双液浆施工盾构隧道管片上浮特征分析

作者：单晓波¹,秦楠²,武文清¹,柳献²

作者简介：

单晓波,工程师,E⁃mail: 1556239432@ qq. com

作者单位：

1. 中铁十四局集团大盾构工程有限公司,江苏南京 211800; 2. 同济大学土木工程学院,上海 200092

基金项目：

∗中铁十四局集团有限公司科研课题(202214jtky0070)

摘要：

双液浆具有胶凝时间短、早期强度高的特点,在控制管片上浮中具有显著作用. 为了解双液浆施工下盾构隧道的上浮特征,总结了盾构隧道双液浆施工工艺,提出了盾构隧道管片上浮监测和计算方法. 依托江心洲二通道隧道工程,分析了双液浆施工盾构隧道管片上浮时序和纵向特征. 通过上浮数据分析表明:管片上浮在时序上可分为线性发展和稳定阶段,其中线性发展阶段为管片上浮控制的关键,而其所经历时间由浆液终凝时间所决定;验证了双液浆对于管片上浮控制的有效性.

关键词：隧道;盾构;双液浆;上浮;试验

English：

Cement⁃sodium silicate grout, which has the characteristics of short setting time and high earlystrength, plays a significant role in controlling the buoyancy of the tunnel segments. To better understandthe buoyancy characteristics of shield tunnel segments in the construction of cement⁃sodium silicate grout,this paper first summarized the construction process of shield tunnel segments with dual⁃liquid slurry andproposed a monitoring and calculation method for the buoyancy of shield tunnel segments. Based on theChannel⁃II Tunnel Project of the Jiangxinzhou Sewage Collection System, the buoyancy timing andlongitudinal characteristics of shield tunnel segments during the construction of cement⁃sodium silicategrout were analyzed. The analysis of buoyancy data indicates that the buoyancy of tunnel segments can bedivided into linear development and stable stages in terms of timing, with the linear development stagebeing the key to buoyancy control, and its duration is determined by the slurry’s final setting time. Theeffectiveness of cement⁃sodium silicate grout in controlling segment buoyancy has been verified.

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岩土与地下工程 > 2025年 第卷 第13期