Structural Health Monitoring (SHM) is a critical aspect of ensuring safety and performance during tunnel excavation projects. Tunnels are subjected to complex forces and environmental conditions that can lead to structural stress, deformation, and other risks. SHM provides nearly real-time data on the structural behavior of tunnels, enabling engineers to make informed decisions and mitigate potential hazards efficiently. Effective monitoring of tunnel construction is essential to address these challenges.

The Role of SHM in Tunnel Excavation

Tunnel excavation is a challenging engineering task that requires careful planning and execution. The stability of the surrounding soil or rock, as well as the integrity of temporary and permanent support systems, must be continuously monitored to prevent structural failures and ensure safety. SHM systems play a vital role in this process by:

• • Monitoring Tunnel Construction Deformation: Instruments such as extensometers, tiltmeters and IPI in-place inclinometers measure tunnel deformation, ensuring early detection of movements that could compromise stability;

• • Assessing Stress and Strain: Pressure cells and strain gauges monitor the forces acting on the tunnel lining, helping engineers optimize reinforcement strategies;

• • Pore Water Pressure Monitoring: Piezometers measure pore water pressure in the surrounding soil or rock to identify risks such as soil instability or water ingress;

• • Seismic Activity Detection: SHM systems can include sensors to detect seismic events (not supplied by Sisgeo) that might impact excavation safety.

Benefits of Structural Health Monitoring in Tunnel Excavation

By incorporating SHM into tunnel excavation, project teams can:

• • Enhance Safety: Continuous monitoring reduces the risk of accidents and structural failures by providing early warnings of potential issues;

• • Optimize Excavation Processes: Nearly real-time data supports efficient excavation and reinforcement, minimizing delays and cost overruns;

• • Ensure Compliance: SHM helps meet regulatory and safety standards, ensuring the project adheres to local and international guidelines;

• • Extend Tunnel Lifespan: Effective monitoring during construction contributes to the long-term durability of the tunnel.

SISGEO’s Solutions for Tunnel SHM

SISGEO offers a comprehensive range of advanced instruments for structural health monitoring in tunnel excavation projects. From vibrating wire extensometers and inclinometers to automated data loggers and remote monitoring systems, SISGEO’s solutions are designed for precision, reliability, and ease of integration.

With SISGEO’s expertise and cutting-edge SHM technologies, you can ensure the success and safety of your tunnel excavation projects. Contact us today to learn more about our tailored solutions for monitoring tunnel construction.