| 大断面黄土隧道洞口段施工数值模拟分析 |
| Numerical Simulation Analysis of Construction in Portal Section of Large Section Loess Tunnel |
| 投稿时间：2014-03-13 |
| 中文关键词:大断面 黄土隧道 洞口 管棚 变形 受力特性 |
| 英文关键词:large section loess tunnel portal section deformation mechanics characteristic |
| 基金项目:山西省交通运输厅科研项目(2012 1 1) |
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| 中文摘要: |
| 依托平阳高速某黄土公路隧道，采用三维数值模型对隧道洞口段不同施工工法施工过程中围岩变形和支护结构的受力规律进行研究。研究结果表明：(1)各工法下施工阶段最不利状态：台阶法为上台阶施工，CRD法为先行洞上导坑施工，双侧壁导坑法为中上导坑施工，当进行到上述工序时应加强监控量测，开挖后及时施作初期支护。(2)黄土隧道洞口段优先采用双侧壁导坑工法以防止围岩产生过大变形。 |
| 英文摘要: |
| To research the deformation regularity of surrounding rock and the mechanics characteristic of support structure of portal section of large section loess tunnel with different construction methods, 3D Numerical Simulation is applied and the large section loess tunnel of Pingding Yangqu Highway is taken as an example. Comparing deformation and mechanics characteristic in three types of construction method conditions, the research results show that：(l)The most disadvantaged status in the construction stage of construction method is as follow: upper bench construction step in Benching stepping method, method for stair construction, right upper heading construction step in CRD method, middle upper heading construction step in both sides heading method.(2) The both sides heading method should be took precedence in order to prevent large deformation of surrounding rocks. |
| 常立峰,孙志杰.大断面黄土隧道洞口段施工数值模拟分析[J].石家庄铁道大学学报(自然科学版),2015,(2):32-37. |
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