Answer Happy

12.8 The filling sequence for a municipal solid waste landfill is listed in Table 12.11. Assume the following: Unit weight of solid waste, Kwaste = 65 lb/ft' (10.2 kN/m"); Original applied pressure on the solid waste, on = 1000 lb/ft (48 kN/m”); Modified primary compression index, C' = 0.28; Modified secondary compression index, Ca' = 0.065; and Secondary settlement starting time, 11 = 1 month. Filling or placement of solid waste stops at the end of the 8th month. Table 12.11 Solid Waste Filling Record for Problem 12.8 Time Period Height of Solid Waste Filled feet meter 1' Month 25 7.5 2nd month 31 9.3 3d month 18 5.4 4th month 0 0 5th month 0 0 6th month 8 2.4 7th month 25 7.5 gth month 27 8.1 (1) Calculate the total settlement of the landfill at the end of the 3rd month. (2) Calculate the total settlement of the landfill at the end of the 5th month. (3) Calculate the total settlement of the landfill at the end of the 8th month (4) Calculate the total settlement of the landfill at the end of the 18th month.