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<p>Researchers were experiencing many challenges in the area of soil improvement. For a long time, researchers have used various ground improvement techniques and methods. Several factors such as soil type, equipment availability, cost, construction period, skills, and past experiences govern the selection of a soil improvement method. Ground improvement technique includes compaction by dynamic approaches for densification of ground in which compaction is done by dropping a heavy weight from a desired height. It includes various tampers with different shapes and sizes. In this study, the behaviour of the low-compressibility silt when it is subjected to a conical-shaped tamper, which is designed indigenously in the workshop, has been analysed. The CPT (standard cone penetration test) equipment has been utilized to investigate cone resistance, friction resistance and friction ratio for detecting the compaction phenomenon up to a depth of 4.5&#xa0;m. Consequently, the use of the conical tamper resulted in an increase in cone resistance, reaching 28% of that of loose soil. A similar occurrence was observed with frictional resistance; however, the friction ratio was greater in loose soil than in compacted soil. Furthermore, the depth of improvement reached 4.5&#xa0;m, consistent with theoretical calculations. The energy generated by the conical shape was significantly greater than that of the traditional tampers addressed in this study.</p>

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Performance of a Conical Tamper for Dynamic Compaction of Low-Compressibility Silt Soil Using CPT Assessment

  • 期刊论文

  • 发表日期：

    2026年1月8日

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  • Padmsen Shubham,
  • Sneha Gupta,
  • Sathish Kumar Palaniappan

摘要

Researchers were experiencing many challenges in the area of soil improvement. For a long time, researchers have used various ground improvement techniques and methods. Several factors such as soil type, equipment availability, cost, construction period, skills, and past experiences govern the selection of a soil improvement method. Ground improvement technique includes compaction by dynamic approaches for densification of ground in which compaction is done by dropping a heavy weight from a desired height. It includes various tampers with different shapes and sizes. In this study, the behaviour of the low-compressibility silt when it is subjected to a conical-shaped tamper, which is designed indigenously in the workshop, has been analysed. The CPT (standard cone penetration test) equipment has been utilized to investigate cone resistance, friction resistance and friction ratio for detecting the compaction phenomenon up to a depth of 4.5 m. Consequently, the use of the conical tamper resulted in an increase in cone resistance, reaching 28% of that of loose soil. A similar occurrence was observed with frictional resistance; however, the friction ratio was greater in loose soil than in compacted soil. Furthermore, the depth of improvement reached 4.5 m, consistent with theoretical calculations. The energy generated by the conical shape was significantly greater than that of the traditional tampers addressed in this study.