A hole was made in a stiff saturated soil having a Gs = 2.71 and moisture content of 0.30. The sand layer underlying the clay was observed to be under artesian pressure. Water in the drill hole rose to a height of 6.30 meters above the top of the sand layer Exploratory drill hole 10 m 6.3 m 4.5 m Saturated clay Sand a. If an open excavation is to be made in the clay, determine the safe depth of excavation before the bottom heaves. Round your final answer to three significant figures. b. How much is the pressure at the interface of the clay and sand? c. If a factor of safety of 2.0 is to be ensured, how deep should be the excavation from the ground surface? Note: Draw Free Body Digram and show full solution Topic: Soil Stresses (Soil Mechanics_
A hole was made in a stiff saturated soil having a Gs = 2.71 and moisture content of 0.30. The sand layer underlying the clay was observed to be under artesian pressure. Water in the drill hole rose to a height of 6.30 meters above the top of the sand layer Exploratory drill hole 10 m 6.3 m 4.5 m Saturated clay Sand a. If an open excavation is to be made in the clay, determine the safe depth of excavation before the bottom heaves. Round your final answer to three significant figures. b. How much is the pressure at the interface of the clay and sand? c. If a factor of safety of 2.0 is to be ensured, how deep should be the excavation from the ground surface? Note: Draw Free Body Digram and show full solution Topic: Soil Stresses (Soil Mechanics_
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:A hole was made in a stiff saturated soil having a Gs = 2.71 and moisture content of 0.30. The sand layer underlying
the clay was observed to be under artesian pressure. Water in the drill hole rose to a height of 6.30 meters above the
top of the sand layer
%3D
Exploratory drill hole
10 m
6.3 m
4.5 m
Saturated clay L Sand
a. If an open excavation is to be made in the clay, determine the safe depth of excavation before the bottom
heaves. Round your final answer to three significant figures.
b. How much is the pressure at the interface of the clay and sand?
c. f a factor of safety of 2.0 is to be ensured, how deep should be the excavation from the ground surface?
Note: Draw Free Body Digram and show full solution
Topic: Soil Stresses (Soil Mechanics_
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