Creep Characteristic of Carbonaceous Slate and Its Constitutive Model Under Triaxial Compression

doi:10.12068/j.issn.1005-3026.2017.04.027

Journal of Northeastern University Natural Science ›› 2017, Vol. 38 ›› Issue (4): 586-590.DOI: 10.12068/j.issn.1005-3026.2017.04.027

• Resources & Civil Engineering • Previous Articles Next Articles

Creep Characteristic of Carbonaceous Slate and Its Constitutive Model Under Triaxial Compression

WANG Yong-gang^1,2,3， DING Wen-qi^1,2， WANG Zhe-chao⁴， ZONG Zhi⁴

1. College of Civil Engineering， Tongji University， Shanghai 200092， China; 2. Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education， Tongji University， Shanghai 200092， China; 3. Gansu Province Transportation Planning， Survey & Design Institute Co. Ltd.， Lanzhou 730030， China; 4. Geotechnical and Structural Engineering Research Center， Shandong University， Jinan 250061， China.

Received:2015-12-10 Revised:2015-12-10 Online:2017-04-15 Published:2017-04-11
Contact: WANG Zhe-chao
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Abstract

Abstract: Triaxial compression creep tests were performed on carbonaceous slate samples obtained from Muzhailing tunnel of Lanzhou-Chongqing railway in order to understand the creep characteristics of carbonaceous slate with different angle between bedding planes and axial load. Based on the test results， a creep model was proposed to describe the transversely isotropic creep behavior of the carbonaceous slate， which needs more parameters in the creep potential function to describe the transversely isotropic creep behavior than in the conventional potential function. A method for the determination of creep parameters was developed using back analysis， which is helpful in reducing the number of creep tests needed to determine the creep parameters and is applicable in practice. This study contributes to the understanding of the transversely isotropic behavior of rocks and to the design of the lining system in the transversely isotropic stratum.

Key words: carbonaceous slate, transverse isotropy, creep behavior, creep model, back analysis, bedding plane

CLC Number:

TU45

WANG Yong-gang， DING Wen-qi， WANG Zhe-chao， ZONG Zhi. Creep Characteristic of Carbonaceous Slate and Its Constitutive Model Under Triaxial Compression[J]. Journal of Northeastern University Natural Science, 2017, 38(4): 586-590.

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Creep Characteristic of Carbonaceous Slate and Its Constitutive Model Under Triaxial Compression

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