Foundation Design: Principles and Practices (3rd Edition)
3rd Edition
ISBN: 9780133411898
Author: Donald P. Coduto, William A. Kitch, Man-chu Ronald Yeung
Publisher: PEARSON
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Textbook Question
Chapter 3, Problem 3.12QPP
Estimate the effective friction angle of the following soils:
- Silty sand with a dry unit weight of
- Poorly-graded gravel with a relative density of 70 percent.
- Very dense well-graded sand.
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Classify: A sample of well-graded gravel with sand has 73% fine to coarse sub-angular gravel, 23% fine to coarse sub-angular sand, and 4% fines. The maximum size of the particles is 75 mm. The coefficient of curvature is 2.7, while the uniformity coefficient is 12.4.
Estimate the effective friction angle of the following soils:a. Silty sand with a dry unit weight of 110 lb/ft3.b. Poorly-graded gravel with a relative density of 70 percent.c. Very dense well-graded sand.
. Determine the relative density of the sand in the field.
Chapter 3 Solutions
Foundation Design: Principles and Practices (3rd Edition)
Ch. 3 - Explain the difference between moisture content...Ch. 3 - A certain saturated sand has a moisture content...Ch. 3 - Consider a soil that is being placed as a fill and...Ch. 3 - A sample of soil has a volume of and a weight of...Ch. 3 - A site is underlain by a soil that has a unit...Ch. 3 - The sub-surface profile at a certain site is shown...Ch. 3 - A vertical load of 300 kN is applied to a area at...Ch. 3 - A vertical load of 20 k is applied to a area at...Ch. 3 - 3m3m footing is to be built on the surface of a 15...Ch. 3 - A 3 ft square footing carries a sustained load of...
Ch. 3 - A 2m thick fill is to be placed on the soil shown...Ch. 3 - Estimate the effective friction angle of the...Ch. 3 - Explain the difference between the drained...Ch. 3 - A soil has c=5 kPa and =32. The effective stress...Ch. 3 - A footing with an embedment of 2 m is embedded in...Ch. 3 - Prob. 3.16QPPCh. 3 - Prob. 3.17QPPCh. 3 - A 9 ft thick fill is to be placed on the soil...
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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
- An isolated footing 1.50m x 1.20m x 0.30m designated as F-1, is to be used as foundation for two storey residence. There are nine (9) pcs of F-1. Using Class A 1:2:4 Concrete Mix Proportion, a) determine the required total quantity of cement - 40kg bag.arrow_forwardA soil that contains only sizes between 0.1 and 1 mm can be classified as uniform sand Select one: O True O Falsearrow_forwardFigure H7-1 shows a soil profile consisting of a clay layer underlain by layer of dense sand. Above the clay layer is a layer of sand. For the portion of the upper sand layer above the groundwater table, the moisture content (w) is 18%, the degree of saturation (S) is 80%, and the specific gravity of solids (Gs) is 2.68. Below the groundwater table, the moisture content is 20%. For the clay layer the moisture content is 40% and the specific gravity of solids is 2.70. Determine the effective stress at the clay dense-sand interface (Point A) prior to excavation. Assuming that, following the excavation, the water remains at the elevation of the groundwater table shown in the Figure, Repeat part (a) immediately after the excavation is complete. Determine the depth of water that can be pumped away (i.e., d) without causing “quick” condition t point A.arrow_forward
- A soil layer consists of 4 meters upper dry sand with a void ratio of 0.45 and a specific gravity of 2.70. The lower 3 meters is clay having a void ratio of 0.9 and a specific gravity of 2.75. The ground water table is 4 meters below ground surface. Compute a) effective stress at 4 meters below ground surfaceb) effectivestress at the bottom of the clay layer c) effective stress at 6 meters below ground surface.arrow_forwardCalculate % Sand using the following values; a. Weight of soil= 50 gb. HR reading at 40 sec.= 25c. Temp at 40 sec= 25 oCd. HR at 2 hrs= 16e. Temp at 2 hrs= 26 oCarrow_forwardIn AASHTO, which group are the following soil likely to fail into? a. A well-graded gravel with approximately 10% fines b. A well-graded sand with approximately 10% fines c. A uniform fine sand d. A high plastic clayarrow_forward
- Calculate % Clay using the following values; a. Weight of soil= 50 g b. HR reading at 40 sec.= 25 c. Temp at 40 sec= 25 oC d. HR at 2 hrs= 16 e. Temp at 2 hrs= 26arrow_forwardA soil mass consists of 40% gravel, 50% sand, and 10% silt. Determine the coefficient of uniformity. Also, classify the soil based on the calculated value of coefficient of uniformity.arrow_forwardThese equations can be applied for dry soil, except: a) Sre = wGs b) Gspw /1+ e c) Ms / V d) Pp/1 + warrow_forward
- Refer to Problem 3.4. Using Eq. (3.28), determine the average relative density of the sand. Assume it is a fine sand. Use Eq. (3.13) to obtain (N1)60.arrow_forwardDetermine the relative density of a cohesionless soil having void ratio 0.5. The void ratio of the soil in the loosest and most dense state is 0.75 and 0.45 respectively.arrow_forwardyd (Gs/1+ e) yw 2. Determining soil characteristics using the three-phase principle, the moisture content of a specimen of soil is 26 percent, and the bulk density is 116 gm/m. if the specific gravity of the particles is 2.76, determine the void ratio and the degree of saturation.arrow_forward
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