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App189 en lift-height-measurement-bridge-maintenance-work


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App189 en lift-height-measurement-bridge-maintenance-work

  1. 1. A189_eDraw wire sensorwireSENSORLift height measurement in bridge maintenance workAs well as asphalt work, the supports on bridges alsohave to be replaced from time to time. These supportsbear the full weight of the bridge superstructure andmust therefore withstand the highest loads and absorbthe vibrations and elongations of the bridge. The proper-ties of the elastomer bridge bearings can change overmany years, which is why they sometimes need to bereplaced.For this type of maintenance work, the bridge piers arerelieved of any load by using heavy-duty hydraulic jacks.For this, the bridge is lifted by 10mm to 15mm. After themaintenance work has been completed, the superstruc-ture is lowered onto the new supports.A perfectly synchronised lifting process is critical whenlifting bridges in order that no torsional stresses can Benefits for the customer:damage the bridge. A heavy-duty jack is used at each - Simplified mountingcorner of the bridge, with each one connected via a con- - Good price/performance ratiotrol system. Draw-wire sensors are used for each jack, - Very robust sensorswhich notify the current lift height to the controller. - Enables synchronised liftingA major manufacturer of heavy-duty jacks uses Micro-Epsilon’s P60 wireSENSORs for this measurement task,due to its robust design and outstanding price/perfor-mance ratio. Railway bridge 10 mm Bridge bearing Heavy-duty jack Draw wire sensorMICRO-EPSILON A member of micro-epsilon groupKönigbacherstr. 15 Tel. +49 (0) 85 42/1 68-0 Certified DIN EN ISO 9001 : 200094496 Ortenburg/Germany Fax +49(0) 85 42/1 69 90 Modifications reserved / 9781189-A010079FHF