摘要
借鉴桩基检测原理,通过理论分析和实验研究,证明了锚杆锚固体中固结波速确实会发生变化,其变化范围介于激发应力波在自由锚杆杆体中的传播速度和应力波在锚固介质中的传播速度之间,其值大小与锚杆、锚固介质及围岩的黏结强度有关.养护初期(<14 d),随着养护时间的增加,固结波速逐渐减小.当养护时间达到一定值(约14 d)后,随着养护时间的增加,固结波速逐渐增大,并最终趋于定值.同时给出了固结波速和锚固质量的定性关系.
Based on principle of pile testing,concretion wave speed in anchorage volume was proved to change by means of theoretic analysis and laboratory study.It ranges from wave speed of elastic stress wave in anchorage bolt to that in free rock bolt.Its value depends on anchorage bolt,anchorage medium and cohesion intensity.When the curing time is less than fourteen days,with the increase of curing time,concretion wave speed decreases.However,when the curing time is more than fourteen days,with the increase of cur...
出处
《煤炭学报》
EI
CAS
CSCD
北大核心
2007年第10期1066-1069,共4页
Journal of China Coal Society
基金
宁夏高校基金资助项目(06008)
宁夏大学基金资助项目(ZR0620)
关键词
锚杆
锚固体
固结波速
无损检测
rock bolt
anchorage volume
concretion wave speed
non-destructive testing
