节理岩体卸荷等效连续模型研究
首发时间:2007-05-15
摘要:通过分析比较卸荷和加载不同应力路径下的力学参数,发现在卸荷力学状态下采用卸荷条件测定的参数进行岩体的变形破坏分析,要比在加载状态下测定的更能符合实际。节理岩体的变形等效为完整岩块的变形和节理变形之和,基于变形迭加原理,建立了一种节理岩体卸荷等效连续模型,并运用于工程当中。将计算结果与实测数据作了对比,两者能较为吻合。
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A EQUIVALENT AND CONTINOUS MODEL OF UNLOADED JOINT ROCK MASS
Abstract:Compared with mechanical parameters under different stress path between unloading rock mass mechanics and loading rock mass mechanics, it is founded that the mechanical parameter deprived from unloading test is much more proper to analyse deformation and failure of unloading Joint rock mass than that of unload Joint rock mass. The deformation of joint rock mass is decomposed of the deformations of rock block and joints. Based on the deformation principle of superposition, a equivalent and continuous model of unloaded Joint rock mass is given and applied in the project. The results from calculation and in-situ observations are compared and coincided quite well.
Keywords: Joint rock mass unload constitutive model mechanical parameter
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No.1280611452411792****
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