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目前裂隙岩体水力学模型研究主要沿 3个方向发展 :即拟连续介质模型、离散介质模型和双重介质模型。 3种模型各有其特点 ,但均存在计算工作量巨大和难以满足实际工程精度要求等缺陷 ,为避免这类缺陷 ,采用分形理论 ,并根据裂隙发育规模与工程尺度的关系 ,提出了基于岩体与流体相互作用的上述前两种模型的耦合模型。对数目不多的高序次的起主要导水作用的大中型裂隙、断层 ,认为是具体的 ,采用离散介质模型 ;对由这些大中型裂隙、断层切割而成的岩体 ,由于含密集的低序次的小裂隙 ,认为是不确定的 ,对这类岩体采用拟连续介质模型。然后根据两类介质接触处的水头相等及位移连续来建立裂隙岩体的水力学模型。在该模型中首次提出了跨越尺度效应的渗透张量表达式。运用该模型对三峡工程永久船闸 2 0号剖面的高边坡渗流及稳定问题进行分析计算 ,所得结果与实际情况较吻合。
At present, the hydraulic model of fractured rock mass mainly develops in three directions: quasi-continuous medium model, discrete medium model and dual medium model. The three models have their own characteristics, but there are many computational workload and difficult to meet the requirements of the actual engineering and other shortcomings. In order to avoid such defects, the fractal theory and according to the relationship between the scale of fracture development and engineering scale, The Coupling Model of the First Two Models for Body-Fluid Interaction. For a small number of high-order large and medium-sized fissures and faults that play a major role in water diversion, they are considered to be specific and discrete media models are used. For those large and medium-sized fissures and fault-cut rock masses, Low-order fractures are considered as uncertain. For this type of rock mass, a quasi-continuous medium model is used. Then the hydraulic model of the fractured rock mass is established according to the continuity of the head and the displacement of the two types of medium contact. For the first time, the permeability tensor expression across scale effect is proposed in this model. The model is used to analyze and calculate the seepage and stability of the high slope of the permanent ship lock at the TGP. The results are in good agreement with the actual conditions.