Abstract
In order to understand the mechanical behavior of soft rock, many laboratory tests on sedimentary soft rock have been conducted in which the influence of the intermediate principal stress was not taken into account. However, in predicting the precise behavior of soft rock, the influence of intermediate principal stress always plays an important role. Therefore, in this study, a series of plane-strain compression tests on sedimentary soft rock were carried out. Fully saturated specimens were used for all tests. The plane-strain apparatus used in this research has a special feature in which the pore water pressure in the specimen can be measured. From the laboratory tests on soft rock, it was found that the pore water pressure distribution in the specimen was not uniform. In this research, the plane-strain compression tests were regarded as non-homogeneous model tests and the behavior of the local pore water pressure in the specimen was investigated.
Published Version
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