Monitoring de superestructura Ferroviaria

Challenge

Balfour Beatty on behalf of their client, Norfolk County Council, were contracted to construct £147 million, 20km of dual carriageway called the Norwich Northern Distributor Road (NNDR). This route went very close to Norwich International Airport and joined the Fakenham Road/A1067, north west of Norwich.

As part of the carriageway construction a large structure at Rackheath had to span Network Rail’s line regularly carrying passenger and freight trains between Norwich and Cromer. Due to the close proximity of the construction works to the rail, it was deemed necessary to carry out monitoring of the track bed to ensure no deformation was taking place.

Based upon several successful deployments elsewhere for Balfour Beatty and a pedigree in monitoring many other track bed environments for Network Rail, Senceive were approached to provide their high precision wireless tilt sensors as a monitoring solution. The project started January 2016 and is expected to complete April 2018.

Solution

Senceive proposed monitoring the two rail tracks using 106 wireless triaxial tilt nodes split equally between both the UP line, where sleepers were made from steel, and DOWN line, where the sleepers are mostly made from wood with a few being concrete. The nodes were installed using sacrificial track bed mounting plates on the area of the sleeper immediately off the ballast shoulder, known as the cess, to measure cant and twist of the track bed.

The flat terrain provided ideal conditions for the FlatMesh™ system and data from the wireless mesh network was easily transmitted to two solar 3G gateways. The gateways then used the mobile GSM network to transmit data to a secure cloud server, which could then be viewed by registered users of Senceive’s WebMonitor software.

Movements were detected very early on during monitoring and triggered SMS messages at certain alert levels, which were preconfigured by the customer.

Outcome

The small movements of ±1mm for the UP line and ±5mm for the DOWN line seemed to be fairly regular and were quickly investigated by Senceive’s dedicated customer service and technical team. We worked closely with Balfour Beatty to determine the cause and through careful analysis and site testing, it was proposed that the highly sensitive triaxial tilt nodes were detecting diurnal movement linked to temperature, which varied between the sleeper’s material composition.

It was possible to remove diurnal movement by applying a 24 hour rolling median to the raw displacement data. Therefore, all subsequent movements were easily attributed to rural terrain impacting the stability of the ballast when the occasional train passed by.

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