7 Seepage - 1 Seepag Seepage Sheet pile walls and...

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Unformatted text preview: 1 Seepag Seepage Sheet pile walls and Cofferdams Sheet piling is a form of driven piling using thin interlocking sheets of steel to using thin interlocking sheets of steel to obtain a continuous barrier in the ground. The main application of steel sheet piles is in retaining walls and cofferdams erected to enable permanent works to proceed. 1 Flow Net Example Flow-Net Examples Example 1 Find Porewater Pressure at Points A and B 2 Example 2 Find water pressure on sheet pile wall Example 2 Find water pressure on sheet pile wall Back Front A B C D E F 1 2 G 3 3 Example 2 Find water pressure on sheet pile wall Back Front A B C D E F 1 2 9 10 11 12 1 2 G 3 4 5 7 6 8 2 4 4.7 Example 2 Find water pressure on sheet pile wall Total Head = m Nd = dH = Total head/Nd = Back of Wal Front of Wal Net Water Pressure Location Elevation Head Total head Pressure head Water Pressure Total head Pressure head Water Pressure (m) nd (m) (3-1) (kPa) nd (m) (7-1) (kPa) kPa 1 2 3 4 5 6 7 8 9 1 A B C D E F G 4 Example 2 Find water pressure on sheet pile wall Total Head = 2.5 m Nd = 12 dH = Total head/Nd = 0.21 Net Water Back of Wall Front of Wall Location Elevation Head...
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This document was uploaded on 02/09/2010.

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7 Seepage - 1 Seepag Seepage Sheet pile walls and...

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