Proceedings of the Institution of Civil Engineers - Geotechnical Engineering· 2014Q2
Evaluation of train-load-induced settlement in metro tunnels
- 55citations
- Q2SCImago
- 2014year
Short summary
A new model predicts cumulative tunnel settlement from train loads, showing 15.5 mm over 8 years, with 60% occurring in the first 6 months.
AI-generated from the title and abstract; the full text is not read.
Key points
- A simplified mechanical model accounts for rails, bolts, ballast, lining, and foundation in train-load settlement analysis.
- Two-dimensional finite-element calculations determine initial and dynamic subsoil stress states.
- Cumulative settlement reached 15.5 mm after 8 years.
- 60% of the total settlement occurred within the first 6 months of operation.
AI-generated from the title and abstract; the full text is not read.
Abstract
Based on a simplified mechanical model, the stress distribution pattern in subsoils around tunnels due to train movement is investigated. In this model, the effects of rails, connection bolts, ballast, lining and foundation are taken into account. The initial stress state and the dynamic stress state of the subsoils induced by train loading are obtained from a two-dimensional finite-element calculation. After combining the above results with the empirical equation proposed by Chai and Miura in 2002, the cumulative plastic strain of subsoils and the long-term settlement of tunnels are obtained. The results show that the cumulative train-load-induced tunnel settlement increased, but at a decreasing rate. The cumulative settlement was 15·5 mm after 8 years, 60% of which occurred within the initial 6 months.
The authors' abstract, as published at the source. Proceedings of the Institution of Civil Engineers - Geotechnical Engineering, 2014 · DOI ↗
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Field: General Engineering
General EngineeringEngineering