Explain the modes of failure with different factors
influencing the decrease in shear strength of slope....
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Civil Engineering
Explain the modes of failure with different factorsinfluencing the decrease in shear strength of slope. Draw neatsketches wherever necessary.
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Ans Slope failure occurs when the downward movements ofmaterial due to gravity and shearstresses exceeds the shear strengthTherefore factors that tend to increase the shear stresses ordecrease the shear strength increase the chances of failure of aslopeDifferent processes can lead to reduction in the shear strengthsof rock massIncreased pore pressure cracking swelling decomposition ofclayey rock fills creep under sustained loads leaching strainsoftening weathering and cyclic loading are common factors thatdecrease the shear strength ofrock massIn contract to this the shear stress in rock mass may increasedue to additional loadsat the top of the slope and increase in water pressure in cracks atthe top of the slope increase in soil weight due to increasedwater
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