please can u provide me a ppt for construridg challenge of bridge in hilly areas which i can present in seminar
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construction of roads in hilly areas ppt
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please can u provide me a ppt for construridg challenge of bridge in hilly areas which i can present in seminar
29-03-2017, 02:18 PM
Gravitational forces are always acting on a mass of earth or rock under a slope. As long as the force of the mass is equal to or greater than the gravitational forces, the forces are in equilibrium, the mass is in equilibrium and the motion does not occur. An imbalance of forces results in slope and movement faults in creep forms, falls, slides, avalanches or flows. The fault occurs when the driving forces exceed the strong forces.
Slope faults are a major problem for road safety and stability. Such slope faults as landslides are predominant in hot and humid climates and occur during years of unusually heavy rainfall or during periods of heavy rainfall or during wet years. However, prediction of slip failure is often uncertain and slope stability is an important element depending on slope geometry, inherent soil resistance and soil or pore pressure characteristics.
The role is related to slope failure in mountainous terrain where natural faults occur due to slope, such as landslides or landslides.
A landslide is activated if the shear stresses (tangential) that appear in a soil mass exceed the magnitudes that the soil is able to withstand. An increase in the active shear force may be due to erection of an engineering structure in the slope, increase in weight of soil mass, higher gradients, etc. A reduction of the resistance forces can be due to the removal of the lateral support, Cut through the slope. In such a case, the prediction of slip failure is often uncertain and slope stability often becomes costly.
Erosion is the natural process of removing soil particles by external agents such as water or width. This implies rain that is responsible for the removal of the surface layer, resulting in ravines approximately 10-60 cm deep. However, over time the crossings and ravines deepen further and cause the slope to overflow, precipitating the instability of the slope. Slope protection generally means the engineering feature composed of suitable material constructed as a selectively thin layer on a slope otherwise vulnerable to erosion.
The vegetation is an important slope stabilizer. The hillside plantation with thick native vegetation serves to strengthen shallow soils with root systems, prevents erosion, deters infiltration and increases infiltration pressures. The vegetation also discourages the desiccation that causes cracking. Deep cracks provide channels for rainwater to enter the sliding mass, increasing the infiltration pressure within the mass, as well as applying hydrostatic pressure against the walls of the crack or crack.
Sowing or planting can also be used for treating slopes. An asphalt cover technique can be used in which the slopes are prepared in vast seed beds. The asphalt mulch is then spread by a sprinkler. The asphalt film gradually disintegrates, its place is gradually occupied by a carpet of green vegetation. The grass carpet, which supplants the asphalt film, acts as an immediate cover for the slopes until the most ingrained species of shrubs and trees develop and rooted.
Slope faults are a major problem for road safety and stability. Such slope faults as landslides are predominant in hot and humid climates and occur during years of unusually heavy rainfall or during periods of heavy rainfall or during wet years. However, prediction of slip failure is often uncertain and slope stability is an important element depending on slope geometry, inherent soil resistance and soil or pore pressure characteristics.
The role is related to slope failure in mountainous terrain where natural faults occur due to slope, such as landslides or landslides.
A landslide is activated if the shear stresses (tangential) that appear in a soil mass exceed the magnitudes that the soil is able to withstand. An increase in the active shear force may be due to erection of an engineering structure in the slope, increase in weight of soil mass, higher gradients, etc. A reduction of the resistance forces can be due to the removal of the lateral support, Cut through the slope. In such a case, the prediction of slip failure is often uncertain and slope stability often becomes costly.
Erosion is the natural process of removing soil particles by external agents such as water or width. This implies rain that is responsible for the removal of the surface layer, resulting in ravines approximately 10-60 cm deep. However, over time the crossings and ravines deepen further and cause the slope to overflow, precipitating the instability of the slope. Slope protection generally means the engineering feature composed of suitable material constructed as a selectively thin layer on a slope otherwise vulnerable to erosion.
The vegetation is an important slope stabilizer. The hillside plantation with thick native vegetation serves to strengthen shallow soils with root systems, prevents erosion, deters infiltration and increases infiltration pressures. The vegetation also discourages the desiccation that causes cracking. Deep cracks provide channels for rainwater to enter the sliding mass, increasing the infiltration pressure within the mass, as well as applying hydrostatic pressure against the walls of the crack or crack.
Sowing or planting can also be used for treating slopes. An asphalt cover technique can be used in which the slopes are prepared in vast seed beds. The asphalt mulch is then spread by a sprinkler. The asphalt film gradually disintegrates, its place is gradually occupied by a carpet of green vegetation. The grass carpet, which supplants the asphalt film, acts as an immediate cover for the slopes until the most ingrained species of shrubs and trees develop and rooted.
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