Geosynthetic composites are used behind and beneath of a gabion retaining wall (as shown in the figure). The horizontal stress acting on the geocomposite behind the wall is 100 kPa. The normal stress acting on the base drain is 500 kPa. The flow from the backfill soil is 2.5x10-6 m/sec. The slope of the base drain is 11:10L. The cumulative reduction factor is 5.0 for both geocomposites. Two products are considered: (1) biplanar geonet composite and (ii) sheet drain-N. Determine the factor safety for them in both locations. 10-2 Normal stress = 100 kPa 10-3 0- Sheet drain - N Sheet drain - T Sheet drain - M Geonet-triplanar Geonet-biplanar Sheet drain - E Geonet (trplanar) composite Geonet (biplanar)-composite NP-NW-GT (1500 g/m2) NP-NW-GT (1000 g/m2) - 10-4 Flow rate (m/sec-m) -- 10-5 10-6 10-> 10-2 10-1 100 Hydraulic gradient (a) Variation of hydraulic gradient 102 Hydraulic gradient = 0.1 10-3 O Sheet drain - E Sheet drain - T Sheet drain - N Sheet drain - M Geonet-triplanar Geonet-biplanar Geonet (triplanar) composite Geonet (biplanar)-composite NW-NP-GT (1500 g/m2) NW-NP-GT (1000 g/m2) Flow rate (m2/sec-m) 10-4 10-5 10 6 0 100 400 500 200 300 Normal stress (kPa) (b) Variation of normal stress Geosynthetic composites are used behind and beneath of a gabion retaining wall (as shown in the figure). The horizontal stress acting on the geocomposite behind the wall is 100 kPa. The normal stress acting on the base drain is 500 kPa. The flow from the backfill soil is 2.5x10-6 m/sec. The slope of the base drain is 11:10L. The cumulative reduction factor is 5.0 for both geocomposites. Two products are considered: (1) biplanar geonet composite and (ii) sheet drain-N. Determine the factor safety for them in both locations. 10-2 Normal stress = 100 kPa 10-3 0- Sheet drain - N Sheet drain - T Sheet drain - M Geonet-triplanar Geonet-biplanar Sheet drain - E Geonet (trplanar) composite Geonet (biplanar)-composite NP-NW-GT (1500 g/m2) NP-NW-GT (1000 g/m2) - 10-4 Flow rate (m/sec-m) -- 10-5 10-6 10-> 10-2 10-1 100 Hydraulic gradient (a) Variation of hydraulic gradient 102 Hydraulic gradient = 0.1 10-3 O Sheet drain - E Sheet drain - T Sheet drain - N Sheet drain - M Geonet-triplanar Geonet-biplanar Geonet (triplanar) composite Geonet (biplanar)-composite NW-NP-GT (1500 g/m2) NW-NP-GT (1000 g/m2) Flow rate (m2/sec-m) 10-4 10-5 10 6 0 100 400 500 200 300 Normal stress (kPa) (b) Variation of normal stress