After grouting the longitudinal joints of the pavement, it is difficult for rainwater to infiltrate through the surface of the road, and the excess rainwater that is difficult to be discharged from the pavement will also flow to the slope, so that the volumetric water content at the longitudinal joints is almost insignificantly changed with the amount of rainfall, and only small changes occur between the contact surfaces of the structural layers.
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The mechanism of seepage prevention of polymer grouting repair for longitudinal cracks in reconstructed and expanded pavement.
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From Fig 22 , it can be seen that with the increase of rainfall time, the longitudinal joint pavement repaired by grouting first appeared on the surface of the slope with a small transient saturated zone, the transient saturated zone under the action of continuous rainfall slowly became larger, and along the slope showed a trend of gradual decrease in the area from the bottom to the top.