Principles of Geotechnical Engineering (MindTap Course List)
9th Edition
ISBN: 9781305970939
Author: Braja M. Das, Khaled Sobhan
Publisher: Cengage Learning
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Textbook Question
Chapter 4, Problem 4.5P
The following data were obtained by conducting liquid limit and plastic limit tests on a soil collected from the site.
Liquid limit tests:
Plastic limit test: PL = 19.3%
a. Draw the flow curve and determine the liquid limit.
b. Using the Casagrande plasticity chart (Figure 4.21), determine the soil type.
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The L6 x 4 x 1/2 single angle shown has two rows of bolts. Each leg has one row (one line) of 5/8 in bolts in each leg as shown. Determine the net area (An). If needed, I attached the section properties from AISC manual for L6x4x1/2.
3. Determine the reactions at the supports for the frame shown in following.
36.5 kN/m
14.6 kN/m
Hinge
R = 10 m
10 m
-10 m
#
4
F3
Existing Flocculation Basin Design Parameters at 22.5 MGD:
A) # of Basins: 5
B) # of Stages per Basin: 2
c) Basin Dimensions: (30 ft. X 4 ft. X 15 ft.)
D) Volume per Basin 10,800 cf (80,787 Gal)
E) Total Flocculation Volume: 54,000 cf (406,920 Gal)
F) Theoretical Unit Detention Time: 25.9 minutes
G) Flow through Velocity (Q): 1.16 ft/min
Deliverables:
1) Determine if the existing flocculation basins are sufficient to accommodate the
projected future capacity.
A) Current Capacity: 22.5 MGD
B) Future Capacity: 34.5 MGD for 110,000 residents
C) If not, determine the number of additional flocculation basins needed to
accommodate the future capacity of 34.5 MGD.
a) Ignore this bullet point
2) Specify the basic dimensions (length, width, water height, weir dimensions, etc.)
of these additional flocculation basins.
3) Specify the design flow rate, detention time, and the flow-through velocity for
each basin under the maximum future capacity of 34.5 MGD, assuming one of
the basins is…
Chapter 4 Solutions
Principles of Geotechnical Engineering (MindTap Course List)
Ch. 4 - During Atterberg limit tests in the soil mechanics...Ch. 4 - Prob. 4.2PCh. 4 - Prob. 4.3PCh. 4 - Results from a liquid limit test conducted on a...Ch. 4 - The following data were obtained by conducting...Ch. 4 - Refer to the soil in Problem 4.5. Using the...Ch. 4 - Following results are obtained for a liquid limit...Ch. 4 - Prob. 4.8PCh. 4 - Prob. 4.9PCh. 4 - Prob. 4.10P
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