压力分散型锚索锚固段受力特点分析

In order to understand the stress characteristics on the anchorge section of pressure diffusion cable, indoor model test and finite difference software were used to analyze the distribution of axial strain of injecting cement paste as well as the shear stress between injecting cement paste and hole wall of pressure diffusion cable. The results as follow: first, the defined effective length, which is existed in the axial pressure strain and the shear stress is related to the strength of rock mass and tensile load. Second, the distribution of shear stress in effective length range on the anchorage section is uneven, and the transfer of shear stress the extension of plastic zone was relation to the strength of rock mass.