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工程力学  2012 

贯穿裂隙岩体锚固方向优化的模型研究

DOI: 10.6052/j.issn.1000-4750.2011.04.0247, PP. 163-169

Keywords: 贯穿裂隙岩体,锚固方向,优化,模型,强度

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Abstract:

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。

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