The
International Tunnelling and Underground Space Association: The ITA Tunnelling
Awards’ Winners finally revealed
Lausanne,
11th of November 2016.- After a one-day technical conference dealing with
innovation and productivity in tunnelling, followed by a one-day awards
conference, the ITA Tunnelling Awards’ judges have revealed their choices and
awarded 8 outstanding projects and also the Young Tunneller of the Year and
someone’s Life Time Achievement. After a detailed examination process the 100
candidacies were reduced to 30 finalists. The latter had the chance to go on
stage to argue and support their projects in front of the whole Tunnelling
Industry…and the winners are:
• The major project of 2016 (exceeding €500m): THE NEW
GUANJIAO TUNNEL ON QUNGHAI TIBET RAILWAY (CHINA)
The
New Guanjiao Tunnel is a key project of the second line of Xining-Golmud
section of Qinghai-Tibet Railway with a total length of 32.690km. The tunnel, a
two-set single-track tunnel with an average elevation of 3400m, operates with
freight and passenger electrified railway with a design speed of 160km/h, and
with overall consideration, borehole- blasting method has finally been chosen.
The construction stage began on 6thNovember, 2007 and the tunnel was opened up
for operation on 28thDecember, 2014.The total investment is 4.96 billion RMB.
• The tunnelling project of the year 2016 (from €50m to
€500m): DOWNTOWN LINE STAGE 3 CONTRACT 937 CONSTRUCTION
OF FORT CANNING STATION AND TUNNELS IN
SINGAPORE (SINGAPORE)
As
Singapore’s underground space becomes more congested with various competing needs; such as underground
basements, utilities tunnels and metro
infrastructures, the construction of new underground metro lines has correspondingly become more
challenging, complex and pushing the boundaries of engineering. This tunnelling
project encountered many challenges such as cutter head interventions to remove
foundations of buildings, close proximity to national monuments and in-service
metro lines with only 1m separation. the tunnelling at such close proximity to
the ’live’ tunnels, which carry hundreds of thou- sands of commuters daily,
poses exceptional high risk. This project has since been successfully completed
with no disruption to any community partners.
• The outstanding tunnelling project of the year (up to
€50m): CHONGQING HONGQIHEGOU METRO STATION (CHINA)
Chongqing
Hongqihegou metro station is a transmitting one for line 3 and line 6 in
Chongqing, china. The station is located in busting area of Chongqing, and
under the main road to airport, where there are many buildings around. It is
built in moderately weathered sandstone and moderately weathered sandy
mudstone.
The
minimum cover thickness of the overburden strata of the project is 8.6m, and
the rate of overburden to span is 0.4. Its maximum excavation section is 760m. The concept of the “inner rocks”
and the “inner rocks supporting” tunneling method were put forward in the
project. The whole tunnel section
is divided into four drifts. Two are on the top and another two in the bottom
to be excavated. In this way, four drifts can be driven simultaneously. By
using the inherent bearing capacity of «inner rocks supporting», the horizontal
and vertical temporary support of the tunnel is saved. Moreover, the
“time-space” effect is controlled precisely for the safety of the force transmitting
between primary support and final lining.
• Renovation/upgrading project of the year: VAUXHALL STATION
UPGRADE PROJECT (UNITED KINGDOM)
London underground’s (LU) Vauxhall
station upgrade will soon provide step free
access for tube users, constructed by Bechtel Ltd. as the main contractor, designed by Gall Zeidler Consultants
in a design-build contract, with tunnelling works
carried out by joseph Gallagher Ltd. the project team changed the refe- rence design to a complete SCL design to
provide a more efficient construction program
and reduce ground move-ments.
A
more economical reinforced concrete collar was designed, rather than
traditional steel lintel beams installed to support new openings in the
existing platform tunnels with steel props. These eliminated health and safety
risks associated with the installation of heavy steel framing and encroachment
onto platform clearance. From the design phase, the project team engaged the
owners of the St. George’s wharf, a high-rise building next to the site, and
integrated a design review by their appointed engineer.
A
potential damage assessment (PDA) and real-time instrumentation and monitoring
program formed the integral part of the assurance process. The project has
successfully increased existing station capacity without fundamentally altering
the operational station. A LU representative confirmed above by stating “With
close collaboration between the LU project, the contractor and the station, the
tunnelling works were completed with minimal disruption to station operations and local residents.” value added
was in the elimination of utility relocation, which cut the construction
duration by at least 6-months. Early third-party outreach efforts led to a
smooth approvals process during the design and construction phases. The SCL
approach aided to the nearly €12m in total cost savings.
• The technical innovation of the year: LARGE DIAMETER SHIELD TUNNELLING IN PURE
SANDS WITH HYBRID EPB SHIELD
TECHNOLOGY (BRAZIL)
The
shield-driven tunnel of metro line 4 in Rio de Janeiro (Brazil) has an
approximate length of 5.2 km. the excavation was performed using a hybrid earth
pressure balance shield with an excavation diameter of 11.51 m and passed through complex geology that included
a long stretch of pure sand bounded
by two stretches of hard, highly abrasive rock. Considerable reduction in
materials, for conditioning consumables, and energy of power consumption were
achieved with this hybrid EPB technology.
• The environmental initiative of the year: THE EMSCHER
PROJECT - BACK TO NATURE! (GERMANY)
The Emschergenossenschaft in Essen
is currently progressing one of the largest environmental projects in the
world, namely, the restructuring of a whole river system. This system has been
used as an open wastewater transport system for
more than 100 years as a consequence of extensive coal mining activities. After 2020 the whole river Emscher, (total
catchment 865 square-kilometers) will be transporting clean water again. To
reach this target, it will be necessary to build a large 51 km long,
underground sewer from Dortmund to Dinslaken, through a densely populated
conurbation. This central Emscher sewer will have diameters varying between
1600 and 2800 mm at depths between 25 and 40 meters below the surface. Shafts
will be constructed at up to 1200 meter intervals. Three large pumping
stations, up to 48 meters in diameter, will lift the wastewater from the
Emscher sewer into the existing treatment plants. The largest section of the Emscher
interceptor is called lot 30. In early 2012, its construction was awarded to
Wayss & Freytag ingenieurbau. The contract requires the construction of
about 47 km of sewer tunnels. In addition to the tunnels, more than 100
construction pits have to be excavated, from which the tunnels will be driven
by pipe jacking. In October 2015, tunnelling was successfully completed
ensuring that upon project completion, the whole river Emscher will be free of
wastewater and can be returned to its natural state with ecologically
redesigned rivers and new recreational areas.
• Safety initiative of the year: ABSIS (ACTIVITY BASED
SAFETY IMPROVEMENT SYSTEM) (SINGAPORE)
Cable
Tunnel project involves the construction of the 35km long tunnel, averaging 60m
deep to house the 400kV and 230kV transmission cable. ABSIS is introduced in this project as a
systematic approach to address safety issues in various critical tunnelling
activities. It is a platform where work activities are captured in a video. By
viewing the video footage of themselves carrying out the works, the workers, without any language barriers, are
able to see for witness the safety lapses they subject themselves to, as well
as the good practices they achieve, but also can adopt.
• Innovative use of underground space: JURONG ROCK CAVERNS
(SINGAPORE)
Jurong
rock caverns (JRC) are located on Jurong Island and is Southeast Asia’s fi the storage of liquid hydrocarbons
such as crude oil and condensate. “JRC”
located 150 meters below the ground is able to optimize land use by saving up
to 60ha of aboveground land, ensuring safety and security of the products in
storage whilst reinforcing Singapore’s position as a leading energy and
chemicals hub. With its successful completion, JTC and Singapore is well positioned to explore more
innovative solutions to further promote Singapore’s economic growth.
• The Young Tunneller of the Year: MR. DEREK ENG
Derek
Eng studied civil engineering, professionally trained in the field of
tunnelling, vocationally called to empower young engineers and tunnellers using
his hard-gained experiences and knowledge. He currently works as an assistant
manager in the tunnel department for MMC GAMUDA KVMRT (T) Sdn Bhd., a notable
Malaysian based company and the main contractor for the underground stations
and tunnel constructions for mass rapid transit project. Derek’s journey in his
career thus far, has grown and moved beyond just
the technicalities of tunnelling, focusing a lot on providing professional
training related to tunnelling and inspiring young school leavers to take up
engineering as the career of choice.
• Lifetime Achievement: Dr. MARTIN HERRENKNECHT
Martin
Herrenknecht received the Lifetime Achievement Award for his remarkable
contributions in Tunnelling. After studies at the Konstanz University of
Applied Sciences, from which he was diplomed in 1964, he founded his own
company in 1975, specialized in Tunnel Boring Machines. In 2010, Herrenknecht
AG, his company, was recognized for drilling the largest tunnel in the world.
He also took part in the rewarded Eurasia Tunnel Project, elected Major Project
of the Year 2015. About the
International Tunnelling and Underground Space Association:
The
International Tunnelling and Underground Space Association (ITA) is a
non-profit and non-governmental international organization, which promotes the
use of underground space for a solution to sustainable development. Founded in
1974 and operating out of Lausanne, Switzerland, ITA currently associates 73
Member Nations, 300 affiliated members, 17 Prime Sponsors and 60 supporters, as
well as individual members.
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