摘要
对成都市某暗挖电力隧道穿越邻近桥梁桩基问题建立二维有限元模型,分析了隧道开挖在不同的隧道埋深、隧道与桩基中心距下对邻近桥梁桩基的影响规律。分析结果表明:在桩隧中心距小于一定范围时,开挖对桩基的影响很大;桩身最大水平变形和最大弯矩的位置随着隧道埋深变化而变化,且当隧道埋深位于桩中上部时,桩身最大水平变形和最大弯矩相对较大。
Aiming at the problems of a bored power tunnel crossing the adjacent bridge pile foundation,a two-dimensional FEM model is built to analyze the influence rule of tunneling on the pile foundation of the adjacent bridge under the conditions of the different tunnel depths and the central distances of tunnel and pile foundation.The results show that the excavation will have the great effect on the pile foundation when the center distance of tunnel and pile is less than a certain range.The locations of the maximum horizontal deformation and the maximum bending moment of the pile will change with the depth variation of tunnel.While the depth of tunnel is at the upper part of pile,the maximum horizontal deformation and the maximum bending moment of pile will be relatively larger.
出处
《城市道桥与防洪》
2013年第7期119-121,12-13,共3页
Urban Roads Bridges & Flood Control
关键词
暗挖隧道
邻近既有桥桩
穿越
隧道埋深
桩隧中心距
bored tunnel,adjacent existing bridge pile,cross,depth of tunnel,center distance of tunnel and pile
