铁道标准设计2019，Vol.63Issue(1)：76-81,6.DOI:10.13238/j.issn.1004-2954.201802090002
临近既有线钢桁梁高空横移施工临时支墩安全性分析
Safety Analysis on Temporary Piers during Lateral Pushing Construction at High Attitude of Steel Truss Girder Approaching on Existing Railway Line
摘要
Abstract
In order to study the safety of the temporary pier during the lateral pushing construction process of steel truss girder at a high altitude, the whole construction process is simulated and analyzed, based on the integral finite element model of temporary piers. The model is verified by field test results and the influence of friction coefficient and pile length on the safety of the temporary pier under construction is analyzed based on the verified model. The results show that the settlement of temporary pier, the horizontal displacement at the top of the pier and the strain at the top of the pile are well matched with the measurements. The friction coefficient within the specified range has little effect on the settlement of the temporary pier and the top stress of the pile, while the effect on horizontal displacement at the top of the pier is more significant, and the relationship between the friction coefficient and the horizontal displacement at the top of the pier is basically proportional. The variation of the pile length has little effect on the horizontaldisplacement at the top of the pier. With the increase of the pile length, the settlement of the temporary pier and the strain at the bottom decrease obviously.关键词
铁路桥/钢桁梁/顶推架设法/临时支墩/数值模拟/现场实测Key words
Railway bridges/Steel truss girder/Erection by incremental launching method/Temporary pier/Numerical simulation/Field test分类
交通工程引用本文复制引用
沈惠军,王浩,荀智翔,王飞球,朱克宏..临近既有线钢桁梁高空横移施工临时支墩安全性分析[J].铁道标准设计,2019,63(1):76-81,6.基金项目
国家"973计划"青年科学家专题项目(2015CB060000) （2015CB060000）
中国铁路总公司科技研究开发计划重点课题(2017G002-K) （2017G002-K）
