大变形围岩内锚杆的承载能力分析

Analysis of bearing capacity of bolts anchoring in large deformation surrounding rock

结构的设计要依据其荷载和承载能力.大变形围岩的锚杆支护设计一般还是采用经验类比法,主要原因之一是不能合理确定锚杆的承载能力.在总结锚杆破坏形式的基础上,提出了锚固力的定义,推导出承载能力的计算分析方法,并且也为锚固段长度的确定和是否使用锚杆托板等技术争论提供了评判依据.图5,参8.

The design of structure depends on loads and bearing capacity.The bolting design of large deformation surrounding rock usually depends on experience,one of the main reasons is the bearing capacity of bolts.Based on the analysis of the failure of bolts,the anchoring forces are defined,the analyzing methods of bearing capacity is presented.5figs.,8refs.