Geotechnical characterization and stabilization of muskeg soils using the microbially induced calcite precipitation technique (MICP)
department or school: Applied Science, Faculty of
department or school: Engineering, School of (Okanagan)
data provider: DSpace
degree campus: UBCO
creator: Elmouchi, Ahmed
issued: 2021-05-01T07:00:00Z
issued: 2021
related degree: Doctor of Philosophy - PhD
degree grantor: University of British Columbia
description: Muskeg is the landform that describes the organic terrain. Muskeg soils are widespread in Canada. They cover around 15% of the Canadian landscape. Their problematic nature is attributed to their high compressibility and low shear strength when subjected to loads due to their high initial void ratio and water content. This study aims to investigate the problematic nature of Muskeg soils and provide a solution for their stabilization. Water and organic contents of Muskeg soils are the two primary index properties, and they are easy and inexpensive to determine. Therefore, many studies in the literature correlate the other index and compressibility with these two simply measured properties. An extensive review of the literature was conducted, and new correlations to determine some index and compressibility properties as a function of the organic and water contents were presented. These new proposed correlations would help the design engineers provide reasonable estimations in the concept design phase for projects that deal with this soil. Extensive laboratory and field testing programs were conducted for Muskeg soil samples retrieved from Bolivar Park, Surrey, British Columbia, Canada, to determine their geotechnical properties. New correlations for determining the maximum shear modulus Gmax as a function of the undrained shear strength Su, measured from the electronic vane shear test, and ball net tip resistance qb-net, measured from the ball penetration test, were demonstrated. Moreover, new correlations for the undrained shear strength Su as a function of the cone tip resistance qnet, measured from the seismic cone penetration test (SCPTu), and ball net tip resistance qb-net, measured from the ball penetration test (BPT), were presented. The excessive settlement of Muskeg soil was treated through the environmentally-friendly technique, the Microbially Induced Calcite Precipitation MICP using the urease active bioslurry approach. The results showed a substantial impr…
aggregated CHO: https://circle.library.ubc.ca/rest/handle/2429/78479
note: GEOTECHNICAL CHARACTERIZATION AND STABILIZATION OF MUSKEG SOILS USING THE MICROBIALLY INDUCED CALCITE PRECIPITATION TECHNIQUE (MICP) by Ahmed Elmouchi B.Sc., Cairo University, 2013 M.Sc. Cairo University 2017 A THESIS SUBMITTED IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF DOCTOR OF PHILOSOPHY in THE COLLEGE OF GRADUATE STUDIES (Civil Engineering) THE UNIVERSITY OF BRITISH COLUMBIA (Okanagan) May 2021 © Ahmed Elmouchi, 2021 ii The following individuals certify that they have read, and recommend to the College of Graduate Studies for acceptance, a thesis/dissertation entitled: GEOTECHNICAL CHARACTERIZATION AND STABILIZATION OF MUSKEG SOILS USING THE MICROBIALLY INDUCED CALCITE PRECEIPITAION TECHNIQUE (MICP) submitted by Ahmed Elmouchi in partial fulfillment of the requirements of the degree of Doctor of Philosophy . Dr. Sumi Siddiqua Supervisor Prof. Dharma Wijewickreme Supervisory Committee Member Dr. Ramy Saadeldin Supervisory Committee Member Dr. Jian Liu University Examiner Prof. Ron Wong External Examiner iii Abstract Muskeg is the landform that describes the organic terrain. Muskeg soils are widespread in Canada. They cover around 15% of the Canadian landscape. Their problematic nature is attributed to their high compressibility and low shear strength when subjected to loads due to their high initial void ratio and water content. This study aims to investigate the problematic nature of Muskeg soils and provide a solution for their stabilization. Water and organic contents of Muskeg soils are the two primary index properties, and they are easy and inexpensive to determine. Therefore, many studies in the literature correlate the other index and compressibility with these two simply measured properties. An extensive review of the literature was conducted, and new correlations to determine some index and compressibility properties as a function of the organic and water contents were presented. These new proposed correlations would help the design eng…
has type: Thesis/Dissertation
date issued: 2021-09
is shown at: 10.14288/1.0398191
language: eng
degree discipline: Civil Engineering
provider: Vancouver : University of British Columbia Library
publisher: University of British Columbia
rights: Attribution-NonCommercial-NoDerivatives 4.0 International
rights URI: http://creativecommons.org/licenses/by-nc-nd/4.0/
scholar level: Graduate
contributor: Siddiqua, Sumi
type: Text
identifier URI: http://hdl.handle.net/2429/78479