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Chenani Nashri Tunnel Portal (2017) 2017 - Geobrugg Chenani Nashri Tunnel Portal (2017) 2017 - Geobrugg
Chenani Nashri Tunnel Portal (2017) 2017 - Geobrugg Chenani Nashri Tunnel Portal (2017) 2017 - Geobrugg
Chenani Nashri Tunnel Portal (2017) 2017 - Geobrugg Chenani Nashri Tunnel Portal (2017) 2017 - Geobrugg
Chenani Nashri Tunnel Portal (2017) 2017 - Geobrugg Chenani Nashri Tunnel Portal (2017) 2017 - Geobrugg
Chenani Nashri Tunnel Portal (2017) 2017 - Geobrugg Chenani Nashri Tunnel Portal (2017) 2017 - Geobrugg
Chenani Nashri Tunnel Portal (2017) 2017 - Geobrugg Chenani Nashri Tunnel Portal (2017) 2017 - Geobrugg
Chenani Nashri Tunnel Portal (2017) 2017 - Geobrugg Chenani Nashri Tunnel Portal (2017) 2017 - Geobrugg
Chenani Nashri Tunnel Portal (2017) 2017 - Geobrugg Chenani Nashri Tunnel Portal (2017) 2017 - Geobrugg

Chenani Nashri Tunnel Portal (2017)

   Distribuire
Strada
NH 44, Chenani Nashri
Codice postale
182141
Luogo
Udhampur, Jammu & Kashmir
Paese / Regione
India
Anno di installazione
2017
Cliente
N.H.A.I. (National Highways Authority of India)
Progettazione:
IL&FS Transportation Networks Ltd.
Oggetto protetto
Strada, Infrastrutture
Sistemi
TECCO® G65/3
Protezione dalla corrosione
GEOBRUGG SUPERCOATING®
Area stabilizzata
32000 m²
Altezza versante
70 m
Inclinazione versante
65 ° - 70 °
Rinverdimento
Tappeto anti erosione
Esposizione
A nord
Altre applicazioni installate
Protezione da caduta massi
Situazione iniziale

The site was initially proposed to be treated with shotcrete but persistent seepage of water which caused slope failures and cracks on the portals led the concessionaire to go for an alternate solution which does not only stabilize the slopes but also offers a green solution and allows the hydrostatic pressure to disperse. National Highway Authority of India decided to actively stabilize the tunnel portals. A protective measure had to be selected to stabilize the exposed cutting against superficial instabilities, as well as tilts and slides of individual blocks and rockfalls.

The area of the slopes to be treated and protected amounts to a total of 32'000 m² which includes 4 berms and the top path up to a maximum height of ca. 55 m.

Descrizione

The slope stabilization solution consisted of both active and passive protection measures.The flexible slope stabilization system consisting of TECCO® System and coir mat, system spike plates and soil nails had been selected. 

Each berm is stabilized using rock-bolts of a maximum depth of 20 m in conjunction with high tensile steel wire mesh. Perforated drain pipes, wrapped in geotextile, at an interval of 6.0 x 6.0 m are also installed to allow excess water to pass.

In addition, vertical and horizontal drainage channels are provided to channelize rain and excess water to pass and not accumulate and seep under the slopes. Variable grid patterns of 2.0 x 2.0 m and 2.5 m x 2.5 m are adopted on this project. 32 mm thick, fully threaded rock-bolts were used in this project and total drill lenght achieved is approximately 11'0000 m.

An additional GBE-500A rockfall barrier line was installed which can absorb impact energies up to 500 kJ.

See also our rockfall project Chenani Nashri Tunnel Portal (2)

Il contatto locale

Kevin H. Coyle
Kevin H. Coyle
Regional Manager Northeast
Sistemi contro il dissesto idrogeologico
Geobrugg North America, LLC
3 Beaudet Terr
Columbia CT 06237 / Stati Uniti d'America
Telefono +1 860 377 3230

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Saleh Feidi
Saleh Feidi
Regional Manager California
Sistemi contro il dissesto idrogeologico
Geobrugg North America, LLC
8921 Emperor Ave.
San Gabriel, California 91775 / Stati Uniti d'America
Telefono +1 909 706 8964

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John Kalejta
John Kalejta
Regional Manager Central US
Sistemi contro il dissesto idrogeologico
Geobrugg North America, LLC
3215 67th Avenue Pl
Greeley CO 80634 / Stati Uniti d'America
Telefono +1 505 220 1404

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Bob Lyne
Bob Lyne
Regional Manager Southeast
Sistemi contro il dissesto idrogeologico
Geobrugg North America, LLC
8004 Windspray Drive
Summerfield NC 27358 / Stati Uniti d'America
Telefono +1 336 337 0945

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Pierce Runnels, Civil Engineer
Pierce Runnels, Civil Engineer
General Manager Geobrugg North America
Sistemi contro il dissesto idrogeologico
Geobrugg North America, LLC
22 Centro Algodones
Telefono +1 505 771 4080
Mobile +1 505 400 0796

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Tim Shevlin
Tim Shevlin
Sales Director
Sistemi contro il dissesto idrogeologico
Geobrugg North America, LLC
4676 Commercial St. SE, PMB 174
Salem OR 97302 / Stati Uniti d'America
Telefono +1 503 423 7258

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