Circular precast concrete piles with 60 cm in diameter will be driven to a tip penetration of 30 m. The soil profile is all clay and the water table is 2 m under the ground surface. Consider that the soils with cu< 60 kPa can be considered soft for this case. The unit weight of water is 10 kN/m³. Unconfined compression tests on samples taken from a thin-walled Shelby tubes were performed, and the soil profile has the following stratification: a. b. 0-5 m 5-15 m 15-80 m. a. b. C. Cu= 20 kPa Cu= 40 kPa Cu= 200 kPa State any necessary assumptions. Show a summary table comparing the different capacities and discuss reasons for differences. 7-16.5 kN/m³ Y17.5 kN/m³ Y=20.5 kN/m³ Tomlinson's 1957 a method (alpha method #1) Tomlinson's 1971 a method (alpha method #2) Original A method (lambda method #1) Revised A method based on pile length (lambda method #2) API method (Randolph and Murphy 1985)
Circular precast concrete piles with 60 cm in diameter will be driven to a tip penetration of 30 m. The soil profile is all clay and the water table is 2 m under the ground surface. Consider that the soils with cu< 60 kPa can be considered soft for this case. The unit weight of water is 10 kN/m³. Unconfined compression tests on samples taken from a thin-walled Shelby tubes were performed, and the soil profile has the following stratification: a. b. 0-5 m 5-15 m 15-80 m. a. b. C. Cu= 20 kPa Cu= 40 kPa Cu= 200 kPa State any necessary assumptions. Show a summary table comparing the different capacities and discuss reasons for differences. 7-16.5 kN/m³ Y17.5 kN/m³ Y=20.5 kN/m³ Tomlinson's 1957 a method (alpha method #1) Tomlinson's 1971 a method (alpha method #2) Original A method (lambda method #1) Revised A method based on pile length (lambda method #2) API method (Randolph and Murphy 1985)
Principles of Geotechnical Engineering (MindTap Course List)
9th Edition
ISBN:9781305970939
Author:Braja M. Das, Khaled Sobhan
Publisher:Braja M. Das, Khaled Sobhan
Chapter11: Compressibility Of Soil
Section: Chapter Questions
Problem 11.4P
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Transcribed Image Text:Circular precast concrete piles with 60 cm in diameter will be driven to a tip penetration
of 30 m. The soil profile is all clay and the water table is 2 m under the ground surface.
Consider that the soils with cu< 60 kPa can be considered soft for this case. The unit
weight of water is 10 kN/m³. Unconfined compression tests on samples taken from a
thin-walled Shelby tubes were performed, and the soil profile has the following
stratification:
a.
b.
0-5 m
5-15 m
15-80 m
a.
b.
C.
Cu= 20 kPa
Cu= 40 kPa
Cu 200 kPa
State any necessary assumptions. Show a summary table comparing the different
capacities and discuss reasons for differences.
Yt=16.5 kN/m³
Y-17.5 kN/m³
Y=20.5 kN/m³
Tomlinson's 1957 a method (alpha method #1)
Tomlinson's 1971 a method (alpha method #2)
Original A method (lambda method #1)
Revised A method based on pile length (lambda method #2)
API method (Randolph and Murphy 1985)
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