2023年3月4日 · Whilst piles have been successfully designed and constructed in chalk for many decades, the HS2 Colne Valley Viaduct will be required to support the highest speeds and dynamic forces of any UK railway viaduct, in addition to maintaining the tightest of serviceability deflections and dynamic response.

2023年3月4日 · Approximately 1700 bored piles between 1.2 to 1.8m in diameter, with over 700 located beneath the base slab and founded primarily in the Thanet Sand Formation, were designed to resist both tensile axial heave and compressive over-site development (OSD) loads.

High Speed Two (HS2) is the new high speed railway for Britain. Over the next four years we will construct over 2,000 underground piles between Hampstead Road and the northern end of the Euston Approaches to create the foundation for the future railway. What is …

2023年3月4日 · • The largest known pile test programme of bored and CFA piles in extremely weak Mercia Mudstone has been carried out as part of HS2 Phase One Area North. • Both, an effective stress approach and empirical correlation with UCS and GSI have been proposed, for calculating shaft friction.

Bored piles are a commonly used form of foundation that provide support for structures, transferring their load to layers of soil or rock that have sufficient bearing capacity and suitable settlement characteristics. Bored piles require the removal of earth to form a hole for a reinforced concrete pile which is poured in situ.

Britain’s new high-speed railway is being built from the South East to the North West, with HS2 trains connecting the biggest cities in Scotland with Manchester, Birmingham and London.

In November 2019 pile tests (tubular piles, diameter 864 mm) were carried out for open ended piles (pile toe at OD +26.0 m and OD +11.0 m). The piles were installed by vibro driving (TM22 leader rig) followed by impact driving (BSP CG-180) into structured chalk. An additional pile test for closed ended piles was carried out in June 2020.

2023年1月31日 · All 292 concrete piles have now been installed at the site of High Speed 2’s (HS2’s) Colne Valley Viaduct. The foundation works on what will become the UK's longest railway bridge - taking the title from Dundee’s Tay Bridge - were originally started in March 2021 .

2023年1月17日 · Overall, the pile testing programme at Euston demonstrated its effectiveness on multiple fronts: sustainability, construction programming, geotechnical risk management and design validation.

This paper is a case study of the design and construction of Drayton Lane over bridge, HS2 project, UK. At this location, the existing soil strata is Glacial Till followed by Mercia Mudstone. The single pile design was performed in ALP software using characteristic stiffness values for …