Abstract
Epoxy grout is an effective underwater grouting material. Permeability performance and cementation mechanism of the epoxy grout have important influences on the effectiveness of the grouting of the underwater media. To investigate the permeation characteristics and cementation performance of the epoxy grout in different underwater media, by carrying out permeation grouting experiments with different underwater media, the variation law of permeation and diffusion distance of grout with different mass ratios in underwater media with time is studied. The microscopic reinforcement characteristics of the interface between epoxy grout and different underwater media were analyzed by SEM, and the cementation mechanism of grout in different underwater media was revealed from the microscopic point of view. The results indicate that the mass ratio of the grout is a crucial factor influencing the permeation depth in underwater media. The permeation depth of the grout first increases and then tends to stabilize, while it increases with the mass ratio of the grout. The grout exhibited the highest filling ratio in the sand and gravel media, with a maximum of 68.88%. The effect of grout reinforcement in sand and gravel media was significantly more pronounced than that in other medias, while the effect of grout-ground-level cementation was the least pronounced in cohesive soil layers. Finally, the reaction mechanism of grout in underwater media is discussed. The research results can provide some reference for the selection of grouting materials and the optimization of proportion in underwater grouting engineering.
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