Session Start Date

6-1-1988

Abstract

At EVIRES PASS, between ANNECY and MONT BLANC in FRANCE, subsoil is made up of unstable clayey natural versants and marly bedrock affected by previous or current slidings. The problems encountered during the new A41-Highway construction were aggravated by the proximity of Road and Railway located on top of the same versant. The final Design consisted of succession of cuts and embankments with special soil reinforcement techniques to improve stability. So two existing unstable Railway embankments were promptly consolidated by "soil nailing" with driven steel dowel-piles which were either anchored or not. Two other high cuts in marls and sandstones affected by previous landslides were reinforced by incorporation of several ranges of anchored concrete slabs. A high embankment on inclined Soft Soil was founded on stone-columns made of crushed limestone strongly compacted in order to provide safety against sliding. Control instruments were installed prior and after performance of works, with a view to observe the actual behaviour of the performed reinforcements and to adapt the Project if necessary.

Department(s)

Civil, Architectural and Environmental Engineering

Appears In

International Conference on Case Histories in Geotechnical Engineering

Meeting Name

Second Conference

Publisher

University of Missouri--Rolla

Publication Date

6-1-1988

Document Version

Final Version

Rights

© 1988 University of Missouri--Rolla, All rights reserved.

Document Type

Article - Conference proceedings

File Type

text

Language

English

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Jun 1st, 12:00 AM

Recent Examples of Cut and Fill Reinforcement on A41-Highway in France

At EVIRES PASS, between ANNECY and MONT BLANC in FRANCE, subsoil is made up of unstable clayey natural versants and marly bedrock affected by previous or current slidings. The problems encountered during the new A41-Highway construction were aggravated by the proximity of Road and Railway located on top of the same versant. The final Design consisted of succession of cuts and embankments with special soil reinforcement techniques to improve stability. So two existing unstable Railway embankments were promptly consolidated by "soil nailing" with driven steel dowel-piles which were either anchored or not. Two other high cuts in marls and sandstones affected by previous landslides were reinforced by incorporation of several ranges of anchored concrete slabs. A high embankment on inclined Soft Soil was founded on stone-columns made of crushed limestone strongly compacted in order to provide safety against sliding. Control instruments were installed prior and after performance of works, with a view to observe the actual behaviour of the performed reinforcements and to adapt the Project if necessary.