为解决双护盾TBM在城市轨道交通隧道施工过程中遇到的始发场地受限不具备施作始发洞条件，双线小净距隧道掘进和频繁过站工效低、经济性差等工程难题，以青岛地铁1号线为背景，总结双护盾TBM应用于青岛地铁2号线的经验，结合青岛地铁1号线的具体工况和TBM设备特点，发展并实施基于掘进模式、掘进参数和姿态控制的双护盾TBM负环始发技术，基于先行隧道加装移动式支撑台车和袖阀管注浆加固的双线隧道小净距掘进技术和基于换装预制钢支腿的后配套台车“踩高跷”过站技术。这些施工技术的创新应用成功应对了青岛地铁1号线施工过程中遇到的特殊工况。
When a doubleshield tunnel boring machine
(TBM) is applied in urban rail transit, there are always several limitations,
such as no condition for launching shaft construction, low construction
efficiency due to doubletrack smallspacing excavation and frequent station passing, and low economic
benefit. Accordingly, a case study is conducted on Qingdao metro line 1.
Further, the applicable experience of doubleshield TBM
used in Qingdao metro line 2 is studied, and detailed conditions of line 1 and
the TBM characteristics are analyzed; thus, a suite of negative ring launching
techniques of doubleshield TBM based on tunneling
mode, parameters, and attitude control is developed. The techniques include
doubletrack smallspacing
tunnel excavation realized by a movable support trolley installed in the
advance tunnel and Soletanche grouting reinforcement and backup trolley stationpassing technology
realized by precast steel support replacement. The application of the
techniques shows a good effect in Qingdao metro line 1.
