Neoweb® Earth Retention Engineering Methodology

Neoweb™ Earth Retention System • Stabilizes unstable slopes based on their geometry, soil properties and loads.. Slope Stability ExaminationIs the slope Un-stable?. Gravity Wall Height ≤

Engineering Seminar, PRS

July 2010

Neoweb® Earth Retention Engineering Methodology

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

• 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 Stability Examination

Is the slope Un-stable?

>> Go to Neoweb Earth Retention System

Wall Definition

1 Geometry:

Wall Definition

2 Loads / Actions:

Wall Definition

3 Soil Properties:

• Description,

• Internal Friction Angle φ [°]

• Cohesion C [kPa]

• Unit Weight γ [kN/m3]

NEOWEB Retention Solutions

1 Gravity Wall

Height ≤6.0m

Inclination ≤81° (6V:1H)

* No Reinforcement layers

NEOWEB Solutions

2 Reinforced Wall

Height 4.0-20.0m

Inclination ≤81° (6V:1H)

Reinforcement layers:

- Uniaxial Geogrid,

- Neoweb™,

- Woven Geotextile.

NEOWEB Solutions

3 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

4 Fascia Wall

For stable slopes

Height 1.0-20.0m

Inclination ≤81° (6V:1H)

Inclination ≤81° (6V:1H)

No Reinforcement layers

Minimum anchors to back slope

NEOWEB Solutions

5 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

6 Free Standing Wall

Height ≤ 20.0m

Inclination ≤81° (6V:1H)

Inclination ≤81° (6V:1H)

Reinforcement layers:

- Uniaxial Geogrid,

- Neoweb™,

- Woven Geotextile.

Wall Stability Analysis

LOCAL STABILITY

GLOBAL STABILITY

WALL IS STABLE

Wall Stability Analysis

GRAVITY STRUCTURES

LOCAL STABILITY EACH NEOWEB™ LAYER

DIRECT SLIDING OVERTURNING / ECCENTRICITY

GLOBAL STABILITY

DIRECT SLIDING

OVERTURNING / ECCENTRICITY BEARING CAPACITY

Wall Stability Analysis

REINFORCED STRUCTURES

LOCAL STABILITY

EACH REINFORCEMENT LAYER

DIRECT SLIDING

OVERTURNING / ECCENTRICITY REINFORCEMENT STRENGTH

PULLOUT

FASCIA-REINFORCEMENT CONNECTION OVERTURNING / ECCENTRICITY

GLOBAL STABILITY

DIRECT SLIDING

OVERTURNING / ECCENTRICITY BEARING CAPACITY

Thank You