Stability analysis of a cross-sea tunnel structure under seepage and a bidirectional earthquake

doi:10.1061/(ASCE)GM.1943-5622.0000937

IR > 土木工程学院

	Stability analysis of a cross-sea tunnel structure under seepage and a bidirectional earthquake
	Cheng, Xuansheng1 ; Zhang, Xiaoyan 1; Chen, Wenjun 1; Xu, Weiwei 1; Du, Xiuli 2
	2017-09-01
发表期刊	International Journal of Geomechanics
ISSN	15323641
卷号	17 期号:9
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. © 2017 American Society of Civil Engineers.
关键词	Arches Earthquakes Ocean engineering Rock mechanics Rocks Safety factor Seawater effects Seepage Stability Tunnels Uncertainty analysis Bi-directional earthquakes Dynamic finite element Safety coefficient Stability analysis Stability safety factor Strength reduction method Tunnel structures Viscoelastic boundary condition
DOI	10.1061/(ASCE)GM.1943-5622.0000937
收录类别	EI ; SCIE
语种	英语
WOS研究方向	Engineering
WOS类目	Engineering, Geological
WOS记录号	WOS:000417679300019
出版者	American Society of Civil Engineers (ASCE)
EI入藏号	20171903652981
EI主题词	Underwater construction
EI分类号	401.2 Tunnels and Tunneling - 408.2 Structural Members and Shapes - 471.4 Seawater, Tides and Waves - 472 Ocean Engineering - 483.1 Soils and Soil Mechanics - 484 Seismology - 914.1 Accidents and Accident Prevention - 922.1 Probability Theory
来源库	Compendex
分类代码	401.2 Tunnels and Tunneling - 408.2 Structural Members and Shapes - 471.4 Seawater, Tides and Waves - 472 Ocean Engineering - 483.1 Soils and Soil Mechanics - 484 Seismology - 914.1 Accidents and Accident Prevention - 922.1 Probability Theory
引用统计	被引频次：12[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	https://ir.lut.edu.cn/handle/2XXMBERH/114570
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
第一作者单位	兰州理工大学
通讯作者单位	兰州理工大学
第一作者的第一单位	兰州理工大学
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).