Neoweb® Earth Retention Engineering Methodology Engineering Seminar, PRS July 2010 Neoweb™ Earth Retention System • Stabilizes unstable slopes (based on their geometry, soil properties and loads) • Creates a Neoweb structure for retaining the soil of steep slopes and crest loads • Walls are constructed with horizontal multi- layered Neoweb sections infilled with granular soil, with or without back reinforcement • Provides improved Erosion Control system • Enables vegetated-environmental solution Slope Failures Slope Failures Slope Stability Examination Is the slope Un-stable? >> Go to Neoweb Earth Retention System Wall Definition Geometry: Wall Definition Loads / Actions: Wall Definition Soil Properties: • • • • Description, Internal Friction Angle φ [°] Cohesion C [kPa] Unit Weight γ [kN/m3] NEOWEB Retention Solutions Gravity Wall Height ≤6.0m Inclination ≤81° (6V:1H) * No Reinforcement layers NEOWEB Solutions Reinforced Wall Height 4.0-20.0m Inclination ≤81° (6V:1H) Reinforcement layers: - Uniaxial Geogrid, - Neoweb™, - Woven Geotextile NEOWEB Solutions Reinforced Slope Height 2.0-20.0m Inclination ≤63° (2V:1H) Reinforcement layers: - Uniaxial Geogrid, - Neoweb™, - Woven Geotextile Including Neoweb™ Slope Protection System NEOWEB Solutions Fascia Wall For stable slopes Height 1.0-20.0m Inclination ≤81° (6V:1H) No Reinforcement layers Minimum anchors to back slope NEOWEB Solutions Soil Nailing and Fascia Wall Height 5.0-30.0m Inclination ≤81° (6V:1H) No Reinforcement layers Soil Nailing stabilize slope and Neoweb™ Fascia NEOWEB Solutions Free Standing Wall Height ≤ 20.0m Inclination ≤81° (6V:1H) Reinforcement layers: - Uniaxial Geogrid, - Neoweb™, - Woven Geotextile Wall Stability Analysis LOCAL STABILITY WALL IS STABLE GLOBAL STABILITY Wall Stability Analysis GRAVITY STRUCTURES DIRECT SLIDING LOCAL STABILITY EACH NEOWEB™ LAYER OVERTURNING / ECCENTRICITY DIRECT SLIDING GLOBAL STABILITY BEARING CAPACITY OVERTURNING / ECCENTRICITY Wall Stability Analysis REINFORCED STRUCTURES DIRECT SLIDING PULLOUT LOCAL STABILITY EACH REINFORCEMENT LAYER REINFORCEMENT STRENGTH OVERTURNING / ECCENTRICITY FASCIA-REINFORCEMENT CONNECTION DIRECT SLIDING GLOBAL STABILITY BEARING CAPACITY OVERTURNING / ECCENTRICITY Thank You