Abstract:
Xiamen Airport Road tunneling engineering passes through a large number of buildings with shallow-buried large-section tunnel in complex geology strata,and may cause great risks.In order to guarantee the safety of existing buildings,the management program for the control of environment risk induced by tunnel construction is put forward which aims at process control and process restoration.The deformation distributing principle is the core of this program,which is successfully used in the tunnel construction of passing through 104
# and 105
# buildings which are reserved as structures for experiment.According to this management program,analyze method for carrying capacity and breakage types of structure are discussed,and control standards for the existing structures are made.Deformation of stratum and structure induced by the construction of tunnel is forecasted by numerical simulation.The method of surface grouting and grouting from tunnel is put forward for the control of large deformation of ground rock,and the engineering measures are supplied for the effective protect of structure.Field measurement datum indicate that,after taking the corresponding engineering measures,the maximum settlements of buildings have been reduced by 30%~40%.