摘要
基于某高速公路隧道穿越岩堆体的工程实践,建立了岩堆体隧道采用三台阶七步工法的三维数值计算模型,分析不同开挖进尺下岩堆体隧道围岩塑性区、拱顶下沉以及围岩水平位移的变化规律。结果表明:合理的开挖进尺能明显改善围岩受力,控制周边围岩位移。进行岩堆体隧道开挖时,建议采用短进尺,开挖进尺控制在1m左右。所得结论可为岩堆体隧道施工提供有益参考。
Based on the engineering practice of a talus tunnel at a highway,3D finite element models of the talus tunnel which using three-stages and seven-steps method in the construction is established.The influence of different circulating footage on vault settlement,the squeezing of tunnel working face,and the plastic area in surrounding rock is analyzed. The results show that the proper circulating footage can obviously improve the mechanical state of surrounding rock and limit displacement of surrounding rock. Short circulating footage and the footage controlled at about 1m in the construction of talus tunnel are recommended. The conclusions provide a useful reference for talus tunnel construction.
出处
《低温建筑技术》
2015年第10期101-104,共4页
Low Temperature Architecture Technology
基金
云南省交通运输厅科技计划项目(kkk0201406045)
关键词
岩堆体隧道
三台阶七步法
开挖进尺
数值模拟
talus tunnel
three-stages and seven-steps method
circulating footage
numerical simulation
作者简介
刘新峰（1989-），男，湖南郴州人，硕士研究生，研究方向：道路与铁道工程。
