Disturbance Analysis of Deep Buried Subway Tunnel on Adjacent Bridge Pile Foundation
In order to explore the influence of deep-buried subway tunnel construction period and operation period on adjacent bridge pile foundation,a three-dimensional finite element shield crossing construction model and subway vibration analysis model are established based on a shield tunnel section crossing node of Shenzhen subway.The distribution law of pile foundation deformation and bending moment induced by shield crossing during construction period is summarized.The suppression effect of"expanding platform and increasing pile"reinforcement on crossing disturbance is analyzed.The influence of subway vibration on pile foundation deformation during operation and maintenance period is discussed.The results show that the reinforcement of"expanding platform and increasing pile"can reduce the settlement of pile top and the maximum lateral displacement when the tunnel passes through the bridge pile foundation,and the inhibition effect on the maximum lateral displacement is more obvious in the composite stratum.During the operation period,the subway vibration load has little effect on the lateral displacement of the adjacent pile foundation.
subway tunnelbridge pile foundationdisturbance analysissubway vibrationdeformation of pile foundation
NETL
NSTL
万方数据
