Analytical Chem Soil HW Solutions 46

Analytical Chem Soil HW Solutions 46 - QUESTIONS AND...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
46 QUESTIONS AND SOLUTIONS: CHAPTER 4 Analysis and interpretation of one-dimensional compression test data Q4.1 (a) What factors govern the relevance to a given design situation of the parameters obtained from an oedometer test? (b) Data from an oedometer test are given below. Show that the specific volume v is related to the sample height h by the expression (v/h) = constant. Plot a graph of specific volume v against the natural logarithm of the vertical effective stress, ln σ ' v , and explain its shape. Calculate the values of κ o and λ o . σ ' v , kPa 25 50 100 200 100 50 Equilibrium sample height h, mm (after consolidation has ceased) 19.86 19.56 19.27 18.48 18.79 19.08 Water content of sample at the end of the test ( σ ' v =50kPa, h=19.08mm): 20.88% Grain specific gravity G s = 2.75 (c) Figure 4.40 shows the ground conditions at the site of a proposed new office building. The office building will have a raft foundation, the effect of which will be to increase the vertical effective stress in the clay layer by 50kPa throughout its depth. The oedometer test sample
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.
Ask a homework question - tutors are online