The use of vertical drains in the field demands sophisticated laboratory consolidation testing under various drainage conditions. In this study, a multi-directional flow consolidometer was developed for the constant rate of strain (CRS) consolidation test. This device provides variability in controlling the drainage direction (e.g., vertical, radially inward, radially outward) during K0 consolidation. For each drainage condition, relevant theories for interpreting the CRS testing data have been derived. Reconstituted kaolinite specimens were consolidated at a constant rate of 2.9%/h using the developed device with various drainage directions. The results showed consistent compression behavior, and the anisotropic coefficient of consolidation confirmed the applicability of the device in experiments involving in situ consolidation.
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