盖挖逆作地铁车站十字型钢柱高精度预埋施工关键技术

Key Technology of Cruciform Steel Column High Precision Pre-Embedding Construction in Covered Top-Down Excavation Method Metro Station

结合深圳地铁车公庙枢纽站盖挖逆作法施工实例,采取工厂精准加工方式,采用后插法及短边矫正长边原理,通过先进的角度传感器法对十字型钢柱垂直度进行检测,从而确保了十字型钢柱高精度定位,有代表性地反映了盖挖逆做法的关键技术。

Based on the example of the construction method of the top-down cover excavation in the Chegong temple Junction station of Shenzhen Metro, this paper adopts the factory precision machining method, using the post-interpolation method and the short-edge correction principle of the long side, detects the vertical angle of the cross steel column by the advanced angle sensor method, then ensuring the high-precision positioning of the cross-shaped steel column, and typically reflected the key technology of covered top-down excavation method.