SLOPE STABILISATION

AVALONS KEY STAFF EACH HAVE OVER 20 YEARS EXPERIENCE IN DIFFICULT AND HIGH ACCESS GEOTECHNICAL SLOPE STABILISATION WORK.

AVALON specialises in slope stability investigation and remediation in high and difficult access locations, including hazard and risk assessments. We carry professional indemnity insurance and offer a full consultancy service including interpretative reports and remedial designs. Our specialist abilities and knowledge are frequently drawn on by other consulting engineers for assistance with investigation and remedial contract specification.

WHAT IS SLOPE STABILISATION

New Zealand's active geology and extreme weather conditions leave us particularly exposed to rockfall and slips. Slope stabilisation systems are a key element in the design of modern infrastructure networks and have a direct impact on safety.

AVALON supplies slope stabilisation and rockfall protection systems that meet the very highest specifications of durability, strength and performance.

ACTIVE REINFORCEMENT

Active systems apply a pre-load at the potential rockfall or slip source to prevent detachment. Active mesh systems require closely spaced anchorages if they are to be truly effective. Where the rock or soil is non-compressible the pre-load can only be effective in projecting areas.

Tensioned Rock Bolts

Wire Rope Panels

Wire Rope

Strapping

Reinforced Mesh

Tensioned Soil Anchorages

DRAPED MESHING

Draped mesh or rockfall netting is the commonest means of mitigating rockfall hazards. Widely used internationally, installation is rapid and cost effective. AVALON installs a wide range of mesh types, from galvanised single twist through double twist zinc/aluminium/plastic coated to high energy absorbing wire rope panel systems.


EROSION CONTROL

Protecting soils and weaker rocks from our harsh climate:

Geogrids and Meshes

Vegetation Seeding

Geotextiles

Biotextiles

Shotcrete

Drainage

PASSIVE SUPPORT

Passive support becomes active during minor movement. This prevents full detachment. Component strengths are optimised and anchor/mesh patterns balanced using proven design software. Some examples of passive support include:

Soil Nails Conformed Mesh Systems

Rock Dowels In-situ Concrete Support

Reinforced Shotcrete

Passive support becomes active during minor movement which then prevents full detachment. Component strengths are optimised and anchor/mesh patterns balanced using design software. Some examples of passive support include:

DOUBLE TWIST MESH; ZnAl/pvc coated wire mesh

STEELGRID; double twist mesh with steel wire ropes

HEA PANELS; wire rope panels with high energy 'knots'

TENSAR; polymer geogrids for reinforcement

ENKAMAT; vegetal root reinforcement mat

BIOMAC; coir blanket for vegetation

Why choose Double Twist?
Double twist mesh can offer the following advantages:

  • Load transfer is equal.
  • Single Strand failure does not compromise the panel.
  • Deformation absorbs energy, allowing for lighter anchorages.
  • Long service life; PVC coating in addition to ZnAl.
  • Proven to be effective on thousands of sites worldwide.
  • Often more cost effective than alternatives.

Although each circumstance is different, we usually recommend double twist mesh as our main slope stabilisation solution.