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TECHGRID GEOGRID REINFORCED SOIL WALLS WITH SEGMENTAL PANEL FACIA


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PROJECT DESCRIPTION
Project:

Reinforced soil walls with segmental panels facia system for ROBs Jadcherala-Kotakatta Road Project (KJRP) (Andhra Pradesh)

Client:

National Highway Authority of India

Contractor:

Larsen & Toubro Ltd.

Consultant:

ICT Pvt. Ltd., New Delhi

Erection of RS Wall
Completed RS Wall
Erection of RS Wall
Erection of RS Wall
SALIENT FEATURES
Wall Facing Area:

31054 Sqm

Wall Height:

10m

Soil Reinforcement:

TechGrid knitted & PVC coated polyester Geogrids with Tensile Strength Of 40 to 250 KN/m

Facing:

Segmental Panel Facia

Design Methodology:

BS 8006: 1995 (Static Condition)
FHWA-NHI-00-043 (Seismic Condition)

TFIIL’s scope of work:

Detailed engineering design and drawings, supply of geogrids, supply of moulds for casting of panels, supervision of construction

The Project:

L & T ECC Ltd. has awarded the work of Reinforced soil wall to M/s Techfab India Industries Ltd. The scope of work include, design of reinforced soil wall, their approval, submission of drawings, supply of moulds and supervision at site. There are approaches for ROBs, flyovers and vehicular underpass for reinforced soil work. The work location is spreaded at three locations, viz. Jadcherla (Ch.80), Divitapally (Ch.87) and Bhoothpur (Ch.92) of Jadcherla & Kothakota section of NH 7.

The Challenge:

Size of the panel has been selected by the client, i.e. 1.25m x 0.6m. It has been decided to use this panel with PET Geogrid with friction / tongue and groove connection. Designs must be checked for the connection strength for this type of panel-Geogrid arrangement,

The Solution:

Testing has been done at IIT-Madras for the friction based connection for Techgrid-PET with this panel type. Design has been checked and verified with consideration of test results and ensured the tension in Geogrid is less than the available connection strength at particular normal pressure.

Isometric View of Segemental Panel

The design of the walls was carried out using the BS 8006: 1995 for Static Condition & FHWA- NHI-00-043 for Seismic Condition, which comprised checks for external, internal and global stability under static and seismic conditions.

Construction of the wall was carried out under the supervision of TechFab India Industries Ltd’s supervision.

The project was successfully completed in February 2009.
FOR FURTHER DETAILS

TechFab India Industries Ltd.
711/712, Embassy Centre,
Nariman Point, Mumbai – 400021

022-2287 6224/6225

022- 2287 6218

anant@techfabindia.com

www.techfabindia.com

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