Laúca Hydro Power Plant

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.

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

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