岩土力学2011，Vol.32Issue(6)：1843-1848,6.
公路隧道中系统锚杆的功效研究
Study of efficacy of systematic anchor bolts in highway tunnels
摘要
Abstract
A support structure of systematic anchor bolts is a key part in the system of shotcrete-bolt suppcrts.and it is widely used in preliminary bracing of hiqhway tunnel at present.However, there is no effective quantitative way to calculate the role of the systematic anchor bolts for the stability of tunnel structure.Taking a certain expressway tunnel for example, the influence of anchor bolts on safety factors of tunnels under different geological conditions is calculated with FEM strength reduaion method.Together with FEM numerical simulating and analysis to various kinds of effects from anchor bolts, conclusions can be drawn as follows.The anchor bolts have little influence on stability of expressway tunnel under much more geological conditions: therefore, it is suggested that experimental verification of canceling the systematic anchor bolts should be carried out gradually if possible, so as to provide more engineering basis for canceling anchor bolts in highway tunnels.关键词
隧道/有限元强度折减法/安全系数/系统锚杆Key words
tunnel/ finite element strength reduction/ safety factor/ systematic anchor bolts分类
交通工程引用本文复制引用
陈力华,林志,李星平..公路隧道中系统锚杆的功效研究[J].岩土力学,2011,32(6):1843-1848,6.基金项目
西部交通建设科技项目"公路隧道松弛荷载预测理论与预警系统及设计方法研究"资助(No.2006 318 740 24). （No.2006 318 740 24）
