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Укрепление склонов - Mooirivier N3 2019

Stabilized slope with TECCO® G65/4

Укрепление склонов - Mooirivier N3 2019

Instable slope, anchors are already placed

Укрепление склонов - Mooirivier N3 2019

Stabilizing the embankment of the National Road N3

Укрепление склонов - Mooirivier N3 2019

During installation

Укрепление склонов - Mooirivier N3 2019

Detail of the supporting mesh with spike plate

Укрепление склонов - Mooirivier N3 2019

Stabilized slope with TECCO® G65/4 and spike plates

 

Системы

 

Год установки

2019

Ситуация

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.

Rеология

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.

Описание

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.

Клиент

Roadmac

Подрядчик

JobSA Engineering & Management

Защищаемый объект

Дорога

Защита от коррозии

Оцинковка

Проектировщик

GaGE Consulting

Другие конструкции

Укрепление склонов

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Kevin H. Coyle
 

Kevin H. Coyle

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Инженерная защита
Гидротехника
Geobrugg North America, LLC,3 Beaudet Terr,Columbia CT 06237 / США Regional Manager Northeast

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Saleh Feidi
 

Saleh Feidi

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John Kalejta
 

John Kalejta

Regional Manager Central US

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Geobrugg North America, LLC,3215 67th Avenue Pl,Greeley CO 80634 / США Regional Manager Central US

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Bob Lyne
 

Bob Lyne

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Pierce Runnels, Civil Engineer
   

Pierce Runnels

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Инженерная защита
Geobrugg North America, LLC,22 Centro Algodones , Civil Engineer General Manager Geobrugg North America

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Tim Shevlin
 

Tim Shevlin

Sales Director

Инженерная защита
Geobrugg North America, LLC,Salem OR 97302 / США Sales Director

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