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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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Tunnel climate - challenge during the Brenner Base Tunnel construction
Abstract: The BBT represents the key element of the planed railway link between Munich and Verona and therefore of the European high performance railway network (cf. Fig. 1). With its length of more than 55 km (64 km including all existing tunnel connections) this tunnel system will be amongst the world’s longest traffic tunnels (cf. Fig. 2). The project consists in the excavation, lining and...
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Full-scale loading test of a Hybrid SFRC segment lining
Abstract: The use of Steel Fibre Reinforced Concrete (SFRC) in a segment lining has continuously been growing due to its higher bearing capacity and cost-effectiveness than a conventional rebar-reinforced concrete segment (Angelo et al., 2011). However, its definite design rule or specification has not been proposed yet, and it prohibits SFRC segment from becoming more popular in shield tunnels....
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Lining crack evolution: a qualitative and quantitative index for degradation of tunnels in operation
Abstract: Pertinent evaluation of structural integrity and safety of tunnels in operation is a prospect that tunnel engineers are striving for. In the meanwhile, clarifying the cause of tunnel anomalies is also essential to effective tunnel maintenance. Researches indicated that the pattern of lining cracks can be characterized to suggest possible candidates of anomaly causes. Nevertheless, quantitative...
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New Developments for Roadheader Navigation
Abstract: The paper describes latest developments in the field of roadheader navigation and control. Next generation roadheaders incorporate high degrees of automation and allow remote data access if networked. To enable high-precision cutting and optimal roadheader use, the continuous measurement, processing and use of the absolute 3D tunnel position and orientation data of the machine and its cutting...
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A Case Study on the Design of Pillars at Diverging Area of Urban Underground Road
Abstract: In recent years, underground roads in the urban area in South Korea have been planned to be long road tunnels with a depth of 50m or deeper. And the turnout sections that connect to ground roads nearby have also been planned to be built as large cross-section tunnels based on good rock conditions. However, the construction records and design cases involving the ways to secure stability on these...
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Numerical Investigation of the Interaction between Twin Tunnels
Abstract: The construction of twin tunnels is common practice in either conventional or mechanized shield-driven tunnelling for safety and functionality reasons. However, existing design methodologies focus on single tunnels, thus neglecting the potential interaction between neighbouring tunnels, especially if the latter are closely spaced. This paper investigates the interaction between twin circular...
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Cutter Forces Measurement with (PLCM ) Comparison with the Theoretical Models
Abstract: Proper machine and cutter selection, cutter head design and performance prediction for mechanized excavators such as TBM or roadheaders are the most important parameters for a mechanized tunnelling or mining project. The most used machine design parameters are cutter layouts, cutting power of the machine, torque and thrust. Besides, performance prediction of the machines can be done by...
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LCA (Life Cycle Assessment) applied to the construction of tunnel
Abstract: LCA has already been applied to evaluate the potential impacts of tunnels on the environment. Indeed, this method which has been first developed for products and services is now usually used for buildings and turned out to be also very useful for other civil engineering structures like bridges and tunnels, and for public works. According to the Nordic Concrete Network, cited by the FIB in its...
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“Piazza Meda” underground car park in Milan (ITA)
Abstract: The “Piazza Meda” car park in Milan is located in one of the most prestigious squares of the city, close to the Duomo and only 20 m away from the Belgioioso Palace, masterpiece of neoclassical architecture. The park has 5 floors, with a depth of approximately 17 meters. The most challenging aspect of the design was the analysis and the prediction of the behavior of the retaining walls,...
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TBM Pressure Models: Calculation Tools
Abstract: Mechanized tunnel construction in soft ground has evolved significantly over the last 20 years, especially on the matter of settlement control. This was achieved by guiding the TBM operation to control the main factors that induce soil displacements, namely the face pressure and the closure of the soil-lining void. Nowadays, TBMs can be operated within strict serviceability requirements....
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A Review of Planning Methods for Logistics in TBM Tunneling
Abstract: One of the often overlooked but crucial factors for quick TBM project completion are correctly dimensioned and managed logistic systems. As Mechanized tunnelling is applied in more and more projects worldwide, professional and standardized planning methods as well as reliable performance prediction methods become increasingly important as well. The outstanding records regarding safety,...
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Optimal Profile Pattern for NATM Tunneling in Soft Ground
Abstract: The New Austrian Tunnelling Method (NATM), as named by Professor Rabcewicz, is defined as a tunnelling method that consists in stabilising the ground around the excavation in the most safe and economic manner possible by making extensive use of the bearing capacity of the ground with the help of sprayed concrete and other support elements as well as through the use of measured data. Making use...
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Soil-structure interaction during tunnelling: an integrated approach
Abstract: In the last few years two-dimensional (2D) and three-dimensional (3D) numerical approaches have been developed to overcome the limitations of existing closed-form empirical solutions (e.g. Peck, 1969) in the prediction of tunnelling-induced settlements and related potential structural damages. This study refers to the case of the Milan metro-line 5, recently built in coarse-grained materials...
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Procedure for Urban Infrastructure Project’s minimization due to the impacts of the undergrounds public service’s...
Abstract: This paper introduces a procedure to ensure the feasibility of project proposals, facilities construction and underground services networks enhancements which could potentially affect any densely populated area while being carried out. A common problem is the fact that the documentation as built that public service’s companies provide usually differ from the real field positioning. This...
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Tunnel-Induced Settlements – Analysis of Measurements and FE Calculations
Abstract: Nowadays the realistic prediction of tunnel-induced settlements in urban areas is very important, in order to gain the acceptance of the population for a tunneling project. In this case numerical analyses as well as empirical procedures are suitable. The advantage of empirical settlement trough calculations is, that they can be applied fast and easily and that they use experience from earlier...
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Decision-making for the selection of the most suitable tunneling method
Abstract: The determination of the most appropriate tunneling method is one of the biggest challenges in the design of tunnel projects. For the most suitable method selection, no general statement can be made, as it generally depends on the project-specific conditions. A direct comparison of tunneling methods based on already excavated tunnels is not possible. This would make sense in the case of nearly...
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