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This document discusses the evaluation of swelling properties of shales for underground structure design. It summarizes long-term swell test results on shales from various geological formations. The amount and rate of swelling are governed by calcite content and salt concentration gradients in pore water. Three methods are used to test swelling potential and suppression pressure: free swell tests, semi-confined swell tests, and null swell tests. Swelling is caused by dilution of pore water salt concentratio

Author

Sen Hu

Language

EN