Research on Microstructure of Soft Clay under Various Artificial Ground Freezing Conditions Based on NMR

Nuclear magnetic resonance (NMR) can help to collect soft clay pore size data. This paper uses NMR study the effect of freezing duration, gap time between two actions and thawing temperature on distribution (PSD) in clay. It was found that most progress completed during first hours. A longer second cycles leads greater structural damage. An appropriate results less subsidence induced by artificial ground (AGF). new method distinguish water types for various conditions is proposed. determine cutoff value could fill defect previous methods.