赵卫全, 张金接, 邢占清, 符平. 2018: 富水圆砾层地铁联络通道综合灌浆防渗加固处理. 工程地质学报, 26(s1): 234-240. DOI: 10.13544/j.cnki.jeg.2018153
    引用本文: 赵卫全, 张金接, 邢占清, 符平. 2018: 富水圆砾层地铁联络通道综合灌浆防渗加固处理. 工程地质学报, 26(s1): 234-240. DOI: 10.13544/j.cnki.jeg.2018153
    ZHAO Weiquan, ZHANG Jinjie, XING Zhanqing, FU Ping. 2018: COMPREHENSIVE GROUTING FOR THE CROSS-PASSAGE REINFORCEMENT OF SUBWAY TUNNEL IN WATER-RICH ROUND GRAVEL STRATUM. JOURNAL OF ENGINEERING GEOLOGY, 26(s1): 234-240. DOI: 10.13544/j.cnki.jeg.2018153
    Citation: ZHAO Weiquan, ZHANG Jinjie, XING Zhanqing, FU Ping. 2018: COMPREHENSIVE GROUTING FOR THE CROSS-PASSAGE REINFORCEMENT OF SUBWAY TUNNEL IN WATER-RICH ROUND GRAVEL STRATUM. JOURNAL OF ENGINEERING GEOLOGY, 26(s1): 234-240. DOI: 10.13544/j.cnki.jeg.2018153

    富水圆砾层地铁联络通道综合灌浆防渗加固处理

    COMPREHENSIVE GROUTING FOR THE CROSS-PASSAGE REINFORCEMENT OF SUBWAY TUNNEL IN WATER-RICH ROUND GRAVEL STRATUM

    • 摘要: 南宁某地铁联络通道(兼废水泵房)洞身大部分位于富水圆砾层中,前期采用了地下连续墙+袖阀管灌浆的防渗加固处理措施,但未能达到预期处理目的。针对该联络通道圆砾层厚度大、透水性强、自稳性差等特点和难点,研究提出了地表水泥膏浆结合稳定性浆液加固+洞内AC-MS丙烯酸盐化学灌浆防渗的综合灌浆方案,成功解决了该富水圆砾层的防渗加固难题。开挖及监测结果表明富水圆砾层经综合灌浆处理后颗粒胶结良好,固结体坚硬、密实,围岩稳定、渗透性显著减小,开挖过程中未发生坍塌、失稳和涌水、涌泥等现象,防渗加固效果显著,可供类似工程参考。

       

      Abstract: Anti-seepage reinforcement measures such as underground continuous wall+sleeve valve tube grouting were adopted in one cross-passage of subway tunnel in Nanning, whose structure located in water-rich round gravel stratum, but they failed to achieve the expected treatment purpose. In view of the characteristics and difficulties of the cross-passage, such as large thickness, strong permeability, and poor self-stability of the gravel layer, the comprehensive grouting of cement-paste slurry combined with stable slurry reinforcement+AC-MS acrylate chemical grouting is proposed. The problem of anti-seepage reinforcement of the water-rich round gravel stratum was solved successfully. The excavation and monitoring results showed that the water-rich round gravel was well cemented. The cemented body was hard and dense. The stability and permeability was improved significantly after comprehensive grouting. No collapse, instability, and mud flow occurred during excavation. The anti-seepage reinforcement effect is remarkable which can take a reference for the similar engineering.

       

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