Abstract：Research purposes: The stability of the high-rise pier is always a critical factor for the safe of bridge. How to increase the stability of the high-rise pier, and at the same time make the appearance aesthetic and the force reasonable，is always a question for the engineers explored. The paper analyses the spacial stability for the double-shaft and thin-wall high-rise pier bridge of the Jing-Cheng-San-Qi Qingshuihe 2#, with the three-dimensional finite element analysis software SAP2000，comparisons for the stability of the non-collar beam between the double-shaft of the high-rise pier and the added-collar beams for the longest cantilever construction and the final completion are analyzed.
Research conclusions: The influence of the stability by the collar beam for the double-shaft and thin-wall high-rise pier is preliminarily given; the collar-beam is making a larger contribution to the straight forward stability for the bridge, and has little effect for the lateral stability; increasing the collar-beam between the thin-wall piers , the contribution for the stability comes to the stabilization. The collar-beam between the thin-wall piers is effectively increasing the stability for the double-shaft and thin-wall high-rise pier bridge, but after a certain extent, increasing the numbers of the collar-beam is not apparent.
李健刚，杜玉东，魏燕玲，张俊波. 横系梁对双肢薄壁高墩刚构桥稳定性的影响分析[J]. 铁道工程学报, 2008, 25(11): 31-34.
LI Jian-gang,Du Yu-dong, Wei Yan-ling, ZHANG Jun-bo. Influence Analysis of the Stability by the Collar Beam of Double-shaft and Thin-wall High-rise Pier Rigid Frame Bride. 铁道工程学报, 2008, 25(11): 31-34.
2008, Vol. 25 
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