桩土性质对桩板结构无缝道岔的影响分析

研究目的:桩板结构是一种新型的轨下基础结构型式,由于其能有效控制路基沉降的优点,在高速铁路建设中得到了广泛的推广应用。随着桩板结构在高速铁路中越来越多的使用,将不可避免地出现无缝道岔设置在桩板结构上的情形,为考察桩板结构与无缝道岔相互作用力学特性,本文主要应用有限元软件建立了桩板结构无缝道岔模型,进行了不同桩间距、不同板下土体性质以及不同位置桩基沉降的影响因素分析。研究结论:研究结果表明:(1)过大的桩间距对上部无缝道岔的受力非常不利;(2)在不考虑板下土体的支承作用时,下部桩板结构也能为上部无缝道岔结构提供足够的竖向支承刚度;(3)桩的沉降会影响相邻两跨桩板结构上无缝道岔的基本轨挠曲力,但对隔跨上的基本轨挠曲力影响不大。

Study on the Influences of Pile Soil Properties to Welded Turnout in Pile slab Structure

Research purposes: Pile-slab structure as a new-type railway foundation of track undersurface can control its subgrade settlement effectively and has been widely applied in high speed railway construction.It is very likely that welded turnout is lie upon the Pile-slab structure that is increaseing used in high speed railway.To research the interaction between welded turnout and Pile-slab structure,this paper,with building the mode of welded turnout in pile-slab structure,mainly analyze the influence factors...