Table 4.6        Movable Noise Barrier for Certain Items of PME

Construction Task

PME for which Movable Barrier is Adopted

Barrier Correction, dB(A)

Site Clearance

 

Excavator

5

Excavation

 

Excavator

5

Hydraulic Breaker, Generator and Drainage Pump

10

Backfilling/Channel lining

 

Excavator and Concrete Lorry Mixer

5

 

 

Vibratory Poker

10

Box Culvert

Piling

Oscillator

10

 

Earthworks

Excavator

5

 

 

Hydraulic Breaker, Generator and Drainage Pump

10

 

Reinforcement Fixing / Concrete operations

Crane and Concrete Lorry Mixer

5

 

 

Vibratory Poker and Bar Bender/Cutter

10

 

 

Backfilling

Excavator

5

Low Flow Diversion Pipes and bund

 

Crane and Concrete Lorry Mixer

5

 

 

Vibratory Poker and Bar Bender/Cutter

10

U-Channel Construction

 

Excavator and Mini-Excavator

5

 

 

Hydraulic Breaker and Compactor Rammer

10

Gabion Channel

 

Excavator

5

 

 

Vibratory Roller, Generator and Drainage Pump

10

Widening of Bottleneck

 

Excavator

5

 

 

Generator and Drainage Pump

10

Retaining Wall-L/T Shape

 

Crane and Concrete Lorry Mixer

5

 

 

Power Rammer, Vibratory Poker, Bar Bender/Cutter, Generator and Drainage Pump

10

Retaining Wall-Mini Bored Pile Wall

Installation of Temporary Works

Crane

5

 

 

Systemised Pilling Machinery, Generator, Drainage Pump, Grout Mixer, Grout Pump and Vibratory Poker,

10

 

Earth Wall

Excavator

5

 

 

Hydraulic Breaker, Generator and Drainage Pump

10

 

Reinforcement Fixing/Concrete Operations

Concrete Lorry Mixer

5

 

 

Generator, Drainage Pump Vibratory Poker and Bar Bender/Cutter

10