广深准高速铁路有部分区段利用既有路基，根据技术要求,需加固补强。广深铁路运输十 分繁忙，要在确保正常行车条件下进行基床加固,技术难度很大,如果限速运行或封锁线路，又会 造成巨大的经济损失。本文系统全面地论述了为解决这些问题进行的试验研究和应用效果。

According to the technical demands, some sections of the existing road bed in Guang-shen quasi-high-speed railway should be consolidated and reinforced. Guang-shen rail?way is very busy. So it is difficult in technique to reinforce the road bed under the regular driving. If limiting speed or closing the railway，it must cause a great economic loss. This re?port expounds the experimental study all-sidedly on how to solve these problems and its ap?plication effect.