MARINA BAY SANDS

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Earth Control Measures at
MARINA BAY SANDS IR DEVELOPEMENT
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Project Detail
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Site Location
Marina Barrage
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Site Location
Marina Bay Sands IR
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Earth Control Measures Layout
Water Treatment System
One discharge Point
Water Storage Pond
Sheares Avenue
Silt Trap
Perimeter Cut-Off Drain with Silt Fence on both
sides
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Earth Control Measures Implementation
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Earth Control Measures Implementation
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Earth Control Measures

• Earth Control measures at construction site is
  of greater urgency and importance now as
  Singapore has to harness every drop of water so
  that Singaporeans can enjoy clean, clear water
  and a healthy environment.

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Erosion Control

• much easier and more cost effective to prevent
  erosion than to trap sediments
• earth work shall be sequenced and scheduled in
  stages and progressively to minimize bare earth
  surfaces.
• All construction access and bare surfaces shall
  be paved up with concrete or milled waste or
  other suitable materials.
• To turf up bare surfaces immediately in an
  earthwork if there is no subsequent construction
  activities.
• All bare slopes shall be protected with
  cemetitious spray, close-turfing or erosion
  control blankets.
• All earth stokepiles shall be protected by canvas
  sheet or erosion control blanket.

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Sediment Control

• To provide concrete lined cut off drains along
  the perimeter of the construction sites.
• To provide sit fence properly installed and
  embedded onto the ground along the perimeter
  cut-off drains
• Intermediate silt traps shall be installed for
  every 30 metres along the perimeter lined cut-off
  drain.  
• To provide sedimentation basins along the
  perimeter cut off drains and before discharge
  points into public drains.

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Estimation of Surface Runoff
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Estimation of Discharge Capacity
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Rainfall Intensity
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No of Wet days a year
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Estimation of Sediment yield
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Parameters adopted
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Estimation of Soil Erodibility
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Wheel Wash at Main entrance
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Water treatment system provided at wheel wash
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Perimeter cut off drain
Concrete lining
Silt fence
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Silt Traps
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After exvavation, all rainwater will be retain at
basement
Concrete lining at slope
Diaphragm wall completed
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Existing turfing to be retained
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Main Water holding area before treatment
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Water Treatment System
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Discharge of Slurry after water treatment
Slurry discharged to slurry collection area
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Discharge of water to existing canal after
treatment
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Discharge of water to existing canal after
treatment
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The discharge into the storm water drainage
system shall not contain Total Suspended Solids
in concentrations greater than 50 milligrams per
litre of the discharge.
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Continuous monitoring will be implemented on site
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Regular Maintenance
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Existing drain within construction site
maintained regularly
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Maintenance Programme

• Regular checks on the ECM that have been put in
  place
• The checks including the
• inspection of slope, drain, erosion blanket,
  silt fence, curb inlet sediment barrier, sediment
  tank.
• Damage, choke or any problem which cause
  ineffectiveness should be recorded and reported.
• The washing bays with sump pump at all
  entrances/exits must be also properly maintained.
  
• Servicing repair required for the ECM should be
  looked into and immediate necessary
  repair/service or improvement should be carried
  out with urgency.

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Increase in composition fines

• Regulation 4
• TSS gt50mg/l
• 1,000 and
• 2,500 in the case of a second offence

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CHECKLISTFORMAINTENANCE OFEARTH CONTROL
MEASURES
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• THANK YOU . . . .