Geotechnical Engineering Questions and Answers – General Bearing Capacity Equation: Brinch Hansen’s Analysis

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This set of Geotechnical Engineering Question Bank focuses on “General Bearing Capacity Equation: Brinch Hansens Analysis”.

1. For purely cohesive soil, Nc has a maximum value of ___________ for square footing.
a) 5
b) 7.5
c) 9
d) 10
View Answer

Answer: c
Explanation: According to Skempton’s observation, for purely cohesive soil (φ = 0) Nc has a maximum value of 9 for square or circular footing.
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2. The Brinch Hansen shape factor can be applied to ___________ for the case of rectangular footing.
a) Skempton value of Nc
b) Terzaghi’s equation
c) Meyerhof’s equation
d) None of the mentioned
View Answer

Answer: a
Explanation: The Brinch Hansen shape factor can be applied to the Nc values from Skempton for the rectangular footing.

3. Hansen considered the bearing capacity as a ____________
a) Tri axial problem
b) Base factor
c) Plane-strain problem
d) All of the mentioned
View Answer

Answer: c
Explanation: Brinch Hansen considered the bearing capacity as a plane-strain problem. If φ is found by tri axial test, its corresponding value for the plane strain case can be computed.
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4. Bowel suggested that the increase in φ in plane-strain case can be computed only for φ greater than ____________
a) 30
b) 25
c) 60
d) 90
View Answer

Answer: b
Explanation: Bowel suggests that the increase of φ in the equation φ plain strain = 1.1 φ tri axial can be computed only for φ greater than 25°.

5. Skempton observed that the factor Nc increases with the ratio ___________
a) D/B
b) B/D
c) H/Hc
d) c/cm
View Answer

Answer: a
Explanation: Based partly on theory and partly on the laboratory test, Skempton observed that the factor Nc increases with the ratio D/B.
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6. When D=0, the value of Nc for strip footing will be ____________
a) 6.20
b) 2.5
c) 5.14
d) 7.5
View Answer

Answer: a
Explanation: According to Skempton recommendation, the value of Nc = 5.14 for strip footing when D=0 and Nc = 6.20 for square or circular footing.

7. Which of the following value can be taken [Nc] surface for surface footing?
a) 6
b) 5
c) 2.1
d) 9
View Answer

Answer: a
Explanation: Value of [Nc] surface may be roughly taken as 5 for surface strip footing and as 6 for square or circular footing.
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8. The term ‘i’ in Hansen equation represents ___________
a) Depth factor
b) Shape factor
c) Ground factor
d) Inclination factor
View Answer

Answer: d
Explanation: According to Brinch Hansen’s equation, i represent the inclination factor to account for both horizontal and vertical components of foundation loads.

Sanfoundry Global Education & Learning Series – Geotechnical Engineering.

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Manish Bhojasia, a technology veteran with 20+ years @ Cisco & Wipro, is Founder and CTO at Sanfoundry. He is Linux Kernel Developer & SAN Architect and is passionate about competency developments in these areas. He lives in Bangalore and delivers focused training sessions to IT professionals in Linux Kernel, Linux Debugging, Linux Device Drivers, Linux Networking, Linux Storage, Advanced C Programming, SAN Storage Technologies, SCSI Internals & Storage Protocols such as iSCSI & Fiber Channel. Stay connected with him @ LinkedIn | Youtube | Instagram | Facebook | Twitter