通道双向开洞技术在暗挖车站施工中的应用

Application of Channel Bidirectional Opening Technology in Hidden-digging Station

洞桩法暗挖车站工序较多,工期较长,通过在车站中部设置特定尺寸的五层通道,在保证通道初期支护变形稳定的前提下,采用每层导洞分段、相向开挖,并逐层在通道内开挖车站主体导洞,达到提高施工进度的目的。

The hole pile method of hidden-digging station is characterized by large number of procedures, and long period. By arranging five layer channel of a specific size in the middle of the station to ensure the passage of the initial support deformation and stability, bidirectional excavation of the pilot section under the premise of each layer, and excavation of main tunnel layer by layer in the channel are adopted to improve the construction progress.