Wave Dynamics GuidesVibration Monitoring Explained
How construction vibration monitoring works: PPV, geophone set-up, BS 5228-2 and BS 7385-2 guidance, trigger levels and reporting.
In Short
Vibration monitoring measures ground or structural vibration from activities such as piling, demolition, compaction and tunnelling, usually as peak particle velocity (PPV) in mm/s. Results are compared with limits set to protect nearby buildings and keep disturbance to occupants reasonable.
- Measured as peak particle velocity (PPV) in three directions.
- Human response guidance comes from BS 5228-2; building damage guidance from BS 7385-2.
- People notice vibration at levels far below those that could damage buildings.
- Real-time alerts let the site change method before limits are reached.
When Is Vibration Monitoring Needed?
Monitoring is common on piling, sheet piling, demolition, basement excavation, rock breaking and heavy compaction, especially near homes, heritage buildings, sensitive equipment, railways and utilities. It is often a planning condition or a requirement of a third-party agreement with a neighbouring owner.
How It Works
A triaxial geophone is fixed firmly to the structure or ground at the point of concern, typically a foundation or ground-floor wall of the nearest building. The monitor records PPV and frequency continuously and stores waveforms of significant events. Good coupling to the structure is essential: a loosely fixed sensor gives misleading readings.
Limits and Trigger Levels
Limits are set for two reasons. To protect buildings from cosmetic damage, guidance such as BS 7385-2 sets values that depend on building type and vibration frequency. To manage disturbance to people, BS 5228-2 gives guidance on perception and complaint. Projects usually set amber and red trigger levels below the limit, so the contractor is warned and can adjust the method early.
Pre-Condition Surveys
Monitoring works best alongside a photographic pre-condition survey of nearby buildings and crack monitoring of existing defects. Together they show whether any change was caused by the works or was already there.
Frequently Asked Questions
What is PPV?
Peak particle velocity is the maximum speed at which a point on the ground or structure moves as a vibration passes. It is measured in millimetres per second (mm/s).
Will vibration I can feel damage my building?
Usually not. People can feel vibration at around 0.3 mm/s, while guidance values for cosmetic damage to buildings are many times higher.
This guide gives general information and is not a substitute for project-specific advice. Requirements change, so always check the current regulations, guidance and your planning conditions. Ask our team about your project.
Jon Maguire (BSc Hons MIOA) brings over 8 years of expertise in acoustic consultancy, specialising in environmental acoustics with a focus on 3D modelling, assessments, and detailed design for industrial, commercial, and energy projects. He has lead noise assessments for key clients while thriving in multidisciplinary environments. Jon’s diplomatic communication skills are ideal for stakeholder consultation.
Jack is a Field Engineer at Wave Dynamics, supporting the delivery of environmental monitoring and acoustic consultancy services through detailed on-site fieldwork. He has hands-on experience in noise monitoring, vibration monitoring, and dust monitoring across a variety of infrastructure, construction, and environmental projects. Jack is involved in the setup, operation, and maintenance of monitoring equipment, ensuring accurate data collection in line with relevant standards and project requirements. He works closely with consultants and project teams, providing reliable field support that underpins high-quality assessments and reporting.
Aidan is the Director for all U.K Operations and has worked in multiple industries including for clients in the UK and internationally operating in the residential, industry, healthcare, education, and construction sectors.
