The total active thrust on a vertical wall 3m high retaining a horizontal sand backfill (unit weight ? t = 20 kN/m 3 , angle of shearing resistance ?' = 30Â°) when the water table is at the bottom of the wall, will be:

The total active thrust on a vertical wall 3m high retaining a horizon

1.	The total active thrust on a vertical wall 3m high retaining a horizontal sand backfill (unit weight ? t = 20 kN/m 3 , angle of shearing resistance ?' = 30Â°) when the water table is at the bottom of the wall, will be:
A.	30 kN/m
B.	35 kN/m
C.	4 kN/m
D.	45 kN/m
Answer» B. 35 kN/m

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The total active thrust on a vertical wall 3m high retaining a horizontal sand backfill (unit weight ? t = 20 kN/m 3 , angle of shearing resistance ?' = 30Â°) when the water table is at the bottom of the wall, will be:

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