【摘要】 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。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,并分析了相应的作用因素。更多还原

【Abstract】 Presently, the reinforcing technology of prestressed anchors has already been widely used in foundation pit supporting projects. However, the rule of prestress changes after the anchor is locked has not been thoroughly studied, especially when the foundation sidewall is a soil slope. The short-term prestress losses and the stability of long-term operation are not clearly understood. This paper, based on system monitoring and analysis of the prestress changes, revealed the three phases of the changes (Phase I, instantaneous losses of load during the lock of operation; Phase II, the load growing slowly; Phase III, the load is almost uniform), and dis-cussed the corresponding incurring factors.更多还原