HW 06_CEE 4405-2

Georgia Institute of Technology CEE 4405-B Homework #6 Geotechnical Engineering Page 1 of 3 School of Civil and Environmental Engineering Assigned: 1 0 / 30 /202 3 Due: 11/ 10 /202 3 - 11 : 59 pm 1. A highway embankment is being constructed over a deposit of clay that is interlayered with sand. The embankment will have a height of 2.5 m and the fill used to construct the embankment has a unit weight of . Given the soil profile and properties below, determine the amount of primary consolidation that will occur under the centerline once the embankment is constructed. Assume the water table is at the ground surface. Soil Unit Weight (kN/m 3 ) e o C c C r (kN/m 2 ) Fill 16 0.67 -- -- -- Clay 1 13 0.7 0.7 0.05 35 Sand 1 14.5 1.0 -- -- -- Clay 2 14 0.8 0.4 0.04 55 Sand 2 14.5 1.0 -- -- -- 2 m 1 m 4 m 1 m 2.5 m

Georgia Institute of Technology CEE 4405-B Homework #6 Geotechnical Engineering Page 2 of 3 School of Civil and Environmental Engineering Assigned: 10/30/2023 Due: 11/10/2023 - 11:59 pm 2. Given the subsurface conditions shown below. If a 10-meter-thick fill ( ) of large lateral extent is placed on the surface of this deposit, calculate the ultimate consolidation settlement of the clay. Assume all settlement occurs in the clay. Soil Unit Weight (kN/m 3 ) e o C c C r (kN/m 2 ) Fill 18 -- -- -- -- Sand 16 -- -- -- -- Clay 15 0.9 0.3 0.02 189 Please remember The following formats are REQUIRED for all homework assignments. Homework that does not follow these requirements will be returned with no credit. 1. Homework must be neat, legible, and organized. Be certain to place your name, the assignment number, and the date on all homework that is handed in. 2. ALL GRAPHS MUST BE COMPUTER GENERATED. Hand drawn graphs will not be graded. Be careful to use scatter plots and not line graphs in order to obtain properly scaled axes. 3. Experimental data should be plotted as discrete points, while theoretical relationships should be shown as continuous lines. 4. SHOW ALL UNITS. Be certain to track units throughout the assignment and include them in the final answer. Credit will be taken off for not including units. 5. One to three significant decimals are normally sufficient in geotechnical engineering. Due to the variability of naturally occurring materials, we cannot calculate properties like settlement to ten decimal places, so do not report it to such precision. 10 m 3 m 2 m