Affiliation:
1. Chinese Academy of Sciences
2. The Chinese Academy of Sciences
Abstract
The mechanical properties of rock under high temperature and high geostress are the
basic and important information to assess the safety of underground engineering. Based on the
environmental conditions of the west route of south-to-north water transfer project in western
China, experiments are conducted for a sandstone. The experiments are conducted in stress path of
hydrostate, pure shear, and conventional triaxial compression at the temperature of 25°C, 50°C and
70°C. The change of strength and average moduli of the rock with temperatures are studied. By
cycle loading and unloading tests, elastic and plastic deformation of the rock are decomposed, it is
shown that the plastic deformations of the rock are clearly changed with temperature, while the
elastic deformation of the rock seems to be unaffected by the temperature. Moreover, based on the
associated plastic flow rule, a constitutive law considering temperature is proposed for the
sandstone.
Publisher
Trans Tech Publications, Ltd.
Subject
Mechanical Engineering,Mechanics of Materials,General Materials Science
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