CONSTRUCTION MONITORING AND FEEDBACK ANALYSIS OF A DEEP FOUNDATION PIT WITH FROZEN GROUND AND PILE-SUPPORT

Frozen ground made a complex mechanical state of the pile-supported foundation pit of the Runyang Bridge.To assure its stability,a large safety monitoring system was established based on structure characteristics of frozen ground and pile-support deep foundation pit,and the engineering geological condition of site.This paper presents monitoring data including lateral earth pressure,inner support forces,stresses and displacements,and their analysis.A feedback analysis was made based on the monitoring data..The monitor result indicated the ground freezing and pile-support method is viable for deep foundation pit,and the experience was backlog for construction of similar engineering aftertime.