Stability Analysis of a Cross-Sea Tunnel Structure under Seepage and a Bidirectional Earthquake | |
Cheng, Xuansheng1; Zhang, Xiaoyan1; Chen, Wenjun1; Xu, Weiwei1; Du, Xiuli2 | |
刊名 | INTERNATIONAL JOURNAL OF GEOMECHANICS |
2017-09 | |
卷号 | 17期号:9 |
关键词 | Ocean engineering Tunnel Bidirectional earthquake Seepage Strength-reduction method Stability analysis |
ISSN号 | 1532-3641 |
DOI | 10.1061/(ASCE)GM.1943-5622.0000937 |
英文摘要 | The rock mass surrounding a subsea tunnel often contains seawater, and the coupled effects of an earthquake and seepage introduce more uncertainty into analyses of tunnel safety. However, research on this topic is still lacking. In the present study, models of structure and fluid fields were established by considering the effect of a two-dimensional viscoelastic boundary condition, and the stability of a cross-sea tunnel structure under seepage and a bidirectional earthquake was studied. Using a static strength-reduction method on the basis of dynamic finite elements, a stability-safety coefficient was obtained. In addition, the influences of sea depth, overlying rock thickness, and permeability coefficient on the seismic dynamic stability-safety coefficient and varying characteristics of the plastic zone in a cross-sea tunnel structure under seepage and a bidirectional earthquake were studied through numerical examples. The results showed that under this type of earthquake, plastic zones first appeared on both sides of the tunnel arch feet and in the peripheral areas of the arch shoulders; by contrast, the vault was secure, and no plastic zone appeared in this area. When all factors were considered, the plastic zones extended farther when the overlying rock thickness and sea depth were greater. When the overlying rock was thick and the rock mass surrounding the tunnel was only slightly weathered, the rock mass was close to intact, and as a consequence, the permeability coefficient did not significantly affect the development of the plastic zone or the stability-safety factor. The influences of these three parameters on the safety of a subsea tunnel, as obtained in this paper, can provide a theoretical basis for the reasonable design of submarine tunnels. (C) 2017 American Society of Civil Engineers. |
资助项目 | Education Ministry Doctoral Tutor Foundation of China[20136201110003] |
WOS研究方向 | Engineering |
语种 | 英语 |
出版者 | ASCE-AMER SOC CIVIL ENGINEERS |
WOS记录号 | WOS:000417679300019 |
状态 | 已发表 |
内容类型 | 期刊论文 |
源URL | [http://119.78.100.223/handle/2XXMBERH/33127] |
专题 | 土木工程学院 |
通讯作者 | Cheng, Xuansheng |
作者单位 | 1.Lanzhou Univ Technol, Sch Civil Engn, Lanzhou Shi 730000, Gansu Sheng, Peoples R China 2.Beijing Univ Technol, Key Lab Urban Secur & Disaster Engn Educ, Beijing 100124, Peoples R China |
推荐引用方式 GB/T 7714 | Cheng, Xuansheng,Zhang, Xiaoyan,Chen, Wenjun,et al. Stability Analysis of a Cross-Sea Tunnel Structure under Seepage and a Bidirectional Earthquake[J]. INTERNATIONAL JOURNAL OF GEOMECHANICS,2017,17(9). |
APA | Cheng, Xuansheng,Zhang, Xiaoyan,Chen, Wenjun,Xu, Weiwei,&Du, Xiuli.(2017).Stability Analysis of a Cross-Sea Tunnel Structure under Seepage and a Bidirectional Earthquake.INTERNATIONAL JOURNAL OF GEOMECHANICS,17(9). |
MLA | Cheng, Xuansheng,et al."Stability Analysis of a Cross-Sea Tunnel Structure under Seepage and a Bidirectional Earthquake".INTERNATIONAL JOURNAL OF GEOMECHANICS 17.9(2017). |
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