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Deep Excavations News

Second giant TBM begins work on India’s first undersea rail tunnel

A second large-diameter tunnel boring machine has started excavation on the Mumbai-Ahmedabad High-Speed Rail project, advancing one of the most technically demanding parts of India’s first bullet trai...

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Lima completes tunnel excavation for Peru’s first fully underground metro

Excavation has been completed on Lima Metro Line 2, marking a major milestone for Peru’s first fully underground metro system. The breakthrough of the final diaphragm wall at Station 4 completed the p...

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Debohra completes both tunnel tubes beneath Vienna highlighting low-disruption urban tunnelling

Tunnel boring has been completed on both tracks of Vienna’s U2 metro extension, marking a major milestone for one of the city’s most important public transport projects. The works form part of the wid...

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Polcevera ventilation tunnel completed for Italy’s Terzo Valico project

Excavation has been completed on the 2 km Polcevera ventilation tunnel, a key underground element of Italy’s Terzo Valico dei Giovi and Genoa Junction railway project. The tunnel forms part of a wider...

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Major wastewater tunnel procurement begins in southern Sweden

Swedish regional water utility VA SYD has launched the procurement process for the tunnel and shaft works forming part of the MAXIMA wastewater treatment system. The project will create a new undergro...

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Fatal excavation failure under investigation in Bushwick

A trench collapse at a construction site in Bushwick, Brooklyn, left one worker dead and another critically injured Thursday morning, according to police and city officials. Emergency crews responde...

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Dewatering example on a specific deep well system with GeoStudio

The objective of dewatering is to lower the groundwater table to prevent significant groundwater flow into an excavation, and/or to ensure slope stability. The preferred dewatering system will depend...

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Automating Back Analysis in RS2: A Scalable Workflow for Model Calibration

Back analysis is where geotechnical models stop being purely predictive and start being confronted by observed behaviour. In deep excavations, that test is unforgiving. Small, defensible changes in s...

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Mechanised excavation accelerates Battipaglia–Romagnano rail section with Four Active TBMs

All four tunnel boring machines planned for Lot 1A of the Salerno–Reggio Calabria high-speed and high-capacity railway are now fully operational, marking a critical construction milestone in Southern...

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Dewatering and earth retention solutions at Atlantic Park Surf

Keller provides dewatering and earth retention solutions at a new wave park, located just two blocks from where the Atlantic Ocean and Chesapeake Bay converge. A 2.67-acre surf lagoon joins the beac...

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