Event organised by ICE
Between 15-16th February 2020, a 300m3 failure of part of the westbound A40 Brecon Bypass cutting occurred, leading to the initial closure of all four lanes of the dual carriageways.
The slope failure took place during a month in which Wales was impacted by three named storms, record-breaking rainfall and associated widespread flooding.
The presentation will cover the approach to management of geotechnical risk for the scheme, from desk study through implementation of an on-slope ground investigation and interim risk mitigation, to design and implementation of the remedial measures. The talk will describe the nature and trigger of the failure, the site constraints that were overcome during the site works and finally measures taken to manage residual risk and ensure ease of maintenance.
Mott MacDonald
principal geotechnical engineer
Dr Tom St John CEng MICE is a Principal Geotechnical Engineer at Mott MacDonald and led the geotechnical design of the scheme. Tom is a former chair of the Ground Engineering Group.
Mott MacDonald
graduate geotechnical engineer
Hana Oliphant is a Graduate Geotechnical Engineer at Mott MacDonald. Hana assisted in the design of the scheme and acted as the Designer’s Geotechnical Site Representative during investigation and construction.
Mott MacDonald
graduate civil engineer
Matt Butler is a Graduate Civil Engineer at Mott MacDonald. Matt led the drainage design for the scheme and acted as a Designer’s Site Representative during investigation and construction.
Aimed at students, this series of seven webinars which runs until May 2025 will enable you to learn about professional life from recent graduates from across the industry.
This is an opportunity for Technicians to gather online to discuss ways in which we can help ourselves, each other and the ICE to provide ongoing learning and experience in the wide world of civil engineering.
The last in our series of online events for new engineers and technicians starting their Initial Professional Development (IPD). It is an opportunity to learn about the level of understanding needed for to demonstrate the Knowledge (K) level on an ICE training agreement or mentor supported scheme.
