南宁地铁苏安区间富水圆砾层盾构选型及适应性研究

The Shield' s Model Selection and Adaptability Research of the Nanning Metro Su An Section in Productively Aquiferous Round Gravel Layer

随着我国隧道施工技术的不断发展,越来越多的城市地铁隧道采用盾构法施工。其作业环境好、安全性高、施工速度快、隧道质量高、对周围环境影响小、地表沉降易于控制等优越性明显。运用盾构法施工,盾构机的性能及其与地质条件的适应性是盾构隧道施工成败的关键。本文以南宁地铁为例,阐述了盾构选型的关键因素及长距离穿越富水圆砾层的技术要点。

With the development of tunnel construction technology in China, more and more urban subway tunnels are constructed by shield due to its obvious advantages over other techniques, including better working environment, higher standard safety, higher speed of construction, better quality, smaller influence on the surrounding environ- ment and the controllability of ground surface settlement. The performance of shield machine and the adaptability to geological conditions are the keys to the success of the tunnel construction with shield. This paper elaborates the key factors of shield＂ s model selection and technical points of crossing the long productively aquiferous round gravel layer.