浅埋暗挖隧道铣挖开挖方法研究

Research on milling excavation method in urban shallow tunnel construction

隧道暗挖法施工具有对地面交通干扰小、对环境污染少等优点,在越来越多的城市隧道工程中被采用,但施工爆破振动和噪声会给城市居民生活造成一定影响。结合杭州市紫之隧道浅埋暗挖段的施工情况,对多种隧道开挖技术进行比较,分析控制爆破开挖方法对周边环境的影响,提出采用铣挖开挖施工的方案,并对施工效果从开挖成形、地表沉降、施工进度和经济指标等方面进行了分析。

Tunnel excavation method has such advantages as less interference to ground traffic, less environmental pollution, etc. ,which was adopted by city tunnel engineering in growing number. However, the vibration and noise of the construction have certain adverse impact on the life of nearby residents. Based on the construction situations of the shallow-buried excavation section of Zi zhi tunnel, a comparison among different tunnel excavation methods was carried out, and the influence of controlled blasting excavation method on surrounding environment was analyzed. Milling excavation method was put forward on that basis, and the construction performance was evaluated from the aspect of excavation shape, surface settlement, construction progress, economic indicators and so on.