OpenTunnel

OpenTunnel Designer is Bentley Systems’ specialized application for the modeling and analysis of tunnel structures, providing a unified environment for tunnel geometry and structural engineering. At Hertford Systems, we leverage OpenTunnel to help engineering teams design safer, more efficient underground infrastructure with seamless data integration.

What is OpenTunnel?

OpenTunnel Designer is Bentley Systems’ first purpose-built application for the modeling and design of tunnel structures, enabling engineers to create intelligent 3D digital models of underground infrastructure. It integrates specialized tunnel modeling workflows with structural analysis, allowing teams to manage complex geometries—from circular to multi-centered shapes—within a single environment. By connecting design data with geotechnical and roadway information, OpenTunnel ensures that underground structures are perfectly aligned with the surrounding civil environment. The platform supports modern BIM and digital twin workflows, helping infrastructure owners and engineering firms reduce project risk and improve the precision of tunnel delivery.

OpenTunnel provides a comprehensive solution for tunnel design and analysis, allowing engineers to develop highly detailed models of linings, excavation shapes, and tunnel components. Built on Bentley’s advanced modeling technology, OpenTunnel combines geometric modeling with structural verification to support every phase of tunnel development.

The software enables designers to create accurate tunnel alignments, manage complex reinforcement layouts, and integrate tunnel infrastructure with surrounding subsurface assets. By connecting design data with analytical engines, OpenTunnel improves visibility across project stakeholders and supports better decision-making throughout the tunnel lifecycle. Using OpenTunnel, teams can work more efficiently while ensuring compliance with international tunneling standards and rigorous project requirements.

OpenTunnel supports a wide range of underground infrastructure projects across both transportation and utility networks. Key applications include:

  • Road and rail tunnel design and alignment planning

  • 3D modeling of complex tunnel geometries and cross-sections

  • Analysis of segmental and cast-in-place tunnel linings

  • Integration of tunnel structures with geotechnical strata

  • Planning of excavation sequences and support systems

  • Coordination of tunnel systems with roadway and rail corridors

  • Digital twin workflows for underground asset management

  • Structural verification of tunnel reinforcement and components

These capabilities allow engineers and planners to design tunnel systems that are more resilient, cost-effective, and technically precise.

Watch a introductory video for OpenTunnel

View the product video on YouTube to learn more about its capabilities, workflows, and use cases.

Download OpenTunnel DataSheet

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