全长注浆岩石锚杆双曲线模型的建立及锚固效应的参数分析  

DEVELOPMENT OF HYPERBOLIC MODEL FOR FULLY GROUTING ROCK BOLT AND PARAMETERS ANALYSIS FOR ANCHORING EFFECT

作　　者：杨庆[1] 朱训国[2] 栾茂田[1] 

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

出　　处：《岩石力学与工程学报》2007年第4期692-698,共7页Chinese Journal of Rock Mechanics and Engineering

摘　　要：根据局部变形理论,通过将岩体对锚固体界面的剪切作用简化为一系列独立作用的切向弹簧,通过锚固体的受力平衡,建立注浆岩石锚杆界面剪应力和轴向载荷的计算方程,并在此基础上对影响锚杆锚固效果的参数进行分析。通过建立的剪应力和轴向载荷的计算公式,得到全长注浆岩石锚杆的界面剪应力和轴向载荷的分布函数,即双曲线分布函数,在对影响其锚固效果参数分析的基础上,得出影响全长注浆锚杆锚固效果的参数有锚固体(锚杆)的直径、弹性模量以及注浆体和围岩体的综合参数,为正确理解注浆岩石锚杆的锚固机制提供一定的依据。　According to local deformation theory,taking the action of rock mass against grouting rock bolt as a serious of spring,the shear resistance increases linearly with shear displacement between grouting mass and surrounding rock,and the hyperbolic model for grouting rock bolt has been developed on the base of rock bolt′s force equilibrium.The distribution of shear resistance,axial force and shear stress density along the grouting rock bolt is obtained.From the shear stress and axial force of grouting rock bolt,the parameters affecting the anchoring effect have been analyzed.It is concluded that the larger the radial of rock bolt is,the greater the anchoring effect is;the greater the elastic modulus of rock bolt is,the better the anchoring effect is;and as the comprehensive parameter of grouting mass and surrounding rock increasing,the anchoring effect becomes better.

关 键 词：桩基工程 注浆岩石锚杆 双曲线模型 锚固效果 

分 类 号：TU472[建筑科学—结构工程]