高速铁路桩板结构路基设计有关问题研究

桩板结构由钢筋混凝土桩基、路基填土与钢筋混凝土承载板组成，是融路基结构和地基处理为一体的新型路基结构形式。根据桩板结构的荷载特征和受力特性分析，对其埋置深度、承载板长度以及结构型式进行了研究，对高速铁路桩板结构路基的选型提出了建议；通过列车竖向活载的动力作用分析，对非埋式、浅埋式桩板结构中列车竖向活载的动力系数，以及桩板结构路基沉降的计算方法及差异沉降限值等进行了探讨。

Research on Design of Pile-plank Subgrade for High Speed Railway

Pile-plank structure, which is made up of reinforced concrete pile foundation, subgrade fill and reinforced concrete bearing plank, is a new type of subgrade structure combining with foundation treatment. According to the characteristic analysis of load and stress on such pile-plank structure, the paper studied the buried depth and the length and structure of bearing plank, and gave suggestion about the selection of pile-plank structure for high speed railway; then through the dynamic interaction analysis on the vertical live load of train, discussed the dynamic coefficient calculation of the vertical live load on such structure not buried and shallowly buried, and the settlement calculation and differential settlement limit thereof.