Neoweb® Earth Retention Engineering Methodology

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
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)
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)
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