Analysis of the Influence of Bridge Jacking Construction on the Displacement of the Existing High-speed Railway Pier and the Settlement Prediction
With the wide application of bridge jacking construction in the construction of new lines crossing existing lines,the research on the influence of bridge jacking construction on the pier displacement of existing high-speed railway is in urgent need of develop-ment.In order to study the influence of the whole process of bridge jacking construction on adjacent existing high-speed railway pier displacement,based on the ZJTLSG-1standard cross Beijing to Shanghai high-speed railway bridge project of Zhengji Railway,the influence of key construction conditions of jacking construction on adjacent existing high-speed railway pier displacement and settle-ment was studied based on monitoring data.Then,the advanced BP neural network technology is used to predict the settlement of adja-cent high-speed railway.The results show that:(1)the existing high-speed rail pier settlement occurs after the construction of the whole process of jacking and the horizontal movement direction of the existing high-speed rail pier is opposite to the jacking direc-tion;(2)The horizontal and vertical displacements of the existing piers decrease from the near to the far side of construction;(3)BP neural network is used to predict the settlement of the existing pier.The predicted value is basically consistent with the measured val-ue,and the prediction is more accurate.
NETL
NSTL
万方数据
维普
