Assignment 1 Due date 11th April 2011 Weighting 14% (fu

Assignment 1 Due date 11th April 2011 Weighting 14% (full marks is 14) Question 1. [7 marks] A sieve analysis of a soil produced the following results: AS Sieve Size 63mm 19mm 6.7mm 2.3mm 600?m 212?m 75?m % passing sieve 100% 58% 33% 19% 9% 4% 0% ? Plot the particle size distribution curve for the soil. ? Determine whether the soil is well graded or poorly graded. ? Give the soil a Group Symbol and describe the soil using USCS. Question 2. [7 marks] A flow net for flow around a single row of sheet piles in a permeable soil layer is shown as below. Given that k ? 5?10?3 cm sec determine ? How high (above the ground surface) the water will rise if piezometers are placed at points a b c and d . ? The rate of seepage through flow channel II per unit length (perpendicular to the section shown). 5m 1.4m 10m
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