Abstract:

The regularity of the settlement of neighboring pipelines induced by the construction of Metro stations by PBA method is analyzed on basic of the monitoring data of the settlement of the ground surface and pipeline during the construction of Huangzhuang Station on line 10 of Beijing Metro. The settlement of the ground surface and pipelines induced by the construction of the Metro station by PBA method can be divided into 3 stages, i.e., the initial slowdeveloping stage, the rapiddeveloping stage when the tunnel face is passing the monitoring points and the stable stage when the tunnel face has passed the monitoring points. The differential settlement between the pipelines and the ground increases rapidly when excavation is carried out below the pipelines and the differential settlement becomes stable after the tunnel face has passed the monitoring points.

Key words: Metro station, PBA method, underground pipeline, settlement