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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)

   Teilen
Strasse
NH 44, Chenani Nashri
PLZ
182141
Ort
Udhampur, Jammu & Kashmir
Land/Region
Indien
Installationsjahr
2017
Kunde
N.H.A.I. (National Highways Authority of India)
Planer
IL&FS Transportation Networks Ltd.
Geschützte Objekte
Strasse, Infrastruktur
Systeme
TECCO® G65/3
Korrosionsschutz
GEOBRUGG SUPERCOATING®
Stabilisierte Fläche
32000 m²
Maximale Hanghöhe
70 m
Hangneigung
65 ° - 70 °
Begrünung
Ja
Erosionsschutzmatte
Ja
Ausrichtung
Nord
Weitere verbaute Anwendungen
Steinschlagschutz
Ausgangslage

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.

Massnahme

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)

Ansprechpartner

Kevin H. Coyle
Kevin H. Coyle
Regional Manager Northeast
Naturgefahren
Geobrugg North America, LLC
3 Beaudet Terr
Columbia CT 06237 / USA
Telefon +1 860 377 3230

Kontaktformular

Saleh Feidi
Saleh Feidi
Regional Manager California
Naturgefahren
Geobrugg North America, LLC
8921 Emperor Ave.
San Gabriel, California 91775 / USA
Telefon +1 909 706 8964

Kontaktformular

John Kalejta
John Kalejta
Regional Manager Central US
Naturgefahren
Geobrugg North America, LLC
3215 67th Avenue Pl
Greeley CO 80634 / USA
Telefon +1 505 220 1404

Kontaktformular

Bob Lyne
Bob Lyne
Regional Manager Southeast
Naturgefahren
Geobrugg North America, LLC
8004 Windspray Drive
Summerfield NC 27358 / USA
Telefon +1 336 337 0945

Kontaktformular

Pierce Runnels, Civil Engineer
Pierce Runnels, Civil Engineer
General Manager Geobrugg North America
Naturgefahren
Geobrugg North America, LLC
22 Centro Algodones
NM 87001 Algodones / USA
Telefon +1 505 771 4080
Mobil +1 505 400 0796

Kontaktformular

Tim Shevlin
Tim Shevlin
Sales Director
Naturgefahren
Geobrugg North America, LLC
4676 Commercial St. SE, PMB 174
Salem OR 97302 / USA
Telefon +1 503 423 7258

Kontaktformular