Study on Creep Characteristics and Constitutive Model for Thalam Rock Mass with Fracture in Tunnel
- 209 Downloads
In the each loading stage, strain and creep strain occurs instantaneously on the axial and lateral of fractured. Instantaneous strain leads to the 80% overall specimen deformation. The axial strain is about 2–3 times larger than the lateral strain. Instantaneous strain completed time and deformations under each loading stage decrease when the loading time increases. With the increasing of loading, axial strain and lateral strain of fractured phyllite present the approximate linear curve growth change. With increasing of axial stress, the relationship between the lateral strain and axial strain transform from the linear increased trend to the index increased trend. With the increasing of moisture content, the axial deformation and lateral deformation of fractured phyllite increase. The curves of axial strain and lateral strain under soaked for 10 and 15 days condition are similar. The modified Burgers model can describe each creep stage of fractured phyllite which have high fitting precision, less fluctuation and high reliability. Therefore, modified Burgers model can provide an effective way to analyze the creep characteristics of fractured phyllite.
KeywordsFractured phyllite Creep Modified Burgers model Experiment
- Andrade ENC (1910) On the viscous flow in metals, and allied phenomena. Proc R Soc Lond. Ser A, Contain Pap Math Phys Charac 1–12Google Scholar
- Lu Z, Yao HL, Liu J et al (2015) Study on the rheological properties of the surrounding rock of a deep buried phyllite tunnel. In: 49th US rock mechanics/geomechanics symposium. American Rock Mechanics AssociationGoogle Scholar
- Yuan H, Cao P, Xu W et al (2006) Visco-elastop-lastic constitutive relationship of rock and modified Burgers creep model. Chin J Geotech Eng 28(6):796–799Google Scholar
- Zaman MM, Abdulraheem A, Roegiers JC (1995) Reservior compaction and surface subsidence in the North Sea area. J Geol 5:373–379Google Scholar