Foundation Failures Mitigation under Expansive Clay by Using Granular Pile Anchor System

Abstract

Expansive soils are found in typical areas in the world especially in arid and semi-arid regions. The problems associated with this type of soil drive geotechnical engineers to invent new technologies as remediation’s such as physical and chemical treatments. Innovative foundation techniques were also suggested for remedying the swell-shrink problems of the expansive soil. The granular pile anchor (GPA) is relatively a more favorable technique indebted to its cost-effective, easy and fast to assemble and most importantly was found to be more efficient in remedying the expansive soil. Despite the extensive studies on the expansive soil remedies, yet the granular pile anchor system requires more comprehensive and in-depth investigations. This study is aimed at developing a model with granular piles of various length and diameter extended to the stable zone to investigate the heave and uplift pressure in the expansive soil. For this purpose, experimental and numerical analysis were conducted in a small and in a full scale model respectively. A significant improvement was attained in heave reduction and an increment of uplift capacity. The findings also show that heave decreased significantly when the length and diameter of the GPA increases while the uplift capacity increased. However, it was noted that the extension of length to the stable zone resulted in insignificant changes. Therefore, it can be concluded that the maximum length of 6 m is the ideal length for GPA with different diameters according to foundations design requirement for this particular type of soil.

Property Risk Assessment for Expansive Soils in Louisiana

“…Geotechnical engineers typically include cementitious additives [e.g., lime (Kasangaki and Towhata, 2009;Jung and Santagata, 2014) and fly ash (Puppala et al, 2001;Nalbantoğlu 2004;Hozatlıoğlu and Yilmaz, 2021)], noncementitious additives [e.g., stone dust (Reddy et al, 2015)], chemical additives [e.g., calcium chloride or magnesium hydroxide (Bhuvaneshwari et al, 2020) or sodium silicate (Reddy et al, 2015)], or gypsum (e.g., Yilmaz and Civelekoglu, 2009) as a stabilizing agent. Guar gum biopolymers (Acharya et al, 2017), commercially available polymers (Taher et al, 2020), wood/paper industry waste (Ijaz et al, 2020), hydrophobic polyurethane foam (Al-Atroush and Sebaey, 2021), along with physical methods such as granulated tire rubber (Patil et al, 2011) and pile anchoring systems (Sfoog et al, 2020) have also been suggested. Comprehensive experiments on expansion rates and treatment options for expansive soils are provided in Al-Rawas and Goosen (2006) and Zumrawi et al (2017).…”

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“…Geotechnical engineers typically include cementitious additives [e.g., lime (Kasangaki and Towhata, 2009;Jung and Santagata, 2014) and fly ash (Puppala et al, 2001;Nalbantoğlu 2004;Hozatlıoğlu and Yilmaz, 2021)], noncementitious additives [e.g., stone dust (Reddy et al, 2015)], chemical additives [e.g., calcium chloride or magnesium hydroxide (Bhuvaneshwari et al, 2020) or sodium silicate (Reddy et al, 2015)], or gypsum (e.g., Yilmaz and Civelekoglu, 2009) as a stabilizing agent. Guar gum biopolymers (Acharya et al, 2017), commercially available polymers (Taher et al, 2020), wood/paper industry waste (Ijaz et al, 2020), hydrophobic polyurethane foam (Al-Atroush and Sebaey, 2021), along with physical methods such as granulated tire rubber (Patil et al, 2011) and pile anchoring systems (Sfoog et al, 2020) have also been suggested. Comprehensive experiments on expansion rates and treatment options for expansive soils are provided in Al-Rawas and Goosen (2006) and Zumrawi et al (2017).…”