Geomechanics.io

  • Free Tools
Sign UpLog In

Geomechanics.io

Geomechanics, Simplified.

© 2025 Geomechanics.io. All rights reserved.

Geomechanics.io

CMRR-ioGEODB-ioHYDROGEO-ioQCDB-ioFree Tools & CalculatorsBlogLatest Industry News

Industries

MiningConstructionTunnelling

Company

Terms of UsePrivacy PolicyLinkedIn
    Projects

    Hanoi Metro tunnel excavation completed: design and TBM notes for engineers

    December 4, 2025|

    Reviewed by Joe Ashwell

    Hanoi Metro tunnel excavation completed: design and TBM notes for engineers

    First reported on Tunnels & Tunnelling International – News

    30 Second Briefing

    TBM Than Toc (Speedy God), a 6.6m-diameter, 100m-long, 850t Herrenknecht machine operated by Ghella, has broken through at Station S12 (Hanoi Station) after a 4km drive installing 1,720 precast segments on Hanoi Metro Line 3. The 12.5km Pilot Light Line 3, Hanoi’s first underground metro, comprises 8.5km of elevated track, 4km of twin-bore tunnels and four underground stations between Nhon and Hanoi Station, and is now over 72% complete. A second TBM, Tao Bao, is currently advancing towards Station S11, maintaining underground excavation momentum.

    Technical Brief

    • Four underground stations – Kim Ma, Cat Linh, Van Mieu and Hanoi – define intermediate access, ventilation and emergency egress nodes along the 4km tunnel.
    • Alignment connects Nhon in Tay Tuu (Nam Tu Liem district) to Hanoi Station, traversing dense urban fabric with associated settlement and utility protection constraints.
    • Elevated–underground interface over 12.5km requires transition structures managing stiffness contrast, groundwater ingress and differential settlement at portal zones.
    • With >72% overall completion, remaining works are likely dominated by station fit-out, MEP integration and systems testing rather than primary excavation.
    • Second TBM Tao Bao advancing toward Station S11 allows parallel headings, shortening programme and distributing settlement risk over time.
    • Experience from this first underground metro in Hanoi will inform design baselines for subsequent tunnelling under similar geotechnical and urban conditions.

    Our Take

    Herrenknecht’s use on Hanoi’s Line 3 adds to a pattern in our database where the same supplier is also providing large TBMs and vertical shaft sinking machines for European power and metro tunnels, signalling its consolidation in complex urban underground works.

    With only 4km of underground tunnel against 8.5km of elevated track on Line 3, Hanoi is following the cost-optimised alignment mix seen in several Asian metros, which typically reserve full TBM drives for the most constrained central corridors.

    Among the 154 Infrastructure stories in our coverage, Line 3’s >72% completion status puts it in the more advanced tier of urban rail projects, meaning procurement and construction risk for contractors like Ghella is now largely replaced by interface, systems integration and commissioning risk.

    Geotechnical Software for Modern Teams

    Centralise site data, logs, and lab results with GEODB-io, CMRR-io, and HYDROGEO-io.

    No credit card required.

    • Save and export unlimited calculations
    • Advanced data visualisation
    • Generate professional PDF reports
    • Cloud storage for all your projects

    Prepared by collating external sources, AI-assisted tools, and Geomechanics.io’s proprietary mining database, then reviewed for technical accuracy & edited by our geotechnical team.

    Related Articles

    DSIT’s CNI cybersecurity drive: design and monitoring lessons for engineers
    Infrastructure
    3 days ago

    DSIT’s CNI cybersecurity drive: design and monitoring lessons for engineers

    The Department for Science, Innovation and Technology has expanded its Cyber Runway Critical National Infrastructure programme with innovation accelerator Plexal to bring more cybersecurity SMEs into protecting UK energy, transport, water and digital networks. The scheme targets operational technology and industrial control systems used in assets such as substations, treatment works and tunnels, where legacy SCADA and remote monitoring are increasingly exposed to cyber-physical attacks. For civil and infrastructure engineers, this signals closer integration of cyber risk into asset design, condition monitoring and resilience planning.

    Gatwick PAS 2080 certification: whole-life carbon lessons for project teams
    Infrastructure
    3 days ago

    Gatwick PAS 2080 certification: whole-life carbon lessons for project teams

    London Gatwick has become the first airport globally to achieve PAS 2080:2023 certification for carbon management across its buildings and infrastructure assets. The BSI-verified standard requires quantified whole-life carbon baselines, option appraisal and reduction pathways for capital works, including terminals, piers, pavements and associated civil engineering. For designers and contractors working at Gatwick, future schemes will need to evidence embodied and operational carbon performance alongside cost, influencing material choices, construction methods and asset renewal strategies.

    Northern Ireland DfI AI road stock-take: asset management lessons for engineers
    Infrastructure
    3 days ago

    Northern Ireland DfI AI road stock-take: asset management lessons for engineers

    Northern Ireland’s Department for Infrastructure has commissioned mapping specialist Gaist to deliver a network-wide digital stock-take of its road assets using AI-based condition assessment. High-resolution imaging and machine-learning classification will be used to catalogue carriageway defects, drainage features and street furniture, creating a georeferenced inventory to support maintenance planning amid a mounting roads backlog. For asset managers and pavement engineers, the move signals a shift towards data-driven prioritisation of resurfacing, patching and drainage interventions across the regional network.

    Related Industries & Products

    Tunnelling

    Specialised solutions for tunnelling projects including grout mix design, hydrogeological analysis, and quality control.

    Construction

    Quality control software for construction companies with material testing, batch tracking, and compliance management.

    QCDB-io

    Comprehensive quality control database for manufacturing, tunnelling, and civil construction with UCS testing, PSD analysis, and grout mix design management.

    HYDROGEO-io

    Comprehensive hydrogeological testing platform for managing, analysing, and reporting on packer tests, lugeon values, and hydraulic conductivity assessments.

    AllGeotechnicalMiningInfrastructureMaterialsHazardsEnvironmentalSoftwarePolicy