Undrained Stability of Opening in Underground Walls in Anisotropic Clays

被引：3

作者：

Lai, Van Qui ^{[1
,2
]}

Chenari, Reza Jamshidi ^{[3
,4
]}

Banyong, Rungkhun ^{[5
]}

Keawsawasvong, Suraparb ^{[5
]}

机构：

[1] Ho Chi Minh City Univ Technol HCMUT, Fac Civil Engn, 268 Ly Thuong Kiet St,Dist 10, Ho Chi Minh City 700000, Vietnam

[2] Vietnam Natl Univ Ho Chi Minh City VNU HCM, Linh Trung Ward, Ho Chi Minh City 700000, Vietnam

[3] Univ Guilan, Fac Engn, Dept Civil Engn, PO 3756, Rasht, Guilan, Iran

[4] Royal Mil Coll Canada, GeoEngn Ctr Queens RMC, Dept Civil Engn, Kingston, ON K7M 8Y5, Canada

[5] Thammasat Univ, Thammasat Sch Engn, Dept Civil Engn, Pathum Thani 12120, Thailand

来源：

INTERNATIONAL JOURNAL OF GEOMECHANICS | 2023年 / 23卷 / 02期

关键词：

Anisotropy; Lower bound; Stability; Tunnel Launching; Upper bound; BEARING CAPACITY; CIRCULAR TUNNEL; FACE STABILITY; JACKING FORCES; LIMIT ANALYSIS; CRITERION; SOIL;

D O I：

10.1061/IJGNAI.GMENG-7898

中图分类号：

P5 [地质学];

学科分类号：

0709 ; 081803 ;

摘要：

A two-dimensional (2D) finite-element limit analysis (FELA) was performed under plane strain conditions to investigate the undrained stability of tunnel launch with a rigid wall in anisotropic clays. The anisotropic undrained shear (AUS) failure criteria were applied to identify anisotropic soil behaviors. The average bound solutions were employed to compute the stability load factor. Different sensitivity analyses were carried out to determine the effect of cover-depth ratio (C/D), overburden factor (gamma D/s(uTC)), and anisotropic strength ratio (r(e)) on the load factor (N) of the opening in tunnel launching with a rigid wall. The failure patterns that were predicted by certain parameters were explored and investigated. To adopt a practical approach, some new design charts for the undrained stability of tunnel launching with a rigid wall in anisotropic clays were devised.

引用

页数：9

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