37.6.1. Field Tests

Try these first

1. 1.

   What does SPT stand for?

   Hint

   It is a commonly used field test.

2. 2.

   What does the CPT measure?

   Hint

   Consider what happens when you push an object into sand.

3. 3.

   What does SPT measure?

   • Soil cohesion
   • Number of blows to penetrate soil
   • Moisture content

   Hint

   Think about how resistance is measured in this method.

4. 4.

   CPT provides what kind of data profile?

   • Discrete
   • Continuous
   • Both Discrete and Continuous

   Hint

   Consider how data is represented in this method.

5. 5.

   Explain how field tests (SPT, CPT, Vs) could impact the design of a bridge in a seismic zone. Consider various soil conditions and assessments of liquefaction risks.

   Hint

   Reflect on how varying soil conditions can affect structure stability.

6. 6.

   You conduct an SPT and record an N-value of 4 in a layer followed by a CPT indicating low resistance. What recommendations would you make for upcoming construction?

   Hint

   Think about the implications of low resistance on safety measures.