock strength will decrease.g. Human activityIn addition to natural factors, human also contributed no small, such as a slope that was originally established as humans cut down shade trees, tillage is not good, not good drainage, excavation / mining, and other causes such slopes become unstable, so erosion and landslides easily happen.h. Physical and mechanical properties of rocksThe physical properties which affect the stability of rock slopes are: bulk density (density), porosity and water content. Compressive strength, tensile strength, shear strength, cohesion and angle of internal friction in a rock mechanical properties that also affect the slope.1) Weight of contents (unit weight)Rock bulk density will affect the amount of load on the surface of the landslide areas. So that the greater weight of the contents rocks, then the driving force causing slope erosion will be greater. Thus, the stability of the slope decreases.2) PorosityRocks that have large porosity will absorb water. Thus, the weight of its contents to be larger so it will reduce the stability of the slope.3) The water contentWater content is very great influence in slope stability analysis. The greater the water content in the rock, the pore water pressure became too great. Thus, the shear strength of the rock will be small. So that the stability will be reduced.4) compressive strength, tensile strength and shear strengthRock strength is usually expressed with a compressive strength (confined & unfined compressive strength), tensile strength (tensile strength) and shear strength (shear strength). Rocks which have great power will be more stable.5) Cohesion and angle of internal friction inThe greater cohesion and angle of internal friction in, the shear strength of rock will be greater as well.6) Effect of forceUsually the external forces that can affect the stability of slopes, among others: the vibration of heavy equipment working on or around the slopes, blasting, earthquakes, and others. All these forces will increase the shear stress that can lead to catastrophic landslide on the slopes.
Type of rock or soil of the region is known penelitianharus, as well as the spread and the relationship between rocks. This needs to be done because of the physical properties and mechanical a different rocks with other rocks that hold the power load is also different.
b. Relief of the earth's surface
These factors affect the rate of erosion and deposition, and determine the direction of flow of surface water and soil.Hal is due to the steep area, high surface water runoff and erosion resulted in more intensive than in sloping areas, due to intensive erosion found many rock outcrops cause faster weathering. Weathered rock has a low power so that the stability of the slope is reduced.
c. slope geometry
Geometry covers high slope and slope angle. The slope and height strongly influence the slope stability. The greater the height of a slope and the slope stability kecil.Muka the shallow groundwater, making the most of the wet slopes and rock has a high water content, thus causing a low rock strength and slopes more prone to landslides.
d. Rock structureRock structure that greatly affect the stability of the slope is a fault, bedding and fractures. Therefore, to be considered in the analysis is a regional structure and the rock lokal.Struktur is weak areas as well as the leakage of water so that the rock becomes more prone to landslides.e. ClimateClimate affects temperature and rainfall, thus also affect the weathering process. The tropics are hot and humid with high rainfall will cause rock weathering process is much faster than the sub-tropical regions. Therefore, the thickness of the soil in the tropics is thicker and lower power than the fresh rock.f. Weathering rateRate of weathering affect the original properties of rocks, such as cohesion figures, the magnitude of the shear angle, bulk density, and others. The higher rate of weathering of the rock strength will decrease.g. Human activityIn addition to natural factors, human also contributed no small, such as a slope that was originally established as humans cut down shade trees, tillage is not good, not good drainage, excavation / mining, and other causes such slopes become unstable, so erosion and landslides easily happen.h. Physical and mechanical properties of rocksThe physical properties which affect the stability of rock slopes are: bulk density (density), porosity and water content. Compressive strength, tensile strength, shear strength, cohesion and angle of internal friction in a rock mechanical properties that also affect the slope.1) Weight of contents (unit weight)Rock bulk density will affect the amount of load on the surface of the landslide areas. So that the greater weight of the contents rocks, then the driving force causing slope erosion will be greater. Thus, the stability of the slope decreases.2) PorosityRocks that have large porosity will absorb water. Thus, the weight of its contents to be larger so it will reduce the stability of the slope.3) The water contentWater content is very great influence in slope stability analysis. The greater the water content in the rock, the pore water pressure became too great. Thus, the shear strength of the rock will be small. So that the stability will be reduced.4) compressive strength, tensile strength and shear strengthRock strength is usually expressed with a compressive strength (confined & unfined compressive strength), tensile strength (tensile strength) and shear strength (shear strength). Rocks which have great power will be more stable.5) Cohesion and angle of internal friction inThe greater cohesion and angle of internal friction in, the shear strength of rock will be greater as well.6) Effect of forceUsually the external forces that can affect the stability of slopes, among others: the vibration of heavy equipment working on or around the slopes, blasting, earthquakes, and others. All these forces will increase the shear stress that can lead to catastrophic landslide on the slopes.
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