铁道建筑技术
鐵道建築技術
철도건축기술
RAILWAY CONSTRUCTION TECHNOLOGY
2015年
6期
27-31
,共5页
软土地基%大悬臂梁%梁体防裂%技术研究
軟土地基%大懸臂樑%樑體防裂%技術研究
연토지기%대현비량%량체방렬%기술연구
soft soil foundation%large cantilever girder%crack prevention of beam%technology study
青洋大桥为脊背大悬臂梁，为解决在软土地基上现浇大跨度箱梁产生不均匀沉降使梁体开裂问题，对其防裂施工技术进行了研究。通过采取“控”与“拱”相结合的预防措施，以及地基加固、支架变形的控制方法、支架预拱度的计算设置等一系列措施，成功预防了该桥梁体因软基下沉而可能出现的裂缝。
青洋大橋為脊揹大懸臂樑，為解決在軟土地基上現澆大跨度箱樑產生不均勻沉降使樑體開裂問題，對其防裂施工技術進行瞭研究。通過採取“控”與“拱”相結閤的預防措施，以及地基加固、支架變形的控製方法、支架預拱度的計算設置等一繫列措施，成功預防瞭該橋樑體因軟基下沉而可能齣現的裂縫。
청양대교위척배대현비량，위해결재연토지기상현요대과도상량산생불균균침강사량체개렬문제，대기방렬시공기술진행료연구。통과채취“공”여“공”상결합적예방조시，이급지기가고、지가변형적공제방법、지가예공도적계산설치등일계렬조시，성공예방료해교량체인연기하침이가능출현적렬봉。
Qingyang Bridge is a rib structure large cantilever bridge.In order to solve the crack of large span box girder cast-in-place on uneven settlement,crack prevention construction technology is studied in this paper.The preventive meas-ures of “control”combined with “arch”,strengthening foundation,method of the support deformation control,calculating and setting camber are taken.The possible crack of girder caused by soft foundation settlement is prevented successfully.
