The figure above is the plan of a rectangular raft foundation carrying a uniformly distributed load. The raft is symmetr

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The Figure Above Is The Plan Of A Rectangular Raft Foundation Carrying A Uniformly Distributed Load The Raft Is Symmetr 1 (74.49 KiB) Viewed 26 times

The figure above is the plan of a rectangular raft foundation carrying a uniformly distributed load. The raft is symmetrical about lines CD and CB. When computing the incremental vertical stress at 2 m below point A, what values of "L" and "b" should be used in the following expression: Ao₂ = 2 [tan¯¹ ( 10₂ ) + b² (2+2)] . N . NOTE the expression Lbz R₂ 27 zR3 should give the final stress value at point A, therefore evaluating the validity of the expression is part of the question. O L=2 m; b = 3 m O L=1.5 m; b=1m O L=1 m; b= 1.5 m OL-3 m; b=1m 1 m 1.5 m O None of these or the expression is incorrect