风化岩体中压力型锚索锚固段的剪应力分析

岩体在风化过程中，其物理力学性质会随着风化程度的不同有所差异。结合均质岩体中压力型锚索受力特点，以及内部对称荷载作用下横观各向同性弹性体内的剪应力分布特点，推导出了压力型锚索在横观各向同性弹性岩体内的剪应力分布方程。假定风化岩体为横观各向同性弹性体，其弹性模量及剪切模量均按指数函数变化，分析结果表明：①由于风化岩体的弹性模量随着深度的变化，锚索锚固段的剪应力也随着岩体的弹性模量的增加（减小）而增加（减小）；②在承压板附近，锚索锚固段的剪应力随锚索孔半径的增加而减小，由于风化岩体剪切模量的变化，因而导致剪应力的变化量很大；③在承压板附近，锚索锚固段接触面上的剪应力随着垂直于岩体横向等向面的剪切模量的改变而相应的改变。研究成果可为实际工程中压力型锚索设计提供参考。

Analysis of shear stress along pressure-type anchorage cable in weathered rock mass

The physical properties of rock would be varied with its weathering process levels. Combining with the stress state of anchorage cable in homogeneous rock mass and distributing rule of shear strength in transverse isotropy elastomer under interior symmetry load, the distributing equations of shear strength of anchorage cable in transversely isotropy elastic rock mass are deduced. Assuming that the elastic modulus of weathered rock changes with exponential function, the analysis results show that: ① The shearing strength of anchorage section would increase (or decrease) with the increase (or decrease) of the elastic modulus which change with the depth of weathered rock. ② The shearing strength of anchorage section near to the load-bearing plate would increase with the decrease of anchorage cable boring radius. And the shearing strength changes obviously with the shear modulus of weathered rock. ③ The shearing strength on anchorage section interface close to the load-bearing plate would change with the shear modulus which is in the surface perpendicular to the surface of rock. The research results will provide references to design of anchorage cable in practical projects.