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

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.
Owner:ZHEJIANG UNIV
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