Using a Tiltmeter to Validate Temporary Support Systems in Excavations

Temporary support systems are critical in maintaining stability during excavation works. These are the structures that protect surrounding assets and ensure safe working conditions for your staff.

In Western Australia’s complex regional environments, design assumptions are rarely sufficient in guaranteeing the performance and compliance of your support systems. To ensure they are performing as intended, validation through a tiltmeter monitoring system is essential.

Monitel designs tailored deep excavation monitoring systems to enable proactive risk management and compliance. We leverage our partnerships with Osprey Measurements, Wisen and Viotel to serve WA clients with leading instrumentation and high precision data.

In this article, we discuss the four key benefits these systems provide. For more information or to arrange a consultation, get in touch.

Temporary Support Systems Must Be Validated

Support of excavation (SOE) systems control soil movement and maintain structural integrity during the excavation process. But their performance is heavily influenced by soil type, groundwater behaviour, depth and external loads.

If one of these factors deviates even slightly, it could be indicative of a developing risk. Lateral wall movement, settlement behind the wall and increased loads on anchors are all dangerous in these contexts.

A deep excavation monitoring system identifies these issues before they develop into structural damage and safety issues. It ensures that your SOE’s performance aligns with design expectations and meets compliance standards.

Using Tiltmeters in Deep Excavation Monitoring

A tiltmeter is a high precision instrument that measures small angular changes in human made structures. Capable of detecting minute shifts in inclination, they’re ideal for long term deformation monitoring.

Monitel consultants frequently deploy tilt sensors in deep excavations, installing them on:

• Retaining walls
• Capping beams
• Struts and bracing systems

This allows us to track rotational movement that could suggest the SOE system is responding differently than expected under load. That’s particularly useful during digging and dewatering, where ground behaviour is constantly changing.

Real Time Data & Proactive Decision Making: Tiltmeters’ #1 Advantage

Continuous, real time data is the main advantage Monitel clients report from their tiltmeter systems. It enables early detection and proactive action, the modern standard for risk management.

Early detection is possible because of a tiltmeter’s capacity to measure minute changes. Such changes are rarely visible during periodic manual inspections and that often means cracking or displacement develop before any intervention can take place.

A tiltmeter will identify small changes and alert engineers when thresholds are exceeded. From there, proactive action can be taken to address those issues before they escalate.

Benefit #2: Validate Design Assumptions in the Field

Using a tiltmeter provides objective evidence of how temporary support systems are behaving under real conditions. That data can be used to validate design assumptions and prove your SOE system’s regulatory compliance.

For example, engineers can confirm:

• Whether wall movements are within predicted limits
• Whether support elements are distributing load as expected
• Whether the system is responding consistently throughout excavation

That feedback loop is essential in complex and high risk projects. Where conditions are changing rapidly, you have the information you need to guide any changes or adjustments.

Benefit #3: Versatility Across Projects

Deep excavation monitoring is a must for many construction, mining and infrastructure projects. A tiltmeter is suitably versatile, deployable in:

• Urban environments
• Tunnel construction or shaft development
• Retaining walls
• Much more

Tilt sensors are particularly effective where access is restricted or constant monitoring is required to meet compliance standards. They can also be integrated into wider systems and used alongside inclinometers or strain gauges to provide a more comprehensive picture of site behaviour.

Benefit #4: Create Safe, Compliant Projects

Proper monitoring contributes to a safe and compliant project

In validating temporary support systems, you don’t just reduce the likelihood of structural failure – you demonstrate initiative when it comes to risk management. This is vital should you project be subject to regulatory inspection or audit.

On more complex sites, this requirement is only greater. A tiltmeter system offers a reliable and scalable way to fulfil your obligations.

Get in Touch to Arrange Ground Movement and Deep Excavation Monitoring

SOE systems are the core of excavation safety. But to ensure maximum performance, they must be validated under real conditions.

Monitel’s tiltmeter monitoring systems offer a precise, real time method for tracking structural movement and verifying the stability of your site. We leverage our partnerships with leading manufacturers to enable proactive risk management on sites across WA.

For more information or to arrange a consultation, speak with Monitel today.