When soil mass contains water in pores, pressure transmitted through the pore water is called pore water pressure or simply pore pressure. But why it is also called " Neutral Pressure"?
The pore pressure act equally in all directions and in all sides of the soil particles. So it does not cause the particles to press against each other and hence it is not effective in decreasing void ratio or in increasing shear strength of soil mass and remain neutral without changing soil mechanical properties. That is why it is called Neutral pressure.
:))good
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