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<p>Vacuum preloading technology is widely used to reinforce soft soil ground. However, the conventional vacuum preloading method has disadvantages, including a long reinforcement period and inferior reinforcement effects. To improve the treatment efficacy of soft ground, a novel prefabricated radiant drain (PRD), which combines vertical and horizontal drainage plates, is invented. This paper presents a series of laboratory model tests conducted with varying spacing of prefabricated horizontal drains (PHDs). The study results indicate that compared to the conventional PVD vacuum preloading method, the PRD vacuum preloading method increases water discharge by 13.10–56.00%, surface settlement by 4.08–12.58%, and vane-shear strength by 9.35–37.68%, while reducing soil water content by 8.26–32.07%. Notably, the spacing of PHDs significantly affects the reinforcement effect: when the PHD spacing decreases from 40 to 10&#xa0;cm, the water discharge increases by 37.88%, surface settlement increases by 8.16%, vane-shear strength increases by 10.53–27.27%, and water content decreases by 12.50–24.30%.</p>

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Reinforcement Effect of Soft Ground Treated by Prefabricated Radiant Drain (PRD) Vacuum Preloading

  • 期刊论文

  • 发表日期：

    2025年9月22日

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  • Shuangxi Feng,
  • Guoqing Zhang,
  • Huayang Lei,
  • Anyi Liu,
  • Qingjun Geng,
  • Shengpeng Yu

摘要

Vacuum preloading technology is widely used to reinforce soft soil ground. However, the conventional vacuum preloading method has disadvantages, including a long reinforcement period and inferior reinforcement effects. To improve the treatment efficacy of soft ground, a novel prefabricated radiant drain (PRD), which combines vertical and horizontal drainage plates, is invented. This paper presents a series of laboratory model tests conducted with varying spacing of prefabricated horizontal drains (PHDs). The study results indicate that compared to the conventional PVD vacuum preloading method, the PRD vacuum preloading method increases water discharge by 13.10–56.00%, surface settlement by 4.08–12.58%, and vane-shear strength by 9.35–37.68%, while reducing soil water content by 8.26–32.07%. Notably, the spacing of PHDs significantly affects the reinforcement effect: when the PHD spacing decreases from 40 to 10 cm, the water discharge increases by 37.88%, surface settlement increases by 8.16%, vane-shear strength increases by 10.53–27.27%, and water content decreases by 12.50–24.30%.