贯穿裂隙岩体锚固方向优化的模型研究  

THE MODEL STUDY ON OPTIMIZATION OF BOLTING DIRECTION OF ROCK MASS WITH PERSISTENT CRACKS

作　　者：韩建新[1,2] 李术才[1] 李树忱[1] 仝兴华[1] 汪雷[1] 

机构地区：[1]山东大学岩土与结构工程研究中心,济南250061 [2]山东财政学院统计与数理学院,济南250014

出　　处：《工程力学》2012年第12期163-169,共7页Engineering Mechanics

基　　金：国家重点基础研究发展计划(973)项目(2010CB732002);国家自然科学基金项目(51179098);山东省自然科学基金项目(2009ZRB02285);山东大学自由探索项目(2010TS038)

摘　　要：隧道等地下工程开挖后,围岩会产生许多贯穿裂隙,为保持围岩的稳定,通常需要对围岩进行锚杆加固,而锚固方法的好坏对锚固效果有着直接影响。基于库仑强度准则,利用1 3-坐标面上的岩石和裂隙面强度曲线的位置关系,建立了贯穿裂隙岩体强度和破坏方式的确定方法。在此基础上,以锚固后岩体的抗压强度为目标函数,以锚固角度为变量,建立了锚固后贯穿裂隙岩体的抗压强度与锚杆安装角度之间的函数关系,得出了贯穿裂隙岩体抗压强度最大时的锚固角度,提出了贯穿裂隙岩体锚固方向优化的基本方法。After excavation of underground engineering such as tunnels and so on, the surrounding rock mass generates a lot of persistent cracks. In order to maintain the stability of surrounding rock, the rock bolt reinforcement is usually carried out and the anchoring method has a direct impact on the anchoring effect. Based on a Coulomb strength criterion, the identification method of strength and failure mode of rock mass was established by comparing the location relation of a strength curve of rock and cracks in the coordinate system. On the above basis, regarding the compressive strength of the anchoring rock as an objective function and bolting angle as the variable, the functional relationship of compressive strength of the anchoring rock mass with persistent cracks and bolting angle was set up. Thusly the bolting angle was obtained when the compressive strength achieved the maximum. And the fundamental method was presented to optimize the anchoring direction of rock mass with persistent cracks.

关 键 词：贯穿裂隙岩体 锚固方向 优化 模型 强度 

分 类 号：TU45[建筑科学—岩土工程]