Abstract：Research purposes:Pile－slab Structure is a new form of foundation structure under track．At present，there is no corresponding design code at home and abroad．The theoretical research seriously lags behind engineering practice．Based on elastic theories and reasonable assumptions，the differential equations of slab ＇s stress and deformation are established so as to deduce the analytical solution to the mid － span slab of pile － slab structure with fixed ends．
Research conclusions:This analytic calculation method is simple，clear and easy for engineering designers to master．Moreover，the calculation parameters are commonly used in engineering design and easy to gain with the universality of application．With the analytic method presented in this paper，not only can the flexure deformation and load bearing situation of the mid － span slab be found，but also can the load on the pile top be known．The calculation result can reflect the common mechanical regulation of the load sharing and transferring of the pile － slab．Furthermore，it can provide theoretical guidances for theory studies and engineering designs of pile － slab structure．
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Zhan Yongxiang，Jiang Guanglu．Theoretical Exploration on Design of Pile － plate Structure Subgrade in Steep Slope Section of High Side Slope on Wuchang － Guangzhou Railway Passenger Dedicated Line ［J］． Journal of Railway Engineering Society，2007(S1) : 94－96．
Li Shaowen．Comprehensive Construction Technology of Embankment in the Ballastless Track Test Section for Sui － Yu Railway ［J］．Railway Construction Technology，2007(1) : 6－9．
［10］ 肖宏，郭丽娜．桩板结构技术应用研究［J］．铁道标准设计，2010(2) :47－50．
Xiao Hong，Guo Lina．Study on the Application of Pile － slab StructureTechnology［J］．Railway Standard Design，2010(2) :47－50．
2011, Vol. 28 
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