ElcoRock by Geofabrics Australasia Pty Ltd

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速

is better!

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Why

What is E LCOROCK®?

SMALL BAGS • 40kg, 60kg and 100kg  SMALL CONTAINERS • 0.35m³ and 0.75m³  MEDIUM CONTAINERS • 2.5m³  MEGA CONTAINERS • 2.5m + diameter  CUSTOM CONTAINERS • any size available.

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The ELCOROCK® shoreline protection system comprises geotextile sandfilled containers and tubes, and can take various forms:

One of the reasons the ELCOROCK® coastal erosion and shoreline protection system performs so well in the harsh conditions of the coastal foreshore is the special geotextile used in the geotextile sand-filled containers and tubes. For details on why the geotextile is critical to the performance of the product, please view the presentation on this website –

“How the ELCOMAX® geotextile makes ELCOROCK® the world’s leading shoreline protection system” It is important to understand the applied forces and how the ELCOROCK® system resists the forces and achieves structural stability and durability over the long-term.

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What makes ELCOROCK® perform?

Geotextile Performance

1. 2. 3. 4. 5. 6. 7.

UV Resistance > 80% strength required after 2,000hrs exposure Abrasion Resistance > 80% strength retained after 40,000 revolutions Damage Resistance > 70% elongation required Fines Retention – testing on specific sands completed with positive results Permeability > 10 times fill material permeability Seam Strength > 70% strength Interface Friction > highest possible friction angle

To understand more, please ask us about the details above or view the presentation on this website “How the ELCOMAX® geotextile makes ELCOROCK® the world’s leading shoreline protection system”

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There are 7 key dimensions that make the geotextile used in the ELCOROCK® system the best solution for the harsh conditions experienced in the coastal environment -

Designing with ELCOROCK®

1. 2. 3. 4. 5. 6. 7.

Wave size and type – comprehensive design curves are available Container size and shape Geotextile factors (as previously mentioned) Scour protection Filling and closure options Pump requirements Handling and placement

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Several inputs require consideration when designing an ELCOROCK® structure:

Maintenance

The ELCOROCK® system has several maintenance benefits, including –

• ELCOROCK® units provide beach-goers with a user-friendly structure that provides great public amenity. (as shown in photo below) • Repair of damaged ELCOROCK® units is simple and easy (repair kits are available, as shown in photo below).

A 2008 government tender estimated maintenance costs for an ELCOROCK® structure at 30% of the structure’s cost over the 15 year design life of the structure – or 2% per annum - which is a very low maintenance cost for coastal structures.

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• “vandal deterrent” ELCOROCK® units provide protection against vandalism, debris, general wear-and-tear etc. (as shown in photo below)

Scour Protection

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Toe scour protection is required • We have developed special flexible toe containers

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There is a need for ‘upstream’ and ‘downstream’ protection • We recommend that the structure is “keyed in”

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The designer needs to address the issue of sand loss through the structure • So we recommend placing a layer of ELC O MAX® geotextile behind and beneath the ELC O RO C K® units as a separation layer (as shown below).

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As with all marine structures:

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Installation is a key element in the construction of an ELCOROCK® structure, to ensure structural stability.

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To assist contractors in this, we have built special filling equipment for the small and medium containers. These units are excavator filled, with the 2.5m³ containers being hydraulically compacted for best results.

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The larger tubes are filled with a sand pump or dredge – with the container size influencing the design of the unit and installation process.

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Installation

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We have installation equipment available to assist contractors in the construction of an ELCOROCK® structure. We also have a list of other equipment required, to ensure the installation process is simple, quick and stress-free.

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We offer on-site supervision to assist in training the work crews in the installation sequences.

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Installation Equipment

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After the ELCOROCK® units are filled, they need to be closed. There are well established closing techniques – including stitching (using supplied sewing machines and yarn) and details to close the trunks (on the large tubes). tubes).

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We can assist in training the crews in closing techniques, or provide detailed installation manuals and sample of closed units for guidance.

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Installation Closure

Installation Placement

The options include – • •

J-bins (using excavator and quick hitch) Modified rock grab (J-bin is preferred)

•

Split hull barge

(using GPS to place the units)

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 After filling and closing the ELCOROCK® units, they need to be placed. The size of the ELCOROCK® units determines how the contractor can place the units.

Coastal Foreshore Seawalls Maroochy Beach

Aspendale Beach

Stockton Beach

Constructed 2001

Constructed 2005

Constructed 1996

2001

2005

2000

2002

2008

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Groynes Russell Heads

Clifton Springs

Maroochydore Beach

Constructed 1993

Constructed 2004

Constructed 2001 & 2003

1995

2004

2001

2000

2005

2008

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Breakwaters & Offshore Structures Narrowneck Reef

Mt Maunganui Reef

Limeburners Breakwater

Constructed 1999

Constructed 2005

1999

2005

2001

2005

2006

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River Bank Protection Berri Ski Boat Club

Constructed 2004

Constructed 2003

Constructed 2005

2004

2003

2005

2007

2003

2008

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Papamoa

Santa Barbara

Conclusion

 ELCOROCK® is an engineered geosynthetic solution for coastal erosion and shoreline protection.

 ELCOROCK® structures are stable and flexible, and adapt to changing site conditions.  Special design and construction techniques are required, and we have the experience and tools available to support your project.  The cost of ELCOROCK® structures is similar to that of a rock structure.  ELCOROCK® structures minimize the environmental impact.  ELCOROCK® structures can create an excellent foundation for a broad diversity of marine life.  The stability and durability of ELCOROCK® structures is well-proven.

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 ELCOROCK® structures have been successfully used to solve a range of coastal challenges for over 25 years in harsh UV environments.

Available Literature 

We have been helping people build ELCOROCK® coastal erosion and shoreline protection structures for over 25 years – and are very happy to share our knowledge with people wanting to protect their local foreshore, coastline or asset.

 • • • • • • • •

If we can assist you with advice, please contact us for – case studies published papers research papers brochures installation details an ELCOROCK® DVD standard specifications preliminary design assistance (or if required, details of experienced

coastal

engineers to perform full engineering design for the project)

We look forward to working with you to develop a solution using the ELCOROCK® coastal erosion and shoreline protection system.

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Contacts

140 Bernard Street, Cheltenham, Victoria, 3192 Australia. Tel: +61-3-8586 9100 Fax: +61-3-8586 9174 E-mail: sales@ geofabrics.com.au Website: www.geofabrics.com.au

Geofabrics International 11 Production Avenue, Molendinar, Gold Coast, 4214 Queensland, Australia. Tel: +61-7-5594 8600 Fax: +61-7-5563 3727 E-mail: exports@ geofabrics.com.au Website: www.geofabricsinternational.com

Geofabrics Australasia manufacturing operation ELCO Solutions Pty Ltd 31 Activity Crescent, Molendinar, Gold Coast, 4214 Queensland, Australia.

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Geofabrics Australasia Pty Ltd