Pore water pressure in soil will change the effective stress of the soil;
孔隙水压力会改变土体中的有效应力；
The invention also discloses a use method of the pore water pressure gauge.
本发明还公开了上述孔隙水压力计的使用方法。
Parameter of pore water pressure is not constant and changes with time.
孔压系数随时间而变化，并不是常数。
Parameter of pore water pressure is not constant and changes with time.
孔压系数随时间而变化，并不是常数。
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