Large-scale field tunnel model experience and time-dependent floor heave induced by humidification
文献类型：期刊论文
| 作者 | Chang, Zhou4; Yan, Changgen4; Xie, Wanye4; Lu, Zhifang3; Lan, Hengxing1,2; Mei, Haopeng4 |
| 刊名 | TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
 |
| 出版日期 | 2024-03-01 |
| 卷号 | 145页码:18 |
| ISSN号 | 0886-7798 |
| 关键词 | Loess tunnel Field model test Humidification Floor heave Time -dependency model |
| DOI | 10.1016/j.tust.2024.105615 |
| 通讯作者 | Yan, Changgen(yanchanggen@163.com) |
| 英文摘要 | Humidity diffusion can stimulate soil deformation. However, evidence for triggering water-induced excessive floor deformation in underground structures remains elusive. This study investigated the issue by solving a case of a loess tunnel affected by floor heave. First, the study tracked the development of field damage during tunnel operation and examined the potential influence of base moistening on inverted arch uplift. Subsequently, a largescale field tunnel model test was conducted to analyze the moisture distribution, stress, and deformation development at the tunnel base during the humidification process. Finally, the mechanical properties of the base loess at the humidification stages were tested to assess the degradation caused by moistening. Results showed that the moisture distribution at the tunnel base changes from W- to U-shaped during long-term humidification. Moreover, after base humidification, the soil pressure at the arch foot initially decreases sharply and then increases, while the soil pressure at the inverted arch continues to increase. Furthermore, the lining at the arch foot shows an increase in compressive stress, while the inverted arch shows an increase in tensile stress. The differential settlement between the arch foot and inverted arch widens, transitioning to uplift deformation of the inverted arch and ultimately causing floor heave. Laboratory tests showed that the floor heave is primarily caused by the deterioration of the mechanical properties of the loess resulting from humidity diffusion in the tunnel foundation. A time-dependent floor heave model was established by combining the water content, shear strength, compressive strength, and compressibility of the tunnel-base loess, and its feasibility was verified. The model exhibited a sequential decrease in the influence of the internal friction angle, compressive strength, cohesion, and compression coefficient on the floor heave. The findings of this study are considerably important with respect to uncovering the mechanism of floor heave during the operation of loess tunnels and advancing the prediction of damage. |
| WOS关键词 | ROCK ; MECHANISMS |
| 资助项目 | National Natural Sci- ence Foundation of China[42077265] ; National Natural Sci- ence Foundation of China[41927806] ; Gansu Science and Technology Department of Key Projects[21YF5FA002] ; Science and Technology Project of Gansu Provincial Department of Transportation, China[2023- 12] |
| WOS研究方向 | Construction & Building Technology ; Engineering |
| 语种 | 英语 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| WOS记录号 | WOS:001169173900001 |
| 资助机构 | National Natural Sci- ence Foundation of China ; Gansu Science and Technology Department of Key Projects ; Science and Technology Project of Gansu Provincial Department of Transportation, China |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/203079]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Yan, Changgen |
| 作者单位 | 1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, State Key Lab Resources & Environm Informat Syst, Beijing 100101, Peoples R China 2.Changan Univ, Sch Geol Engn & Geomatics, Xian 710064, Shaanxi, Peoples R China 3.Gansu Luqiao Highway Investment Co Ltd, Lanzhou 730030, Gansu, Peoples R China 4.Changan Univ, Sch Highway, Xian 710064, Shaanxi, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chang, Zhou,Yan, Changgen,Xie, Wanye,et al. Large-scale field tunnel model experience and time-dependent floor heave induced by humidification[J]. TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY,2024,145:18. |
| APA | Chang, Zhou,Yan, Changgen,Xie, Wanye,Lu, Zhifang,Lan, Hengxing,&Mei, Haopeng.(2024).Large-scale field tunnel model experience and time-dependent floor heave induced by humidification.TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY,145,18. |
| MLA | Chang, Zhou,et al."Large-scale field tunnel model experience and time-dependent floor heave induced by humidification".TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY 145(2024):18. |
入库方式： OAI收割
来源：地理科学与资源研究所
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