邻近电缆隧道的高架桥变形分析

Deformation Analysis of Viaduct Bridge Adjacent to Cable Tunnel

南京市某220 kV电缆线路采用顶管、盾构和明挖等多种工法施工,其中K3～K4盾构段与某高架桥存在平行和交叉的关系。其中,隧道外边界距高架桩基最近1.34 m。本文采用数值模拟方法计算了桩基和桥梁的位移,分析了其变形规律,并提出了控制措施。

Pipe jacking, shield tunnel and open excavation are adopted in a 220 kV cable line in Nanjing, among which the shied tunnel namely K3～ K4 section run parallel to or across a viaduct bridge. Space between the boundaries of shield tunnel and piles is as narrow as 1.34 meters. The paper adopts numerical modeling to calculate the displacement of the viaduct bridge as well as its piles. Also, the deformation rule is analyzed and control measures are given.