Causes of Liquefaction of Soil

You might have been to a beach or near a river bank, have you ever noticed the cohesion-less sands there? I am currently working in a project which is in a mountain range with river crossing through and is actually construction of a dam, during my travelling so many timesI have witnessed people that are, with the help of some bucket mounted on ropes, trying to extract the sand to use it in…
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