Figure 1. shows a barrier system consisting of a primary leachate collection system, a primary clay liner with a hydraulic conductivity of 10° m/s underlain by a hydraulic control (HC) layer. It is assumed that the HC layer is kept free draining without significant build-up of head in this layer. Therefore, there is no head loss between point B and C. Underneath the HC layer there is 1.5m thick natural clay (secondary clay liner) with hydraulic conductivity of 5 x 10-10 m/s and an aquifer. a) Calculate the total head at A, B & D. b) Calculate the rate of flow per unit area for the secondary liner. c) Calculate the pore water pressure in kPa at point B 1.5 m DATUM 0.2 m Leachate Collection 1.2 m Primary Liner 0.1 m -Hydraulic Control k=0.1 mis 1.5 m Secondary Liner Aquifer Fig 1. Barrier system

Q: Repeat Problem 16.6 with the following:D50 = 3.2 mmD20 = 0.91 mmD10 = 0.72 mm

A: given: D50=3.2 mmD20=0.91 mmD10=0.72 mm

Q: Determine the increase of pore water pressure at M due to the infinite strip loading shown in Figure…

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Q: 4. A normally consolidated clay layer is 3 m thick (one way drainage). From the application of a…

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Q: For a laboratory consolidation test on a clay specimen (drained on both sides), the following…

A: Given:- The thickness of the clay layer = 25 mm Effective overburden pressure at first point (P1) =…

Consolidation parameters

Consolidation is the process of expulsion of pore water present in the voids of soil solids under the pressure of the applied load. This is a quick process in the case of coarse-grained soils since the permeability is high due to the presence of more voids, while it is a slow and gradual process in the case of clayey soil as the permeability of clay is less. An example of consolidation is the settlement of soil under a building due to the load coming from the building.