Geotech Week 8b Quiz

Chronologically, which order do the following settlement types happen?

• 1. 1. Elastic
     2. Consolidation
     3. Creep

• 1. 1. Elastic
     2. Plate-based
     3. Varying Density

• 1.Elastic
  2. Inelastic
  3. Plastic

• 1.Immediate
  2. Delayed
  3. Rebound

What are the most important types of settlement for each type of soil?

• Sand - elastic
  Clay - consolidation

• Sand - consolidation
  Clay - elastic

• Sand - time dependant
  Clay - immediate

• Sand - friction
  Clay - cohesion

For this strip footing, which values concerning elastic settlement are true?

• D = 2m
  B = 5m
  H = 4m

• B = 5m

  D = 6m

  d = 2m

• H = 4m

  d = 4m

  B = 2m

• D = 2m

  d = 0m

  H = 6m

What is the point of a plate loading test (PLT)?

• A plate is a smaller footing which can be used as a small-scale shallow foundation

• A plate is loaded near the footing to determine soil properties such as elastic modulus

• A plate is loaded to pre-consolidate the soil around the footing so it settles into place faster

• A plate helps to determine the geometric properties of the footing such as area and moment of inertia

The 1D-Consolidation method requires what steps

• Step 1 - stresses

  Step 2 - change in void ratio

  Step 3 - final consolidation settlement

• Step 1 - stresses
  
  Step 2 - consolidation over time

  Step 3 - final creep settlement

• Step 1 - stresses

  Step 2 - find footing area

  Step 3 - find the P_allowable

• Step 1 - stresses

  Step 2 - find the elastic modulus

  Step 3 - find S_average

Which stress formulas are matched correctly to the footing types?

(Tick ALL OPTIONS that apply)

• Strip - uniform strip load

• Strip - uniform line load

• Individual footing - point load (Boussinesq Eqn)

• Individual footing - rectangular area load (Fadum's chart)