Answered: For the soil profile shown, calculate…

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Show solution. The answer must be 0.134m

Transcribed Image Text:For the soil profile shown, calculate the settlement on the clay layer due to primary consolidation if the footing carries a net pressure equal 200 kN/m² on its bottom. A sample of the clay was subjected to Atterberg Limit tests and yielded a water content of 39.706% at 25 blows in the liquid limit device. (0.134 m) 2 m X 3 m footing 2.0 m 200 KN/m2 SAND 2.1 m e-0.52 2.0 m GWT ..Z..G.?65. 0.8 m CLAY Cs = 1/6 Cc e= 0.9 4.0 m Gs-2.74 Pc 115 kPa IMMEDIATE SETTLEMENT pB 1-u²1, E Eq. 24 Si %3D where: Si = immediate settlement p = net pressure applied B = width of the foundation (diameter of a circular footing) p = Poisson's ratio E = Modulus of Elasticity of soil Ip = non dimensional influence factor Table 2. Influence Factors for foundations Flexible Shape Center Corner Rigid Circle 1.00 064 0,29 0.88 107 1.21 Rectangle 1.12 136 0.56 0.68 0.77 O.89 1.5 10 20 50 100 1.53 1.78 210 2.54 299 3.57 4.01 105 1.27 1.49 18 20 142 1.20 2.10 246 3.0 3.43 m, = length/width of foundation TOTAL FOUNDATION SETTLEMENT ST = S + Ss + Si→ Eq. 25

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