Practice Log – Time Curve Fitting Method (2) - Determination of coefficient of consolidation (Cv) from laboratory data

Practice: Log – time curve fitting method

Lesson 2Determination of coefficient of consolidation (Cv) from laboratory data

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8 questions

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2 cards from this section. Quick, good the night before a test.
Exercise
6 questions · about 4 min · pass mark 70%. Hints available.
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2 questions · about 1 min · pass mark 70%. Hints available.
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6 sample questions

Question 1.
What is the first step in the Log-time curve fitting method?
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Think about how we visualize the data.
Question 2.
Why do we select two points, P and Q, with t2 = 4t1?
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Consider how ratios help in mathematical analysis.
3Question 3.
What is the main purpose of the Log-time curve fitting method?
- To determine soil density
- To analyze soil consolidation
- To assess soil friction
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Think about what we are measuring in consolidation tests.
4Question 4.
Is the following statement true or false: The Log-time curve fitting method uses a linear scale for time.
- True
- False
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Recall what type of scale we use to plot the data.
Question 5.
You have dial readings of 3mm at t1 and 12mm at t2 (with t2 = 4t1). How would you plot this data, and what does the reading at point R tell you?
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Remember to graph on a log scale for clarity.
Question 6.
Given a consolidation curve with the primary line ending at dial reading 6mm and the secondary line intersecting at 9mm, what does this signify?
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Connect the relevance of the readings to the definition of consolidation stages.

4 more questions in this section. Enroll free to practise them all.