Minimum ground pre-freezing time before excavation of Guangzhou subway tunnel
文献类型：期刊论文
| 作者 | Li, Shuangyang; Lai, Yuanming; Zhang, Mingyi; Zhang, Shujuan |
| 刊名 | COLD REGIONS SCIENCE AND TECHNOLOGY
 |
| 出版日期 | 2006-12-01 |
| 卷号 | 46期号:3页码:181-191 |
| 关键词 | artificial ground freezing subway tunnel pre-freezing time surface settlement |
| ISSN号 | 0165-232X |
| DOI | 10.1016/j.coldregions.2006.09.001 |
| 通讯作者 | Lai, Yuanming(ymlai@ns.lzb.ac.cn) |
| 英文摘要 | Artificial Ground Freezing (AGF) has been in use for more than a century. However, there are few published papers concerning about thermal and mechanical calculation and analysis of AGE Especially, in the practical project, when other factors such as freeze temperature, quantity and spacing of freeze pipes, are same, the ground pre-freezing time affects the project cost as well as the strength of frozen wall. So, in this paper, a subway double-line tunnel in Guangzhou constructed by AGF is taken as an example. At first, a numerical model for thermal and mechanical analysis is proposed. Then, based on this model, the surface settlements are calculated and compared by using finite element method (FEM) when the ground pre-freezing time are 60, 50, 40 and 30 days, respectively. According to the criteria of code that the maximum surface settlement is less than 30 mm, a minimum pre-freezing time could be selected. At last, under the condition of this minimum pre-freezing time, the temperature fields, stress fields and displacement fields at every excavation step are calculated and analyzed. The safety of frozen earth wall is also evaluated by applying long-term strength equation of frozen soil. (c) 2006 Elsevier B.V. All rights reserved. |
| 收录类别 | SCI |
| WOS关键词 | 3-DIMENSIONAL NONLINEAR-ANALYSIS ; PERMAFROST REGIONS ; EMBANKMENT |
| WOS研究方向 | Engineering ; Geology |
| WOS类目 | Engineering, Environmental ; Engineering, Civil ; Geosciences, Multidisciplinary |
| 语种 | 英语 |
| WOS记录号 | WOS:000242792600003 |
| 出版者 | ELSEVIER SCIENCE BV |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2555758 |
| 专题 | 寒区旱区环境与工程研究所 |
| 通讯作者 | Lai, Yuanming |
| 作者单位 | Chinese Acad Sci, State Key Lab Frozen Soil Engn, Cold & Arid Reg Environm & Engn Res Inst, Lanzhou 730000, Gansu, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Shuangyang,Lai, Yuanming,Zhang, Mingyi,et al. Minimum ground pre-freezing time before excavation of Guangzhou subway tunnel[J]. COLD REGIONS SCIENCE AND TECHNOLOGY,2006,46(3):181-191. |
| APA | Li, Shuangyang,Lai, Yuanming,Zhang, Mingyi,&Zhang, Shujuan.(2006).Minimum ground pre-freezing time before excavation of Guangzhou subway tunnel.COLD REGIONS SCIENCE AND TECHNOLOGY,46(3),181-191. |
| MLA | Li, Shuangyang,et al."Minimum ground pre-freezing time before excavation of Guangzhou subway tunnel".COLD REGIONS SCIENCE AND TECHNOLOGY 46.3(2006):181-191. |
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来源：寒区旱区环境与工程研究所
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