土压平衡盾构机通过地铁隧道矿山法段的回填掘进施工技术

Backfilling Technology for Earth Pressure Balanced Shield Driving through Subway Tunnel Section Built by Mining Method

地铁盾构法施工具有自动化程度高、施工速度快、对地面建筑物的影响小等诸多优点,但有些地段盾构机无法直接掘进通过,比如在线路穿越硬岩地层、桥梁及房屋桩基段,一般都先用矿山法施工,后盾构机通过。深圳地铁2号线东延线黄贝岭站—新秀站区间隧道通过沙湾桥段桩基托换段采用矿山法施工,以此为例,介绍不设导台,视不同情况采用混凝土、砂浆、渣土回填,盾构机掘进通过矿山法开挖段的施工方法。

Though shield tunneling for subway construction has many advantages such as high degree of automation, fast construction progress and minor effects on buildings, yet some sections that shield can not pass through directly, such as hard rock stratum and pile foundation for building and bridges, are generally excavated by mining method and then let shield get through. In this article, based on the tunnel construction of Huangbeiling station to Xinxiu station section in east extending Line 2 of Shenzhen subway, introduces construction method without guide platform, with concrete, mortar, earth and stone backfilled and shield passing through the excavated section with mining method.