Swelling and softening behaviour of La Biche shale

Canadian Geotechnical Journal - Tập 35 Số 2 - Trang 206-221 - 1998
R. V. C. Wong

Tóm tắt

Free swell, semiconfined swell, and one-dimensional oedometer swell tests were performed on La Biche shale specimens in solutions of different salinities. The swelling behaviour of La Biche shale was found to be highly anisotropic and dependent on electrolyte concentration, stress, and swelling history. Drained triaxial compression tests were conducted on La Biche shale specimens subjected to different degrees of swelling. The test results indicate that the Young's modulus decreases with increasing swelling. The strength loss due to swelling can be explained by the Hvorslev failure theory. A descending power law is proposed to describe the cohesion reduction with the swelling.Key words: shale, salinity, swelling, strength weakening, modulus softening.

Từ khóa


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Thông tin
Thông tin xuất bản

Canadian Geotechnical Journal

Tập 35 Số 2

206-221

Thông tin tác giả