昆明地铁盾构选型设计分析与探讨

研究目的:随着昆明地铁建设的快速推进,地下区间隧道陆续开工进入盾构施工阶段,在环滇池冲沉积层复杂水文地质及主城区特殊施工环境情况下,如何在盾构主要系统选型设计方面取得优势,将盾构施工对周围环境的影响降到最低成为亟待解决的问题。本文针对目前昆明地铁掘进中的盾构施工情况及其他城市地铁盾构施工经验,对昆明地铁特殊地质情况下盾构主要系统选型设计进行了比较、分析和探讨。研究结论:昆明地铁除施工过程中采取必要的技术措施外,首先在盾构机机体尺寸结构、刀盘、推进及掘进等主要系统选型设计上保证良好的施工环境适应性,而从根本上降低掘进过程中的风险才是关键。

Analysis and Discussion on Shield Lectotype Design for Kunming Metro

Research purposes:With the rapid construction of the Kunming metro,the shield construction begins to the sectional tunnel.How to make the lectotype of the main shield system to reduce the impact of the shield construction on the environment under the complicated hydrological condition of the sedimentary deposit of the Dianchi Lake and the special construction conditions is an urgent problem to be solved.According to the situation of shield excavation and based on the experience of the shield construction of the metro in other cities,this paper analyzes and discusses the tectotype of the main shield system to be used under the special geological conditions of the Kunming metro. Research conclusions:The adaptabilities of the lectotype designs of the main shield system to the construction condition,such as physical structure,cutter head,drilling and excavation of shield machine,should be ensured to reduce the excavation risk except the necessary measures should be taken.