新建工程对既有下穿隧道影响的有限元模拟分析

基于连续介质学原理，采用三维Ansys有限元软件，考虑建筑物一土体隧道共同作用，模拟在既有下穿双洞隧道上新建高速公路加油站的施工工况，研究新建建筑物引起隧道的变形及荷载．正确评估既有结构的力学状态，提出辅助性措施，以确保新建和既有建筑的结构安全。该研究对同类建筑物的施工设计具有参考意义。

Finite Element Analysis of New Engineering Impact on Existing Tunnel Below

Based on the continuous medium theory, using three-dimensional finite element software Ansys, considering building-soil tunnel interaction to simulate construction conditions of highway gas station on the existing double-track undercrossing tunnels beneath, this paper researches the load and deformation of new buildings on tunnels below, assesses the mechanical state of existing structures, and proposes complementary measures to ensure the structure safety of new and existing buildings. It will provide reference for design of similar construction.