Analysis on Construction Safety Impact of Slurry Balance Pipe Jacking underpassing Operating Railway
Combined with the project of slurry balance pipe jacking in the long distance heat supply pipeline network project from a Power Plant to Hohhot City,the deformation of subgrade and bridge of Beijing-Baotou High-speed Railway,Beijing-Baotou Railway and Huhehaite-Wangqi Tie-line Railway were simulated and analyzed by numerical simulation method.The influence of slurry balance casing underpassing construction on railway subgrade and bridge was revealed.The results show that,after the reinforcement of temporary beam and pipe shed for passenger-dedicated line,the reinforcement of common-speed line roadbed by pipe shed and the protection of bridge foundation by grouting,the deformation values of existing railway subgrade and bridge can meet the safety requirements of railway operation.According to three different grades of railway,the three strengthening design schemes proposed are effective and feasible.
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