Which of the following parameters affect the time required to reach 80% of primary consolidation settlement after the construction of a building? A.Drainage path B.Preconsolidation pressure C.Compression and re-compression indices D.Soil permeability E.Coefficient of consolidation

A surcharge and sand drain installation is proposed for an airport project to accelerate the consolidation of a thick deposit of fine-grained soil underlying the construction area. The plan is to install sand drains 1.5 ft in diameter at a staggered spacing so that each sand drain will handle a plan area 15 ft in diameter. Laboratory tests indicate that the coefficient of consolidation for horizontal drainage of the soil is 0.5 ft2/day. Computations indicate that the surcharge load will cause an eventual settlement of 12 in. How long a period will be required for 90 percent of this settlement to take place?

An Engineer wants to find how long it will take for clay under their project to consolidate 1 inch. The total expected primary consolidation is 2.22 inches. Using the Table below, what is the value of the Time Factor they will need to calculate the time rate of consolidation they are looking for? (Hint: What percent consolidation are they looking for?) 0.170 0.196 0.126 0.150

What are shear strength result of the consolidated–drained (C–D) shear test?