A numerical study of the installation-induced stresses and excess pore-water pressures around rigid inclusions using a linear-elastic perfectly-plastic soil

Citation data:

Geotechnical Special Publication, ISSN: 0895-0563, Vol: GSP 256, Page: 2214-2224

Publication Year:
2015

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Repository URL:
http://scholarsmine.mst.edu/civarc_enveng_facwork/889
DOI:
10.1061/9780784479087.205
Author(s):
Rivera, Alfonso J.; Olgun, C. Guney; Brandon, Thomas L.; Masse, Frederic
Publisher(s):
American Society of Civil Engineers (ASCE)
Tags:
Engineering; Earth and Planetary Sciences; Pore Pressure; Pressure Distribution; Soils; Water; Construction Procedures; Construction Process; Cylindrical Cavity Expansion; Dissipation Of Excess Pore Water Pressure; Earth Pressure Coefficient; Excess Pore Water Pressure; Finite Element Software; Load Bearing Capabilities; Finite Element Method; Pore Pressure; Pressure Distribution; Soils; Water, Construction Procedures; Construction Process; Cylindrical Cavity Expansion; Dissipation Of Excess Pore Water Pressure; Earth Pressure Coefficient; Excess Pore Water Pressure; Finite Element Software; Load Bearing Capabilities, Finite Element Method; Geological Engineering; Structural Engineering
conference paper description
Rigid inclusions are used to improve the load-bearing capabilities of poor soils. The construction procedure for grouted rigid inclusions in the field involves displacement of the soft soil producing changes in pore-water pressures, and as a result, changes in effective stresses in the immediate vicinity of these elements. A numerical study was performed to examine the post-construction changes in the installation-induced stresses and pore-water pressures around the rigid inclusions. The finite element software PLAXIS was used in the numerical analysis. The soft soil is modeled as a linear elastic perfectly plastic Tresca material. Cylindrical cavity expansion is implemented in the finite element models to represent the rigid inclusion construction process. The results indicate that the installation-induced stresses in the vicinity of the rigid inclusions expressed in the form of earth pressure coefficient K, increase with the dissipation of excess pore-water pressures.