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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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A case study of Virtual Design and Construction and BIM in the Stockholm bypass, Europe's largest road tunnel project
Abstract: The Stockholm bypass is a 21 km long motorway west of Stockholm, Sweden, that requires excavation of an approximate 50 km of rock tunnels. The Swedish Transport Administration, Trafikverket, has made several strategic decisions about using requirements management and modern design products that would lead to more efficient design, building and operation phases. Embracing the principles of...
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The role of temporary support in the design of the final lining
Abstract: Tunnel final lining is often designed to fully undertake all loads during tunnel service life, such as loads from the surrounding ground, water pressure, live, accidental and seismic loads, while neglecting any contribution of the temporary support. The role of the temporary support measures in the final lining loading and design, even if they are finally...
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Smart Control of Hydraulic Actions in Tunnels and Underwater Structures
Abstract: Selecting the tunnel type is very important in subsea and subriver tunnels if the difference between ordinary water level and flood water level is very high or if the difference between wave and tide levels is considerable. This is because, in the case of a drained tunnel, excessive influent disposal can be a large burden during operation, and for watertight tunnels, lining damage may occur...
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State-of-the-Art Application of Conventional Tunneling for the Northern Boulevard Crossing – East Side Access...
Abstract: The East Side Access project in New York City, which will provide a new connection for the Long Island Rail Road into Grand Central Terminal, recently completed the crossing under Northern Boulevard. Tunneling involved the development of a very large cross-section at a springline diameter of about 18.4 meters in soft, water-saturated soils using SEM tunneling techniques...
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Availability of evaluating ground condition using geophysical exploration in mountain tunnels
Abstract: Recently, continuous ground displacements have resulted in damage to the lining of, or floor heaving in several Japanese tunnels. Since there is no diagnostic method for these longterm ground deformations, a technical method for evaluating the health of ground is needed. A diagnostic method is required that uses a standard index to evaluate the ground condition continuously from construction...
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Skewed Tunnel Portal Design
Abstract: Geometrical alignment conditions as well as topography restrictions lead to portal designs which do not necessarily intersect the ground in a desired perpendicular angle. Lack of portal design guidelines and a vague understanding on the rock mass yields, as a consequence, conservative (heavy/stiff support) portal designs, complex construction procedures, longer construction time and a...
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Guidelines and Methods on Segmental Tunnel Lining Analysis andDesign – Review and Best Practice Recommendation
Abstract: Methods for analysis and design of segmental tunnel linings are presented inconformance with standards and guidelines from Austria (ÖVBB), France (AFTES), Germany(DAUB), Japan (JSCE), Netherland, United States (FHWA) and International Tunneling Association(ITA). Effect of embedment loads on segments is analyzed using elastic equations, a beam-springmodel, and Finite Element or Finite Difference...
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Planning, control and optimization of EPB TBM tunneling operations in urban areas
Abstract: This paper provides an overview on planning, control and optimization of EPB TBM tunnelling operations in urban areas in diverse soil conditions. The extensive experience of the author in dealing with diverse project conditions and environment around the world, are used as the basis to provide basic guidelines to specialist contractors and consultants involved with detailed planning and...
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Extension of Bucharest Metro Line 4 – Specific Conditions of Works
Abstract: Construction of Metro line 4 began in 1989. Due to the lack of funds, in ’90 years, it was stopped for 8 years. Initially, it were provided 7 stations on a 6.5 km length of the line. The works restarted in 1998 and on the 1 of March, 2000, first section it was commissioned, having 3.36 km in length, with 4 stations: Gara de Nord 2, Basarab 2, Griviţa and 1 Mai. Following in time, on the 1 of...
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Testing of sprayed waterproofing membranes for single shell sprayed concrete tunnel linings in hard rock
Abstract: Tunnel linings based on sprayed concrete and sprayed waterproofing membranes are being considered for rail and road tunnels in hard rock in Norway. One completed tunnel and several specially constructed test sections with this tunnel lining type have been sampled and investigated in order to determine the in-situ humidity condition of the tunnel lining. The measured humidity contents in the...
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An innovative application of sprayed concrete linings for the London Underground transport network upgrade
Abstract: The London Underground transport network is undergoing an upgrade programme for lines and key stations to address steadily increasing passenger numbers and an ageing infrastructure. This paper indicates some elements of the upgrade programme and where the Tottenham Court Road Station upgrade sits within that plan. One of the most challenging parts of this project, two "overbridges" over the...
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A Study on Precise Positioning Methods Based on Multiple Systems for Immersed Tunnel Element Installation in Shallow...
Abstract: For the immersed tunnel element installation in shallow waters，it is very important to provide automatically positioning solution of high accuracy and reliability to guarantee the safety of construction. Therefore, a precise positioning method is studied in this paper. First of all, a comprehensive monitoring system, which is composed of survey towers, total stations, GPSs, MRUs, compasses and...
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Overcoming the geological and design related challenges of the 510 MW hydropower project of Cerro del Águila, Peru
Abstract: The 510 MW hydropower project Cerro del Águila is currently under construction in the external Peruvian Andes. It includes a 80 m high gravity dam, a 7.6 km long headrace-tailrace tunnel system with a 10.5 m high, simplified horseshoe section, a 250 m high pressure shaft, a 40x86x18 m powerhouse cavern located 350 m underground, and various surge, access and construction tunnels. All...
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A System for the analysis of precast tunnel segments during shield tunneling based BIM
Abstract: The paper addresses precast tunnel segments for the west line of the Hongmei South Road Tunnel to study how to monitor and record the structural behavior of precast tunnel segments. To aim this target, an intelligent system based BIM is designed and created. The system is divided into four layers. At the data capturing layer, the shield excavation information, the ground surface...
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An Integrated Information Framework for Precast Tunnel Concrete Lining Segments Life-Cycle Management
Abstract: The quality of precast concrete lining segments is associated with the safe operation of the tunnel closely. Researchers and engineers require full life-cycle information of precast concrete lining segments so as to analyze tunnel defects, maintain tunnel segments and prolong the life of tunnel. This paper proposed an integrated information framework from the...
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New study to assess the geomechanical behavior of the expansion of the Rodoretto talc mine
Abstract: The paper describes the study carried out in the Rodoretto mine to verify the behavior of the mine infrastructure after a new exploitation extension. Due to a complex geometry and variability in the geology, the new stress distribution around mine infrastructures has been assessed by using numerical methods. Using an ideal elasto-plastic model also the yielding zone distribution has been...
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