隧道围岩中全长注浆岩石锚杆的应力分布分析  

Study of reinforcement mechanics for fully grouting rock bolt in tunneling wall rock

作　　者：朱训国[1,2] 杨庆[1,2] 栾茂田[1,2] 

机构地区：[1]大连理工大学土木水利学院岩土工程研究所,大连116024 [2]大连理工大学海岸和近海工程国家重点实验室,大连116024

出　　处：《岩土力学》2007年第S1期173-177,182,共6页Rock and Soil Mechanics

摘　　要：在弹性状态下,根据锚固体的受力情况建立了锚固体的摩阻力分布模型。根据此模型,结合隧道围岩位移变化函数推导了全长注浆岩石锚杆在围岩变形下的全长受力分布函数。并结合工程实例,分析了锚杆的应力分布特征,得出了注浆岩石锚杆在围岩变形中受力的基本特征。The shear stress distribution analytical model of the grouted rock bolt in uniformly deformed tunnel wall rock mass has been developed according to the anchoring solid mass's forcing situation and the M-C yielding criterion of the interface between anchoring solid mass and wall rock mass. And according to the interaction between anchoring solid mass and wall rock mass of tunneling,the interaction model and general solution to the shear stress of the rock bolt without decoupling at the bolt interface have been developed. For rock bolts installed in uniformly deformed rock,the loading process of the bolts due to rock deformation is taken into account in developing the model. Model simulations confirm the previous findings that a bolt in situ has a pick-up length,an anchor length and neutral point.

关 键 词：岩石力学 注浆岩石锚杆 锚固机制 摩阻力 

分 类 号：U451.2[建筑科学—桥梁与隧道工程]