边坡锚索预应力长期监测成果分析

Analysis on prestress state of cable applied to slope reinforcement

边坡预应力锚索加固技术已经得到广泛应用,但对锚索的预应力变化规律还缺乏系统深入的研究,特别是边坡锚固后,锚索预应力的损失情况还缺乏系统全面的认识。本文通过对工程边坡锚索预应力变化的系统监测和资料分析,探讨了边坡锚索预应力的锁定损失及锁定后预应力的变化规律,分析了雨季对锚索预应力变化的影响,同时还分析了二次张拉对提高锚索预应力及减少锚索预应力下降的速率的作用,揭示了边坡锚索预应力变化的基本规律。

Although cable is widely used in slope engineering, the prestress change rules of cable are not studied thoroughly and systematically yet, especially the prestress loss regulation after locked of cable in slopes. Based on the systematical monitoring and analysis in the slopes reinforcement project, the prestress loss of lock and the prestress change rules after locked are studied, the influence of rainfall on the cable prestress state are monitored and discussed. And the paper also analyses the function of compensate method that can raise the prestress and also reduce the loss ratio, bring out the change rules of cable prestress in slope reinforcement.