A1 Highway Pyrzowice-Piekary Śląskie

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Consolidamento di versanti - A1 Highway Pyrzowice-Piekary Śląskie 2011

Deep cut along the A1 Highway between Pyrzowice and Piekary Śląskie - nailing and flexible facing using TECCO^® SYSTEM³ ensure safety and a natural look

For the cuts along the highway the top down method with benching was applied. The benches were subsequently nailed and covered with TECCO^® SYSTEM³

To make the nailing as efficient as possible, some subcontractors used drill rigs installed on an excavator. This allowed drilling works flexibility

November 2010 - visible installation of self drilling TITAN nails

To allow optimal TECCO^® SYSTEM³ pre-tensioning, nails were cut to the slope face and dells around were prepared

Flexible facing using TECCO^® SYSTEM³ during installation, after the anti-erosion mats have been placed on the slope

TECCO^® SYSTEM³ partially installed - the pre-tensioning minimises the risk of further slope deformations

Directly after nailing slope facing application, an extra layer of humus was applied to support further greening

Thanks to the applied solutions, the greening came very fast and required only seeding

Closer look on the fully stabilized slopes - TECCO^® SYSTEM³ is nearly invisible and allows fast greening

The highway after the opening

Stabilized cut - thanks to the applied solutions, the slopes maintain their natural look

Sistemi

TECCO^® G65/3

Anno di installazione

2011

Situazione iniziale

The Polish A1 highway connecting Poland from south to north leads through Silesia. Because of the morphology of the terrain, deep cuts were required. Due to geological conditions and also due to the fact that this area is strongly influenced by the hard coal mining activity, slope stabilization was a must.

Geologia

Marls, silts, sandstones and limestones.

Descrizione

For the following reasons designers together with the Polish National Roads selected TECCO^® System as a stabilizing solution:

complicated ground conditions – about 12 geotechnical layers were described, only 4 of these were rocks and all others soil in different compositions
there was an apprehension that after digging and taking off such mass of material, there will be a release of the energy and consequently, the slopes will be prone to collapse - which is quite common especially for such high slopes
the system can be designed and dimensioned against superficial instabilities which offer the possibility to arrange the nails in a more economical way due to the capability of TECCO^® System mesh in absorbing and transferring high loads
when slopes stabilized with TECCO^® System are combined with anti-erosion mats, they can regain a natural or vegetated appearance, which is aesthetically preferred.

TECCO^® System was designed to protect local instabilities of soil and rock masses. This worked perfectly, as first visible small movements occurred which were stopped by the TECCO^® System mesh shortly after installation.

Cliente

General Directorate of National Roads and Motorways

Contraente:

BUDIMEX S.A.

Oggetto protetto

Strada

Protezione dalla corrosione

GEOBRUGG SUPERCOATING

Progettazione:

Complex Project Sp. z o.o. / Transprojekt Kraków Sp. z o.o.

Altre società partecipanti

Stump-Hydrobudowa Sp. z o.o. / Italcementaciones S.L.U. / PPI Chrobok S.A. / ZRI Chrobok sp.j.