High polymer grouting repair method for treating ballastless track foundation bed mud pumping

Abstract

The invention discloses a high polymer grouting repair method for treating ballastless track foundation bed mud pumping, which is characterized in that residual accumulated water and mud in a foundation bed surface layer in a mud pumping disease area are squeezed and discharged in a high-pressure grouting manner, and pores in the foundation bed surface layer and a void area at the bottom of a base plate are fully filled, so that the stress condition of the foundation bed surface layer is improved; the whip effect of the track structure under the train operation load effect is relieved; and meanwhile, grouting is conducted on the junction of the side edge of the base plate and the concrete sealing layer, and rainwater is prevented from intruding into the channel. And after high polymer grouting is completed, sealing glue is adopted for sealing expansion joints in the ends of the base plates and cracks in the side edges of the base plates correspondingly, and rainwater is further prevented from invading the channel. According to the method, the supporting rigidity of the surface layer of the foundation bed in the disease area is enhanced, the stress characteristic of the track structure is improved, a rainwater invasion channel is effectively blocked finally, the long-term service performance of the repaired foundation bed is guaranteed, and the frost boiling and mud emitting diseases of the ballastless track foundation bed of the high-speed railway can be well treated.

Description

technical field [0001] The invention relates to the technical field of geotechnical engineering, in particular to a high-polymer grouting repair method for treating the mud and mud of the ballastless track foundation bed, which is suitable for the repair of the mud and mud disease of the ballastless track railway bed of the high-speed railway. Background technique [0002] The muddying of railway foundation bed is a common subgrade disease of high-speed railway in my country. It occurs in both ballasted and ballastless tracks. It is a chronic disease of railway subgrade for many years. As for the ballasted track, as an early track structure, the related research on the muddying disease of the ballasted track is relatively comprehensive. It is difficult to apply the related theory of orbit directly to ballastless orbit. As a new type of track structure, the ballastless track subgrade structure has high requirements on the material properties, compaction degree and fine parti...

AI Technical Summary

Problems solved by technology

Shallow low-pressure grouting is mostly used in the treatment of existing ballastless track subgrade bed slopping. In this method, the diffusion radius of the slurry material is limited, and the residual retained water and mud inside the surface of the subgrade bed cannot be fully squeezed out. The hollow area at the bottom of the slab was not fully filled, especially after the grouting repair was completed, the rainwater intrusion channel was not blocked, so that the rainwater could still intrude into the surface of the foundation bed, and the repaired foundation bed appeared secondary mud in more than a month, and the long-term The service performance is not good, so it can be seen that the plugging measures of shallow grouting repair failed to effectively prevent the expansion of mud and mud

Therefore, the conventional grouting repair method is difficult to cure the muddying disease, and it is necessary to further explore a more optimized polymer grouting method to control the muddying disease of the ballastless track subgrade

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