客运专线无砟轨道桩-板结构路基

Study on Pile-slab Structure Subgrade for Ballastless Track of Passenger Dedicated Line

研究目的:为实现无砟轨道铁路严格的路基工后沉降控制,遂渝线无砟轨道综合试验段首次采用了桩-板结构路基方案,其工作机理、承载及动力特性需要研究。研究结论:桩-板结构路基是无砟轨道铁路一种新的路基结构形式,其承载特性和动力性能良好,且具有较好的经济性,适用于新建客运专线无砟轨道铁路中的工程地质条件复杂的低路堤和路堑地段以及两桥(隧)之间短路基、道岔区路基等特殊地段软弱地基加固,同时也可用于已建路堤的补强加固。

Research purposes： In order to realize the rigid control of settlement after construction of subgrade for ballastless track railway, the proposal of pile - slab structure subgrade is for the first time adopted in the ballastless track integrated pilot section of Suining - Chongqing railway, so the study must be carried out on its working mechanism, bearing capacity and dynamic characteristics. Research conclusions： The pile - slab structure subgrade is a new type of subgrade structure of ballastless track railway with high bearing capacity, dynamic performance and better economical efficiency. So it can be applied to the soft foundation improvement in the low embankment and cutting section where the engineering geology is complicated and in the special section where the short subgrade is between two bridges （tunnels） and subgrade in the switch section of newly - built ballastless track railway of passenger dedicated line, simultaneously to the reinforcement and stabilization of the built embankment.