悬索桥隧道式锚碇系统力学行为研究  

STUDY ON MECHANICAL BEHAVIOUR OF TUNNEL ANCHORAGE SYSTEM FOR SUSPENSION BRIDGE

作　　者：汪海滨[1] 高波[1] 孙振[1] 

机构地区：[1]西南交通大学土木工程学院,四川成都610031

出　　处：《岩石力学与工程学报》2005年第15期2728-2735,共8页Chinese Journal of Rock Mechanics and Engineering

基　　金：西藏交通厅资助项目(200309);西南交通大学博士创新基金(081406)

摘　　要：根据悬索桥隧道式锚碇系统数值模拟结果,通过现场原位相似模型试验进行验证,研究了锚碇系统的力学行为特征、变形机制及稳定状态。结果表明,在主缆张拉和运营阶段,围岩对锚碇的夹持作用是以锚碇前底板为支点来抵抗锚碇体后部向上转动和向前滑移。岩锚初始预应力、自由段长度、外部荷载量值控制着锚索及锚碇在锚碇系统中参与的荷载贡献值和作用时机。锚碇体倾角、长度、放大角、接触界面粗糙度及结合程度影响锚碇位移和系统的稳定性。Based on numerical simulation results of tunnel anchorage system for suspension bridge, and through validating by similar model field test, the mechanical behavior characteristics, deformation mechanism and stabilization state of rock mass of anchorage system have been researched. The results show that, in main cable tension and operation stage of anchorage, the rock mass clip-holdup effect is to withstand part of the anchorage from rotating up and sliding forward, with the bottom front as fulcrum. Initial prestress, length of free-segment of anchor cable and the load value determine contribution value and action occasion of the anchor cable and tunnel anchorage. Inclination, length, magnification angle of anchorage, interface roughness concentration and bonding capacity, etc. affect the displacement of anchorage and stability of rock mass.

关 键 词：隧道工程 数值模拟 原位试验:悬索桥 隧道式锚碇 力学行为 

分 类 号：U45[建筑科学—桥梁与隧道工程]