考虑到岩体中节理存在的影响，针对具有两组斜交节理的岩体，通过对代表单元的分析，得到了基于一般 Cosserat 介质理论的等效模型，该模型可以退化到岩体具有两组正交节理或一组节理的情形。将上述模型以自编程序实现，对节理岩体沉降进行了数值模拟，同时采用增设节理单元法进行了对比分析，两者具有较好的一致性，最后讨论了两组节理不同斜交角度的影响，计算结果表明等效模型合理有效。

Considering the influence of existence of joints in rockmasses, an equivalent model has been erected based on the general Cosserat continuum theory and the analysis of a representative element. The equivalent model aims at rockmasses with two sets of nonorthogonal joints. Moreover, it also could be used to simulate rockmasses with two sets of orthogonal joints or one set of joint under certain condition. The equivalent model has been coded into a FEM program and the numerical analysis has been carried out to predict settlement of rock foundation ； at the same time, the Goodman ' s joint element method has been applied to solving the same problem. It can be found that the deformation results obtained from above mentioned two methods have a good agreement with each other. Moreover ， two sets of joints with different included angles are discussed with equivalent model, the results show that the proposed equivalent model is reasonable and effective for numerical analysis in jointed rockmasses.