Vibrationer från stabiliserade järnvägsbankar

Research Project, 2021 – 2024

Society demands for increasing train speeds and weights, that increase loads on existing and new railway lines. Lime Cement Columns (LCC) is a proven ground reinforcement solution for reducing settlements and increasing stability of railway embankments on soft soils whilst also limiting vibrations. Investigation of the effects of higher
loads on LCC reinforced ground is needed for updating regulations. The project aim is to contribute to optimal LCC use by bridging the gap between computed and measured performance of an existing railway in an early stage of
the life cycle.
A research effort in several stages is envisioned. This project -Stage 1- will establish a baseline experimental characterisation of LCC for evaluating the dynamic response of the foundation below a railway section on LCC. The experimental work will be designed with future numerical modelling and field scale validation of the dynamic track
response in mind. As such, it directly aids all ongoing and coming projects on long-term & dynamic response of railway tracks on LCC in soft soils.
An improved ability in design of LCC with dynamic effects included will reduce uncertainty in design. Hence, the amount of embedded CO2-e from lime and cement in the foundation can be minimised whilst ensuring a long lifetime.
Results will be compiled in reports for later implementation in guidelines and regulations, and presented for relevant stakeholders.