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Refer to Problem 9.6. It is required to make an open excava- tion of 18 ft in the saturated clay. To avoid heaving, the cut will be filled with water similar to that shown in Figure 9.6. What should be the height of water, h, in the excavation?

Refer to Problem 9.6. It is required to make an open excava- tion of 18 ft in the saturated clay. To avoid heaving, the cut will be filled with water similar to that shown in Figure 9.6. What should be the height of water, h, in the excavation?

Structural Analysis
Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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please answer 9.7

Ysat = 120 lb/ft3 H 21 ft 13.5 ft A 6 ft Ysat = 114 lb/ft³ Saturated clay Sand FIGURE 9.6
Transcribed Image Text:Ysat = 120 lb/ft3 H 21 ft 13.5 ft A 6 ft Ysat = 114 lb/ft³ Saturated clay Sand FIGURE 9.6
9.6 An exploratory drill hole was made in a stiff saturated clay (see Figure 9.28). The sand underlying the clay was ob- served to be under artesian pressure. Water in the drill hole rose to a height of 18 ft above the top of the sand layer. If an open excavation is to be made in the clay, how deep can the excavation proceed before the bottom heaves? Refer to Problem 9.6. It is required to make an open excava- tion of 18 ft in the saturated clay. To avoid heaving, the cut will be filled with water similar to that shown in Figure 9.6. What should be the height of water, h, in the excavation? 9.7
Transcribed Image Text:9.6 An exploratory drill hole was made in a stiff saturated clay (see Figure 9.28). The sand underlying the clay was ob- served to be under artesian pressure. Water in the drill hole rose to a height of 18 ft above the top of the sand layer. If an open excavation is to be made in the clay, how deep can the excavation proceed before the bottom heaves? Refer to Problem 9.6. It is required to make an open excava- tion of 18 ft in the saturated clay. To avoid heaving, the cut will be filled with water similar to that shown in Figure 9.6. What should be the height of water, h, in the excavation? 9.7
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