交叠盾构隧道与相邻建筑物相互影响分析

ANALYSIS OF INTERACTION BETWEEN OVERLAPPING SHIELD TUNNEL AND ADJACENT BUILDINGS

针对交叠隧道与邻近建筑物相互作用机理研究不足的现状,以南昌轨道交通4号线穿越3号线及周边高层建筑物为研究背景,采用有限元分析软件midas GTS NX建立交叠隧道穿越建筑物的三维仿真模型,分别对隧道与邻近建筑物不同间距、隧道埋置不同深度及下穿隧道与既有隧道之间不同覆土厚度工况条件下,邻近建筑物对交叠隧道衬砌受力状态的影响及盾构隧道施工对邻近建筑物的横向倾斜和桩基沉降进行了模拟分析。通过计算分析得出交叠隧道与邻近建筑物相互作用的影响规律,有限元模型对交叠隧道穿越建筑物的模拟仿真是准确有效的,研究结果可以为交叉重叠隧道的设计施工提供借鉴。

Aiming at the current situation of insufficient research on the interaction mechanism between overlapping tunnels and the adjacent building,taking Nanchang Rail Transit Line 4 crossing Line 3 and the adjacent high-rise building as the research background,the three-dimensional simulation model of overlapping tunnels crossing the adjacent building is established by using the finite element analysis software MIDASGTSNX.Under the conditions of different distances between overlapping tunnels and the adjacent building,different depths of tunnel embedding,and different soil cover thickness between the underpass tunnel and the existing tunnel,the influence of the adjacent building on the stress state of overlapping tunnel linings and the lateral inclination of the adjacent building and the pile foundation settlement caused by shield tunnel construction are simulated and analyzed.The influence law of the interaction between overlapping tunnels and the adjacent building is obtained through calculation and analysis,the finite element model is accurate and effective for the simulation of overlapping tunnels passing through the building.The research results can provide reference for the design and construction of overlapping tunnels.