裂隙岩体蠕变柔量分析

ANALYSIS ON CREEP COMPLIANCE OF CRACKED ROCK

利用Betti互等定理和线性粘弹性断裂力学原理推导了裂隙岩体单轴蠕变柔量和体变蠕变柔量的理论表达式,并通过自洽理论来考虑裂隙相互作用对岩体蠕变柔量的影响,分析了裂隙密度参数和泊松比改变时裂隙岩体蠕变柔量的变化规律,对比了考虑和不考虑裂隙相互作用时裂隙岩体蠕变柔量的区别。同时,分析了在静水应力作用下裂隙岩体蠕变的长期稳定问题。

Using Betti reciprocal theorem and viscoelastic fracture theory, the formulation of creep compliance of cracked rock under uniaxial stress and hydrostatic stress is deduced. Influence of crack interaction on creep compliance of cracked rock is taken into account by using self-consistent theory, and variation principles of creep compliance of cracked rock with increased crack density parameter and Poisson's ratio are analyzed. Difference of creep compliance with and without crack interaction is analyzed, and the creep stability of cracked rock under hydrostatic stress is discussed.