An exploratory drill hole was made in a stiff saturated clay having a moisture content of 29% and G, = 2.68 (Figure 9.27). The sand layer underlying the clay was observed to be under artesian pressure. Water in the drill hole rose to a height of 6 m above the top of the sand layer. If an open excavation is to be made in the clay, determine the safe depth of excavation before the bottom heaves. Exploratory drill hole 10 m 6 m 4.5 m Saturated clay Sand
An exploratory drill hole was made in a stiff saturated clay having a moisture content of 29% and G, = 2.68 (Figure 9.27). The sand layer underlying the clay was observed to be under artesian pressure. Water in the drill hole rose to a height of 6 m above the top of the sand layer. If an open excavation is to be made in the clay, determine the safe depth of excavation before the bottom heaves. Exploratory drill hole 10 m 6 m 4.5 m Saturated clay Sand
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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An exploratory drill hole was made in a stiff saturated clay having a moisture content of 29% and Gs = 2.68 (Figure 9.27). The sand layer underlying the clay was observed to be under artesian pressure. Water in the drill hole rose to a height of 6 m above the top of the sand layer. If an open excavation is to be made in the clay, determine the safe depth of excavation before the bottom heaves.
Transcribed Image Text:An exploratory drill hole was made in a stiff saturated clay having a
moisture content of 29% and G, = 2.68 (Figure 9.27). The sand layer
underlying the clay was observed to be under artesian pressure. Water
in the drill hole rose to a height of 6 m above the top of the sand layer. If
an open excavation is to be made in the clay, determine the safe depth of
excavation before the bottom heaves.
Exploratory drill hole
10 m
6 m
4.5 m
Saturated clay
Sand
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