铁道建筑
鐵道建築
철도건축
RAILWAY ENGINEERING
2014年
5期
120-123
,共4页
高速铁路%桥上%无砟轨道%无缝道岔
高速鐵路%橋上%無砟軌道%無縫道岔
고속철로%교상%무사궤도%무봉도차
High-speed line%Bridge bearing%Ballastless track%Continuous welded turnout
介绍了京沪高速铁路徐沪段桥上板式无砟无缝道岔的结构组成和结构特点，建立了桥上纵连底座板式无砟无缝道岔的“岔-板-板-梁-墩”一体化计算模型和计算方法，基于开裂后钢筋混凝土刚度折减理念和轴向拉压杆件理论采用极限状态法进行底座板结构设计，提出了京沪高速铁路道岔梁结构设计方法，确定道岔梁的合理结构形式、设计参数、纵横向支座合理布置方式。
介紹瞭京滬高速鐵路徐滬段橋上闆式無砟無縫道岔的結構組成和結構特點，建立瞭橋上縱連底座闆式無砟無縫道岔的“岔-闆-闆-樑-墩”一體化計算模型和計算方法，基于開裂後鋼觔混凝土剛度摺減理唸和軸嚮拉壓桿件理論採用極限狀態法進行底座闆結構設計，提齣瞭京滬高速鐵路道岔樑結構設計方法，確定道岔樑的閤理結構形式、設計參數、縱橫嚮支座閤理佈置方式。
개소료경호고속철로서호단교상판식무사무봉도차적결구조성화결구특점，건립료교상종련저좌판식무사무봉도차적“차-판-판-량-돈”일체화계산모형화계산방법，기우개렬후강근혼응토강도절감이념화축향랍압간건이론채용겁한상태법진행저좌판결구설계，제출료경호고속철로도차량결구설계방법，학정도차량적합리결구형식、설계삼수、종횡향지좌합리포치방식。
The paper outlines the structures and the main features of the slab-type ballastless continuous welded turnouts on the bridges of Xuzhou-Shanghai section on Beijing-Shanghai high speed line. And it proposes a integrated calculation mode of“turnout-turnout slab-bottom plate-girder-pier”,specifically for the longitudinally-connected-bottom-pad-type ballastless continuous welded turnouts,in which the limit states are considered as the breakthrough in the designing of the bottom plate. The paper takes reference from the stiffness reduction concept for reinforced concrete after it cracks and the axial force theory,be it pulling or pushing. Then,the paper concludes the designing scheme of the turnout-girder structure for Beijing-Shanghai high speed line and elaborates the structure,designing parameters,and the arrangement of the vertical and horizontal support bearings.
