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 |