DESIGN FUNDAMENTALS FOR

GEOSYNTHETIC SOIL TECHNIQUE

by:Dandung S. Harninto

GEO = earth, soilSYNTHETIC = made by human

Geosynthetics =• A planar, polymeric (synthetic or natural)

material used in contact with soil/rock and/or any other geotechnical material, for Filtration,Drainage, Separation, Reinforcement, Protection, Sealing and Packing.

GEOSYNTHETICS

PERMEABLE IMPERMEABLE

Geotextiles Related ProductsGeosyntheticClay Liners

(GCL)Geomembranes

Woven

Non Woven

Knitted

Geogrids

Geonets

Geocells

Geostrips

Geomats

Geospacers

Polymeric-Elastomerics

- Thermoplastic

Bituminous

GEOSYNTHETICS

PERMEABLE IMPERMEABLE

Geotextiles Related ProductsGeosyntheticClay Liners

(GCL)Geomembranes

Woven

Non Woven

Knitted

Geogrids

Geonets

Geocells

Geostrips

Geomats

Geospacers

Polymeric-Elastomerics

- Thermoplastic

Bituminous

GEOSYNTHETICS

PERMEABLE IMPERMEABLE

Geotextiles Related ProductsGeosyntheticClay Liners

(GCL)Geomembranes

Woven

Non Woven

Knitted

Geogrids

Geonets

Geocells

Geostrips

Geomats

Geospacers

Polymeric-Elastomerics

- Thermoplastic

Bituminous

GEOSYNTHETICS

PERMEABLE IMPERMEABLE

Geotextiles Related ProductsGeosyntheticClay Liners

(GCL)Geomembranes

Woven

Non Woven

Knitted

Geogrids

Geonets

Geocells

Geostrips

Geomats

Geospacers

Polymeric-Elastomerics

- Thermoplastic

Bituminous

GEOSYNTHETICS

PERMEABLE IMPERMEABLE

Geotextiles Related ProductsGeosyntheticClay Liners

(GCL)Geomembranes

Woven

Non Woven

Knitted

Geogrids

Geonets

Geocells

Geostrips

Geomats

Geospacers

Polymeric-Elastomerics

- Thermoplastic

Bituminous

GEOSYNTHETICS

PERMEABLE IMPERMEABLE

Geotextiles Related ProductsGeosyntheticClay Liners

(GCL)Geomembranes

Woven

Non Woven

Knitted

Geogrids

Geonets

Geocells

Geostrips

Geomats

Geospacers

Polymeric-Elastomerics

- Thermoplastic

Bituminous

GEOSYNTHETICS

PERMEABLE IMPERMEABLE

Geotextiles Related ProductsGeosyntheticClay Liners

(GCL)Geomembranes

Woven

Non Woven

Knitted

Geogrids

Geonets

Geocells

Geostrips

Geomats

Geospacers

Polymeric-Elastomerics

- Thermoplastic

Bituminous

GEOSYNTHETICS

PERMEABLE IMPERMEABLE

Geotextiles Related ProductsGeosyntheticClay Liners

(GCL)Geomembranes

Woven

Non Woven

Knitted

Geogrids

Geonets

Geocells

Geostrips

Geomats

Geospacers

Polymeric-Elastomerics

- Thermoplastic

Bituminous

GEOSYNTHETICS

PERMEABLE IMPERMEABLE

Geotextiles Related ProductsGeosyntheticClay Liners

(GCL)Geomembranes

Woven

Non Woven

Knitted

Geogrids

Geonets

Geocells

Geostrips

Geomats

Geospacers

Polymeric-Elastomerics

- Thermoplastic

Bituminous

GEOSYNTHETICS

PERMEABLE IMPERMEABLE

Geotextiles Related ProductsGeosyntheticClay Liners

(GCL)Geomembranes

Woven

Non Woven

Knitted

Geogrids

Geonets

Geocells

Geostrips

Geomats

Geospacers

Polymeric-Elastomerics

- Thermoplastic

Bituminous

GEOSYNTHETICS

PERMEABLE IMPERMEABLE

Geotextiles Related ProductsGeosyntheticClay Liners

(GCL)Geomembranes

Woven

Non Woven

Knitted

Geogrids

Geonets

Geocells

Geostrips

Geomats

Geospacers

Polymeric-Elastomerics

- Thermoplastic

Bituminous

GEOSYNTHETICS

PERMEABLE IMPERMEABLE

Geotextiles Related ProductsGeosyntheticClay Liners

(GCL)Geomembranes

Woven

Non Woven

Knitted

Geogrids

Geonets

Geocells

Geostrips

Geomats

Geospacers

Polymeric-Elastomerics

- Thermoplastic

Bituminous

GEOSYNTHETICS

PERMEABLE IMPERMEABLE

Geotextiles Related ProductsGeosyntheticClay Liners

(GCL)Geomembranes

Woven

Non Woven

Knitted

Geogrids

Geonets

Geocells

Geostrips

Geomats

Geospacers

Polymeric-Elastomerics

- Thermoplastic

Bituminous

Combigrids

GEOSYNTHETICS

PERMEABLE IMPERMEABLE

Geotextiles Related ProductsGeosyntheticClay Liners

(GCL)Geomembranes

Woven

Non Woven

Knitted

Geogrids

Geonets

Geocells

Geostrips

Geomats

Geospacers

Polymeric-Elastomerics

- Thermoplastic

Bituminous

Pvd =prefabricated vertical drain

GEOSYNTHETICS

PERMEABLE IMPERMEABLE

Geotextiles Related ProductsGeosyntheticClay Liners

(GCL)Geomembranes

Woven

Non Woven

Knitted

Geogrids

Geonets

Geocells

Geostrips

Geomats

Geospacers

Polymeric-Elastomerics

- Thermoplastic

Bituminous

geodrain

Bases Functions

• Drainage, to collect and transport fluids

>> geodrain>> prefabricated vertical drain

Bases Functions

• Filtration, to allow passage of fluids while preventing passage of soil particles

>> non woven geotextiles

Bases Functions• Protection, to prevent damage of a

layer

>> non woven geotextiles

Bases Functions• Reinforcement, to improve the shear

resistance of a soil

>> geogrids,>> high strength woven geotextiles

Bases Functions• Separation, to maintain the integrity of a soil

layer

>> non woven geotextiles>> woven geotextiles>> combination geogrids and non woven

Bases Functions• Erosion control, to prevent soil

erosion by water or wind forces

>> geomats

Bases Functions• Barrier, to prevent the migration of

liquids orgases

>> GCL>> geomembranes

Bases Functions• Containing, to cover soil or sand to prevents

of scouring

>> non woven geotextiles>> woven geotextiles

GEOSYNTHETIC REINFORCED SOIL TECHNIQUE

GEOSYNTHETIC REINFORCED SOIL TECHNIQUE

W1W2

ΣM = 0

M1

M2

Z1

MT1

Z2MT2

M1

M2+MZ1+MZ2 … = SF

GEOSYNTHETIC REINFORCED SOIL TECHNIQUE

GEOSYNTHETIC REINFORCED SOIL TECHNIQUE

The soil reinforcement by geosynthetics generatesa mechanical improvement of the soil bysupporting tensile forces. The reinforcing elementsare flexible and, due to their low bendingstiffness, can only absorb axial tensile loads. Theimprovement acts to reduce the shear force thathas to be carried by the soil, and to enhance theshearing resistance in the soil by increasing thenormal stress acting on potential shear surfaces.

Geosynthetic reinforced fill slopes and walls

Geosynthetic reinforced fill slopes and walls

Geosynthetic reinforced fill slopes and walls

Geosynthetic reinforced fill slopes and walls

Geosynthetic reinforced bearing layers

Geosynthetic reinforced bearing layers

Possible Reinforcement Function in Roadways (After Haliburton et al., 1981)

Geosynthetic reinforced bearing layers

a. Reinforcement at base/subgrade interface.

b. Reinforcement in base course.

Geosynthetic separate layers

Subgrade separation (After Rankilor, 1981)

Geosynthetic reinforced bearing layers

Applicability Assessment for unpaved roads. (After USACE, 2003).

Applicability assessment for flexible paved roads. (After US Army, 2003).

GEOSYNTHETIC SOIL TECHNIQUE FORWATERWAYS AND COASTAL PROTECTION

GEOSYNTHETIC SOIL TECHNIQUE FORWATERWAYS AND COASTAL PROTECTION

This can happen if you have choosen the wrong geosynthetic filter underneath your revetment system / or no erosion control at all

GEOSYNTHETIC SOIL TECHNIQUE FORWATERWAYS AND COASTAL PROTECTION

Overview of the application of geosynthetics in coastal protection.

GEOSYNTHETIC SOIL TECHNIQUE FORWATERWAYS AND COASTAL PROTECTION

GEOSYNTHETIC SOIL TECHNIQUE FORLANDFILL STRUCTURE

Capping

Base sealing

Gas Vent

Waste

Leachate Collection

TERIMA KASIH

Dandung S. Harninto