关键词: 锚固理论, 失效方式, 荷载传递机制, 剪切滑移模型, 数值模拟

Abstract: Based on comprehensive analysis of a large number of literatures in China and abroad, the authors divide the development of anchorage theory into two stages, and summarize the anchorage theory of rock mass and four failure modes. The primary failure of the anchorage structure is slip failure of bolt-anchorage agent interface. According to the failure characteristics of anchorage structure failure mode, corresponding prevention and control measures are put forward. It is pointed out that the anchorage interface model constructed in the load transfer mechanism of anchorage interface is mainly shear slip model and shear lag model. The nonlinear shear slip model is considered as the mainstream model for the load transfer mechanism of anchorage interface. The influence parameters of interface model are analyzed, determining that the stress distribution pattern of the anchorage interface is that the interface shear stress is nonlinearly distributed along the anchorage length. The numerical simulation method and its applicability of the anchorage structure are sorted out. It is found that the anchorage interface mechanics explored based on the continuous-discrete coupling method while considering the diversity of the anchorage structure materials has great advantages and is worth popularizing. Suggestions on the indoor and on-site pull-out test of the anchorage structure of the multi-monitoring system are proposed. Finally, discussions and prospects are made on the theoretical derivation, numerical analysis, and pull-out test of the anchorage interface mechanics.

Key words: anchorage theory, failure mode, load transfer mechanism, shear slip model, numerical simulation