A Numerical Study of the Installation-Induced Stresses and Excess Pore-Water Pressures Around Rigid Inclusions using a Linear-Elastic Perfectly-Plastic Soil

Abstract

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.

Meeting Name

International Foundations Congress and Equipment Expo 2015, IFCEE 2015 (2015: Mar. 17-21, San Antonio, TX)

Department(s)

Civil, Architectural and Environmental Engineering

Keywords and Phrases

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

International Standard Book Number (ISBN)

978-078447908-7

International Standard Serial Number (ISSN)

0895-0563

Document Type

Article - Conference proceedings

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2015 American Society of Civil Engineers (ASCE), All rights reserved.

Publication Date

01 Jan 2015

Link to Full Text

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