大轴重重载铁路基床结构及强化措施  

Subgrade Bed of Heavy Haul Railway under Large Axle Load and Strengthening Measures

作　　者：蒋楚生[1] 罗强[2] 李庆海[1] 兰小平[1] 李飞[1] 邓天棋[1] 

机构地区：[1]中铁二院工程集团有限责任公司,成都610031 [2]西南交通大学高速铁路线路工程教育部重点实验室,成都610031

出　　处：《铁道工程学报》2016年第3期17-22,共6页Journal of Railway Engineering Society

基　　金：中铁二院工程集团有限责任公司科技研发项目(13164077);国家973计划课题(2013CB036204)

摘　　要：研究目的:增大列车轴重是提高铁路运输效率的有效途径,已成为世界各国铁路货运的的发展方向。为完善我国重载铁路路基设计技术、优化基床结构强化措施,配合我国铁路技术"走出去"的发展战略,本文在分析阿曼、澳大利亚重载铁路路基结构型式的基础上,基于强度和变形控制准则,进行大轴重条件下重载铁路基床结构的计算分析,并对基床表层强化措施进行探讨。研究结论:(1)阿曼、澳大利亚重载铁路的路基结构能满足当前列车荷载条件下的强度和变形要求,但随着轴重的增大,基床的结构强度及抗变形能力需进一步提高;(2)针对40 t大轴重荷载和不利水环境下基床结构可能出现的服役性能劣化问题,提出了采用高强且具有良好阻水性的沥青混凝土与级配碎石组合作为基床强化表层的优化措施建议;(3)建立的大轴重重载铁路基床结构强度和变形联合计算分析方法,对我国重载铁路路基结构设计技术标准的完善具有指导意义。Research purposes： To increase train axle load is an effective means to improve the rail transportation efficiency and has become the development direction of heavy haul rail freight in the world. In order to perfect the design technology of heavy haul railway subgrade and strengthening measures of roadbed structure of our country, and coordinate the ＂going abroad＂ development strategy of China railway technology, this paper checked and calculated the heavy haul railway subgrade structure under the eondition of large axle load based on the strength and deformation control standards on the basic of the analysis of structural types of haul railway subgrade in Oman and Australia, and discussed the strengthening measures of surface layer of subgrade.Research conclusions： （ 1 ） The subgrade structure of haul railway in Oman and Australia can meet the strength and deformation requirements under the current train load conditions, but the structure strength and anti deformation capacity of subgrade bed should be improved subgrade bed service performance with the increase of axle load. under the conditions of 40 t （2） axle Aiming at the potential deterioration problem of weight and adverse water environment, the optimization recommendation of strengthening measures of surface layer of subgrade that use the asphalt concrete which have high strength and good water preventing ability combined with graded broken stone is put forward. （3） The calculating analysis method on the structure intensity and deformation suitable for heavy haul railway subgrade under large axle load has guiding significance to the improvement of design and technical standard of heavy haul railway subgrade of our country.

关 键 词：重载铁路 大轴重 基床结构 强度和变形控制 强化措施 

分 类 号：U213.1[交通运输工程—道路与铁道工程]