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Slope Stability - Laúca Hydro Power Plant 2017

Overview project site: Visible are the 600 meters long rockfall barrier RXI-050 and the slopes above partially covered with TECCO® SYSTEM³

Slope Stability - Laúca Hydro Power Plant 2017

Top of the slope having the form of a cliff consisting tower structures

Slope Stability - Laúca Hydro Power Plant 2017

Complicated self-drilling nails INCO 32 TD type installation. All works required rope access

Slope Stability - Laúca Hydro Power Plant 2017

TECCO³ SYSTEM³ during installation works: drilling rig at the nearly vertical rockface with spike plates not yet tightened

Slope Stability - Laúca Hydro Power Plant 2017

Installation of TECCO® SYSTEM³ on top of the slope having the form of a cliff

Slope Stability - Laúca Hydro Power Plant 2017

Top of the slope stabilization with high tensile mesh TECCO® G65/3 and self-drilling nails INCO 32 TD

Slope Stability - Laúca Hydro Power Plant 2017

TECCO® SYSTEM³ during installation: visible unrolling of the high tensile TECCO® G65/3 mesh on the slope

Slope Stability - Laúca Hydro Power Plant 2017

Overview of the Laúca Hydro Power Plant construction site from above the RXI-050 rockfall barrier line

Slope Stability - Laúca Hydro Power Plant 2017

TECCO® SYSTEM³ during installation: visible scale of the project

Slope Stability - Laúca Hydro Power Plant 2017

RXI-050 rockfall barrier during installation: slope above is already protected with TECCO® SYSTEM³

Slope Stability - Laúca Hydro Power Plant 2017

ROCCO® high tensile net fastening being a part of the rockfall barrier RXI-050

Slope Stability - Laúca Hydro Power Plant 2017

Fully installed RXI-050 rockfall barrier. Slope above and below the barrier line is stabilized with the TECCO® SYSTEM³

Slope Stability - Laúca Hydro Power Plant 2017

Overview of the installation site: visible geomorphology of the whole slope

Slope Stability - Laúca Hydro Power Plant 2017

Aerial view of the construction site with a perfect overview of the rockfall barrier RXI-050 lines

 
 

Year of installation

2017

Initial situation

The Lauca Hydro Power Plant is located at the foot of a steep slope.  The slope requires stabilization to avoid causing damage to the facilities and equipment.

Geology

Project site consists of the following types of rock:

  • colluvium
  • silicified sandstone
  • porous sandstone
  • sandstone-siltstone transition
  • siltstone
  • gneiss from moderately fractured to strongly altered

Description

The following solutions were used for slope protection:

Top of the cliffs and tower shaped structures partially protected with TECCO® System:

  • high tensile mesh: TECCO® G65/3
  • self-drilling nails: INCO 32 TD
  • nail diameter: 32 mm
  • nail length: 4.0 m
  • nail pattern: 1.4 x 1.4 m

Tower shaped structures partially protected with TECCO® System and SPIDER® System:

  • high tensile mesh: TECCO® G65/3
  • high tensile net SPIDER S4-230
  • tower structure width below 3.0 m: nail pattern 1.4 x 1.4 m
  • tower structure width over 3.0 m: nail pattern 3.0 x 1.4 m

At the base of the tower structures:

  • high tensile mesh: TECCO® G65/3
  • self-drilling nails: INCO 32 TD
  • nail diameter: 32 mm
  • nail length: 4.0 m
  • nail pattern: 5.0 x 5.0 m

Regular area of the slope, between rockfall barrier line and top of the cliffs:

  • high tensile mesh: TECCO® G65/3
  • self-drilling nails: INCO 32 TD
  • nail diameter: 32 mm
  • nail length: 4.0 m
  • nail pattern: 5.0 x 5.0 m

Below the rockfall barrier, ca. 10 m high zone directly above slope cut:

  • high tensile mesh: TECCO® G65/3
  • self-drilling nails: INCO 32 TD
  • nail diameter: 32 mm
  • nail length: 8.0 m
  • nail pattern: 2.0 x 2.0 m

Self drilling nails were used due to  fractured condition of the  rock slope.

Passive rockfall protection barrier:

  • rockfall protection barrier RXI-050
  • height: 4 m
  • length: 600 m in 3 sections of: 180 m / 240 m / 180 m

 

Customer

Aproveitamento Hidroeléctrico de Laúca

Engineering

Intertechne Consultores S.A.

Other participating companies

Tecnasol Fundações E Geotecnia, S.A.

Protected object

Road, Building, Infrastructure, Other

Corrosion protection

GEOBRUGG SUPERCOATING

Your local contact

Kevin H. Coyle
 

Kevin H. Coyle

Regional Manager Northeast

Natural Hazards
Hydraulic Engineering
Geobrugg North America, LLC,3 Beaudet Terr,Columbia CT 06237 / United States Regional Manager Northeast

E-Mail

Saleh Feidi
 

Saleh Feidi

Regional Manager California

Natural Hazards
Hydraulic Engineering
Geobrugg North America, LLC,8921 Emperor Ave.,San Gabriel, California 91775 / United States Regional Manager California

E-Mail

John Kalejta
 

John Kalejta

Regional Manager Central US

Natural Hazards
Hydraulic Engineering
Geobrugg North America, LLC,3215 67th Avenue Pl,Greeley CO 80634 / United States Regional Manager Central US

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Bob Lyne
 

Bob Lyne

Regional Manager Southeast

Natural Hazards
Hydraulic Engineering
Geobrugg North America, LLC,8004 Windspray Drive,Summerfield NC 27358 / United States Regional Manager Southeast

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Pierce Runnels, Civil Engineer
   

Pierce Runnels

General Manager Geobrugg North America

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

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Tim Shevlin
 

Tim Shevlin

Sales Director

Natural Hazards
Geobrugg North America, LLC,Salem OR 97302 / United States Sales Director

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