A mercury manometer type tensiometer has been installed in a mustard field. The manometer shows a Hg reading of 55 cm above the Hg level in the manometer cup at a particular time of observation which is equivalent to 0.64 atmospheric tension. The level of mercury in the cup is 10 cm above the ground. Calculate the soil depth at which the tensiometer has been installed. The density of Hg is 13.6 ???3⁄.

A mercury manometer type tensiometer has been installed in a mustard field. The manometer shows a Hg reading of 55 cm above the Hg level in the manometer cup at a particular time of observation which is equivalent to 0.64 atmospheric tension. The level of mercury in the cup is 10 cm above the ground. Calculate the soil depth at which the tensiometer has been installed. The density of Hg is 13.6 ???3⁄.

Principles of Geotechnical Engineering (MindTap Course List)

9th Edition

ISBN:9781305970939

Author:Braja M. Das, Khaled Sobhan

Publisher:Braja M. Das, Khaled Sobhan

Chapter4: Plasticity And Structure Of Soil

Section: Chapter Questions

Problem 4.4P: Results from a liquid limit test conducted on a soil are given below. a. Determine the liquid limit...

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Q1/ specimen of the fine-grained soil, 75 mm in diameter and 20 mm thick was tested in an oedometer in a laboratory. At applying pressure (240 kN/m²), the time with dial gauge readings are: Time (min) 0 Settlement (mm) 0 0.25 1 0.22 0.42 4 9 0.6 0.71 16 0.79 36 64 100 0.86 0.91 1.04 d 1- Find Coefficient of consolidation in cm²/s using root time and TV90% = 0.848. Scanned by TapScanner
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Q1/ specimen of the fine-grained soil, 75 mm in diameter and 20 mm thick was tested in an oedometer in a laboratory. At applying pressure (240 kN/m²), the time with dial gauge readings are: Time (min) 0 Settlement (mm) 0 0.25 1 0.22 0.42 Vertical pressure (kPa) 15 Settlement (mm) 0.1 Void ratio 1.88 4 0.6 30 0.11 1.87 9 0.71 16 0.79 And the void ratio and settlement for each load increment is shown in the table below. 60 0.21 1.85 120 1.13 1.72 100 1.04 36 64 0.91 0.86 240 2.17 1.57 480 3.15 1.43 1- Find Coefficient of consolidation in cm²/s using root time and TV90% = 0.848. 2- Find Preconsolidation pressure (oc) and compression index (Cc). Scanned by TapScanner