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The stratigraphy in a site from top to bottom are (1) 4.5 m thick sand; (2)...

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Civil Engineering

The stratigraphy in a site from top to bottom are (1) 4.5 mthick sand; (2) 4.5 m thick clay; (3) impermeable shale. The watertable is at a depth of 2 m below ground. The sand above the watertable has a void ratio of 0.52 and a saturation degree of 37%. Theclay has a moisture content of 42%. The specific gravity of boththe sand and clay is 2.65. If constructing a foundation whosebottom is at a depth of 3m, resulting in the extra stress at thetop and the bottom of the clay layer is 100 kPa and 40 kPa,respectively. According to the consolidation test, the void ratioof the clay corresponding to 50, 100 and 200 kPa are 1.02, 0.922and 0.828, respectively. The settlement of the clay layer willbe_____________(mm). (One-dimensional settlement is applicable. Thedensity of water is 1000 kg/m3)

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