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Castle Peak Cable Tunnel
Atkins is responsible for the scheme design and construction supervision for the Castle Peak Cable Tunnel. This is a 4.5km long utility tunnel designed to house eight 132kV cables, and is being constructed between Castle Peak and Tsuen Mun, below mountainous terrain using a hard rock TBM. The internal diameter of the tunnel will be 4.5m. Precast concrete segments are being used as the tunnel lining. Due to the high rock cover and associated groundwater pressure, both drained and undrained linings are being utilised. The tunnel will pass through both granitic rock and the Tsuen Mun formation, which are separated by a large faulted zone. |
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Dubai Metro Green Line
The 17.6km long Green Line is the second line of the Dubai Metro to be constructed. Atkins is employed as the Contractor's designer for the Green Line, which includes 6 underground stations, 7km of TBM and 1000m of cut-and-cover tunnel. Atkins' Hong Kong office is responsible for the design of the 27m deep cut-and-cover tunnel sections (constructed using bottom up methods), two underground stations and three emergency escape shafts. We are also responsible for the design of the bored tunnel, which will be constructed using a 9.56m diameter EPB TBM. |
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KCRC – Kowloon Southern Link Contract No. KDB200 – West Kowloon Station and Tunnels, Jordan Road to East Tsim Sha Tsui Station
Atkins is the Independent Checking Engineer for the Link 200 JV responsible for the Design and Construction of this project. The works include 1.3km of tunnels, constructed using a combination of cut-and-cover and Slurry type TBM. The TBM element includes two 1.1km long drives of the 8m diameter TBM. In addition to the tunnels, Atkins is also responsible for checking the design of the 400m long West Kowloon Station (cut-and-cover construction) and two emergency access/egress shafts. Atkins' multidisciplinary team for this work includes specialists in geotechnical, structural, drainage, highways, railway, architectural and E&M. |
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KCRC Contract No. DB320 West Rail Phase I –
Tsing Tsuen Tunnels
The 3.6km long Kwai Tsing Tunnels form a key component of the KCRC West Rail Project which serve the Western New Territories of Hong Kong . Atkins led the design team commissioned by DZJV to undertake the successful tender design and the detailed design for all aspects of the project including geotechnical, tunnelling, civil, structural, architectural, electrical and mechanical and system safety. The Tsing Tsuen Tunnel section comprised two number of 8.75m diameter TBM drives, each 1.8km long. The contract was awarded on the basis of an alternative design proposal of using a mixed ground Earth Pressure Face Balance (EPB) machine, the first use of a large scale EPB TBM in Hong Kong . |
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KCRC East Rail Extension Contract No. LDB201 – Sheung Shui to Chau Tau Tunnels
Atkins was the Independent Checking Engineer (ICE) for the Dragages (HK) Joint Venture for the HK$2.8Billion Design and Construction of KCRC Contract LDB201 - Sheung Shui to Chau Tau Tunnels. This 4.3 km tunnelling project forms part of the KCRC Lok Ma Chau Spur Line which is required to relieve congestion of the Lo Wu Station boundary crossing between Hong Kong and Mainland China . A combination of cut-and-cover and Earth Pressure Balance (EPB) Tunnel Boring Machine (TBM) tunnel was being constructed. The tunnel option for this railway alignment was selected in order to minimise the impact on the environmentally sensitive area of Long Valley . |
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Contract for CLP Power Tunnelling Projects Consultancy Services – Tsz Wan Shan Cable Tunnel
In March 2001 Atkins was awarded the consultancy services agreement for four cable tunnels by the CLP Power Hong Kong Ltd. Atkins provided preliminary and reference design, and construction supervision for these projects which were constructed under design-and-build contracts.
The 650m long, 3.2m I.D. Tsz Wan Shan Cable Tunnel was constructed using the same Bessac TBM as used for Tuen Mun Cable Tunnel. As the tunnel vertical alignment was selected to be above rockhead, the horizontal alignment was limited, with more than 80% of the alignment curved (minimum radius of 160m). |
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Contract for CLP Power Tunnelling Projects Consultancy Services – Tuen Mun Cable Tunnel
Tuen Mun Cable Tunnel was the second of the four design and build tunnels under the CPL Power Tunnelling Projects Consultancy. The scheme comprised a 3.2m I.D, 200m long constructed below Tuen Mun River . The Tuen Mun Cable Tunnel was constructed using a pressurized face “Bessac” TBM (3.79m O.D.) (subsequently used on Tsz Wan Shan Cable Tunnel). Ground conditions included soft clays with 20m of water pressure. The tunnel was lined with precast concrete segmental rings, concurrent with the tunnel excavation. Atkins provided preliminary and reference design, and construction supervision for this project. |
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Contract for CLP Power Tunnelling Projects Consultancy Services – Chi Ma Wan Tunnel
The Chi Ma Wan Cable Tunnel consists of a 3.3m diameter, 3200m long tunnel running from Tai Long to Pui Wo. The alignment passes below mountainous terrain, with cover above the tunnel in excess of 250m. The tunnel was excavated using a hard rock TBM. Pregrouting ahead of the excavation was carried out based upon the results of probe drilling. The tunnel was generally unlined, with support provided as dictated by the results of rock mapping. Support was permanent rock dowel, mesh and steel channels, with localized linings (incorporating permanent drainage measures and shotcrete) provided in a limited number of locations to ensure the permanent water ingress limits achieved. |
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Tolo Harbour Effluent Export Scheme
This Scheme was designed to reduce pollution in Tolo Harbour . Stage I of the scheme involved a 7.4km long gravity tunnel, constructed using a double shielded 3.56m diameter hard rock TBM, with precast segmental lining. The machine cut through hard granite at record speeds of 43m/day and 209m/week, exceeding that normally achieved by drilling and blasting. Atkins in association with Balfours International ( Asia ) Consulting Engineers Ltd. provided a full range of consultancy services for the project from planning and feasibility studies through detailed design and tender evaluation to construction supervision. |
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Underground Power Transmission System -
Nam Fung Road to Mount Parker
This project was undertaken by Atkins to provide an underground power cable system for distribution of power from the Lamma Island power station to the eastern part of the Hong Kong Island . Works included constructing a cable tunnel through 5.4km of hard granite rock and 120m of soft ground, passing under Mount Nicholson , Mount Butler and Mount Parker . As the Geotechnical and Tunnel Consultant for this project, Atkins was responsible for the feasibility study, site investigation, design, design submissions and approvals documentation, tender evaluation, construction supervision and detailed tunnel logging and support installation. |
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Gas Pipeline from Braemar Hill to Wong Nai Chung Gap
This project involved the construction of a 2.6km long, medium pressure gas pipeline from Braemar Hill to Tai Hang Road , and an associated pressure reduction station. For environmental and other reasons, the pipeline was built within a 3.35m diameter bored rock tunnel for most of its length and a hard rock TBM was used for excavation of the tunnel. Atkins, in association with Acer Consultants (FE) Ltd., provided a full range of consultancy services for this project from planning and preliminary design through detailed design and tender evaluation to construction supervision. |
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