兰州市水源地建设工程输水隧洞双护盾TBM破碎带受阻处理经验

Experience in blocking treatment of double-shield TBM rupture zone in the water conveyance tunnel of Lanzhou Water Source Construction Project

遭遇破碎带是TBM掘进中的重大风险。掘进受阻处理是施工处理技术难点。本文以兰州市水源地建设工程为例,详细记述了采取"化灌止浆墙+超前灌浆"处理措施,双护盾TBM成功通过破碎带的施工过程,并提出了地质勘察及预报、破碎带处理准备及实施、双护盾TBM设计改进三个方面的建议,可为此类工程提供借鉴。

It is a major risk in TBM tunneling to encounter the rupture belt.How to deal with tunneling blocking is a difficult problem in construction treatment.Water source construction project of Lanzhou is adopted as an example.The construction process of the double shield TBM successfully passing through the fracture zone by using ‘chemical perfusion slurry wall ＋ advanced grouting＇treatment measures is accounted in detail in the paper.Suggestions in three aspects of geological investigation and forecast,fracture zone processing preparation and implementation,double-shield TBM design improvement are proposed,thereby providing reference for similar projects.