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张兴其¹ ,  张坤勇^{2 , 3} ,  张    梦⁴ ,  沈小锐³ ,  李俊吉³

( 1 .  合肥市市政设计研究总院有限公司 ，安徽 合肥 230071 ;  2.  河海大学 岩土力学与堤坝工程

教育部重点实验室 ，江苏 南京 210024 ;  3 .  河海大学 岩土工程科学研究所 ，江苏 南京 210024 ;

4. 南京市房屋安全服务中心 ，江苏 南京 210029)

摘   要 ：地下空间开发向大断面、长距离发展，顶推力随距离增加而增大，合理控制顶推力成为关键。减阻泥浆作为施工重要材料 ，具有减阻润滑和支撑地层作用，其性能直接影响施工效果。依托合肥滨湖科学城庐 州大道浅埋隧道段，开展膨胀土地区减阻泥浆配比研究， 以提升大断面管幕箱涵顶进效率。通过正交试验，研究膨润土、羧甲基纤维素钠  (CMC)  和纯碱对泥浆减阻性能的影响，测试漏斗黏度 、析水率和失水量以评估效 果。结果表明：膨润土可显著降低失水量和析水率，但过高会降低流动性 ；CMC 含量为 0. 1% 时析水率最小 ；纯 碱含量为 0. 3% 时效果最佳。最终确定最优配比为膨润土∶C MC ∶纯碱为 8% ∶0. 1% ∶0. 3% ,  为膨胀土地区管幕箱 涵顶进施工提供了可靠配方。

关键词：减阻泥浆 ；管幕箱涵 ；减阻性能 ；泥浆配比

中图分类号：TU43           

文献标志码：A            

文章编号： 1005- 8249  (2024)  06- 0068- 05 

DOI:10. 19860/j.cnki.issn1005 - 8249.2024.06.013

 

ZHANG Xingqi ¹  ,  ZHANG Kunyong^2 , 3 ,  ZHANG Meng⁴ ,  SHEN Xiaorui³ ,  LI Junji³

( 1 . Hefei Municipal Design & Research Institute Co. ，Ltd. ，Hefei 230071 ,   China;  2. Key  Laboratory

of Ministry of Education for Geomechanics and E mbankment Engineering ,   Hohai University ,

Nanjing 210024 ,  China;  3 . Geotechnical Research Institute of Hohai University ,  Nanjing 210024 ,  China;

4. Nanjing Housing Safety Service Center ,  Nanjing 210029 ,   China)

Abstract: The development of underground spaces is advancing towards larger cross-sections and longer distances, with jacking force increasing proportionally to the jacking distance. Therefore, effectively controlling the jacking force has become essential. Anti-friction slurry, as a crucial construction material, plays a role in reducing friction, providing lubrication, and supporting the surrounding strata, with its performance directly affecting construction outcomes. Relying on the shallow-buried tunnel section of Luzhou Avenue in the Binhu Science City of Hefei, this study focuses on optimizing the anti-friction slurry mix ratio for expansive soil areas to enhance the efficiency of large-section pipe-jacking construction. Using orthogonal experiments, the effects of bentonite, carboxymethyl cellulose (CMC), and soda ash on the slurry’s anti-friction performance were studied. Funnel viscosity, water separation rate, and water loss were tested to evaluate the performance. The results showed that increasing the bentonite content significantly reduces water loss and water separation rates, but excessive amounts decrease fluidity. A CMC content of 0.1% achieves the lowest water separation rate, while soda ash demonstrates optimal performance at a content of 0.3%. The final optimal mix ratio was determined as bentonite: CMC: soda ash = 8%: 0.1%: 0.3%, providing a reliable formula for pipe-jacking construction in expansive soil areas.

Keywords: drag reduction mud; pipe curtain box culvert; drag reduction performance; ratio of slurry

作者简介： 张兴其  (1979—) ,  男 ，硕士 ，高级工程师 ，研究方向：城市隧道及地下工程设计。

收稿日期：2023 - 05 - 27