Principles of Foundation Engineering (MindTap Course List)
9th Edition
ISBN: 9781337705028
Author: Braja M. Das, Nagaratnam Sivakugan
Publisher: Cengage Learning
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Chapter 15, Problem 15.3P
To determine
Find the settlement of the soil.
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A block of rock has edge length (0.94m
,1.26m ,1.15 m ) the grain density is 2.87 g/cm3
find the porosity?
At what depth would the total vertical stress in a deposit of clay (e = 0.9, Gs = assume, consider 4 significant figures) overlain by 3 meters of sand (e = 1.1, assume Gs with 4 significant figures) be 220 kPa if the water table is 2 meters below the ground surface and saturation of 20 percent exists above it? What is the effective stress at the same depth? Draw your stress diagrams up until 2 meters deeper than the point at which the stress is 220 kPa.
Problem 1:
For uncompacted sandstone formation, the interval transit time was recorded as following:
Atiog
= 12 msec/ft.
Atsh = 125 msec/ft.
Atf = 189 msec/ft.
Calculate the formation porosity if the area:
1- Water zone
2- Oil zone
3- Gas zone
werm
、スe
Sonic loy
Chapter 15 Solutions
Principles of Foundation Engineering (MindTap Course List)
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- What factors affect the permeability values of any rock.arrow_forwardd) A sandstone core plug is 1 inch in diameter, 2 inches long, and has a mass of 56.6 grams. When completely saturated with water, its mass increases to 60.9 grams. Compute the rock porosity.arrow_forwardA consolidated-undrained test on a normally consolidate clay yield the following results: Confining Pressure = 151 KPa; Deviator Stress = 187 KPa; Pore Pressure = 71 KPa. Calculate the consolidated undrained friction angle. Please answer this asap. For upvote. Thank you very mucharrow_forward
- A 5.1 m thick clay soil with a current overburden pressure of 89 kPa is going to experience an additional stress of 89 kPa after a new structure is built. If it was determined that the clay is normally consolidated has an initial void ratio of 1.2, a recompression index of 0.07, and a compression index of 0.47. Determine the total amount of settlement that is expected to occur. Provide your answer in meters to 3 decimal places.arrow_forwardh) Typical jointed rock core samples for BH5 shown in Figure 2, calculate RQD value for this core.arrow_forwardA consolidated-undrained test on a normally consolidate clay yield the following results: Confining Pressure = 159 KPa; Deviator Stress = 182 KPa; Pore Pressure = 79 KPa. Calculate the consolidated undrained friction angle.arrow_forward
- At what depth would total the vertical stress in a deep deposit of clay (e = 1.1, Gs = 2.74) be 100 kPa if the water table is 1 m below the ground surface and the above the water surface a saturation degree of 70 % exists. What is the effective stress at the same depth?arrow_forwardWhat is the pore compressibility of a rock with a bulk volume of 22 cm3, porosity of 19% and pore volume decreases by 0.06 cm3 when subjected to a confining pressure of 670psi?arrow_forwardQuestion 7 During the glacial period, the in situ stress of a clay formation was approximately 20,000 psf. Today, the in situ stress of that same clay is approximately 9500 psf. Which of the values below are most likely the OCR of the clay? O 1.65 O2.10 O 0.50 1.00arrow_forward
- Find the C, and the "apparent" OCR for a superficial clay stratum that is 4m thick. The water is at the surface. A sample of the clay has a water content of 27.9%, and a specific gravity of 2.65. An oedometer test showed the following results: Voids Ratio 0.736 0.733 0.73 0.675 0.638 0.6 Vertical Effective Stress 15 28 60 230 480 930arrow_forwardWhat is the rating of the rock under " Strength of Intact Rock Material" parameter? A 7 B 15 C) 12 (D) 1arrow_forwardKnowing that the compression index, Cc = 0.333, and the preconsolidation pressure s’c = 140 kPa with an initial void ratio e0 = 0.85 for a H = 3 m thick clay layer which is subjected to a new loading for an embankment resulting in a stress increase to 200 kPa; what is the expected consolidation settlement? Provide answer below in meters (m).arrow_forward
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