基于载荷传递机理的注浆岩石锚杆锚固模型(Ⅰ)  

Study of reinforcement mechanism of fully grouting rock bolt based on load transfer mechanism Ⅰ

作　　者：朱训国[1,2] 王大国[1,3] 

机构地区：[1]大连大学材料破坏力学数值试验研究中心,辽宁大连116622 [2]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 [3]长沙理工大学水沙科学与水灾害防治湖南省重点实验室,湖南长沙410076

出　　处：《辽宁工程技术大学学报（自然科学版）》2008年第6期813-816,共4页Journal of Liaoning Technical University (Natural Science)

基　　金：国家自然科学基金资助项目(50679015，50809008);水沙科学与水灾害防治湖南省重点实验室开放基金资助项目(2008SS04)

摘　　要：为了进一步研究隧洞等地下工程中锚杆支护锚固机理,根据微段锚杆的受力平衡以及载荷传递机理建立了锚杆的载荷传递微分方程,同时根据隧道围岩安装锚杆前后的应变变形建立了锚杆的轴向载荷的传递方程,结合圆形隧洞围岩的径向变形方程,推导了理想弹塑性围岩中注浆岩石锚杆的轴向应力的计算模型,以及锚固段与围岩体界面之间的摩阻力的计算模型。通过对比工程实测结果与模型计算结果,验证了所建立的模型的正确性,同时也验证了巷道锚杆支护中性点理论的合理性与正确性。The bolt＇s load transfer differential equation was established according to the stress equilibrium in a small section of a bolt and load transfer mechanism. And according to the rock mass deformation before and after bolt assembling, the rock bolt＇s load transfer equation was gained. And combining the radial deformation of tunnel wall rock mass, the axial force and friction resistance of rock bolt was gotten. Through comparing the measured data with the model computed result, it has been confirmed that the model is accurate. And then, it has been also confirmed the rationality and the accuracy of the tunnel reinforcement neutral point theory.

关 键 词：岩石力学 注浆岩石锚杆 锚固机理 摩阻力 

分 类 号：TU45[建筑科学—岩土工程]