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張興其¹ ,  張坤勇^{2 , 3} ,  張    夢⁴ ,  沈小銳³ ,  李俊吉³

( 1 .  合肥市市政設(shè)計研究總院有限公司 ，安徽 合肥 230071 ;  2.  河海大學(xué) 巖土力學(xué)與堤壩工程

教育部重點實驗室 ，江蘇 南京 210024 ;  3 .  河海大學(xué) 巖土工程科學(xué)研究所 ，江蘇 南京 210024 ;

4. 南京市房屋安全服務(wù)中心 ，江蘇 南京 210029)

摘   要 ：地下空間開發(fā)向大斷面、長距離發(fā)展，頂推力隨距離增加而增大，合理控制頂推力成為關(guān)鍵。減阻泥漿作為施工重要材料 ，具有減阻潤滑和支撐地層作用，其性能直接影響施工效果。依托合肥濱湖科學(xué)城廬 州大道淺埋隧道段，開展膨脹土地區(qū)減阻泥漿配比研究， 以提升大斷面管幕箱涵頂進(jìn)效率。通過正交試驗，研究膨潤土、羧甲基纖維素鈉  (CMC)  和純堿對泥漿減阻性能的影響，測試漏斗黏度 、析水率和失水量以評估效 果。結(jié)果表明：膨潤土可顯著降低失水量和析水率，但過高會降低流動性 ；CMC 含量為 0. 1% 時析水率最小 ；純 堿含量為 0. 3% 時效果最佳。最終確定最優(yōu)配比為膨潤土∶C MC ∶純堿為 8% ∶0. 1% ∶0. 3% ,  為膨脹土地區(qū)管幕箱 涵頂進(jìn)施工提供了可靠配方。

關(guān)鍵詞：減阻泥漿 ；管幕箱涵 ；減阻性能 ；泥漿配比

中圖分類號：TU43           

文獻(xiàn)標(biāo)志碼：A            

文章編號： 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

作者簡介： 張興其  (1979—) ,  男 ，碩士 ，高級工程師 ，研究方向：城市隧道及地下工程設(shè)計。

收稿日期：2023 - 05 - 27