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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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Shield urban tunnelling developments applied for the extension of Sao Paulo´s Metro
Abstract: Sao Paulo´s Metro Network comprises five lines in service with a total extension of 107 km for one of South America´s most boosting cities with a population of over 11 million inhabitants. The network can be considered to still be in its early stages after the first line was constructed in 1968 and it is presently undergoing an extension. Whilst Sao Paulo´s settlement-prone Tertiary soils and...
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Road tunnels in Colombia: Past, Present and Future
Abstract: Colombia is one of the countries in the world with the highest projection in terms of construction of road tunnel and it is estimated that by the end of the 2020´s decade, have been built around 300 kilometers of them. This paper describes briefly the history of Colombia road tunnels, with special focus on the main geotechnical developments that have been made, especially the selection of...
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Enhancing EPB shield drives in rock and mixed face conditions in Panama City
Abstract: Several known EPB shield reference projects in rock can be picked out worldwide. However fewer are the large diameter EPB shield drive projects excavated in rock under the groundwater table in densely populated areas for metro projects.The excavation of the first metro line in Panama City sets a benchmark in rock shield tunnelling due to its typically urban area boundary conditions with strict...
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The Scanning of Tunnels – The Portuguese Experience
Abstract: In 2004, the National Railway Network of Portugal started to use laser scanning technology for the inspection of tunnels. In partnership with a German company, all tunnels in the Portuguese Railway network have been digitized in a campaign of three weeks duration. The entire inspection process has been improved considerably by intensive usage of the scan data. Software tools for field and...
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Application of a new guidance system for double shield TBMs at the Koralm tunnel project in Austria
Abstract: The contribution presents a new guidance technology for double shield TBMs. It is based on a digital shield camera system on the back shield (gripper shield) that tracks a special designed target unit mounted on the front shield, and a conventional guidance system using a robotic total station and two motortargets. An additional component is an automatic tail skin clearance measurement system...
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Monitoring Atocha-Chamartin High Speed Railway tunnel. Madrid (Spain)
Abstract: The High Speed Tunnel between Atocha and Chamartin Stations in Madrid is the biggest diameter of Spain. Its execution has been particularly delicate because of the particularity of being fully implemented in urban environment. The tunnel has approximately 7 km long and an outer diameter of 11.495 mm. It runs below 8 lines metro, parkings of 4 floors, collectors, buildings, commuter tunnels,...
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Monitoring System of Railway Tunnels with Wireless Sensor Network
Abstract: A monitoring method with a wireless sensor network was developed to lighten the workload of data acquisition and reduce the monitoring cost of railway tunnels. A relay method was proposed to transmit the data for a long distance. The performance of the monitoring system was verified by means of field tests in actual railway tunnels. This paper also describes the data processing method which...
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“TREVI-CALATORE”: innovation in cut and cover and tunneling for the installation of plunge columns aimed to excavate...
Abstract: The installation of foundation elements (large-diameter Bored Piles or Diaphragm Walls) for the carrying out of underground works to be performed through the "Top Down" Technique (Stations, Car Parks, Subways, Artificial Tunnels) often implies the need to insert within said foundation elements, with pinpoint accuracy, some steel or prefab structures serving as provisional/definitive columns of...
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Integrated data processing and simulation platform for mechanized tunneling – Showcase application on the...
Abstract: In the mechanized tunneling process a vast amount of data is collected, processed and stored in various locations and formats. An integrative strategy supporting the processing and visualization of data from different sources in connection with simulation based prognosis is becoming more and more important, especially when considering the complexity of interacting tunneling processes in...
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New high speed railway tunnel link between Atocha and Chamartín stations in Madrid (Spain): Design of ground...
Abstract: During the design phase for the new tunnel of high speed railway connecting stations of Atocha and Chamartín in Madrid (Spain), ground treatments to mitigate potential induced subsidence on the nearby structures were established. During the construction several modifications were carried out on site and found the good behaviour of excavation and the response of the ground. Protection systems...
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Twin tunnels and asymmetrical settlement troughs in soft soils
Abstract: Numerous designs in twin tunnel projects assume the superposition of two Gaussian settlement curves as a method to evaluate the overall settlement induced by their excavation. In this paper we verify a quick method for settlement trough fitting and volume loss estimation for the second tunnel of a twin tunnel project, based on Peck’s formulation and using the data obtained in the first...
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Floating Construction of an immersed tunnel – Söderströmstunnel
Abstract: The immersed tunnel “Söderströmstunnel” located in Stockholm is under completion. The three tunnel elements were constructed with an outer steel shell, transported from Tallinn to Sweden on a barge. After offloading the steel shell, concrete was cast while still in a floating condition. This paper will describe the methods and challenges of the concrete casting...
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Structural analysis and design for final lining bifurcations in alluvial grounds Niayesh Tunnel (Tehran, Iran)
Abstract: This paper is to present the structural analysis and design of the final lining for the bifurcations of Niayesh tunnel minimum overburden(18m) .The tunnel section considered for design has a maximum width of 30m and maximum height of 17m.The main tunnel lining is composed of a double shell lining system consisting of both initial support and final lining . It is assumed that all loads are...
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Performance monitoring for back-analysis of hard rock TBM tunnelling: the case of the Frejus safety tunnel
Abstract: Phenomena such as convergence and anisotropic behaviour can be expected when tunnelling through schistose rocks under high overburden in the Alps. The 13 km-long safety tunnel of the existing Frejus Highway tunnel, at the French-Italian border, is currently under construction and the 6.5 km-long French Lot was successfully completed with a hard rock 9.4 Ø...
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Design and Implementation of the Control System of the Operational Ventilation in the Blanka Tunnel
Abstract: This paper presents a design and an implementation of a control system of the operational ventilation in the Blanka tunnel, which is the most complicated road tunnel complex in Central Europe. The ventilation system of the tunnel is relatively complex and is divided into two subsystems – longitudinal and transverse. Energy consumption optimization during the...
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TBM excavation of the Frejus safety tunnel through highly deformable schistous rock mass under high rock cover
Abstract: The 13km-long safety tunnel of the existing Frejus Highway Tunnel at the French-Italian border, in the Western Alps, is currently under construction. The first 6.5-km lot is successfully excavated. The tunnel is being excavated by a 9.4m-diameter, single shield TBM and is lined with 0.4m-thick precast concrete rings. The tunnel is excavated through anisotropic schistose...
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