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Posted: **Sun Jul 10, 2022 11:44 am**

: B A Close Ended Precast Concrete Pile With Diameter Of 350 Mm Is To Be Driven Into Deposits Of Cohesive Soil To Support 1 (12.44 KiB) Viewed 59 times

: B A Close Ended Precast Concrete Pile With Diameter Of 350 Mm Is To Be Driven Into Deposits Of Cohesive Soil To Support 2 (9.95 KiB) Viewed 59 times

b) A close-ended precast concrete pile with diameter of 350 mm is to be driven into deposits of cohesive soil to support part of an industrial building. The soil profile is given in Figure Q3(b) and the ground water table is situated at the ground surface. Estimate the length of pile required to support an allowable compression load of 400 kN with an overall factor of safety of 3.0 if the top clay layer consolidates and settles. (15 marks)
4 m 6 m ? m Soft CLAY Your = 18.5 kN/m² c=25 kN/m² a 1.0 Stiff silty CLAY You 19 kN/m² c₂=75 kN/m² a=0.6 Very thick and very stiff sandy CLAY 7-20 kN/m² cu = 130 kN/m² a=0.55 FIGURE Q3(b)