LARGE SPAN

LARGE SPAN HIGHWAY TUNNELS FOR ROUTE - 9


Client:  Scott Wilson/PBA for preliminary design, Atkins China for Feasibility Studies.

Tunnel Works: Three sets of twin bored 3-lane highway tunnels are both to be built for the Route 9 project namely:

Nam Wan Tunnel - located on Tsing Yi, this 1.5 km long, 16m span tunnel will be excavated close to the Cheung Ching Tunnels (Route-3) in mixed granitic and volcanic rocks.

Eagles Nest Tunnel - this 2.1km tunnel will be excavated in granites close to Butterfly Valley and many WSD installations.

Sha Tin Heights Tunnel - this 0.9km tunnel is located close below the Tai Po Highway and a major fault (Tolo Fault).

Est. Construction Cost: US$1B.

Completion Date:  2007

Backanalysis from Cheung Ching Tunnel on Tsing Yi (Route 3): The centre chart shown opposite illustrates a clear relationship monitored between advance rates achieved by drilling and blasting such 3-lane highway tunnels and tunnelling costs for different rock classes according to the IMS Ground Classification System.

Upper Illustrations: Courtesy of Highways Department

BORED TUNNELS FOR KCRC WEST RAIL

BORED TUNNELS FOR KCRC WEST RAIL

Client:  Atkins China Ltd. (ACL) / KCR Corporation

Responsibilities:   Project management services for preliminary design of bored tunnels for consulting engineer.

Works:  1.7km long Ha Kwai Chung (multiple) Tunnel; 1.8km long Tsing Tsuen Tunnel;  120m long Cut and Cover Tunnel and a 5.5km long 13.8 dia. Tai Tam Tunnel.

Construction Cost:   US$ 454M

Completion Date:   2003

 

Top:  Layout and Sections of Kwai Tsing Tunnels

Top:  Construction of Tai Lam Tunnel showing waterproof membrane, ventilation duct and conveyor belt.

Top:  Hard Rock EPBM used by Dragages et Traveaux Publics for construction of Tsing Tsuen Tunnel.

Illustrations:  Courtesy of KCRC

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TAI PO TO BUTTERFLY VALLEY AQUEDUCTS

TAI PO TO BUTTERFLY VALLEY AQUEDUCTS

Client:  Leighton Kumagai JV/WSD

Responsibilities:   Consultants bid and detailed design manager, than advisory role for construction and commercial matters for TBM performance, probing and water inflow management in tunnels.

Works:  12km long 3.8 dia steel and lined treated aqueduct, two deep shafts, 1.7 km of 4m dia. raw water tunnel, two pipejacked road crossing and various water supply facilities.

Construction Cost:   US$ 140M

Completion Date:   2001

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Top:  High Performance Robbins 3.8 dia. TBM, one or two hard rock TBMs used to excavate this 12km long TW aqueduct.

Left:  Technical Innovation - hand built steel segmental shield dragged into position by open TBM in fault zone.

STRATEGIC SEWAGE DISPOSAL SCHEME

STRATEGIC SEWAGE DISPOSAL SCHEME

Client:  Paul Y - SELI JV Contract DC/96/17

Responsibilities:   Pretender evaluation of TBM performance and water inflows, methods of water and ground control, programme and costs. On site advisory services for maximizing TBM performance and minimizing downtime.

Tunnel Works:  Total 23.6 km of deep bored tunnel at about - 120m P.D. with 9 shafts. Contract DC/96/17 - 4.83km at 3.2m excavated diameter in granites and volcanic tuffs; and 5.33km at 4.0m in granites and tuffs, both partly subaqueous.

Construction Cost:   US$ 98M (Contract DSD/96/17)

Completion Date:   2001

Water inflow from advance probing in wettest sections of volcanic tuffs.

  IMS Rock Class Vs Water Inflow Rate

TUNNELS FOR MTR's TSEUNG KWAN O EXTENSION

TUNNELS FOR MTR's TSEUNG KWAN O EXTENSION

Client Hyder Consulting/MTRC

Tunnel Works:   C603 Black Hill: 8.1km at 6.3m dia. with turnouts, C611 Pak Shing Kok: 6.5km @ 6.3m dia. with cavern crossover; C612 Lam Tin: 1.2km @ 6.3m dia.

Responsibilities:   Geotechnical Assessments, preliminary design and construction planning for bored tunnel works.

Construction Cost:   US$ 160M

Illustrations:  Courtesy of MTRC

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Top: Eastern Portals for C603 Black Hill Tunnel - Yau Tong to Tiu Keng Leng.

Illustrations: Courtesty MTRC

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Top:  Option Studied for future platform tunnel at Pak Shing Kok Station.

Geological conditions:

C603 & C612:  massive granites

C611:   Fractured volcanic tuffs

TUNNELLING MACHINES

TUNNELLING MACHINES FOR SOFT & MIXED GROUND

Below:   IMS carried out investigations of interaction of ground settlement and EPB pressures using the TBM below for C705 Singapore MRT NE Line for Kumagai-Sembawang JV. This data was used for a 5km EPB drive for contract T-03 of the Singapore Deep Tunnel Sewerage System.

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Left:  Risk assessment and other engineering studies were carried out by Dr. McFeat -Smith for tunnels for the Athens Metro where two of these 9.8m dia. single shielded TBMs encountered mixed face tunnelling conditions.

Below:   Detail of segmental lining system designed by IMS for use with two EPB tunnelling machines for the Guangzhou Municiple Construction Co. for a successful tender for the Northern Contract, Line 2, Guangzhou Metro in 2000.

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