Title :

Experimental and numerical investigations on hydro-mechanical properties of saturated fine-grained sandstone

Author(s) :

Wang, Susheng [Auteur]
Xu, Weiya [Auteur]
Hohai University
Laboratoire de Mécanique, Multiphysique, Multiéchelle - UMR 9013 [LaMcube]
Wang, Wei [Auteur]
Hohai University
Laboratoire de Mécanique, Multiphysique, Multiéchelle - UMR 9013 [LaMcube]

Journal title :

International Journal of Rock Mechanics and Mining Sciences

Volume number :

127

Pages :

104222

Publisher :

Pergamon and Elsevier

Publication date :

2020-03

ISSN :

1365-1609

English keyword(s) :

Fine-grained sandstone
Triaxial compression test
Hydro-mechanical properties
Coupled elastoplastic damage model

HAL domain(s) :

Sciences de l'ingénieur [physics]

English abstract : [en]

In order to investigate hydro-mechanical properties of fine-grained sandstone in Xiangjiaba hydropower station in China, a series of triaxial compression tests of saturated fine-grained sandstone were conducted. Two groups ...
Show more >In order to investigate hydro-mechanical properties of fine-grained sandstone in Xiangjiaba hydropower station in China, a series of triaxial compression tests of saturated fine-grained sandstone were conducted. Two groups of hydro-mechanical triaxial compression tests of saturated sandstone are conducted: firstly, confining pressure is constant at 10 MPa while pore pressure is varied from 4, 6, and 8 MPa; secondly, pore pressure is constant at 6 MPa while confining pressure is varied from 10, 15, and 20 MPa. The effects of the confining and pore pressures on strength and deformation behaviors of saturated fine-grained sandstone are discussed. Based on the test results, a novel coupled elastoplastic damage model is proposed to considering hydro-mechanical coupling properties of saturated fine-grained sandstone using the effective stress concept. Furthermore, the numerical formulations of a return mapping algorithm for the coupled model implementation are introduced in detail. Finally, the validity and efficiency of the model are compared between numerical simulation and test results. Therefore, the coupled model is effectively applied in the stability analysis of practical engineering.Show less >

Language :

Anglais

Peer reviewed article :

Oui

Audience :

Internationale

Popular science :

Non

Collections :

• Laboratoire de Mécanique, Multi-physique, Multi-échelle (LaMcube) - UMR 9013

Submission date :

2021-12-08T09:52:37Z
2025-04-01T10:45:11Z