深部岩体水热弱化修正及其因素确定方法

深部岩体单轴抗压强度受到水和地温的影响,目前采用岩石的软化系数来表征水热弱化作用,但软化系数为一定值;为了反映含水率和温度变化对岩体强度的动态影响,定义了两个新的变量,水弱化系数和热弱化系数;并通过试验方法和相似系数方法来确定新的变量。结果表明,定义的变量随含水率和温度的变化而变化,能够反映了深部岩体水热弱化损伤的本质,得到的结果可为工程实践提供指导。

Water and Heat Damage of Deep Rock Mass and the Determination of Its Influencing Factors

The uniaxial strength of deep rock mass would be affected by water and heat; their damage effect is at present mainly described by the softening coefficient as a constant In this paper, in order to show the dynamic effect of moisture content and temperature on the strength of rock mass, two new variables are proposed: the water damage coefficient and the heat damage coefficient; they can be determined by test and the similarity coefficient method. The results show that the new coefficients vary with the moisture content and temperature, and can reflect the behavior of deep rock mass subjected to the water and heat damage.