Monitoring for tunnels
The complete solution for monitoring in a tunnel environment
The constantly evolving developments in towns and cities can congest areas leaving no space for future development or for the existing infrastructure and utilities to function. The solution in many urban areas is subterranean expansion such as tunnelling projects, creating space above and moving infrastructure below. However, these spaces are often hazardous environments, failure to monitor any affected areas or assets would endanger construction workers and any effected assets within the zone of influence of the tunnel.
Deformation monitoring provides real-time information about ground movements and tunnel distortions (e.g. displacement, ovalisation, convergence), allowing rapid and critical decisions to ensure the highest safety and effective risk management.
Total monitoring is the combination of data from geodetic monitoring sensors (total stations, GNSS, levelling or InSAR) with geotechnical and environmental sensors (tilt sensors, strain gauges, weather stations, etc.) and interferometric radar. It provides the complete picture about events occurring helping a greater understanding of the influence from construction or related activities. This is particularly critical when the tunnel excavation intersects with another tunnel structure, railway line, pipeline or passes beneath a heritage structure.
Why monitoring is beneficial in tunnels:
- To record ground deformation before, during and after tunnel construction: excavation of the ground for a tunnel creates a low-pressure area which the surrounding material will attempt to move into to equalise. Therefore, a tunnel needs to support this to maintain its void.
Engineers can be informed about the normal movements of the ground, deformation during construction and longer term once the structure is completed. This allows engineers to balance changes in pressure, which may put a critical amount of strain and tension on the tunnel structure, preventing distortions or even collapse. - To protect adjacent assets: any excavation or construction that takes place near existing assets may cause movements that damage them, being aware of the first signs of movement via monitoring data allow for preventative/corrective actions. This is particularly critical when the tunnel excavation intersects with another tunnel structure, railway line, pipeline or passes beneath a heritage structure.
- To detect changes in shape and structure during tunnel renovation: modernisation processes within the tunnel such as replacement or re-lining may introduce increased stress on the tunnel structure, causing movements or distortions. At this time it is critical to understand the effects of the works on the tunnel shape and structure.
- To provide structural health monitoring: during the lifecycle of the structure from construction, assessing its performance and degradation over time, potentially extending the lifespan of structures or providing information for change in future designs.
- To document historical change: Structural records associated with the deformation caused by tunnel construction or modification in case a disaster occurs.
- To assess the impact of environmental change: upon the construction site and the inverse influence of the construction on the local environment.
This video presents typical generic examples of monitoring installations in a tunnel, yet every monitoring project requires its own specifically assessed and designed monitoring system thus specialists should be consulted before any installation.
Casos de Estudio
Underneath King’s Cross redevelopment
Ensuring safety in London’s underground with a tailored monitoring solution
Ensuring safety in London’s underground with a tailored monitoring solution
Monitoring Australia's Biggest Transport Project
As excavation and construction barrel ahead on the Sydney Metro, a small and vital team of engineers have been quietly navigating the crowds and rumbling trains that define Sydney’s Central Station.
As excavation and construction barrel ahead on the Sydney Metro, a small and vital team of engineers have been quietly navigating the crowds and rumbling trains that define...
Monitoring Along the Construction Site of the Warsaw Metro Line 2
3D deformation monitoring of an urban area along the construction site of the Warsaw Metro Line.
3D deformation monitoring of an urban area along the construction site of the Warsaw Metro Line.
Productos de software
Leica GeoMoS
Solución de software de auscultación automática flexible.
Solución de software de auscultación automática flexible.
Leica GeoMoS Edge
Software de monitorización para controlar de forma autónoma sensores y un registro de los datos en el terreno sin interrupciones.
Software de monitorización para controlar de forma autónoma sensores y un registro de los datos en el terreno sin interrupciones.
Leica GeoMoS Now!
Analice y visualice datos de auscultación desde cualquier sitio.
Analice y visualice datos de auscultación desde cualquier sitio.
Productos de hardware
Estación Total para Auscultación Leica Nova TM60 – Contole todo.
La robusta, precisa y duradera estación total robótica Leica Nova TM60 ayuda en los proyectos de auscultación siempre que se necesita para tomar datos de forma segura y continua. Viene con una firme promesa: información e informes en tiempo real en los que siempre puede confiar, pues le ayudan a tomar decisiones informadas a tiempo y con tiempo.
La robusta, precisa y duradera estación total robótica Leica Nova TM60 ayuda en los proyectos de auscultación siempre que se necesita para tomar datos de forma segura y...
Leica ComBox60
Un dispositivo autónomo inteligente para la gestión de las comunicaciones y del consumo eléctrico.
Un dispositivo autónomo inteligente para la gestión de las comunicaciones y del consumo eléctrico.
Sistemas de auscultación geotécnica
Medición con sensores geotécnicos automatizados y adquisición de datos
Medición con sensores geotécnicos automatizados y adquisición de datos