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<p>In an attempt to minimize soil pressures and settlements, this study proposed a variety of footing patterns that rest on clay soil layers that have been experiencing swelling for a while. Experiments are conducted to investigate the geotechnical behavior of different footing base shapes situated on expansive, saturated clay soil. Convex, serrated, ribbed, flat, and concave footing bases were evaluated as alternatives to conventional flat-bottom shallow footings in order to minimize the impact of swelling on the stability of the structures. The results revealed that the swelling response is significantly influenced by the footing’s base shape. For convex, serrated, and ribbed footings, the swelling pressures were 87.3 kPa, 99.1 kPa, and 124.6 kPa, respectively, while for flat and concave footings, they were 155 kPa and 159.9 kPa. The convex base form footing efficiently lowered the swelling pressure on the structure.</p>

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Variation of the Volume Change of Expansive Soil with the Shape of Footing Base

  • 期刊论文

  • 发表日期：

    2025年2月5日

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  • Saif Zuhair Sultan,
  • Moataz A. Al-Obaydi

摘要

In an attempt to minimize soil pressures and settlements, this study proposed a variety of footing patterns that rest on clay soil layers that have been experiencing swelling for a while. Experiments are conducted to investigate the geotechnical behavior of different footing base shapes situated on expansive, saturated clay soil. Convex, serrated, ribbed, flat, and concave footing bases were evaluated as alternatives to conventional flat-bottom shallow footings in order to minimize the impact of swelling on the stability of the structures. The results revealed that the swelling response is significantly influenced by the footing’s base shape. For convex, serrated, and ribbed footings, the swelling pressures were 87.3 kPa, 99.1 kPa, and 124.6 kPa, respectively, while for flat and concave footings, they were 155 kPa and 159.9 kPa. The convex base form footing efficiently lowered the swelling pressure on the structure.