Correction method and correction structure for ballastless track subgrade of high-speed railway in soft soil region

摘要

A correction method and a correction structure for a ballastless track subgrade of a high-speed railway in a soft soil region. The method comprises: step 1: when lateral displacement of a high-speed railway subgrade (3) occurs, providing a deformation groove (8) and multiple stress relief holes (10) in an asymmetrical load area (5) on the top of a first soft stratum area (4), filling the deformation groove (8) with rigid foam (9), and filling up the stress relief holes (10) with medium-coarse sand or rubbles; step 2: providing a rotary jet grouting pile (7) in a second soft stratum area (6), and driving a pile foundation reinforcement area (1) located at the bottom of the high-speed railway subgrade (3) to displace from the second soft stratum area (6) to the first soft stratum area (4) by using an instantaneous injection pressure generated by the construction of the rotary jet grouting pile (7), and driving, by the pile foundation reinforcement area (1), a subgrade reinforcement bed course (2) located above the pile foundation reinforcement area as well as the high-speed railway subgrade (3) to simultaneously move, thereby correcting the subgrade; and steps 3: densely filling the deformation groove (8) with a solidifying material. The method does not interrupt the operation of a railway and does not damage the structure of a track,. and facilitates construction.To be published with Fig 1