Taigang Bridge in the right line of Daxi passenger dedicated line cross Shitai uplink in 5 ～ 9# mounds by frame pier.The angle between the right line of Daxi passenger dedicated line and Shitai uplink is about 10°.In the east of Shitai uplink is Shitai passenger dedicated line,in the east of Shitai uplink is Ⅲ pulled wire of TaiYuan North Railway Station,so,the span of frame pier is only 16m.The dispersion between Daxi passenger dedicated line and Shitai uplink is very small,in order to ensure clearance requirements,the bridge span of the right line of Daxi passenger dedicated line must be 12m and 16m.The construction conditions are very difficult.This paper introduces the key technologies of the support design,erection and demolition.%大西客专右线太钢特大桥于5～9#墩以框架墩形式上跨石太上行线,大西右线与石太上行线夹角约10.,因石太线东侧为石太客专,西侧为太原北站Ⅲ场牵出线,框架墩跨度受限仅16m,又因大西客专与石太上行线高差小,为保证限界要求,大西右线桥梁跨度只能采用12m、16m跨度方能满足要求,施工条件异常困难,本文详细介绍了支架设计、搭设、拆除施工关键技术.
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