A field condition-based test method for artificially frozen soils Available to Purchase

The formation process of artificially frozen soils in the field, which significantly affects the behaviour of frozen walls, can be divided into three stages – that is, K₀ drained consolidation (K₀DC), drained freezing under applied stress (F) and the formation of lateral thermal gradient (G). The K₀DCGF method was thus developed and its reliability was comprehensively evaluated by testing on hollow cylindrical specimens. It was found that the measured K₀ at the inner and outer surfaces of the hollow cylindrical specimens was identical to that of the cylindrical specimens. Unlike the widely observed frost heave during freezing prior to stress application, drained freezing under applied stress resulted in a slight shrinkage of the specimen's volume. The weakening of the lateral thermal gradient on the K₀DCGF-based strength was smaller than that observed in previous studies of frozen soil specimens with a vertical thermal gradient due to the parallel structures of the frozen zones with different temperatures in the frozen hollow cylinder. The proposed K₀DCGF method was validated using multiple tests and can be used for assessing the strength behaviour and associated mechanism of various artificially frozen soils.