Tailored Monitoring in Construction: Optical, Wireless, or an Integrated Approach?
Monitoring during construction is a critical component of any project, ensuring the safety and stability of both the structure under construction and the surrounding environment - both during and after completion. As monitoring requirements can vary greatly depending on project type, site conditions, and client needs, a tailored approach often involves a combination of traditional optical and modern wireless solutions. This synergy enhances data accuracy, frequency, and accessibility, helping stakeholders make informed decisions throughout the construction lifecycle.
Vibration Monitoring:
Vibration monitoring involves the use of sensors to measure vibration levels generated by construction activities such as drilling, demolition, and excavation. Monitoring these vibrations ensures they remain within acceptable limits, preventing damage to nearby structures. Additionally, this data helps identify the source of any damage and informs the development of mitigation strategies.
(Vibration monitor installed on basement structure)
Structural Monitoring:
Structural monitoring solutions are typically customised to the specific requirements of each project. These may include traditional (optical) monitoring methods, wireless sensor technologies, or a hybrid of both. Each method offers unique strengths, and together they provide a comprehensive monitoring solution.
Traditional
(Optical) Monitoring:
Traditional monitoring relies on survey-grade total stations and fixed control points - such as prisms, reflective stickers, or monitoring screws - to detect structural movements. Regular measurements track positional changes, making this method ideal for building retention systems or monitoring adjoining properties within the construction influence zone. One key advantage is the high precision and reliable baseline data optical monitoring provides, which is essential for long-term projects or those with strict movement tolerances.
(Fixed L Bar Prism and Retro Sticker often used for optical monitoring)
Wireless Monitoring: Triaxial Tilt Sensors:
For high-frequency or real-time monitoring needs, wireless triaxial tilt sensors offer a powerful solution. These sensors utilise three accelerometers to measure tilt in three directions, providing continuous data on structural movement and deformation. The information is wirelessly transmitted to a central monitoring system, where it is analysed for anomalies and used to generate real-time alerts for site personnel. The advantages of wireless systems include:
- Real-time data access for timely decision-making
- Remote monitoring capabilities, reducing the need for site visits
- Scalability to cover large or complex sites
- Increased safety, minimising human exposure to hazardous areas
(Tilt Sensor installed on rail sleeper)
The Power of Combining Methods:
Combining traditional and wireless monitoring methods enables a comprehensive understanding of site conditions. Optical monitoring provides highly accurate baseline and long-term data, while wireless systems offer continuous, real-time insights. Together, they enhance project safety, efficiency, and data confidence.
An integrated monitoring strategy allows for:
- Early detection of structural issues
- Reduced risk to adjacent buildings and infrastructure
- Data-driven decision-making
- Improved regulatory compliance
Collaboration for Optimal Solutions:
Effective monitoring plans are often developed by Geotechnical Engineers, but successful implementation relies on collaboration between clients, monitoring specialists, and technology suppliers. At Bennett + Bennett, we work closely with all stakeholders to deliver tailored solutions that address each project’s unique challenges and goals.
By embracing both traditional and wireless monitoring technologies, construction projects can achieve greater oversight, minimise risks, and ensure the long-term stability of structures and surrounding environments.