Analysis of deformation law of shield tunneling cross old residential buildings in weak strata
The safety of old and shallow foundation residential buildings is relatively low,and shield tunneling through it can have adverse effects.Taking an entrance/exit line of Hangzhou subway as the background,the deformation law of shield tunneling through old residential buildings is analyzed,and the optimal range of excavation parameters for shield tunneling through residential buildings is explored.The results show that the vertical displacement curve of residential buildings is relatively consistent,whether they pass through from the below or from the side first.The deformation before and after the first crossing is relatively small,but when the second crossing occurs,the deformation of residential buildings increases rapidly,mainly manifested as settlement.The burial depth of shield tunneling and grouting parameters have a significant impact on the deformation and inclination of old residential buildings.The surface settlement curve is roughly in a funnel shape.The construction of the exit section has a relatively small impact on surface deformation,while the construction of the entrance section has a relatively large impact on the surface deformation of the exit section and a relatively small impact on the deformation of the upper soil.
NETL
NSTL
万方数据
