Free tunnelling engineering tools
Free concept-design tools for bored and mined tunnels — settlement, ground support, cost and carbon.
Common questions
CalcForge's tunnelling tools support concept-stage design and cost estimating for bored and mined tunnels. The Tunnel Ground Settlement & Damage calculator uses the Burland method to predict surface settlement and building damage above a tunnel drive — the usual starting point once an alignment is fixed. The Mined Tunnel Support calculator sizes an SCL support using the RMR89, RMR14 and Q rock mass classification methods, for ground where TBM boring isn't the chosen method. Pipe Jacking draws on a database of past project references to size a jacked pipe crossing. Once a scheme is defined, the Tunnel Cost calculator generates a cost estimate for the tunnel or shaft, the Tunnel Carbon calculator estimates the CO2 emissions the works will create, and the Worksite Planner predicts the TBM size, launch shaft and surrounding site footprint needed to build it. All six tools are free to use with no sign-up.
Yes. Every tool linked from this page runs a free calculation with no sign-up required. Creating a free account additionally lets you save a design and, on most calculators, export a PDF report — a small number of deeper analysis features are reserved for a paid tier, noted on that calculator's own page.
You don't need to be a developer to publish one. Our Python for Civil Engineering certification (enrol here) walks you through building and publishing four tools like the ones on this page, using the same open-source engineering libraries CalcForge itself is built on.