Title Research on visco-elastic-plastic creep model of artificially frozen soil under high confining pressures
Author Li Dongwei; Fan Juhong; Wang Renhe
Author Affil Li Dongwei, Ministry of Education, Engineering Research Center of Mining Underground Engineering, Huainan, China. Other: Anhui University of Science and Technology, China
Source Cold Regions Science and Technology, 65(2), p.219-225, . Publisher: Elsevier, Amsterdam, Netherlands. ISSN: 0165- 232X
Publication Date Feb. 2011
Notes In English. 24 refs. GeoRef Acc. No: 309494
Index Terms alluvium; construction; creep; excavation; experimentation; frozen ground; high pressure tests; models; permafrost; pressure; rheology; sediments; simulation; soils; soil creep; soil tests; viscoelastic materials; clastic sediments; confining pressure; elastoviscoplastic materials; excavations; experimental studies; finite element analysis; high pressure; numerical models; parabolic yield criterion; triaxial tests; viscoplastic materials
Abstract The triaxial creep experiment of artificially frozen soil in deep alluvium was performed by a self-developed machine of triaxial creep frozen soil. After analyzing the experiment results, applying parabolic yield criterion for improved viscoplasticity in the Nishihara model, a new creep constitutive model was established for describing frozen-soil's creep characteristics under high confining pressures. The secondary development tools and data interface had been used to add the visco-elastic-plastic creep constitutive model to standard ADINA FEM. Numerical simulation of the shaft well excavation process and field measurement displacements of frozen wall were performed in the mine; and the results showed that the visco-elastic- plastic creep constitutive model was suitable and reasonable. This constitutive model could be significance for the frozen soil structure long-term stability analysing and the displacement forecasting.
URL http://hdl.handle.net/10.1016/j.coldregions.2010.08.006
Publication Type journal article
Record ID 65006613