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World Tunnelling Congress
WTCThere are 1984 documents.
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Use of BCN Test for Controlling FRS in Tunnelling Works
Abstract: The use of fiber reinforced shotcrete (FRS) has been widely used for the construction of support tunnels in road, mining and hydroelectric projects in Latin America in the last years. However, tests to control their properties are a permanent problem for both constituents and contractors, because standardized tests require complex and expensive equipment or large and heavy specimens. To...
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Use of bentonite and biodegradable slurry for cobble -rich soil conditioning
Abstract: Cobble-rich soils are always a difficult challenge for EPB-TBM tunnelling and the traditional soil conditioning through water and foam may not lead to suitable results. The addition of bentonite slurries is helpful to solve this problem but may be impaired by environmental regulations, in such cases the use of a biodegradable polymeric slurry may be a viable solution. This paper makes a...
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Use of underground space as renewable energy sourcefor a sustainable society
Abstract: Smart use of underground space as renewable geothermal energy source is an innovative solution for a sustainable society development. Energy geostructures couple the roles of structural supports and geothermal heat exchangers for the structural elements in foundations and shallow underground infrastructures and provide an efficient low-emission solution for heating/cooling operations of...
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Ventilation options for short tunnels - Sustainability, OPEX and Cost Implications
Abstract: Tunnel ventilation provisions in road tunnels are well understood, and international norms have been developed over many years. There are three main ways to ventilate a road tunnel: natural, longitudinal, or transverse, with different options suited to varying tunnel geometries and operational configurations. Each of these systems has its space proofing and CAPEX/OPEX implications. One key...
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Virtual Master Rings - Replacing a tradition
Abstract: When a new tunnelling project starts, it has been a vital tradition for decades to cast and erect master rings horizontally on a flat surface to demonstrate the compliance with dimensional tolerances. Some tenders ask for the erection of two or even three rings upon each other or repeated master ring erections at intervals throughout the project. Especially for large diameters, this is a...
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Water Leakage Characteristics in Deteriorating Steel Segments of Shield Tunnels
Abstract: In shield tunnels with steel segments, water leakage occurs due to defects caused by deterioration of those segments. However, a secondary lining that generally covers the steel segments makes direct inspection of the segments difficult. This study focuses on clarifying the deterioration characteristics of the steel segments and the causes of water leakage. We investigated seven communication...
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Water resource protection and eligibility for financing in underground projects
Abstract: In underground projects, thoroughly assessing the water related issues early in the project cycle would substantially reduce risks for cost and time overruns, environmental damage, mitigating Climate Change, increasing the economic and environmental feasibility, as well as the public consent. Compliance on regulations for eligibility of funding and environmental safeguards is the overarching...
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Weep Hole Design in Water Conveyance Tunnel
Abstract: Water supply mains and inland ware net-working systems require large scale of water conveyance tunnels. Recently, to control flood and measure drought, 11 km of water conveyance tunnel connecting two earth and rockfill dams was constructed in South Korea. The tunnels are generally located in the mountain areas and constructed as drains. Circular concrete liners without drainage system were...
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WestConnex M4 -M5 Link - Construction of the St Peters Interchange Ramps and
Abstract: The WestConnex M4-M5 Link Tunnels D&C project includes 21km of mined tunnels that connect two underground motorways and an underground interchange in metropolitan Sydney, the M4 at Haberfield, and the M8 at the St Peters Interchange (SPI) and the Rozelle Interchange. The project started in 2018 and is due to be completed in 2023. The M4-M5 Link tunnel alignment crosscuts the Woolloomooloo Fault...
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WeView - An Integrated Data and Elaboration System of Global Underground Projects
Abstract: A team of engineers from Webuild has developed an IT integrated platform, WeView, for the collection, processing and transmission of data from all plants, equipment and sensors utilized in a TBM construction site including also geological data, personnel tracking, vehicle tracking, and segment tracking. WeView is designed to help the management to timely control the overall situation and...
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Wireless Optical Displacement Sensor for convergence and divergence monitoring
Abstract: The construction and modification of tunnels brings a requirement for precise measurement of convergence and divergence to safeguard the structure, maintain safety and provide the assurance needed to maintain efficient progress. Established methods include manual measurement using tape extensometers and automated methods using photogrammetry and automated total stations. Drawbacks include the...
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The role of an infrastructure for a social and sustainable development
Abstract: In the decision-making process that underlies the design of sustainable infrastructure, it is becoming fundamentally important to identify the right project, the project that best fits into its territorial context, responds to the needs of the community, generates quality of life benefits, and improves public transport. For that purpose, Italferr has developed operational guidelines for...
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A Study on Advanced Inspection of Reinforced Concrete Lining for Expressway Tunnels
Abstract: Inspections of tunnels managed by East Japan/Central Japan/West Japan Expressway Co., Ltd. are regulated by the Ministry of Land, Infrastructure, Transport and Tourism (MLIT) Road Bureau's Road Tunnel Regular Inspection Guideline, which was revised in February 2019. This revision introduced an advanced scheme for inspecting lining surfaces of unreinforced concrete in tunnels by making them a...
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Construction of REM Project in Montreal
Abstract: The Montreal Réseau Express Métropolitain (REM) is the fourth largest automated transportation system in the world. The design fosters environmentally sustainable transportation. As a single, integrated transportation network, the REM will be connected to bus networks, commuter trains and the Montréal metro. The REM represents construction costs of approximately 6.3 billion Canadian dollars....
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First Subway in the Philippines - Part I General Information and Planning
Abstract: Metro Manila Subway Project (MMSP) is the first planned subway project in the Republic of the Philippines, which is planned to be constructed in Metro Manila. This project is funded by Japan International Corporation Agency (JICA) and is considered as the project that will have a huge impact to Metro Manila in terms of upgrading the transportation standards. Upon completion, this will have an...
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Rehabilitation of Mont-Royal Tunnel
Abstract: The Mont-Royal Tunnel (MRT) is a railway tunnel located in Montreal, Canada. This 100-year-old double track tunnel connects Downtown Montreal to the north side of the Island of Montreal by passing through Mount Royal mountain. The tunnel is approximately 5 km long, 9.6 m wide and 4.4 m high, with a constant 0.6% grade. The tunnel was bored through different types of ground, varied from hard...
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