![]() Now consider the condition shown in the figure. This is the baseline flow condition from which we will measure the seepage force. The seepage force is the extra force in the flow condition from the no-flow condition. To understand this force, we will take different and no-flow conditions. The flowing water in the soil causes seepage force. Seepage force (explained by different flow conditions) and quicksand Hydraulic gradient: It is the ratio of available head to the length of the flow path.Seepage force: It is caused by the flowing water in the soil particle.Permeability: It is the ability of water to flow in the soil.Datum head: Datum head is the elevation of the point considered from the datum.The pressure head at a point in the soil comes from the solid and water above it. Pressure head: This is the pressure divided by the unit weight of water.Therefore, the following are the learning objectives of this post. We need to understand the basic phenomenon that leads to quicksand conditions to discuss quicksand. To understand this, we must go across some typical concepts in geotechnical engineering. Quicksand is not any sand instead, it is the condition of sand which occurs due to high pore pressure. What are the conditions which make this happen? Is it safe to build a home on quicksand soil? All these questions will be addressed in this post. And you might have been thinking, what is so quick in quicksand? So let’s discuss what quicksand is and how quicksand affects you. You often come across the phrase quicksand while reading the geotechnical engineering. ![]()
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