TEMPERATURE EFFECTS ON MECHANICAL PROPERTIES OF THE BEISHAN GRANITE

摘要：

The Beishan area, a Gobi desert in Gansu province, is considered as a suitable candidate for HLW geological repository in China. In this study, a series of uniaxial compression and constant load tests have been conducted on deep intact granite of Beishan under different stress levels and temperatures. The results indicate that the peak stress, crack damage stress and elastic modulus decrease, while the Poissons ratio increases as the temperature increases. At the same constant load, the peak axial strain, peak lateral strain, minimum volumetric strain and time to failure decrease as the temperature increases. The time to failure increases rapidly as the constant load decreases. The major failure mode under uniaxial compression condition is axial splitting with shear zone and it is brittle. Increasing temperature beyond 90 ℃, cracks coalesce much more easily to form a shear zone.

作者: Y.M.Liu J.Wang L.G.Tham Q.X.Lin F.Xiao C.F.Lee

作者单位: University of Science and Technology Beijing, Beijing 100083, P.R.China Beijing Research Institute o Beijing Research Institute of Uranium Geology, Beijing 100029, P.R.China Department of Civil Engineering, The University of Hong Kong, Hong Kong, P.R.China

会议类型: 国际会议

会议名称: 第二届国际应力-水流-热-化学耦合学术大会(2nd International Conference on Coupled Thermo-Hydro-Mechanical Processes in Geosystems and Engineering：Geoproc2006)

会议地点: 南京

会议语种:英文

页码: 243-247

在线出版日期: 2006-05-22（万方平台首次上网日期，不代表论文的发表时间）