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Papers from WTC and ITA conferences have been made available as PDF documents.
ProceedingsThere are 1984 documents.
List of endorsed conferences
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WTC
World Tunnelling Congress
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Maximizing Safety and Uptime of an Underground Structure
Abstract: The methods for cable / pipe penetration sealing and retention using modular systems into tunnels will be discussed. The requirements for structural and environmental integrity, fire protection and ease of expansion for a cable termination system are presented. Current techniques of installation are compared to using a cable transit design for installing and terminating cables/pipes in...
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FAST-Tunn, a research program to develop steel quality for hard rock TBM-cutters
Abstract: There is a need to compensate the development of the TBM-technology with new cutter steel to allow an excavation method that enables the machine capacities to be fully utilized at the rock-steel interface. Therefore, a major research project has been launched in Norway at the University in Trondheim (NTNU) together with the research foundation SINTEF. The project is named FAST-Tunn, Future...
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Introducing Immersed Tunnels to New and Developing Global Markets
Abstract: Less than 200 immersed tunnels have been constructed around the world and many countries have not yet embraced the technology. It can offer a better way to cross a waterway for environmental, geometric or risk mitigation reasons. When implementing an immersed tunnel project for the first time it is important to gain a broad understanding of the technology and use the knowledge of experienced...
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Process Controlling in Klang Valley MRT Project, Malaysia
Abstract: Shield tunnelling is one of the most mechanized construction technologies to date. It is governed by its main components, the shield machine, the precast lining segments and the tail gap grouting. Given the low tolerances, the high degree of accuracy and the stepwise repeated construction process, shield tunnelling is hence accessible by methods of mechanical engineering to an extent that is...
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The Extension of the U12 Lot 3 in Stuttgart – Tunneling at its Best
Abstract: The capital of Baden Württemberg, Stuttgart, is extending its commuting network. The subway line U12 is therefore being completely reorganized: some parts of it are being closed down and other parts are being built from scratch. A joint venture consisting of Leonhard Weiß Ingenieurbau, Alfred Kunz Untertagebau and Bauer Spezialtiefbau was awarded the construction of lot 3 of subway U12. Altred...
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Testing of properties and constructability considerations of EVA based sprayed membranes for waterproofing of tunnels
Abstract: Site and laboratory testing of sprayed concrete linings waterproofed with spray-applied membrane has been carried out over a period of 3 years. The site testing has been carried out in several full scale test sections as well as a longer section of a rail tunnel in hard rock in Norway. The linings were tested for moisture content and tensile bonding strength. The results of the site testing...
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Seismic survey using excavation blasting under tunnel construction – TFT Survey at road tunnel construction in Japan
Abstract: TFT survey using “Tunnel Face Tester” is a measurement method to be able to record arrival time and wave form of seismic wave occurred by an excavation blasting without interruption of tunnel excavation work. TFT survey is able to evaluate geological condition around a tunnel face using direct waves. At the same time, this is able to predict geological change, for example fault or frac- ture...
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The use of umbrella arch method and rebars spiles, in the same road rock tunnel
Abstract: The Morro Agudo is a road single tunnel, built in the south of Brazil, on the BR-101 federal highway, as showed in Fig. 1. With two lanes plus shoulder, and 1,007 m of extension, this tunnel was a key part to increase the capacity of that highway. In geological point of view, the tunnel is in a granitic rock mass, with presence of mature soil from weathering, with variable thickness at about 3...
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AID in Road Tunnels with Intelligent Loop Technology
Abstract: An early detection of incidents in road tunnels is of utmost importance in road and tunnel safety. The system which will be presented here is an innovative Automatic Incident Detection (AID) system which monitors the traffic flow through a tunnel continuously and alerts the tunnel operating personnel with extremely high accuracy automatically within seconds if an incident has occurred. By that...
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Arching depending on the deformation of the tunnel face
Abstract: Tunnel excavation leads to ground deformation due to the stress redistribution around the tunnel face, causing differences in lateral and longitudinal directions. This arching effect is expected to change the size and shape depending on deformations in the tunnel face. Thus, this study attempted to analyze the arching effects and behaviors of the near ground depending on displacements in the...
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A Study on Development of the Performance Evaluation Index of Tunnels using the Delphi-Method
Abstract: Currently in South Korea, various social problems are predicted due to aging of the major national structures, and tunnels are under the same situations which are a performance decline, a sudden increase of maintenance cost and risk. The existing evaluation method of tunnels in South Korea has a lot of limitations to be considered of tunnels’ various performances (e.g. durability, usability and...
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Application of deep corrugated flanged structural plates for construction of vertical shafts and horizontal lining
Abstract: Corrugated steel plate structures (CSPS) have been used for almost 100 years in civil engineering projects all over the world [1], [2]. Traditional applications are culverts, small bridges and under and overpasses as well as tunnels. There are several types of corrugations available today. The smallest is 68mm*13mm and largest is 500*237 mm. They will mainly decide on sizes of structures built,...
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Evaluation Model of Technical Condition for Highway Tunnel Lining Structure Based on Matter-Element Theory
Abstract: It is the largest in the world that the mileage and construction scale of new highway tunnels of China Safety problem of tunnel structure has been more and more emphasized heavily. Based on construction experience, long term safety of highway tunnel is mainly depending on technical status of supporting and lining. Nevertheless, the technical status evaluation has long been based on technicians’...
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First experiences gained with the hybrid EPB technology in the Rio de Janeiro sands
Abstract: The shield-driven tunnel of Metro Rio Line 4 between the General Osório II and Gávea stations has an approximate length of 5.2 km. The double-track tunnels have an internal diameter of 10.33 m with a 0.40 m thick segmental lining. The excavation is carried out using an Earth Pressure Balanced shield with an excavation diameter of 11.53 m.
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Creep behaviour of fibre reinforced sprayed concrete
Abstract: Fibre Reinforced Sprayed Concrete (FRSC) is commonly used for underground support. Various types of fibres are suitable to reach the usually required specifications on energy absorption. However the use of FRSC still raises questions. One of them is about the long-term behaviour under sustained flexural load (creep). ASQUAPRO launched specific tests on this subject in October 2014, using six...
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K0 Parameter Influence In Tunneling Superficial Settlements and in Liner Stresses
Abstract: This paper describes the influence of the k0 parameter (ratio between vertical and horizontal "in situ" stresses) in superficial settlements and liner stresses caused by NATM tunnel excavation in a residual soil massif in São Paulo Line 4 Yellow Subway expansion. Are presented two-dimensional numerical analyses using Finite Diferences Method implemented in FLAC software, for the construction...
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