Analysis on the Anchoring Effect of the Point Anchoring Rockbolt and the Full Length Rockbolt
A modified discontinuous deformation analysis (DDA) algrithm was proposed to study the deformation mechanism of rockbolt nearby the fracture surface and the interaction between the rockbolt and the fracture surface. In the modified method, it is assumed that the rockbolt has no deformation in rock mass and its restriction effect on the fracture surface can only be considered. A normal and tangential spring is applied to the fracture surface separately to simulate the full length rockbolt. A tunnel was reinforced by using the full length rockbolt and the point anchoring rockbolt respectively. The simulation results indicate that the modified discontinuous deformation analysis (DDA) method is effective for the reinforcement of tunnel. It is found that, in general, the anchoring effect of the full lenth rockbolt is better than that of the point anchoring rockbolt.
discontinuous deformation analysis the full length rockbolt the point anchoring rockbolt rock reinforcement tunnel stability
Chun-mei ZHENG Yu-yong JIAO Wei-shen ZHU Yan-hui GE
Geotechnical and Structural Engineering Research Center Shandong University Jinan,China State Key Laboratory of Geomechanics and Geotechnical Engineering Institute of Rock and Soil Mechani Department of Civil Engineering Shandong Jiaotong University Jinan,China
国际会议
上海
英文
626-629
2009-11-20（万方平台首次上网日期，不代表论文的发表时间）