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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Concept explainers

Sediment transport

Sediment transport or Soil transport is the movement of solid particles, usually due to the combination of gravitational forces acting on the sediment, and the movement of the liquid at which the sediment enters. Soil erosion occurs in natural systems where the particles are sandstones (sand, rocks), mud, or clay; the liquid is air, water, or ice; and the gravitational force that works to move particles to the landing surface. Sediment transportation or soil migration due to the movement of liquids occurs in rivers, lakes, lakes, oceans, and other bodies of water as a result of currents and waves. Transportation is also caused by glaciers as they flow, and to places on earth under the influence of wind. Soil erosion due to gravity alone is possible in most sloping areas, including hills, scarves, cliffs, and the continental shelf — the continental boundary of the slope.

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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