理论与试验研究

盾构施工中克泥效浆液的流变特性试验研究

  • 黄志 ,
  • 夏明 ,
  • 徐毅勇 ,
  • 石晓阳 ,
  • 张志强
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  • 1.中铁五局集团有限公司,长沙 410007;
    2.南昌轨道交通集团有限公司,南昌 330038;
    3.西南交通大学 土木工程学院,成都 610031
黄志(1971—),男,湖南邵阳人,高级工程师,主要从事市政工程施工及管理方面的工作。E-mail:huangzhijx@163.com
张志强(1968—),男,四川荣县人,博士,教授,主要从事隧道与地下工程方向的研究工作。E-mail:clarkchang68@163.com

收稿日期: 2024-11-21

  网络出版日期: 2025-06-13

基金资助

国家自然科学基金高铁联合基金(U1934213);南昌轨道交通集团科研项目(2019HGKYB003)

Experimental Study on the Rheological Properties of Clay Shock Slurry for Shield Construction

  • Huang Zhi ,
  • Xia Ming ,
  • Xu Yiyong ,
  • Shi Xiaoyang ,
  • Zhang Zhiqiang
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  • 1. China Railway No.5 Engineering Group Co., Ltd., Changsha 410007, P.R. China;
    2. Nanchang Rail Transit Group Limited Corporation, Nanchang 330038, P.R. China;
    3. School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, P.R. China

Received date: 2024-11-21

  Online published: 2025-06-13

摘要

盾构隧道近接既有结构穿越工程中逐步引进克泥效工法进行辅助施工,克泥效浆液的流变特性对中盾注浆施工有着重要影响。基于克泥效浆液的材料成分分析,研究克泥效浆液的水化搅拌机理和流变性能。采用RVDV-1T无极变速旋转黏度计对克泥效浆液开展流变试验,对比常用剪切稀化流变模型表征克泥效浆液流变特性的适用性,分析搅拌时间、搅拌速率、水化时间、A液水粉比对克泥效浆液流变性能的影响。并依托实际工程对克泥效浆液在地层中的渗透扩散性进行研究。结果表明:(1)宾汉姆模型表征克泥效浆液流变特性的适用性更高;(2)克泥效表观黏度和屈服应力随搅拌时间、搅拌速率的增加先增后减;随水化时间的增加而增大;随A液水粉比的增大整体呈下降趋势;(3)“渗透区”土体受到克泥效浆液注入影响产生黏聚作用,土体强度提高;(4)浆液在砂砾地层的渗透扩散距离为5~10 cm,扩散距离和浆液表观黏度和屈服应力呈强烈负相关趋势,与地层渗透系数和孔隙率呈正相关趋势。研究成果可为克泥效工法的工程运用提供参考。

本文引用格式

黄志 , 夏明 , 徐毅勇 , 石晓阳 , 张志强 . 盾构施工中克泥效浆液的流变特性试验研究[J]. 地下空间与工程学报, 2025 , 21(3) : 968 -976 . DOI: 10.20174/j.JUSE.2025.03.25

Abstract

The clay shock method is gradually introduced as auxiliary construction in the shield tunnel that crosses the existing structures. The rheological properties of the clay shock slurry have an important influence on the backfilling injection construction of mid-shield. The hydration mechanismand rheological properties of the slurry are investigated based on the analysis of the material composition of the clay shock slurry. The RVDV-1T rotational viscometer with stepless speed regulation was used to carry out the rheological test. The applicability of the commonly used shear-thinning rheological model to characterize the rheological properties of the clay shock slurries was studied. The effects of stirring time, stirring rate, hydration time, and water-powder ratio on the rheological properties of the clay shock slurries were analyzed. The permeability and diffusion of the clay slurry in the stratum were investigated based on the actual project. The research results are as follows. (1) The Bingham model is more suitable for characterizing the rheological properties of the clay shock slurries. (2) The apparent viscosity and yield stress of clay shock slurry initially increase and then decrease with increasing stirring time and stirring rate. They also increase with increasing hydration time and decrease with increasing water-powder ratio of component A. (3) The soil in the infiltration zone is affected by the injection of the clay slurry, resulting in cohesive effect and an increase in strength. (4) The penetration diffusion distance of the slurry in the sand and round gravel strata is between 5 and 10 cm. The apparent viscosity and the yield stress of the slurry have a strong negative correlation with the diffusion distance. The permeability coefficient and the porosity of the stratum correlate positively with the diffusion distance. The research results provide reference for the engineering application of the clay shock method.

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