As shown in Figure 1, a sheet pile has been driven 5m into saturated sand layer...

 

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As shown in Figure 1, a sheet pile has been driven 5m into saturated sand layer to retain 7 m of backfill. The backfill consists of two layers: 4 m of coarse sand and 3 m of silty clay. A surcharge pressure of 100 kPa was applied to backfill to pre-consolidate the silty clay layer. The total active lateral pressure at 12 m depth is: (Assume Rankine conditions are satisfied) Sheet pile Wall 4 m Sm 3 m Figure 1 q=100kN/m² Coarse Sand 7-20kN/m² c'²=0 @-30⁰ Sity clay soil 7-18kN/m² #-15° e²-30 kPa Sand 7=22 kN/m² c'=0 ¹-27⁰ Rankine's Active earth pressure x=K₂0¹₂-20¹√√K X/A sind 1+sin- Rankine's Passive earth pressure xip=Ko'z+2√√K₂ sind sin As shown in Figure 1, a sheet pile has been driven 5m into saturated sand layer to retain 7 m of backfill. The backfill consists of two layers: 4 m of coarse sand and 3 m of silty clay. A surcharge pressure of 100 kPa was applied to backfill to pre-consolidate the silty clay layer. The total active lateral pressure at 12 m depth is: (Assume Rankine conditions are satisfied) Sheet pile Wall 4 m Sm 3 m Figure 1 q=100kN/m² Coarse Sand 7-20kN/m² c'²=0 @-30⁰ Sity clay soil 7-18kN/m² #-15° e²-30 kPa Sand 7=22 kN/m² c'=0 ¹-27⁰ Rankine's Active earth pressure x=K₂0¹₂-20¹√√K X/A sind 1+sin- Rankine's Passive earth pressure xip=Ko'z+2√√K₂ sind sin