杭州地铁2号线盾构软土区过硬岩技术研究

摘要

鉴于杭州地铁2号线在软土地层中突遇强度较高的石英硬岩岩脉，对后阶段设计采用何种思路、施工采用何种方法、因此如何选择合理的施工方案、采用合适的开挖设备，对设计和施工均提出了较高要求，通过既有成功施工案例的研究，对杭州地铁2号线盾构在软土区过硬岩进行分析、探讨，并结合该工程特定地质、环境条件进行分析和研究，最终采用合理的盾构机选型，对刀盘进行改造及刀具优化，很好地控制地面沉降，确保该区间的顺利贯通。%In view of Hangzhou metro line 2 in soft soil layer with hard rock quartz vein, the applicable concept, construction method and equipment need to be addressed in post design. With reference to successful practices in this regard, this paper analyzes the geological and environmental conditions of the metro line and concludes that the adoption of reasonable shield machine, improvement of cutter and optimization of tools serve to control ground settlement and ensure successful passing through.