Chiltern Hills

Key Points:

•  4 Ventilation Shafts
• Deepest shaft 78m
• 1000m of Guidewall Installed
• Over 1200 Cased Secant Pile
• Over 1500 Grouted Bore Holes

Resect had the privilege of collaborating with the Keller-VSL Joint Venture (KVJV) on the UK’s largest transport infrastructure project, the High Speed 2 (HS2) rail line.

Since 2019, KVJV had been instrumental in this ambitious endeavour, aimed at enhancing the nation’s rail network by introducing high-speed connections between major cities. From 2020 to 2022, our partnership involved the construction of four circular diaphragm wall shafts, reaching depths of up to 78 meters. These shafts are crucial to the HS2 project, forming part of the tunnel ventilation system and serving as emergency access and egress routes.

As KVJV’s Setting out team Resect helped install all four shafts beginning with the construction of the all-site amenities including Bentonite Tanks and Storage Slabs. In addition to Guidewall installation for a Secant Wall and grouted bore holes, Resect helped construct a Guidewall for the Diaphragm Wall. Our engineers worked alongside KVJV site supervision and London Guidewall Contractors to ensure all accuracies and tolerances were met during the installation process, carrying out extensive setting out and meticulous As-Built work to meet the increased demands of such a high-profile project. Our presence during the shaft works continued into the Diaphragm Wall digging phase as we provided full setting out of each panel and an additional ongoing verticality check to increase safety factor.

Resect Ltd.’s partnership with KVJV on the HS2 project exemplifies our ability to deliver precise, high-quality engineering solutions in challenging environments. Our contributions have helped pave the way for a transformative rail system that will benefit the UK for generations to come