Murphy Surveys is dedicated to providing customers with cost-effective project solutions through a mixture of highly skilled personnel, decades of experience and using the right tools for the task at hand.
Our Monitoring Department provides sensor equipment and manual monitoring services for railway, tunnel and shaft, bridge, slope, embankment, building, road, utility, retaining walls and environmental parameters such as noise, vibration and dust.
We have several dedicated staff in the Monitoring Department consisting of:
- Project managers for both on-site and off-site management of manual monitoring and automated monitoring systems including liaising with clients on a day-to-day basis for peace of mind
- Database and processing technicians for management of monitoring databases, websites and reporting
- Monitoring surveyors to provide consistency and precision in manual monitoring projects
- Instrumentation & monitoring technicians to install instruments, sensors, targets and telemetry with significant knowledge in communications, power and fixing requirements
Recent Monitoring Projects
In recent years we have completed monitoring works for Crossrail on C430 Farringdon Advance Works and C410 Bond Street / Tottenham Court Road SCL Tunnel Monitoring. We have also successfully completed the Instrumentation & Monitoring for Vauxhall London Underground Station Upgrade and the Farnworth Tunnels Refurbishment Monitoring project which won ‘Tunnelling Project of the Year’ at NCE Tunnelling Awards in 2016.
Our current running projects consist of Instrumentation & Monitoring for several key clients such as London Underground, Canary Wharf Contractors, Network Rail, Thames Water, Berkley Homes, Wessex Capacity Alliance, Skanska, Multiplex, Mount Anvil and Scottish Power Renewables to mention just a few.
The I&M involved in these projects consist of Automated Total Stations, Precise Wireless Bi-Axial Tilt Sensors, Manual Monitoring Solutions, Inclinometer Monitoring, Noise, Dust and Vibration Monitoring. They are currently monitoring tunnels, roads, bridges, railway infrastructure and Grade II listed structures. Environmental Monitoring (Noise, Dust and Vibration) provide real-time information to the main contractor and consultants on site to allow them to manage their site in a safe and considerate manner.
Railway & Tunnel Monitoring
Geotechnical Instrumentation & Monitoring
Automated & Manual Structural Monitoring
Tilt Sensor Monitoring
Murphy Surveys employ and train 90% of their staff for rail works. Our staff undergo PTS and LUL training for surveying on the railways both underground and over ground. The Monitoring Department have been responsible for implementing many I&M projects for tunnels, railway track and railway assets for both London Underground, DLR and Network Rail. Monitoring surveyors are also proficient in the use of railway measuring devices to carry out pre-construction/demolition surveys and condition surveys.
The Monitoring Department have installed Geotechnical I&M in several large projects over the years including C430 Farringdon, Newfoundland House Project at Canary Wharf and Queenswharf in Hammersmith. These projects consisted of in-place piezometers, manual inclinometer tubes in secant pile walls and strain gauge sensors on temporary structural supports. The Monitoring Department also uses several types of in-place inclinometers or tilt meters where line-of sight is unavailable and conventional automated total stations cannot be utilised.
The Monitoring Department undertakes projects of an automated or manual nature for structural monitoring of buildings, bridges and any structure above or below ground. Our experienced installation technicians can deploy an automated monitoring system within days. Our project managers then liaise with clients and contractors on a day-to-day basis to ensure peace of mind during construction and/or demolition. Experienced monitoring surveyors are deployed for manual monitoring projects to ensure accurate, precise and consistent measurements where an automated system may not be viable.
Tilt sensor monitoring is generally used where sight lines do not allow for conventional automated total station monitoring or where the geometry of the site to be monitored is too difficult to install a site wide monitoring reference network. Murphy Surveys have used tilt sensors in Jubilee Line tunnels, Piccadilly line tunnels, Waterloo & City Line and Victoria line for Vauxhall Station. Tilt sensors have also been deployed for party wall monitoring, façade monitoring and retaining wall monitoring for above ground structures.
Surface & Road Monitoring
Real-time Vibration Monitoring
Real-time Noise Nuisance Monitoring
Real-time Dust Control Monitoring
During tunnelling or pipe laying works there may be a need for surface or road monitoring. This can be done manually or using automated total stations depending on the extent of the construction works. Murphy Surveys have undertaken automated main road monitoring on projects such as Vauxhall and Farnworth. For major construction or demolition projects where there is a possibility of heave or settlement from mass change in volume, there can be a requirement for site perimeter pavement monitoring.
Murphy Surveys have carried out structural vibration monitoring for Crossrail, London Underground and various construction and demolition sites in the UK and Ireland. The systems can be deployed rapidly and all data is sent via cellular network to a central database where data analysis can be carried out by our processing technicians. Real-time alarm messages are sent upon a trigger breach to the main contractor and/or consultants to allow them to carry out mitigating procedures to the nearest minute.
Noise nuisance is crucial when demolition or construction is taking place in major cityscapes and townships. Murphy Surveys offer real-time noise monitoring to suit all needs of our clients. Pre-trigger alerts can be sent instantaneously to main points of contact on site so that mitigating procedures can be put in place to prevent a full trigger alert. This can save the main contractor £1000s in fines when implemented correctly.
Predicting the level of dust emission is extremely difficult because of the complex nature of mineral operations and the variable dispersion and dilution characteristics of dust in the air. We offer a dust monitoring service using fully automatic environmental dust monitors. The instrument is a light scattering device capable of continuous measurement of total suspended particulates. The dust monitors can be set up for remote sampling, with all measured data sent via modem to a remote PC. Downloading of data is carried out by Murphy Surveys for further analysis and reporting on a regular basis.