Abstract：Research purposes: The main bridge of HuTiaomen River Bridge is one of the major projects of the Guangzhou － Zhuhai Railway;Main arch is a new structure of truss － arch with three tubes included parallel two － tubes and basket handle inclination of one － tube． Various influence factors were studied ，including inclination of the arch Ribs ，spatial position of the basket handle one － tube，different types of crossbars and cross － sections of the arch ribs， thus making a optimal design and providing reference to the similar works in future．
Research conclusions:The augmentation of the basket handle inclination of one － tube’s sloping angle is beneficial to improve the stability of the arch bridge ，while the spatial position of one － tube has little effects on it． Besides，the design of K － type crossbar at the impost of arch is very necessary，which greatly improve the stability of whole bridge structure． However ，there is no marked distinction on the structural stability between 米 － type crossbar and K － type crossbar． Increasing the cross － section of arch ribs has little effects on improving their transversal stability．
王鹏宇. 两管平行单管提篮内倾三肢桁架拱稳定性研究[J]. 铁道工程学报, 2012, 29(6): 50-54.
WANG Peng Yu. Stability Study of Truss － arch with Three Tubes included Parallel Two －tubes and Basket Handle Inclination of One － tube. 铁道工程学报, 2012, 29(6): 50-54.
［2］ 潘盛山，张哲，黄才良． 下承式 X 型双肋拱内倾角度对横向稳定性影响研究［J］． 大连理工大学学报，2008(6): 845 － 850．
Pan Shengshan，Zhang Zhe，Huang Cailiang． Research on Lateral Stability Influenced by Inclined Angle of through X － type Double Ribs Arch Bridge ［J］． Journal of Dalian University of Technology，2008(6):845 － 850．
Chen Baochun． State － of － the － art Theory of Calculation for Concrete － filled Steel Tubular Arch Bridge［J］． China Civil Erlgineering Journal，2003(12): 47 － 57．
Li Lingyao，Chen Zhengqing，Gg Yaojun． Efects of Arch Rib Crossbars on Dynamic and Stabilization Characteristics of Concrete Filled Steel Tubular Arch Bridge ［J］． Joumal of Highway and Transportation Research and Developme，2008(3):70 － 74．
Yang Kejian，Li Fengqin，Zhang Yali． Research on the Design of Large Span Deck Steel Tube Concrete Arch Bridge［J］． Journal of Railway Engineering Society ，2008(12):66 － 71．
Wei Jiangang，Wang Jiapo，Chen Baochun． Analysis of Rigidity in Design for CFST Dumbbell － rib Arch Bridges［J］． Journal of Fuzhou University ( Natural Science)，2007(4):582 － 587．
Chen Huai，Sun Yingtao． Variational Sloping Angle of Arch Rib Influenced on the Stability of Double X － shaped Arch Bridge［J］． Journal of Railway Science and Engineering，2009(1):21 － 24．
2012, Vol. 29 
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