Segment Lining — Ring Build Time & Cycle
Ring Build Time & Cycle for segmental tunnel lining production and supply.
Single-shield TBMs alternate bore and build — the erector operator is as schedule-critical as the cutterhead. Crews that shave ring builds from 35 to 25 minutes add a kilometre to a year; the double-shield's overlap of the two phases is this calculator's entire sales pitch.
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.
Ring Build Time & Cycle for segmental tunnel lining production and supply. A free tbm performance & tunnelling tool — no sign-up, no upload, instant results in your browser.
About Segment Lining — Ring Build Time & Cycle
Segment Lining — Ring Build Time & Cycle computes the governing relationship cycle = build + bore + regrip; best = 1440/cycle × ring live as you type. Single-shield TBMs alternate bore and build — the erector operator is as schedule-critical as the cutterhead. Crews that shave ring builds from 35 to 25 minutes add a kilometre to a year; the double-shield's overlap of the two phases is this calculator's entire sales pitch. 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 Segment Lining — Ring Build Time & Cycle
- 1Enter your values — Ring build time, Boring time per stroke, Regrip/reset time, Ring length (sensible defaults are pre-filled).
- 2Read the live results: Full cycle, Best-case advance.
- 3Check the "with your numbers" line to see cycle = build + bore + regrip; best = 1440/cycle × ring substituted step by step.
- 4Adjust inputs until the scenario matches yours, then copy or share the result.
Why use Segment Lining — Ring Build Time & Cycle?
- ✓Instant, free and private — every calculation runs client-side in your browser; nothing is uploaded
- ✓Built on the stated formula cycle = build + bore + regrip; best = 1440/cycle × ring with authoritative sources cited on the page (ITA/BTS — Mechanised tunnelling guidelines; Maidl et al., Mechanised Shield Tunnelling, 2nd ed.)
- ✓Single-shield TBMs alternate bore and build — the erector operator is as schedule-critical as the cutterhead.
- ✓Niche-specific defaults give a meaningful worked answer the moment the page loads
Frequently asked questions
What formula does the segment lining — ring build time & cycle use?+
It evaluates cycle = build + bore + regrip; best = 1440/cycle × ring, exactly as published. Sources: ITA/BTS — Mechanised tunnelling guidelines; Maidl et al., Mechanised Shield Tunnelling, 2nd ed.. 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?+
Single-shield TBMs alternate bore and build — the erector operator is as schedule-critical as the cutterhead. 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?+
Ring Build Time & Cycle for segmental tunnel lining production and supply. A free tbm performance & tunnelling tool. Crews that shave ring builds from 35 to 25 minutes add a kilometre to a year; the double-shield's overlap of the two phases is this calculator's entire sales pitch. 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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