assignment6

assignment6 - CM3400: Assignment No. 6 Soil: 1. A...

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CM3400: Assignment No. 6 Soil: 1. A three-story, 80m wide x 100m long residential building is to be built on a site underlain by silty clay. This soil has probably poor engineering properties and average uniformity. There is no indication of previous fill or grading at the site, and the groundwater table is believed to be 30m below the ground surface. We anticipate supporting the building on spread footing foundations located 1.7m below the surface. There are no accessibility problems at the site. a. How many exploratory borings will be required and to what depth? 100x80=8000/300 = 27 borings For poor soil, 6S .7 + D = 6 (3 .7 ) + 1.7 = 5.205 m depth b. What type of drilling equipment and sampler would you recommend for this project? Hollow stem auger and Shelby tube 2. Explain the operation of the standard penetration test and the cone penetration test. Discuss the advantages and disadvantages of each method. Standard penetration test – a 140 lb hammer is used and given 30 inches of free fall over 18 inches of earth. Record the number of blows per every 6 inch penetration, SPT blow
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This note was uploaded on 06/22/2009 for the course CM 3400 taught by Professor Hassan during the Spring '09 term at LSU.

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assignment6 - CM3400: Assignment No. 6 Soil: 1. A...

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