An exploratory drill hole was made in a stiff saturated clay, as shown in Figure 1, having a moisture content of 25% and Gs = 2.56. The sand layer underlying the clay was observed to be under artesian pressure. Water in the drill hole rose to a height of 3 m above the top of sand layer. If an open excavation is to be made in the clay. a.What is the maximum depth of excavation before the bottom heaves? b.What would be the required height of water inside the cut in order to ensure a factor of safety of 1.5?

An exploratory drill hole was made in a stiff saturated clay, as shown in Figure 1, having a moisture content of 25% and Gs = 2.56. The sand layer underlying the clay was observed to be under artesian pressure. Water in the drill hole rose to a height of 3 m above the top of sand layer. If an open excavation is to be made in the clay. a.What is the maximum depth of excavation before the bottom heaves? b.What would be the required height of water inside the cut in order to ensure a factor of safety of 1.5?

Residential Construction Academy: House Wiring (MindTap Course List)

5th Edition

ISBN:9781337402415

Author:Gregory W Fletcher

Publisher:Gregory W Fletcher

Chapter10: Electrical Box Installation

Section: Chapter Questions

Problem 5RQ: Explain why it is important to have the proper setout when installing electrical boxes. (Objective...

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