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TECHGRID GEOGRID REINFORCED SOIL WALLS WITH SEGMENTAL PANEL FACING


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PROJECT DESCRIPTION
Project:

Four Laning of Nagpur-Hyderabad Section of NH-7 from km: 123.00 to 153.00, Contract Package No.: NS-61 (MH)

Owner:

National Highways Authority of India

Contractor:

M/s Ideal Road Builders Pvt. Ltd., Mumbai

Consultant:

M/s. BCEOM-AARVEE Associates, New Delhi

RSRW at Nagpur-Hyderabad Section
RSRW at Nagpur-Hyderabad Section
RSRW at Nagpur-Hyderabad Section
RSRW at Nagpur-Hyderabad Section
SALIENT FEATURES
Wall Facing Area:

11781 Sqm

Wall Height:

13.0 m Maximum

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 (Static); FHWA-NHI-00-043 (Seismic)

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:

IRB Ltd has awarded the work of Reinforced Soil Retaining 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. The selection of panel facia is also as per the client requirement, for that newer mould has been made to have a corrugation finish at the front face.

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.

Table-1 shows the property of the reinforced infill, retained fill and foundation soil taken into consideration in the designs.

The design of the walls was carried out using the FHWA-NHI-00-043 guidelines and 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.

The project was successfully completed in February 2010.
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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