Fundamentals of desiccation cracking of fine-grained soils: experimental characterisation and mechanisms identification

DOI Web Site Web Site 被引用文献6件
  • H. Peron
    Ecole Polytechnique Fédérale de Lausanne (EPFL), Laboratory of Soil Mechanics (LMS), Station 18, CH-1015 Lausanne, Switzerland.
  • T. Hueckel
    Ecole Polytechnique Fédérale de Lausanne (EPFL), Laboratory of Soil Mechanics (LMS), Station 18, CH-1015 Lausanne, Switzerland.
  • L. Laloui
    Ecole Polytechnique Fédérale de Lausanne (EPFL), Laboratory of Soil Mechanics (LMS), Station 18, CH-1015 Lausanne, Switzerland.
  • L. B. Hu
    Ecole Polytechnique Fédérale de Lausanne (EPFL), Laboratory of Soil Mechanics (LMS), Station 18, CH-1015 Lausanne, Switzerland.

書誌事項

公開日
2009-10
権利情報
  • http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining
DOI
  • 10.1139/t09-054
公開者
Canadian Science Publishing

この論文をさがす

説明

<jats:p>This paper presents the results of a comprehensive experimental study of the desiccation of fine-grained soils. Air drying of initially saturated soil slabs in controlled conditions is investigated by performing three kinds of tests: free desiccation tests, constrained desiccation tests (prevented shrinkage), and crack pattern tests. Strains, suction, water content, and crack geometry are investigated. Results reveal that unconstrained drying exhibits two stages: a domain with large, mostly irrecoverable deformations and degree of saturation close to 100%, followed by a domain with lower deformations at a decreasing degree of saturation. Homogeneous soil macroscopic cracking is possible only in the presence of boundary constraints and (or) moisture gradients, inducing the build-up of tensile stresses. Results also show that, for the initially saturated remoulded soils tested here, in the whole sample and near a crack initiation point, the degree of saturation remains very close to 100% until cracking, while cracking onset, the air-entry suction, and the shrinkage limit are close to each other. Cavitation nuclei and the formation of an irregular drying front at cracking initiation are commented upon in light of this observation. Finally, results suggest that the crack pattern geometry is the result of energy redistribution. A quantification of the process is proposed.</jats:p>

収録刊行物

被引用文献 (6)*注記

もっと見る

詳細情報 詳細情報について

問題の指摘

ページトップへ