Use of Geotextile For Peat Soil In Construction Building

GEOTECHNICS ENGINEERING BFC 21702

MUHAMMAD SHAFIQ BIN ABD JALILMUHAMMAD ZAKWAN BIN HAMIZI

MUHAMMAD ZIQRIE BIN AZMIMOHAMAD ASYRAF BIN KAMARUDIN

AHMAD NASRI BIN SADIMAN

Objective

• Enknowledge the problem of peat soil

• Determine the type of Geosynthetics and its used

• Determine the effectiveness between geotextile and geogrid for its problematic and suitable condition of peat soil.

• Suitable geosynthetic material for soft soil stabilizer.

Problem Statement

Peat Soil

• Ge

Geotextile• Ge

1. GEOTEXTILES

- One of the two largest groups of geosynthetic.

- Consist of synthetic fibers made into flexible, porous fabric as known woven fabric.

- Matted together in a random non woven manner.

- Porous to liquid flow.

2. GEOGRIDS

- Non woven or knitted textile fabric.

- Consist of polymers formed into very open, gridlike configuration.

- Uniaxial and biaxial

3. GEOSPACERS

4. GEOMEMBRANES

5. GEOFOAM

Non woven geotextile

Biaxial geogrid

Woven geotextile

Uniaxial geogrid

Geospacers Geofoam

Video

• https://www.youtube.com/watch?v=x5seb28BlAs

Procedure

• Widely used as to reinforce soil masses in the design of retaining walls and slopes.• Also used as basal reinforcements for embankments constructed over

soft foundation soils.• To separate the soil sub grade from the unpaved aggregate.• Used as to allows drainage in the soil.• Used as filter fabrics in subsurface drainage and erosion control.

Geosynthetics Areas Of Application

• In Roads and Pavements: • Subgrade separation and Stabilization, • Base Reinforcement, • Overlay Stress Absorption and Reinforcement.

• In Subsurface Drainage: • Subgrade dewatering, • Road base drainage, • Structure drainage.

• In Erosion and Sediment Control• Hard Armor Systems, Silt Fence.

• In Reinforced Soil Systems: • Embankments over soft foundations, • Reinforced Steepened slopes, • Reinforced soil walls.

• In Seepage control systems• Structure water proofing, • Environmental Protection.

• In Support Systems: • Prefabricated Systems and On-site Fabrication

Installation Of Geotextile

Geotextile Installation can be an easy process when you have the proper tools and installation procedure. Below you will find a general guide to installation any of our geotextile fabrics..

GEOTEXTILE INSTALLATION PROCEDURE:

STEP 1

• Prepare the install area. This will typically involve a process of removing trees and brush from the top layer of soil and vegetation from the subgrade materials. Weak pockets of soil should be replaced with granular fill.

STEP 2

• Smooth and level the subgrade. All depression or humps within the subgrade should be removed.

STEP 3

• Place the geotextile in the prepared installation area. Fabric should be laid out according to engineered plans or site recommendations. Fabric should be stretched as tight and as flat as possible.

STEP 4

• Overlap adjacent rolls as specified for your site. If no instructions exist, fabric should be overlapped at a minimum or 12-18 inches.

Fig 1: Geotextile Landfilling

Fig 2: Reservoir liner geotextile

Fig 3: Installation of geotextile materials

Fig 4: Woven geotextile

SEWING OR OVERLAPPING

When installing a geotextile, adjacent fabric can either be sewn or overlapped. The following is from the AASHTO and is set as general guidelines for

determining when to sew and when to overlap:

Soil CBR> 3 - Minimum overlap of 0.3 to 0.45 mSoil CBR 1-3 - Minimum overlap of 0.6-1mSoil CBR< 0.5 - Must be sewn

Securing Geotextiles and Fill Placement

FILLING

Loosely place fill directly on the geotextile in 8" to 12" lifts. For very weak subgrades, 18" or thicker may be required.

SECURINGSecure the fabric with staples, pins, soil or other suitable materials. Fabric

should be secured along the edges and then at overlapping portions.

Video

• https://www.youtube.com/watch?v=15PaTXcPYh4

Advantage and Disadvantage

Advantage• Can be installed quickly with flexibility to construct during short

period• Durable, long lasting and environmentally safe solutions to

geotechnical engineering projects• The envisaged functional lifetime of geosynthetics is extremely long,

in many cases over 100 years• Minimizes the regular repair and maintenance costs • Prevent accidents, increase efficiency of structures

Disadvantage

• Climate change and the invasion of bacteria will reduce the strength of geosynthetic• Weak to the ultraviolet rays. The materials of geosynthetic will

undergo rapid degradation under the blazing sun.• The polymeric materials are manufactured using petroleum products

which are expensive especially for the developing countries• Polymeric materials are usually non-renewable resource• Polymeric materials can create environmental pollutants

Conclusion

The using of geosynthetic in the construction process provide an efficient way for the stabilization of the problematic soil. Its helps to

increase the strength of the soil condition and makes it more better. Its also have great potential to be used as cost-effective solutions for

several engineering problems.

Reference

• “Handbook of geosynthetics” Geosynthetics Material Association, 2009.• “Strength characteristic of soft soil reinforced with coir fibres.” Wan

Hasmida Binti wan Hassan, Faculty of Civil Engineering & Earth Resources, Universiti Malaysia Pahang, 2010• www.erosionpollution,com