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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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Analysis on Surrounding Rock Deformation of Double-arch Tunnel in Urban Underground Road
Abstract: It is imperative to develop and utilize the underground space with the growing contradiction between urban development and the lack of land resources. The International Academic Conference on Underground Space held in Tokyo in 1991 passed the Declaration of Tokyo, and pointed that the 21st century was of exploiting the underground space by human beings. It can reduce the occupation of land...
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Study on mechanics characteristics of tunnel structure crossing under high-rise building
Abstract: Nowadays, High-speed railway is extended to the China Midwest, but there exists a higher design or construction requirements for high-speed railway compared to Eastern China due to a mountainous area with complex geological conditions and terrain conditions. The new railway line from Lanzhou to Chongqing has to cross underneath the high-rise building group at LYS-14 section of the suburbs of...
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Lugano tramway System: a part of the public transport network
Abstract: Due to multiple additions of adjacent municipalities, the size of the city of Lugano has been grow-ing over the last decade. The agglomerate of Lugano has currently approximately 125’000 inhabi-tants who need an efficient transport system. The last decade has also seen the development of the Valley of Vedeggio as an industrial and services area (research and banking institutes). The Breganzona...
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New Hydro-mechanical Tunnel Excavation Method using an Abrasive Waterjet System
Abstract: Hard rock excavation in urban areas is quite a challenge owing to the excavation vibration level and the necessity of rapid excavations. Conventional blasting methods and/or the use of a tunnel boring machine (TBM) are broadly utilized at present. However, conventional blasting methods cannot prevent the propagation of blasting vibration, while the TBM method is not appropriate for mixed ground...
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TBM Design for Long Distance Tunnels: How to keep Hard Rock TBMs boring for 15 km or more
Abstract: Today’s Tunnel Boring Machines are often required to bore longer tunnels in harder rock at a faster pace—a trio of challenges that can be daunting for any contractor. With proper design, operation, and maintenance, however, modern TBMs are very capable of reaching their 10,000-hour design life or more. TBMs in the industry today have already accomplished the feats of boring upwards of 50 km on...
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Multi-shaking-table Test of a Long Immersed Tunnel
Abstract: Shaking table, which was developed for structural engineering, was also applied to pile foundation in geotechnical engineering ( Meymand, 1998). Yang et.al (2004) applied structural shaking table to test the seismic behaviour of metro tunnel. It was believed that long tunnel would suffer from more
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Galgenbuck Tunnel – Tunnelling in extremely changeable geological conditions
Abstract: The Galgenbuck Tunnel project is located in the canton of Schaffhausen in northern Switzerland. The tunnel is intended to relieve the district of Neuhausen of the commuter through traffic. The extension of the motorway connection Schaffhausen Süd and the Galgenbuck Tunnel will connect the region of Klettgau, which lies to the west of Neuhausen, to the N4 motorway without a cross-ing. In 1970,...
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Unique Hybrid EPB Design for use in Coal Mine Drifts
Abstract: The history of mechanized tunneling for mine exploration and access tunnels started more than fifty years ago with the Steep Rock Iron Mine in northwestern Ontario, Canada. The use of Tunnel Boring Machines (TBMs) in mines continued through the 1960s and 1970s, achieving high rates of excavation in soft rock, but their applicability was limited and their costs too high. Despite the drawbacks,...
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Review of Ground Movements during SCL Tunnelling in an Urban Environment
Abstract: Bond Street station is located in Central London approximately 100m south of Oxford Street. Running parallel to Oxford Street, the station comprises 2 new ticket halls connect by 10.2mØOD, 250m long platform tunnels 15m to 16m to crown below ground level. The location of the works and site layout are shown in Figures 1 and 2 respectively. The area is home to a number of antique dealers, high...
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Line 5 tunnels construction challenges – Metro de Caracas, section Plaza Venezuela – Parque del este
Abstract: Metro de Caracas Line 5 construction has about 7,5 km of EPB Shield Tunnel and 5 stations constructed with the NATM (New Austrian Tunnel Method). Due to the Caracas Valley heterogeneous underground, the existing water table in the whole alignment, high population density and superficial and underground boundary structures, the construction execution has have some high grade difficulties for the...
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Mechanical improving of granular soils by permeation grouting: results of laboratory tests
Abstract: The injection of natural soil using proper mixes is one of the most effective ground improvement technique. Consolidation and waterproofing are the two main purposes of these treatments, both in granular soils and in rock masses. The application field of these materials, depends on many external parameters, related to the characteristics of the soil, the injection mixes and injection techniques...
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Waterproofing in underground structures with synthetics membranes: the vacuum system, testable and reparable
Abstract: The waterproofing systems based on synthetic membranes for underground structures in the last 10 years have had a remarkable development: the need to move from the concept of "simple membrane" applied to a broader of “system” in fact meant that industry leaders should develop complex solutions able to offer increasing levels of security depending on the particular performance requirements for...
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Simulation of stresses around tunnels from measurements of convergence and Overcoring Method
Abstract: During the excavation of the tunnel Morro Alto in the federal highway BR-101/RS was encountered faults along the longitudinal axis of the tunnel. After stabilization of deformations, the final convergence was less than 10 mm in the section close to the fault zone. Even with the apparent stability of the massive, cracks appeared in sprayed concrete line. From further research, it was identified...
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Analysis of TBM Performance in Two Long Mechanized Tunnels, Case History of Karaj Water Conveyance Tunnel Project...
Abstract: Analysis and assessment of TBM performance during construction and comparing the field performance with the predicted values is important in optimization of tunneling activities. This includes the analysis of rate of penetration and machine utilization factor as the main focus of such studies. This paper offers an overview of TBM performance in Lot 1 and 2 of Karaj water conveyance tunnel...
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Changing role of client for tunnel projects in the Netherlands
Abstract: Since the 1950’s, tunnels are being built in the Netherlands. Rijkswaterstaat is the client for tunnels in the Dutch national highway network. Over time, both the clients’ role as well as the contractors’ role have changed and with that transition, the responsibilities of both parties and the allocation of project risks have shifted. Technical developments in tunnel installations have led to...
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Learned lessons from accidents on underground constructions in São Paulo city, Brasil
Abstract: In recent decades, the metropolitan area of São Paulo city faced a great number of large underground constructions; with them, some accidents raised questions about engineering solutions in use. The investigation of the factors involved in these accidents brought a great learning experience for professionals linked to the works, such as: the importance of geological and geotechnical most...
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