SOUTH PUMICESTONE REHABILITATION AND SEAWALL RENEWAL

 

CLIENT: MORETON BAY REGIONAL COUNCIL

DATE OF COMPLETION: SEPTEMBER 2013

WORK SCOPE:

  • REMOVAL OF EXISTING SHORELINE PROTECTION, EXCAVATION TO REAR OF SEAWALL

  • INSTALLATION OF GROUND ANCHORS TO TIE BACK EXISTING SEAWALL

  • INSTALLATION OF VINYL SHEETPILES TO TOE OF EXISTING WALL

  • FORM AND CAST CONCRETE TO NEW BOTTOM STEP

  • ROCK BEACHING AND PROTECTION TO CULVERT OUTFALL

  • BEACH NOURISHMENT 

PROJECT DRAWINGS: SOUTH PUMICESTONE REHABILITATION

 

 

 

 

 

ANTI SCOUR ROCK PROTECTION 

 

 

Geotextile material placed under rock to avoid sinking

Armour rock being placed

Geotextile material placed under rock to avoid sinking

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Excavation for sheet pile installation

Installing Sheet piles for concrete step

Finished vynal sheet pile culvert

Excavation for sheet pile installation

1/11

Vinyl Sheet pile installation

Equipment used:

  • 7.8t excavator for excavation

  • Sheet Pile Vibrator

Application: 

  • Support for new seawall footing

  • Prevents scour of sand behind the wall

 

 

Anchors guides setup

Installation of ground anchor

Locking anchor off into existing seawall

Anchors guides setup

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Ground anchor installation

Equipment used:

  • 7.8t excavator for excavation

  • 4t excavaator with rock hammer

  • 30t jack for post instalation tensioning

  • 5t jack for lock off loads

Application: 

  • Support for existing seawall

  • Prevents longditudinal moment

 

Vibrating concrete through rock

Installing bund wall for culvert

Installation of sheet pile bund wall to allow longer working times

Vibrating concrete through rock

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Concreting in the inter tidal zone

Works Completed:

  • 120m and 105m sections of two teir step

  • Culvert base with 500mm of rock

Solutions to tidal interference: 

  • Sheet pile bund wall to allow longer working times

  • Organisation of work around out going tides