A 20 m thick clay layer is sandwiched between a silty sand layer and a gravelly sand layer. The layer experiences 30 mm settlement in 2 years.Given :TV=⎧⎪⎪⎨⎪⎪⎩π4(U100)2 for U≤60∘/∘1.784−0.933 log10(100−U)U>60∘/∘Where TV is the time factor and U is the degree of consolidation in %If the coefficient of consolidation of the layer is 0.003 cm2/s, the deposit will experience a total of 50 mm settlement in the next _____ years.4.43

A 20 m thick clay layer is sandwiched between a silty sand layer and a

1.	A 20 m thick clay layer is sandwiched between a silty sand layer and a gravelly sand layer. The layer experiences 30 mm settlement in 2 years.Given :TV=⎧⎪⎪⎨⎪⎪⎩π4(U100)2 for U≤60∘/∘1.784−0.933 log10(100−U)U>60∘/∘Where TV is the time factor and U is the degree of consolidation in %If the coefficient of consolidation of the layer is 0.003 cm2/s, the deposit will experience a total of 50 mm settlement in the next _____ years.4.43
Answer» A 20 m thick clay layer is sandwiched between a silty sand layer and a gravelly sand layer. The layer experiences 30 mm settlement in 2 years. Given : $T_{V} = ⎧ ⎪⎪ ⎨ ⎪⎪ ⎩ \begin{matrix} \frac{π}{4} {(\frac{U}{100})}^{2} & f o r U \leq 60^{\circ /_{\circ}} 1.784 - 0.933 l o g_{10} (100 - U) & U > 60^{\circ /_{\circ}} \end{matrix}$ Where $T_{V}$ is the time factor and U is the degree of consolidation in % If the coefficient of consolidation of the layer is $0.003 c m^{2} / s$ , the deposit will experience a total of 50 mm settlement in the next _____ years. 4.43

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