Time-Dependent Behavior of Cataclastic Rocks in a Multi-Loading Triaxial Creep Test

2016 ◽  
Vol 49 (9) ◽  
pp. 3793-3803 ◽  
Author(s):  
Yu Zhang ◽  
Jianfu Shao ◽  
Weiya Xu ◽  
Yun Jia
Keyword(s):  
Creep Test ◽  
Time Dependent ◽  
Dependent Behavior ◽  
Triaxial Creep ◽  
Triaxial Creep Test

scholarly journals A case study on severe damage at a tunnel in serpentinite rock mass

2021 ◽  
Vol 4 (1) ◽  
Author(s):  
Y. Fujii ◽  
N. Ikeda ◽  
Y. Onoe ◽  
Y. Kanai ◽  
T. Hayakawa ◽  
...  
Keyword(s):  
Rock Mass ◽  
Creep Test ◽  
Triaxial Compression ◽  
Friction Angle ◽  
Primary Creep ◽  
Time Dependent ◽  
Severe Damage ◽  
Floor Heave ◽  
Triaxial Creep ◽  
Triaxial Creep Test

Abstract Face squeezing, floor heave, and buckling of invert were found after a 10-day holiday in 2014 around the serpentinite face of a tunnel in Hokkaido, Japan. The damage continued for over 2 months, extending 400 m toward the entrance causing a massive roof fall. The tunnel was excavated again with a circular section and extra-thick shotcrete, and the face had crossed the damaged part 6 years after the damage occurred. Uniaxial and triaxial compression tests were carried out to obtain the mechanical properties of the serpentinite to clarify the severe damage mechanism at the tunnel. The main experimental findings are as follows. The uniaxial compressive strength of the serpentinite samples was very low, and the ratio of the strength to the estimated overburden pressure was extremely low. The parameter n indicated that the time-dependent deformation of the serpentinite was not large but the same as ordinary rocks. All specimens showed strain-hardening in the triaxial compression test, and the friction angle was very low by the brucite content. Only primary creep was observed in the multistage triaxial creep test. The pressure on the shotcrete from rock mass for the damaged tunnel was enough to cause creep deformation and failure of shotcrete. From the above findings, designing the concrete lining that can support the earth and water pressure is recommended for tunnel excavation in such a weak serpentinite rock mass, particularly with a very low friction angle by brucite. Highlights Face squeezing, floor heave, and buckling of invert were found after a 10-day holiday around the serpentinite face in Hokkaido, Japan. The time-dependent deformation of the serpentinite was not large but the same as ordinary rocks. All specimens showed strain-hardening in the triaxial compression test, and the friction angle was very low by the brucite content. Only primary creep was observed in the multistage triaxial creep test. The severe damage to the tunnel was not a brittle creep failure of the serpentinite rock mass itself but the shotcrete lining.

In situ triaxial creep test for investigating deformational properties of gravelly sliding zone soil: example of the Huangtupo 1# landslide, China

Landslides ◽  
2018 ◽  
Vol 15 (12) ◽  
pp. 2499-2508 ◽  
Author(s):  
Qinwen Tan ◽  
Huiming Tang ◽  
Lei Fan ◽  
Chengren Xiong ◽  
Zhiqiang Fan ◽  
...  
Keyword(s):  
Creep Test ◽  
Triaxial Creep ◽  
Triaxial Creep Test ◽  
Sliding Zone

A Creep-Damage Constitutive Model for Sandstone

2012 ◽  
Vol 170-173 ◽  
pp. 289-294 ◽  
Author(s):  
Wei Wang ◽  
Jun Lv ◽  
Hai Cheng Wang
Keyword(s):  
Constitutive Model ◽  
Creep Test ◽  
Creep Damage ◽  
Creep Model ◽  
Whole Process ◽  
Proposed Model ◽  
Accelerated Creep ◽  
Damage Constitutive Model ◽  
Triaxial Creep ◽  
Triaxial Creep Test

Based on the results obtained by the triaxial creep test, a creep-damage constitutive model for sandstone is presented by using the damage theory and by introducing the concept of “the whole process of damage” into Burgers creep model. The parameters of the model are determined by fitting the creep test data. The result shows that the proposed model can not only describe efficiently the variation of decay and steady creep under relatively low stress condition, but also give a satisfied representation of damage behavior in accelerated creep stage.

Study on Triaxial Creep Test and Constitutive Model of Compacted Red Clay

2020 ◽  
Author(s):  
Zhilin Long ◽  
Yuzhu Cheng ◽  
Guoyue Yang ◽  
Dong Yang ◽  
Yunlong Xu
Keyword(s):  
Constitutive Model ◽  
Creep Test ◽  
Red Clay ◽  
Triaxial Creep ◽  
Triaxial Creep Test
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