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Hermann-Hesse-Bahn Althengstett Tunnel Forst

Укрепление склонов - Hermann-Hesse-Bahn Althengstett Tunnel Forst 2019

Protective mesh at the tunnel portal, with bat culverts

Укрепление склонов - Hermann-Hesse-Bahn Althengstett Tunnel Forst 2019

TECCO® G65/3 covering the heavily weathered retaining wall

Укрепление склонов - Hermann-Hesse-Bahn Althengstett Tunnel Forst 2019

Stabilized natural stone retaining wall up to 6 meters high

Укрепление склонов - Hermann-Hesse-Bahn Althengstett Tunnel Forst 2019

Protected tunnel portal with a cutout for the stairs

Укрепление склонов - Hermann-Hesse-Bahn Althengstett Tunnel Forst 2019

Overall view of the stabilized wall

 

Системы

 

Год установки

2019

Ситуация

The Black Forest Railway has been recently reactivated between the cities of Weil der Stadt  and Calw. The Hermann Hesse Railway  has now once again connected Calw to the Stuttgart region. A particular challenge was the 1200 meter long and up to 36-meter deep cutting between Althengstett and Calw, which dates back to 1872.


Its embankments were originally supported at the foot by up to 6 meter high natural stone walls, which in some areas are heavily weathered and are exposed to further erosion. In addition to the stability and economic efficiency, high demands on nature conservation  had to be taken into account during the rehabilitation. The entire cutting area is located in the Black Forest Nature Park.

Rеология

Middle Triassic strata of the Lower Muschelkalk

The region contains the Freudenstadt Formation, which is up to 55 meters thick and consists of clayey, sometimes also sandy dolomitic marls with intercalated harder dolomite layers.

The formation is underlain by an approximately three-meter red clay formation of the Upper Buntsandstein. The layer boundary is recognizable in the terrain by its colors gray-beige (Muschelkalk) to dark red (Buntsandstein).

Описание

The stabilization of the embankment and the protective wall was accomplished with 3,200 m² of high tensile TECCO® G65/3 mesh. An additional 320 m² of stabilization was installed on the right side of the tunnel portal. The access stairs, as well as bat culverts, were also stabilized. The high tensile mesh was selected due to its strength properties, corrosion resistance, low visibility, uniform strength for anchor placement and speed of installation.

The water flow conditions and the current sintering in the retaining wall are now largely preserved by the mesh. The broken-out wall stones were replaced, prior to meshing and thus an attractive surface has been created. The historic site is now protected by the TECCO® system.  

Страна / Регион

Германия

Подрядчик

Dahil olan diğer şirketler

Защищаемый объект

Железнодорожная линия

Защита от коррозии

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Kevin Coyle
 

Kevin Coyle

Regional Manager Northeast

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

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Saleh Feidi
 

Saleh Feidi

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Geobrugg North America, LLC,8921 Emperor Ave.,91775 San Gabriel, California / США

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John Kalejta
 

John Kalejta

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Geobrugg North America, LLC,KS 67226 Wichita / США

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Bob Lyne
 

Bob Lyne

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Geobrugg North America, LLC,8004 Windspray Drive,NC 27358 Summerfield / США

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Pierce Runnels, Civil Engineer
   

Pierce Runnels

General Manager Geobrugg North America

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

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Tim Shevlin
 

Tim Shevlin

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Geobrugg North America, LLC,OR 97302 Salem / США

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