Contract No:
NE/2017/01
Project Title:
Tseung Kwan O – Lam Tin Tunnel
Tseung Kwan O Interchange and Associated Works
Noise Mitigation Plan
Document No: CWSTCMJV/940/CSF/0083-2018
Revision: 00
Date: 12 Mar 2018
NE/2017/01
Tseung Kwan O – Lam Tin Tunnel: Tseung Kwan O Interchange and Associated Works
Noise Mitigation Plan
Rev. 0
Revision History
Revision No. Description Prepared/
Revised By Date
00 First Submission Clarence Yeung 12 Mar 2018
Rev. 0
Noise Mitigation Plan
Document No: CWSTCMJV/940/CSF/0083-2018
Revision: 00
Date: 12 Mar 2018
Prepared and checked by:
Position Signature Name Date
Site Agent David Tung
Deputy Site Agent Yau Ming Hong
Prepared by:
Environmental Officer Clarence Yeung
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Tseung Kwan O – Lam Tin Tunnel: Tseung Kwan O Interchange and Associated Works
Noise Mitigation Plan
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CONTENTS
1. BACKGROUND ............................................................................................................... 3
1.1 PROJECT DESCRIPTION .......................................................................................... 3
1.2 REQUIREMENT FOR NOISE MITIGATION PLAN (NMP) ................................... 3
2. DESCRIPTION OF CONSTRUCTION WORKS IN THE STUDY AREA .................... 4
2.1 NOISE SENSITIVE RECEIVERS (NSRS) ................................................................. 4
2.2 CONSTRUCTION ACTIVITIES ................................................................................ 4
2.3 UPDATED PRELIMINARY CONSTRUCTION PROGRAMME ............................. 4
2.4 UPDATED POWERED MECHANICAL EQUIPMENT LIST .................................. 4
3. RECOMMENDED NOISE MITIGATION MEASURES ................................................ 9
3.1 CONCURRENT CONSTRUCTION WORKS .......................................................... 10
4. CONCLUSION ............................................................................................................... 10
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Noise Mitigation Plan
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LIST OF APPENDIXES
Appendix A Site Layout
Appendix B Construction Programme
Appendix C Catalogue of materials proposed to be used for noise
barrier
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Noise Mitigation Plan
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1. BACKGROUND
1.1 PROJECT DESCRIPTION
To cope with the anticipated transport need, “Further Development of Tseung
Kwan O – Feasibility Study” (the “TKO Study”) recommended the provision of
Tseung Kwan O – Lam Tin Tunnel (TKO-LT Tunnel) and Cross Bay Link (CBL)
to meet the long-term traffic demand between TKO and the external areas.
The Tseung Kwan O – Lam Tin Tunnel is a dual-two lane highway connecting
Tseung Kwan O and East Kowloon. Together with the future Trunk Road T2 in
Kai Tak Development and Central Kowloon Route, it will form the new
strategic route network of Hong Kong providing an East-West Express Link
between Kowloon and Tseung Kwan O.
CW – STEC – CMGC Joint Venture (JV) was commissioned by Civil
Engineering and Development Department (CEDD) as the appointed contractor
for one of the contracts.
The Works to be executed under this Contract included, but not exclusively, the
following items:
i. Construction of marine viaducts forming the Tseung Kwan O Interchange
at Junk Bay;
ii. Construction of 7 bridges and 28 bridge piers with 30 pile caps and approx.
59 piles (including 3 interfacing piers to CBL);
A Site Layout showing the site boundary is shown in Appendix A.
1.2 REQUIREMENT FOR NOISE MITIGATION PLAN (NMP)
In accordance with the condition 2.5 of the EP-458/2013/C, the Permit Holder
shall, no later than one month before the commencement of construction of the
project, submit to the Director of Environmental Protection for approval three
hard copies and two electronic copies of Noise Mitigation Plan detailing the
temporary and permanent mitigation measures for the construction and
operation phase traffic noise impacts arising from the Project. All noise
mitigation measures implemented shall be properly maintained during
construction of the project.
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2. DESCRIPTION OF CONSTRUCTION WORKS IN THE STUDY AREA
2.1 NOISE SENSITIVE RECEIVERS (NSRS)
None of the NSR is identified within the 300m study areas with predicted
residual construction noise impacts as shown in the Appendix A.
2.2 CONSTRUCTION ACTIVITIES
As mentioned in Section 1.1, the construction of TKO interchange and
associated works is covered by this contract. The construction noise impacts of
the Project may arise from the following major construction activities:
Construction of Marine Piling works
Construction of Marine Viaducts works
Construction of Road paving works
These construction activities will involve the use of PME including Cranes,
Concrete lorry mixer, Derrick barge, Generator, Piling - Oscillator, Piling –
Reverse Circulation Drill, Backhoe etc.
2.3 UPDATED PRELIMINARY CONSTRUCTION PROGRAMME
The updated preliminary construction programme prepared by CW – STEC –
CMGC Joint Venture has been used in this NMP and has been presented on
monthly basis for the duration of the construction works in corresponding
worksites.
The construction schedule has been adjusted to minimize concurrent
construction works to be carried out in the vicinity as far as practicable. The
updated preliminary construction programme is provided in Appendix B.
2.4 UPDATED POWERED MECHANICAL EQUIPMENT LIST
The Sound Power Level (SWL) for the PMEs have been adopted from EPD’s
Technical Memorandum on Noise from Construction Work Other than
Percussive Piling (GW-TM), list of SWLs of other commonly used PME or
British Standard BS 5228-1:2009. It should be noted that the PMEs to be
adopted for individual construction activities are provided in the table below.
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Table 2.4 PMEs to be adopted for individual construction activities
Bridge Structure for TKO Interchange
PME TM or other
reference
No. of
PME
Noise
Mitigation
Measures
1.0 Slip Road S300
1.1 Sea Piling Works, Pile Cap & Piers
Air Compressor, air flow > 10m3/min and < 30m3/min CNP 002 1 Barrier
Concrete lorry mixer CNP 044 1
Crane, mobile/barge mounted (diesel) CNP 048 1
Derrick barge CNP 061 5 Barrier
Poker, vibratory, hand-held CNP 170 2
Generator, silenced, 75dB(A) at 7m CNP 102 1 Barrier
Water pump (electric) CNP 281 1
Excavator/loader, wheeled/tracked CNP 081 1
Saw, circular, wood CNP 201 1
Bar bender and cutter (electric) CNP 021 1
Piling, large diameter bored, grab and chisel CNP 164 1
Piling, large diameter bored, oscillator CNP 165 1
Piling, large diameter bored, reverse circulation drill CNP 166 1
Breaker, excavator mounted (pneumatic) CNP 027 1
1.2 Bridge Deck Construction for S300
Generator, silenced, 75dB(A) at 7m CNP 102 1 Barrier
Breaker, hand-held, mass < 10kg CNP 023 1
Derrick barge CNP 061 1 Barrier
Tug boat CNP 221 1
Winch (electric) CNP 262 1
Bar bender and cutter (electric) CNP 021 1
Concrete lorry mixer CNP 044 1
Concrete pump, stationary/lorry mounted CNP 047 1
Poker, vibratory, hand-held CNP 170 2
1.3 Roadworks, Drainage, Utillities for S300
Dump truck, gross vehicle weight > 38 tonne CNP067 1
Asphalt paver CNP 004 1
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Roller, vibratory CNP 186 1
Generator, silenced, 75dB(A) at 7m CNP 102 1 Barrier
Paint line marker CNP 161 1
2.0 Slip road S100 + S200
2.1 Sea Piling Works, Pile Cap & Piers
Air Compressor, air flow > 10m3/min and < 30m3/min CNP 002 1 Barrier
Concrete lorry mixer CNP 044 1
Crane, mobile/barge mounted (diesel) CNP 048 1
Derrick barge CNP 061 5 Barrier
Poker, vibratory, hand-held CNP 170 2
Generator, silenced, 75dB(A) at 7m CNP 102 1 Barrier
Water pump (electric) CNP 281 1
Excavator/loader, wheeled/tracked CNP 081 1
Saw, circular, wood CNP 201 1
Bar bender and cutter (electric) CNP 021 1
Piling, large diameter bored, grab and chisel CNP 164 1
Piling, large diameter bored, oscillator CNP 165 1
Piling, large diameter bored, reverse circulation drill CNP 166 1
Breaker, excavator mounted (pneumatic) CNP 027 1
2.2 Bridge Deck Construction for S100
Generator, silenced, 75dB(A) at 7m CNP 102 1 Barrier
Breaker, hand-held, mass < 10kg CNP 023 1
Derrick barge CNP 061 1 Barrier
Tug boat CNP 221 1
Winch (electric) CNP 262 1
Bar bender and cutter (electric) CNP 021 1
Concrete lorry mixer CNP 044 1
Concrete pump, stationary/lorry mounted CNP 047 1
Poker, vibratory, hand-held CNP 170 2
2.3 Roadworks, Drainage, Utillities for S100
Dump truck, gross vehicle weight > 38 tonne CNP 067 1
Asphalt paver CNP 004 1
Roller, vibratory CNP 186 1
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Generator, silenced, 75dB(A) at 7m CNP 102 1 Barrier
Paint line marker CNP 161 1
2.4 Bridge Deck Construction for S200
Generator, silenced, 75dB(A) at 7m CNP 102 1 Barrier
Breaker, hand-held, mass < 10kg CNP 023 1
Derrick barge CNP 061 1 Barrier
Tug boat CNP 221 1
Winch (electric) CNP 262 1
Bar bender and cutter (electric) CNP 021 1
Concrete lorry mixer CNP 044 1
Concrete pump, stationary/lorry mounted CNP 047 1
Poker, vibratory, hand-held CNP 170 2
2.5 Roadworks, Drainage, Utillities for S200
Dump truck, gross vehicle weight > 38 tonne CNP 067 1
Asphalt paver CNP 004 1
Roller, vibratory CNP 186 1
Generator, silenced, 75dB(A) at 7m CNP 102 1 Barrier
Paint line marker CNP 161 1
3.0 Mainline
3.1 Sea Piling Works, Pile Cap & Piers
Air Compressor, air flow > 10m3/min and < 30m3/min CNP 002 1 Barrier
Concrete lorry mixer CNP 044 1
Crane, mobile/barge mounted (diesel) CNP 048 1
Derrick barge CNP 061 5 Barrier
Piling, vibrating hammer CNP 172 1
Poker, vibratory, hand-held CNP 170 2
Generator, silenced, 75dB(A) at 7m CNP 102 1 Barrier
Water pump (electric) CNP 281 1
Excavator/loader, wheeled/tracked CNP 081 1
Saw, circular, wood CNP 201 1
Bar bender and cutter (electric) CNP 021 1
Piling, large diameter bored, grab and chisel CNP 164 1
Piling, large diameter bored, oscillator CNP 165 1
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Piling, large diameter bored, reverse circulation drill CNP 166 1
Breaker, excavator mounted (pneumatic) CNP 027 1
3.2 Bridge Deck Construction for Mainline
Generator, silenced, 75dB(A) at 7m CNP 102 1 Barrier
Breaker, hand-held, mass < 10kg CNP 023 1
Derrick barge CNP 061 1 Barrier
Tug boat CNP 221 1
Winch (electric) CNP 262 1
Bar bender and cutter (electric) CNP 021 1
Concrete lorry mixer CNP 044 1
Concrete pump, stationary/lorry mounted CNP 047 1
Poker, vibratory, hand-held CNP 170 2
3.3 Roadworks, Drainage, Utillities for Mainline
Dump truck, gross vehicle weight > 38 tonne CNP 067 1
Asphalt paver CNP 004 1
Roller, vibratory CNP 186 1
Generator, silenced, 75dB(A) at 7m CNP 102 1 Barrier
Paint line marker CNP 161 1
2.5 Operation Phases Traffic Noise Impacts
For traffic noise was predicted using the methodology provided in the UK
Department of Transport Calculation of Road Traffic Noise (CRTN) 1988. The
assessment was based on projected peak hour flows for the worst year within
15 years after opening of the road. Road traffic noise levels is presented in
terms of noise levels exceeded for 10% of the one-hour period during the peak
traffic flow, i.e. L10,1hr dB(A). The projected 2036 peak hour traffic flows and
vehicle compositions which have been agreed by Transport Department (TD)
as stated in the EIA report section 4.5.
As mentioned in the section 2.1, none of the NSR is identified within the
300m study area for this project and therefore it is considered the project has
insignificant noise impact to the NSR. As the result, no direct mitigation such
as noise barrier would be needed for the operation phase.
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3. RECOMMENDED NOISE MITIGATION MEASURES
As the construction site is located at TKO Junk Bay area and therefore the noise
mitigation measures can only be placed on the barge which would be located
and stabilize the majority of the PMEs. We suggested adopting the following
mitigation measures for the purpose of reducing the noise impact arise from our
construction activities.
- Use of Noise barrier for noisy plants such as barge, generator etc. Movable
temporary noise barriers that can be located close to noisy plant and be
moved iteratively with the plant. The noise source from the barge mainly is
the operation of the barge’s engine, noise barrier will be erected surrounding
the engine to mitigate the noise. Figure 1 shows the diagram of the erection
of noise barrier on the barge. A typical design which has been used locally is
a wooden/steel framed barrier with a small cantilevered upper portion of
superficial density no less than 1.2kg/m2 on a skid footing. It can reduce
5-10dB(A) at the noise source and in additional, use of full enclosure can
provide about 10 dB(A) noise reduction. The catalogue of materials
proposed to be used for noise barrier is attached in Appendix C.
Figure 1 Diagram of erection of noise barrier on the barge
- The JV will carefully plan the construction activity and locate all the PMEs
as far as practicable to the NSR for the purpose of reducing the noise
impacts to the surrounding environment.
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- Reduce the percentage of using time of plant and equipment as far as
practicable. It would be appropriate to restrict the number of operating PME
within the works area at the same time and therefore reduce the level of
noise impact.
- Regularly maintain the PMEs and plants for ensuring the PMEs are in good
working orders and maximum the use of QPME.
3.1 CONCURRENT CONSTRUCTION WORKS
Until Feb 2018, it is noted that there are three concurrent construction works as
stated below:
Table 3.1 Concurrent Construction Works
Contract No. Project Title
NE/2015/01 Tseung Kwan O – Lam Tin Tunnel – Main Tunnel and
Associated Works
NE/2015/02 Tseung Kwan O – Lam Tin Tunnel – Road P2 and Associated
Works
NE/2015/03 Tseung Kwan O – Lam Tin Tunnel – Northern Footbridge
4. CONCLUSION
In conclusion, since there is no NSR found within the 300m distance as mention
in section 2.1, it would be considered the noise impact generated from the
construction activities is insignificant to the NSR.
However, the JV would adopt and implement the mitigation measures to some
of the PMEs during construction to minimize the noise impact arise from the
construction activities, therefore the works would only have a slight effect to the
NSR (Ocean Shores Block 1) during the construction phase.
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Appendix A – Site Layout
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Appendix B – Construction Programme
Activity ID Activity Name OriginalDuration
Start Finish
NE/2017/01 - TKO-NE/2017/01 - TKO-LTT C6 _180220 1168 10-Jan-18 A 22-Mar-21
Contract DateContract Date 1168 10-Jan-18 A 22-Mar-21
Contract DateContract Date 12 10-Jan-18 A 22-Jan-18 A
CD000001 Contract Date 0 10-Jan-18 A
CD000003 Start Date 0 22-Jan-18 A
Key DatesKey Dates 0 22-Mar-21 22-Mar-21
KD1000110 Completion date for the whole of the works 0 22-Mar-21*
Planned Completion Planned Completion Dates 173 30-Jul-20 19-Jan-21
PreliminariesPreliminaries 1105 11-Jan-18 A 19-Jan-21
Method Statement Method Statement and Shop Drawing 442 26-Feb-18 13-May-19
Contractor's AlternContractor's Alternative Design (AD) 403 23-Jan-18 A 01-Mar-19
Procurements & SProcurements & Subletting 752 26-Feb-18 18-Mar-20
Regular SubmissioRegular Submission / Issue 1073 12-Feb-18 19-Jan-21
Construction WorksConstruction Works 796 16-Apr-18 16-Dec-20
Temporary Platform Temporary Platform and Ground Investigation 433 16-Apr-18 27-Sep-19
Erect Temporary PlaErect Temporary Platform 130 16-Apr-18 18-Sep-18
Ground InvestigatioGround Investigation Works 423 27-Apr-18 27-Sep-19
Bore Pile ConstructioBore Pile Construction (59nos) (Including plant moblization) 442 03-Jul-18 23-Dec-19
Bore Pile ConstructBore Pile Construction at Bridge ML 198 03-Jul-18 28-Feb-19
Bore Pile ConstructBore Pile Construction at Bridge S200 260 05-Dec-18 23-Oct-19
Bore Pile ConstructBore Pile Construction at Bridge S300 439 06-Jul-18 23-Dec-19
Bore Pile ConstructBore Pile Construction at Bridge S100 140 13-Apr-19 03-Oct-19
Pile Cap ConstructionPile Cap Construction 534 23-Jul-18 12-May-20
Pre-cast Shell CastPre-cast Shell Casting 390 23-Jul-18 13-Nov-19
Pre-cast Shell InstaPre-cast Shell Installation (After Bore Pile Testing) 443 09-Nov-18 12-May-20
In-fill Pour to Pile CIn-fill Pour to Pile Cap 418 24-Nov-18 25-Apr-20
Pier ConstructionPier Construction 358 04-Mar-19 20-May-20
Pier Construction atPier Construction at Bridge S100 127 09-Nov-19 16-Apr-20
Pier Construction atPier Construction at Bridge S200 238 13-Jul-19 02-May-20
Pier Construction atPier Construction at Bridge S300 358 04-Mar-19 20-May-20
Pier Construction atPier Construction at Bridge ML 227 06-Mar-19 07-Dec-19
Pier Head Segment Pier Head Segment Construction 344 26-Jun-19 20-Aug-20
Precast Pier Head SPrecast Pier Head Segment Installation 330 26-Jun-19 04-Aug-20
Cast-in-situ DiaphagCast-in-situ Diaphagm 343 27-Jun-19 20-Aug-20
Segment ErectionSegment Erection 342 28-Aug-19 21-Oct-20
Bridge Furniture InstBridge Furniture Installation 168 29-May-20 16-Dec-20
Remaining worksRemaining works 142 31-Jul-20 19-Jan-21
-1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2
2018 2019 2020 2021
MilestoneWorksSummary
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Construction Programme
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Appendix C – Catalogue of materials proposed to be used for noise barrier