Figure 1 shows a square footing (15'x15') located on top of a silty sand soil deposit. The design axial load on this foo

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Figure 1 Shows A Square Footing 15 X15 Located On Top Of A Silty Sand Soil Deposit The Design Axial Load On This Foo 1 (48.3 KiB) Viewed 9 times

Figure 1 shows a square footing (15'x15') located on top of a silty sand soil deposit. The design axial load on this footing is 250 tons. The SPT data (N60 and N'60) is presented in a table, which is measured at three boreholes near the silty sand site. Determine the settlement of this footing using the following three in-situ (SPT) based methods. 1) Burland and Burbidge's Method 2) D'Appolonia's Method 3) Schultze and Sherif's Method If the allowable settlement is 1.5 inch, state whether this foundation needs to be redesigned or not. Comment on the redesign based on your engineering judgement. MALERE 15" T-115 pcf -0.0575 to man Sand Note: The firm stratum is encountered at depth 45 t below the foundation level. Depth (1) 6 9 12 15 18 24 27 Z Figure 1 N N' 17 12 ======= 18 Boring 1 16 16 21 15 15 16 ======= 12 18 SZ 8 N 17 9 15 15 16 16 16 16 15 8 9 15 222= Boring 2 z 9 12 a 15 9 N 16 13 13 11 11 11 89 35 35 9 26 24 11 20 Boring 3 20 16 16 26 26 26 20 17 20 24 22