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<p>This study investigated the mechanical properties of several new drag-reducing materials to address the challenge of high frictional resistance during caisson sinking in cohesive soil layers. Laboratory and field tests were conducted on these materials, which include solid anionic polyacrylamide (APAM), amide fine powder, and xanthan gum. The study also examined liquid materials such as (nanopolymer), liquid polyacrylamide (drag reducer), and alkyl acrylamide-acrylic acid emulsion polymer (Wanyongwang). The results indicated that all of these materials achieved a drag reduction greater than 69% compared with the condition without drag-reducing slurry. Amide fine powder, and APAM showed relatively better performance. A drag-reducing slurry containing 0.15% amide fine powder was applied in an engineering project, increasing the average caisson sinking speed from 35 to 65&#xa0;cm per day, corresponding to an 85.7% increase in work efficiency. The results of this study can serve as a reference for the design and construction of similar engineering projects in the future.</p>

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Study of Mechanical Properties of Drag-Reducing Materials for Caissons in Cohesive Soil Layers

  • 期刊论文

  • 发表日期：

    2026年4月28日

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  • Dejie Li,
  • Cunxing Fang,
  • Fuxiang Chen

摘要

This study investigated the mechanical properties of several new drag-reducing materials to address the challenge of high frictional resistance during caisson sinking in cohesive soil layers. Laboratory and field tests were conducted on these materials, which include solid anionic polyacrylamide (APAM), amide fine powder, and xanthan gum. The study also examined liquid materials such as (nanopolymer), liquid polyacrylamide (drag reducer), and alkyl acrylamide-acrylic acid emulsion polymer (Wanyongwang). The results indicated that all of these materials achieved a drag reduction greater than 69% compared with the condition without drag-reducing slurry. Amide fine powder, and APAM showed relatively better performance. A drag-reducing slurry containing 0.15% amide fine powder was applied in an engineering project, increasing the average caisson sinking speed from 35 to 65 cm per day, corresponding to an 85.7% increase in work efficiency. The results of this study can serve as a reference for the design and construction of similar engineering projects in the future.