Ground-Borne Noise
Monitoring for TBM
3.1
In the EIA, it is predicted that the
construction groundborne noise are well below the NCO criteria such that mitigation
measures are not required. In order
to ensure proper control of groundborne noise is executed by the contractor, a
groundborne noise monitoring is recommended at the critical NSR for assurance
checking. Background groundborne noise shall be measured inside the NSR before
the operation of TBM or vibration construction activities. Impact groundborne
noise shall be monitored at the NSR when the TBM head is operating underneath
the selected NSR. Critical NSR are summarized in the following table 3.1. Construction ground-borne noise
monitoring plan shall be provided by the ET and submitted to IEC and EPD for
approval before operation of TBM.
Table 3.1 Construction
Ground-borne Noise Monitoring Location
Monitoring Location |
Function |
Kian Nan Mansion, 81-85
Bonham Strand West |
Residential |
|
Residential |
|
Church |
|
Educational Institution |
|
Educational Institution |
|
Residential |
|
Residential |
3.2
Trackform mitigation is required after detail assessment. In order to ensure
no adverse impact generate from the operation of train. It is recommended the
ET should perform a noise commissioning test at selected key noise sensitive
receivers including at least but not limited to the NSR in the above table
prior to operation of the project.
A summary of the operational groundborne noise criteria for the
groundborne noise sensitive receivers is given in the following table:
Table 3.2 Operational
Ground-borne Noise Criteria
|
Ground-borne Noise Criteria,
dB(A) |
|
NSR Description |
Day & Evening |
Night |
School – Classrooms |
55 (Leq 30 mins) |
- |
Domestic premises |
55 (Leq 30 mins) |
45 (Leq 30 mins) |