Pore water pressure monitoring<br>It is mainly used to measure the rising and dissipation process of excess static pore water pressure of silt under the action of surcharge. The number of pore water pressure monitoring: four groups of observation points of pore water pressure, five for each group, with the setting depth of 6 m, 10 m, 14 m, 18 m, 22 m respectively.<br>
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