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Oxford station upgrade: Trial holes drilled after complex utility diversions cause delays Trial holes are being carried out to inform the best route for complex utility diversions that have delayed Network Rail’s £161M project to revamp Oxford’s railway station. Network Rail and its contractors were forced to postpone the #replacement of the railway bridge over Botley Road – a key element of the station upgrade – this summer due to the complexity of #rerouting the #utilities. The #railwaycompany said that work to complete the #utilitiesdiversions could not be completed in time, “despite concerted effort by all organisations involved”. This included diversions of the mains #watersupply and sewer system. Thames Water is now excavating the trial holes along Botley Road on behalf of Kier Group – Network Rail’s principal contractor – that will collect information on the ground conditions and services below the road. Thames Water is expected to take five weeks to complete the work, which will take place on weekdays only. Since the summer, Network Rail has also been working with #stakeholders to try and secure agreement to identify alternative locations for the diversions of key utilities that serve #Oxford and #Oxfordshire. A Network Rail spokesperson said that there are “a number of challenges” with ground conditions and the subsurface at the site, the first being the quantity of utilities present beneath it. Another major challenge is a brick arch that was discovered underneath Botley Road in summer 2023, that was not previously recorded. The arch is believed to be #Victorian and was placed there to manage water levels. As such, the impact of removing it was unknown. On top of this, the area around Botley Road is prone to flooding due to the level of water table. An additional problem is that the ground conditions in the area are made up of Oxford #Clay, which historically presents challenges with construction projects due to its #soft and #porous nature. Following completion of the physical #trialhole works that will provide more information about the tricky ground conditions, Thames Water and Kier will require a further four weeks to validate the designs, cost, and programme to carry out the diversions. Preparation for the diversion of utilities, such as #water, #gas, #electricity and #broadband from under the road around the #bridge area began in November 2022. The Oxford Corridor Phase 2 project to upgrade the Oxford railway station will involve the construction of a new track, platform and accessible entrance on the west side of the station. The new #track and #platform will improve the safety of the line, create capacity for additional Oxford to Birmingham passenger services, and reduce journey times by up to two minutes. Read more: ⬇ 🔗 https://lnkd.in/efdeFeuQ 🔗

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