Abstract：Research purposes：By comparison of allowable stress method and limit state method adopted in the design of pile-slab structure for new foundation improvement, the analysis has been made on the feature, merit and current development condition of two design methods and the calculation and quantitative analysis has been made according to engineering cases to attain some useful conclusions for designers for reference.
Research conclusions : If the allowable stress method is used , it is not necessary to differentiate the kinds and condition of service of the members. According to allowable strength, the different load types have the same safety coefficient K to make the structure design safer and more conservative. Probability limit state method based on probability statistics has objectivity and reasonableness, superior to allowable stress method with subjectivity and experience. However for the particularity of railway train load, the reliability of probability limit state method is not mature. Thereby at present the allowable stress method shall be adopted in the design of pile-slab structure. It is hoped that in the near future probability limit state method will take the place of allowable stress method.
罗照新,丁兆锋. 客运专线桩板结构设计方法的探讨[J]. 铁道工程学报, 2008, 25(8): 33-36.
LUO Zhao-xin，DING Zhao-feng. Discussion on the Design Method of Pile-slab Structure for Passenger Dedicated Railway. 铁道工程学报, 2008, 25(8): 33-36.
2008, Vol. 25 
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