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荊永波¹  ,  武敖杰² ,  孫星亮² ,  韓小冬²

 

( 1 .  中鐵十四局集團隧道工程有限公司 ， 山東 濟南 ，250003 ;  2.  石家莊鐵道大學 ，河北 石家莊 050043)

摘   要 ：為提高富水粉細砂地層盾構同步注漿的效率和質量 ，精準控制管片上浮位移 ，進行配比試驗以期 得到對富水地層具有良好適應性的漿液。基于常規惰性漿液通過單因素試驗，確定出高分子材料羥乙基纖維素 (HEC)  和聚羧酸  (PC)  兩種外加劑的摻量范圍 ，然后采用正交試驗 ，對水膠比 、水玻璃 、羥乙基纖維素和聚羧酸4因素3水平的試驗結果進行極差分析 ，得到流動性好 、凝膠時間可控 、結石率高的復合漿液配合比。結果表明 ，針對富水粉細砂地層的復合漿液最佳配比為：水膠比 0. 8  ( A2) ,  水玻璃摻量30% ( B2) ,   PC 摻量 0. 1%  (C1) ,  HEC 摻量 0. 2%  (D2) ,   這一配比在保證流動性（ 稠度 10 ~ 12cm ) 、凝膠時間  (90 ~ 150s) 、結石率 (97 . 53% )  和抗壓強度  (2. 63MPa)  的同時 ，優化了漿液的抗水分散性和經濟性。采用推薦漿液配比進行同步注漿，管片的上浮位移可以控制在20mm 以內，滿足規范要求。

關鍵詞： 富水粉細砂地層 ；盾構隧道 ；漿液配比 ；正交試驗 ；管片上浮控制

中圖分類號：U454          

文獻標志碼：A            

文章編號： 1005- 8249 (2024)  04-0053- 06 

DOI:10. 19860/j.cnki.issn1005 - 8249.2024.04.010

 

JING Yongbo¹  ,  WU Aojie² ,  SUN Xingliang² ,  HAN Xiaodong²

( 1 . Tunnel Engineering Co. ，Ltd. ，China Railway 14th Bureau Group ,  Jinan 250003 ,  China;

2. Shijiazhuang Tiedao University ,  Shijiazhuang 050043 ,  China)

Abstract: In order to improve the efficiency and quality of synchronous grouting for shield tunneling in water rich fine sand formations, accurately control the upward displacement of pipe segments, and conduct proportioning tests in order to obtain a slurry with good adaptability to water rich formations. Based on the conventional inert slurry, the dosage range of two additives, hydroxyethyl cellulose (HEC) and polycarboxylic acid (PC), is determined by single factor test. Then, the range of test results of water binder ratio, water glass, hydroxyethyl cellulose and polycarboxylic acid in four factors and three levels is analyzed by orthogonal test, and the composite slurry mix ratio with good fluidity, controllable gel time and high stone rate is obtained. The results show that the optimal ratio of composite slurry for water rich silty fine sand formation is 0.8 (A2), 30% (B2), 0.1% (C1) and 0.2% (D2) of PC, PC, HEC. This ratio optimizes the water resistance dispersion and economy of the slurry while ensuring the fluidity (consistency 10~12cm), gel time (90~150s), stone rate (97.53%) and compressive strength (2.63 MPa). Adopting the recommended slurry ratio for synchronous grouting, the upward displacement of the pipe segment can be controlled within 20mm, meeting the regulatory requirements.

Keywords: rich water powder fine sand layer; shied tunnel; grout mix; orthogonal experiment; upward displacement of segment

 

*基金項目： 國家自然基金項目  (51978424) ;  中鐵十四局集團公司科技開發項目  (2021050288) 。 

作者簡介： 荊永波  (1984—) ,  男 ，本科 ，高級工程師 ，研究方向：地下工程施工與管理。

通信作者：孫星亮  (1970—) ,  男 ，博士 ，教授 ，研究方向： 復雜條件隧道施工力學。

 收稿日期：2023- 02- 24