软岩隧道自旋锚管抗拔力的计算理论  

Calculation theory of pullout resistance of self-screwed tube bolting In soft-rock tunnel

作　　者：周杨[1] 惠兴田[1] 唐志强[1] 

机构地区：[1]西安科技大学建工学院,西安710054

出　　处：《中国安全生产科学技术》2010年第2期33-38,共6页Journal of Safety Science and Technology

摘　　要：在软岩隧道支护中,大多数情况下需要向上钻孔打锚杆,目前应用较多的中空注浆锚杆和砂浆锚杆在向上打锚杆的情况下,均存在注浆不饱满及不能形成快速初锚力的问题,影响支护效果和工程安全。自旋注浆锚管能比较好的解决上述工程中存在的技术缺陷。在软岩隧道支护中,自旋注浆锚管的抗拔力是至关重要的技术参数,关系到锚固体系的安全。本文根据自旋注浆锚管的结构特点和作用机理,对其抗拔力的计算理论进行了探讨,对实际支护工程有一定的参考作用。In the support project of soft-rock tunnel,it needs to install roof bolting in most cases.However,the hollow pouring anchorage rod and mortar bolt that are used widely in the current application exist the problems of unfilled grouting and none rapid initial anchoring force that affect the support effect and engineering safety.The Self-screwed Slip Casting Tube Bolt can solve the existed technical problems well in the project.In the support project of soft-rock tunnel,the pullout resistance of the Self-screwed Slip Casting Tube Bolt is the critical technical parameter that related to the security of anchorage system.According to the structural features and mechanism of the Self-screwed Slip Casting Tube Bolt,it discusses the calculation theory of pullout resistance in this passage that can be referenced in the actual support project.

关 键 词：自旋锚管 抗拔力 软岩隧道 

分 类 号：X947[环境科学与工程—安全科学]