Groundworks Wet Soil Mixing Knowledge Quiz

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Quizzes Created: 1 | Total Attempts: 182

Questions: 5 | Attempts: 182 | Updated: Mar 20, 2023

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Groundworks Wet Soil Mixing Knowledge Quiz - Quiz

Welcome to the GroundWORKS quiz for April 2012. This short quiz is intended to help you learn more about ground improvement and special foundations. All of the answers can be easily found on our website. You may direct your browser to www. HaywardBaker. Com or click below.
https://www. Haywardbaker. Com/WhatWeDo/Techniques/GroundImprovement/WetS oilMixing/default. Aspx
This month's quiz is on WET SOIL MIXING. Every quiz returned with all answers correct will be entered for the monthly drawing of a Kindle FIRE tablet. If you do not score 100%, please review the correct answers at the end of the quiz Read moreand try again.

Questions and Answers

1.

Wet soil mixing is only effective in soils with high water content.
- A.
  
  True
- B.
  
  False
Correct Answer
B. False

Explanation
"Wet" soil mixing actually refers to the property of the binder slurry being mixed into the soil. That is, "wet" refers to the grout, not the soil. Wet soil mixing is best suited for maximum moisture contents of about 60%.

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2.

Wet soil mixing creates columns of pure grout with compressive strengths greater than concrete.
- A.
  
  True
- B.
  
  False
Correct Answer
B. False

Explanation
Wet soil mixing creates columns that are a mixture of the existing soil and the introduced grout. Therefore the ultimate strength of the soilcrete will be controlled by the type of soil and the amount of grout introduced. Achievable compressive strengths are on the order of 200 psi for silts and clays; and in excess of 1000 psi for clean sands.

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3.

The cost of wet soil mixing is generally _______ jet grouting.
- A.
  
  More than
- B.
  
  Less than
- C.
  
  The same as
Correct Answer
B. Less than

Explanation
Wet soil mixing is roughly 1/3 the cost of jet grouting. Therefore it is beneficial to consider soil mixing first if project logistics permit and the desired results can be achieved.

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4.

Wet soil mixing has been used to:
- A.
  
  Increase bearing capacity
- B.
  
  Decrease settlement
- C.
  
  Increase global stability
- D.
  
  Mitigate liquefaction potential
- E.
  
  Support excavation
- F.
  
  Stabilize ground for tunnel construction
- G.
  
  All the above
Correct Answer
G. All the above

Explanation
Wet soil mixing creates columns of improved ground using the in-situ soil as the "aggregate" and the grout as the binding agent. The final strength of the column depends on both the existing soil and the amount of grout slurry injected. Analysis of the geometry of the column or composite mass with the improved strength will determine what capacity is available in compression or shear. In certain cases such as excavation support, reinforcement can be added to the columns for bending moment resistance.

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5.

What treatment geometries can wet soil mixing provide?
- A.
  
  Single circular columns
- B.
  
  Multiple column groups
- C.
  
  Deep,long,linear homogeneous profile walls
- D.
  
  Large shallow blocks
- E.
  
  All the above
Correct Answer
E. All the above

Explanation

Single Axis Mixing Mass Mixing Method TRD - deep trench mixer

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Groundworks Wet Soil Mixing Knowledge Quiz

Wet soil mixing is only effective in soils with high water content.

Wet soil mixing creates columns of pure grout with compressive strengths greater than concrete.

The cost of wet soil mixing is generally _______ jet grouting.

Wet soil mixing has been used to:

What treatment geometries can wet soil mixing provide?