Tunnel Logistics — Volume Loss & Settlement
Volume Loss & Settlement for TBM drive planning.
The Gaussian settlement trough is urban tunnelling's contract with the surface: volume loss under 1% and the buildings above never notice. Every face-pressure decision upstream cashes out in this millimetre figure — it is the number the monitoring section reviews at 6 a.m. daily.
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.
Volume Loss & Settlement for TBM drive planning. A free tbm performance & tunnelling tool — no sign-up, no upload, instant results in your browser.
About Tunnel Logistics — Volume Loss & Settlement
Tunnel Logistics — Volume Loss & Settlement computes the governing relationship S_max = V_loss / (√(2π)·i), i = k·z₀ [Gaussian trough, Peck/O'Reilly] live as you type. The Gaussian settlement trough is urban tunnelling's contract with the surface: volume loss under 1% and the buildings above never notice. Every face-pressure decision upstream cashes out in this millimetre figure — it is the number the monitoring section reviews at 6 a.m. daily. 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 Tunnel Logistics — Volume Loss & Settlement
- 1Enter your values — Bore diameter, Volume loss, Axis depth, Trough width parameter k (sensible defaults are pre-filled).
- 2Read the live results: Settlement volume, Max surface settlement.
- 3Check the "with your numbers" line to see S_max = V_loss / (√(2π)·i), i = k·z₀ [Gaussian trough, Peck/O'Reilly] substituted step by step.
- 4Adjust inputs until the scenario matches yours, then copy or share the result.
Why use Tunnel Logistics — Volume Loss & Settlement?
- ✓Instant, free and private — every calculation runs client-side in your browser; nothing is uploaded
- ✓Built on the stated formula S_max = V_loss / (√(2π)·i), i = k·z₀ [Gaussian trough, Peck/O'Reilly] with authoritative sources cited on the page (Maidl et al., Mechanised Shield Tunnelling, 2nd ed.; ITA/BTS — Mechanised tunnelling guidelines)
- ✓The Gaussian settlement trough is urban tunnelling's contract with the surface: volume loss under 1% and the buildings above never notice.
- ✓Niche-specific defaults give a meaningful worked answer the moment the page loads
Frequently asked questions
What formula does the tunnel logistics — volume loss & settlement use?+
It evaluates S_max = V_loss / (√(2π)·i), i = k·z₀ [Gaussian trough, Peck/O'Reilly], exactly as published. Sources: Maidl et al., Mechanised Shield Tunnelling, 2nd ed.; ITA/BTS — Mechanised tunnelling guidelines. 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?+
The Gaussian settlement trough is urban tunnelling's contract with the surface: volume loss under 1% and the buildings above never notice. 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?+
Volume Loss & Settlement for TBM drive planning. A free tbm performance & tunnelling tool. Every face-pressure decision upstream cashes out in this millimetre figure — it is the number the monitoring section reviews at 6 a.m. 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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