Non-destructive testing technology of all-lengthy anchorage rock bolt at early age
Non-destructive testing technology of all-lengthy anchorage rock bolt at early age
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发表时间：
2007
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通讯作者：
Li Yi
中科院分区：
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作者：
Li Yi
根据桩的测试原理，通过理论分析和室内研究，证明了锚固区固结波速的变化，范围从锚杆弹性应力波的波速到自由锚杆中的固结波速，其大小取决于锚杆、锚固介质和粘结强度；当养护时间小于14d时，随着养护时间的增加，固结波速减小；而当养护时间大于14d时，随着养护时间的增加，固结波速增大并趋于固定值，同时给出了锚杆完整性与固结波速的关系。
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 curing time,concretion wave speed enhances and tends to fixed value.At the same time,the relation between rock bolt integrity and concretion wave speed was also given.