Long-term hydromechanical behaviour of a deep cavity taking into account a simplified sequence of life stages

被引：3

作者：

Sun, Y. ^{[1
]}

Wong, H. ^{[1
]}

Pardoen, B. ^{[1
]}

Deleruyelle, F. ^{[2
]}

Dufour, N. ^{[3
]}

机构：

[1] Univ Lyon, LTDS UMR CNRS 5513, ENTPE, Rue Maurice Audin, F-69120 Vaulx En Velin, France

[2] Inst Radioprotect & Surete Nucleaire IRSN, PSE ENV, SEDRE, UEMIS, F-92260 Fontenay Aux Roses, France

[3] CEREMA DTerMed, Aix En Provence, France

来源：

COMPUTERS AND GEOTECHNICS | 2023年 / 156卷

关键词：

Viscoplasticity; Dilation; Clayey rock; Quasi-analytical; Excavation Damaged Zone; EXCAVATION DAMAGED ZONE; TIME-DEPENDENT BEHAVIOR; MINE CLOSURE BEHAVIOR; STRAIN LOCALIZATION; ANISOTROPIC DAMAGE; TUNNEL; MODEL; CREEP; PROPAGATION; SIMULATION;

D O I：

10.1016/j.compgeo.2023.105256

中图分类号：

TP39 [计算机的应用];

学科分类号：

081203 ; 0835 ;

摘要：

This study first presents an analytical approach for the hydromechanical behaviour of a deep spherical cavity during different stages of its simplified life cycle. The underground cavity is assumed to be excavated in a dilatant poro-viscoplastic rock mass, and viscoplasticity is modelled based on the Perzyna's overstress concept. The dilation is incorporated by assuming that the volumetric viscoplastic strain rate is a linear function of the Fro-benius norm of the deviatoric plastic strain rate. Some numerical examples are performed to examine the applicability of the model. Then, a sensitivity analysis is conducted on the time-dependent development of the Excavation Damaged Zone (EDZ) around an unsupported deep cavity. The von Mises equivalent strain is used as a criterion to assess the time-dependent extension of the damaged area. The conclusions provide some useful guidelines for the engineering design of underground openings.

引用

页数：10

共 50 条

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