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目前,国内外专家学者对锚杆的传力机制和受力特性方面做了大量的研究工作,但他们的研究主要集中在锚固段,而对于锚杆自由段的研究很少,特别是锚杆自由段地层(被加固体地层)的充分利用问题研究更少。在前人研究的基础上,笔者研究开发了可充分利用被加固体地层(自由段)孔壁粘结强度的递控式锚杆新结构。通过对全长粘结型锚杆和递控式锚杆相关室内试验和光弹试验对比分析,深入研究了递控式锚杆的受力特性和加固效果,以及孔壁粘结强度的分布规律。相关研究成果对实际工程,尤其是暴雨、地震等灾后病害边坡的抢险加固具有重要的理论和应用价值。
At present, domestic and foreign experts and scholars do a lot of research work on the force transmission mechanism and force characteristics of the anchor rod, but their research mainly focuses on the anchorage segment, while the research on the free segment of the anchor rod is rare, especially the bolt There are few studies on the full utilization of the free-range stratum (solidified stratum). Based on the previous studies, the author has researched and developed a new structure of the controlled-type anchor that can make full use of the bond strength of the wall of the stratum (free section) to be reinforced. Based on the comparative analysis of the indoor test and the photoelastic test of the full-length bonded anchor rod and the controlled anchor rod, the force characteristics and reinforcement effect of the controlled anchor rod and the distribution of the bond strength of the hole wall are studied in depth. The relevant research results have important theoretical and practical value for the practical engineering, especially for the reinforcement of the damaged landslides such as rainstorms and earthquakes.