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World Tunnelling Congress
WTCThere are 1984 documents.
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Execution of Contact and Consolidation grouting in 162.5m deep, 38m dia Surge Shaft of RHEP-412 MW, HP (India) – A...
Abstract: Hydro power projects developed in mountainous regions throughout the world envisages construction of underground water conductor system and Surge shafts. In India these are generally constructed by using conventional drilling and blasting methods for excavation. During excavation of cavity, surrounding rock gets disturbed with blasting and there is sometimes cavity/crack formation/opening of...
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Estimating of Groundwater Inflow into the Sabzkuh Tunnel (Сhaharmahal and Bakhtiari)
Abstract: Average rainfall of Iran is 252 mm (one-third of the world average). On the other hand, in most areas of Iran, it usually rains when there is no need to water for agriculture; besides, the rainfall is not identical in all areas of Iran. Increasing population growth in the country, shortage of water resources in these areas and presence of industries and agricultural areas have made the...
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Comparison of tunnel excavation cycle time for Norwegian and Korean tunnels
Abstract: Tunnel construction cost and time in a drill & blast tunnel are quite different from country to coun- try since they have been developed considering geological conditions, social regulations and eco- nomic situations of each country, although the design concept and general procedures of opera- tions are practically the same worldwide. Thus, every country has been trying to reduce construction...
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EPB operation to avoid settlement problems
Abstract: Urban tunnelling projects inevitably involve risks associated with construction-induced ground movements and their ef- fects on overlying buildings and facilities. Projects impose stringent limits on allowable ground movements (sometimes measured as vo- lume loss), and evaluate performance through careful monitoring at selected sections and structures along the tunnel alignment. In addi- tion,...
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European Project NeTTUN – Making it happen
Abstract: Innovation is key to success in today’s business as it is the only way future revenues can be achieved. It is also contributes in improving our daily life and perspective, with more efficient health care, better quality products and technologies, and products and services that are less harmful to the people and environment. However innovation is a continuous process and a resource consuming...
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Study on Key Technology of the Shed-tunnel – Design and Construction by Mountain
Abstract: In the planning and construction of mountain highway or road, environmental protection is daily emphasized. The concept of taking action that suits local environment and taking the advantages shall be applied in design. Based on this design idea the necessity for arrangement of shed-tunnel for road by mountain is analyzed and the current situation of application of shed-tunnel all over the...
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The Role of Operational Factors on Water Inflow to Unlined Rock Caverns
Abstract: Widely utilization of large unlined rock caverns (URCs) located in water-bearing rock formations for hydrocarbon storage calls for more stringent hydrogeological precautions. Prediction of water inflow to the unlined caverns is one of such critical components faced by designers and hydrogeologist. Successful predictions of such issues require a thorough understanding of the physical processes...
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Non explosive method used for the widening excavation in a small diameter inclined tunnel
Abstract: The widening excavation of the small diameter inclined tunnels was planned with the hydraulic wedges. The reconstruction works has to be executed on the very old hydropower station and mining technique is not approved. Because excavation method with wedges was useless, the pre- splitting of the rock mass was wire saw was applied to executed widening excavation of tunnels. The unforeseen...
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Effect of building’s geometrical Factors on the interaction of the tunnel-surface structures, the case of Niayesh...
Abstract: Population growth in most cities leads to increase in demand of implementing surface and subsurface infrastructures. Tunnel excavation causes the deformation in surface and subsurface infrastructures. In addition, existence of structures takes effect on the movements of ground which are occurred by the tunnelling. Therefore, evaluation of the interaction between tunnel and surface structures,...
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Hard rock TBM Tunnelling in Karst Conditions: Developments and Lessons Learned from the Field
Abstract: Years of experience and multiple projects have shown that TBMs can handle all sorts of karstic conditions if the situation is identified at an early stage of the project and the TBM is designed for the conditions . The major problems related to karst occur when the conditions are either not identified at an early stage of the project or are not detected under the operation until it is too late...
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Improvement of Shimbashi Sta. Of Ginza line, the East’s First Subway
Abstract: The Tokyo Metro opened in December 1927 as the East’s first subway with a 2.2 km stretch from Asakusa to Ueno on the Ginza line. Since then, until the opening of the Fukutoshin Line in June 2008, the Tokyo Metro has expanded to include nine lines and 179 stations over a 195.1 km span of open tracks. The Tokyo Metro Ginza Line Shimbashi Station is situated close to the center of the Ginza Line...
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Underground space use evolves via application of best practices
Abstract: The paper aims at sharing among various stakeholders the questions and answers of “Why to”, the “Where to”, the “When to” as well as the “Impact of” in underground space planning. As urban space becomes a scarce commodity, urban developers, planners and architects are finding room for urban expansion downward, using the subsurface space as an urban canvas. While past practices left behind a...
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Istanbul Strait Road Tube Crossing Project Uses Good Practices to Manage Risks
Abstract: The iconic Istanbul Strait Road Tube Crossing Project (Eurasia Tunnel) includes 2.1 miles (3.4 km) of a bored double deck tunnel under the Bosphorus Strait and 0.62 mile (1 km) of twin NATM tunnels on the Asian side. The region’s variable geology, hydrology and propensity for seismic activity, combined with high water pressure and large-diameter/double-deck tunnel configuration, make the...
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MOSE project, Immersion of caissons within less than 10mm
Abstract: The Mose Project is a system of movable barriers which will protect Venice and its lagoon from ever more frequent and intensive flooding. The Chioggia inlet is one of the three gaps between the sea and the lagoon where these barriers will be installed. The barrier of the Chioggia inlet consists of eight caissons, two shoulder caissons and six gate caissons. The caissons are built in a dry dock...
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Lake Mead Intake No. 3 - TBM Tunneling at high pressures
Abstract: In response to the severe drought on the Colorado River basin and in order to preserve existing water capacity to the Las Vegas Valley, the Southern Nevada Water Authority contracted a new deep-water intake (Intake No. 3) located in Lake Mead. The current project (Contract No. 070F-01-C1) includes three miles of tunnel with very difficult geological conditions and a 650ft deep shaft and marine...
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An integrated study on the stability and dynamic response of the Taru-Toge tunnel during excavation – Conventional...
Abstract: Taru-Toge tunnel is being constructed using drilling-blasting technique as a part of expressway project connecting Shin-Tomei Expressway and Chuo Expressway at the boundary of Shizuoka and Yamanashi Prefectures in the Central Japan (Figure 1a). The maximum overburden is about 400 m. The authors have been carrying out a monitoring program to measure multi-parameter and dynamic responses of...
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