A bridge column carries a downward factored ultimate load of 310 kN and a service load of 200 kN. It is underlain by a lightly overconsolidated clay (OCR = 2) with the following engin-eering properties: su = 250 kPa, Cc = 0.20, Cr = 0.05, e = 0.7, and g = 15.0 kN/m3 above the groundwater table and 16.0 kN/m3 below. The groundwater table is at a depth of 1.0 mbelow the ground surface. Using LRFD, determine the design footing width clearly identifyingwhether it is controlled by settlement or bearing capacity.
A bridge column carries a downward factored ultimate load of 310 kN and a service load of 200 kN. It is underlain by a lightly overconsolidated clay (OCR = 2) with the following engin-eering properties: su = 250 kPa, Cc = 0.20, Cr = 0.05, e = 0.7, and g = 15.0 kN/m3 above the groundwater table and 16.0 kN/m3 below. The groundwater table is at a depth of 1.0 mbelow the ground surface. Using LRFD, determine the design footing width clearly identifyingwhether it is controlled by settlement or bearing capacity.
Principles of Foundation Engineering (MindTap Course List)
8th Edition
ISBN:9781305081550
Author:Braja M. Das
Publisher:Braja M. Das
Chapter16: Soil Improvement And Ground Modification
Section: Chapter Questions
Problem 16.9P
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Question
A bridge column carries a downward factored ultimate load of 310 kN and a service load of
200 kN. It is underlain by a lightly overconsolidated clay (OCR = 2) with the following engin-
eering properties: su = 250 kPa, Cc = 0.20, Cr = 0.05, e = 0.7, and g = 15.0 kN/m3
above
the groundwater table and 16.0 kN/m3
below. The groundwater table is at a depth of 1.0 m
below the ground surface. Using LRFD, determine the design footing width clearly identifying
whether it is controlled by settlement or bearing capacity.
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