高层建筑建设对邻近轨道隧道安全影响机理研究

Study on Influence Mechanism of High-rise Building Construction on Safety of Adjacent Rail Traffic Tunnel

根据新建高层建筑与邻近既有轨道交通隧道两者之间的空间位置关系,采用有限元分析与监控量测相结合的研究方法,研究了隧道在基坑开挖和高层建筑修建后产生的附加内力和变形。通过监测隧道结构各测点位移在施工过程中变化量和变化速率,将有限元计算结果和实测数据进行对比分析,对隧道运营工作状态作出相应判断。研究结果表明隧道围岩处于稳定状态,结构变形满足限值条件,高层建筑建设对轨道交通正常运营影响较小。

Based on the relationship of space position between the newly built high-rise buildings and the adjacent rail traffic tunnel, this paper studies the additional internal force and deformation produced after the excavation of foundation pit and construction of high-rise building by the study method combining the finite element analysis with the monitoring measurement. This paper compares and analyzes the finite element calculation result and the measured data through the monitoring of the variable quantity and variable velocity of each measure point displacement of tunnel structure in the construction process, and makes the corresponding judgment on the working state of tunnel operation. The study results show that the surrounding rock of tunnel is at the steady state, the structure deformation meets the condition of limit value and the construction of high-rise buildings has little impact on the normal operation of tunnel traffic.