
Carlos Herranz
Mott MacDonald
Event organised by The British Tunnelling Society
Los Angeles Metro is constructing a light rail corridor beneath Downtown Los Angeles - The Regional Connector Transit Corridor (RCTC). To provide operational flexibility, RCTC required a track crossover adjacent to one of the stations. Right of way constraints required the crossover be constructed at relatively shallow depth using Sequential Excavation Methods (SEM), resulting in what is believed to be the largest mined cross section in Los Angeles.
Challenges faced for the SEM cavern design and construction included strict limits for tunnelling induced displacements in surrounding structures and high seismic design loads with 2,500 year return periods. This presentation describes the design approach of the SEM cavern, with an emphasis on the seismic analysis, as well as the actual conditions faced during construction.
Mott MacDonald
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.
A five session course delivered by industry experts to develop in-depth knowledge of health, safety, and wellbeing in civil engineering within the UK.
Are you planning to start a civil engineering degree in autumn 2025 in the UK? The ICE is looking to sponsor people with a passion for civil engineering. To find out more listen to some current scholars.