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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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Design and construction of escalator shafts and an inclined access passage at the new Elizabeth line Liverpool Street...
Abstract: Escalator shafts and inclined access passages are essential for underground stations as they provide access from ticket halls typically at surface level to deep level platform tunnels. The design and construction of these inclined shafts can present as many or more challenges during the design and construction compared to typical horizontal tunnels and vertical shafts. The new Elizabeth line...
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Oslo Follo Line/ Norway – Project Challenges and TBM Solutions
Abstract: Until recently, all rail tunnels in Norway were excavated using drill & blast technology. The Follo Line project is a new 22 kilometers long double track rail line that is currently under construction between Oslo Central Station and Ski. Four double shield hard rock TBMs with an excavation diameter of 9.96 meters excavate a total of about 36 kilometers of predominantly Precambrian gneisses...
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Mechanical Behavior of Mountain Tunnel during Earthquake Based on Dynamic Measurement in an Actual Tunnel
Abstract: Rock tunnels suffered severe damage from recent large earthquakes in Japan, despite the empirical knowledge that tunnels tolerate earthquakes better than surface structures. Seismic design for rock tunnels have therefore become a fascinating subject for many tunnel engineers. However, even basic behavior of tunnel has not been fully understood due to lack of actual seismic data. In this study,...
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Analysis of contractual provisions of risk management in Rohtang tunnel
Abstract: Construction of tunnel always involves risk which is closely related to cost, time and safety. Provisions of risk management and risk sharing have been covered in construction contract of Rohtang tunnel. Method of Rock mass classification with anticipated rock class throughout the length of the tunnel has been provided in tunnel. Stoppage of construction due to geological surprises, Force...
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Design and Construction of South Hartford Conveyance and Storage Tunnel and Pump Station
Abstract: The South Hartford Conveyance and Storage Tunnel (SHCST) is a major component of the Hartford Metropolitan District’s Clean Water Project. This tunnel is intended to capture and store Combined Sewer Overflows (CSO) from neighbouring areas. The project is estimated to cost approximately $500 M and is constructed in multiple construction contracts. The project components include a deep rock...
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Pressure distribution in EPB pressure chambers: New insights from computational flow simulations
Abstract: In mechanized tunneling construction with Earth Pressure Balance (EPB) machines, the conditioned excavated soil paste inside the chamber is employed as the support medium. Information on the actual pressure distribution in the chamber is important to evaluate the effective safety of the tunnel face against loss of stability. On job-sites, pressure sensors are often installed on the bulkhead and...
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Underground Projects: Insurance coverage, Insurance market trends and risk cost reduction through proactive risk...
Abstract: All civil engineering project, and more specifically the large underground schemes, are prone to inherent risks which have the potential to cause substantial losses when are realized. some of these risks can be transferred, in the form of insurance, whilst others exceed the insurance coverage scope. The present contribution elaborates on the insurance market particulars, with emphasis on the...
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Risk-Based Integrated Cost and Schedule Analysis for Major Infrastructure Projects
Abstract: Effective cost and risk management is essential for the success of large infrastructure projects as demonstrated by a long history of cost overruns. In order to achieve cost transparency and to adequately consider cost and schedule uncertainties (risks), base cost validation and probabilistic methods need to be used for a full risk assessment. Probabilistic methods include identification and...
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Üsküdar ümranİye çekmeköy metro construction tbm tunnels passage to the üsküdar square construction works
Abstract: The tunnel excavations in Uskudar-Umraniye-Cekmekoy metro construction project conducted by the Istanbul Metropolitan Municipality Department of Rail Systems, Directorate of Rail Systems on Asian Side, are executed by using both NATM and TBM excavation methods. Platforms, scissor crossing tunnels, transportation tunnels, link tunnels and ladder tunnels that have various cross sections are...
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Radar interferometry as an innovative solution for monitoring the construction of the Grand Paris Express metro...
Abstract: The Grand Paris Express (GPE) is an unprecedented urban development project centred on a major expansion of the existing public transport network for the whole Paris metropolitan area. Overall, 68 new stations and 200 km of metro lines will be gradually put into service. Among numerous aspects, the project is driven by risk management and neighbourhood disturbance reduction. These...
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Utility Tunneling: A Solution for Managing the Urban Underground Space in China
Abstract: On a global basis, utility tunneling has been used to improve the effective management of urban underground space and to make expansion and maintenance of pipelines and cables safer, more cost effective, and easier. China is the first country to provide the leadership in establishing utility tunneling as a national priority to meet the challenges for congested underground urban conditions. The...
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Design and construction challenges of the refurbishment of the 110-year-old Bosruck rail tunnel, Austria
Abstract: The 4.766km-long, brick-arched Bosruck tunnel was built between 1901 and 1906. The geotechnical conditions were at times extremely adverse. The single-track tunnel passes through long stretches of “Haselgebirge” – a sedimentary rock containing mineral clay, sandstone, gypsum, anhydrite and rock salt as well as through heavily karstified limestone where very high water ingress up to 360 l/s...
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Modelling of surface subsidence induced by tunnelling using Artificial Neural Network
Abstract: There are several empirical, semi-empirical, analytical and numerical approaches available for predicting tunnel subsidence. Herein, new viable approaches are suggested for the prediction of ground surface settlements caused by tunnelling, incorporating artificial intelligence models. Current research is focused on developing a simple method in order to provide a predictive model to estimate...
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Properties of Acrylate Grouts and their Use in Tunnel for Waterproofing and Repair Jobs.
Abstract: Chemical grouts are injected into voids or cracks for several purposes such as waterproofing, consolidation, reinforcement and sealing. Unlike cement grouts which are suspensions of particles carried by a fluid especially used for void filling or reinforcement, chemical grouts are liquids that react to form a solid or a gel. Acrylate grouts are part of this chemical grouts family. They are...
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Experimental Study on the Performance of Grout Mixer with Vibration Filter
Abstract: The grouting is applied to reinforcement or waterproof method by injecting into the ground or structure. Ordinary portland cement is typically used for the grouting method. To inject the grout, water must be mixed the cement which is powdery. The equipment required for this mixing is the grout mixer. When mixing the cement in powder form with water, the particles tend to fock each other. If...
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Wear in Granular Soils: results of a new procedure by using a soil abrasion testing apparatus with a wear disk
Abstract: The wear phenomenon in mechanized excavation machines is very complex. Many parameters play key roles in wear and in EPB machines wear in all areas where there is a continuous friction between ground and steel. Because of the complex nature of phenomenon, to design a laboratory test procedure and a laboratory test device that can provide correct results in terms of predicting of wear is not...
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