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RESILIENT MODULUS OF SOFT SOIL BENEATH HIGH-SPEED RAIL LINES.
| 题名： | RESILIENT MODULUS OF SOFT SOIL BENEATH HIGH-SPEED RAIL LINES. |
| 作者： | Heelis-M; Dawson-A; Collop-A; Chapman-D; Krylov-V |
| 关键词： | ALLUVIUM-; DESIGN-; HIGH-SPEED-TRAINS; LAND-WATER-MARGINAL-AREAS; MATHEMATICAL-MODELS; MATHEMATICAL-PREDICTION; MEASUREMENT-; MODULUS-OF-RESILIENCE; RAILROAD-TRACKS; SOFT-SOILS; STIFFNESS-; SUBGRADE-RAILROAD-TRACKS |
| 摘要： | Modern high-speed rail lines are being built increasingly on marginal land, to reach city centers while avoiding housing areas. Often this land is composed of soft alluvial soils, which exhibit a low resilient modulus. The measurement, prediction, modeling, and implications of resilient modulus values for such subgrades are discussed. Measurement considers the use of repeated-load triaxial testing, resonant column, and in situ methods, illustrating these with sample data. Prediction draws on both analytical and finite-element techniques to illustrate the critical speed (the bow-wave effect) and how it is influenced by resilient modulus. Modeling reveals the available relationships--and their limitations--for deriving subgrade stiffness in this dynamic situation. Implication then uses these to define the relevant effects of resilient modulus values on design problems. |
| 总页数： | Transportation Research Record. 1999. (1687) pp39-46 (12 Fig., 3 Tab., 12 Ref.) |
| 报告类型： | 科技报告 |
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