Peter K. Robertson
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    • Robertson’s Remarks
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Robertson’s Remarks

 How accurate is the CPT?
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By vkolorizos
In Robertson's Remarks
Posted December 1, 2011

How accurate is the CPT?

Occasionally I am asked “How accurate is the CPT?” In short – generally it’s more accurate than most other in-situ and laboratory tests for a […]

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 Estimating Soil Permeability from CPT
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By vkolorizos
In Robertson's Remarks
Posted May 1, 2009

Estimating Soil Permeability from CPT

Lunne et al (1997) suggested an approximate method to estimate soil permeability (hydraulic conductivity) from the CPT via the Soil Behavior Type (SBT) chart using […]

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 Shear Wave Velocity, Vs, from CPT
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By vkolorizos
In Robertson's Remarks
Posted January 1, 2009

Shear Wave Velocity, Vs, from CPT

The shear wave velocity (Vs) is a very useful parameter since it links directly to the small strain shear stiffness of the soil (G0). Although […]

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 Settlement calculations using CPT data
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By vkolorizos
In Robertson's Remarks
Posted September 1, 2008

Settlement calculations using CPT data

Traditionally the CPT has not been used extensively for the calculation of vertical settlements due to foundations loads. Partly this has been due to the […]

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 Evaluation of Cyclic Softening in Clays
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By vkolorizos
In Robertson's Remarks
Posted May 1, 2008

Evaluation of Cyclic Softening in Clays

Boulanger and Idriss (2007, ASCE) recently presented an excellent summary for the evaluation of the cyclic softening in silts and clays. They correctly suggest that […]

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 Transition Zones in CPT Data
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By vkolorizos
In Robertson's Remarks
Posted January 1, 2008

Transition Zones in CPT Data

A challenge when using CPT data for liquefaction evaluation is that the CPT data are collected at very close intervals, typically ever 5cm (2 inches), […]

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 Shearwave Velocity for Settlement Calculations
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By vkolorizos
In Robertson's Remarks
Posted June 1, 2007

Shearwave Velocity for Settlement Calculations

In this ‘Remarks’, I would like to discuss the application of shear wave velocity for settlement calculations. A major advantage of the seismic Cone Penetration […]

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 Myths of the CPT: Its too expensive
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By vkolorizos
In Robertson's Remarks
Posted August 1, 2006

Myths of the CPT: Its too expensive

Welcome to Robertson’s Remarks! The previous ‘Robertson’s Remarks’ covered a pet peeve of mine, that engineers/geologist often state: “The disadvantage of the CPT is that […]

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 Myths of the CPT: It doesn’t collect soil samples
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By vkolorizos
In Robertson's Remarks
Posted May 1, 2006

Myths of the CPT: It doesn’t collect soil samples

Welcome to Robertson’s Remarks! My name is Peter Robertson and many of you may know me as an academic/researcher (c/o University of British Columbia then […]

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Contact me

Direct Contact Information

I am currently residing in Southern California and can be reached via email.

Feel free to e-mail me with any questions about CPT or consulting projects at: probertson2005@icloud.com

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Tel: 714-330-9518

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Copyright © 2018 – Peter K. Robertson

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