铁道建筑技术
鐵道建築技術
철도건축기술
RAILWAY CONSTRUCTION TECHNOLOGY
2014年
11期
12-15
,共4页
钢管混凝土%拱圈%支架拆除%变形%应力%仿真分析
鋼管混凝土%拱圈%支架拆除%變形%應力%倣真分析
강관혼응토%공권%지가탁제%변형%응력%방진분석
concrete-filled steel tube%arch ring%scaffold removing%deformation%stress%simulation analysis
结合天津南港铁路工程有砟轨道双线96 m 钢管混凝土系杆拱桥，利用 Midas Civil 建立模型，通过对4种拱圈对称落架方案的对比分析，得出在拱圈落架过程中控制截面的变形值和应力值最小的方案，提出了从1／4拱肋附近逐次对称向拱脚与拱顶均衡卸落的落架方案对拱圈变形和受力更为有利，并在施工过程中取得了较好的效果。并且考虑到现场施工场地、环境以及施工技术条件限制等因素的影响，提出了3种拱圈不对称落架施工方案，为施工过程中的监测与施工安全性控制提供理论参考依据。
結閤天津南港鐵路工程有砟軌道雙線96 m 鋼管混凝土繫桿拱橋，利用 Midas Civil 建立模型，通過對4種拱圈對稱落架方案的對比分析，得齣在拱圈落架過程中控製截麵的變形值和應力值最小的方案，提齣瞭從1／4拱肋附近逐次對稱嚮拱腳與拱頂均衡卸落的落架方案對拱圈變形和受力更為有利，併在施工過程中取得瞭較好的效果。併且攷慮到現場施工場地、環境以及施工技術條件限製等因素的影響，提齣瞭3種拱圈不對稱落架施工方案，為施工過程中的鑑測與施工安全性控製提供理論參攷依據。
결합천진남항철로공정유사궤도쌍선96 m 강관혼응토계간공교，이용 Midas Civil 건립모형，통과대4충공권대칭락가방안적대비분석，득출재공권락가과정중공제절면적변형치화응력치최소적방안，제출료종1／4공륵부근축차대칭향공각여공정균형사락적락가방안대공권변형화수력경위유리，병재시공과정중취득료교호적효과。병차고필도현장시공장지、배경이급시공기술조건한제등인소적영향，제출료3충공권불대칭락가시공방안，위시공과정중적감측여시공안전성공제제공이론삼고의거。
Combined with the double ballast track 96 m concrete-filled steel pipe arch bridge in Tianjin Nangang Railway engineering,a model is established with the Midas Civil.Through comparative analysis of four kinds of arch ring landing structure schemes,scheme with minimum control cross section deformation and stress values in the process of arch ring landing is found out.It is concluded that scheme of successive symmetric landing from a quarter of the arch rib to the arch foot and vault is more favorable to arch ring deformation and stress distribution,and good results have been achieved in the construction process.And considering factors such as construction plant,environment,construction technology and condi-tion,the author puts forward three arch ring asymmetry landing structure construction schemes to provide theoretical refer-ence for monitoring in the process of construction and construction safety control.
