TBM Telemetry — Tunnel Carbon per Metre
Tunnel Carbon per Metre for tunnel project performance management.
A metro tunnel embodies 2–4 tonnes of CO₂ per metre, and the cement line dominates — which is why 50%+ GGBS segment mixes became the default carbon move in tunnelling. Owners now score this number in bids; computing it per metre makes the design levers (cement, fiber vs cage, grid power) visible.
Formula
Note: Planning-level tunnelling estimate — actual TBM performance is set by detailed geotechnical baseline data, machine design and the contractor's means & methods. Use for feasibility framing only.
Tunnel Carbon per Metre for tunnel project performance management. A free tbm performance & tunnelling tool — no sign-up, no upload, instant results in your browser.
About TBM Telemetry — Tunnel Carbon per Metre
TBM Telemetry — Tunnel Carbon per Metre computes the governing relationship CO₂/m = cement×0.85 + steel×1.9 + kWh×grid live as you type. A metro tunnel embodies 2–4 tonnes of CO₂ per metre, and the cement line dominates — which is why 50%+ GGBS segment mixes became the default carbon move in tunnelling. Owners now score this number in bids; computing it per metre makes the design levers (cement, fiber vs cage, grid power) visible. Defaults are pre-filled with realistic values for this exact scenario, and the worked example substitutes your numbers step by step so the math is never a black box.
How to use TBM Telemetry — Tunnel Carbon per Metre
- 1Enter your values — Lining concrete, Effective cement (after GGBS), Steel (fiber/cage+bolts), TBM energy and more (sensible defaults are pre-filled).
- 2Read the live results: Embodied + operational CO₂.
- 3Check the "with your numbers" line to see CO₂/m = cement×0.85 + steel×1.9 + kWh×grid substituted step by step.
- 4Adjust inputs until the scenario matches yours, then copy or share the result.
Why use TBM Telemetry — Tunnel Carbon per Metre?
- ✓Instant, free and private — every calculation runs client-side in your browser; nothing is uploaded
- ✓Built on the stated formula CO₂/m = cement×0.85 + steel×1.9 + kWh×grid with authoritative sources cited on the page (Maidl et al., Mechanised Shield Tunnelling, 2nd ed.; ITA/BTS — Mechanised tunnelling guidelines; NTNU prediction model — hard-rock TBM performance)
- ✓A metro tunnel embodies 2–4 tonnes of CO₂ per metre, and the cement line dominates — which is why 50%+ GGBS segment mixes became the default carbon move in tunnelling.
- ✓Niche-specific defaults give a meaningful worked answer the moment the page loads
Frequently asked questions
What formula does the tbm telemetry — tunnel carbon per metre use?+
It evaluates CO₂/m = cement×0.85 + steel×1.9 + kWh×grid, exactly as published. Sources: Maidl et al., Mechanised Shield Tunnelling, 2nd ed.; ITA/BTS — Mechanised tunnelling guidelines; NTNU prediction model — hard-rock TBM performance. The substituted worked example on the page lets you verify every step against the textbook.
How should I read the result — and how far can I trust it?+
A metro tunnel embodies 2–4 tonnes of CO₂ per metre, and the cement line dominates — which is why 50%+ GGBS segment mixes became the default carbon move in tunnelling. Planning-level tunnelling estimate — actual TBM performance is set by detailed geotechnical baseline data, machine design and the contractor's means & methods. Use for feasibility framing only.
When is this calculator the right tool for the job?+
Tunnel Carbon per Metre for tunnel project performance management. A free tbm performance & tunnelling tool. Owners now score this number in bids; computing it per metre makes the design levers (cement, fiber vs cage, grid power) visible. For neighbouring scenarios, the related tools below cover the same engine with different presets.
Do I need to install anything or create an account?+
No. The tool is pure client-side JavaScript: open the page and it works, offline once loaded, with no account, no quota and no data leaving your device.
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