Rocky terrain cross-section for geotechnical engineering
Rock Engineering & Geotechnical Consulting

Expert in geotechnical designs.
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We combine decades of rock and soil mechanics expertise with pragmatic engineering judgment. From preliminary studies to detailed design reviews, we deliver geotechnical insights you can build on.

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Why Geotechnical Designs

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Chartered Engineers Australia member with 16+ years designing safe, compliant ground solutions.

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Expertise in rock mechanics, tunnels, foundations, slopes, and deep excavations.

From the Blog

Insights from the field

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"Multiple Graph" approach for Rock Tunnelling Excavation Assessment
Tunnels

"Multiple Graph" approach for Rock Tunnelling Excavation Assessment

"Multiple graph" approach** designed for the **preliminary assessment of rock mass behavior** during tunnel excavation. By utilizing a four-sector logical framework, the method quantifies **rock mass fabric, strength, competency, and self-supporting capacity** to identify potential geological hazards. Key metrics such as the **Geological Strength Index (GSI)** and **Rock Mass Rating (RMR)** are integrated to predict phenomena like **squeezing, spalling, and rockbursts**. This tool serves both the **initial design phase** for hazard detection and the **construction phase** for selecting appropriate support measures at the tunnel face. Through empirical correlations and probabilistic analysis, the approach provides a **systematic way to simplify complex geomechanical data** into actionable engineering insights. The author concludes that while based on simplified assumptions, the graphs offer a **robust and user-friendly tool** for managing risks in underground rock engineering.

26 July 2026

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