考虑地应力卸荷过程的节理岩体锚固特性物理模拟研究.pdfVIP

第36 卷第11 期 第36 卷第11 期 水力发电 2010 年 11 月 地质与勘测 考虑地应力卸荷过程的节理岩体 锚固特性物理模拟研究 黄宜胜， 李建林 （三峡大学水利与环境学院， 湖北 宜昌 443002 ） 摘 要： 实际工程中的节理岩体在锚固之前一般都经历了地应力卸荷过程。 利用RMT-150C 岩石力学试验系统， 同 时进行了考虑地应力卸荷过程的节理岩体锚固特性物理模拟试验 卸荷试验 和不考虑地应力卸荷过程的节理岩体 ( ) 锚固特性物理模拟试验 常规试验 。 试验结果表明， 常规试验所获得的力学参数偏小， 力学参数在一定程度上被低 ( ) 估了， 且变形模量被低估的程度更大。 因此， 考虑地应力卸荷过程更加符合工程实际。 关键词： 节理岩体； 锚固特性； 地应力； 卸荷过程； 物理模拟 Physical Simulation on Anchor Characteristics of Jointed Rock Masses after Considering the Unloading Process of Ground Stress Huang Yisheng, Li Jianlin (College of Hydraulic Environmental Engineering, China Three Gorges University, Yichang Hubei 443002) Abstract: Jointed rock masses in real engineering have usually suffered an unloading process of ground stress before anchored. Physical simulation test for anchor characteristics of jointed rock masses after considering the unloading process of ground stress (unloading test) and the test which dont consider the unloading process of ground stress (general test) were carried out at the same time using RMT-150C rock mechanics test system. Test results show that the mechanics parameters gained from general test are much smaller than real one and undervalued, and the deformation modulus is undervalued in a bigger extent. Unloading test is more real for engineering practice as considering the unloading process of ground stress. Key Words: jointed rock mass; anchor characteristics; ground stress; unloading proc