MJS 联合微扰动注浆在地铁隧道 收敛变形整治中的应用研究

为进一步提升运营地铁隧道收敛变形的综合整治效果，提出 MJS 联合微扰动注浆整治技术，并应用于 杭州某运营地铁隧道收敛变形整治施工工程。通过分析整治施工前后隧道变形动态跟踪的监测数据与隧道断面 扫描成果，探讨联合整治对于隧道变形的整治效果，总结微扰动注浆施工引起隧道收敛的变形规律。研究结果 表明：MJS 联合微扰动注浆施工对于地铁隧道收敛变形整治效果显著，有效解决注浆结束后隧道收敛二次回弹 及注浆期间隧道产生附加变形的问题；微扰动注浆施工应重点保证前两次注浆的施工质量，并控制同一注浆孔 位间隔时间。

Application of MJS Combined with Micro-disturbance Grouting in Renovation of Convergence Deformation of Subway Tunnel

This study proposes a renovation technology, combining Metro Jet System (MJS) and micro-perturbation grouting, aimed at improving the renovation effect of the convergence deformation in operating subway tunnels. This technique was applied to a renovation project addressing convergence deformation in an active subway tunnel in Hangzhou. The effectiveness of this combined renovation on operating tunnels was examined by analyzing the measured data of tunnel deformation both pre- and post-renovation. In addition, the tunnel deformation patterns resulting from micro-perturbation grouting were summarized. Results revealed that the combined MJS and micro-disturbance grouting renovation technique significantly improved the convergence deformation of the subway tunnel. It effectively addressed the issues of secondary rebound of tunnel convergence after grouting and additional deformation during the grouting process. This work emphasizes the importance of ensuring the construction quality of twice grouting and controlling the interval time of the same grouting hole during micro-disturbance grouting construction.