Use with caution in collapsible clay soil layers.
b.浆注压力 should not be excessive; it should be sufficient to split, compact, and infiltrate the soil layers (generally controlled within 1.5 MPa). Excessive pressure can lead to the uplifting of the overlying soil layers and the upward migration of the slurry.
c. Prior to solidification, the slurry acts as an additional external load, and grouting disrupts the original bearing layer, thus increasing the likelihood of additional settlement. For sensitive structures, it is recommended to use a staggered grouting method with one or more holes skipped, with an interval of 3 days or more.
d. For cobblestone layers or soil with high dynamic water pressure, liquid should be mixed with a rapid-set accelerator, or use intermittent grouting.