Convergencias en túnel - Costa Blanca

Key Points

Senceive regional distributor Instop supervised the installation of the monitoring system, which comprised of:

Martorell: 87 ODS sensors, 35 triaxial tilt beam sensors & 9 4-channel VW nodes to extensometers

Costablanca: 99 ODS sensors and 96 triaxial tilt beam sensors

Castelbisbal: 105 ODS sensors

Challenge

As part of Spain’s ambitious Mediterranean Corridor, a number of disused tunnels were being refurbished. Spanish rail infrastructure operator ADIF appointed main contractor Dragados to upgrade three tunnels including the 810 m track tunnel between Martorell and Castellbisbal. The masonry structure had been disused since the 1980s and required relining with 4,500 cubic metres of sprayed concrete, the construction of overhead line electrification and track lowering.

In order to safeguard the structure and the workforce during the construction work, there was a need for a reliable and accurate monitoring programme, but a conventional approach using optical survey methods was not an option due to the nature of the site:

No mains power in the tunnel which is at a remote location

Ongoing construction activity and use of heavy machinery

Conventional monitoring using automated total station was not possible due to no line of sight

Solution

The construction team required real-time 24/7 movement monitoring. They appointed survey and monitoring experts Instop to provide a Senceive wireless remote monitoring solution.

This comprised of a combination of tilt sensors and optical displacement sensors (ODS) to detect rotational movement and convergence.

The ODS method was novel in this application and provides a number of advantages over laser or optical techniques.

Data from the various sensors were transferred from the site via a GeoWAN gateway located outside the tunnel. With no mains electricity available, an advantage over alternative technologies was the ability to power the system using solar panels.

Easily installed by non-specialists, robust enough to last many years without maintenance and with no cables to interfere with other infrastructure, Senceive wireless remote monitoring has proved to be an effective solution.

Outcome

All stakeholders were able to see changes in tunnel cross section from a real-time 24/7 data feed. Construction of the sprayed concrete lining and lowering of the track could therefore continue safely and efficiently with the reassurance provided.

The solution proved highly cost-effective to the client as it was provided on a four month hire basis.

Installations were done in record time at a speed of 4 sections per hour (3 nodes per section) or 100 m/ hour, a complete tunnel in a working day.

Senceive won the 2020 New Civil Engineer Tunnelling Award for Instrumentation and Monitoring for the use of our optical displacement sensor technology on this challenging project.

Sectores de aplicación de los sensores de Senceive y Omnidots

Auscultación vía ferrea

Auscultación de superestructura o vía; peralte, alaveo y perfil longitudinal. Monitoreo de infraestructura. Convergencias, deformaciones y subsidencias en túneles y puentes

Monitorización de taludes

Alerta temprana de movimientos y desprendimientos

Auscultación de puentes

Monitoreo y auscultación de puentes

Monitoreo de túneles

Convergencias
Asentamientos

auscultación para edificiación y excavaciones

Auscultación de edificios

Auscultación de superestructura o vía; peralte, alaveo y perfil longitudinal. Monitoreo de infraestructura. Convergencias, deformaciones y subsidencias en túneles y puentes

Geotecnia

Excavaciones profundas, auscultación y monitoreo, movimientos del suelo y subsuelo, automatización de instrumentación geotécnica; inclinómetros, IPI, piezómetros, células de carga, extensómetros

Auscultación de minas

Monitoreo y auscultación de minas a cielo abierto o subterraneas

Auscultación de carreteras

Control de taludes, firme, tuneles en tiempo real

Patrimonio

Monitorización obra de fábrica para predicción y mantenimiento de edificios y estructuras

Ingeniería civil

Auscultación y monitorización de estructuras, puentes, túneles, pantallas, muros, vuelcos, convergencias, perfiles longitudinales y verticales, cargas, tensiones, pruebas de carga

Infraestructuras especiales

Auscultación de superestructura o vía; peralte, alaveo y perfil longitudinal. Monitoreo de infraestructura. Convergencias, deformaciones y subsidencias en túneles y puentes

Auscultación en topografía

Las nuevas oportunidades del topógrafo en la auscultación y monitorización por sensores

Energía

Monitoreo y auscultación de presas, oleoductos, parques eólicos, chimeneas, estabilidad, deformaciones, presión, tensión, pruebas de carga

Atención Cliente: +34 93 803 95 76

Los pedidos realizados

hasta las 18:00 horas*
se entregarán en 24h**
* En España y Portugal se entregarán al día siguiente. En el resto del mundo entre 5-7 días laborables
** Sujeto a la disponibilidad

Tarifas Instop	Control maquinaria	Reality Capture
Auscultación	Piezas especiales

Empresa

Servicios

Estación Total Leica

GPS Leica

Leica GIS

Niveles Leica

Distanciómetros

Escáner 3D

Control de maquinaria

Ferroviario

Software

BARCELONA
Instop S.L.U.
C/ Narcis Monturiol, 14
Pol. Ind. Plans d’Arau
08787 La Pobla de Claramunt
Barcelona
Tel +34 93 803 95 76
Fax +34 93 805 55 96
E-mail info@instop.es

VALENCIA
Topomarket
Ronda Narcis Monturiol, 4
local 9-A Centro Empresarial Destro
Parque Tecnológico de Paterna
46980 VALENCIA
Tel. +34 961 36 62 58
Fax +34 938 05 55 98
E-mail info@topomarket.com

MALLORCA
Balears
C/ Bartomeu Oliver de Can Tunis, 45
07198 Son Ferriol
Islas Baleares
Tel. +34 971 42 65 32
M. +34 690 84 25 84
E-mail mallorca@instop.es