Soil Stabilization And Soil Exploration – GATE CE Geotechnical EngineeringPractice Questions & PYQs

The inside diameter of a sampler tube is 50 mm. The inside diameter of the cutting edge is kept such that the Inside Clearance Ratio (ICR) is 1.0% to minimize the friction on the sample as the sampler tube enters into the soil. The inside diameter (in mm) of the cutting edge is ________. (round off to two decimal places)

In a soil investigation work at a site, Standard Penetration Test (SPT) was conducted at every 1.5 m interval up to 30 m depth. At 3 m depth, the observed number of hammer blows for three successive 150 mm penetrations were 8, 6 and 9, respectively. The SPT N-value at 3 m depth, is

For the following statements: P: The lateral stress in the soil while being tested in an oedometer is always at-rest. Q: For a perfectly rigid strip footing at deeper depths in a sand deposit, the vertical normal contact stress at the footing edge is greater than that at its centre. R: The corrections for overburden pressure and dilatancy are not applied to measured SPT-N values in case of clay deposits. The correct combination of the statements is

Which of the following statement is TRUE for degree of disturbance of collected soil sample?

The degree of disturbance of the sample collected by the sampler is expressed by a term called the "area ratio". If the outer diameter and inner diameter of the sampler are $D_{o}$ and $D_{i}$ respectively, the area ratio is given by

In the context of collecting undisturbed soil samples of high quality using a spoon sampler, following statements are made : I. Area ratio should be less than 10% II. Clearance ratio should be less than 1% With reference to above statements, which of the following applies ?

Match the List-I (Boring methods) with List-II (Field conditions) and select the correct answer.