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- Title
Dynamic response of subgrade on improved soft ground soil under high-speed train load.
- Authors
HU Zhi; Al Pinbo; PEI Yaoyao; LI Lihua
- Abstract
In order to study the dynamic response rules of subgrade on improved soft ground soil, a tran-nonballasted track-lay¬ered soil coupling dynamic model was established, and Fourier transform and the dynamic stiffness matrix method were applied to solve the model. Then the influence of ram speed, rail irregularity, thickness and modulus of improved soil on dynamic response of subgrade was studied using the proposed model. Attenuation law of vertical dynamic stress n subgrade was analyzed for differ¬ent conditions. The results show that the improved so- effectively reduces vertical dynamic stress on surface of soft soil With n- creasing train speed, the stress reduction is more obvious. It is an effective approach off controlling dynamic response off subgrade on soft so- to property design thickness and modulus off the improved soil.
- Subjects
HIGH speed trains; SOIL dynamics; DYNAMIC stiffness; SOILS; FOURIER transforms; DYNAMIC models
- Publication
China Sciencepaper, 2022, Vol 17, Issue 2, p174
- ISSN
2095-2783
- Publication type
Article