Experimental Study on the Moisture Migration Law of Soils under Dynamic Slaking Conditions[J]. Chinese Journal of Geotechnical Engineering. DOI: 10.11779/CJGE20241053
Citation:
Experimental Study on the Moisture Migration Law of Soils under Dynamic Slaking Conditions[J]. Chinese Journal of Geotechnical Engineering. DOI: 10.11779/CJGE20241053
Experimental Study on the Moisture Migration Law of Soils under Dynamic Slaking Conditions[J]. Chinese Journal of Geotechnical Engineering. DOI: 10.11779/CJGE20241053
Citation:
Experimental Study on the Moisture Migration Law of Soils under Dynamic Slaking Conditions[J]. Chinese Journal of Geotechnical Engineering. DOI: 10.11779/CJGE20241053
Revealing the moisture migration law of subgrade soils under dynamic wetting conditions is crucial for analyzing the causes of mud pumping in heavy-haul railways. This study developed a hydraulic combined testing system to conduct triaxial tests on subgrade soils under dynamic wetting. The research found that resistivity initially decreases, then increases, and finally stabilizes, and proposed a method for calculating moisture content, verifying the applicability of the hydraulic combined testing system in dynamic wetting tests. The influence of dynamic stress on moisture migration was analyzed, showing that the moisture migration rate increases with higher dynamic stress, while moisture content decreases. The study also revealed the impact of dry density on moisture migration. With increased dynamic load and sample dry density, the initial moisture content increase rate also rises. The coupling effect of dry density and vibration load significantly affects early moisture distribution, creating a suction phenomenon in smaller pores that accelerates upward moisture migration.