隧道式锚碇的承载机理及夹持效应指标分析OA北大核心CSTPCD

To measure the influence of the clamping effect of tunnel-type anchorage(TTA)by analyzing the bearing characteristics of TTA,the clamping effect coefficient and peak bearing capacity were proposed as the clamping effect index,and their expressions were derived by using the Mohr-Coulomb theory.A finite element analysis of the TTA of the Puli Bridge was conducted,and its applicability and accuracy were verified by calculating the clamping effect index by analyzing its stress,plastic zone,and other indicators.The clamping effect coefficients under differ-ent displacement states were analyzed,and suggestions for the design of TTA were made in terms of displacement,load,bearing capacity,and clamping effect coefficients.Results showed that the error between the formula calcula-tion,finite element analysis,and existing research is＜10％and the obtained formula has good applicability and ac-curacy.Under a constant-load condition,the clamping effect coefficient of TTA increases with decreasing bearing capacity,indicating that the appropriate reduction of the bearing capacity of TTA helps the clamping effect to play a role,and TTA also satisfies its advantages of protecting the environment and saving resources.The research re-sults can provide a basis for the TTA design.