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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


Rev. 0

Revision History

Revision No. Description Prepared/

Revised By Date

00 First Submission Clarence Yeung 12 Mar 2018

Rev. 0


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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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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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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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


Breaker, hand-held, mass < 10kg CNP 023 1


Tug boat CNP 221 1

Winch (electric) CNP 262 1



Concrete pump, stationary/lorry mounted CNP 047 1


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


Paint line marker CNP 161 1

2.0 Slip road S100 + S200




















Tug boat CNP 221 1







Dump truck, gross vehicle weight > 38 tonne CNP 067 1



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Tug boat CNP 221 1












3.0 Mainline






Piling, vibrating hammer CNP 172 1









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3.2 Bridge Deck Construction for Mainline




Tug boat CNP 221 1






3.3 Roadworks, Drainage, Utillities for Mainline






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

NE/2017/01 Tseung Kwan O - Lam Tin TunnelTseung Kwan O Interchange and Associated Works

Construction Programme

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Appendix C – Catalogue of materials proposed to be used for noise barrier

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