Design and construction monitoring and deformation analysis of super-large deep foundation pit

摘要

Using the large and deep foundation pit of Metro Line 1 of Jinan west railway station as an example,this paper elaborated the design scheme of its retaining structure,formulated a monitoring scheme for foundation pit.In addition,through the real-time on-scene monitoring of horizontal displacement of pile top and pile body,and the monitoring data,we found the law of displacement of deep foundation pit supporting structure.The maximum horizontal displacement of pile body moves down gradually with the advancement of excavation support and the main construction.The maximum displacement occurs around 0.684H.This study has implications for similar engineering geological conditions of foundation pit supporting structure.