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June 3, 2026Journal of Hydraulic Engineering0 citations

Diffusion mechanism of negative pressure induced grouting in inclined fractures under flowing water conditions

JLJie LiuJLJian LiRWRuihong WANG

Key Points

  • This research aims to explore the diffusion mechanism of negative pressure suction grouting in inclined fractures under flowing water conditions.
  • Used a visual suction grouting experimental device to analyze the effects of fracture angle, water flow rate, and grouting pressure on slurry diffusion.
  • Developed a diffusion model under suction conditions to derive equations for reverse and lateral diffusion distances.
  • Conducted experiments to improve slurry diffusion area with suction effect.
  • At 0° fracture angle, slurry diffusion area increased by up to 48% with suction effect compared to no suction.
  • Slurry diffusion exhibited a U-shape influenced by water flow during suction.
  • Increased grouting pressure significantly enlarged the diffusion range, while negative pressure suction effectively mitigated adverse effects of flowing water.

Abstract

为解决混凝土防渗墙裂隙在动水条件下注浆修复问题,需探究倾斜裂隙负压抽吸-动水注浆的扩散机制。本文通过自主研发的可视化裂隙动水注浆抽吸试验装置,重点分析裂隙倾角、动水流量、注浆压力对浆液扩散的影响,并研究抽吸作用对浆液扩散提升效果,通过建立抽吸作用下裂隙动水注浆扩散模型,推导逆水扩散距离、横向扩散距离与浆液扩散面积的计算表达式。研究结果表明:0°裂隙倾角下,加入抽吸作用后浆液扩散面积较无抽吸时最大提升48%,动水抽吸作用下浆液扩散呈u型,裂隙倾角增大使扩散面积减小,注浆压力提升可显著扩大扩散范围,而负压抽吸能有效削弱动水对注浆的不利影响,扩散模型理论扩散面积和实际面积最大相对误差不超过12.1%,平均相对误差为4.2%。本文模型可描述浆液扩散规律,能为抽吸条件下防渗墙裂隙动水注浆修复提供技术支撑。

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Cite This Study

Liu et al. (2026) studied this question.

synapsesocial.com/papers/6a1fc4bbdee9eb8c0dce6381https://doi.org/10.3724/j.slxb.20250732
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