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A BRUGG GROUP COMPANY
USA

Mooirivier N3

N3, 3300, Mooiriver, Kwa-Zulu Natal, Südafrika
2019
Kunde
Roadmac
Planer
GaGE Consulting
Ausführende Firma
JobSA Engineering & Management
Geschützte Objekte
Strasse
Korrosionsschutz
Verzinkt
Stabilisierte Fläche
1750 m²
Maximale Hanghöhe
10 m
Hangneigung
45 ° - 70 °
Ausrichtung
Nord-Ost
Weitere verbaute Anwendungen
Böschungsstabilisierung
Ausgangslage

The N3 Toll Route is a key transport node linking the largest port, Durban Harbour, to South Africa’s economic hub, Gauteng. For this reason, the company managing the N3 Toll Route, the N3 Toll Concession’s road safety efforts, includes upgrade and maintenance programmes to ensure the extended lifespan of this important road link.


Geotechnical investigations revealed that the release depth of the superficial slope failure measured approx. 1- 2 m and caused one road line to collapse and slip down. The total project area covered 1’750 m2 The stabilized area was 100 m long and up to 10 m high with a 65° steep slope.

Geologie

The geology is characterized by shales, mudstones, and fine-grained sandstone. The area falls within the Grassland Biome with topography that is mainly flat and rolling but includes the escarpment itself. The climate condition in the area is characterised by heavy and frequent rainfalls, significantly increasing during the rainy season.

Massnahme

The slope stability work on the N3 involved the following work: On the one section, there was a diameter of 100 mm holes drilled by DTH up to 8 meters length. Steel anchors (32 mm galvanized gewi) had been installed with their necessary centralizers and tremie pipe for the injection of grout. A 30mpA grout mix was used. After seven days, the TECCO® mesh was installed. The anchors were secured onto the mesh with P66/50 galvanised spike plates on section 5a. A 13mm galvanized cable was used for the boundary rope.

On the slope section of this contract, two kinds of soil anchors, a 25 mm galvanized gewi of 8 meters length plus R32S self-drilling anchors of 16 meters length, were used. Holes were drilled 100 mm for the 25 mm gewi bars, and a 110 mm bit was used for the R32S self-drilling rod. While drilling, the grouting process was done simultaneously. On this section, we also used the TECCO® G65/4 with a P33/40 spike plate and 13 mm galvanized cable for the boundary rope. A total of 2514.50 meters had been drilled on this project.

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