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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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Mechanized Tunnelling – Technology and Developments for two large diameter projects in Latin America focusing on EPB...
Abstract: Sustained economic growth in almost all Latin American countries in recent years has created a favorable constellation of interests for the development of South American transportation and energy infrastructure that has not be seen before. In Panama City a light rail line will be constructed that will be the first of its kind in Central America and will help to alleviate traffic congestion in...
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Clogging and disintegration of fines during mechanized tunneling in clayey soils
Abstract: Shield tunnelling in fine-grained soils is frequently obstructed by clogging. The clogging risk of soils depends on multiple mineralogical and soil-mechanical parameters. The existing approach of estimating the clogging potential, which is derived from the indices of plasticity and consistency, has proven to be beneficial for practical purposes. Furthermore, the dissolving of fines from a...
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A holistic approach for the design and optimization of Metro tunnel ventilation shafts considering safety issues and...
Abstract: This paper presents a holistic approach for performance based designs of tunnel ventilation system and more particularly for ventilation shafts design in metro projects. This approach takes into account various parameters of a project that may influence the design and the optimization of ventilation shafts. Project geometry, train characteristics, operating parameters, evacuation means and...
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The 2nd Coentunnel - Design requirements from construction and service life risks
Abstract: The 2nd Coentunnel has to solve the traffic congestion around the Dutch capital. The project consists of the design and construction of an immersed tunnel under the North Sea Canal, the upgrading of the connecting highway structure and maintenance of the assets for 30 years. The design of an immersed tunnel is strongly characterised by the construction method, the transport by sea and the...
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Underground Geological Storage of Natural Gas
Abstract: Natural gas storage plays a crucial role in balancing supply and demand in most gas consuming countries, but we all know how surface areas are scare for any construction and how dangerous can be this type of store into a big city or for the environment. Fortunately, one of the solution is Underground Geological Storage of Natural Gas, because it is not only considered most efficient process to...
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Risk Mitigation in Urban Infrastructure Projects
Abstract: Complex infrastructure projects require continuous monitoring of project risks, reporting and evaluation of the project progress, and the service cost assessment as part of management duties. Web-based, modular and thereby project-related configurable technology platforms such as IRIS.tunnel offer real-time connection of so far autonomous systems such...
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Two-component backfill grout system in double shield hard rock TBM. The “Legacy Way” tunnel in Brisbane,...
Abstract: The main purpose of the twin tunnels of the Legacy Way project is to connect the western freeway at Twoowong with the inner City Bypass (ICB) at Kelvin Grove, providing an alternative route to local roads for traffic. The project was awarded to the Consortium Transcity, including the companies Acciona, BMD Constructions and Ghella, which used...
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A case study on construction method of four-line tunnel in weak rock
Abstract: In China, there is a railway station extended into a tunnel with 547m, which located in secondary line from Liupanshui to Zhanyi. So a large span tunnel with four lines formed. Its largest excavation span reaches 28.42m, and the maximum cross-section area is 354.30m. This paper took this case studied. It is suggested to divide the tunnel to three sections as portal section, shallow buried...
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Structural analysis and design for initial lining bifurcations in alluvial grounds Niayesh Tunnel (Tehran, Iran)
Abstract: The objective of this document is to present the structural analysis and design calculations for the initial lining of the the enlarged portion of the tunnels sections called bifurcations. combination of rib elements and NATM tunneling stages was chosen as the design method for bifurcations in the Niayesh tunnel.The scope of this document is the finite element analysis of the soil construction...
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Stability, traffic safety and durability of underground structures during service time guaranteed by engineering...
Abstract: To guarantee the stability, traffic safety and durability of underground structures a continuously inspection and supervision is necessary. Based on existing general standards and regulations for civil engineering structures a new concept for engineering inspection and supervision of tunnels and underground structures of urban metro systems has been developed by the Institute and Laboratory of...
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Discontinuities on Hydrogeology of Underground Oil Storage and Hydrodynamic Containment
Abstract: Hydrodynamic containment principle in oil storage cavern is essential concept forsuccessful storage of oil products in underground cavern while avoiding leakage of products. Thus, hydrodynamic containment should be ensured throughout the stages of design, construction and operation. From the literature review, it is found that heterogeneity in continuum based modeling requires additional safety...
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Development of Innovative Connections for Pipe Umbrella Support Systems
Abstract: Pipe umbrella support systems have been used successfully for tunneling in challenging ground conditions since the 1970’s. Historically, the drilling unit was the limiting factor for pipe umbrella installations - less attention has been paid to pipe couplings and their influence on labor time and load-bearing capacity. The present paper describes the development of two new alternative...
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Independent peer review processes regarding stability and serviceability during planning, design and construction of...
Abstract: The increasing size and population density of metropolitan areas and the along going traffic demands lead to the construction of large infrastructure projects. The construction of new underground structures has an influence on existing superstructures and the deconstruction of existing buildings has an influence on existing underground structures. To guarantee the stability and the...
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Study on chamber pressure and slurry level of mixed shield by prototype test
Abstract: Nowadays, more precise control method on face pressure of slurry shield is beingadopted, combining air pressure control at the upper part of an air chamber with conventional slurry flow control. To grasp the feature and the control method of the air combined system, a prototype test was carried out using the model, which is composed of a cutter chamber, an air chamber, a slurry circulation...
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Bi-layer diaphragm walls: theoretical and experimental analysis of debonding risk
Abstract: The bi-layer diaphragm walls, presented in this work, are made of two layers: the first one, a conventional concrete diaphragm wall, and the second one, a steel fibre reinforced concrete layer sprayed over the first one. A main objective of the research project is to maximize the functions of the second layer, assigning simultaneously a structural and a waterproof responsibility. The objectives...
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Assessing the impact of a deep basement excavation on old rail tunnels in Sydney, Australia
Abstract: The use of the underground space in major cities often involves excavating in complex settings where interaction with existing structures such as buildings and old tunnels may be expected. The feasibility of an iconic new 32-storey tower in the heart of Sydney required the excavation of three basement levels in the vicinity of rail tunnels built in the 1930’s. Due to the high traffic volume of...
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