研究结论：桥路过渡段路基基床表层动应力的最大值位于过渡段正梯形底部折角处，均值约 12.73 kPa;桥路过渡段路基基床表层采用级配碎石加强后，动应力在垂向衰减较快，至基床底层底面时，衰减率达 90%;列车速度由200 km/h 增加到 250 km/h 时，路基基床表面动应力增加约 20%; 车速由 250 km/h 增加到350 km /h时，过渡段路基基床表面的动应力增加约 10% 。
Abstract：Research purposes:The smooth and safety operation of high － speed train need the subgrade to provide the sub － rail supporting system with the small settlement，high stiffness and stable dynamic characteristics． For the Wuhan －Guangzhou high － speed railway，the bridge － subgrade transition section was designed to realize the smooth transition of stiffness and settlement between the bridge and subgrade． The test cells were placed in test transition section during the construction to test the spatial distribution characteristics of the dynamic stress when the CRH2 EMU run in the transition section．
Research conclusions:The maximum dynamic stress of bridge － subgrade transition section appeared in the turn corner of the trapezoidal bottom of the transition section with the average value of 12.73 kPa．After the surface of the foundation bed of the transition section was reinforced by the graded broken stone，the dynamic stress of transition section in the vertical reduced quickly and the attenuation rate was up to 90% on the bottom of the subgrade bed．The dynamic stress of the bed surface in the transition section increased by about 20% when the train speed increased from 200 km /h to 250 km /h，and the dynamic stress of the bed surface increased by about 10% when the train speed increased from 250 km /h to 350 km /h．
徐红星. 高速铁路桥路过渡段动应力测试与分析[J]. 铁道工程学报, 2012, 29(8): 1-5.
XU Hong － xing. Test and Analysis of Dynamic Stress of Bridge － subgrade Transition Section of High － speed Railway. 铁道工程学报, 2012, 29(8): 1-5.
The Fourth Survey and Design Institute of China Railways． General Design Rules of Wuhan － Guangzhou Passenger Dedicated Line ［R］．Wuhan: The Fourth Survey and Design Institute of China Railways，2005．
［2］ Sunaga，Makoto． Vibration Behavior of Roadbed on Soft Ground Trainload ［J］．Quarterly Report of RTRI， 1990 (31) : 29－35．
Chen Xuehua，Lv Wentian，Wang Yonghe． Dynamic Responses Characteristic of Transition Section in High Speed Railway［J］． Journal of Vibration and Shock， 2006 (3) : 95－98．
Li Xianmin，Wang Yonghe，Yang Guolin，etc． Study on the Dynamic Response of Transition Section Roadbed Subject to High Speed ［J］． Chinese Journal of Geotechnical Engineering，2004 (1) : 100－104．
Sun Changxin，Liang Bo，Yang Quan． Test and Analysis for the Dynamic Stress Responses of the Qin － Shen Railway＇ s Subgrade［J］． Journal of Lanzhou Railway University，2003(4) : 110－112．
China Railway Siyuan Survey and Design Group Co． Ltd． General Rreport of Experimental Research on System Construction Technology of Improved Weathered Soft Rock on Wuhan － Guangzhou High － speed Rail ［R］．Wuhan: China Railway Siyuan Survey and Design Group Co．Ltd，2009．
China Railway Siyuan Survey and Design Group Co． Ltd． General Report of Experimental Research on Deformation Control and Construction Technology of Transition Section under Ballastless Track ［R］． Wuhan: China Railway Siyuan Survey and Design Group Co．Ltd，2009．
Wu Qiang． In － situ Test and Analysis of Dynamic Responses of Red Clay Cutting Bedding of Wuhan— Guangzhou Passenger Dedicated Line［J］． Journal of Railway Engineering Society，2011(8) : 47－52．
2012, Vol. 29 
版权所有 © 2014 《铁道工程学报》编辑部