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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 strict post-construction settlement control of ballastless track railway, the subgrade solution of pile-slab structure is adopted for the first time in the comprehensive test section of ballastless track of Suiyu Railway. The working mechanism, bearing capacity and dynamic characteristics of this subgrade should be studied. Research conclusions: The pile-slab structure subgrade is a new type of subgrade structure of ballastless track railway with good bearing characteristics and dynamic performance and good economy. It is suitable for engineering geology of ballastless track railway in newly-built passenger dedicated railway Low embankment and cutting sections with complicated conditions, short foundation in two bridges (tunnels), weak foundation in special sections such as roadbed in turnout area, and reinforcement and reinforcement of existing embankments.