“囊袋扩张-电渗法”软土地层加固过程孔压演化规律研究

罗俊成; 周鲁; 唐垚峰; 刘胜利; 叶跃鸿

doi:10.19713/j.cnki.43-1423/u.T20251419

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“囊袋扩张-电渗法”软土地层加固过程孔压演化规律研究

轨道与基础 | 更新时间：2026-07-24

- “囊袋扩张-电渗法”软土地层加固过程孔压演化规律研究
- Excess pore pressure evolution during soft ground reinforcement by capsule expansion combined with electro-osmosis method
- 铁道科学与工程学报 2026年23卷第7期页码：3278-3285
- 作者机构：
  
  1.广州地铁设计研究院股份有限公司，广东广州 510010
  2.湖南大学土木工程学院，湖南长沙 410082
- 作者简介：
  
  罗俊成(1968—)，男，江西吉安人，高级工程师，从事轨道交通工程及地下工程等方面的研究；E-mail：582014475@qq.com
- 基金信息：
  
  广州地铁设计研究院股份有限公司科研课题;国家自然科学基金面上项目(52378338)
- DOI：10.19713/j.cnki.43-1423/u.T20251419
  中图分类号： TU44
- 收稿：2025-09-10，
  
  网络首发：2026-07-24，
  
  纸质出版：2026-07-28
- 稿件说明：
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罗俊成,周鲁,唐垚峰等.“囊袋扩张-电渗法”软土地层加固过程孔压演化规律研究[J].铁道科学与工程学报,2026,23(07):3278-3285.

LUO Juncheng,ZHOU Lu,TANG Yaofeng,et al.Excess pore pressure evolution during soft ground reinforcement by capsule expansion combined with electro-osmosis method[J].Journal of Railway Science and Engineering,2026,23(07):3278-3285.
罗俊成,周鲁,唐垚峰等.“囊袋扩张-电渗法”软土地层加固过程孔压演化规律研究[J].铁道科学与工程学报,2026,23(07):3278-3285. DOI： 10.19713/j.cnki.43-1423/u.T20251419.

LUO Juncheng,ZHOU Lu,TANG Yaofeng,et al.Excess pore pressure evolution during soft ground reinforcement by capsule expansion combined with electro-osmosis method[J].Journal of Railway Science and Engineering,2026,23(07):3278-3285. DOI： 10.19713/j.cnki.43-1423/u.T20251419.

摘要

我国滨海地区结构性软黏土因孔隙比大、含水量高、压缩性强等特点，易导致盾构隧道出现严重工后沉降及衍生病害，传统注浆加固面临效率低、扰动显著、效果不可控等瓶颈，严重威胁隧道结构安全与长期服役性能。传统注浆加固方法虽在一定程度上可缓解沉降问题，但其在实际应用中仍存在诸多瓶颈，如注浆效率低下、施工扰动显著、超孔隙水压力积聚导致再固结沉降等，限制了其在结构性软黏土中的广泛应用。为此，本文提出“囊袋扩张-电渗法”协同加固技术，通过囊袋约束浆液扩散实现精准体积置换，结合电渗驱动孔隙水迁移以加速超孔压消散。以福建淤泥夹砂层重塑土为试验材料，开展纯囊袋扩张与囊袋扩张-电渗联合室内模型对比试验，同步监测微型孔压计的超孔隙水压力时空演化规律。结果表明：纯囊袋扩张的超孔压演化具有距离依赖性，且扩张后超孔压消散缓慢，表明传统囊袋注浆易引起显著的超孔压积累；囊袋扩张-电渗联合作用下，电渗可显著降低超孔压峰值，且能加速超孔压消散，其效果与距阳极距离呈正相关。通过对比两种工况下的超孔压时空分布，发现电渗作用可有效缓解因囊袋扩张引起的超孔压积聚，验证了该协同技术在提升地基加固效率与控制工后沉降方面的潜力，为解决软土隧道沉降控制难题提供了新的技术路径与试验依据，具有重要的理论意义与工程应用价值。

Abstract

In coastal regions of China

structural soft clay is characterized by a large void ratio

high water content

and high compressibility

which often lead to severe post-construction settlement and secondary defects in shield tunnels. Conventional grouting reinforcement faces critical challenges such as low efficiency

significant disturbance

and uncontrollable performance

posing serious threats to the structural safety and long-term serviceability of tunnels. Although conventional grouting methods can alleviate settlement problems to some extent

they still suffer from several limitations in practical applications

including low grouting efficiency

pronounced construction disturbance

and post-reconsolidation settlement caused by excessive pore water pressure buildup. These issues restrict their widespread use in structural soft clay. To address these challenges

this study proposed a “capsule expansion combined with electro-osmosis method” cooperative reinforcement technique. The method employed capsule confinement to achieve precise volumetric replacement during slurry diffusion

while electro-osmosis drives pore water migration to accelerate the dissipation of excess pore pressure. Using remolded mucky soil with sand from Fujian as the test material

laboratory model tests were conducted under two conditions

which were the capsule expansion alone and capsule expansion combined with electro-osmosis. While miniature pore pressure transducers were used to monitor the spatiotemporal evolution of excess pore pressure. The results show that excess pore pressure during pure capsule expansion can exhibit a distance-dependent pattern and dissipates slowly after expansion

indicating that conventional capsule grouting tends to induce significant excess pore pressure accumulation. Under the combined action of capsule expansion and electro-osmosis

electro-osmosis significantly can reduce the peak excess pore pressure and accelerates its dissipation

with the effect positively correlated with the distance from the anode. By comparing the spatiotemporal distributions of excess pore pressure under the two conditions

it is found that electro-osmosis effectively alleviates the pressure buildup induced by capsule expansion. This verifies the potential of the coupled method in improving ground reinforcement efficiency and controlling post-construction settlement. The results can provide a new technical approach and experimental basis for addressing settlement control challenges in soft soil tunnels. The study holds significant theoretical importance and practical engineering value.

关键词

Keywords

references

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