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基于相似理论,在实验室采用混凝土块模拟现场岩体进行了锚杆拉拔力测试试验方案研究。设计进行了夹片式锚具、塑料螺母、金属螺母和金属套管等4种锚固方式的玻璃钢锚杆拉拔试验,对比分析不同试验方案下的试验现象和结果。夹片式锚具试验方案、塑料螺母试验方案、金属螺母试验方案在试验过程中产生脆性破坏、螺母破裂和滑丝破坏,测得的平均拉拔力分别为52,47.7,77.3kN,与真实拉拔力存在较大偏差。而金属套管试验方案在试验过程中没有出现锚杆破坏现象,测得平均拉拔力为93.8kN,与真实拉拔力偏差较小,可以较为准确测得锚杆的真实拉拔力,其测试结果可为评价支护效果提供依据。
Based on the similarity theory, a test program of anchor pullout force test was carried out in the laboratory by using concrete blocks to simulate field rock mass. Four kinds of anchoring methods such as clip anchorage, plastic nut, metal nut and metal casing were designed for the pull-out test of FRP anchors. The test results and results under different test schemes were compared and analyzed. Clip anchor test program, plastic nut test program, metal nut test program in the process of brittle failure, rupture of the nut and sliding wire damage, the measured average pull-out were 52,47.7,77.3 kN, and the real There is a big deviation of drawing force. The metal casing test program in the test process does not appear the phenomenon of bolt failure, measured the average pull-out force of 93.8kN, and the actual pull-out force deviation is small, you can more accurately measure the true bolt pull force, which The test results can provide the basis for evaluating the support effect.