Numerical Simulation Of Ground And Segment Displacement In Hangzhou Tunnel

In the 21 st century,major cities in China have built subway tunnels.The emergence of the subway has changed the way people travel and eased the pressure on urban ground transportation.When the shield method is applied,it will cause damage to the surrounding soil structure,which may result in uneven settlement of the ground and affect the existing building structure underground.Research on the displacement changes caused by shield construction can predict the ground deformation and the displacement of the tunnel during the construction process,which can effectively iMParove the control of the surrounding environment and increase the construction safety.A way of numerical simulation,combined with some actual data,is used to analyze the construction of the shield tunnel in Zhengpulu and Zhongyiyaodaxue station of Hangzhou metro line 6 in this paper.The related laws of land subsidence and segment displacement in this section can be obtained through the research,which can be used to guide similar construction.At the same time,according to the construction conditions of the section,the influence of the two factors include the formation properties and the relative position of the tunnel on the settlement law of the shield is discussed.The horizontal settlement curve of the ground surface is grooved,and the maximum simulation value of surface subsidence is basically consistent with the measured value.The shield excavation has an effect on the displacement of the soil before and after 30 metres.When the shield passes through different strata,the settlement in the clay is larger than that in the silt.The ground settlement gradually decreases when the tunnel gradually changes from downhill to uphill.The maximum settlement of the tunnel increases with the decrease of the axial distance,and it gradually shifts to the left,the whole tunnel moves downward to the left.The deformation of the ground gradually decreases with the increase of the angle of the tunnel,and the extent of decrease is getting larger.