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

摘要：

　　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 Boussinesqs 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.

关键词： Existing railway Bridge transition section Control standards Bearing capacity

作者: Xiushao Zhao Linli Mo Wei Liu Chenggang Ai

作者单位: School of engineering and architecture,East China Jiaotong University,Nanchang,Jiangxi,330013,China School of software,East China Jiaotong University,Nanchang,Jiangxi,330013,China

会议类型: 国际会议

会议名称: the 2nd International Conference on Electronic & Mechanical Engineering and Information Technology (EMEIT-2012)(2012年电机工程与信息技术国际会议)

会议地点: 沈阳

会议语种:英文

页码: 870-873

在线出版日期: 2012-09-26（万方平台首次上网日期，不代表论文的发表时间）