The Research of Capacity Control Standard in Bridge Transition Section Subgrade Based on Measured Dynamic Stress

DOI

10.2991/emeit.2012.187How to use a DOI?

Keywords

Existing railway, Bridge transition section, Control standards, Bearing capacity

Abstract

The dynamic stress in existing bridge transition section of often bigger than ordinary roadbed due to its stiffness irregularity, so using the ordinary subgrade bearing standard as bridge transition section standard is inappropriate. Based on the measured dynamic stress in Xin-feng river bridge transition section, related standard for raising speed and Boussinesq’s answer for stress in subgrade, Evd value and bearing standard in transition section subgrade are derived. Research shows that, Evd value control standard is not than 55MPa(fine-grained soil)and not less than 40MPa (coarse-grained soil). The bearing capacity control standard is not less than 210kPa for surface layer of subgrade and 180kPa for bottom layer of subgrade, which are 30kPa bigger than ordinary subgrade. The research provides a standard basis for reinforcement in existing railway bridge transition section.

Copyright

© 2012, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Xiushao Zhao
AU  - Linli Mo
AU  - Wei Liu
AU  - Chenggang Ai
PY  - 2012/09
DA  - 2012/09
TI  - The Research of Capacity Control Standard in Bridge Transition Section Subgrade Based on Measured Dynamic Stress
BT  - Proceedings of the 2nd International Conference on Electronic & Mechanical Engineering and Information Technology (EMEIT 2012)
PB  - Atlantis Press
SP  - 870
EP  - 873
SN  - 1951-6851
UR  - https://doi.org/10.2991/emeit.2012.187
DO  - 10.2991/emeit.2012.187
ID  - Zhao2012/09
ER  -