【摘要】 在地下工程中,锚杆支护是一种有效的、低成本的支护手段。各国都十分重视锚杆支护机理和设计方法的研究工作。本文对全长固定式锚杆作了一些理论探讨。 文中讨论了锚杆轴向力分布、岩体所受剪力以及剪力作用下的锚杆附加应力场、位移场的特点。并指出在硬岩和软岩中锚杆支护机理是不同的。锚杆与围岩的弹模比对支护效果有重要影响。 文中给出了锚杆支护参数的选择方法。更多还原

【Abstract】 Bolting, as a very effective and relatively cheap support method, was applied for support of mining structures, halls, tunnels, roads, and rail cuttings, dam foundations, etc.. In design and application of the bolt system, the mechanism study of the bolt is significative. In the present paper the mechanism of the full-column resin grouted bolt is discussed.This paper is concerned with the diffusion of an axial load along the bolt, the shear force acting on the rock mass and the additional stress and displacement fields developed in the rock surrounding the excavation by the shear forces. A method for choosing the parameters of the rockbolts is discussed also. All formula were obtained about an circular opening.更多还原