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Analysis and Prediction of Stress Loss of Pre-stressed Anchor in Foundation Pit
Author(s): 
Pages: 7-10
Year: Issue:  4
Journal: Geotechnical Investigation & Surveying

Keyword:  基坑 预应力锚杆 预应力损失;
Abstract: 目前基坑支护工程中,预应力锚杆加固技术已经得到广泛应用,但对于锚杆锁固以后的预应力变化规律还没有进行深入探讨研究,尤其是针对基坑侧壁为土质边坡的情况。针对锚杆锁固后,预应力的短期内损失和长期运行的稳定性缺乏全面的认识。本文通过对基坑锚杆预应力变化的系统监测和分析,揭示了锚杆以及锚杆预应力在运行过程中预应力变化的3个不同阶段,并分析了相应的影响因素。提出了用应力损失速率进行检测和预测分析的思路。
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