【作者】 李新平； 代翼飞； 刘金焕； 郭运华； 徐剑；

【Author】 LI Xin-ping~1,DAI Yi-fei~1,Liu Jin-huan~2,GUOYun-hua~1,XV Jian~1 (1.Hubei Key Laboratory of Roadway Bridge and Structure Engineering,Wuhan University of Technology,Wuhan 430070,China;2 Daduhe Hydropower Development CO,LTD,Chengdu,610016,Sichuan)

【机构】 道路桥梁与结构工程湖北省重点实验室武汉理工大学； 大渡河流域水电开发有限公司；

【摘要】 本文将岩体、金属锚杆、砂浆胶结材料看作一种锚固岩体复合增强材料,通过能量等效的原理,建立岩体复合增强材料的层状模型,定量分析和研究锚固岩体的等效力学性质。在此基础上,针对地下洞室的扇形锚固结构,认为随着锚固深度的增加,锚杆的间距也随之增加,因此地下洞室锚固岩体的等效力学性质将随着锚杆间距的变化而变化,通过上述方法可以建立起地下洞室锚固岩体的等效力学参数与锚固深度之间的函数变化关系,并利用有限元方法计算了地下洞室锚固结构的等效性质,验证了理论分析的结果。通过上述问题的解决,那么将对地下洞室的扇形锚固支护中的锚固机理有更清楚的认识。更多还原

【Abstract】 Rock mass.rock bolts and cement mortar are regarded as composite reinforced material of anchored rock mass in this paper.Layered model of anchoring composite material is established according to the principle of strain energy equivalent and mechanical properties of anchoring rock mass are studied quantitatively.On the basis of above analysis,for the space between rock bolts arranged in sector will increase with the anchoring depth growth,the equivalent mechanical properties of the reinforced rock mass will vary when the space between rock bolts changes.Functions of equivalent mechanical parameters related to the rock bolts anchoring depth of the underground cavity anchoring composite material are deduced and deformation stability is analyzed with the finite elements methods.So the anchoring mechanism of the rock bolts arranged in sector in the underground cavity will be realized more clearly.更多还原