Regarding the feasibility and safety issues of cutting through existing bridge pile foundations in shield tunnels,based on the construction of a certain subway project's interval shield tunnel,theoretical calculation methods are first used to analyze the changes in pile bearing capacity and the influence of pipe segments before and after cutting pile foundations,and a safety factor table is obtained;Then combined with Midas GTS NX finite element software to simulate and analyze the whole process of shield cutting pile foundation,select nodal analysis to analyze the displacement changes of bridge deck and adjacent soil layers.The results show that the safety coefficient of the bridge structure before and after cutting the pile foundation by shield tunneling has a small change,indicating structural safety;During the process of shield tunneling,both the bridge deck and nearby soil layers experienced settlement,and the settlement amount met the require-ments of the specifications.
NETL
NSTL
维普
万方数据
