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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Chapter 4, Problem 4.8QPP
To determine
The type of soil and significance of the peak in the graph at the depth of
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12. You are given the following results from Atterberg Limits
testing on a soil sample (PL = 23%, LL = 50%) collected
from a boring on a local project site. If the soil is fine
grained, what is its classification according to USCS?
Q-C
Refer to the soil profile shown in Fig. Q-c (page 2). Calculate and plot o, u and o' with
depth.
Q2.
(a)
You are given the following results from Atterberg Limits testing on a soil
sample (PL= 23%, LL = 55%) collected from a boring on a local project site.
The soil sample had natural moisture content of 56.3% prior to Atterberg
Limits testing. If the soil is fine grained, what is the USCS Group Symbol
(refer to Figure 2a) on page 7 for this soil and what does the natural moisture
content result tell you about the soil in-situ (i.e. “in place")?
Chapter 4 Solutions
Foundation Design: Principles and Practices (3rd Edition)
Ch. 4 - Describe a scenario that would require a very...Ch. 4 - How would you go about determining the location of...Ch. 4 - A five-story office building is to be built on a...Ch. 4 - A two-story reinforced concrete building is to be...Ch. 4 - Discuss the advantages of the CPT over the...Ch. 4 - A standard penetration test was performed in a 150...Ch. 4 - Using the CPT data in Figure 4.22, a unit weight...Ch. 4 - Prob. 4.8QPPCh. 4 - Prob. 4.9QPPCh. 4 - A series of vane shear tests have been performed...
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- what is the relationship between soil particle size and porosity? Answer in a complete sentarrow_forwardTrue or False? If I am assigned to sample soil for testing, I need to collect samples always at two different depthsarrow_forward-In this site, SPT test has been used to calculate the properties of soil layers. Mention two other methods that could be used to calculate soil properties and explore two advantages for each method.arrow_forward
- Define the Soil Modulus from Cone Penetration Test (modified from Mitchell and Gardner 1975) ?arrow_forwardA saturated 200 cm³ clay sample has a natural water content of 35%, shrinkage limit (SL) of 12%, and specific gravity of soil solids (Gs) of 2.70. Combining your knowledge gained form the first and second homework assignments, determine the volume of the sample when the water content is 5%.arrow_forwardDescribe why effective stress is important when evaluating soil behavior. Please provide at least one example.arrow_forward
- A thin-walled sampling tube must be fabricated to obtaingood-quality undisturbed clay samples of 75 mm diameter.What is the maximum possible wall thickness?arrow_forwardFor a given soil, show thatarrow_forwardDefine what is Saturated Surface Dry. How does one know when the SSD has been reached in a sand sample?arrow_forward
- You are given the results of index testing (i.e., Atterberg Limits; ASTM D422 and D4318) of two soil samples collected during a recent geotechnical exploration. The index test results are presented in Figure B. The first sample was taken between depths of 1.5 ft to 2.5 ft below the existing ground surface. The second sample was taken between depths of 6.5 ft to 7.5 ft below the existing ground surface. The groundwater table, at the time of the geotechnical exploration, was at a depth of 4.0 ft from the existing ground surface. Classify the soil of one sample only (either Sample #1 or Sample #2) in accordance with USCS (give group symbol and group name). #30 #40 60 #100 #200 100 Sample #1 - Depth Range 1.5 ft to 2.5 t Sample #2 - Depth Range 6.5 ft to 7.5 t Line/Scatter Plot 13 06 80 Atterberg Limits Results: Sample #1: LL = 34, PL 21 Sample #2. LL = 70, PL = 50 60 30 20 10 60100 200 0.1 D=0.085 mm Particle Diameter (mm) #10 10 0.01 0.001 D-0 82 mm Dy=0.395 mm Figure B. Grain Size…arrow_forwardExamine the data from the following soils. Tell me what you think may be the reason for the soil bulk densities varying as they do. Do you think you could suggest a Soil Order associated with each?arrow_forwardDescribe why effective stress is important when evaluating soil behavior. Please provide at least one example. (2-3 Sentences)arrow_forward
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