Impact Analysis of Railway Subgrade Passing Under Adjacent Bridge on Its Pile Foundation
In recent years,the road and railway transportation network has become more and more dense in our courtry,and more and more railways passing under existing highway bridges construction projects need building or expanding.Based on Yumo Railway under Kunmo Expressway Mengla No.6 bridge,LM cross railway bridge project,the different stages of railway subgrade underpass construc-tion and operation by the finite element software were simulated,and the influence on pile foundation of adjacent bridge deeply was an-alyzed.It was concluded that the railway subgrade underpass construction and operation will produce additional displacement and set-tlement to adjacent pile foundation,and the horizontal displacement(along the bridge direction)and settlement value generated by pile foundation closer to the railway roadbed were larger than other pile foundations in this project,they were 0.12 mm and 3.0 mm respec-tively.At the same time,the measures of investigation,monitoring,protection and construction control before,during and after construc-tion were put forward.
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