HomeBusinessPerformance modelling of Tensar reinforced soil walls under high-speed rail impact loading

Performance modelling of Tensar reinforced soil walls under high-speed rail impact loading


Technical Seminar at Railtex/Infrarail 2021

Wednesday 8 Sept 2021 – 14:30

Dr Basil Ogunmakin, Associate Geotechnical Engineer, Tetra Tech Coffey

Dr Basil Ogunmakin of geotechnical engineering consultant Coffey, a Tetra Tech company, will make a guest appearance in the Rail Business Daily Technical Seminar Theatre at Railtex/Infrarail to present a talk entitled:

Performance modelling of Tensar reinforced soil walls under high-speed rail impact loading

Dr Basil Ogunmakin, Coffey.

The application of reinforced soil walls has been used extensively in close proximity to normal speed rail lines. However, further ‘engineering numerical justification’ was requested by the client for consideration within the high-speed rail corridor.

Load-bearing reinforced soil walls can cut construction costs by up to 75 per cent and halve build times compared with traditional solutions, while being robust and low-maintenance.

Reinforced (or mechanically stabilised) soil is becoming a standard way of forming cost-effective walls and bridge abutments on roads and railways, instead of the more traditional options that frequently involve piling and reinforced concrete.

The approach uses layers of geogrid to reinforce soil, increasing bearing capacity and increasing resistance to differential settlement. Reinforced soil structures have lower bearing pressures, which can eliminate the need for expensive foundations.

Tensar partnered with Coffey Geotechnics, together with input from the client, to formulate an appropriate model that would allow comparison of conventional reinforced concrete walls against the alternative reinforced soil option.

The model was successfully implemented, evaluating the behaviour of a Tensar reinforced soil wall subject to impact loading due to high-speed train derailment, which satisfied the no-collapse criterion.

Experts from Tensar will be on hand to explain the benefits of reinforced soil on stand F50 in hall 12.


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