Fundamentals of Geotechnical Engineering (MindTap Course List)
5th Edition
ISBN: 9781305635180
Author: Braja M. Das, Nagaratnam Sivakugan
Publisher: Cengage Learning
expand_more
expand_more
format_list_bulleted
Concept explainers
Question
Chapter 8, Problem 8.11P
To determine
Find the void ratio and the saturated unit weight of the soil.
Find the total stress, effective stress, and pore water pressure at 5 m depth into the bottom of the lake.
Expert Solution & Answer
Trending nowThis is a popular solution!
Students have asked these similar questions
The depth of water in a lake is 4 m. The soil at the bottom of thelake consists of sandy clay. The water content of the soil wasdetermined to be 25.0%. The specific gravity of the soil grainsis 2.70. Determine the void ratio and the unit weight of the soil.What would be the total stress, effective stress, and pore waterpressure at the 5 m depth into the bottom of the lake?
The soil profile shown consists of dry sand (7-m thick) which overlies a layer of clay (6-m thick). Ground water table is located at the interface of the sand and clay. The effective stress at the bottom of the clay layer was determined. If the water taable rises to the top of the ground surface, what is the change in effective stress (kpa) at the bottom of the clay layer?
For sand layer: Void Ratio= 0.89
SG= 2.67
Degree of Saturation= 0.62
For claylayer: Void Ratio= 0.92
SG=2.72
Question 20
A soil profile consists of sand (5-m thick) which overlies a layer of clay (9-m thick). Ground water table is located at the interface of the sand and clay. The effective stress at the bottom of the clay layer was determined. If the water table rises to the top of the ground surface, what is the change in the effective stress (in kPa) at the bottom of the clay layer?
For sand layer: Void Ratio = 0.82, Specific gravity = 2.68, Degree of Saturation = 0.6
For clay layer: Void Ratio = 0.92, Specific gravity = 2.86
Round off to two decimal places.
Chapter 8 Solutions
Fundamentals of Geotechnical Engineering (MindTap Course List)
Ch. 8 - Prob. 8.1PCh. 8 - Prob. 8.2PCh. 8 - Prob. 8.3PCh. 8 - Prob. 8.4PCh. 8 - Prob. 8.5PCh. 8 - Prob. 8.6PCh. 8 - Prob. 8.7PCh. 8 - Prob. 8.8PCh. 8 - Prob. 8.9PCh. 8 - The soil profile at a site consists of 10 m of...
Ch. 8 - Prob. 8.11PCh. 8 - Prob. 8.12PCh. 8 - Prob. 8.13PCh. 8 - Prob. 8.14PCh. 8 - A sand has Gs = 2.66. Calculate the hydraulic...Ch. 8 - Prob. 8.16PCh. 8 - A point load of 1000 kN is applied at the ground...Ch. 8 - Point loads of magnitude 9, 18, and 27 kN act at...Ch. 8 - Refer to Figure 8.13. The magnitude of the line...Ch. 8 - Refer to Figure 8.24. Determine the vertical...Ch. 8 - Consider a circularly loaded flexible area on the...Ch. 8 - A flexible circular footing of radius R carries a...Ch. 8 - The plan of a flexible rectangular loaded area is...Ch. 8 - Refer to Figure 8.26. The circular flexible area...Ch. 8 - Refer to Figure 8.27. The flexible area is...Ch. 8 - Prob. 8.26CTPCh. 8 - Prob. 8.27CTP
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, civil-engineering and related others by exploring similar questions and additional content below.Similar questions
- Solve the following problems. Provide complete solutions and summary of answers. The water table in soil deposit is 2 meters below the ground surface. The soil above the water table has a dry unit weight of 14.85 kN/cu. Meter. The saturated unit weight of the soil is 20.58 kN/cu.meter. Determine the following: a. Total Stress at a point 4.80 meters below the ground b. Total Pore pressure 4.80 meters below the ground c. Total effective stress at a point 4.80 meters below the ground.arrow_forwardA layer of soil has the following properties: void ratio = 0.44, effective diameter = 12 μm, capillary constant C = 0.18 cm2 . Groundwater table is 10 m below the ground surface. (a) Find the height of capillary rise in the soil in mm. (b) What is the effective stress in kPa at 7 m depth if unit weight of solids is 25.55 kN/m3 and soil above the capillary zone is 40 % saturated? (c) What is the effective stress in kPa at 14 m depth?arrow_forwardDry Sand H, Groundwater Table Clay H2 Refer to the soil profile shown. Given H1 = 9.48 m., and H2 = 4.41 m. If the ground water table rises by 2.94 meters, determine the change in effective stress (numerical value only, in kPa) at the bottom of the clay layer. Properties of dry sand: Gs = 2.58, e = 0.67. Properties of clay: Gs = 2.74, e = 0.87. Round off to two decimal places.arrow_forward
- A soil profile consists of sand (6-m thick) which overlies a layer of clay (5-m thick). Ground water table is located at the interface of the sand and clay. The effective stress at the bottom of the clay layer was determined. If the water table rises to the top of the ground surface, what is the change in the effective stress (in kPa) at the bottom of the clay layer? For sand layer: Void Ratio = 0.72, Specific gravity = 2.61, Degree of Saturation = 0.6 For clay layer: Void Ratio = 0.99, Specific gravity = 2.72 Round off to two decimal places.arrow_forward2. A submerged clay layer has a thickness of 8m. the water content of the soil particles is 50%. The specific gravity of the soil particle is 2.78. a.) Determine the saturated unit weight of the clay b.) Determine the total stress at the bottom layer of the clay c.) Determine the effective stress at the bottom of the clay layerarrow_forwardA river has a depth of 9m, 12m, and 7m during the months of February, March, and April, respectively. The river bed has a layers of soil shown below. Assuming that the river bed does not change, determine the following: The effective stress, 9m below the river bed during the month of March, in kilopascals? The effective stress, 9m below the river bed during the month of February, in kilopascals? The effective stress, 9m below the river bed during the month of April, in kilopascals?arrow_forward
- A soil profile consists of sand (5-m thick) which overlies a layer of clay (4-m thick). Ground water table is located at the interface of the sand and clay. The effective stress at the bottom of the clay layer was determined. If the water table rises to the top of the ground surface, what is the change in the effective stress (in kPa) at the bottom of the clay layer? For sand layer: Void Ratio = 0.82, Specific gravity = 2.75, Degree of Saturation = 0.76 For clay layer: Void Ratio = 1.09, Specific gravity = 2.76arrow_forwardA soil profile of sand (7m thick) which overlies a layer of clay (8m thick). Ground water table is located at the interface of the sand and clay. The effective stress at the bottom of the clay layer was determined. If the water table rises to the top of the ground surface, what is the change in effective stress (in kpa) at the bottom of the layer? for sand layer: void ratio = 0.81, specific gravity = 2.74, degree of saturation = 0.65 for the clay layer: void ratio = 0.85, specific gravity = 2.85arrow_forwardMy soil has the following profile with depth: 0-10 ft gammat = 115 pcf 10-30 ft gammasat = 98 pcf 30-55 ft gammasat = 110 pcf where gamma is the unit weight The water table is at a depth of 10 ft. Plot the total stress, effective stresses, and pore pressure versus depth. Show the calculations, and assume there is no capillarity.arrow_forward
- A ground profile consists of 2.0 meters silty sand underlain by 3.0 meters of clay. The ground water table is 3.0 meters below the ground surface. The sand has a unit weight of 14 kN/cu.meter. The clay has a unit weight of 16 kN/cu.meter above the water table and 20 kN/cu.meter below the water table. Determine the total soil stress at the bottom of the clay layer.arrow_forwardThe depth of water in a lake is 4m. the soil at the bottom of the lake consists of sandy clay. the moisture content of the soil was determined to be 25%. the sg of the soil is 2.70. At 5 m depth into the bottom of the lake the void ratio is 0.675, the saturated unit weight is 19.77 kn/m^3. the total stress is 138.1 kpa, the pore water pressure is 88.29 kpa, and the effective stress is 49.81 kPa. Consider problem 8.11 that you just solved. Most designs require taking into account the soil profile up to where Δσ = 0.1*q. For this problem, to what depth must the soil profile be evaluated? This can be solved with circular or rectangular load. Assumptions must be stated. Note: this would be the type of rationale that you would use as an engineer to decide "how deep should our boreholes be for our field exploration program" and "when I made my model / run my calculations, how far down should I run my z-axis below ground surface".arrow_forwardneed fast please A soil profile consists of sand (6-m thick) which overlies a layer of clay (6-m thick). Ground water table is located at the interface of the sand and clay. The effective stress at the bottom of the clay layer was determined. If the water table rises to the top of the ground surface, what is the change in the effective stress (in kPa) at the bottom of the clay layer? For sand layer: Void Ratio = 0.88, Specific gravity = 2.75, Degree of Saturation = 0.79 For clay layer: Void Ratio = 0.99, Specific gravity = 2.86 Round off to two decimal places.arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Fundamentals of Geotechnical Engineering (MindTap...Civil EngineeringISBN:9781305635180Author:Braja M. Das, Nagaratnam SivakuganPublisher:Cengage Learning
Fundamentals of Geotechnical Engineering (MindTap...
Civil Engineering
ISBN:9781305635180
Author:Braja M. Das, Nagaratnam Sivakugan
Publisher:Cengage Learning