Geogrid-As a soil reinforcement

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Seminar on-“GEOGRID AS A SOIL REINFORCEMENT”

Presented by:

-PATIL SACHIN SHIVAJIRAO

- B.E CIVIL ROLL NO-4150

- JNEC AURANGABAD.

Guide:

Prof. V.T.MORE

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INTRODUCTION

INTRODUCTION TO GEOSYNTHETIC

MATERIALS

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GEOSYNTHETIC MATERIALS:

1) GEOTEXTILES

2) GEOMEMBRANES

3)GEOGRIDS

4) GEOCOMPOSITES

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GEOGRID

Fig .Showing A Typical Geogrid

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GEOGRIDS ARE NOTHING BUT THE OPEN

STRUCTURES FORMED BY BONDING

POLYMER STRIPS AT THEIR CROSS POINT

OR PUNCHING

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HISTORICAL DEVELOPMENT

1) FIRST USED FOR ROAD CONSTRUCTION

IN SOUTH CAROLINA IN 1930

2) FOR EROSION CONTROL IN 1960 IN

EUROPE AS WELL AS U.S.A IN 1969

3) IN GREAT WALL OF CHINA ALSO USED

IN THE FORM OF TREE BRANCHES.

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TYPES OF GEOGRIDS

1)WOVEN GEOGRID

2)NONWOVEN GEOGRID

WOVEN GEOGRID:i.MICROGRID ii.STRATAGRIDiii.ONE WAY GEOGRIDiv.BIAXIAL GEOGRIDv.MULTILAYER GEOGRIDvi.WELDED STRIP GEOGRID

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Fig. Showing micro gridFig.Showing Strata Grid Fig.Showing one-way geogrid

Fig.Showing Biaxial geogrid. Fig.Showing multilayer geogrid. Fig.Showing welded geogrid.

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NEW LASER WELDED GEOGRID

1)WELDED PET GEOGRID

2)WELDED PP GEOGRID

Figure 2 Welded PP-geogrid

Figure1. Welded PET-geogrid

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GEOMETRY OF GEOGRID

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NON WOVEN OR EXTRUDED GEOGRID 

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MATERIALS: 1)POLYSTER

2)POLYVINYL ALCOHOL

3)POLY VINYL CHLORIDE

4)POLY PROPYLEN

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GEOGRID TESTING:

1.GEOGRID RIB TENSILE STRENGTH TEST

2.PULL OUT TEST

3.JUNCTION TEST

4.CHEMICAL RESISTANT TEST

5.BIOLOGICAL RESISTANCT TEST

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INSTALLATION GUIDELINES:

1.MATERIAL IDENTIFICATION

2.MATERIAL HANDLING

3.GEOGRID PLACEMENT

4.PLACEMENT OF FILL MATERIAL

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FUNCTIONS:

1.FLUID TRANSMISSION

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FILTRATION:

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SEPRATION:

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AS A REINFORCEMENT:

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APPLICATIONS OF GEOGRID:

1. RETAINING WALLS

2. BRIDGE / RAILWAY ABUTMENTS

3.REINFORCED SOIL SLOPES

4. REINFORCED FOUNDATION OVER PILES

5. REINFORCED EMBANKMENTS OVER SOFT

FOUNDATION

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GEOGRID COMPARED WITH OTHER SOLUTIONS

1. IT IS COST SAVING MATERIAL

2. IT INCREASES CONSTRUCTION SPEED

3. PROPER REINF OR CEMENT IS ACHIEVED

4. IMPROVED QUALITY

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DRAW BACKS:

1. POSSIBLE DAMAGE TO GEOGRID

2. IRREGULAR GEOMETRY

3. INCOMPLETE CODES AND

STANDARDISATION

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SITE VISIT:

CONSTRUCTION OF KRANTI CHOWK FLYOVER in Aurangabad.

1. FOR MAKING THE LOAD TRANSFER

PLATFORM

2. FOR SEPRATION OF SOIL MASS

3. FOR RETAINING WALL

USE:

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CONCLUSION:

1. TO EFFECTIVELY SOLVE SOME PROBLEMS OF SOIL MASS

LIKE, BEARING CAPACITY, FAILURE OF SLOPES,

EROSION CONTROL, LAND SLIP REPAIR, ROADS, QUICK

CONSTRUCTION AND ALL OTHER, GEOGRID IS BETTER

SOLUTION .

2. GEOGRIDS ARE MAGIC MATERIALS TO YIELD

EXCELLENT RESULTS .

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REFERENCES:

-Sanjay Kumar Shukla, Sanjay Shukla, “Geosynthetics and Their

Applications”, Bharti publication,New Delhi. Reprint 2010.

pages (1-225)

- Purushottam Raj “Ground Improvement Techniques”, Laxmi

Publications, Delhi, Reprint 2011. pages (117-250)

-Geogrid | geoace.com

THANK YOU.

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