CEE
CEE380_HW11_S16(1)

CEE380_HW11_S16(1) - UNIVERSITY OF ILLINOIS AT...

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UNIVERSITY OF ILLINOIS AT URBANA-CHAMPAIGN NAME: ________________ DEPARTMENT OF CIVIL & ENVIRONMENTAL ENGINEERING DATE: _____ TEAM: _____ 1 CEE 380 - Spring 2016 HW #11 PV Drains, Stress Distribution, and Mohr’s Circle Due Apr 15, 2016 NOTE: PLEASE SHOW YOUR CALCULATIONS IN A CLEAR FORM REMEMBER TO INCLUDE UNITS IN YOUR CALCULATIONS ** For this assignment, please draw all Mohr circles on engineering/grid paper using a straight edge/ruler and a compass . Clearly label all axes and axis increments. 1. A 6 m thick gravel wide fill (γ=20 kN/m 3 ) is to be placed over a soil profile consisting of 18 m of normally consolidated clay over a silty clay. The water table is at the ground surface (top of gray clay layer). In order to speed up the consolidation of the thick gray plastic clay layer, prefabricated vertical drains are installed in the gray clay layer. They are installed in a triangular pattern such that the drainage distance for each drain is 2m. The properties of the gray clay layer are: γ=16 kN/m 3 , e 0 = 1.7, C c = 0.94, C α / C c = 0.04, c v = 3x10 -3 m 2 /day, c h = 9x10 -3 m 2 /day (note: c h

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