Infrastructure Tel Aviv Metro Red Line, Israel PROJECT SUMMARY PROJECT: Tel Aviv Metro Red Line - Arlozorov Station DATE: 2017 CLIENT: NTA CONTRACTOR: China Railway Tunnel Group/Solel Boneh Infra-structure JV CONSULTANT: WSP/Parsons Brinkerhoff INSTRUMENTATION: Medidot - Advanced Monitoring Technologies Ltd OVERVIEW MONITORING PRODUCTS USED Arlosorov Station is the fifth in a series of The deflection of the diaphragm walls Biaxial In-Place Inclinometers ten underground stations on the 23km during excavation and tunnelling was The In-Place Inclinometer System (IPI) Red Line, Tel Aviv’s new light-rail system. required as part of safety monitoring measures tilt and was used to measure and design verification. displacements within the diaphragm An underground building of reinforced wall. concrete, flat-slab construction, Steel reservation tubes were cast into comprising of water-tight diaphragm the diaphragm wall cage into which GeoLogger G8 Plus ‘outer-box’ walls, to facilitate temporary inclinometer casing was placed and Multi-channel data logger used to works requirements during ground grouted in. collect data automatically. Purpose excavation, allowing for the construction Geosense Biaxial In-Place Inclinometers designed for geotechnical applications. of the main station inner box. were in-stalled and connected to a The outer box has a series of temporary GeoLogger G8 Plus which allowed the inner struts and waling beams to data to be transferred remotely to the support its walls during the construction NTA data visualisation software. process, requiring careful detailing and construction sequence coordination. The high water-level provide large buoyancy forces on the base of the structure, necessitating a reinforced concrete ‘plug slab’ at the base of the station, restrained by tension piles. Geosense Ltd, Nova House, Rougham Industrial Estate, Rougham, Bury St Edmunds, Suffolk IP30 9ND, England www.geosense.co.uk e [email protected] t +44(0)1359 270457 V1.1 03/2021.