基于midas-GTS的盾构隧道施工上部电塔稳定性研究

Research on the Stability of the Upper Electrical Tower in Shield Tunnel Construction Based on midas-GTS

为研究隧道建设过程对临近建筑物产生的影响。文中以琶洲支线隧道为例,运用三维数值分析软件midas-GTS建立足尺三维模型,分析公路隧道施工过程中电塔附近的地层变形和电塔塔基变形,得到施工过程中地层位移规律及电塔塔基的位移规律,进而分析在盾构施工中电塔的稳定性。结果表明,盾构施工对电塔的影响在规范要求内,引起的电塔塔基最大总位移量为16.04 mm;塔身最大位移量为66.25 mm、最大倾斜度为1.27×10-3。

In order to study the influence of tunnel construction on adjacent buildings,taking the Pazhou branch tunnel as an example,the three-dimensional numerical analysis software midas-GTS is used to establish a full-scale three-dimensional model to analyze the ground deformation near the tower and the tower foundation during shield construction.The ground displacement law in the construction process and the displacement law near the tower foundation are obtained,and then the stability of the tower in the shield construction is analyzed.The results show that the impact of shield construction on the electric tower is within the specification requirements,the maximum settlement of the tower foundation caused by the electric tower is 16.04 mm;the maximum displacement of the tower body is 66.25 mm and the maximum inclination is 1.27×10-3.