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List of products by author: M. Comulada
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Caracas Line 5 maximising potential of EPB shield technology in extreme urban conditions
Abstract: Metro Caracas Line 5 is a successful representative case of urban shield tunnelling where challenging situations were overcome by maximising the capacities of EPB shield technology and without the execution of additional ground treatments. The paper presents different case studies of shield drives under buildings and bridge foundations in soils. The approach followed for the calculation,...
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Enhancing EPB shield drives in rock and mixed face conditions in Panama City
Abstract: Several known EPB shield reference projects in rock can be picked out worldwide. However fewer are the large diameter EPB shield drive projects excavated in rock under the groundwater table in densely populated areas for metro projects.The excavation of the first metro line in Panama City sets a benchmark in rock shield tunnelling due to its typically urban area boundary conditions with strict...
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EPB Shield Tunnelling Through a Volcanic Chain In Mexico
Abstract: The contribution gives insight to the challenges and respective engineering measures in the MexicoToluca Interurban Train tunnel project. Each of the twin tunnels has a length of 4.7 km and is excavated with two EBP shield machines of 8.57 m diameter. The tunnel overburden varies from 1 diameter up to 130 meters and hydrostatic pressures up to approximately 6.0 bar are expected. The geology of...
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First experiences gained with the hybrid EPB technology in the Rio de Janeiro sands
Abstract: The shield-driven tunnel of Metro Rio Line 4 between the General Osório II and Gávea stations has an approximate length of 5.2 km. The double-track tunnels have an internal diameter of 10.33 m with a 0.40 m thick segmental lining. The excavation is carried out using an Earth Pressure Balanced shield with an excavation diameter of 11.53 m.
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Shield urban tunnelling developments applied for the extension of Sao Paulo´s Metro
Abstract: Sao Paulo´s Metro Network comprises five lines in service with a total extension of 107 km for one of South America´s most boosting cities with a population of over 11 million inhabitants. The network can be considered to still be in its early stages after the first line was constructed in 1968 and it is presently undergoing an extension. Whilst Sao Paulo´s settlement-prone Tertiary soils and...
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Slurry Properties and Operation Modes with VD Shield Technology to Handle Varying Ground Conditions at the...
Abstract: The Variable Density shield drives at the Forrestfield Airport Link tunnel project in Perth cross varying soil conditions composed by different types of sand formations and also by more cohesive clogging-prone formations. The present contribution will show how for the excavation under the Perth International Airport premises in such varying ground conditions there are no perfect, but rather...
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