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

press to zoom

press to zoom

Armour rock being placed

press to zoom

Geotextile material placed under rock to avoid sinking

press to zoom
1/8

Excavation for sheet pile installation

press to zoom

Installing Sheet piles for concrete step

press to zoom

Finished vynal sheet pile culvert

press to zoom

Excavation for sheet pile installation

press to zoom
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

press to zoom

Installation of ground anchor

press to zoom

Locking anchor off into existing seawall

press to zoom

Anchors guides setup

press to zoom
1/5

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

press to zoom

Installing bund wall for culvert

press to zoom

Installation of sheet pile bund wall to allow longer working times

press to zoom

Vibrating concrete through rock

press to zoom
1/6

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