GATE 2022 CE (CE1) – Question 33

Geotechnical Engineering · Sub-surface investigations: boring, SPT, CPT, plate load test · 1 mark · Numerical answer

At a site, Static Cone Penetration Test was carried out. The measured point (tip) resistance qc was 1000 kPa at a certain depth. The friction ratio (fr) was estimated as 1 % at the same depth. The value of sleeve (side) friction (in kPa) at that depth was ___________________ . (in integer)

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Correct answer: 10

Explanation

Cone friction ratio is $f_r=100f_s/q_c$, with both stresses in consistent units.

Therefore $f_s=(1/100)(1000)=\mathbf{10}$ kPa. The percentage must be converted to the fraction 0.01.