| 双侧壁导坑法施工的大断面隧道的稳定性分析 |
| |
| 引用本文： | 高峰,谭绪凯.双侧壁导坑法施工的大断面隧道的稳定性分析[J].重庆交通学院学报,2010(3). |
| |
| 作者姓名： | 高峰 谭绪凯 |
| |
| 作者单位： | 重庆交通大学土木建筑学院; |
| |
| 基金项目： | 国家自然科学基金资助项目(50678077); 重庆市自然科学基金项目(CSTC,2008BB6066); 重庆市教委科学技术研究项目(KJ090403) |
| |
| 摘 要： | 以沙湾大断面隧道为研究背景,应用ANSYS有限元软件,采用释放荷载法,研究支护封闭的快慢对双侧壁导坑法施工的隧道稳定性的影响。通过对拱顶沉降、边墙中点水平位移、围岩塑形区及初衬应力的分析,得到了支护封闭时间对隧道受力和位移状态的影响,施工中应尽量缩短各开挖面的距离,使支护尽快封闭,有利于隧道稳定。为了进一步改善隧道的受力状态,模拟分析了加固部分围岩后的状态。结果表明加固侧壁导坑临时支护与初衬接触处的围岩能较好的改善隧道的受力条件。在临时钢架支护下端与初衬的接触点附近出现了应力集中现象,受到了很大的拉应力,在设计施工中应引起重视。
|
| 关 键 词： | 大断面隧道 双侧壁导坑法 支护封闭时间 加固围岩 有限元 |
Stability Analysis on Large Section Tunnel with Double-Side-Drift Method |
| |
| GAO Feng,TAN Xu-kai.Stability Analysis on Large Section Tunnel with Double-Side-Drift Method[J].Journal of Chongqing Jiaotong University,2010(3). |
| |
| Authors: | GAO Feng TAN Xu-kai |
| |
| Institution: | GAO Feng,TAN Xu-kai(School of Civil Engineering & Architecture,Chongqing Jiaotong University,Chongqing 400074,China) |
| |
| Abstract: | Taking Shawan Tunnel as background,the influence of tunnel's stability resulting from the time of closing the support in large section tunnel with double-side-drift method is studied by finite element software ANSYS with the load-releasing method.Through analyzing vertical displacement of the vault,horizontal displacement of the middle point of sidewall,plastic zone of surrounding rock and stresses of preliminary lining,the result shows that sealing the primary shoring quickly is favorable to control the st... |
| |
| Keywords: | large section tunnel double-side-drift method the closing support time reinforce surrounding rock finite element |
| 本文献已被 CNKI 等数据库收录！ |
|
