近距离加载对盾构隧道的影响分析

Analysis on the impact of short distance load adding upon shield tunnel

采用有限元法对浅基础与桩基础的建筑加载对近距离既有盾构隧道位移影响进行了分析,得到浅基础与桩基础上部加载对地铁隧道的影响特点,结果表明:浅基础与桩基础在加载作用下,随着加载位置与隧道的水平投影距离的增加,竖向位移减小的幅度比水平位移明显要大;桩基础上部加载对地铁隧道的影响要远小于浅基础对地铁隧道的影响。

The paper analyzes the impact of shallow foundation and pile foundation building load adding upon short distance existing shield tunnel displacement by applying finite element method, and finds out the impacting features of shallow foundation and pile foundation upper load adding upon subway tunnel. Results show that with the increasing of load adding location and horizontal tunnel distance, the vertical displacement will be larger than the horizontal displacement, the impact of pile foundation upper load adding upon the subway tunnel will be smaller than the shallow foundation upon the subway tunnel.